CN109409785A - The method for establishing the coal quality comparative evaluation model of different coking coal inter-species - Google Patents

The method for establishing the coal quality comparative evaluation model of different coking coal inter-species Download PDF

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CN109409785A
CN109409785A CN201811442480.1A CN201811442480A CN109409785A CN 109409785 A CN109409785 A CN 109409785A CN 201811442480 A CN201811442480 A CN 201811442480A CN 109409785 A CN109409785 A CN 109409785A
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项茹
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Wuhan Iron and Steel Co Ltd
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Abstract

The invention discloses a kind of methods for establishing the coal quality comparative evaluation model between different coking coal coals, method includes the following steps: 1) determining the sample coal for participating in coal blending test, detect the Key Performance Indicator of sample coal, obtain the Key Performance Indicator of mixed coal；2) Key Performance Indicator of sample coal and/or mixed coal and the relationship equation of Thermal Properties of Coke CSR are established, dependent constant item in equation is found out；3) according to the difference of different coking coal coal STRENGTH ON COKE hot property contribution degrees, the coal quality comparative evaluation model of different coking coal coals is established；4) ash content, the amendment of sulphur content index.Contribution degree evaluation quality of the coal quality comparative evaluation model established by the present invention according to different types of coal STRENGTH ON COKE hot property, national standard is efficiently solved to the apparent limitation of coal property evaluation, all there is preferable directive significance to guarantee coke quality and reduce coal blending cost for avoiding the low coking capacity coal of purchase high price and the suitable coal of selection from carrying out coal blending.

Description

The method for establishing the coal quality comparative evaluation model of different coking coal inter-species
Technical field
The invention belongs to Coking Coal Blending Technology fields, and in particular to a kind of coal quality established between different coking coal coals compares The method of evaluation model.
Background technique
China's coking coal resource is in short supply, and strong cohesiveness coking coal resource is more in short supply.Coal property evaluation of the China to coking coal Basic according to national standard execution with using, domestic each steel mill is to meet coke needs needed for large blast furnace, and adapted largely coheres by force Property coking coal, causes to stick coal selling at exorbitant prices by force.In addition, each enterprise usually selects caking index height, volatile matter for similar coal Low coal preferentially selects coking coal rich coal in the selection evaluation of coal, but to divide wider range general for China's coking coal coal, It is often found that the coking capacity of some coking coal is inferior to 1/3 coking coal；And it is all rich coal, and price is close, but some high volatile rich coal Coking capacity to be far inferior to low volatile rich coal；The also coking capacity of some bottle coals is close to 1/3 coking coal；Also some 1/3 coking coal are inclined Bottle coal feature.
In addition, because by traditional coking coal coal property evaluation technique influence, each coal mining enterprise, will be bad often from number one Matter coal is shuffled with fat coal, to reach the index request of user, therefore, it is often found that adapted high proportion " strong cohesiveness " coal It cannot get high grade coke.And the strong cohesiveness Import Coal that some high prices are introduced also cannot get high-quality coke because evaluating improper use Charcoal.
Therefore, each steel mill is also dedicated in the rational evaluation research of coking coal to control coal blending cost.Many producers are The method of coal subdivision and fine-grained management is taken through to reduce coking coal buying and coal blending cost, this method, which both stabilizes, matches Texture of coal, while certain guidance can also be provided for buying.Be disadvantageous in that: this method does not link up with coal quality and price, to adopting Level of the guidance of purchase also in relatively abstract macroscopic view, some good coking coal selling at exorbitant prices, coal blending cost also it is corresponding partially It is high.The enterprises such as domestic Laigang, Handan Iron and Steel Co and Shanxi Coking Plant assign the conventional index of coking coal to certain weight proportion, further progress Subtract and withhold, carry out buying adapted, achieves certain positive effect, but conventional index is easily segregated coal property evaluation, comments Valence model also easily deviates.
Therefore, coking industry needs exploitation coking coal cost performance technology, and coal chemical enterprise is instructed rationally to purchase coking coal resource, Also effectively control upstream coal enterprise and seriously shuffle different coal quality coking coals, promote the harmony health operation development of coal tar enterprise. On the other hand, China's high-quality caking coal scarcity of resources, high volatile coking coal resource is sufficient, and project optimizes to instructing coking industry Coking coal adapted, obtaining has directive significance compared with high yield.
Summary of the invention
The technical problem to be solved by the present invention is to the contributions according to different types of coal coking coal Coke Quality, provide one kind The method for establishing the coal quality comparative evaluation model between different coking coal coals, with to each coking coal coal quality and cost performance close Reason evaluation, instructs iron and steel enterprise rationally to purchase coking coal adapted coking coal.
In order to solve the above technical problems, method designed by the present invention is main including the following steps:
1) it determines the sample coal for participating in coal blending test, detects the Key Performance Indicator of sample coal, obtain the key performance of mixed coal Index: according to ratio Y of the various kinds coal in mixed coaliAnd the coarse grain mosaic texture ratio D that the independent coking of sample coal containsI coarse grain, it is fine Peacekeeping laminated structure ratio DI fiber sheet, isotropic structure ratio DI isotropism, respectively obtain coarse grain mosaic texture ratio in mixed coal Weighted number XCoarse grain, fiber and laminated structure ratio XFiber sheet, isotropic structure ratio XIsotropism, wherein i represents i-th kind of sample coal；Together Fluidity > 10000ddpm sample coal fluidity logarithm weighted number lgMF can be obtained in sample1, fluidity > 10000ddpm sample coal Weight dilation b1, 1000ddpm < fluidity≤10000ddpm sample coal fluidity logarithm weighted number lgMF2, ash content, sulphur Point.
2) Key Performance Indicator of sample coal and/or mixed coal and the relationship equation of Thermal Properties of Coke CSR are established: (usually Coal chemical enterprise has stringent limitation to ash content, sulphur content, does not consider ash content and sulphur content first)
CSR=K+K1XCoarse grain+K2XFiber sheet+K3XIsotropism+K4lgMF1+K5b1+K6lgMF2； (1)
Wherein K, K1、K2、K3、K4、K5And K6For constant.
3) by the way that the related data of at least eight groups Coking Test for Blend is substituted into formula (1), constant K, K are found out1、K2、K3、 K4、K5And K6, it is clear that coarse grain mosaic texture ratio is not zero at least one group mixed coal, fiber at least one group mixed coal It is not zero with laminated structure ratio, isotropic structure ratio is not zero at least one group mixed coal, at least one group cooperation In the sample coal of coal at least containing a kind of fluidity>10000ddpm coal and at least contain a kind of 1000ddpm<fluidity≤ The coal of 10000ddpm.
4) according to the difference of different coking coal coal STRENGTH ON COKE hot property contribution degrees, the coal quality of different coking coal coals is established Comparative evaluation model:
Pj=PConstant+(K1DJ coarse grain+K2DJ fiber sheet+K3DJ isotropism)+PTechnique/PStructure(V1K4lgMFj+K5bj+V2K6lgMFj)； (2)
Wherein PjIndicate the coal quality scoring of jth kind coal, PStructureIt is coking microstructure to the contribution degree of hot property, lgMFj The fluidity logarithm for indicating jth kind coal, as fluidity MFjWhen > 10000ddpm, V11 is taken, otherwise takes 0；When 1000ddpm < Fluidity MFjWhen≤10000ddpm, V21 is taken, otherwise takes 0；bjIndicate the dilation of jth kind coal；PTechnique/PStructure=(K1XCoarse grain+ K2XFiber sheet+K3XIsotropism)/(K4lgMF1+K5b1+K6lgMF2)；PConstantAccording to the key of the benchmark coal for giving the scoring of its coal quality Energy index is obtained by formula (2)；
5) ash content, the amendment of sulphur content index: ash content, the sulphur content of coke are affected to blast fumance usage factor, by grey sulphur Index, which is converted to, is modified CSR influence.
A) ash content of coke rises 1%, and the coke ratio of blast furnace increases 1.5~2.3%；
B) sulphur content of coke rises 0.1%, and the coke ratio of blast furnace increases 1.2~2.0%；
C) CSR of coke declines 1%, coke ratio absolute lift-off value about 6kg/t, based on coke ratio 300~400kg/t iron, coke ratio It is opposite to increase about 1.5~2.0%.
Therefore, it can be approximately considered, the ash content of coke rises 1% or sulphur content 0.1%, CSR of rising decline 1%.
First blast-furnace coke ash content: Ad is converted by pit ashIt is burnt=100AdCoal/ (100-VdCoal), VdCoal=VDaf, coal (100-AdCoal)/100；Wherein AdIt is burntIndicate the dry basis ash content of coke, AdCoalIndicate the dry basis ash content of coal, VdCoalIndicate the butt of coal Volatile matter, VDaf, coalIndicate the dry ash free basis volatile matter of coal；Coke sulphur S is converted into after the sulphur content coking of coalIt is burntAbout 0.8SCoal, because 0.8S is pressed in this present inventionCoalIt is calculated；
Then the ash content and sulphur content for comparing coke after coal coking, with benchmark coke ash, sulphur content indicator difference；Then according to The ash content of coke rises 1% or sulphur content 0.1%, CSR of rising decline 1%.
6) it finally determines to any coking coal, coal quality scoring P are as follows:
P=PConstant+(K1XCoarse grain+K2XFiber sheet+K3XIsotropism)+PTechnique/PStructure(K4lgMF1+K5b 1+K6lgMF2)+(AdBurnt benchmark? AdIt is burnt)+10×(SBurnt benchmark- SIt is burnt), wherein AdBurnt benchmarkThe benchmark ash content for indicating enterprise's coke (is exactly each enterprise's STRENGTH ON COKE ash content institute Set the upper limit value of performance assessment criteria), SBurnt benchmarkThe benchmark sulphur content for indicating enterprise's coke (is exactly set by each enterprise's STRENGTH ON COKE sulphur content The upper limit value of performance assessment criteria)；The P value the big, indicates that its coal quality is better.
If ash content < 12.5% of blast-furnace coke, sulphur content < 0.7% meter:
P=PConstant+(K1XCoarse grain+K2XFiber sheet+K3XIsotropism)+PTechnique/PStructure(K4lgMF1+K5b1+K6lgMF2)+(12.5-AdIt is burnt) + 10 × (0.7-SIt is burnt)。
Coal quality comparative evaluation model established by the present invention evaluates matter according to the contribution degree of different types of coal STRENGTH ON COKE hot property Amount, efficiently solves national standard and rationally adopts to the apparent limitation of coal property evaluation for instructing purchasing department's arm's length pricing Purchase, avoid buying the low coking capacity coal of some high prices and coal blending select suitable coal to be combined with guarantee coke quality and Reducing coal blending cost all has preferable directive significance.
Specific embodiment
Below in conjunction with specific embodiment, the present invention is described in further detail.
Effect of the present invention according to each single grade coal in coal-blending coking proposes a kind of coal established between different coking coal coals The method of matter comparative evaluation model:
1) it determines the sample coal for participating in coal blending test, detects the Key Performance Indicator of sample coal, obtain the key performance of mixed coal Index: according to ratio Y of the various kinds coal in mixed coaliAnd the coarse grain mosaic texture ratio D that the independent coking of sample coal containsI coarse grain, it is fine Peacekeeping laminated structure ratio DI fiber sheet, isotropic structure ratio DI isotropism, respectively obtain coarse grain mosaic texture ratio in mixed coal Weighted number XCoarse grain, fiber and laminated structure ratio XFiber sheet, isotropic structure ratio XIsotropism, wherein i represents i-th kind of sample coal；Together Fluidity > 10000ddpm sample coal fluidity logarithm weighted number lgMF can be obtained in sample1, fluidity > 10000ddpm sample coal Weight dilation b1, 1000ddpm < fluidity≤10000ddpm sample coal fluidity logarithm weighted number lgMF2, detect sample coal Ash content, sulphur content.
2) Key Performance Indicator of sample coal and/or mixed coal and the relationship equation of Thermal Properties of Coke CSR are established: (usually Coal chemical enterprise has stringent limitation to ash content sulphur content, does not consider ash content sulphur content first)
CSR=K+K1XCoarse grain+K2XFiber sheet+K3XIsotropism+K4lgMF1+K5b1+K6lgMF2； (1)
Wherein K, K1、K2、K3、K4、K5And K6For constant.
3) by the way that the related data of at least eight groups Coking Test for Blend is substituted into formula (1), constant K, K are found out1、K2、K3、 K4、K5And K6, it is clear that coarse grain mosaic texture ratio is not zero at least one group mixed coal, fiber at least one group mixed coal It is not zero with laminated structure ratio, isotropic structure ratio is not zero at least one group mixed coal, at least one group cooperation In the sample coal of coal at least containing a kind of fluidity>10000ddpm coal and a kind of 1000ddpm<fluidity≤10000ddpm Coal.
4) according to the difference of different coking coal coal STRENGTH ON COKE hot property contribution degrees, the coal quality of different coking coal coals is established Comparative evaluation model:
Pj=PConstant+(K1DJ coarse grain+K2DJ fiber sheet+K3DJ isotropism)+PTechnique/PStructure(V1K4lgMFj+K5bj+V2K6lgMFj)； (2)
Wherein PjIndicate the coal quality scoring of jth kind coal, PStructureIt is coking microstructure to the contribution degree of hot property, lgMFj The fluidity logarithm for indicating jth kind coal, as fluidity MFjWhen > 10000ddpm, V11 is taken, otherwise takes 0；When 1000ddpm < Fluidity MFjWhen≤10000ddpm, V21 is taken, otherwise takes 0；bjIndicate the dilation of jth kind coal；PTechnique/PStructure=(K1XCoarse grain+ K2XFiber sheet+K3XIsotropism)/(K4lgMF1+K5b1+K6lgMF2)；PConstantAccording to the key of the benchmark coal for giving the scoring of its coal quality Energy index is obtained by formula (2).
5) ash content, the amendment of sulphur content index: ash content, the sulphur content of coke are affected to blast fumance usage factor, by grey sulphur Index, which is converted to, is modified CSR influence.
A) ash content of coke rises 1%, and the coke ratio of blast furnace increases 1.5~2.3%；
B) sulphur content of coke rises 0.1%, and the coke ratio of blast furnace increases 1.2~2.0%；
C) CSR of coke declines 1%, coke ratio absolute lift-off value about 6kg/t, based on coke ratio 300~400kg/t iron, coke ratio It is opposite to increase about 1.5~2.0%.
Therefore, it can be approximately considered, the ash content of coke rises 1% or sulphur content 0.1%, CSR of rising decline 1%.
First blast-furnace coke ash content: Ad is converted by pit ashIt is burnt=AdCoal/ (100-VdCoal), VdCoal=VDaf, coal(100- AdCoal)/100；Wherein AdIt is burntIndicate the dry basis ash content of coke, AdCoalIndicate the dry basis ash content of coal, VdCoalIndicate the butt volatile matter of coal, VDaf, coalIndicate the dry ash free basis volatile matter of coal；Coke sulphur S is converted into after the sulphur content coking of coalIt is burntAbout 0.8SCoal, therefore this hair 0.8S is pressed in brightCoalIt is calculated；
Then the ash content and sulphur content for comparing coke after coal coking, with benchmark coke ash, sulphur content indicator difference；Then according to The ash content of coke rises 1% or sulphur content 0.1%, CSR of rising decline 1%.
6) it finally determines to any coking coal, coal quality scoring P are as follows:
P=PConstant+(K1XCoarse grain+K2XFiber sheet+K3XIsotropism)+PTechnique/PStructure(K4lgMF1+K5b 1+K6lgMF2)+(AdBurnt benchmark? AdIt is burnt)+10×(SBurnt benchmark- SIt is burnt), wherein AdBurnt benchmarkThe benchmark ash content for indicating enterprise's coke (is exactly each enterprise's STRENGTH ON COKE ash content institute Set the upper limit value of performance assessment criteria), SBurnt benchmarkThe benchmark sulphur content for indicating enterprise's coke (is exactly set by each enterprise's STRENGTH ON COKE sulphur content The upper limit value of performance assessment criteria)；The P value the big, indicates that its coal quality is better.
If ash content < 12.5% of blast-furnace coke, sulphur content < 0.7% meter:
P=PConstant+(K1XCoarse grain+K2XFiber sheet+K3XIsotropism)+PTechnique/PStructure(K4lgMF1+K5b1+K6lgMF2)+(12.5-AdIt is burnt) + 10 × (0.7-SIt is burnt)。
Embodiment
Certain enterprise's coking mixed coal is made of bottle coal, 1/3 coking coal, rich coal, coking coal and lean coal, converts each coal adapted ratio Example carries out coal-blending coking experiment.1 month experimental data of the enterprise is arranged, the test of coking optical texture is carried out to each single grade coal, And flow board expansion test.
The coarse grain mosaic texture ratio of single grade coal coking each in mixed coal is summed up by its weight, at pyrocellulose and Laminated structure ratio is summed up by its weight, is summed up to isotropic structure ratio by its weight.To fluidity > Fluidity logarithm, the dilation of 10000ddpm rich coal obtain its fluidity logarithm weighted number, expansion with its multiplied by weight respectively Spend weighted number；It is obtained to 10000ddpm >=1/3 coking coal of fluidity > 1000ddpm fluidity logarithm and its multiplied by weight Fluidity logarithm weighted number.
Key Performance Indicator and CSR in each scheme of table 1
The Key Performance Indicator of 30 Coal Blending Schemes and CSR are subjected to multiple linear regression, recurrence side with minitab software Journey are as follows:
CSR=43.0+0.613XCoarse grain- 0.25XFiber sheet+2.32lgMF1+4.78lgMF2+0.078b2- 0.20XIsotropism。 (formula 1)
The daily benchmark coal blending of the enterprise are as follows:
Bottle coal 5%, coking coal 45%, 1/3 coking coal 20%, rich coal 15%, lean coal 15%；
The CSR of daily coke is 70.5%, which is 39%, fiber and sheet knot Structure is 4%, isotropic structure 2%, and the fluidity of 1/3 coking coal is 1000ddpm (lgM:3), the fluidity of rich coal 10000ddpm (lgMF:4), dilation 120%；
Then:
PTechnique/PStructure=(2.32*3*20+4.78*4*15+0.078*15*120)/(0.613*39-0.25*4-0.2*2) =0.25
P=PConstant+(K1XCoarse grain+K2XFiber sheet+K3XIsotropism)+PTechnique/PStructure(K4lgMF1+K5b1+K6lgMF2)-(A dIt is burnt? 12.5) -10 × (SIt is burnt- 0.7)
The benchmark ash content of enterprise's coke fixed 12.5%, sulphur content 0.7%, SIt is burntWith 0.8CoalIt is calculated.
P=PConstant+(K1XCoarse grain+K2XFiber sheet+K3XIsotropism)+PTechnique/PStructure(K4lgMF1+K5b1+K6lgMF2)-(AdIt is burnt? AdBurnt benchmark) -10 × (SIt is burnt- SBurnt benchmark)
P=PConstant+0.613XCoarse grain- 0.25XFiber sheet- 0.2XIsotropism+0.25×(2.32lgMF1+4.78×lgMF2+ 0.078×b2)-(AdIt is burnt- 12.5) -10 × (SIt is burnt- 0.7)
It is 55% by coarse grain mosaic texture ratio, fibre-bearing and laminated structure and isotropic structure, fluidity are not lower than 1000ddpm, sulphur content 0.5%, ash content: 10.0%, the coking coal of volatile matter 26% is set as benchmark coal, and coal quality scoring is set as 90, Then PConstantIt is 55.
P=55+0.613XCoarse grain- 0.25XFiber sheet- 0.2XIsotropism+0.25×(2.32lgMF1+4.78×lgMF2+0.078 ×b2)+(12.5-AdIt is burnt)+10×(0.7-SIt is burnt)。
9 different types of coal coals quality are subjected to evaluation sequence；
2 coal analysis result of table
Coal sample Ad/% Vdaf/ % St, ad/% G Y/mm
Bottle coal 7.97 38.38 0.82 72 12
Rich coal 1# 7.52 35.56 0.52 95 26
Rich coal 2# 9.81 31.12 1.42 95 26
1/3 coking coal 1# 9.83 30.15 0.46 89 18
1/3 coking coal 2# 7.56 35.68 0.68 88 17
Coking coal 1# 9.82 24.52 0.45 84 16
Coking coal 2# 9.86 22.53 1.25 85 16
Coking coal 3# 9.83 23.50 0.45 83 16
Lean coal 9.56 17.56 0.45 40 5
The initial coal quality evaluation result of table 3
As known from Table 3, it is corrected without grey sulphur, the coal quality initial evaluation sort result of each single grade coal: coking coal 2# > coking coal 1# > Rich coal 2# > the coking coal of the coking coal 3# > 1/3 1# > coking coal of rich coal 1# > 1/3 2# > lean coal > bottle coal.
But coking coal 2#, rich coal 2# are sulphur coal, easily make sulfur content in coke high, it is unfavorable to blast fumance, each single grade coal Ash content is not also identical, therefore, further progress ash sulphur is needed to correct.It is required according to step 5), it is final after the amendment of grey sulphur index Coal property evaluation the results are shown in Table 4.
The final coal property evaluation result of table 4
In table 4 rich coal 2# and coking coal 2# because sulphur content index it is high, coal property evaluation is both needed to correct, final appraisal results and table 3 are slightly different.For further comparative evaluation reasonability, above-mentioned coal is subjected to substitution coal blending experiment:
5 Coal Blending Schemes of table
6 coal blending experimental result of table
Scheme CSR/%
1# (benchmark) 72.00
2# (bottle coal substitutes 10%1/3 coking coal 1#) 67.00
3# (lean coal substitutes 10%1/3 coking coal 1#) 68.50
4# (coking coal 1# substitutes 10%1/3 coking coal 1#) 73.50
5# (coking coal 2# substitutes 10%1/3 coking coal 1#) 74.00
6# (coking coal 3# substitutes 10%1/3 coking coal 1#) 72.20
7# (1/3 coking coal 2# substitutes 10%1/3 coking coal 1#) 70.00
8# (rich coal 1# substitutes 10%1/3 coking coal 1#) 71.00
9# (rich coal 2# substitutes 10%1/3 coking coal 1#) 73.00
Adapted result: scheme 5# > scheme 4# > scheme 9# > scheme 6# > scheme 1# > scheme 8# > scheme 7# > scheme 3# > scheme 2#；After 1/3 coke 1# of namely each coal substitution 10%, each alternative result sequence:
Coking coal 2# > coking coal 1# > rich coal 2# > the coking coal of the coking coal 3# > 1/3 1# > coking coal of rich coal 1# > 1/3 2# > lean coal > bottle coal；This Alternative result is consistent with the initial coal quality evaluation result of table 3 (not considering grey sulphur Index Influence).
Because coking coal 2#, rich coal 2# sulphur content index are high, also need to influence blast furnace coke ratio according to grey sulphur index, further progress sulphur Divide amendment.
According to step 5), after ash content, the amendment of sulphur content index, therefore its coal quality marking and queuing: coking coal 1# > coking coal 2# > coke The coking coal of the coal 3# > 1/3 1# > rich coal 2# > coking coal of rich coal 1# > 1/3 2# > lean coal > bottle coal, i.e. 4 evaluation result of table.
Therefore, according to table 3 and table 4 it is found that coking coal 1# low-sulfur, coking coarse grained texture is high, and coal quality is excellent, although coking coal 2# coking Coarse grain mosaic texture is high, but sulphur content is higher, and coal quality scoring is slightly below coking coal 1#；During the scoring of high volatile rich coal 2# coal quality is lower than 1/3 coking coal 1# of volatile matter high G-value.
Therefore, enterprise price positioning in the buying of coking coal are as follows: the coking coal 1# > coking coal 2# > coking coal of coking coal 3# > 1/3 1# > Rich coal 2# > the coking coal of rich coal 1# > 1/3 2# > lean coal > bottle coal.

Claims (4)

1. a kind of method for establishing the coal quality comparative evaluation model between different coking coal coals, it is characterised in that: this method includes Following steps:
1) it determines the sample coal for participating in coal blending test, detects the Key Performance Indicator of sample coal, obtain the Key Performance Indicator of mixed coal: According to ratio Y of the various kinds coal in mixed coaliAnd the coarse grain mosaic texture ratio D that the independent coking of sample coal containsI coarse grain, fiber and Laminated structure ratio DI fiber sheet, isotropic structure ratio DI isotropism, respectively obtain coarse grain mosaic texture proportion weighted in mixed coal Number XCoarse grain, fiber and laminated structure ratio XFiber sheet, isotropic structure ratio XIsotropism, wherein i represents i-th kind of sample coal；Equally, Fluidity > 10000ddpm sample coal fluidity logarithm weighted number lgMF can be obtained1, fluidity > 10000ddpm sample coal plus Weigh dilation b1, 1000ddpm < fluidity≤10000ddpm sample coal fluidity logarithm weighted number lgMF2, detect and obtain sample Pit ash, sulphur content；
2) Key Performance Indicator of sample coal and/or mixed coal and the relationship equation of Thermal Properties of Coke CSR: CSR=K+ are established K1XCoarse grain+K2XFiber sheet+K3XIsotropism+K4lgMF1+K5b1+K6lgMF2； (1)
Wherein K, K1、K2、K3、K4、K5And K6For constant；
3) by the way that the related data of at least eight groups Coking Test for Blend is substituted into formula (1), constant K, K are found out1、K2、K3、K4、K5 And K6, it is clear that coarse grain mosaic texture ratio is not zero at least one group mixed coal, fiber and piece at least one group mixed coal Shape structure proportion is not zero, and isotropic structure ratio is not zero at least one group mixed coal, at least one group mixed coal In sample coal at least containing a kind of fluidity>10000ddpm coal and at least contain a kind of 1000ddpm<fluidity≤ The coal of 10000ddpm；
4) according to the difference of different coking coal coal STRENGTH ON COKE hot property contribution degrees, the coal quality for establishing different coking coal coals compares Evaluation model:
Pj=PConstant+(K1DJ coarse grain+K2DJ fiber sheet+K3DJ isotropism)+PTechnique/PStructure(V1K4lgMFj+K5bj+V2K6lgMFj)； (2)
Wherein PjIndicate the coal quality scoring of jth kind coal, PStructureIt is coking microstructure to the contribution degree of hot property, lgMFjIt indicates The fluidity logarithm of jth kind coal, as fluidity MFjWhen > 10000ddpm, V11 is taken, otherwise takes 0；When 1000ddpm < flowing Spend MFjWhen≤10000ddpm, V21 is taken, otherwise takes 0；bjIndicate the dilation of jth kind coal；PTechnique/PStructure=(K1XCoarse grain+ K2XFiber sheet+K3XIsotropism)/(K4lgMF1+K5b1+K6lgMF2)；PConstantAccording to the key of the benchmark coal for giving the scoring of its coal quality Energy index is obtained by formula (2)；
5) ash content, the amendment of sulphur content index: ash content, the sulphur content of coke are affected to blast fumance usage factor, by grey sulphur index It is converted to and CSR influence is modified, finally determine to any coking coal, coal quality scoring P are as follows:
P=PConstant+(K1XCoarse grain+K2XFiber sheet+K3XIsotropism)+PTechnique/PStructure(K4lgMF1+K5b1+K6lgMF2)+(AdBurnt benchmark- AdIt is burnt)+10 ×(SBurnt benchmark- SIt is burnt), wherein AdBurnt benchmarkIndicate the benchmark ash content of enterprise's coke, SBurnt benchmarkIndicate the benchmark sulphur content of enterprise's coke；P value is got over It is big then indicate that its coal quality is better；The AdIt is burnt=AdCoal/ (100-VdCoal), VdCoal=VDaf, coal(100-AdCoal)/100；Wherein AdIt is burntTable Show the dry basis ash content of coke, AdCoalIndicate the dry basis ash content of coal, VdCoalIndicate the butt volatile matter of coal, VDaf, coalIndicate the drying of coal Ash free basis volatile matter；SIt is burntIt is expressed as sulphur content S in cokeIt is burnt。
2. the method according to claim 1 for establishing the coal quality comparative evaluation model between different coking coal coals, feature Be: it is 20~60 groups that data are substituted into the step 3), with minitab software carry out multiple linear regression find out constant K, K1、K2、K3、K4、K5And K6。
3. the method according to claim 1 or 2 for establishing the coal quality comparative evaluation model between different coking coal coals, special Sign is: coarse grain mosaic texture ratio, fiber and laminated structure ratio and respectively to same in every group of mixed coal in the step 3) Property structure proportion be all not zero, at least containing the coal and at least of fluidity > 10000ddpm a kind of in the sample coal of every group of mixed coal Contain a kind of 1000ddpm < fluidity≤10000ddpm coal.
4. the method according to claim 3 for establishing the coal quality comparative evaluation model between different coking coal coals, feature Be: in the sample coal of every group of mixed coal containing a kind of fluidity>10000ddpm coal and a kind of 1000ddpm<fluidity≤ The coal of 10000ddpm.
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