CN103279678B - The evaluation method of maximum Giseeler fluidity > 2000ddpm coking coal ature of coal - Google Patents
The evaluation method of maximum Giseeler fluidity > 2000ddpm coking coal ature of coal Download PDFInfo
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Abstract
The invention discloses the evaluation method of the coking coal ature of coal of a kind of maximum Giseeler fluidity MF > 2000ddpm, it comprises the steps: 1) detect the coarse grain mosaic texture ratio X drawing coking coal
1, fiber and schistose texture ratio sum X
2, maximum Giseeler fluidity MF and degree of expansion b; 2) setting P is coking coal coal property evaluation index, and order: P=100+2 × [K
1× (X
1-X
j1)+K
2× (X
2-X
j2)+K
3× (| L × MF-800|-|L × MF
j-800|)+K
4× (| b-50|-|b
j-50|)], wherein subscript j represents benchmark coking coal; K
1, K
2, K
3, K
4for constant; 3) calculate P value, P value is larger, represents coking coal ature of coal better.The present invention can to coking coal effective evaluation quality, and rationally determine price, science carries out adapted.<!--1-->
Description
Technical field
The invention belongs to coal-blending coking technical field, be specifically related to a kind of evaluation method of maximum Giseeler fluidity MF > 2000ddpm coking coal ature of coal.
Background technology
Coking coal is the important support of coke quality, also be the coal that in coking coal, coking behavior is best, according to Chinese Coal Classification standard (GB5751-2009), volatilization is divided into >10.0 ~ 28.0%, caking index is greater than 65, and the coking coal unification that plastometer indices is less than 25.00mm is classified as coking coal.But in actual applications, find that the confining spectrum of this criteria for classification to coking coal is wider, coking coal is because being subject to geologic origin, coal petrography index, technological property Index Influence, and ature of coal is complicated and changeable, therefore accurate judgement is carried out to the ature of coal of coking coal and just seeming particularly necessary.At present, domestic most steel mill evaluates coking coal ature of coal mainly through volatile matter, G value, Y value and vitrinite reflectance etc., as Jia Ruimin report Ji steel coking coal evaluate using method (Jia Ruimin. the effect of coal property evaluation analysis in coal blending. fuel and chemical industry .2010,41 (5): 28-31), the method is apparent property because evaluation index has, cause to use coking coal, especially special genetic coking coal by rational evaluation.The people such as Xue Gaifeng are studied by the industrial index to ground Coking Coal Qualities such as China Qinghai, Sichuan, Xinjiang, technic index, coal petrography index, antimonate precipitation composition (optical texture) and Thermal Properties of Coke, propose a set of index system comprising volatile matter, caking index and single grade coal coking microstructure composition evaluation Coking Coal Quality; The essential characteristic that antimonate precipitation can disclose coking coal coking is proposed, the impact of coking coal STRENGTH ON COKE thermal behavior can be disclosed, should as the key index of coking coal coal property evaluation (Xue Gaifeng etc. the research of Coking Coal Quality indicator evaluation system. Wuhan University Of Technology's journal (natural science edition) .2009,32(1): 36-40), but this index system is too numerous and jumbled, and do not have the foundation of quantitative.In addition, domestic coking coal mixed coal is serious, and because coking coal resource is rare, for pursuing more high profit, there are 1/3 coking coal, rich coal, lean coal in domestic coking coal market more or less mixture.In the face of complicated mixed coal ature of coal, existing coking coal assessment technique, can the ratio of the roughly each coal of discrimination mixed coal mixture, but the quality of each mixture coal cannot discrimination, so that cannot the impact of impact, especially thermal behavior of accurate characterization mixed coal Coke Quality.Maximum Giseeler fluidity MF is the important indicator affecting thermal behavior, but maximum Giseeler fluidity MF should control zone of reasonableness, unsuitable too high or too low; As MF>2000ddpm, the MF order of magnitude is large, can exaggerate the impact of fluidity STRENGTH ON COKE thermal behavior; Further, it is interval that the maximum Giseeler fluidity of coking coal concentrates on MF≤2000ddpm usually, and for the coking coal of MF>2000ddpm, most mixture has rich coal compared with high fluidity or 1/3 coking coal.For more making full use of the feature of the coking coal ature of coal of MF>2000ddpm, needing a kind of method can carrying out quantitative evaluation to the coking coal ature of coal of MF>2000ddpm, thus accomplishing accurate adapted, reduce coal blending cost.
Summary of the invention
The object of the present invention is to provide a kind of dry basis ash content≤9.00%, sulphur content≤0.6%, the evaluation method of the coking coal ature of coal of maximum Giseeler fluidity MF > 2000ddpm, the method is according to the percentage contribution of different quality index STRENGTH ON COKE thermal behavior, determine its weight, the relative superior or inferior degree of quantitatively evaluating separate sources coking coal quality, had both contributed to rationally bidding according to separate sources coking coal ature of coal, and had been conducive to again instructing coke making and coal blending.
For achieving the above object, technical scheme of the present invention comprises the steps:
1) detect the ature of coal key index of coking coal, draw its coarse grain mosaic texture ratio X
1(unit is %), fiber and schistose texture ratio sum X
2(unit is %), maximum Giseeler fluidity MF(unit are ddpm) and degree of expansion b(unit be %);
2) setting p is coking coal coal property evaluation index, and order:
P=100+2×[K
1×(X
1－X
j1)+K
2×（X
2－X
j2）+K
3×(|L×MF－800|－|L×MF
j－800|)+K
4×(|b－50|-|b
j－50|)]（1）
Wherein, X
j1(unit is %), X
j2(unit is %), MF
j(unit is ddpm) and b
j(unit is %) is respectively the coarse grain mosaic texture ratio of benchmark coking coal, fiber and schistose texture ratio sum, maximum Giseeler fluidity and degree of expansion;
Wherein K
1, K
2, K
3, K
4for constant, L is maximum fluidity correction factor, and is % with intensity CSR(unit after coke thermal response) be associated by following relational expression:
CSR=K+K
1×X
1+K
2×X
2+K
3×|L×MF-800|+K
4×|b-50|（2）
Wherein K is constant;
3) pass through six groups of dry basis ash content≤9.00%, sulphur content≤0.6%, the numerical value of the coarse grain mosaic texture ratio of the different coking coal of maximum Giseeler fluidity MF > 2000ddpm, fiber and schistose texture ratio sum, maximum Giseeler fluidity, degree of expansion and Thermal Properties of Coke substitutes into formula (2), obtains K, K
1, K
2, K
3, K
4and L; By K
1, K
2, K
3, K
4substitute into formula (1) with L, obtain coking coal coal property evaluation indices P, P value is larger, then represent coking coal ature of coal better.
The present invention has following beneficial effect:
(1) the coarse grain mosaic texture ratio of coking coal, fiber and schistose texture ratio sum, maximum Giseeler fluidity and degree of expansion are defined as the key index evaluating coking coal quality by the present invention, draw the weight of each evaluation index, specify the good and bad degree of separate sources coking coal;
(2) Reasonable Orientation of purchasing department to separate sources coking coal price is of value to;
(3) be of value to coal chemical enterprise to separate sources coking coal Reasonable use, be beneficial to coke quality steady and improve, reduce thermal behavior fluctuating range.
Embodiment
Below by way of embodiment, the present invention is further detailed explanation.
Certain enterprise's Blending of Coking Coals is 40%, dry basis ash content≤9.00% of described coking coal, sulphur content≤0.6%, and its Coal Blending Schemes is specially: coking coal A(coarse grain inlays 60%, fiber and sheet: 0%, MF:800ddpm, b:50%): 20%; Coking coal B(MF>2000ddpm): 20%; Rich coal: 15%; 1/3 coking coal: 26%; Gas-fat coal 5%; Lean coal: 14%.
Coking coal A, rich coal, 1/3 coking coal, gas-fat coal and lean coal remain unchanged, and get six groups of different coking coal B, carry out coal-blending coking according to said ratio, and obtain intensity (CSR) after coke thermal response, each related data is in table 1.
The different coking coal of table 1 carries out intensity after the thermal response of coke after coal blending
| Coal sample | X 1/% | X 2/% | MF/ddpm | b/ % | CSR/% |
| Coking coal 1# | 65 | 0 | 2080 | 80 | 67.87 |
| Coking coal 2# | 61 | 3 | 2980 | 102 | 65.42 |
| Coking coal 3# | 55 | 4 | 3882 | 82 | 64.79 |
| Coking coal 4# | 52 | 3 | 5980 | 110 | 62.95 |
| Coking coal 5# | 65 | 0 | 2500 | 100 | 67.15 |
| Coking coal 6# | 58 | 4 | 4800 | 90 | 65.71 |
Each for table 1 data are substituted into formula (2), draws K, K respectively
1, K
2, K
3, K
4with L be: 51.9347,0.2870 ,-0.2383 ,-0.0029 ,-0.0456 and 0.16;
Obtain: CSR=51.9347+0.2870 × X
1-0.2383 × X
2-0.0029 × | 0.16 × MF-800|-0.0456 × | b-50|
This enterprise newly buys five kinds of coking coal, and the coal analysis of each coking coal the results are shown in Table 2.
Table 2 conventional index analysis result
These 5 coking coal (namely coking coal 6# is to coking coal 10#) are according to evaluation criterion domestic at present, and because coking coal 6#, coking coal 7#G value are comparatively large, Y value is higher, and ature of coal is single, should ature of coal more excellent; Coking coal 8#, coking coal 9# and coking coal 10# are mixed coal, and ature of coal should inferior to coking coal 6# and coking coal 7#, and coking coal 8# to coking coal 10# indices is close, compare variance further, because coking coal 9# variance is little, ature of coal should be excellent compared with coking coal 8# and coking coal 10#, and coking coal 8# is worst.
In addition, the coarse grain mosaic texture ratio X of these five kinds of coking coal
1, fiber and schistose texture ratio sum X
2, maximum Giseeler fluidity MF and degree of expansion b is in table 3.
Table 3 coking coal coal property evaluation result
Coking coal ature of coal is with coarse grain mosaic texture ratio X
j1be 65%, fiber and schistose texture ratio sum X
j2be 0%, maximum Giseeler fluidity MF to be 2500ddpm and degree of expansion b be 100% coking coal be benchmark coking coal, its evaluation number is 100, then related data is substituted into formula (1), the coal property evaluation indices P of trying to achieve these 5 coking coal is respectively: 101.6,100.9,98.5,88.2 and 79.5.The evaluation number of coal sample 6#, coal sample 7# is higher than 100, and ature of coal is excellent compared with benchmark sample, is assessed as high-quality coking coal; Coal sample 8#, coal sample 10# evaluation number are lower than 100, and ature of coal is inferior to benchmark sample, and evaluation number, between 80-100, is assessed as general ature of coal coking coal, and coal sample 10# evaluation number, lower than 80, is coking coal inferior.
Above five kinds of coking coal (coking coal 6# is to coking coal 10#) are carried out coal-blending coking respectively, and its coking gained Thermal Properties of Coke is in table 4.
Intensity (CSR) after table 4 five kinds of coking coal participation coal-blending coking gained coke thermal responses
In table 4, scheme 1 inlays 60% for coking coal A(coarse grain, fiber and sheet: 0%, MF:800ddpm, b:50%): 20%; Coking coal B(MF>2000ddpm): 20%; Rich coal: 15%; 1/3 coking coal: 26%; Gas-fat coal 5%; Lean coal: 14%.Scheme 2 is bottle coal: 12%; Coking coal A:20%; Coking coal B(MF>2000ddpm): 20%; Rich coal: 20%; 1/3 coking coal: 18%; Lean coal 10%, wherein coking coal A in embodiment 1 ~ 10, rich coal, 1/3 coking coal, lean coal, gas-fat coal, bottle coal are all identical; Its relevant coal analysis the results are shown in Table 5.
Table 5 coal analysis result
As can be seen from Table 4, coal property evaluation method of the present invention can well to dry basis ash content≤9.00%, sulphur content≤0.6%, the coking coal ature of coal of maximum Giseeler fluidity MF>2000ddpm is evaluated, and the ature of coal of coking coal has good correlativity with intensity after the thermal response of this coking coal participation coal-blending coking gained coke.
Although present invention defines dry basis ash content≤9.00% of coking coal, sulphur content≤0.6%, this is mainly because relatively above three the index STRENGTH ON COKE Effect of Thermal Performances of the dry basis ash content of coking coal, sulphur content are little, when dry basis ash content, sulphur content exceed above scope, when STRENGTH ON COKE Effect of Thermal Performance be can not ignore, the present invention only needs work dry basis ash content and sulphur content correction to use.
Claims (1)
1. dry basis ash content≤9.00%, sulphur content≤0.6%, the evaluation method of the coking coal ature of coal of maximum Giseeler fluidity MF > 2000ddpm, is characterized in that: comprise the steps:
1) detect the ature of coal key index of coking coal, draw its coarse grain mosaic texture ratio X
1, fiber and schistose texture ratio sum X
2, maximum Giseeler fluidity MF and degree of expansion b;
2) setting P is coking coal coal property evaluation index, and order:
P＝100+2×[K
1×(X
1－X
j1)+K
2×(X
2－X
j2)+K
3×(|L×MF－800|－|L×MF
j－800|)+K
4×(|b－50|-|b
j－50|)](1)
Wherein X
j1, X
j2, MF
jand b
jbe respectively the coarse grain mosaic texture ratio of benchmark coking coal, fiber and schistose texture ratio sum, maximum Giseeler fluidity and degree of expansion; K
1, K
2, K
3, K
4for constant, L is maximum fluidity correction factor, and is associated by following relational expression with intensity CSR after coke thermal response:
CSR＝K+K
1×X
1+K
2×X
2+K
3×|L×MF-800|+K
4×|b-50|(2)
Wherein K is constant;
3) pass through six groups of dry basis ash content≤9.00%, sulphur content≤0.6%, the numerical value of the coarse grain mosaic texture ratio of the different coking coal of maximum Giseeler fluidity MF > 2000ddpm, fiber and schistose texture ratio sum, maximum Giseeler fluidity, degree of expansion and Thermal Properties of Coke substitutes into formula (2), can obtain K, K
1, K
2, K
3and K
4; Again by constant K
1, K
2, K
3, K
4, maximum fluidity correction factor L, benchmark coking coal X
j1, X
j2, MF
j, b
jwith the X of coking coal to be evaluated
1, X
2, MF, b substitute into formula (1), obtain coking coal coal property evaluation indices P, P value is larger, then represent coking coal ature of coal better.
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| CN103995964B (en) * | 2014-05-09 | 2017-07-21 | 武汉钢铁(集团)公司 | The method for setting up lean coal coal property evaluation model |
| CN104102821B (en) * | 2014-06-30 | 2017-11-07 | 武汉钢铁有限公司 | The method for setting up bottle coal coal property evaluation model |
| CN104951849B (en) * | 2015-06-19 | 2018-03-13 | 武汉钢铁有限公司 | A kind of Thermal Properties of Coke Forecasting Methodology |
| CN109409785B (en) * | 2018-11-29 | 2021-09-10 | 武汉钢铁有限公司 | Method for establishing coal quality comparison evaluation model among different coking coal types |
| CN110484288B (en) * | 2019-08-23 | 2020-07-03 | 山西沁新能源集团股份有限公司 | Coking and coal blending method |
| CN113684048B (en) * | 2021-08-19 | 2022-10-21 | 首钢集团有限公司 | Coking coal blending method, coal blending system and industrial control equipment |
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