[1]The present invention relates to that, more specifically, the sintering apparatus and a sintering method which can improve the quality and productivity of sintered ore and, reducing the emission of pollutants according to the sintering apparatus and a sintering method.
BACKGROUND
[2]After the sintered ore used as a raw material in the blast furnace iron making process is mixed with a binding agent for iron ore and coke minutes (or hard coal), and combusting the coke, it is produced by sintering iron ore in the heat of combustion.
[3]
Typical sintered ore production equipment is disposed arranged in a surge hopper, one direction in which the combination of after the upper light hopper, iron raw material and the heat source coke upper light stored mixed assembled raw materials are stored, proceed the process receives provide upper light and blended raw material the ignition to be installed on the plurality of the vehicle, an upper balance being transported to the process advancing direction by a conveyor, a conveyor for transporting a plurality of balance to the process proceeding direction is transferred to the direction of spraying the flame to sinter the raw material, which is charged to a balance, a plurality of the bogie is provided are listed in a path that is transferred to the step traveling direction are arranged in one direction, connected to the plurality of wind boxes, ducts, duct connected to the end of the plurality of wind box for sucking the inside of the plurality of balance the attractive force and a blower (not shown) for generating.
[4]
The sintering operation is performed by applying a suction force on the balance to form a negative pressure in a wind box disposed below the balance. That is, if the blower is driven to the upper side of the vehicle and the air intake are the windbox, the ignition flame to the upper surface of the raw material for sinter the sintering proceeds while moving to the lower side.
[5]
Is conventional to discharge the exhaust gas of sintering the air sucked through the wind box to the outside. However, such a gas may contain the following ingredients, which may pollute the environment. Further, the sintering exhaust gas has a large number of thermal energy because the gas produced passes through the high temperature of the sintered ore. Thus, when discharging the sintering exhaust gas to the outside, can result in environmental pollution, there is a lot of energy loss.
[6]
(Patent Document 1) A KR2014-0016658
Detailed Description of the Invention
SUMMARY
[7]
The present invention provides a sintering machine and sintered way by circulating the exhaust gas generated during the sintering process can inhibit or prevent pollution.
[8]
The present invention provides a sintering apparatus and a method capable of sintering to supply the exhaust gas and the air in the sintering raw material improves the combustion efficiency and increase productivity.
Problem solving means
[9]
The present invention is arranged to be movable along a route, which is the raw material for sinter is charged to the internal balance; To the ignition is provided on the moving path so as to inject flames into the upper portion of the sintering raw material; A plurality of wind boxes arranged along the moving path in the lower side of the truck to provide a suction force to the balance; A hood is placed above the bogie extending along said travel path; Circulating unit for connection with a portion of the plurality of wind box and, supplying the exhaust gas to the wind box of the suction part with the hood; And a supply air connection and at least one of the hood part and the rotation to supply air to the sintering raw material; It includes.
[10]
The circulation unit includes circulation pipe for connecting a portion of the plurality of wind box and forms a space where the gas is received in the interior; Cycle which form a path where the exhaust gas movement, and one end is connected to the circulation pipe and the other end connected to said hood line; And a blower installed in the circulation line; It includes.
[11]
The circulation pipe and connected with the windbox between the flow rate is increased with a decreasing point and the temperature of the exhaust gas of the exhaust gas branches is maximized.
[12]
The hood is, from the upper part of the windbox sinter point of the lowest layer of the combustion start to cover the upper part of the wind box to be disposed at the rearmost in the moving path.
[13]
The number of the wind box which covers the hood is greater than the number of the windbox connected with the circulation pipe.
[14]
And forming an opening in the top surface of the hood, the air supply unit comprises a door unit installed in the hood so as to open and close the opening.
[15]
The opening is in close proximity to the ignition portion than the circular line and that the hood is connected.
[16]
A pressure sensor which is installed in the hood; And a controller for controlling the operation of the door unit in accordance with the pressure within the hood; and further comprising a.
[17]
The air supply unit, forming a path for air to move, and includes a supply line that is connected to the circulation line.
[18]
An oxygen sensor which is installed in the circulation line; And a control unit for controlling the amount of air supplied to the circulation line in accordance with the oxygen concentration inside the circulation line; Further included.
[19]
The present invention provides a method for producing sintered ore, comprising: charging the raw material for sinter in the balance of moving along the movement route; The process of the ignition flame to the upper surface of the sintering raw material; The process of sucking the exhaust gas to the lower direction of the sintering raw material; And the step of supplying a portion of the exhaust gas and intake air to the sintering material in the truck through the hood is installed on the moving path; It includes.
[20]
Process for supplying the air as a raw material, is the measuring of pressure within the hood; And the step of supplying air to the sintering material, when the pressure within the hood is less than a predetermined set pressure value; It includes.
[21]
Process for supplying a portion of the air and the sucked flue gas to the raw material for sinter, the injection of air at the front end of the hood, and comprising the step of injecting the exhaust gas from the rear end of the hood.
[22]
Process for supplying the air as a raw material, the process of measuring the oxygen concentration of the exhaust gas sucked; And the step of supplying air to the sintering material, when the oxygen concentration of the exhaust gas equal to or less than the suction predetermined set density value; It includes.
Effects of the Invention
[23]
According to embodiments of the present invention, by supplying a off-gas generated in the air and the sintering process in the sintering raw material it can be involved in the sintering process. Thus, the circulating exhaust gas to be reused, so it is possible to suppress the pollution caused by exhaust gas or prevented.
[24]
In addition, the exhaust gas may be because the oxygen concentration is lower than that of normal air, lowering the combustion efficiency. Therefore, since the oxygen concentration exhaust gas with a high supply air to sinter together, it is possible to suppress or prevent the lowering combustion efficiency. That is, by supplying air, and to improve the combustion efficiency of the sintering material, the productivity of the sintering process can be increased.
[25]
Further, as the sintering of the raw materials for sinter to proceed there, the amount of air passing through the sinter raw material to increase the air flow resistance can be reduced, it is possible to draw air into a larger suction force in the region where the air flow resistance increases. Therefore, preventing the decrease in the amount of air passing through the sinter raw material by the combustion of the sintering raw material can be carried out stably. Thus, the quality of the sintered ore saengsang that can be improved.
Brief Description of the Drawings
[26]
1 shows a sintering apparatus according to an embodiment of the present invention.
[27]
Figure 2 is a view showing the characteristics of the cross-sectional shape and cross-section of the flue-gas developer of the sintered layer of the sintering process in the embodiment;
[28]
Figure 3 is a view of the sintering apparatus in accordance with another embodiment of the present invention.
[29]
Figure 4 is a view showing a sintering apparatus according to an embodiment of the present invention.
[30]
5 is a diagram illustrating a sintering method according to an embodiment of the invention.
Mode for the Invention
[31]
With reference to the accompanying drawings, the present will be described in more detail in an embodiment of the invention. However, the present invention is not limited to the embodiments set forth herein will be embodied in many different forms, but the embodiment are also the teachings of the present invention to complete, and will fully convey the concept of the invention to those of ordinary skill It will be provided to make known. In order to specifically describe the invention, the drawing is the same numerals refer to like elements in the drawings, it may be exaggerated.
[32]
[33]
1 is a view showing a sintering device in the embodiment;
[34]
1, the sintering apparatus 100 according to an embodiment of the present invention is arranged to be movable along the movement path, spraying the flame to the upper part of the track that the sintering raw material on the inner contents 110, the raw material for sinter on the upper side of the ignition, which is installed on a moving path to 130, a plurality of which is disposed along the movement route from the lower side of the vehicle 110 to provide a suction force on the balance 110, the windbox 140, a balance 110 circulation unit (160 to place and connect with a portion of the hood 150 which extends along the movement route, a plurality of the windbox 140, and supplies the sucked exhaust gas in some wind box 140 of the hood 150 ), and includes at least the air supply unit 170 is connected with one of the hood 150 and the rotation unit 160 so as to supply the air into the raw materials for sinter.
[35]
Further, the sintering apparatus 100 includes a charging unit 120, a connection with the windbox (140) that is not associated with a circular part (160) of the plurality of wind box 140 for charging a sintering raw material on the balance (110) that the gas discharge unit 50, and the air can supply further includes a controller 190 that controls the operation of 170, the hood 150 to measure the pressure inside the pressure sensor 181 and the rotation unit (160 ), an oxygen sensor 182 for measuring the oxygen concentration of the exhaust gas sucked in can be provided with at least one of a.
[36]
Balance 110 may be arranged to rotate in the caterpillar manner, forming a closed loop path formed by the switch that connects the Recurrence Recurrence path and the movement route and the path of movement of the upper-side path and the lower side. In the moving path, the operation is carried out by charging a sintering raw material for sinter inside the balance unit 110, the path moves the empty Recurrence balance 110, the light distribution of sintered ore.
[37]
For example, the movement route is the ignition interval may be extended in the longitudinal direction, located at the rear of the charging period, charging section that is positioned at the foremost loading section 120 of the moving path arrangement (130) arranged in the ignition, located at the rear of the lighting section may include a sintering period which is the raw material for sinter is sintered. That is, when it passes through the charge section is the raw material for sinter is charged to the balance (110), when passing through the ignition period the flame is ignited within the raw material balance 110, the upper portion of the raw materials for sinter the ignition flame to the material in the sintering section this sintered ore is produced while moving at a lower portion. At this time, the truck 110 may be moved to the rear from the front of the moving path.
[38]
Balance 110 form a space in which the sintered material is accommodated therein and is installed on a plurality of endless track can be moved and the movement route Recurrence path. Thus, a plurality of the track (110) to perform operations for producing a sintered ore is continuously moving in Recurrence movement route to move in the path or paths in Recurrence route.
[39]
Loading unit 120 is arranged on the charging section of the movement path. Loading unit 120 is located at the upper side of the vehicle 110 to be charged to the sintering material with the open top of the track 110. The Loading unit 120 is disposed at the lower portion of the sintering raw material hopper, and the hopper to be stored therein may include a charging chute for guiding the sintering raw material discharged from the hopper to the inside of the track 110. Thus, it can be the raw material for sinter is charged into the balance 110 that passes through the charged zone.
[40]
To the ignition unit 130 is disposed in the ignition region of the movement path. To the ignition unit 130 is responsible for being disposed in the rear of the loading unit 120, the flame jet from the upper side of the track (110) on the raw material charged on the balance 110. Thus, it is possible to the ignition within the charged raw materials balance 110 through the ignition section.
[41]
Windbox 140 is arranged in a plurality of the moving path, and serves to suck the flue gas from the lower portion of the vehicle 110 passing through the conveyance path. Thus, the air of the upper balance 110 can be drawn into the wind box 140 through the raw material for sinter of the inner balance 110. Thus, there is an ignition flame to the upper surface of the sintered material can be sintered to full sintering material while moving to the lower side along the air.
[42]
It serves to gas discharge part 50 provides a suction force to wind box 140 for non-connection and a circulation section 160 a plurality of the windbox 140, and thereafter discharging the exhaust gas sucked to the outside. Gas discharge section 50 is connected to the lower portion of the wind box 140 and the suction pipe 51, the suction pipe 51, a dust collector 52, a main blower connected to having a space in which the suction-gas inside the receiving 53, and it may include a chimney 54. Thus, when the main blower 53 generating the suction force, the suction pipe 51, the exhaust gas flows into the wind box 140 is sucked and is discharged to the chimney 54 through the dust collector after the 52 filtration. At this time, the exhaust gas may be sucked through the sintering raw material to the windbox 140 is air.
[43]
Circulation unit 160 includes a plurality of wind boxes 140 are connected to the part of the circulating exhaust gas to be sucked and serves to supply to the upper portion of the track 110. Circular portion 160 is connected to the part of the plurality of wind box 140 is formed in the circulation pipe 161, a path where the exhaust gas is moved to form the space in which the exhaust gas is received within, and once the circulation pipe (161) connected, and the other end comprises a hood 150, a blower 163 installed in the circulation line 162, and the circulation line 162 connected to the.
[44]
Circulation pipe 161 to form a space in which the exhaust gas therein, and is connected with a portion of the plurality of the windbox 140. Specifically, is connected with the windbox (140) between the circulation pipe 161, the branch point and the temperature of the exhaust gas to decrease the flow rate is increased in the exhaust gas is maximized.
[45]
[46]
Figure 2 is a view showing the characteristics of the cross-sectional shape and cross-section of the flue-gas developer of the sintered layer of the sintering process in the embodiment;
[47]
The combustion of the raw materials for sinter stand combustion is actively up the high temperature region. Referring to Figure 2, and gradually moves downward by being sucked into the lower stand in the upper combustion air, combustion for the upper part is cooled by the ambient air. At this time, since a single combustion air flow resistance than the grain size minute sintered material, an increase in the combustion band thickness decreases the amount of exhaust gas that is drawn into the wind box 140. Thus, the point (A) to reduce the flow rate of the exhaust gas is increased may be a point at which the air flow resistance of the inner balance 110 increases (point to increase the combustion band thickness).
[48]
On the other hand, the high-temperature air that has passed through the raceway is reduced by meeting the temperature and lower the raw material for sinter for a smile result of the combustion. The water vapor evaporated from the raceway is condensed to form a wet-to. After reaching to the bottom of the combustion consideration the balance 110 becomes no sintered material layer wet-to-result, and smiles. Thus, the high-temperature air that has passed through the raceway is not cooled as it passes over the unsintered sintered material or a wet-to, is drawn into the wind box 140 to a high-temperature state. Thus, the temperature of the exhaust gas that is drawn into the wind box 140, the temperature decrease from, the point at which the sintering is close to completion of the sintering raw material after increased up to a maximum temperature.
[49]
This flow rate is increased with a decreasing point and the temperature of the exhaust gas to the exhaust gas up to the point at which: because the air flow resistance increases in the windbox 140 between (BTP Burn Through Point), air can be smoothly sucked in this zone so that the windbox 140 only may be connected with a separate circulation pipe (161) provide a greater suction force than the other windbox 140. In other words, increasing the air flow resistance larger with increasing combustion band thickness, but by increasing the suction force of the wind box 140, it is possible to increase the air volume. Accordingly, the productivity and quality of the sintered ore to be produced and sintering of the sintered material is smoothly can be improved.
[50]
Further, when the connection point (A) prior to the wind box 140 and the circulation pipe 161 to decrease the flow rate is increased by the exhaust gas, the combustion rate is faster, but is cooled in the air more quickly. Therefore, the strength of sintered ore can be reduced by sufficient heat is supplied to the sintered layer. Therefore, it should be connected to the wind box 140 and the circulation pipe 161 from the point of decreasing the flow rate is increased by the exhaust gas or from a later point.
[51]
In addition, the point (A) to decrease the flow rate is increased in the exhaust gas is a point at which SOx is generated. SOx may generate a sulfuric acid reacts with the moisture in the exhaust gas, it is possible to corrode the inside of the circulation pipe (161). Thus, the circulation line 161 can be introduced into the circulation pipe 161 of the high-temperature exhaust gas even with the temperature of the inside that is adapted to be at least the dew point is the temperature at which the sulfuric acid is generated. Thus, it is possible to increase the exhaust gas temperature and the internal temperature of the point having the maximum windbox circulation pipe 161 to the high-temperature exhaust gas in connection with the circulation pipe (161) to (140).
[52]
Alternatively, the point at which the coal is included from the point of decreasing the flow rate is increased by the exhaust gas in the sintering raw material is exhausted or, the inflection point of the exhaust gas temperature gradient (BRP: Burn Rising Point) windbox 140 and the circulation pipe to the (161 ) it can also connect you.
[53]
At this time, the temperature sensor can be installed to each wind box 140 to measure the temperature of the exhaust gas flow rate sensors and to measure the flow rate of the exhaust gas on. Thus, the temperature at which a reduction in the flow rate of the exhaust gas increased by the plurality of the windbox 140, and the exhaust gas can be seen the position of the point at which a maximum.
[54]
Circulation line (162) forms a path for the exhaust gas moves. Circulation line 162 one end is coupled to the lower portion of the circulation pipe 161, the other end can be coupled to the upper portion of the hood 150. Therefore, it is sucked into the exhaust gas circulation pipe 161 can be supplied to the hood 150 to move along the circular line 162. The
[55]
The blower 163 is provided in the circulation line 162, to generate a suction force. Thus, the exhaust gas can be drawn into the wind box 140, the exhaust gas sucked into the windbox (140) can be supplied to the hood 150 through the circulation line (162).
[56]
In the wind box 140 is connected to the circulation pipe (161) of the plurality of wind box 140, the blower 163 provides the suction force, and the suction pipe 51 and connected to the windbox (140) provided with a main blower ( 53) provides a suction force. Thus, it is possible to provide a greater suction force than the suction force provided to all wind box 140 to a blower in each windbox 140. In this case, it can be less than the wind box 140 is connected to the number of the suction pipe 51 of the wind box 140 is connected to the circulation pipe (161). Therefore, the size of the suction force of the blower 163, and the main blower 53 is generated may cause a greater suction force on the wind box 140 is connected to the circulation pipe 161 gatahdo. That is, it is possible to provide a larger suction force on the air flow resistance is large area to inhibit or prevent the flow of the exhaust gas decreases.
[57]
Hood 150 is responsible for supplying the exhaust gas sucked into the circulation pipe 161 is arranged spaced apart on the upper side of the track 110 to within the sinter the balance 110. Hood 150 may be formed extending in the front-rear direction, and the top and the side so as to cover the upper portion of the windbox 140 is closed, the lower part can be opened. Therefore, there is the off-gas supplied to the hood 150 can be discharged to the lower portion of the hood 150.
[58]
For example, the hood 150 is disposed at the rearmost of the travel path from the windbox 140, the upper part of (a point to reach the lower part of the or combustion cost balance 110) sinter point of the lowest layer of the combustion start is extended may be formed so as to cover up the upper portion of the windbox 140.
[59]
The exhaust gas is caused while air passes through the raw material for sinter, the sintered material is burned by the oxygen in the air. Therefore, the exhaust gas has an oxygen concentration lower than the normal air. When supplying this exhaust gas into the combustion portion of the proceeds most actively in productivity and quality of the sintered ore is lowered.
[60]
Thus, it is possible to burn the off-gas is supplied to the exhaust gas circulation area less occurs. That is, the windbox between the hood 150 is combustion is less to occur starting point from (or the raw material for sinter the lowest point at which combustion starts), the point at which combustion is completely finished (or, the rearmost points of the moving path) to ( It may be extended to feed the exhaust gas into a 140).
[61]
In addition, a number of hood windbox 140, 150 is covering be greater than the number of the wind box 140 is connected to the circulation pipe (161). Since the high-temperature exhaust gas is sucked into the circulation pipe 161 is larger in volume than normal air. (If or, the hood 150 is reduced the area for supplying the off-gas) windbox 140 is because the volume of the exhaust gas to the intake is limited, the hood 150 covers the windbox 140, the number of small, , some of the exhaust gas discharged from the hood 150 is not being drawn into the wind box 140 and is discharged to the outside may result in environmental pollution.
[62]
Because when increasing the length extending in the hood 150, increasing the number of the windbox 140, a hood 150 covering, the exhaust gas discharged from the hood 150 can be sucked all the windbox 140 hood the exhaust gas discharged from 150 may be blocked from being leaked to the outside. Thus, the windbox windbox 140 is 140, the connection number of the windbox 140, a hood 150 covering to suction all of the discharged flue gas in the hood 150 and the circulation pipe (161) It can be increased than the number. At this time, the front end position and rear end position of the circulation pipe 161 of the hood 150 relative to the forward and backward directions may be overlapped with each other.
[63]
[64]
An air supply unit 170 according to an embodiment of the present invention may include a door unit 171 is provided in the upper portion of the hood 150. At this time, at least a portion of the upper surface of the hood 150 may be opening is formed, is installed on the hood (150) may open and close the opening. In addition, the air supplied from the air supply unit 170 may be a general air or external air (ambient air) that had not passed through the raw material for sinter.
[65]
For example, the opening portion of the hood 150 may be may be formed in a square shape, the door unit 171, a driver for moving the plate and the plate for covering the opening.
[66]
Plate may be formed corresponding to the shape of the opening, it is mounted slidably on the hood 150. The For example, the plate may be installed to enable forward and backward from the upper surface of the hood 150. Therefore, when advancing the plate, the plate can be in response to the opening position can close the opening. On the other hand, when the reversing plate, the opening can be opened while the plate is moved. Therefore, when opening the opening portion of the hood 150, the external air may be introduced into the hood 150, when closing the opening portion of the hood 150, the external air is introduced into the hood 150 It can be blocked. However, the method provided in the structure and the shape and the hood 150 of the plate can vary without being limited thereto.
[67]
Actuator serves to move the plate. For example, the actuator may be a cylinder, and can be connected to one end of the plate and the other end fixed to the hood 150. Therefore, when one end is forward of the driver may move forward by a plate to close the opening of the hood 150, once the reverse of the driver can open the opening portion of the hood 150 and the reverse plate. However, the method for the actuator to move the plate can vary without being limited thereto.
[68]
At this time, the openings are arranged close to the circulation line 162 and 130 to the ignition than the portion connected to the hood (150). That is, the opening is located forward of the connected portion of the circulation line 162 and the hood 150. For example, based on the front-rear direction opening is formed prior to one-half point of the hood 150 (or the center), the circulation line 162 can be associated with parts of the after 1/2 of the hood 150 have. Thus, the hood 150 is roneun windbox (140) located in front of the wind box 140 to cover and air flows, can be circulated gas is supplied roneun wind box 140 is located to the rear. That is, the hood 150 covers the windbox (140) of the windbox balance located in front of the bogie 110 through a wind box 140, the balance 110, and located to the rear in by the unit 140 is located at the front (110 ) it is carried out more actively burning in me. That is, it must be supplied with more oxygen in the balance (110) located in front. Thus, the combustion is made more actively supply air to the front of the bogie 110, bogie roneun 110 of the back it is possible to supply a small amount of oxygen off-gas.
[69]
Also inside, the hood 150 may be a pressure sensor 181 is installed. Pressure sensor 181 serves to measure the inside of the hood 150, pressure. Pressure sensor 181 may be measured is provided with a hood 150, the pressure only in one position within, it is also possible to be provided with a plurality of measuring the pressure at a plurality of locations within the hood (150).
[70]
The controller 190 serves to control the operation of the door unit 171 according to the inner hood 150 pressure. The controller 190 is coupled to the pressure sensor 181, a hood 150, a transceiver 191 for transmitting and receiving a pressure of the internal, is connected to the transceiver 191 of the inner hood 150 entering the transmitter 191, the pressure and according to the determination of the determiner 192, and a determiner 192 for comparing a predetermined set pressure value can be a controller for controlling the operation of the actuator.
[71]
The determiner 192 may send a signal me to open the opening of the hood 150, is compared to the pressure and the set pressure value of the internal pressure within the hood 150, it sets lower than the pressure value hood 150 to the controller. At this time, the set pressure value can be an atmospheric pressure. That is, the hood 150 to become air flows into the inside of the inner hood 150, the pressure must be lower than the atmospheric pressure. Therefore, when opening the opening portion when the interior of the hood 150, a pressure lower than the atmospheric pressure of the outside air is introduced into the hood 150 through the opening itself.
[72]
On the other hand, the hood 150 is in the inner pressure is higher than the set pressure value, the controller closes the opening of the hood 150. That is, the hood 150 is in the inner pressure is higher than atmospheric pressure, the gas inside the hood 150 can be discharged to the outside. Thus, the exhaust gas inside the hood 150 can be discharged to the outside contamination of the environment. Accordingly, the inside of the hood 150, pressure can be prevented if it is higher than the external pressure, to close the opening of the hood 150, the exhaust gas inside the hood 150 is discharged to the outside. However, the set pressure value can be varied is not limited to this.
[73]
[74]
Figure 3 is a graph showing the sintering apparatus according to another embodiment of the present invention.
[75]
3, the air supply unit 170 according to another embodiment of the present invention includes a control that forms a path through which air is moved and installed in the supply line 175, and feed line 175 is connected to the circulation line a valve 176, and is installed in the supply line 175 may comprise a cooler (not shown) to cool the air.
[76]
Supply line 175 is once connected to the circulation line 162 can be an air inlet to the other end. Thus, the air moving along the feed line 175 is fed to the circulation line 162, is mixed with the exhaust gas to move the circulation line 162 can be supplied to the hood 150.
[77]
Control valve 176 serves to open and close movement of the air path forming the supply line 175. Thus, to open the control valve 176, and air is supplied to the circulation line 162, to close the control valve 176 is not supplied to the air circulation line (162).
[78]
Coolers (not shown) is located between the other end of the control valve 176 and supply line 175, it serves to cool the air moving along the feed line (175). That is, the volume is larger because exhaust gas temperatures are traveling along the circulation line 162. The Thus, it is possible that will supply the cooling air to lower the temperature of the high-temperature exhaust gas to the circulating line 162, the air mixed with the exhaust gas may be made smaller in volume and the temperature is reduced.
[79]
The circulation line 162 there may be provided an oxygen sensor 182 for measuring the oxygen concentration in the exhaust gas. The oxygen sensor 182 serves to measure the concentration of oxygen flowing through the circulation line (162).
[80]
At this time, the controller 190 may control the amount of air supplied to the circulation line 162 in accordance with the oxygen concentration in the circulation line (162). The controller 190 is an oxygen sensor 182 is connected to connected to the transceiver 191, transceiver 191 for transmitting and receiving the oxygen concentration information of the exhaust gas set the oxygen concentration of the exhaust gas coming into the transceiver 191, preset concentration values ​​and according to the determination of the determiner 192, and a determiner 192 for comparing it may include a controller 193 that controls the operation of the control valve (176).
[81]
Determiner 192 may be compared to the oxygen concentration in the exhaust gas and the concentration set value to send a signal for opening the control valve 176 in the oxygen concentration of the exhaust gas is below the set density value controller (193). For example, the set density value is any one of the values ​​can be selected between 13-16%. That is, the oxygen concentration of the exhaust gas is lower than normal air. Therefore, the exhaust gas may degrade the combustion efficiency of the sintering raw material as compared to normal air. Thus, when the oxygen concentration in the exhaust gas is too low, it is possible to increase the oxygen concentration by supplying air to the exhaust gas. However, set density values ​​can vary without being limited thereto.
[82]
[83]
4 is a diagram showing the sintering apparatus according to an embodiment of the present invention.
[84]
4, a driver, a circulation line which moves the door unit 171, door unit 171, for opening and closing an opening formed in the air supply unit 170 includes a hood 150 according to another embodiment of the present invention ( 162) is associated with may include all of the supply lines 175, and feed line 175, control valve 176 for opening and closing the supplying air. Also inside, the hood 150 may be an oxygen sensor 182 to the pressure sensor 181 that is the oxygen concentration in the exhaust gas inside may be provided, the circulation line 162 is installed.
[85]
At this time, the controller 190 the amount of air that controls the operation of the door unit 171 according to the inner hood 150, pressure, and fed to the circulation line 162 in accordance with the oxygen concentration in the circulation line 162 It can be adjusted. The controller 190 includes a controller 190, a pressure sensor 181 and oxygen sensor transceivers 191 to 182 connected to the transmitting and receiving the oxygen concentration information of the pressure information and the exhaust gas inside the hood 150, a transceiver 191, in connection with the determination of the determiner 192, and a determiner 192 for comparing a transceiver 191, a hood 150, a preset setting the oxygen concentration in the pressure and the exhaust gas of the internal pressure value and a set density values ​​coming into the respective depending may include a controller 193 that controls at least either one of the operation of the actuator and the control valve (176).
[86]
Determiner 192 hood 150 by comparing the pressure with a set pressure value inside the hood 150 to signal me to open the opening of the hood 150 on the rear surface of the pressure set lower than the pressure value of the controller (193) can. On the other hand, the hood 150 is in the inner pressure is higher than the set pressure value, the controller 193 closes the opening portion of the hood 150.
[87]
The determiner 192 may send a signal for opening the control valve 176 on the back surface as compared to the oxygen concentration in the exhaust gas and the concentration set value, the oxygen concentration of the exhaust gas concentration below the set value, the controller (193). Further, it is possible by the oxygen concentration of the exhaust gas controls the operation of the set is less than a concentration value to the actuator opening the opening of the hood 150. Thus, the air is introduced into the hood 150, it is possible to increase the concentration of oxygen supplied to the raw material for sinter.
[88]
[89]
5 is a diagram illustrating a sintering method according to an embodiment of the invention.
[90]
5, the sintering method according to the embodiment of the present invention is a method for producing sintered ore, comprising: charging the raw material for sinter in the balance of moving along the movement route (S100), the flame on the upper surface of the sintering raw material the process of ignition (S200), the process (S400 to be supplied to the sintering material in the truck through the hood is installed to a part of the process (S300), and the air and the sucked flue gas to suck the exhaust gas to the lower direction of the sintering raw material on the movement route ) a.
[91]
First, a plurality of the track (110) to the lower side of the charging unit 120 while sequentially passing through the charged raw materials for sinter in the balance 110, respectively to form a raw material layer. A plurality of the track (110) is a flame spray from 130 to ignite when it passes through the lower side of the ignition unit 130 sequentially a flame is ignited in the top surface of the material layer. The balance 110 to be the raw material for sinter is sintered while moving in the downward flame by the air blown from top to bottom when passing the windbox 140, and the sintered ore is produced. Sintered ore is cooled is supplied to the cooler (not shown).
[92]
At this time, it is possible to supply the suction to some wind box 140 of the air (or exhaust gas) as a raw material for sinter in the balance (110) passing through the conveyance path. In particular, it is possible to circulate the exhaust gas sucked into the windbox (140) between the flow rate is increased with a decreasing point and the temperature of the exhaust gas of the exhaust gas branches is maximized.
[93]
Than the air flow resistance within the sintered material is the flow rate is increased by decreasing point and the temperature of the exhaust gas to the exhaust gas balance 110 that the air flow resistance of the inside of the raw material for sinter balance 110 that passes between the point at which the maximum passing through the other part Big. In a large part of the air flow resistance it is sintered to reduce the amount of air passing through the sintering material may not be smoothly conducted.
[94]
Is the flow rate is increased by decreasing point and the temperature of the exhaust gas of the exhaust gas connected to the wind box 140 and the circulation pipe 161 between the point at which the maximum, and is associated with the circulation line 161 via blower 163 by providing the suction force to the wind box 140, it is possible to draw air wind box 140 is associated with the circulation pipe 161 to a higher suction power.
[95]
Thus, through the sintered material, because the flow rate is increased with a decreasing point and the temperature of the exhaust gas in the exhaust gas even if the air flow resistance of the sintered raw material that passes through the point where the maximum size, increase in suction force provided by the blower 163 which it can be minimized to reduce the flow rate of air. Thus, the sintering of the sintered raw material is smoothly can be improved, the quality of sintered ores.
[96]
The exhaust gas sucked into the circulation pipe 161 is supplied to the hood (150) disposed on the upper side of the vehicle 110 via the circulation line 162. Hood 150 includes a windbox (140 which is disposed from the windbox 140, the upper part of (a point to reach the lower part of the or combustion cost balance 110) sinter point of the lowest combustion starts at the rearmost of the travel path ) it may be formed in the extension so as to cover up to the top. That is, since the oxygen concentration in the exhaust gas is less than the normal air, the hood 150 may be supplied to the exhaust gas to the area (or areas that require less oxygen) less combustion is taking place.
[97]
The lower side of the hood 150 is a number more than enough to sufficiently suck the exhaust gas discharged from the hood 150 to be arranged a windbox (140). For example, the hood 150, the windbox 140, the air in the lower side for discharging from that does not sufficiently sucked, the suction air that were not discharged to the outside may contaminate the environment. Thus, the circulation pipe it is necessary to adjust the number of the wind box 140 to cover the front-rear direction or length, the hood 150 of the hood 150, in consideration of the amount of air intake is connected to the 161.
[98]
In addition, it can give feed to the sintering material in the truck 110 through the movement of the outside air paths. The exhaust gas is, it is possible to reduce the combustion efficiency of the sintering raw material because of low oxygen concentration compared to normal air. Thus, the oxygen concentration of the exhaust gas than the higher supply air to the sintering material with the exhaust gas it is possible to improve the combustion efficiency of the raw material for sinter.
[99]
Air may be supplied directly to the sintering material through the hood 150, and may supply a mixture of exhaust gas and air as the raw material for sinter. For example, it is possible to control the operation of the door unit (171) for opening and closing an opening in the hood (150).
[100]
First, it is possible to measure the inside of the hood 150, pressure. Hood 150 is compared to the pressure and the set pressure value of the internal pressure within the hood 150 below set pressure value can open the opening portion of the hood 150. At this time, the set pressure value can be an atmospheric pressure. That is, the hood 150 to become air flows into the inside of the inner hood 150, the pressure must be lower than the atmospheric pressure. Therefore, when opening the opening portion when the interior of the hood 150, a pressure lower than the atmospheric pressure of the outside air is introduced into the hood 150 through an opening on its own, it can be supplied to the sintering raw material.
[101]
On the other hand, the hood 150 is in the inner pressure is higher than the set pressure value, to close the opening of the hood 150. That is, the hood 150 is in the inner pressure is higher than atmospheric pressure, the gas inside the hood 150 can be discharged to the outside. Thus, the exhaust gas inside the hood 150 can be discharged to the outside contamination of the environment. Accordingly, the inside of the hood 150, pressure can be prevented if it is higher than the external pressure, to close the opening of the hood 150, the exhaust gas inside the hood 150 is discharged to the outside.
[102]
At this time, it is possible to inject air at the front end of the hood, and injecting the exhaust gas from the rear end of the hood. For example, the 1/2 point (or the center) in the previous region of the jet of air and, after 1/2 of the area of ​​the hood 150, the hood 150 relative to the front-rear direction can be injected to the exhaust gas . That is, an opening is formed in the region of the previous 1/2 of the hood 150, is the region of the later half-point of the hood 150 is connected to the circulation line 162 can be supplied to the exhaust gas.
[103]
A hood 150 covering the windbox (140) located in front of of the front wind box 140, the balance 110, and a rear truck (110) passing through the wind box 140 is located to go by in the balance 110 It is performed more actively burning in. Thus, it can be more improved combustion efficiency of oxygen it has to be supplied to the balance (110) located in front. Thus, the combustion is made more actively supply air to the front of the bogie 110, bogie roneun 110 of the back it is possible to supply a small amount of oxygen off-gas.
[104]
On the other hand, it is possible to measure the oxygen concentration of the exhaust gas to move the circulation line (162). Then, by comparing the oxygen concentration of the exhaust gas and the concentration set value, the oxygen concentration of the exhaust gas is below the set density value can open the control valve (176). For example, the set density value is any one of the values ​​can be selected between 13-16%. Thus, when the oxygen concentration in the exhaust gas is too low, it is possible to increase the oxygen concentration by supplying air to the exhaust gas. Therefore, there is an off-gas and air are mixed in the sintering raw material gas may be supplied.
[105]
Alternatively, the opening may also be opened if the oxygen concentration of the exhaust gas concentration below the set value, the hood 150. Thus, the air is introduced into the hood 150, it is possible to increase the concentration of oxygen supplied to the raw material for sinter. However, no opening when the opening is not limited to this, and may be open at all times.
[106]
Thus, by supplying a off-gas generated in the air and the sintering process in the sintering raw material it can be involved in the sintering process. Thus, the circulating exhaust gas to be reused, so it is possible to suppress the pollution caused by exhaust gas or prevented.
[107]
In addition, the exhaust gas may be because the oxygen concentration is lower than that of normal air, lowering the combustion efficiency. Therefore, since the oxygen concentration exhaust gas with a high supply air to sinter together, it is possible to suppress or prevent the lowering combustion efficiency. That is, by supplying air, and to improve the combustion efficiency of the sintering material, the productivity of the sintering process can be increased.
[108]
Further, as the sintering of the raw materials for sinter to proceed there, the amount of air passing through the sinter raw material to increase the air flow resistance can be reduced, it is possible to draw air into a larger suction force in the region where the air flow resistance increases. Therefore, preventing the decrease in the amount of air passing through the sinter raw material by the combustion of the sintering raw material can be carried out stably. Thus, the quality of the sintered ore saengsang that can be improved.
[109]
[110]
Thus, the invention has been shown and described with reference to certain preferred embodiments thereof, it is possible that various modifications, within the limits that do not depart from the scope of the invention. Therefore, the scope of the invention limited to the described embodiments should not jeonghaejyeoseo is, not only should the claims be given on the bottom defined by the claims and their equivalents.

Claims

[Claim 1]It is arranged to be movable along a route, which is the sintering raw material charged into the internal balance; To the ignition is provided on the moving path so as to inject flames into the upper portion of the sintering raw material; A plurality of wind boxes arranged along the moving path in the lower side of the truck to provide a suction force to the balance; A hood is placed above the bogie extending along said travel path; Circulating unit for connection with a portion of the plurality of wind box and, supplying the exhaust gas to the wind box of the suction part with the hood; And a supply air connection and at least one of the hood part and the rotation to supply air to the sintering raw material; Sintering apparatus comprising.
[Claim 2]
The method according to claim 1, wherein the circulation unit, the circulation pipe for connecting a portion of the plurality of wind box and forms a space where the gas is received in the interior; Cycle which form a path where the exhaust gas movement, and one end is connected to the circulation pipe and the other end connected to said hood line; And a blower installed in the circulation line; Sintering apparatus comprising.
[Claim 3]
The method according to claim 2, wherein the circulation pipe has a sintering apparatus which is connected with the windbox between the flow rate is increased with a decreasing point and the temperature of the exhaust gas of the exhaust gas branches is maximized.
[Claim 4]
The method according to claim 2, wherein the hood is, sintering apparatus from the upper portion of the windbox sinter point of the lowest layer of the combustion start to cover the top of the wind box which is disposed at the rearmost in the moving path.
[Claim 5]
The method according to claim 2, large sintering apparatus than the number of the wind box, the number of the wind box which the covering hood is connected to the circulation pipe.
[Claim 6]
The method according to claim 2, an opening is formed in the top surface of the hood, the air supply unit, a sintering unit including a door unit installed in the hood so as to open and close the opening.
[Claim 7]
The method according to claim 6, wherein the opening is close to the sintering device in the ignition portion than the circular line and that the hood is connected.
[Claim 8]
The method according to claim 6, a pressure sensor is installed in the hood; And a controller for controlling the operation of the door unit in accordance with the pressure within the hood; sintering apparatus further comprising: a.
[Claim 9]
The method according to claim any one of claims 2 to 8, the sintering apparatus for the air supply unit, and forming a path for air movement comprises a supply line which is connected to the circulation line.
[Claim 10]
The method according to claim 9, an oxygen sensor which is installed in the circulation line; And a control unit for controlling the amount of air supplied to the circulation line in accordance with the oxygen concentration inside the circulation line; Sintering device further comprising.
[Claim 11]
A method for producing sintered ore, comprising: charging the raw material for sinter in the balance of moving along the movement route; The process of the ignition flame to the upper surface of the sintering raw material; The process of sucking the exhaust gas to the lower direction of the sintering raw material; And the step of supplying a portion of the exhaust gas and intake air to the sintering material in the truck through the hood is installed on the moving path; Sintering comprises.
[Claim 12]
The method according to claim 11, comprising the steps of: supplying the air as a raw material, is the measuring of pressure within the hood; And the step of supplying air to the sintering material, when the pressure within the hood is less than a predetermined set pressure value; Sintering comprises.
[Claim 13]
The method according to claim 12, comprising the steps of: supplying a portion of the air and the sucked flue gas as the raw material for sinter, the injection of air at the front end of the hood, and a sintering process comprising the step of injecting the exhaust gas from the rear end of the hood.
[Claim 14]
The method according to claim 11, comprising the steps of: supplying the air as a raw material, the process of measuring the oxygen concentration of the exhaust gas sucked; And the step of supplying air to the sintering material, when the oxygen concentration of the exhaust gas equal to or less than the suction predetermined set density value; Sintering comprises.