Claims:We claim:
1. A method (100) for producing coke comprising:
mixing (102) coal with mill scale (iron oxide) and water to prepare a mixture;
stamping (103) the mixture to form coal cakes;
carbonizing (104) the coal cake in to coke oven, wherein temperature during the carbonizing is in range 800oC to 1000oC; and
discharging the carbonized coke and wet quenching by pouring water on the discharged carbonized coke, and drying the quenched carbonized coke in open atmosphere.

2. The method (100) as claimed in claim 1, wherein the mill scale (iron oxide) is added in range of 0.5% to 5% by weight, preferably 2.5% to 5% by weight.
3. The method (100) as claimed in claim 1, wherein size of the mill scale (iron oxide) is -0.2 mm.

4. The method (100) as claimed in claim 1, wherein the mixing contains addition of water in range of 8% - 10% by weight of the mixture.

5. The method (100) as claimed in claim 1, wherein temperature during the carbonizing is in range of 850o C to 950o C.

6. The method (100) as claimed in claim 1, wherein heating rate in the coke oven is 3o C/min.

7. The method (100) as claimed in claim 1, wherein the grounded coal contains non-coking coal in range about 5% by weight to about 30% by weight.

8. The method (100) as claimed in claim 1, wherein the carbonizing process continues for 4 to 6 hours
9. The method (100) as claimed in claim 1, wherein bulk density of the coal cake is in rage 1100 to 1350kg/m3.

10. The method (100) as claimed in claim 1, wherein the mill scale (iron oxide) comprising 68-70% of Fe(T) by weight, preferably 69.2% of Fe(T) by weight.

11. The method (100) as claimed in claim 1, wherein the coal comprising 60-63% by weight fixed carbon (FC), preferably 62.8% by weight fixed carbon (FC).
12. A coke with coke reactivity index (CRI) in range 49% to 51% comprising:
75-80% by wt. fixed carbon;
15-23% Coke ash; and
1-2% Moisture.
, Description:METHOD FOR INCREASING REACTIVITY OF COKE BY USING ROLLING MILL SCALE
FIELD OF INVENTION:
[001] The present subject matter described herein, relates to a method for increasing reactivity of coke and, in particularly, to increase reactivity of coke by adding rolling mill scale or iron oxide.
BACKGROUND AND PRIOR ART AND PROBLEM IN PRIOR ART:
[002] Coke plays an important role in the blast furnace. It provides the energy, permeability to ascending gases and supports the burden in the blast furnace. It also remains solid till the hearth level of the blast furnace. Hence, coke must have sufficient strength to remain solid till the end. Coke reactivity is also important in blast furnace. In general, there has been a focus on having more coke strength and less reactivity of coke. Recently, scientists are trying to produce reactive coke by adding catalytic material in the coal blend. Some elements, such as Fe/Ca/Mg/Na can be used as an additive for increasing the reactivity. The cheap source of Fe/Ca is iron ore and lime. Significant portion of iron ore or lime gets converted to Fe and Ca ions during carbonization. These elements act as a catalyst during solution loss reaction in the blast furnace and decreases the reaction temperature. The decrease in reaction temperature will lead to decrease in coke rate. Hence, overall decrease in CO2 from blast furnace.
[003] The coke is typically manufactured from coal blend, consists of metallurgical coal, prime coking coal, medium coking coal, hard coking coal etc. The coking coals should have low ash content in it so that coke will contain less ash. Coke is made through either stamp charge or top charge method. The coke produced in the stamp charge method has 65-66% CSR (coke strength after reaction) value and 25-28% CRI (coke reactivity index) value. High reactivity coke reduces the thermal reserve zone in the blast furnace and hence, decreases coke rate.
[004] To increase the reactivity, iron ore is added in the coal blend. The iron ore contains gangue materials which increases the ash content in the coke and slag volume in the blast furnace. Hence, pure iron bearing material need to be added in the coal blend to reduce the problem of increase slag volume in the blast furnace. Attempt has been made to produce reactive coke by briquette making method.
[005] EU patent No. EP 2233548 teaches briquette making method in which different heating rate during carbonization was done. Such heating is varied from 5o C/min to 30o C/min and temperature of a surface of the molded product ranges from 550 °C to 650 °C.
[006] EU patent No. EP 2460869 a method for producing carbon iron composite with a vertical carbonization furnace in which the oxidation reaction of a component in the carbon iron composite can be retarded to prevent a decrease in the strength of the carbon iron composite.
[007] EU patent No. EP 2543716 teaches the metallurgical ferrocoke manufacturing method by briquetting a mixture of a carbonaceous material and iron ore to form a briquette and carbonizing the briquette, wherein a maximum temperature of ferrocoke during the carbonization is in a range of 800°C or higher and 900°C. The particle diameter of the ferrocoke is in a range of 15 mm or greater and 28 mm or less.
[008] EU patent No. EP 2554632 teaches a ferrocoke production method for producing ferrocoke using a vertical shaft furnace comprising: a plurality of high temperature gas injection tuyeres that is provided along furnace length and injects a high-temperature gas to form a high-temperature soaking zone with a predetermined length below an intermediate position of the furnace along furnace length; a low-temperature gas injection tuyere that is provided above a central position of the furnace along furnace length to inject a low-temperature gas; a cooling gas injection tuyere that is provided below the high temperature injection tuyeres to inject a cooling gas; and a process gas discharge port that is provided at a furnace top part and discharges a process gas.
[009] Unfortunately, the reactive coke produced by the prior art usually fails to address the problem of gangue material present in the iron ore which increases the slag volume in the blast furnace. The iron ore acts as a catalyst during coke gasification reaction. The finer size of iron ore is better because of increased surface area. The prior art also fails to address the issue particle size because on decreasing the particle size the cost will increase. Hence, there is a need to use the iron bearing material which is of finer size.
[0010] Today, steel industry faces major challenges in terms of energy intensive processes, CO2 emissions and cost of raw materials. A long-term research work on a wide spectrum of innovative low-carbon technologies is still required before they can be employed at an industrial scale. Hence, there is a need to produce coke which can react fast and emit less CO2 from the blast furnace. The reactive coke will reduce starting temperature of gasification. This will reduce thermal reserve zone temperature and hence, will decrease reducing agent ratio in the blast furnace. Reactive coke can be produced by using iron bearing materials such as iron ore and slime. The iron ore and lime contain lot of gangue materials and impurities, which are not desirable in the blast furnace. For example, iron ore contains alumina and silica, which will increase the ash content in the coke and slag volume in the blast furnace. So, there is a need to add more pure iron bearing material to increase the reactivity of blast furnace. Therefore, first objective of this invention is to produce reactive coke by adding more pure iron bearing material.
[0011] The iron ore used to increase the reactivity of the coke has bigger particle size. So, it needs to be crushed or ground to mix in coal blend. The grinding of iron ore increases cost of the product. Therefore, second objective of this invention is to use finer size iron bearing material having high surface area.
[0012] The steel industry has lot of waste materials which are iron bearing materials. These materials could be used in the coal blend to increase the reactivity. These materials are of no use for steel industry. Hence, third objective of this application is to use iron bearing waste materials such as rolling mill scale in coal blend to increase the reactivity.
[0013] The information disclosed in this background of the disclosure section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
OBJECTS OF THE INVENTION:
[0014] It is therefore the object of the invention to overcome the aforementioned and other drawbacks in prior method/product/apparatus.
[0015] The principal objective of the present invention is to provide a method for producing a high reactive coke using roll mill scale.
[0016] Another object of the present invention is to provide a method for producing highly reactive coke using finer size iron bearing material having high surface area.
[0017] Another object of the present invention is to reduce the slag volume in the blast furnace, by using pure form of iron bearing material, such as roll mill scale having very less amount of gangue material in the coke making.
[0018] Yet another object of the present invention is to increase the coke gasification reaction rate, by using iron bearing material, such as roll mill scale having high surface area.
[0019] Yet another object of the present invention is to increase the reactivity of coke with low cost material, by using iron bearing material, such as roll mill scale which is waste in the steel plant.
[0020] These and other objects and advantages of the present subject matter will be apparent to a person skilled in the art after consideration of the following detailed description taken into consideration with accompanying drawings in which preferred embodiments of the present subject matter are illustrated.
SUMMARY OF THE INVENTION:
[0021] One or more drawbacks of conventional method for producing coke, and additional advantages are provided through the method as claimed in the present disclosure. Additional features and advantages are realized through the technicalities of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered to be a part of the claimed disclosure.
[0022] The present subject matter relates to a method for producing highly reactive coke using roll mill scale. In the present invention, reactive coke is manufactured by stamp charging method in which different coal blend is mixed with mill scale (termed as “iron oxide”) obtained from cold rolling mill. Further, required amount of moisture is added to make the coal cake. The coal cake is then charged into the coke oven for carbonization. The coke produced from the oven is wet quenched by pouring water and drying the quenched carbonized coke in open atmosphere. The coke obtained from the method is tested for coke strength after reaction (CSR) and coke reactivity index (CRI). The coal blend is used from the coke plant. The coke produced is a reactive coke. The reactive coke has 49-50% CRI.
[0023] In an embodiment, the iron oxide is taken from cold rolling mill (CRM) vary in range 2.5 and 5% by weight in the coal blend.
[0024] In an embodiment, the temperature in coke oven during carbonization is in range 800oC to 1000oC.
[0025] In an embodiment, the mill scale (iron oxide) comprising 68-70% of Fe(T) by weight, preferably 69.2% of Fe(T) by weight.
[0026] In an embodiment, the coal comprising 60-63% by weight fixed carbon (FC), preferably 62.8% by weight fixed carbon (FC).
[0027] It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined to form a further embodiment of the disclosure.
[0028] The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS
[0029] It is to be noted, however, that the appended drawings illustrate only typical embodiments of the present subject matter and are therefore not to be considered for limiting of its scope, for the invention may admit to other equally effective embodiments. The detailed description is described with reference to the accompanying figures. In the figures, a reference number identifies the figure in which the reference number first appears. The same numbers are used throughout the figures to reference like features and components. Some embodiments of system or methods or structure in accordance with embodiments of the present subject matter are now described, by way of example, and with reference to the accompanying figures, in which:
[0030] Fig. 1 illustrates block diagrams of reactive coke manufacturing method by stamp charging using mill scale, in accordance with an embodiment of the present subject matter.
[0031] The figures depict embodiments of the present subject matter for the purposes of illustration only. A person skilled in the art will easily recognize from the following description that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the disclosure described herein.
DESCRIPTION OF THE PREFERRED EMBODIMENTS:
[0032] While the embodiments of the disclosure are subject to various modifications and alternative forms, specific embodiment thereof have been shown by way of example in the figures and will be described below. It should be understood, however, that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternative falling within the scope of the disclosure.
[0033] The terms “comprises”, “comprising”, or any other variations thereof used in the disclosure, are intended to cover a non-exclusive inclusion, such that a device, system, assembly that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such system, or assembly, or device. In other words, one or more elements in a system or device proceeded by “comprises… a” does not, without more constraints, preclude the existence of other elements or additional elements in the system or device.
[0034] The present subject matter relates to a method for producing highly reactive coke using roll mill scale. In the present invention, reactive coke is manufactured by stamp charging method in which different coal blend is mixed with mill scale (termed as “iron oxide”) obtained from cold rolling mill. Further, required amount of moisture is added to make the coal cake. The coal cake is then charged into the coke oven for carbonization. The coke produced from the oven is wet quenched by pouring water and drying the quenched carbonized coke in open atmosphere. The coke obtained from the method is tested for coke strength after reaction (CSR) and coke reactivity index (CRI). The coal blend is used from the coke plant. The coke produced is a reactive coke. The reactive coke has 49-50% coke reactivity index (CRI).
[0035] It should be noted that the description and figures merely illustrate the principles of the present subject matter. It should be appreciated by those skilled in the art that conception and specific embodiment disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present subject matter. It should also be appreciated by those skilled in the art that by devising various arrangements that, although not explicitly described or shown herein, embody the principles of the present subject matter. Furthermore, all examples recited herein are principally intended expressly to be for pedagogical purposes to aid the reader in understanding the principles of the present subject matter and the concepts contributed by the inventor(s) to furthering the art, and are to be construed as being without limitation to such specifically recited examples and conditions. The novel features which are believed to be characteristic of the present subject matter, both as to its organization and method of operation, together with further objects and advantages will be better understood from the following description when considered in connection with the accompanying figures.
[0036] These and other advantages of the present subject matter would be described in greater detail with reference to the following figures. It should be noted that the description merely illustrates the principles of the present subject matter. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described herein, embody the principles of the present subject matter and are included within its scope.
[0037] Fig. 1 illustrates block diagram of method for producing reactive coke using mill scale, in accordance with an embodiment of the present subject matter. At step 101, coal is grounded in a crushing/grinding machine for desired size. The grounded samples of coal are stored in their respective bins/storage area separately to avoid any mixing. At step 102, the grounded coal samples obtained in step 101 along with iron oxide (mill scale) are mixed in a desired ratio in a mixer. The mixer ensures proper mixing of different coals and the iron oxide to homogenize the mixture before coke making. In the mixing step, water is also added in the mixture to maintain the desired moisture level of the mixture for cake making. At step 103, the homogeneous mixture is put in a card board box for stamping. The coal cake is formed in the stamping section. Further, stamping can be done manually. At the step 104, the coal cakes are then charged into oven. At the step 104, carbonization of coal cake takes place in the coke oven. Once the carbonization process is over, the coke is discharged in a trolley at other end by pushing the cake through pusher rod. At step 105, the wet quenching of the discharged coke is done by pouring water on the discharged coke. The coke is dried on the hot plate in open atmosphere. The dried coke is sent for CSR and CRI testing.
[0038] In an embodiment of the present invention as described in the figure 1. The coal blend sample is used for study. The Iron oxide is used as a catalyst to increase the reactivity. Further, water is used in desired ratio to maintain the moisture content of the cake. The coal blend is taken in desired quantity. The iron oxide is varied from 0% to 10%, more preferably more than 0.5% and less than 5%. The moisture is maintained at 8-10% by weight of the mixture at step 102. All these materials are mixed in the desired ratio and cake is formed by stamping in a card board box. The cake formed is then carbonized using coke oven. The carbonization of coal cake removes the volatile matters of the coal and converts some amount of iron oxide to Iron (Fe). The coke formed is discharged in a steel trolley and quenched with water to reduce the temperature. The coke is then dried in the oven. The dried coke is sent for CSR/CRI testing.
[0039] In further embodiment of the present invention, the coke plant blend sample of -3.2 mm size is taken for the present process. The grounded coal in the coal blend contains non-coking coal is in range about 5% by weight to about 30% by weight. Further, the Iron oxide (mill scale) size is -0.2 mm. Further coal and iron oxide are blended together manually before addition of water to maintain the moisture level between 8-10%. The raw mix obtained is stamped inside the box having dimensions of length 340 mm, width 90 mm and height 270 mm. The bulk density of the coal cake is maintained between 1100 to 1350 kg/m3.
[0040] The dimensions and operation of an electrically heated carbonization oven are selected based on the standards of the British Carbonisation Research Association (BCRA). For experimentation purpose a 7-kg capacity oven was selected. The internal chamber dimensions are length 370 mm, width 115 mm, and height 305 mm. The oven is heated by twelve equally spaced vertical silicon carbide heating elements (rod type), which are 0.98 m long, 0.019 m diameter with a heating zone length of 0.355 m. The refractory lining of oven is made up of alumina.
[0041] The stamped coal (coal+ iron oxide) cake is charged into the carbonization oven when its temperature is around 800° C and the heating rate is maintained at 3°C/min. The temperature during the carbonizing is in range 800oC to 1000oC, preferably, temperature during the carbonizing is in range of 850o C to 950o C. The carbonization cycle is continued for 4-6 hours till the temperature at centre mass reached to 900°C to 950oC. At the end of carbonization cycle, hot catalyzed coke pushed out from the coke oven and subsequently wet quenched using water. The dried sample is sent for CSR/CRI testing.
[0042] In an embodiment, the mill scale (iron oxide) comprising 68-70% of Fe(T) by weight, preferably 69.2% of Fe(T) by weight.
[0043] In another embodiment, the coal comprising 60-63% by weight fixed carbon (FC), preferably 62.8% by weight fixed carbon (FC).
[0044] In yet another embodiment of the present subject matter, the coke received from the method as disclosed in figure 1. The coke contains 75-80% by wt. fixed carbon, 15-23% Coke ash, and 1-2% moisture.
[0045] In yet another embodiment, the coal contains 5 to 30% by weight non-coking coal.
[0046] The present coke is reactive with 49-50% CRI value.
EXAMPLE 1
[0047] A mill scale (iron oxide) with Fe (total) content of 69.2% is used as additive to increase the reactivity of the coke. The coal sample is taken from the coke plant. The coal sample has fixed carbon 62.8%. The proximate analysis of the coal blend is presented in table 1. The elemental analysis of iron ore and iron oxide is presented in table 2. The iron oxide contains less amount of impurities. Different samples are prepared with and without any additives. One sample is base blend (BB), which is coal blend without any additives. Base blend is prepared with 10 kg of plant coal sample (-3.2 mm size) and one liter of water to form the cake. Additive samples are prepared in which base blend is replaced by iron oxide in 2.5% and 5% ratio. Here, base blend coal is taken 9.75 kg in which 0.25 kg iron oxide (-0.2 mm particle size) is added along with one liter of water.
[0048] Similarly, coal blend with 5% iron oxide is prepared. These blends are tested for dilation and fluidity. The results are mentioned in table 3. The base blend has 920 ddpm fluidity while it is 641 ddpm with 2.5% iron oxide. The coal cake is prepared as per detailed description given in figure 1. The stamped coal (coal + iron oxide) cake is charged into the carbonization oven when its temperature is around 800°C and the heating rate is maintained at 3°C/min. Carbonization cycle is continued for 4-6 hours till the temperature at centre mass reached 900°C to 950o C. At the end of carbonization cycle, hot catalyzed coke pushed out from the coke oven and subsequently wet quenched using water. The dried sample is sent for CSR/CRI testing. The coke CSR/CRI results are presented in table 4. The base blend has 29.3% CRI. The CRI increased to 49.5% and 50.9% with 2.5% and 5% iron oxide respectively. The results show that with only 2.5% iron oxide the reactivity is increased by 70%. The iron oxide is available in more pure form and in finer size, that increases the reactivity. The advantage of iron oxide is that it is a waste product of mills, which can be used for increasing the coke reactivity. The increased coke reactivity has many advantages in the blast furnace, such as (1) it reduces the thermal reserve zone temperature which leads to decrease in the coke rate (2) decrease in coke rate leads to decrease in CO2 emissions in the blast furnace (3) increase in productivity.
Table 1: Proximate analysis of base blend coal sample

Sample ASH VM IM FC
Base Blend Coal 11.0 25.2 1.0 62.8

Table 2: Elemental analysis of iron ore and iron oxide

Sample Fe(T) FeO SiO2 CaO Al2O3 P LOI
Iron Ore 64.2 0.51 2.87 0.22 1.82 0.22 2.02
Iron Oxide (mill scale) 69.2 0.77 0.01 0.01 0.20 0.19 -

Table 3: Dilation and fluidity of different coal blends

Sample Dilation Fluidity
Contraction (%) Expansion (%) Maximum Fluidity (ddpm)
Base Blend 25 75 920
2.5% iron ore 23 29 482
2.5% iron oxide 22 -21 641

Table 4: CSR and CRI of Coke produced from iron oxide

Blend Coal (kg) Coke CSR
(%) Coke CRI
(%)
Base Blend (BB) 10 54.5 29.3
BB + 2.5% Iron oxide 9.75 14 49.5
BB + 5% Iron oxide 9.5 6.2 50.9

EXAMPLE 2

[0049] To compare the results with iron oxide, similar tests were done with iron ore as well. The iron ore having -0.4 mm particle size and 64.2% Fe (total) is taken for the study. The iron ore also contained alumina and silica. Different blends are prepared by replacing coal sample with 2.5% and 5% iron ore. The blend is stamped to form the cake. This cake is charged in the 7-kg oven as per the same procedure described above. The coke is discharged, wet quenched, dried and sent for CSR/CRI testing. The results are presented in table 5. The CRI value increased to 38.2% and 34.5% in case of 2.5% and 5% iron ore respectively. The increased CRI value is not significant. This shows that iron oxide (obtained from mills) is better for increasing the reactivity as compare to iron ore.

Table 5: CSR and CRI of Coke produced from iron ore

Blend Coal (kg) Coke CSR (%) Coke CRI (%)
Base Blend 10 54.5 29.3
BB + 2.5% iron ore 9.75 37.8 38.2
BB + 5% iron ore 9.5 46.8 34.5

[0050] It will be understood by those within the art that, in general, terms used herein, and especially in the appended claims (e.g., bodies of the appended claims) are generally intended as “open” terms (e.g., the term “including” should be interpreted as “including but not limited to,” the term “having” should be interpreted as “having at least,” the term “includes” should be interpreted as “includes but is not limited to,” etc.). It will be further understood by those within the art that if a specific number of an introduced claim recitation is intended, such an intent will be explicitly recited in the claim, and in the absence of such recitation no such intent is present. For example, as an aid to understanding, the following appended claims may contain usage of the introductory phrases “at least one” and “one or more” to introduce claim recitations. However, the use of such phrases should not be construed to imply that the introduction of a claim recitation by the indefinite articles “a” or “an” limits any particular claim containing such introduced claim recitation to inventions containing only one such recitation, even when the same claim includes the introductory phrases “one or more” or “at least one” and indefinite articles such as “a” or “an” (e.g., “a” and/or “an” should typically be interpreted to mean “at least one” or “one or more”); the same holds true for the use of definite articles used to introduce claim recitations. In addition, even if a specific number of an introduced claim recitation is explicitly recited, those skilled in the art will recognize that such recitation should typically be interpreted to mean at least the recited number (e.g., the bare recitation of “two recitations,” without other modifiers, typically means at least two recitations, or two or more recitations). Furthermore, in those instances where a convention analogous to “at least one of A, B, and C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, and C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). In those instances where a convention analogous to “at least one of A, B, or C, etc.” is used, in general such a construction is intended in the sense one having skill in the art would understand the convention (e.g., “a system having at least one of A, B, or C” would include but not be limited to systems that have A alone, B alone, C alone, A and B together, A and C together, B and C together, and/or A, B, and C together, etc.). It will be further understood by those within the art that virtually any disjunctive word and/or phrase presenting two or more alternative terms, whether in the description, claims, or drawings, should be understood to contemplate the possibilities of including one of the terms, either of the terms, or both terms. For example, the phrase “A or B” will be understood to include the possibilities of “A” or “B” or “A and B.”
[0051] It will be further appreciated that functions or structures of a plurality of components or steps may be combined into a single component or step, or the functions or structures of one-step or component may be split among plural steps or components. The present invention contemplates all of these combinations. Unless stated otherwise, dimensions and geometries of the various structures depicted herein are not intended to be restrictive of the invention, and other dimensions or geometries are possible. In addition, while a feature of the present invention may have been described in the context of only one of the illustrated embodiments, such feature may be combined with one or more other features of other embodiments, for any given application. It will also be appreciated from the above that the fabrication of the unique structures herein and the operation thereof also constitute methods in accordance with the present invention. The present invention also encompasses intermediate and end products resulting from the practice of the methods herein. The use of “comprising” or “including” also contemplates embodiments that “consist essentially of” or “consist of” the recited feature.
[0052] Although embodiments for the present subject matter have been described in language specific to structural features, it is to be understood that the present subject matter is not necessarily limited to the specific features described. Rather, the specific features and methods are disclosed as embodiments for the present subject matter. Numerous modifications and adaptations of the system/component of the present invention will be apparent to those skilled in the art, and thus it is intended by the appended claims to cover all such modifications and adaptations which fall within the scope of the present subject matter.