CN104316528A - Method for identifying and cooperatively using special coal - Google Patents
Method for identifying and cooperatively using special coal Download PDFInfo
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- CN104316528A CN104316528A CN201410637027.1A CN201410637027A CN104316528A CN 104316528 A CN104316528 A CN 104316528A CN 201410637027 A CN201410637027 A CN 201410637027A CN 104316528 A CN104316528 A CN 104316528A
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Abstract
The invention discloses a method for identifying special coal. The method comprises the following steps: (1) observing the optical tissue structure of an air pore wall after single coal to be identified is made into coke under an oil immersion objective by a polarizing reflection microscope; (2) measuring the vitrinite average maximum reflection rate of the coal and the optical tissue structure after the coal is made into the coke, and if a fine-grained fibered structure, a medium-grained fibered structure or a coarse-grained fibered structure accounts for 15% of the optical tissue structure of the air pore wall after the coal is made into the coke reaches 15%, judging that coking coal is the special coal. The invention further discloses a method for cooperatively using the special coal. According to the method, the fine-grained, medium-grained and coarse-grained fibered structures are distinguished from fine-grained, medium-grained and coarse-grained mosaic structures; when the coal is cooperatively used, the proportions of the fine-grained, medium-grained and coarse-grained fibered structures in the matched coal are correspondingly limited, and the quality fluctuation and deterioration of the coking coal are avoided.
Description
Technical field
The invention belongs to metallurgical coking technology field, be specifically related to a kind of discriminating and application method of special genetic coal.
Background technology
The coking coal vitrinite content such as Hegang, Heilungkiang pit coal, U.S. massey pit coal, U.S.'s ore deposit rich coal and Mozambique's pit coal are high, and technique apparent index G value, Y value are all higher, and its technical analysis, technological property index are in table 1.But Coking Test for Blend and coking production practices all show, carry out the deterioration of use coke quality obviously according to technological property indexs such as G value, Y values to above coking coal, hot strength of coke CSR declines 3 ~ 8%, causes conditions of blast furnace to fluctuate, cost before increase iron.
The point coking coal technical analysis of table 1 different ore deposit, technological property index determining data
For coking coal, in coal, the active component of different rank is converted into the optical texture of its character pair after being smelt coke, when
time, the active component in coal is converted into fine-grain structure; When
time, the active component in coal is partially converted into medium grained texture, is partially converted into coarse grained texture; When
time, the active component in coal is partially converted into coarse grained texture, is partially converted into fiber and schistose texture.For the coking coal of the normal origin cause of formation, when
time, coal just there will be fibre structure after being smelt Jiao.
According to the metamorphic grade of above-mentioned 4 kinds of coking coals, the coal of these ore deposit points makes the later optical texture microstructure of coke should be corresponding to a large amount of particulate, middle grain or coarse grained texture.In fact, in prior art, also the structural determination be transformed in U.S. massey ore deposit and the active component coking of ore deposit, Hegang, Heilungkiang is really fine-grain structure, structural determination Mozambique's ore deposit active component coking be transformed is coarse grained texture, and structural determination U.S.'s ore deposit rich coal active component coking be transformed is medium grained texture.But, carry out coal blending according to above-mentioned judgement, often cause prediction of coke quality mistake.The present inventor attempts said structure to be attributed to incomplete fibre structure in research work, and is used to guide coal blending, but regrettably, refine coke quality and usually depart from expection.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of discriminating and application method of special genetic coal, accurately to differentiate the coking coal that the origin cause of formation is special, avoid this part coking coal due to the origin cause of formation special, its active component does not change into the granular mosaic texture corresponding with its metamorphic grade after high temperature carbonization coking, but because can not accurately identify and control its amount of allocating into, cause coke quality to glide, cause the generation of conditions of blast furnace fluctuation situation.。
For solving the problems of the technologies described above, the discrimination method of the special genetic coal designed by the present invention comprises the steps:
1), when total magnification is 400 ~ 600 times under oil immersion objective with inclined reflection macroscope macroscope, the optical texture that single grade coal to be identified makes the air vent wall after coke is observed;
The tissue that under surveillance mirror, isochrome district size is less than 1.0um is linked to be sheet, and length and width are all greater than 10um, and during rotatable stage, this lamellar structure alternately occurs red and yellow, then this lamellar structure is defined as particulate fibrosis formation;
Under surveillance mirror, the tissue of isochrome district size 1.0um ~ 5.0um is linked to be sheet, and length and width are all greater than 10um, and during rotatable stage, this lamellar structure alternately occurs red and green, then this lamellar structure is defined as middle grain fibrosis formation;
Under surveillance mirror, the tissue of isochrome district size 5.0um ~ 10.0um is linked to be sheet, and length and width are all greater than 10um, and during rotatable stage, this lamellar structure alternately occurs red and green, then this lamellar structure is defined as coarse grain fibrosis formation;
2) the average maximum reflectivity of vitrinite of coal and the optical texture after making coke is measured,
in the optical texture composition of the air vent wall that coal system is defocused, particulate fibrosis formation, middle grain fibrosis formation or coarse grain fibrosis formation proportion reach 15%, then judge that this coking coal is special genetic coal.
The application method of the above-mentioned special genetic coal designed by the present invention comprises the steps:
1) each single grade coal is determined and the weight percentage ranges tentatively drafting each single grade coal is: the average maximum reflectivity of vitrinite
special genetic coal allocation ratio 0 ~ 15%, the average maximum reflectivity of vitrinite
special genetic coal allocation ratio 0 ~ 30%, bottle coal allocation ratio 5 ~ 30%, 1/3 coking coal allocation ratio 10 ~ 30%, rich coal allocation ratio 5 ~ 20%, coking coal allocation ratio 25 ~ 50%, lean coal allocation ratio 5 ~ 15%;
2) to step 1) Coal Blending Schemes test, test stone is:
2.1) if the made coke of mixed coal is only containing particulate fibrosis formation or coarse grain fibrosis formation, mixed coal coking particulate fibrosis formation or coarse grain fibrosis formation ratio * 0.5≤5% is controlled;
2.2) if the made coke of mixed coal is only containing middle grain fibrosis formation, grain fibrosis formation ratio≤10% in mixed coal coking is controlled;
2.3) if the made coke of mixed coal is simultaneously containing particulate fibrosis formation and middle grain fibrosis formation, mixed coal coking particulate fibrosis formation and middle grain fibrosis formation ratio * 0.5 sum≤5% is controlled;
2.4) if the made coke of mixed coal is simultaneously containing particulate fibrosis formation and coarse grain fibrosis formation, mixed coal coking particulate fibrosis formation and coarse grain fibrosis formation ratio * 0.5 sum≤5% is controlled;
2.5) if the made coke of mixed coal is simultaneously containing middle grain fibrosis formation and coarse grain fibrosis formation, grain fibrosis formation ratio and coarse grain fibrosis formation ratio sum≤10% in mixed coal coking is controlled;
2.6) if the made coke of mixed coal is simultaneously containing particulate fibrosis formation, middle grain fibrosis formation and coarse grain fibrosis formation, mixed coal coking particulate fibrosis formation, middle grain fibrosis formation ratio * 0.5 and coarse grain fibrosis formation ratio * 0.5 three sum≤5% is controlled;
3) if draft Coal Blending Schemes not reach test stone, then Coal Blending Schemes is adjusted, method of adjustment: any or which kind fibrosis formation does not meet the demands, then higher to this optical texture special genetic coal allocation ratio adjusts, until meet the test stone of Coal Blending Schemes, complete the formulation of Coal Blending Schemes.
Further, described step 1) the average maximum reflectivity of middle vitrinite
special genetic coal allocation ratio 5 ~ 10%, the average maximum reflectivity of vitrinite
special genetic coal allocation ratio 10 ~ 20%, bottle coal allocation ratio 8 ~ 15%, 1/3 coking coal allocation ratio 15 ~ 20%, rich coal allocation ratio 8 ~ 15%, coking coal allocation ratio 25 ~ 30%, lean coal allocation ratio 5 ~ 15%.
The present inventor is through studying the feature structure of special genetic coal for a long time, find usually to be considered in the optical texture of such origin cause of formation coal having in part-structure region of particulate, middle grain and coarse grain mosaic texture directed identical between each unit synusia, relative to particulate, in slightly easily become block to come off with the anisotropic structure such as coarse grain mosaic texture.Because this kind of structural property has specific characteristics, be different from particulate, in thick and coarse grain mosaic texture, also incomplete fibre structure and fibre structure is different from, therefore, be unsuitable for and be included in said structure classification, in the present invention, this part-structure is defined as particulate fibrosis formation, middle grain fibrosis formation and coarse grain fibrosis formation.Particulate fibrosis formation, middle grain fibrosis formation and coarse grain fibrosis formation and particulate, the support of middle grain and coarse grain mosaic texture and incomplete fibre structure matter on Coke Strength is had nothing in common with each other, active component contained by having in the coal of these architectural features makes the particulate that coke is formed later, middle grain and coarse grained texture change to fiberization to some extent, form Fibrotic structure directed identical between each unit synusia, relative to particulate, in the anisotropic structure such as thick and coarse grain after gasification reaction easy become block come off, thus, show coke cold, hot strength declines.Therefore, the present invention, when to its adapted, correspondingly limits the ratio of particulate fibrosis formation in mixed coal, middle grain fibrosis formation and coarse grain fibrosis formation, avoids refined coke quality fluctuation and deterioration.Powder craft after tradition is first joined, without precomminution and selective molecular attraction, without coal damping, without moulded coal, under the dress coke oven dry coke quenching condition of tradition more than 4.3 meters top, this technology is adopted to allocate Hegang, Heilungkiang pit coal, U.S. massey pit coal, U.S.'s ore deposit rich coal and Mozambique pit coal gained hot strength of coke CSR into 65 ~ 70%, M40 at 87 ~ 89%, M10 5.5 ~ 6%.
Embodiment
Below in conjunction with embodiment, the present invention is further detailed explanation.
There are 10 kinds of coking coal sources in certain factory, is numbered A ore deposit, B ore deposit, C ore deposit, E ore deposit, F ore deposit, G ore deposit, H ore deposit, I ore deposit, J ore deposit, K ore deposit respectively, measures the average maximum reflectivity of each single coking coal respectively
with charred coal organization structure, and differentiate its origin cause of formation, the result obtained is as table 2.
Differentiate to comprise the steps: to the ature of coal origin cause of formation
1), when with inclined reflection macroscope macroscope, under oil immersion objective, total magnification is 500 times, observation A ore deposit, B ore deposit, C ore deposit, E ore deposit single grade coal make the air vent wall tissue after coke.What when anisotropy tissue is the dry distillation of coal, the softening melting of active component warp was formed comes in every shape, isochrome district size is different, all directions have the tissue of different optical character, present the yellowish green color of Different Red after inserting examination board, during rotation objective table, color presents alternately change.
A ore deposit, B ore deposit: the tissue that part Jing Xia isochrome district size is less than 1.0um is linked to be sheet, length and width are respectively 15um and more than 10um, during rotatable stage, this lamellar structure alternately occurs red and yellow, and A ore deposit, this lamellar structure of B ore deposit are judged as particulate fibrosis formation;
C ore deposit: the tissue of part Jing Xia isochrome district size 1.0um ~ 5.0um is linked to be sheet, and length and width are greater than 15um, during rotatable stage, this lamellar structure alternately occurs red and green, and this lamellar structure of C ore deposit is judged as middle grain fibrosis formation;
E ore deposit: the tissue of part Jing Xia isochrome district size 5.0um ~ 10.0um is linked to be sheet, and length and width are greater than 20um respectively, during rotatable stage, this lamellar structure alternately occurs red and green, and this lamellar structure of E ore deposit is judged as coarse grain fibrosis formation;
2) the average maximum reflectivity of vitrinite of coal and the optical texture after making coke is measured, the average maximum reflectivity in A ore deposit and B ore deposit vitrinite
be respectively 0.80% and 0.75%, particulate fibrosis formation is respectively 32% and 34%, meets the criterion of special genetic coal, is judged as special genetic coal; The average maximum reflectivity of C ore deposit vitrinite
be 0.99%, middle grain fibrosis formation is 30%, meets the criterion of special genetic coal, is judged as special genetic coal; The average maximum reflectivity of E ore deposit vitrinite
be 1.14%, coarse grain fibrosis formation is 34%, meets the criterion of special genetic coal, is judged as special genetic coal.
F ore deposit, G ore deposit, the average maximum reflectivity of H ore deposit vitrinite
all be less than 1.35%, inlay fibrosis formation without granular, be judged to be no special origin cause of formation coal, be respectively bottle coal, rich coal and 1/3 coking coal; I ore deposit, the average maximum reflectivity in J ore deposit and K ore deposit vitrinite
all be greater than 1.35%, be also judged to be no special origin cause of formation coal, be respectively coking coal, coking coal and lean coal.
The each single grade coal metamorphic grade of table 2, coking optical texture index and the origin cause of formation are differentiated
The present invention is based on above mensuration and coal identification result, carry out coal blending according to table 3 scheme.
Embodiment 1, in mixed coal, particulate fibrosis formation, middle grain fibrosis formation ratio * 0.5 are 5.96% with coarse grain fibrosis formation ratio * 0.5 three sum, exceed the standard of 5% of the present invention's regulation, cancel Hegang, Heilungkiang, A ore deposit coal to allocate into, substitute with F ore deposit, Zaozhuang, Shandong, see embodiment 2, in mixed coal, particulate fibrosis formation, middle grain fibrosis formation ratio * 0.5 drop to 3.40% with coarse grain fibrosis formation ratio * 0.5 three sum, meet regulation requirement of the present invention, complete the adjustment of Coal Blending Schemes.Hot strength of coke CSR rises to 66.35% by 62.18%.
Embodiment 3, in mixed coal, particulate fibrosis formation, middle grain fibrosis formation ratio * 0.5 are 5.85% with coarse grain fibrosis formation ratio * 0.5 three sum, exceed the standard of 5% of the present invention's regulation, reduce E ore deposit Mozambique pit coal and allocate 10% into, with Xin Wen G ore deposit, Shandong and H ore deposit, tafelberg, Henan each alternative 5%, see embodiment 4, in mixed coal, particulate fibrosis formation, middle grain fibrosis formation ratio * 0.5 drop to 4.15% with coarse grain fibrosis formation ratio * 0.5 three sum, meet regulation requirement of the present invention, complete the adjustment of Coal Blending Schemes.Hot strength of coke CSR rises to 65.97% by 61.34%.
Powder craft after tradition is first joined, without precomminution and selective molecular attraction, without coal damping, without moulded coal, under the dress coke oven dry coke quenching condition of tradition more than 4.3 meters top, this technology is adopted to allocate Hegang, Heilungkiang pit coal, U.S. massey pit coal, U.S.'s ore deposit rich coal and Mozambique pit coal gained hot strength of coke CSR into 65 ~ 70%, M40 at 87 ~ 89%, M10 5.5 ~ 6%.And particulate fibrosis formation and fine-grain structure are confused traditionally, middle grain fibrosis formation and medium grained texture confuse, and coarse grain fibrosis formation and coarse grained texture confuse and carry out coal blending, and gained hot strength of coke declines 3 ~ 5%.
The Coal Blending Schemes of table 3 embodiment 1 ~ 4
Claims (3)
1. a discrimination method for special genetic coal, is characterized in that: comprise the steps:
1), when total magnification is 400 ~ 600 times under oil immersion objective with inclined reflection macroscope macroscope, the optical texture that single grade coal to be identified makes the air vent wall after coke is observed;
If the tissue that Jing Xia isochrome district size is less than 1.0um is linked to be sheet, length and width are all greater than 10um, and during rotatable stage, this lamellar structure alternately occurs red and yellow, then this lamellar structure is defined as particulate fibrosis formation;
If the tissue of Jing Xia isochrome district size 1.0um ~ 5.0um is linked to be sheet, length and width are all greater than 10um, and during rotatable stage, this lamellar structure alternately occurs red and green, then this lamellar structure is defined as middle grain fibrosis formation;
If the tissue of Jing Xia isochrome district size 5.0um ~ 10.0um is linked to be sheet, length and width are all greater than 10um, and during rotatable stage, this lamellar structure alternately occurs red and green, then this lamellar structure is defined as coarse grain fibrosis formation;
2) the average maximum reflectivity of vitrinite of coal and the optical texture after making coke is measured, if
in the optical texture composition of the air vent wall that coal system is defocused, particulate fibrosis formation, middle grain fibrosis formation or coarse grain fibrosis formation proportion reach 15%, then judge that this coking coal is special genetic coal.
2. the application method of special genetic coal described in claim 1, is characterized in that: comprise the steps:
1) each single grade coal is determined and the weight percentage ranges tentatively drafting each single grade coal is: the average maximum reflectivity of vitrinite
special genetic coal allocation ratio 0 ~ 15%, the average maximum reflectivity of vitrinite
special genetic coal allocation ratio 0 ~ 30%, bottle coal allocation ratio 5 ~ 30%, 1/3 coking coal allocation ratio 10 ~ 30%, rich coal allocation ratio 5 ~ 20%, coking coal allocation ratio 25 ~ 50%, lean coal allocation ratio 5 ~ 15%;
2) to step 1) Coal Blending Schemes test, test stone is: mixed coal coking particulate fibrosis formation, middle grain fibrosis formation ratio * 0.5 and coarse grain fibrosis formation ratio * 0.5 three sum≤5%;
3) if tentatively draft Coal Blending Schemes not reach test stone, then Coal Blending Schemes is adjusted, method of adjustment: any or which kind fibrosis formation does not meet the demands, then higher to this optical texture special genetic coal allocation ratio adjusts, until meet the test stone of Coal Blending Schemes, complete the formulation of Coal Blending Schemes.
3. the application method of special genetic coal according to claim 2, is characterized in that:
Described step 1) the average maximum reflectivity of middle vitrinite
special genetic coal allocation ratio 5 ~ 10%, the average maximum reflectivity of vitrinite
special genetic coal allocation ratio 10 ~ 20%, bottle coal allocation ratio 8 ~ 15%, 1/3 coking coal allocation ratio 15 ~ 20%, rich coal allocation ratio 8 ~ 15%, coking coal allocation ratio 25 ~ 30%, lean coal allocation ratio 5 ~ 15%.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564439A (en) * | 2019-08-30 | 2019-12-13 | 武汉钢铁有限公司 | Coal blending and coking method for coking coal with coarse grain mosaic structure content of more than or equal to 70 percent |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007231066A (en) * | 2006-02-28 | 2007-09-13 | Jfe Steel Kk | Manufacturing method of metallurgical coke |
| JP2010043196A (en) * | 2008-08-13 | 2010-02-25 | Jfe Steel Corp | Method for preparing high strength coke |
| CN102212379A (en) * | 2011-04-29 | 2011-10-12 | 武汉钢铁(集团)公司 | Coal blending method based on coal quality of fat coal |
| CN102680436A (en) * | 2012-06-16 | 2012-09-19 | 山西大学 | Method and device for measuring content of carbon in coal ash |
-
2014
- 2014-11-13 CN CN201410637027.1A patent/CN104316528B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007231066A (en) * | 2006-02-28 | 2007-09-13 | Jfe Steel Kk | Manufacturing method of metallurgical coke |
| JP2010043196A (en) * | 2008-08-13 | 2010-02-25 | Jfe Steel Corp | Method for preparing high strength coke |
| CN102212379A (en) * | 2011-04-29 | 2011-10-12 | 武汉钢铁(集团)公司 | Coal blending method based on coal quality of fat coal |
| CN102680436A (en) * | 2012-06-16 | 2012-09-19 | 山西大学 | Method and device for measuring content of carbon in coal ash |
Non-Patent Citations (2)
| Title |
|---|
| 薛改凤 等: "炼焦煤质量指标评价体系的研究", 《武汉科技大学学报》 * |
| 陈鹏 等: "单种炼焦煤结焦行为研究", 《武汉科技大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110564439A (en) * | 2019-08-30 | 2019-12-13 | 武汉钢铁有限公司 | Coal blending and coking method for coking coal with coarse grain mosaic structure content of more than or equal to 70 percent |
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