CN104745217A - Blending method of high-metamorphous coking coal - Google Patents
Blending method of high-metamorphous coking coal Download PDFInfo
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- CN104745217A CN104745217A CN201510152069.0A CN201510152069A CN104745217A CN 104745217 A CN104745217 A CN 104745217A CN 201510152069 A CN201510152069 A CN 201510152069A CN 104745217 A CN104745217 A CN 104745217A
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Abstract
The invention discloses a blending method of high-metamorphous coking coal. According to the preparation method, through the synergistic effect of high-metamorphous coking coal and gas coal or one third coking coal, the incomplete fiber textures and complete fiber textures of the high-metamorphous coking coal interact with isomorphism and fine grain embedded textures of the gas coal or one third coking coal so as to be converted into crude grain embedded texture and medium-grain embedded texture, wherein in the high-metamorphous coking coal, Rmax ranges from 1.35% to 1.55%, the sum of more than or equal to 60% of crude grain embedded components and incomplete fiber texture is more than or equal to 47%, and the sum of less than or equal to 20% of complete fiber and lamellar structure is more than or equal to 12%, and in the gas coal or one third coking coal, the Rmax ranges from 0.60% to 0.85%, the sum of isomorphism and fine grain embedded components is more than or equal to 55%; and through the coal blending for coking, not only can the coal blending cost be effectively lowered, but also the coke has higher cold-state and hot-state strength.
Description
Technical field
The invention belongs to metallurgical coking technology field, be specifically related to a kind of application method of high rotten coking coal.
Background technology
Though coal resources in China is abundanter, coking coal only accounts for 25% ~ 27%, and high-quality caking coal is more rare, and its Economical mineability amount only accounts for 4.48% of coking coal resource total amount.
For meeting growing blast furnace production capacity needs, the coke-oven plant such as Ma Gang, this steel, Baosteel, Anshan iron and steel plant, Sha Gang, Liu Gang all from before and after 2005 from overseas import coking coal.In overseas coal supply base, Australia is the maximum coking coal export State in the whole world, with a very important position on international coal market.China from 1,000,000 tons in 2008 from Australian import coking coal total amount, is increased to 2,100 ten thousand tons of first three quarters in 2014, accounts for about 50% of coking coal import total amount.Ripple basin, Queensland ,Australia area Sa Aji coking coal metamorphic grade is high, and swelling property and the liquidity scale are worse than Feng Jingkuang, she draws vara ore deposit and Gong Yela ore deposit coking coal, belong to BHP company two wires coking coal.
The domestic higher metamorphic grade coking coal suitable with Sa Aji coking coal degree of coalification has: the bent ore deposit, west of Shanxi Xishan coal electricity company and the coking coal of throughput forecast, the Jiexiu coking coal, two of Fenxi Mining Group crosses coking coal, converts town high-sulfur coking coal, Qinshui coalfield part coking coal, Yuci area portion coking coal, Eastern Shansi Zuoquan County part coking coal, the part coking coal such as Lvliang City Hedong Coalfield, Xishan coalfield, Huo Xi coalfield, Linfen Prefecture Zhang Li, Gu County's part coking coal.
The coking coal that above-mentioned metamorphic grade is higher has common feature: caking index is lower than 80, and coarse grain is inlayed and incomplete fibrous tissue sum >=47%, complete fiber and lamellar structure sum >=12%, and mobility and swelling property are all low, is referred to as high rotten coking coal.Carry out as follows for the go bad use of coking coal of height at present: the height that it is 47% ~ 50% that coarse grain is inlayed with the incomplete fibrous tissue sum coking coal that goes bad uses as coking coal inferior, the height that it is 50% ~ 60% that coarse grain is inlayed with the incomplete fibrous tissue sum coking coal that goes bad uses as general coking coal.Above-mentioned using method is not owing to recognizing the singularity of high rotten coking coal resource, the high rotten Coal Characteristics of coking coal and the synergy of other coals can not be made full use of, wasting phenomenon is existed to the use of such resource, is unfavorable for reducing enterprise's coal blending cost and promoting coking industry Sustainable development.
Summary of the invention:
The technical problem to be solved in the present invention is to provide a kind of application method of high rotten coking coal, with the rotten coking coal resource of Appropriate application height, thus reduces coal blending cost and improves coke quality.
For solving the problems of the technologies described above, the technical solution used in the present invention comprises the steps:
1) determine that each single coking coal coal participating in coal blending is high rotten coking coal, collaborative coal, medium metamorphic grade coking coal, high rotten 1/3 coking coal, rich coal and lean coal, the described height coking coal that goes bad is
between 1.35% ~ 1.55%, 60%>=coarse grain inlays component and incomplete fibrous tissue sum>=47%, the 20%>=coking coal of fiber and lamellar structure sum>=12% completely, and described collaborative coal is
between 0.60% ~ 0.85%, the same sex and particulate inlay bottle coal or 1/3 coking coal of component sum>=55%, and described medium metamorphic grade coking coal is the average maximum reflectivity of vitrinite
be 1.15% ~ 1.35%, coarse grain inlays the coking coal of component concentration>=40%, and rotten 1/3 coking coal of described height is the average maximum reflectivity of vitrinite
be 0.85% ~ 1.15%, granular 1/3 coking coal inlaying component concentration sum>=60%;
2) determine that the weight percent of each single coking coal in mixed coal is: the amount of allocating into of high rotten coking coal is 20 ~ 55%; The amount of allocating into of collaborative coal is 10% ~ 40%; The medium metamorphic grade coking coal amount of allocating into is 0 ~ 20%, and the high rotten 1/3 coking coal amount of allocating into is 10% ~ 20%, and the rich coal amount of allocating into is 7% ~ 20%, and the lean coal amount of allocating into is 0% ~ 15%.
Further, described step 1) in the coarse grain of high rotten coking coal inlays that component is 47% ~ 50% with incomplete fibrous tissue component sum, complete fiber and lamellar structure sum be 12% ~ 17%, it is 60% ~ 70% that the same sex of described collaborative coal and particulate inlay component sum; The weight percent of each single coking coal in mixed coal is: the amount of allocating into of high rotten coking coal is 20% ~ 40%; The amount of allocating into of collaborative coal is 10% ~ 30%; The medium metamorphic grade coking coal amount of allocating into is 10% ~ 20%, and the high rotten 1/3 coking coal amount of allocating into is 15% ~ 20%, and the rich coal amount of allocating into is 10% ~ 15%, and the lean coal amount of allocating into is 5% ~ 10%.
The present inventor finds that through studying for a long period of time the same sex of incomplete fibrous tissue in high rotten coking coal and complete fibrous tissue and bottle coal or low 1/3 coking coal that goes bad and particulate mosaic structure can act synergistically, be converted into coarse grain mosaic structure and Zhong Li mosaic structure, therefore height goes bad coking coal and bottle coal or low rotten 1/3 coking coal adapted simultaneously by the present invention, the coke of refining not only has higher cold conditions and hot strength, effectively can also reduce coal blending cost simultaneously.Powder craft after tradition is first joined, without precomminution and selective molecular attraction, without coal damping, without moulded coal, under the dress coke oven dry coke quenching condition of tradition more than 4.3 meters top, gained hot strength of coke CSR of the present invention is adopted to be stabilized in 65 ~ 70%, M40 can be stabilized in 87 ~ 91%, M10 can be stabilized in 5.0 ~ 6.5%.
Embodiment
Below in conjunction with embodiment, the present invention is further detailed explanation.
There are 9 kinds of coking coals in certain factory, is numbered 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, determines the average maximum reflectivity of each single coking coal respectively
with single grade coal coking charred coal organization, its coal is judged, and carries out adapted as follows:
1) determine that each single coking coal coal participating in coal blending is high rotten coking coal, collaborative coal, medium metamorphic grade coking coal, high rotten 1/3 coking coal, rich coal and lean coal, the described height coking coal that goes bad is
between 1.35% ~ 1.55%, 60%>=coarse grain inlays component and incomplete fibrous tissue sum>=47%, the 20%>=coking coal of fiber and lamellar structure sum>=12% completely, and described collaborative coal is
between 0.60% ~ 0.85%, the same sex and particulate inlay bottle coal or 1/3 coking coal (i.e. low rotten 1/3 coking coal) of component sum>=55%, and described medium metamorphic grade coking coal is the average maximum reflectivity of vitrinite
be 1.15% ~ 1.35%, coarse grain inlays the coking coal of component concentration>=40%, and rotten 1/3 coking coal of described height is the average maximum reflectivity of vitrinite
be 0.85% ~ 1.15%, granular 1/3 coking coal inlaying component concentration sum>=60%;
2) determine that the weight percent of each single coking coal in mixed coal is: the amount of allocating into of high rotten coking coal is 20 ~ 55%; The amount of allocating into of collaborative coal is 10% ~ 40%; The medium metamorphic grade coking coal amount of allocating into is 0 ~ 20%, and the high rotten 1/3 coking coal amount of allocating into is 10% ~ 20%, and the rich coal amount of allocating into is 7% ~ 20%, and the lean coal amount of allocating into is 0% ~ 15%.
Each ore deposit point coking coal
the judgement of charred coal organization structure, coal and price are in table 1, the present invention and the concrete Coal Blending Schemes of prior art and coal blending cost are in table 2, the present invention and prior art mixed coal coking optical texture calculate sum with measured result in table 3, test coke cold and hot state intensity in table 4.
Table 1 single grade coal
coal, coking optical texture and price
Table 2 Coal Blending Schemes and cost
Table 3 mixed coal coking optical texture calculates sum and measured result
Coke cold and hot state intensity tested by table 4
| Scheme | M25/％ | M10/％ | CRI/％ | CSR/％ |
| Coal Blending Schemes embodiment 1 of the present invention | 90.84 | 5.30 | 17.92 | 68.33 |
| Coal Blending Schemes embodiment 2 of the present invention | 90.35 | 5.51 | 18.13 | 67.75 |
| Coal Blending Schemes embodiment 3 of the present invention | 90.59 | 5.72 | 18.57 | 68.12 |
| Prior art Coal Blending Schemes | 89.37 | 6.48 | 20.86 | 65.35 |
As can be seen from Table 2, Coal Blending Schemes of the present invention comparatively prior art can effectively reduce costs.As can be seen from Table 3, because go bad coking coal G ore deposit and bottle coal A ore deposit and/or low rotten 1/3 coking coal B ore deposit of height can act synergistically, incomplete fibrous tissue and complete fibrous tissue and the same sex and particulate mosaic structure interact, be converted into coarse grain mosaic structure and Zhong Li mosaic structure, therefore, what the coarse grain mosaic structure surveyed in mixed coal and Zhong Li mosaic structure comparatively calculated significantly wants high, can obtain higher cold conditions and hot strength during refining coke, this can be proved preferably from the test-results of table 4.
Claims (2)
1. an application method for high rotten coking coal, is characterized in that: the method comprises the following steps:
1) determine that each single coking coal coal participating in coal blending is high rotten coking coal, collaborative coal, medium metamorphic grade coking coal, high rotten 1/3 coking coal, rich coal and lean coal, the described height coking coal that goes bad is
between 1.35% ~ 1.55%, 60%>=coarse grain inlays component and incomplete fibrous tissue sum>=47%, the 20%>=coking coal of fiber and lamellar structure sum>=12% completely, and described collaborative coal is
between 0.60% ~ 0.85%, the same sex and particulate inlay bottle coal or 1/3 coking coal of component sum>=55%, and described medium metamorphic grade coking coal is the average maximum reflectivity of vitrinite
be 1.15% ~ 1.35%, coarse grain inlays the coking coal of component concentration>=40%, and rotten 1/3 coking coal of described height is the average maximum reflectivity of vitrinite
be 0.85% ~ 1.15%, granular 1/3 coking coal inlaying component concentration sum>=60%;
2) determine that the weight percent of each single coking coal in mixed coal is: the amount of allocating into of high rotten coking coal is 20 ~ 55%; The amount of allocating into of collaborative coal is 10% ~ 40%; The medium metamorphic grade coking coal amount of allocating into is 0 ~ 20%, and the high rotten 1/3 coking coal amount of allocating into is 10% ~ 20%, and the rich coal amount of allocating into is 7% ~ 20%, and the lean coal amount of allocating into is 0% ~ 15%.
2. height according to claim 1 goes bad the application method of coking coal, it is characterized in that:
Described step 1) in the coarse grain of high rotten coking coal inlays that component is 47% ~ 50% with incomplete fibrous tissue component sum, complete fiber and lamellar structure sum be 12% ~ 17%, it is 60% ~ 70% that the same sex of described collaborative coal and particulate inlay component sum; The weight percent of each single coking coal in mixed coal is: the amount of allocating into of high rotten coking coal is 20% ~ 40%; The amount of allocating into of collaborative coal is 10% ~ 30%; The medium metamorphic grade coking coal amount of allocating into is 10% ~ 20%, and the high rotten 1/3 coking coal amount of allocating into is 15% ~ 20%, and the rich coal amount of allocating into is 10% ~ 15%, and the lean coal amount of allocating into is 5% ~ 10%.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105062532A (en) * | 2015-09-02 | 2015-11-18 | 武汉钢铁(集团)公司 | Coal blending method for controlling coke quality |
| CN110564439A (en) * | 2019-08-30 | 2019-12-13 | 武汉钢铁有限公司 | Coal blending and coking method for coking coal with coarse grain mosaic structure content of more than or equal to 70 percent |
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2015
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| WO2009030064A1 (en) * | 2007-09-03 | 2009-03-12 | Shutong Dong | A process for non-coke smelting iron and steel |
| CN102604658A (en) * | 2012-04-18 | 2012-07-25 | 武汉钢铁(集团)公司 | Coking coal blending method using weakly-caking coking coal |
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| CN105062532A (en) * | 2015-09-02 | 2015-11-18 | 武汉钢铁(集团)公司 | Coal blending method for controlling coke quality |
| CN110564439A (en) * | 2019-08-30 | 2019-12-13 | 武汉钢铁有限公司 | Coal blending and coking method for coking coal with coarse grain mosaic structure content of more than or equal to 70 percent |
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Application publication date: 20150701 |