CN104140834B - Based on the coking coal divided method of coking property and the application in coal blending - Google Patents
Based on the coking coal divided method of coking property and the application in coal blending Download PDFInfo
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- 239000003245 coal Substances 0.000 title claims abstract description 297
- 238000004939 coking Methods 0.000 title claims abstract description 209
- 238000002156 mixing Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000008520 organization Effects 0.000 claims abstract description 18
- 238000005259 measurement Methods 0.000 claims abstract description 5
- 239000000571 coke Substances 0.000 claims description 50
- 239000000835 fiber Substances 0.000 claims description 38
- 239000011362 coarse particle Substances 0.000 claims description 27
- 239000002245 particle Substances 0.000 claims description 27
- 230000003287 optical effect Effects 0.000 claims description 26
- 239000004079 vitrinite Substances 0.000 claims description 18
- 230000004720 fertilization Effects 0.000 claims description 4
- 238000002310 reflectometry Methods 0.000 abstract description 11
- 238000010438 heat treatment Methods 0.000 description 4
- 235000010575 Pueraria lobata Nutrition 0.000 description 3
- 241000219781 Pueraria montana var. lobata Species 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- 241000764238 Isis Species 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000011335 coal coke Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000004484 Briquette Substances 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 206010016654 Fibrosis Diseases 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004761 fibrosis Effects 0.000 description 1
- 239000012458 free base Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
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Abstract
The invention discloses a kind of based on the coking coal divided method of coking property and the application in coal blending.The method comprises the steps: 1) determine the index affecting coking coal coking property; 2) the average maximum reflectivity of single coking coal is measured
with charred coal organization structure, and according to
Description
Technical Field
The invention belongs to the technical field of metallurgical coking, and particularly relates to a coking coal subdivision method based on coking property and application thereof in coal blending.
Background
Coking is a specific technical requirement for coal in the coking field. The concept of traditional coal chemistry on coking is defined as: under the coking condition of an industrial coke oven or a simulated industrial coke oven, the coal is formed into coke with certain lumpiness and strength, the definition is abstract, and the guidance on the coking coal blending practice is not strong. The international coal classification standard shows that the characteristics of the Aua expansion degree, the Kudzuvine index and the coke residue are internationally recognized coking indexes of the coal; in the field of domestic coal coke, the value of the caking index G, the value of the gelatinous layer thickness Y and the value of the Australian expansion degree b are considered as main indexes of coking property, wherein the value of the caking index G, the value of the gelatinous layer thickness Y and the value of the Australian expansion degree b are quantitative indexes, and the Kudzuvine index and the characteristics of coke residues are qualitative indexes. Because coal is an organic biological rock with very complicated composition and structure and extremely inhomogeneous, the indexes can only represent the process characteristics of one aspect of coking coal and can not reflect the quality difference between coal rock components and vitrinite components brought by coal plants and coal environments; the Auya swelling degree, the Kudzuvine index, the coke residue characteristic, the caking index G value and the colloidal layer thickness Y value are process characteristics expressed in a coal heating state, have apparent limitation and are not associated with the material basis, the coking behavior and the coking result of coal, so the coking property of the coking coal cannot be comprehensively and scientifically evaluated.
In the coking production practice, the coke strength obtained by coal with high single coal coking coke strength participating in coal blending coking is not necessarily high, so that the method has limitation. The reason for this is that: the coking property is judged by the coke strength of single coal, the material basis and the coking behavior of the coal source cannot be known, and the compatibility behavior between the coal source and other coal types cannot be characterized.
The item of Ru et al discloses a method for evaluating the coal quality of coking coal with the volatile component between 27 and 29 percent (patent number ZL201010599983.7), which has a certain reference function on the classification of special coal types with the volatile component between the coking coal and 1/3 coking coal, but the method is also easy to have misjudgment phenomena: for example, the indonesian coal in example 2 of the present invention: the dry ash-free base volatile content (Vdaf) is 27.96%, the maximum thickness (Y) of the colloidal layer is 21mm, and the average maximum reflectivity of the vitrinite is 1.15%; a sticking index G value of 95; determination of Kirschner flow: the initial softening temperature is 410 ℃, the maximum fluidity temperature is 460 ℃, and the maximum Gieseler fluidity is 2 ddpm; after single coal is coked, the coarse grains of the microstructure of the single coal are inlaid to 70 percent, and the single coal is judged to be coking coal. Firstly, the coal is special cause coal, the vitrinite content is as high as 98 percent, the G value is high, but the vitrinite property is special, the high-temperature flow performance is poor, the maximum value of the Gieseler fluidity is only 2ddpm, the focusing optical microstructure is easy to judge as a coarse grain structure, actually, the size of an optical isochromatic zone of the coarse grain structure is far larger than 5-10 um of the coarse grain structure, the coarse grain structure is converted into fibrosis, the actual coarse grain mosaic structure is smaller than 60 percent, and the Indonesian coal is judged as 1/3 coking coal according to the set classification method. However, when 1/3 is blended with coking coal, the blending effect is not very good. In addition, because parameters such as softening temperature, a solid-soft temperature interval, maximum fluidity and the like contained by the Gieseler fluidity index are associated with chemical reaction processes such as pyrolysis of coal macromolecules, formation and growth of mesophase spherule in the coking process, and a test method and equipment are standardized, the data accuracy is high, according to the existing mesophase spherule theory of coal coke conversion, the higher Gieseler fluidity is beneficial to the generation and growth of the mesophase spherule, namely the formation of an optical anisotropic organization structure, the invention takes the conditions that the maximum value of the Gieseler fluidity is less than 1500ddpm and the coarse grain mosaic structure reaches more than 60 percent after single coal is coked as parallel conditions, and the deterioration degree index volatile matter is between 27 and 29 percent, which is contradictory from the technical principle, so the application range is limited. In addition, the coal mixing in the coal market is serious at present, for example, the coal mixing of a certain poor enterprise (a large amount of fat coal and lean coal are mixed for sale for a long time), the volatile matter is 27.23 percent, the average maximum reflectivity of vitrinite is 1.24 percent, the G value is 89, the maximum thickness (Y) of a colloidal layer is 21mm, the initial softening temperature is 396 ℃, the maximum fluidity temperature is 443 ℃, and the maximum value of the Gieseler fluidity is 15599 ddpm; 55% of coarse grain mosaic structure after single coal coking. According to the classification method of the present invention, 1/3 coking coals are classified, but if the coals obtained by blending fat coals and lean coals are used in large quantities as 1/3 coking coals, the lean coals contained therein tend to cause the proportion of high-quality metamorphic coals in the blending coals to be too high to affect the wear resistance of cokes, or the proportion of fat coals to be too high to cause the porosity of cokes to be too high.
Because the coking performance of coking coal, 1/3 coking coal, fat coal, gas fat coal, lean coal and gas coal classified according to the prior art can not be accurately represented especially in the coking performance of blended coal, and the coking performance is the most main performance of coking coal, the main indexes influencing the coking coal are fully known and mastered, and the coal blending is guided according to classification, thereby having important significance for the field of metallurgical coking.
Disclosure of Invention
The invention aims to solve the technical problem of providing a coking coal subdivision method based on coking property.
The invention aims to solve another technical problem of providing an application of a coking coal subdivision method based on coking property in coal blending.
In order to solve the first technical problem, the technical scheme adopted by the invention comprises the following steps:
1) determining indexes influencing coking property of coking coal:
11) coking coal coalification degree is inThe coking coal with low metamorphism degree generates a large amount of volatile gas in the process of heating to generate the colloid, and the accuracy of the measured value of the Gieseler maximum fluidity is influenced, so that the average maximum reflectivity of the vitrinite is determinedThe solid-soft temperature interval and the coke optical organization structure are coking indexes of coking coal;
12) when in useAverage maximum reflectance of vitriniteThe Gieseler maximum fluidity and the coke optical tissue structure are determined as the indexes of coking property of the coking coal;
13) when in useBecause the colloid body generated by heating the coking coal is viscous, the Gieseler fluidity index no longer has guiding significance, and the average maximum reflectivity of vitrinite is adoptedAnd determining the optical organization structure of the coke as an index of coking property of the coking coal;
2) determination of the average maximum reflectance of individual coking coalsAnd coke optical texture when the average maximum reflectance of a single coking coal isIs composed ofThen, the solid-soft temperature interval of the single coking coal is determined again, and when the average maximum reflectivity of the single coking coal is determinedIs composed ofThen, the Gieseler maximum fluidity of the single coking coal is measured, and the average maximum reflectance of the single coking coal is measuredIs composed ofNo other indexes are measured;
3) according to the measurement result of the step 2), the following classification is carried out:
31) when in useThe solid-soft temperature interval is less than 80 ℃, and the sum of the isotropic structure and the inert structure in the coke optical organization structure is less than 50 percent and is classified as gas coal 1 #;
when in useThe solid-soft temperature interval is less than 80 ℃, the sum of the isotropic structure and the inert structure in the coke optical organization structure is more than or equal to 50 percent, and the coke optical organization structure is classified as gas coal 2 #;
32) when in useAnd the solid-soft temperature interval is more than or equal to 95 ℃, and the coal is classified as gas fat coal;
33) when in useAnd the solid-soft temperature interval is more than or equal to 80 ℃ and less than 95 ℃, and the classification is 1/3 coking coal 1 #;
when in useAnd the solid-soft temperature interval is more than or equal to 80 ℃ and less than 100 ℃, and the classification is 1/3 coking coal 2 #;
when in useAnd the solid-soft temperature interval is less than 80 ℃, and the classification is 1/3 coking coal 3 #;
34) when in useThe solid-soft temperature interval is more than or equal to 100 ℃, and the coal is classified as fat coal 1 #;
when in useThe solid-soft temperature interval is more than or equal to 100 ℃, and the coal is classified as fat coal 2 #;
35) when in use1gMF is more than 2.50, and when the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is more than or equal to 60 percent, the coal is classified as coking coal No. 1;
when in use1gMF is more than 2.50, and when the sum of the content of medium particle mosaic, coarse particle mosaic and incomplete fiber component is less than 60%, the coal is classified as coking coal 2 #;
when in use1.50 is more than 1gMF and less than or equal to 2.50, and when the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is more than or equal to 60 percent, the coal is also classified as coking coal 2 #;
when in use1.50 is more than 1gMF and less than or equal to 2.50, and when the sum of the content of medium grain inlaying, coarse grain inlaying and incomplete fiber component is less than 60%, the coal is classified as coking coal No. 3;
when in use1gMF is less than or equal to 2.50, and when the sum of the content of medium particle mosaic, coarse particle mosaic and incomplete fiber component is less than 40%, the coke is classified as No. 4;
when in use1gMF is not more than 1.50, and when the sum of the contents of medium-grain inlaid, coarse-grain inlaid and incomplete fiber components is not less than 40%, the coke is also classifiedCoal 3 #;
when in useAnd when the sum of the content of medium particle mosaic, coarse particle mosaic and incomplete fiber components is more than or equal to 50%, the coal is also classified as coking coal No. 1;
when in useAnd when the sum of the content of medium grain mosaic which is more than or equal to 40 percent and the content of coarse grain mosaic and incomplete fiber components is less than 50 percent, the coke is also classified as No. 2 coke;
when in useAnd when the sum of the content of medium particle mosaic, coarse particle mosaic and incomplete fiber components is less than 40%, the coal is also classified as coking coal No. 3;
36) when in useAnd when the content of the coarse grain mosaic component is more than or equal to 20 percent, the coarse grain mosaic component is classified as lean coal No. 1;
when in useWhen the content of the coarse grain mosaic component is less than 20%, the coarse grain mosaic component is classified as lean coal No. 2.
In order to solve the second technical problem, the technical scheme adopted by the invention comprises the following steps:
1) determination of the average maximum reflectance of individual coking coalsAnd coke optical texture when the average maximum reflectance of a single coking coal isIs composed ofThen, the solid-soft temperature interval of the single coking coal is determined again, and when the average maximum reflectivity of the single coking coal is determinedIs composed ofThen, the Gieseler maximum fluidity of the single coking coal is measured, and the average maximum reflectance of the single coking coal is measuredIs composed ofNo other indexes are measured;
2) according to the measurement result of the step 1), coal blending is carried out according to the following scheme:
gas coal 1 #:the solid-soft temperature interval is less than 80 ℃, and the sum of the isotropic structure and the inert structure in the coke optical organization structure is less than 50 percent of the coking coal, and the blending proportion is 0-25 percent;
gas coal 2 #:the solid-soft temperature interval is less than 80 ℃, and the sum of the isotropic structure and the inert structure in the coke optical organization structure is more than or equal to 50 percent, and the blending proportion is 0-15 percent;
gas fertilization of coal:and the blending proportion of the coking coal with the solid-soft temperature interval of more than or equal to 95 ℃ is 0-20 percent;
1/3 coking coal 1 #:and the coking coal with the temperature range of between 80 and 95 ℃ is mixed in the proportion of 0 to 40 percent;
1/3 coking coal 2 #:and the coking coal with the temperature range of between 80 ℃ and less than 100 ℃ is mixed in the proportion of 0 to 20 percent;
1/3 coking coal 3 #:and the coking coal with the solid-soft temperature interval of less than 80 ℃ is mixed in the proportion of 0-20 percent;
fat coal 1 #:and the blending proportion of the coking coal with the solid-soft temperature interval more than or equal to 100 ℃ is 0-20%;
fat coal 2 #:and the blending proportion of the coking coal with the solid-soft temperature interval more than or equal to 100 ℃ is 0-30%;
1# of coking coal:1gMF is more than 2.50, and the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is more than or equal to 60 percent, and the blending proportion is 10-40 percent; or,the sum of the contents of medium particle inlaying, coarse particle inlaying and incomplete fiber components is more than or equal to 50%, and the blending proportion is 10-40%;
coking coal 2 #:1gMF is more than 2.50, and the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is less than 60 percent, and the blending proportion is 0-40 percent; or,1.50 is more than 1gMF and less than or equal to 2.50, and the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is more than or equal to 60 percent, and the blending proportion is 0-40 percent; or,the coking coal which meets the requirement that the sum of the content of medium particle inlaying is more than or equal to 40 percent, the content of coarse particle inlaying and the content of incomplete fiber components is less than 50 percent is added in a proportion of 0-40 percent;
3# of coking coal:1.50 is more than 1gMF and less than or equal to 2.50, and the coking coal which satisfies the requirement that the sum of the content of medium grain inlaying, coarse grain inlaying and incomplete fiber component is less than 60 percent is added in a proportion of 0-20 percent; or,1gMF is less than or equal to 1.50, and the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is more than or equal to 40 percent, and the blending proportion is 0-20 percent; or,and the sum of the content of medium particle mosaic, coarse particle mosaic and incomplete fiber components is less than 40 percent, and the blending proportion is 0-20 percent;
4# of coking coal:1gMF is less than or equal to 2.50, and the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is less than 40 percent, and the blending proportion is 0-10 percent;
lean coal 1 #:and the content of coarse grain mosaic components is more than or equal to 20 percent, and the blending proportion is 0-30 percent;
lean coal 2 #:the coking coal with the coarse grain mosaic component content less than 20 percent is blended in a proportion of 0 to 20 percent;
and satisfies the following conditions: the content sum of the coking coal 1# and the coking coal 2# is more than or equal to 20 percent, and the content sum of the 1/3 coking coal 1#, the fat coal 2#, the coking coal 1# and the coking coal 2# is more than or equal to 40 percent.
Further, in the step 3), coal blending is carried out according to the following scheme:
gas coal 1 #:the solid-soft temperature interval is less than 80 ℃, and the sum of the isotropic structure and the inert structure in the coke optical organization structure is less than 50 percent, and the blending proportion is 5-15 percent;
gas coal 2 #:the solid-soft temperature interval is less than 80 ℃, and the sum of the isotropic structure and the inert structure in the coke optical organization structure is more than or equal to 50 percent, and the blending proportion is 0-10 percent;
gas fertilization of coal:and the blending proportion of the coking coal with the solid-soft temperature interval of more than or equal to 95 ℃ is 5-10 percent;
1/3 coking coal 1 #:and the coking coal with the temperature range of between 80 and 95 ℃ is mixed in the proportion of 5 to 20 percent;
1/3 coking coal 2 #:and the coking coal with the temperature range of between 80 ℃ and less than 100 ℃ is mixed in the proportion of 0-10 percent;
1/3 coking coal 3 #:and the coking coal with the solid-soft temperature interval of less than 80 ℃ is mixed in the proportion of 0-10 percent;
fat coal 1 #:and the blending proportion of the coking coal with the solid-soft temperature interval more than or equal to 100 ℃ is 5-10 percent;
fat coal 2 #:and the blending proportion of the coking coal with the solid-soft temperature interval more than or equal to 100 ℃ is 5-20%;
1# of coking coal:1gMF is more than 2.50, and the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is more than or equal to 60 percent, and the blending proportion is 10-25 percent; or,the sum of the contents of medium particle inlaying, coarse particle inlaying and incomplete fiber components is more than or equal to 50%, and the blending proportion is 10-25%;
coking coal 2 #:1gMF is more than 2.50, and the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is less than 60 percent, and the blending proportion is 5-25 percent; or,1.50 is more than 1gMF and less than or equal to 2.50, and the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is more than or equal to 60 percent, and the blending proportion is 5-25 percent; or,and the coking coal which meets the requirement that the sum of the content of medium particle inlaying is more than or equal to 40 percent and the content of coarse particle inlaying and incomplete fiber component is less than 50 percent is blended in a proportion of 5-25 percent;
3# of coking coal:1.50 is more than 1gMF and less than or equal to 2.50, and the coking coal which satisfies 40 percent and less than the sum of the contents of medium grain mosaic, coarse grain mosaic and incomplete fiber components is less than 60 percent is blended in a proportion of 5-15 percent; or,1gMF is less than or equal to 1.50, and the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is more than or equal to 40 percent, and the blending proportion is 5-15 percent; or,and the sum of the content of medium particle mosaic, coarse particle mosaic and incomplete fiber components is less than 40 percent, and the blending proportion is 5-15 percent;
4# of coking coal:1gMF is less than or equal to 2.50, and the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is less than 40 percent, and the blending proportion is 0-5 percent;
lean coal 1 #:and the content of coarse grain mosaic components is more than or equal to 20 percent, and the blending proportion is 5-20 percent;
lean coal 2 #:the coking coal with the coarse grain mosaic component content less than 20 percent is mixed in a proportion of 0 to 10 percent.
And the sum of the coking coal 1# and the coking coal 2# is more than or equal to 20 percent, and the sum of the 1/3 coking coal 1#, the fat coal 2#, the coking coal 1# and the coking coal 2# is more than or equal to 40 percent.
The invention has the following advantages:
1) the classification index adopts vitrinite average maximum reflectivityThe maximum Gieseler fluidity, the solid-soft temperature interval and the coke optical organization structure, and overcomes the existing classification indexes: volatile component VdafThe apparent limitations of the value G of the bonding index, the value Y of the thickness of the colloidal layer and the value b of the Australian expansion degree are avoided, and the indexes are prevented from being various and interfering with each other; and is in the coal degreeThe coking coal with low metamorphism degree generates a large amount of volatile gas in the process of heating to generate the colloid, and the accuracy of the measured value of the Gieseler maximum fluidity is influenced, so that the average maximum reflectivity of the vitrinite is determinedThe solid-soft temperature interval and the coke optical organization structure are coking indexes of coking coal; for theThe coking coal with high metamorphism degree has no guiding significance due to the fact that the heated colloidal body is viscous and the Gieseler fluidity index no longer has guiding significance, and the vitrinite average maximum reflectivity is adoptedAnd the optical structure of the coke is determined as the coking property of the coking coalThe index of (1).
2) The gas coal is subdivided into gas coal No. 1 and gas coal No. 2, so that the gas coal resource is reasonably utilized, and the coal blending cost is reduced.
3) The coking coal is a key coal type for coking, and is divided into 4 types, so that the coke quality is guaranteed, and the coking coal resource is effectively utilized. Will be provided with1gMF is more than 2.50, and satisfies the requirement that the sum of the contents of medium-grained mosaic, coarse-grained mosaic and incomplete fiber components is more than or equal to 60%, andand the coking coal which meets the condition that the sum of the contents of medium particle inlaying, coarse particle inlaying and incomplete fiber components is more than or equal to 50 percent is cut into 1# coking coal; is beneficial to the reasonable utilization of coking coal resources, saves high-quality coking coal resources and reduces the coal blending cost.
4) The coke quality is ensured on the premise of low-cost coal blending by setting the lower limit of the proportion of key coking coals and setting the lower limit of the proportion of coking coals, wherein the coking coal 1# is more than or equal to 10%, the sum of the coking coal 1# and the coking coal 2# is more than or equal to 20%, and the sum of the 1/3 coking coal 1#, the fat coal 2#, the coking coal 1# and the coking coal 2# is more than or equal to 40%.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to specific embodiments.
22 kinds of coking coal are added into a certain factory, and are respectively numbered as A ore (Zao xi ore), B ore (other ore), C ore (Australia ore), D ore (Dongdu ore), E ore (Longgu ore), F ore (Qiyan ore), G ore (Huainan ore), H ore (Fucun ore), I ore (Dushi ore), J ore (Wang Hui ore), K ore (Qingtong ore), L ore (eight ore), M ore (Pingyao ore), N ore (Zhang ore), O ore (Congjie ore), P ore (New shop ore), Q ore (lower Yukou ore), R ore (Heliantou ore), S ore (Baibeiguan ore), T ore (separation ore), U ore (Shunjiang ore) and V ore (Mongolia ore), and the average maximum reflectivity of each single coking coal is respectively measuredGibber maximum fluidity, solid-soft temperature interval and coke optical structure, the results are given in Table 1:
TABLE 1 index and classification of coking coal affected by single coal
Based on the measurement results, classification was performed, and the classification results are shown in Table 1.
Based on the classification results, the invention carries out coal blending, and the specific embodiment of the coal blending is shown in Table 2.
Table 2 example of coal blending process
The classification methods of coal types described in Table 2 are the classification methods of the coking coal of the present invention.
According to the traditional powder-after-preparation process, no pre-crushing and selective crushing, no coal moisture control and no coal briquette, and under the traditional dry quenching condition of a top-loading coke oven with the length of more than 4.3 meters, the coke heat intensity CSR obtained in the above examples 1, 2, 3 and 4 is 65-70%, and M is M4087-89%, M105.5 to 6.3 percent.
Although the invention has been described in connection with only a select list of specific embodimentsThe coal types are classified and blended according to the method of the invention, and the thermal strength CSR of the coke obtained by coking is 65-70%, M is4087-89%, M105.5 to 6.3 percent.
Claims (3)
1. A coking coal subdivision method based on coking is characterized in that: the method comprises the following steps:
1) determining indexes influencing coking property of coking coal:
11)determining the average maximum reflectance of vitrinite from the coking coal with low metamorphism degreeThe solid-soft temperature interval and the coke optical organization structure are coking indexes of coking coal;
12)the average maximum reflectance of vitrinite is determinedThe Gieseler maximum fluidity and the coke optical tissue structure are determined as the indexes of coking property of the coking coal;
13)the average maximum reflectance of vitrinite is determinedAnd determining the optical organization structure of the coke as an index of coking property of the coking coal;
2) determination of vitrinite average maximum reflectance of individual coking coalsAnd coke optical texture structure, when the average maximum reflectance of vitrinite of single coking coalIs composed of Then, the solid-soft temperature interval of the single coking coal is determined, and when the vitrinite average maximum reflectance of the single coking coal is measuredIs composed ofThen, the Gieseler maximum fluidity of the single coking coal is measured, and the average maximum reflectance of the vitrinite of the single coking coal is measuredIs composed ofNo other indexes are measured;
3) based on the measurement results of step 2), the following subdivision was made:
31) when in useThe solid-soft temperature interval is less than 80 ℃, and the sum of the isotropic structure and the inert structure in the coke optical organization structure is less than 50 percent and is classified as gas coal 1 #;
when in useThe solid-soft temperature interval is less than 80 ℃, the sum of the isotropic structure and the inert structure in the coke optical organization structure is more than or equal to 50 percent, and the coke optical organization structure is classified as gas coal 2 #;
32) when in useAnd the solid-soft temperature interval is more than or equal to 95 ℃, and the coal is classified as gas fat coal;
33) when in useAnd the solid-soft temperature interval is more than or equal to 80 ℃ and less than 95 ℃, and the classification is 1/3 coking coal 1 #;
when in useAnd the solid-soft temperature interval is more than or equal to 80 ℃ and less than 100 ℃, and the classification is 1/3 coking coal 2 #;
when in useAnd the solid-soft temperature interval is less than 80 ℃, and the classification is 1/3 coking coal 3 #;
34) when in useThe solid-soft temperature interval is more than or equal to 100 ℃, and the coal is classified as fat coal 1 #;
when in useThe solid-soft temperature interval is more than or equal to 100 ℃, and the coal is classified as fat coal 2 #;
35) when in uselgMF is more than 2.50, and when the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is more than or equal to 60%, the coke is classified as 1 #;
when in uselgMF is more than 2.50, and when the sum of the contents of medium particle mosaic, coarse particle mosaic and incomplete fiber components is less than 60%, the coke is classified as 2 #;
when in uselgMF of more than 1.50 and less than or equal to 2.50, and when the sum of the contents of medium grain mosaic, coarse grain mosaic and incomplete fiber components is more than or equal to 60%, the coke is also classified as No. 2 coke;
when in use1.50 < lgMF < 2.50, and is classified as coking coal # 3 when the sum of the contents of medium grain mosaic, coarse grain mosaic and incomplete fiber components is < 60%;
when in uselgMF is less than or equal to 2.50, and when the sum of the contents of medium grain mosaic, coarse grain mosaic and incomplete fiber components is less than 40%, the coke is classified as 4 #;
when in uselgMF is less than or equal to 1.50, and when the sum of the contents of medium grain mosaic, coarse grain mosaic and incomplete fiber components is more than or equal to 40%, the coal is also classified as coking coal # 3;
when in useAnd when the sum of the content of medium particle mosaic, coarse particle mosaic and incomplete fiber components is more than or equal to 50%, the coal is also classified as coking coal No. 1;
when in useAnd when the sum of the content of medium grain mosaic which is more than or equal to 40 percent and the content of coarse grain mosaic and incomplete fiber components is less than 50 percent, the coke is also classified as No. 2 coke;
when in useAnd when the sum of the content of medium particle mosaic, coarse particle mosaic and incomplete fiber components is less than 40%, the coal is also classified as coking coal No. 3;
36) when in useAnd when the content of the coarse grain mosaic component is more than or equal to 20 percent, the coarse grain mosaic component is classified as lean coal No. 1;
when in useWhen the content of the coarse grain mosaic component is less than 20%, the coarse grain mosaic component is classified as lean coal No. 2.
2. The use of the coking coal subdivision method based on coking property in coal blending according to claim 1, characterized in that: the single coal comprises the following components in percentage by weight:
gas coal 1 #: 0 to 25 percent; gas coal 2 #: 0 to 15 percent; gas fertilization of coal: 0 to 20 percent; 1/3 coking coal 1 #: 0-40%; 1/3 coking coal 2 #: 0 to 20 percent; 1/3 coking coal 3 #: 0 to 20 percent; fat coal 1 #: 0 to 20 percent; fat coal 2 #: 0 to 30 percent; 1# of coking coal: 10-40%; coking coal 2 #: 0-40%; 3# of coking coal: 0 to 20 percent; 4# of coking coal: 0 to 10 percent; lean coal 1 #: 0 to 30 percent; lean coal 2 #: 0 to 20 percent;
and satisfies the following conditions: the content sum of the coking coal 1# and the coking coal 2# is more than or equal to 20 percent, and the content sum of the 1/3 coking coal 1#, the fat coal 2#, the coking coal 1# and the coking coal 2# is more than or equal to 40 percent.
3. The use of a coking coal refinement process based on coking property according to claim 2 in coal blending, characterized in that: the single coal comprises the following components in percentage by weight:
gas coal 1 #: 5-15%; gas coal 2 #: 0 to 10 percent; gas fertilization of coal: 5-10%; 1/3 coking coal 1 #: 5-20%; 1/3 coking coal 2 #: 0 to 10 percent; 1/3 coking coal 3 #: 0 to 10 percent; fat coal 1 #: 5-10%; fat coal 2 #: 5-20%; 1# of coking coal: 10-25%; coking coal 2 #: 5-25%; 3# of coking coal: 5-15%; 4# of coking coal: 0 to 5 percent; lean coal 1 #: 5-20%; lean coal 2 #: 0 to 10 percent.
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| CN104818039B (en) * | 2015-04-17 | 2018-01-12 | 武汉钢铁有限公司 | The application method of the low rotten coking coal of fugitive constituent Vdaf >=30% |
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| CN105131996B (en) * | 2015-09-02 | 2017-11-17 | 武汉钢铁有限公司 | The application method of mixture coking coal |
| CN109102035B (en) * | 2018-09-11 | 2022-03-04 | 辽宁科技大学 | Clustering analysis-based coking coal multi-dimensional index similarity refined classification method |
| CN109439357A (en) * | 2018-10-23 | 2019-03-08 | 武汉钢铁有限公司 | The method for the coal-blending coking that rich coal participates in |
| CN110257094A (en) * | 2019-07-10 | 2019-09-20 | 成渝钒钛科技有限公司 | A method of optimizing allocation of resources reduces coal blending cost |
| 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 |
| CN111029576B (en) * | 2019-11-12 | 2023-09-29 | 山西沁新能源集团股份有限公司 | Method for blending crystalline carbon precursor coal |
| CN111732964A (en) * | 2020-07-04 | 2020-10-02 | 拜城县峰峰煤焦化有限公司 | Formula for refining metallurgical coke from local coal in Xinjiang |
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