Specification
The title of the invention: seonghyeongtan manufacturing method and manufacturing apparatus seonghyeongtan
Art
[1]
The present invention relates to a manufacturing method and seonghyeongtan seonghyeongtan production apparatus. More specifically, the invention relates to a manufacturing apparatus of a manufacturing method for implementing the seonghyeongtan excellent cold crushing strength and hot strength by separating the coal by Ammo and seonghyeongtan.
BACKGROUND
[2]
In the smelting reduction process uses the melter-gasifier for melting the reduced iron ore and iron ore in the reduction. When the molten iron ore in the melter-gasifier, is charged as a heat source to melt the seonghyeongtan iron ore in the melter-gasifier. Here, after the reduced iron is melted in the melter-gasifier, after being converted into molten iron and slag is discharged to the outside. The seonghyeongtan charged into the melter-gasifier to form a coal packed-bed is. After the oxygen is blown through a tuyere installed in the melter-gasifier by burning the coal packed bed to generate a combustion gas. Combustion gas is converted into high temperature reduced gas while rising through the coal packed-bed. A high-temperature reducing gas is discharged to the outside of the melter-gasifier is supplied as a reducing gas in the reduction.
[3]
When using the seonghyeongtan, there is a need to increase the production of molten iron and molten iron by reducing the fuel ratio to streamline the manufacturing process. For this amount is reduced in the differentiation of the melter-gasifier of seonghyeongtan must maintain seonghyeongtan within the melter-gasifier to the large particle size. In this case, the gas and liquid within the melter-gasifier to secure the air-permeable and liquid to pass through smoothly possible to increase the reaction efficiency and heat transfer efficiency between the respective materials. In addition, due to the differentiation it can reduce the amount of the fine molten iron can not efficiently use during manufacturing. It is a limit of reducing the amount of generation of fine powder by a combination of a variety of coal.
Detailed Description of the Invention
SUMMARY
[4]
By separating the coal by crushing Ammo seonghyeongtan to provide a method for producing that it can implement the excellent hot strength and cold strength. Further, to provide a production apparatus of seonghyeongtan by separating the coal by crushing Ammo can implement excellent hot strength and cold strength.
Technical Solution
[5]
Method for producing seonghyeongtan according to an embodiment of the present invention, i) reduced iron is the melter-gasifier is charged, and ii) being connected to the melter-gasifier, the melter-gasifier in the apparatus for manufacturing molten iron containing the reducing to provide a reduced iron It is charged to ensure rapid heating of the dome is applied. Method for producing seonghyeongtan is, i) the step of providing a coal of a plurality of Ammo, ii) storing the coal of a plurality of Ammo individually, iii) to each crushed separately the coal of a plurality of Ammo to provide a pulverized coal phase, iv) by molding the pulverized coal, the method comprising: providing a mixture by mixing a curing agent and a binder, and v) mixture comprises providing a seonghyeongtan.
[6]
Seonghyeongtan method of manufacturing according to an embodiment of the present invention may comprise the step of drying the pulverized coal with more. Moisture standard deviation of the pulverized coal can be equal to or less than 0.3. In the step of providing the plurality of Ammo coal, the coal is not more than 10 of the car of coal of a plurality of Ammo HGI (Hardgrove Grindability Index, friability) Ammo can be provided mixed together. Of the coal of a plurality of Ammo it may be up to five of the HGI difference index.
[7]
Providing a mixture, i) step of uniformly mixing the pulverized coal, and ii) may comprise the step of mixing together a binder and a curing agent to provide a uniformly mixed and pulverized coal. In the step of providing the pulverized coal, the pulverized coal particle size may be less than 5mm greater than 0. The particle size of the pulverized coal can be 1mm to 3mm.
[8]
In the step of providing the pulverized coal, coal of a plurality of Ammo comprise a first and a second coal coal, crushed coal in the first time may be different from the time of the second crushing coal. Crushed coal is longer than the time of the first time of the second crushing coal, jeomgyeolseong of the first coal may be lower than the second coal jeomgyeolseong.
[9]
Apparatus for producing a seonghyeongtan according to an embodiment of the present invention, i) a plurality of coal storage tank to store the coal of a plurality of Ammo, ii) connected to each of a plurality of coal reservoir pulverized coal by crushing the coal of a plurality of Ammo a plurality of crusher s, iii) a binder storage tank binder is stored to provide, iv) a curing agent is stored in curing agent storage tank, v) by intermixing the curing agent as provided by the binder, and the curing agent storage tank provided by the pulverized coal, a binder storage tank provided from a plurality of crushers mixer to provide a mixture, and vi) comprises a molding machine for molding the mixture provides a mixture received from the mixer. Apparatus for producing a seonghyeongtan according to an embodiment of the present invention is connected directly with the plurality of crusher may further include a dryer for drying the pulverized coal together.
Effects of the Invention
[10]
Since the manufacture of coal seonghyeongtan after dry crushed by Ammo separation, it is possible to improve the cold strength and hot strength of the seonghyeongtan produced. Thus seonghyeongtan by the thermal decomposition in the melter-gasifier is drastically increase the size and strength of the resultant char can improve the work efficiency and the fuel cost of the molten iron manufacturing process. Further, it is possible to use the low cost of coal as a raw material of low friability seonghyeongtan, it can reduce the amount of binder.
Brief Description of the Drawings
[11]
1 is a schematic flow diagram of a method of manufacturing seonghyeongtan according to an embodiment of the present invention.
[12]
Figure 2 is a schematic view of seonghyeongtan production apparatus according to an embodiment of the present invention.
[13]
Figure 3 is a schematic view of an apparatus for manufacturing molten iron connected to the seonghyeongtan production apparatus of FIG.
[14]
Figure 4 is a schematic view of another apparatus for manufacturing molten iron connected to the seonghyeongtan production apparatus of FIG.
Best Mode for Carrying out the Invention
[15]
First, second and third & quot; and the like, but are used to describe the various parts, components, regions, layers and / or sections are not limited thereto. These terms are used solely to distinguish with any part, component, region, layer or section of the other part, component, region, layer or section. Thus, the first portion described below, component, region, layer or section may be referred to as a second portion, component, region, layer or section without departing from the scope of the invention.
[16]
Terminology used herein are merely for reference to particular embodiments and are not intended to limit the present invention. As used herein, the singular form shall include the plural form of a phrase that does not represent a meaning clearly contrary of. The meaning of "comprising" used in the specification and refine the specific characteristics, regions, integers, steps, operations, elements and / or components, other properties, regions, integers, steps, operations, elements and / or the presence of a component or not to exclude it added.
[17]
While not otherwise defined, all terms, including technical terms and scientific terms used herein have the same meaning as commonly understood meaning that self having ordinary skill in the art. Usually the terms defined in advance to be used are added and interpreted to have a meaning consistent with the information related to current technical literature and disclosed, it shall not be interpreted to one ideal or very official meanings unless defined.
[18]
The term "HGI" used below is used as a measure of the resistance of the crushed coal to a hard Grove index (Hardgrove Grindability Index). For example, HGI is then sized into a fixed prepared coal sample 50g in the grinding unit, and handle unit as revolutions standards specified pressure, the steel ball in the unit, and crushing the coal sample, classify the coal particle size specified record the Yang Yang coal under and converted to HGI value.
[19]
Below, one of ordinary skill in the art with respect to the embodiment of the present invention with reference to the accompanying drawings will be described in detail self to be easily performed. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
[20]
1 shows a flow diagram of a method of manufacturing seonghyeongtan according to an embodiment of the present invention. Seonghyeongtan method for producing the Figure 1 is only for illustrating the present invention only, but the invention is not limited to this. Therefore, it is possible to variously modify the seonghyeongtan method.
[21]
1, a method for producing seonghyeongtan includes providing a coal of a plurality of Ammo (S10), storing the coal of a plurality of Ammo each individually (S20), each of the coal of a plurality of Ammo comprising crushed individually (S30), a mixture of the crushed coal, the curing agent, and a binder comprising the steps of: providing a mixture (S40), and forming the mixture comprises the step (S50) to provide a seonghyeongtan. In addition, the production method of seonghyeongtan as necessary may further include other steps.
[22]
First, in the step (S10) of a plurality of coal provides Ammo. For example, a coal necessary for producing seonghyeongtan, can be used for coal, coking coal, semi-anthracite, peat, etc. goodness. Goodness shots may contain a large amount of volatile content. On the other hand, it may be mixed with the coal to the pulverized coal quality adjustment in order to illustrate but not in FIG. 1, to improve the quality of molten iron. Here, the coal may be used with a reflectance value or more predetermined quality adjustment as coal.
[23]
The particle size distribution of the coal ranges of the plurality of Ammo is very wide as a large 50mm or less than zero. On the other hand, coal is different from the HGI (Hardgrove Grindability Index, friability), depending on the degree of carbonization. The lower lignite or sub-bituminous coal carbonization degree is low HGI, bituminous coal has a high HGI, Anthracite has the highest tanhwado has a low back HGI.
[24]
And the step (S20) of a plurality of stores coal Ammo separately. When mixed with the coal storage of a plurality of Ammo, its particle size due to moisture variations and variation exerts an adverse effect on the quality of the production seonghyeongtan seonghyeongtan in the subsequent process. Therefore, mutual separation of the coal of a plurality of Ammo stores separately.
[25]
Next, in the step (S30) to each of them individually crushed coal of a plurality of Ammo it provides a pulverized coal. That is, each of the plurality of separate crushing the coal Ammo. For example, it is possible to adjust the average particle size of crushed coal of a plurality of Ammo below 5mm. When the average particle size of the coal of a plurality of Ammo is greater than 5mm, since in a later step is difficult to uniformly mix the coal of a plurality of Ammo, the seonghyeongtan quality may be degraded. Therefore, to adjust the average particle size of the coal of a plurality of Ammo to the above-described range. Preferably, it is possible to control the average particle size of coal to 1mm to 3mm.
[26]
Coal of a plurality of Ammo may have a different cross-HGI. For example, the difference may be up to 10 of the HGI of coal of a plurality of Ammo. For the HGI difference is too large, it is not suitable as a raw material for the production of coal seonghyeongtan. Therefore, to adjust the difference of HGI in the above-mentioned range. Preferably, the difference of HGI can be up to 5.
[27]
On the other hand, because a plurality of crushed coal of HGI Ammo with mutually different separately, crushing of a plurality of times of coal Ammo may be mutually different. In other words, the low-HGI coal crushed into fine particles are not well, and hold more crushing time. In contrast, since the high HGI coal it is well crushed, reducing the crushing time. Meanwhile, because of high coal it jeomgyeolseong well fracturing, makes it more jeomgyeolseong are higher shredded and hold time.
[28]
Conventionally, after drying with a variety of coal it was crushed in the crusher Tanjong collectively. In this case, since the particle size of the coal it varies according to the difference in magnitude of the coal, the coal so that the wider the particle size distribution of the mixed carbon gathered. Therefore, the mixed carbon particle size control is difficult due to wide particle size distribution during the particle size is difficult to manage, as well as change the blending ratio of the type of coal burnt to moisture variation due to different HGI is greater as well. As a result, it can adversely affect the quality of the hot and cold seonghyeongtan quality to be produced in a subsequent process. On the other hand, in the embodiment of the present invention they are mixed together, so after crushing the coal Ammo of each separately, the size distribution becomes narrower. Here, the crushing of the coal is carried out by changing the capacity, speed, and shredding and crushing conditions of the crusher. As a result, since only water is less variation in the mixed carbon is not mixed carbon yi have a uniform particle size can be prepared, for seonghyeongtan having excellent properties.
[29]
On the other hand, although not shown in Figure 1, it is possible to dry the mixed carbon combined with the shredded pulverized coal separately. In this case, because the dried coal with a certain particle size, it is possible to minimize the variation in the moisture mixed carbon. Thus, because of the mixed carbon can appropriately control the moisture content and moisture variations, it is possible to further improve the quality of seonghyeongtan. For example, it is possible to adjust the moisture standard deviation of the burnt pulverized coal mixture is combined with more than 0.3. If the standard deviation of the water mixture burnt too large, the amount of water contained in the mixed carbon not constant deteriorates the quality of seonghyeongtan.
[30]
Conventionally was automatically controlled so that the moisture content of the coal in the coal target and dried. In this case, the consideration of many parameters, such as a dry coal, drying temperature, air volume, and before drying the water content in the coal of the coal dryer was required for automatic control. In addition, when measuring the moisture, that the amount of sample for moisture determination to improve the accuracy of the measured values ​​and at most, had uniform sampling. Therefore, the coal moisture measuring mechanical automatic sampling and Drying is increasingly difficult. Therefore, in accordance with the corresponding changes in water before drying of coal so difficult, the automatic moisture control becomes impossible. In contrast, in the embodiment of the present invention, so dried and crushed coal to the coal after evenly to the particle size, the drying process of the coal is simplified.
[31]
Next, the step (S40), the mixing of the crushed coal, the curing agent and the binder to provide a mixture. Here, the crushed coal, graphite, binder and the curing agent may be mixed in any order, or to mix the first material specific. For example, a mixture of crushed coal and a binder may be mixed first, and then the curing agent. Or, a mixture of crushed coal and the curing agent may be mixed first, and then the curing agent.
[32]
Curing agents may be used as the calcium oxide, calcium hydroxide, metal oxide, fly ash (fly ash), clay, surface active agent, a cationic resin, accelerator, fiber, acid, sludge, waste plastics, waste lubricating oil, waste toner, graphite or activated carbon, etc. . It is also possible to use molasses as a binder, starch, sugar, a polymer resin, pitch, tar, bitumen, oil, cement, asphalt, etc., or water glass. For example, using molasses as a binder and quicklime as a hardener may be used to significantly improve the cold strength of the salt bonds per seonghyeongtan by seonghyeongtan during manufacture.
[33]
Meanwhile, the step (S40), it is possible to provide the mixture to provide a binder and a curing agent after uniformly mixing the pulverized coal first. In other words, pulverized coal is therefore include various Ammo, if pulverized coal is not mixed uniformly, the quality of seonghyeongtan may decrease. Thus, uniformly mixed with pulverized coal prior to supplying the pulverized coal to the binder and the curing agent.
[34]
Finally, in the step (S50) by molding the mixture provides a seonghyeongtan. For example, using a molding machine comprising a pair of forming rolls by compressing the mixture in a row can be prepared seonghyeongtan.
[35]
Figure 2 shows a seonghyeongtan manufacturing apparatus 100 according to an embodiment of the present invention. Figure 2 of the apparatus for manufacturing a seonghyeongtan 100 are merely to illustrate the invention, but the invention is not limited to this. Therefore, it is possible to variously modifying the structure of the production apparatus seonghyeongtan 100.
[36]
As shown in Fig. 2, the seonghyeongtan manufacturing apparatus 100 includes a coal storage tank 10, a crusher 20, a binder storage tank (40), the curing agent storage tank 50, a mixer 60, and the molding machine (70) . In addition, the manufacturing apparatus seonghyeongtan 100 dryer 90, the mixed carbon storage tank (92), further comprising a number of carbon storage tank (94), and particle size selector 805. If necessary seonghyeongtan manufacturing apparatus 100 may further include other devices. Fig specific structure and operation of each unit included in the seonghyeongtan manufacturing apparatus 100 of the second, so can be easily understood by those of ordinary skill in the art to which the invention pertains and detailed description thereof is omitted.
[37]
A plurality of coal storage tank 10 is storing each of the plurality of coal Ammo. For example, in addition to the coal used as raw material for seonghyeongtan it can be used for adjusting the quality of coal to improve the quality of the seonghyeongtan. Accordingly, each installed separately from a plurality of coal storage tank (10) to mix the proper amount of the coal quality adjustment based on the amount of coal used as raw material.
[38]
A plurality of crusher (20) are each respectively connected to the plurality of coal storage tank (10). A plurality of crusher 20 is crushed this coal being supplied each of the plurality of different Ammo from coal storage tank (10). For example, it is possible to provide a pulverized coal crushed coal having a particle size of less than 8mm. Although not shown in Figure 2 the crushed coal may be provided directly to a mixer 60. Moreover, the crushed coal after drying can be supplied to the mixer (60).
[39]
Then the dryer 90 is dried with a crushed coal in each crusher (20). Therefore, after the dryer 90 as dried are mixed with powdered coal of the plurality of Ammo it can be supplied to the mixer 60.
[40]
2, the binder is stored in a binder storage tank (40). Binders by mutual coupling of a plurality of the pulverized coal Ammo makes a state suitable for production seonghyeongtan. A binder storage tank (40) is connected to the mixer (60) to provide a binder to a mixer (60).
[41]
On the other hand, the curing agent is stored in curing agent storage tank (50). The curing agent is cross-coupled with pulverized coal and binder, it is possible to optimize the strength of the cured seonghyeongtan. The curing agent storage tank 50 is connected to the mixer 60 provides a curing agent to the mixer (60).
[42]
Mixer 60, by intermixing the pulverized coal, a binder, and a curing agent such as the mixture it provides for the production of seonghyeongtan. Are stored together in the mixer 60, a plurality of Ammo are mixed carbon storage tank (92) before being fed to the pre-mixed, are mutually uniformly mixed again in a mixer (60). Pulverized coal are mixed uniformly by driving the mixer (60) prior to the input, a binder and a curing agent therefore comprising a plurality of Ammo the mixer (60). When the right input of a binder and a curing agent to the mixer 60, of a plurality of pulverized coal Ammo they do not uniformly mixed can be reduced, the quality of seonghyeongtan. Therefore, first, mixing the pulverized coal of a plurality of Ammo in mixer 60.
[43]
As shown in Fig. 2, the molding machine (70) comprises a pair of rolls which rotate in mutually opposite directions. By supplying a mixture between a pair of rolls of the compression mixture by a pair of rolls to prepare a seonghyeongtan. On the other hand, stored in the shot by the seonghyeongtan manufactured through the particle separator 805, the classification number of the re-pulverized coal storage tank 94. Stored in the number of carbon storage tank (94) is again pulverized coal is supplied to the re-mixer 60 it can be used as a raw material for seonghyeongtan. As a result, it is possible to improve the utilization efficiency of the pulverized coal.
[44]
Figure 3 is connected to the seonghyeongtan manufacturing apparatus 100 for manufacturing molten iron of 2 shows an apparatus 200 for use in manufacturing a seonghyeongtan seonghyeongtan manufacturing apparatus 100 schematically. The structure of the apparatus for manufacturing molten iron 200 of FIG. 3 are provided only for illustrating the present invention only, but the invention is not limited to this. Therefore it can be modified in various forms the apparatus for manufacturing molten iron 200 of FIG.
[45]
The apparatus for manufacturing molten iron 200 in FIG. 3 includes the melter-gasifier to 210, and the reduction (220). In addition to molten iron manufacturing apparatus 200 may include other devices, if necessary. A reducing unit 220 includes the iron ore is reduced is charged. Iron ore is charged into the reduction unit 220 is made of a reduced iron while passing through the 220 in the reduction after the predrying. As to the reducing (220) the packed-bed reduction reactor, the melter-gasifier to supply the reducing gas from 210 received form the filling layer therein.
[46]
Since seonghyeongtan manufactured seonghyeongtan production apparatus 100 in Figure 2 is charged to 210 to the melter-gasifier of Figure 3, the interior of the melter-gasifier 210, the coal packed bed is formed. The upper portion of the melter-gasifier 210 is formed with a dome (2101). Dome 2101 formed in a large area compared with the other portions of the melter-gasifier 210, there is a high-temperature reducing gas. Seonghyeongtan is then charged to the dome 2101 to the melter-gasifier 210, the rapid heating and falls to the bottom of the melter-gasifier 210. Generated by a thermal decomposition reaction of the char seonghyeongtan is moved to the lower portion of the melter-gasifier to 210 to exothermic reaction with oxygen supplied through the tuyere 230. The result can be used as a heat source is seonghyeongtan to maintain 210 the melter-gasifier to a high temperature. On the other hand, char, so providing a breathable, the melter-gasifier 210, the fine direct reduced iron supplied in a large amount of 220 to the gas and reduction occurs at the bottom to the melter-gasifier 210 to more easily and uniformly through the coal packed-bed in the can.
[47]
In addition to the above-described seonghyeongtan as needed it may be charged to the 210 the lumped carbonaceous materials or cokes the melter-gasifier. The outer wall of the melter-gasifier 210 by installing the tuyere 230 and supplying oxygen. Oxygen is taken into the coal packed bed to form a raceway. Seonghyeongtan can be combusted in the combustion for generating the reducing gas.
[48]
4 is connected to the seonghyeongtan production apparatus 100 in Figure 2 shows another apparatus for manufacturing molten iron 300 using a seonghyeongtan manufactured seonghyeongtan manufacturing apparatus 100 schematically. The structure of the apparatus for manufacturing molten iron 300 in Figure 4 is only for illustrating the present invention only, but the invention is not limited to this. Therefore it can be modified in various forms the apparatus for manufacturing molten iron 300 of FIG. The structure is the same part, so similar to the structure of the apparatus for manufacturing molten iron 200 in FIG. 3 of the apparatus for manufacturing molten iron 300 of FIG. 4 the same reference numerals and a detailed description thereof will be omitted.
[49]
As shown in Figure 4, the apparatus for manufacturing molten iron 100 includes a melter-gasifier 210, 310, a reduced iron compression device 320 and the reduced iron compression reservoir 330, the fluidized-bed reduction reactor. Here, the reduced iron compression reservoir 330 may be omitted.
[50]
Manufactured seonghyeongtan are charged into the melter-gasifier 210. Here, seonghyeongtan is to generate the reducing gas in the melter-gasifier 210, and the generated reducing gas is supplied to the (310) the fluidized-bed reduction reactor. Iron ore is supplied to the (310) the fluidized-bed reduction reactor, while the flow by a reducing gas supplied from the melter-gasifier 210 to the fluidized-bed reduction reactor 310 is made of a reduced iron. Reduced iron is stored in the reduced iron after compressed by the compression unit 320, compressed reduced iron storage tank (50). The reduced iron is supplied to the compression unit 210 to the melter-gasifier reduced iron from the compression reservoir 330 are melted in the melter-gasifier 210. Seonghyeongtan are charged into the melter-gasifier 210, it turns chwaro with an air-permeable, the melter-gasifier 210, the lower a large amount of gas and the compressed reduced iron is the melter-gasifier coal charging the layer more easily and uniformly in the (210) generated in the It can be produced in a good quality of the molten iron to pass through. On the other hand, oxygen is supplied through the tuyere 230, thereby burning the seonghyeongtan.
[51]
The following describes in more detail the present invention through an example. These experimental examples are intended only to illustrate the invention, but the invention is not limited to this.
[52]
Experimental Example
[53]
Tan then type friability (HGI) crushing of the difference between the particle size distribution changes in assessment tests
[54]
A carbon with a particle size of 5mm to 20mm, the coal sample was prepared in B and C Tan Tan. A bullet was coking coal, B Tan Tan was the goodness of high volatile content, C semi-anthracite coal was burnt. A shot using a crusher, and crushing until the particle size of B and C Tan Tan amount is less than or equal to 5mm. A and burnt, by classifying the B and C Tan Tan was measured particle size distribution. Table 1 shows the particle size distribution to the measured.
[55]
Table 1 [Table 1]
NO Coal HGI
1 A Tan 80~90
2 B Tan 50~60
3 C Tan 80~90

[56]
As shown in Table 1, in each of the HGI coal, were A and C Tan Tan 80 ~ 90, B is 50 to 60 was burnt. This HGI value is high, meaning that the well-being crushed and means HGI value is small, a poorly crushed. Therefore, Tan Thanh A and C were found to be better than crushing the B shot.
[57]
On the other hand, Table 2 shows the particle size distribution of each of to the coal according to the HGI difference. As shown in Table 2, A bullet having a high HGI value and C is the coarse carbon of 1 ~ 5mm compared to B carbon having a particle size ratio is lower HGI value was relatively low. On the other hand, A and C Tan Tan fine particle size ratio of less than 0.25mm is high relative to the B shots. A Tan So, if you lot are likely to be crushed and mixed with the B and C Tan Thanh, Tan A and C are burnt and crushed, B shots are often likely to be crushed US. Thus, A and C Tan Tan particle size of the carbon particle size of B, while being relatively small is highly likely relatively large. As discussed above, if the particle size distribution characteristics of the non-uniform crushing pulverized coal, can not implement the optimal particle size distribution characteristic, the cold and hot quality seonghyeongtan quality is lowered. In the case of crushing after mixing the A to C Tan Tan, it was difficult to control the overall particle size.
[58]
Table 2 [Table 2]
NO Coal The particle size distribution of coal
-0.25mm 0.25~0.5mm 0.5~1mm 1~5mm
1 A Tan 30.6% 14.0% 18.2% 37.2%
2 B Tan 12.1% 11.6% 22.3% 54.0%
3 C Tan 29.2% 14.4% 17.2% 39.2%

[59]
Cold and hot quality Quality experiment according to the particle size distribution
[60]
A bullet to prepare a B and C Tan Tan. Tanjong each were separated by size up to the upper limit of coal as 5mm, 3mm and 1mm. Each of the seonghyeongtan coal, a binder, and a curing agent were mixed in an appropriate ratio and then by pressing by a roll press molding machine at room temperature, diameter 51mm, width 37mm and thickness of 24mm was prepared in a pillow shape. Volume of seonghyeongtan is 25cm 3 were, the compressive strength of seonghyeongtan was calculated according to equation 1 below.
[61]
Equation 1
[62]
Compressive strength (kgf) = compressive strength in the compression strength meter (10 measurement average)
[63]
Table 3 shows the compression strength of the seonghyeongtan according to particle size distribution described above. As shown in Table 3, in the case of coal coal A to C is the upper limit of the maximum particle size of 3mm, it exhibited the highest compressive strength. When applying pressure to the layered structure of the coal, so cracks occurred due to the pressure, the larger the particle size was estimated to be large, even the lowering of the compressive strength seonghyeongtan.
[64]
Table 3 [Table 3]
NO Coal The maximum upper limit of the particle size of coal
-5mm -3mm -1mm
1 A Tan 43.2kgf 49.3kgf 48.2kgf
2 B Tan 43.0kgf 44.2kgf 44.1kgf
3 C Tan 44.1kgf 47.2kgf 46.5kgf

[65]
On the other hand, B HGI is A high proportion of coal, peat and C for low trillion compared to the HGI Tan, coarse coal is burnt had a great influence on the compression strength. In addition, the arithmetic mean particle size of much greater Tan B calculated by Equation 2 below, compared to the arithmetic average particle size of the A burnt.
[66]
Equation 2
[67]
The arithmetic mean particle size (mm) = (weight ratio ㅧ 3-5mm particle size 4mm) + (1-3mm particle size Weight ratio × 2mm) + (particle size less than 1mm × 0.5mm weight ratio) / 100
[68]
And, as described in Table 4 below, showed that the proportion of carbon lower than the specific gravity seonghyeongtan prepared in B of seonghyeongtan prepared in A and C Tan Tan. This also therefore significantly lower compressive strength of the B shot. When crushed to a mixture of carbon when A of the above bullet point C, the compressive strength of seonghyeongtan is reduced because the particle size after the crushing of the relative increase in the Tan B. Thus it can be seen that mixed together and then crushed to separate the A to C Tan Tan separately when preparing the seonghyeongtan, can improve the compressive strength of seonghyeongtan.
[69]
Table 4 Table 4
NO Coal The particle size distribution After crushing + 3mm (%) The arithmetic mean (mm) Seonghyeongtan gravity (g / cm 3 )
1 A Tan -5mm 2.7 0.98 1.223
2 -3mm 0.0 0.58 1.238
3 -1mm 0.0 0.31 1.224
4 B Tan -5mm 5.3 1.36 1.211
5 -3mm 0.0 0.75 1.210
6 -1mm 0.0 0.40 1.205
7 C Tan -5mm 4.1 1.19 1.256
8 -3mm 0.0 0.72 1.256
9 -1mm 0.0 0.37 1.257

[70]
Impact tests on the strength of the char type upper particle size of the Tan seonghyeongtan
[71]
A seonghyeongtan prepared as described above was completely dry for 24 hours. Put the reaction in an inert atmosphere from a circular to seonghyeongtan of 1000 ℃ was rotated 60 minutes at 10rpm. Put Char Char than that of the particle size from 10mm to a circular reactive groups I drum was rotated at 600 for 30 minutes with intensity 20rpm. And the ratio of 10mm or more for crude char was set to char strength according to Equation 3 below.
[72]
[Equation 3]
[73]
Char Strength (%) = ((I drum strength char weight of 10mm more than the particle size measured after (g) / (I drum strength measured before char weight of 10mm more than the particle size (g)) × 100
[74]
Table 5 shows the type of carbon particle size upper limit to the strength of the char according to the difference. As described in Table 5, the strength of the char, unlike the above-described compression strength of the carbon A and the carbon B was seen up to the upper limit preferably larger the particle size, C Tan were satisfactorily smaller the particle size up to the upper limit.
[75]
Table 5 Table 5
NO Coal The maximum upper limit of the particle size of coal
-5mm -3mm -1mm
1 A Tan 46.8% 42.4% 41.0%
2 B Tan 65.6% 64.7% 59.0%
3 C Tan 49.1% 51.5% 54.6%

[76]
The above-described experimental results, showing the hot char strength quality of compressive strength indicates the quality of the cold and seonghyeongtan seonghyeongtan exhibited different characteristics by each shot type and particle size. Therefore, in order to manufacture the seonghyeongtan having good properties in both the compressive strength and the strength of the char coal seonghyeongtan considering unique characteristics, such as HGI and particle shape it was determined that it is desired to separate the coal crushed by a variety of breeds. As it follows in order to support this was carried out another experiment.
[77]
Experiment according to process nine minutes
[78]
Experimental Example 1
[79]
Tanjong coal burnt by the A, B and C Tan Tan to prepare a seonghyeongtan to dry after each separated by shredding. In other words, A shot, were considered the property of the coal particles by crushing remove the B and C Tan Thanh, Tan A shredded, then B and C Tan Tan to mix the dry batch was prepared seonghyeongtan. A tan, B and C Tan Tan was intermixed with 40wt%, 30wt% and mixing ratio of 30wt%, respectively. And the compressive strength was measured and the strength of the char seonghyeongtan.
[80]
Comparative Example 1
[81]
The same coal and coal used in Experimental Example 1 was crushed and mixed together and then dried together. The remaining experimental procedure was the same as the above-mentioned Experimental Example 1.
[82]
Table 6 shows the measurement result of the compressive strength and the strength of the char seonghyeongtan prepared according to Experimental Example 1 and Comparative Example 1. As described in Table 6, Experiment 1 was the compressive strength is increased by about 8.8% compared to Comparative Example 1, and the ultimate degree is increased by about 5.4%. Therefore, when using the carbon type separation crushing process of Comparative Example 1 of the bullet type bulk crushing process rather than Experimental Example 1, it was found that it is possible to improve both the quality of the cold and hot quality seonghyeongtan.
[83]
Table 6. Table 6
NO Experimental Example Compressive Strength Char strength
1 Experimental Example 1 47.1kgf 54.6%
2 Comparative Example 1 43.3kgf 51.8%

[84]
Water gradient experiment of seonghyeongtan
[85]
Measuring a water content in the mixed carbon used in the manufacture of each seonghyeongtan of Experimental Example 1 and Comparative Example 1 were compared with each other 20 times the standard deviation calculated. Table 7 shows the standard deviation of the water to cross compare the mixture burnt in Experimental Example 1 and Comparative Example 1.
[86]
As it described in Table 7, Comparative Example 1, but the standard deviation of 0.43 minutes, the experimental example 1 was lower than 0.30. This is because a difference occurs in the first case of drying, drying properties the particle size range of coal that flows into the dryer wide to 0 ~ 50mm in the same dry condition in accordance with the particle size difference before fracturing the coal, as the process in the first comparative example. However, drying the coal after crushing the coal as Experimental Example 1, since the particle size range of the coal is so small as 0 ~ 5mm, it is possible to improve the moisture deviation of the mixed carbon. Thus by uniformly adjusting the amount of water contained in the mixed carbon it was prepared with the seonghyeongtan excellent quality cold and hot quality.
[87]
Table 7 [Table 7]
NO Experimental Example Water standard deviation
1 Experimental Example 1 0.30
2 Comparative Example 1 0.43

[88]
It has been described, as described before the present invention, without departing from the spirit and scope of the claims to be described in the following, party engaged in the art that various modifications and variations will readily appreciate.
[89]
Reference Numerals
[90]
10. Coal reservoir
[91]
20. crushers
[92]
40. binder reservoir
[93]
50. hardener reservoir
[94]
60. Mixer
[95]
70. Molding Machine
[96]
85. crushers
[97]
90. Dryer
[98]
92. The mixed carbon reservoir
[99]
94. The number of carbon reservoirs
[100]
100. seonghyeongtan manufacturing equipment
[101]
200, an apparatus for manufacturing molten iron 300.
[102]
The melter-gasifier 210.
[103]
220. the packed-bed reduction
[104]
230. tuyere
[105]
To 310. fluidized-bed reduction
[106]
320. The reduced iron compression device
[107]
330. Reduced Iron compression reservoir
[108]
805. Particle Size Selector
[109]
2101. dome

Claims
[Claim 1]
The melter-gasifier is reduced iron is charged, and a method for manufacturing seonghyeongtan applied and connected to said melter-gasifier, is charged to the dome of the apparatus for manufacturing molten iron containing a reducing providing the reduced iron into the melter-gasifier to the rapid heating, step for providing coal in the plurality of Ammo, storing the coal of the plurality of Ammo separately and independently, the method comprising: providing the pulverized coal to the respective crushed separately the coal of a plurality of Ammo, mixing the pulverized coal, a curing agent, and a binder to said mixture, and a method of manufacturing seonghyeongtan comprising providing a seonghyeongtan by molding the mixture.
[Claim 2]
According to claim 1, the method of manufacturing seonghyeongtan comprising the step of the drying the pulverized coal with more.
[Claim 3]
According to claim 2, wherein the moisture standard deviation of the pulverized coal is not more than 0.3 seonghyeongtan method of manufacture.
[[4]
According to claim 1, wherein in the step of providing the coal of the plurality of Ammo, of seonghyeongtan which difference provides the 10 or less coal Ammo are mixed together in the of the coal of a plurality of Ammo HGI (Hardgrove Grindability Index, friability) The manufacturing method.
[Claim 5]
According to claim 4, wherein the difference is not more than 5 of the production method of seonghyeongtan HGI index of the coal of the plurality of Ammo.
[6.]
According to claim 1, wherein the step of providing the mixture, the method comprising uniformly mixing the pulverized coal, and a method of manufacturing seonghyeongtan comprising mixed together to provide a binder and a curing agent to said pulverized coal uniformly mixed.
[7.]
According to claim 1, wherein in the step of providing the pulverized coal, wherein the particle size of the pulverized coal is greater than 0 not more than 5mm method of seonghyeongtan.
[8.]
According to claim 7, wherein the particle size of the pulverized coal is the manufacturing method of 1mm to 3mm in seonghyeongtan.
[9.]
According to claim 1, wherein in the step of providing the pulverized coal, the plurality of coal of Ammo comprise a first coal and second coal, crushing time of the first coal is different seonghyeongtan and crushing time of the second coal method of manufacturing.
[10.]
According to claim 9, wherein the crushing time of the first coal is longer than a time of the second crushing coal, coal jeomgyeolseong of the first method for producing a low seonghyeongtan than jeomgyeolseong of the second coal.
[11.]
A plurality of coal storage tank to store the coal of a plurality of Ammo, is coupled to the plurality of coal reservoir, each of the plurality of crushers to provide a pulverized coal by crushing the coal of the plurality of Ammo, the binder is stored in a binder storage tank, the curing agent stored in the curing agent storage tank, pulverized coal supplied from the plurality of crusher, mixer providing a mixture by mutually mixing the curing agent as provided by the binder, and the curing agent storage tank supplied from the binder storage tank, and molding the mixture being provided to the mixture from the mixer seonghyeongtan manufacturing apparatus comprising a molding machine.
[12.]
12. The method of claim 11, wherein the direct connection with a plurality of crusher seonghyeongtan production apparatus further comprises a dryer for drying the pulverized coal together.