CN104312609B - Control the blending method of coking coal index of basicity - Google Patents
Control the blending method of coking coal index of basicity Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
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Abstract
The invention discloses a kind of blending method of controlling coking coal index of basicity, comprise the steps: 1) measure degree of coalification and the charred coal organization structure of coking coal, measure its ash component composition, calculate its index of basicity; 2) according to degree of coalification, charred coal organization structure and index of basicity, coking coal is divided into four large class 16 groups; 3) all kinds of coking coals are carried out to adapted, and control index of basicity MBI≤2 of mixed coal, it is 5～30% that the anisotropy that in charred coal organization, isotropism tissue and isochrome district are less than 2um is organized sum, isochrome district is that the anisotropy of 2～7um is organized as 15～30%, isochrome district is that the anisotropy of 7～30um is organized as 15～30%, and the anisotropy that silk carbon, fragmentation and isochrome district are more than or equal to 30um is organized as 30～40%. The present invention is using degree of coalification, charred coal organization structure and index of basicity as coal property evaluation and classification indicators, and gives accordingly coal blending, do not need to do Coking Test for Blend, and is beneficial to and stablizes intensity after coke thermal response.
Description
Technical field
The invention belongs to metallurgical coking technology field, be specifically related to a kind of coking coal basicity of controllingThe blending method of index.
Background technology
Coke quality is high and stable, is one of primary condition of smooth operation of furnace. Ash content is cokeOne of index of quality. Because the coefficient of cubical expansion of ash content is than coke porous height 6～10Doubly, therefore in the time that coke porous body at high temperature shrinks, ash particles but has and shrinkage stressThe swelling stress of opposite direction, then produce the radiological predication fallout plot crackle as center, like this,CO2Be easy to be deep into coke inside, accelerate coke structure collapse.
For ensureing coke strenth, must limit the character of the coking coal that participates in coal blending.But the large multi-control technological property index of coking coal in prior art, as caking index G value, glueThe indexs such as matter layer thickness Y value, sub-dilation b value difficult to understand, rheological characteristic; Also there is minority coal blending sideMethod has been considered degree of coalification or charred coal organization structural parameters; Baosteel Coke prediction of quality modelPropose the impact of mineral matter index STRENGTH ON COKE calorific intensity CSR, but lacked from sourceControl the method for coking coal index of basicity.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of coking coal index of basicity controlledBlending method, to control the alkali metal content of coke from source, reduces alkali metal STRENGTH ON COKEBad effect, ensure smelt normally carry out.
For solving the problems of the technologies described above, the technical scheme of the present invention's design comprises the steps:
1) degree of coalification and the charred coal organization structure of mensuration coking coal, measure its ash component groupBecome, calculate its index of basicity;
2) according to degree of coalification, charred coal organization structure and index of basicity, coking coal is dividedClass;
2.1) forCoking coal: isotropism tissue with etc.Look district is less than the anisotropy of 2um and organizes sum >=65%, and index of basicity MBI≤2, are divided into111 classes; Isotropic tissue and isochrome district are less than the anisotropy of 2um and organize sum >=65%,Index of basicity MBI > 2, is divided into 112 classes; Isotropic tissue and isochrome district are less than 2um'sAnisotropy is organized sum < 65%, and index of basicity MBI≤2 are divided into 121 classes; Every sameProperty tissue and isochrome district are less than the anisotropy of 2um and organize sum < 65%, index of basicity MBI> 2, is divided into 122 classes;
2.2) forCoking coal: isochrome district is 2～7umAnisotropy tissue >=60%, index of basicity MBI≤2, are divided into 211 classes; Isochrome district isAnisotropy tissue >=60% of 2～7um, index of basicity MBI > 2, is divided into 212 classes;Isochrome district is that the anisotropy of 2～7um is organized < 60%, and index of basicity MBI≤2, are divided into221 classes; Isochrome district is that the anisotropy of 2～7um is organized < 60%, index of basicity MBI >2, be divided into 222 classes;
2.3) forCoking coal: isochrome district is 7～30umAnisotropy tissue >=55%, index of basicity MBI≤2, are divided into 311 classes; Isochrome district isAnisotropy tissue >=55% of 7～30um, index of basicity MBI > 2, is divided into 312 classes;Isochrome district is that the anisotropy of 7～30um is organized < 55%, and index of basicity MBI≤2, are divided into321 classes; Isochrome district is that the anisotropy of 7～30um is organized < 55%, index of basicity MBI> 2, is divided into 322 classes;
2.4) forCoking coal: silk carbon, fragmentation and isochromeDistrict is more than or equal to the anisotropy of 30um and organizes sum≤60%, index of basicity MBI≤2,Be divided into 411 classes; Silk carbon, fragmentation and isochrome district are more than or equal to the anisotropy tissue of 30umSum≤60%, index of basicity MBI > 2, is divided into 412 classes; Silk carbon, fragmentation and isochrome districtThe anisotropy that is more than or equal to 30um is organized sum > 60%, index of basicity MBI≤2,Be divided into 421 classes; Silk carbon, fragmentation and isochrome district are more than or equal to the anisotropy tissue of 30umSum > 60%, index of basicity MBI > 2, is divided into 422 classes;
3) all kinds of coking coals are carried out to adapted, 111 class coking coal allocation ratios 5～15%, 112Class coking coal allocation ratio 0～15%, 121 class coking coal allocation ratio 0～10%, 122 classesCoking coal allocation ratio 0～10%; 211 class coking coal allocation ratio 10～50%, 212 classes0～25%, 221 class coking coal allocation ratio 0～25%, the 222 class refinings of coking coal allocation ratioCoking coal allocation ratio 0～25%; 311 class coking coal allocation ratio 10～50%, 312 class refinings0～25%, 321 class coking coal allocation ratio 0～25%, the 322 class coking of coking coal allocation ratioCoal allocation ratio 0～15%; 411 class coking coal allocation ratio 5～25%, 412 class coking coalsAllocation ratio 0～15%, 421 class coking coal allocation ratio 0～15%, 422 class coking coals are joinedEnter ratio 0～10%; And control index of basicity MBI≤2 of mixed coal, charred coal organizationIt is 5～30% that the anisotropy that middle isotropism tissue and isochrome district are less than 2um is organized sum,Isochrome district is that the anisotropy of 2～7um is organized as 15～30%, and isochrome district is 7～30umAnisotropy be organized as 15～30%, silk carbon, fragmentation and isochrome district are more than or equal to 30umAnisotropy be organized as 30～40%.
Further, described step 3) in, all kinds of coking coals are carried out to adapted as follows,111 class coking coal allocation ratio 7～12%, 112 class coking coal allocation ratios 0～10%, 121Class coking coal allocation ratio 0～8%, 122 class coking coal allocation ratios 0～7%; 211 class refinings13～35%, 212 class coking coal allocation ratio 0～20%, the 221 class refinings of coking coal allocation ratioCoking coal allocation ratio 5～20%, 222 class coking coal allocation ratios 0～21%; 311 class coking15～40%, 312 class coking coal allocation ratio 0～20%, the 321 class coking of coal allocation ratioCoal allocation ratio 5～20%, 322 class coking coal allocation ratios 0～10%; 411 class coking coalsAllocation ratio 7～20%, 412 class coking coal allocation ratio 0～10%, 421 class coking coals are joinedEnter ratio 0～10%, 422 class coking coal allocation ratios 0～7%.
Further, described step 3) in, index of basicity MBI≤2 of control mixed coal,The anisotropy that in charred coal organization, isotropism tissue and isochrome district are less than 2um is organized itBe 10～25%, the anisotropy that isochrome district is 2～7um is organized as 20～30%, isochromeDistrict is that the anisotropy of 7～30um is organized as 17～25%, and silk carbon, fragmentation and isochrome district are largeIn or the anisotropy that equals 30um be organized as 30～36%.
The present invention has advantages of as follows:
1, the present invention breaks metallurgy industry standard YB/T077-1995 " charred coal organization mensurationMethod " in regulation the same sex, particulate, middle grain, coarse grain, not exclusively fiber, complete fiber,Compass between silk carbon and fragmentation, significant with the matter on Coke Strength impact redefiningFeature structure is as coal property evaluation and classification indicators, with this method defined " respectively toProperty tissue and isochrome district are less than the anisotropy tissue of 2um ", " isochrome district be 2～7um itBetween anisotropy tissue ", " isochrome district is the anisotropy tissue between 7～30um " and" silk carbon, fragmentation and isochrome district are more than or equal to the anisotropy tissue of 30um " is as ature of coalEvaluation and classification index, the study discovery of inventor's warp to reciprocal effect between each coal,Between these structures and Indexes on Coke Strength, there is more close contacting; And due to alkali metalCatalytic action, the index of basicity of coking coal affects intensity after the thermal response of coke, by basicityIndex is made as the classification indicators of coking coal, makes classification indicators more reasonable, is beneficial to stable cokeIntensity after thermal response.
2,, while formulating Coal Blending Schemes, only need to measure reflectivity, the charred coal organization of coking coalStructure and ash composition composition, do not need to do Coking Test for Blend.
3,, without making firm by ramming, without coal damping, without moulded coal, dress coke oven in top is dry above for 4.3 meters of traditionUnder quenching condition, adopt the inventive method to carry out coal-blending coking gained hot strength of coke CSR and exist60～70%, the index of basicity MBI of coke is 2.5～2.8, cold strength M4085～89%,M105.5～7%.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is further detailed explanation.
Prior art is classified and uses based on coking coal technological property, has technological propertyAfter close coking coal participates in coal-blending coking gained coke thermal response, intensity CSR differs 5 hundredThe situation of branch, as eight ore deposit coking coal and certain outer coking coal that covers, ature of coal technological property index, single kindCoal coking fibre structure composition measuring result, coal ash ash component analysis result, participate in coal blendingThe hot strength of Coal Blending Schemes and institute's coking charcoal is respectively in table 1～5.
The ature of coal technological property index of two kinds of coking coals of table 1
Single coal coking microstructure composition measuring result of planting of two kinds of coking coals of table 2
The coal ash ash component analysis result of two kinds of coking coals of table 3
The Coal Blending Schemes of the participation coal blending of two kinds of coking coals of table 4
Table 5 coke hot strength
| Coal Blending Schemes | CRI/％ | CSR/％ |
| 1 | 20.11 | 62.15 |
| 2 | 24.20 | 57.14 |
Can find out from table 1～5: the index of basicity STRENGTH ON COKE thermal response of coal, intensity effect veryGreatly, when coking coal is classified and is formulated Coal Blending Schemes, if do not considered the basicity of coking coalIndex, may cause coke quality to glide.
23 kinds of coking coals enter to have in certain factory, be numbered respectively A ore deposit, B ore deposit, C ore deposit, D ore deposit,E ore deposit, F ore deposit, G ore deposit, H ore deposit, I ore deposit, J ore deposit, K ore deposit, L ore deposit, M ore deposit, N ore deposit, OOre deposit, P ore deposit, R ore deposit, S ore deposit, T ore deposit, W ore deposit, X ore deposit, Y ore deposit, Z ore deposit, measure each listPlant the average maximum reflectivity of coking coalCharred coal organization structure, ash component, andCalculate index of basicity MBI, then its ature of coal is carried out to identification and classification, related data and classification knotFruit is in table 6.
The present invention is based on mensuration and ature of coal classification results in table 6, enter according to the scheme of table 7Go coal blending.
Carry out coal-blending coking according to the Coal Blending Schemes of table 7, without making firm by ramming, without coal damping, nothingMoulded coal, traditional 4.3 meters are pushed up above under dress coke oven dry coke quenching condition, adopt blending method of the present inventionCarry out coal-blending coking gained hot strength of coke CSR 60～70%, the index of basicity of cokeMBI is 2.5～2.8, cold strength M40At 85～89%, M105.5～7%.
Table 6 each single plant rank of coal metamorphism, coking optical texture, MBI and ature of coal classification
The Coal Blending Schemes of table 7 specific embodiment 1～3
Claims (3)
1. a blending method of controlling coking coal index of basicity, is characterized in that: comprise asLower step:
1) degree of coalification and the charred coal organization structure of mensuration coking coal, measure its ash component groupBecome, calculate its index of basicity;
2) according to degree of coalification, charred coal organization structure and index of basicity, coking coal is dividedClass;
2.1) forCoking coal: isotropism tissue with etc.Look district is less than the anisotropy of 2um and organizes sum >=65%, and index of basicity MBI≤2, are divided into111 classes; Isotropic tissue and isochrome district are less than the anisotropy of 2um and organize sum >=65%,Index of basicity MBI > 2, is divided into 112 classes; Isotropic tissue and isochrome district are less than 2um'sAnisotropy is organized sum < 65%, and index of basicity MBI≤2 are divided into 121 classes; Every sameProperty tissue and isochrome district are less than the anisotropy of 2um and organize sum < 65%, index of basicity MBI> 2, is divided into 122 classes;
2.2) forCoking coal: isochrome district is 2～7umAnisotropy tissue >=60%, index of basicity MBI≤2, are divided into 211 classes; Isochrome district isAnisotropy tissue >=60% of 2～7um, index of basicity MBI > 2, is divided into 212 classes;Isochrome district is that the anisotropy of 2～7um is organized < 60%, and index of basicity MBI≤2, are divided into221 classes; Isochrome district is that the anisotropy of 2～7um is organized < 60%, index of basicity MBI >2, be divided into 222 classes;
2.3) forCoking coal: isochrome district is 7～30umAnisotropy tissue >=55%, index of basicity MBI≤2, are divided into 311 classes; Isochrome district isAnisotropy tissue >=55% of 7～30um, index of basicity MBI > 2, is divided into 312 classes;Isochrome district is that the anisotropy of 7～30um is organized < 55%, and index of basicity MBI≤2, are divided into321 classes; Isochrome district is that the anisotropy of 7～30um is organized < 55%, index of basicity MBI> 2, is divided into 322 classes;
2.4) forCoking coal: silk carbon, fragmentation and isochromeDistrict is more than or equal to the anisotropy of 30um and organizes sum≤60%, index of basicity MBI≤2,Be divided into 411 classes; Silk carbon, fragmentation and isochrome district are more than or equal to the anisotropy tissue of 30umSum≤60%, index of basicity MBI > 2, is divided into 412 classes; Silk carbon, fragmentation and isochrome districtThe anisotropy that is more than or equal to 30um is organized sum > 60%, index of basicity MBI≤2,Be divided into 421 classes; Silk carbon, fragmentation and isochrome district are more than or equal to the anisotropy tissue of 30umSum > 60%, index of basicity MBI > 2, is divided into 422 classes;
3) all kinds of coking coals are carried out to adapted, 111 class coking coal allocation ratios 5～15%, 112Class coking coal allocation ratio 0～15%, 121 class coking coal allocation ratio 0～10%, 122 classesCoking coal allocation ratio 0～10%; 211 class coking coal allocation ratio 10～50%, 212 classes0～25%, 221 class coking coal allocation ratio 0～25%, the 222 class refinings of coking coal allocation ratioCoking coal allocation ratio 0～25%; 311 class coking coal allocation ratio 10～50%, 312 class refinings0～25%, 321 class coking coal allocation ratio 0～25%, the 322 class coking of coking coal allocation ratioCoal allocation ratio 0～15%; 411 class coking coal allocation ratio 5～25%, 412 class coking coalsAllocation ratio 0～15%, 421 class coking coal allocation ratio 0～15%, 422 class coking coals are joinedEnter ratio 0～10%; And control index of basicity MBI≤2 of mixed coal, charred coal organizationIt is 5～30% that the anisotropy that middle isotropism tissue and isochrome district are less than 2um is organized sum,Isochrome district is that the anisotropy of 2～7um is organized as 15～30%, and isochrome district is 7～30umAnisotropy be organized as 15～30%, silk carbon, fragmentation and isochrome district are more than or equal to 30umAnisotropy be organized as 30～40%.
2. the blending method of control coking coal index of basicity according to claim 1, itsBe characterised in that:
Described step 3) in, all kinds of coking coals are carried out to adapted as follows, 111 class refinings7～12%, 112 class coking coal allocation ratio 0～10%, the 121 class coking of coking coal allocation ratioCoal allocation ratio 0～8%, 122 class coking coal allocation ratios 0～7%; 211 class coking coals are joinedEnter ratio 13～35%, 212 class coking coal allocation ratio 0～20%, 221 class coking coals are joinedEnter ratio 5～20%, 222 class coking coal allocation ratios 0～21%; 311 class coking coals are allocated intoRatio 15～40%, 312 class coking coal allocation ratio 0～20%, 321 class coking coals are allocated intoRatio 5～20%, 322 class coking coal allocation ratios 0～10%; 411 class coking coals are allocated ratio intoExample 7～20%, 412 class coking coal allocation ratio 0～10%, 421 class coking coal allocation ratios0～10%, 422 class coking coal allocation ratios 0～7%.
3. the blending method of control coking coal index of basicity according to claim 1 and 2,It is characterized in that:
Described step 3) in, index of basicity MBI≤2 of control mixed coal, charred coal groupKnit anisotropy that middle isotropism tissue and isochrome district be less than 2um organize sum be 10～25%, the anisotropy that isochrome district is 2～7um is organized as 20～30%, and isochrome district is 7～The anisotropy of 30um is organized as 17～25%, and silk carbon, fragmentation and isochrome district are more than or equal toThe anisotropy of 30um is organized as 30～36%.
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