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Coke making coal blending method with black-jack participated

A coking coal and lean coal technology, applied in coking ovens, petroleum industry, etc., can solve the problems of less cracks, poor coking performance, and low volatile content

Inactive Publication Date: 2008-10-29
WUHAN IRON & STEEL (GROUP) CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, lean coal belongs to bituminous coal with a high degree of metamorphism. In the national coal classification standard, lean coal is dry and ash-free based on volatile V daf >10-20%, cohesion index G >20-65, maximum thickness of colloidal layer y≤10mm; due to low volatile content of lean coal, low cohesion index and poor coking property, the resulting coke has large lumps and few cracks , poor wear resistance, the current traditional coal blending coking process conditions are generally about 10%, the specific blending ratio depends on the experience of each enterprise, there is no technical basis for quantitative blending, it is difficult to achieve a reasonable and effective use of lean coal resources

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The coking coal used in this embodiment 1 is domestic coal, and the raw coal property analysis is as follows:

[0032] Single coal sample Ash % Volatile % Sulfur % G Y R max R max <1.35% ratio

[0033] Gas fertilizer coal 8.19 42.34 1.70 97 27 0.65 100

[0034] 1 / 3 coking coal 9.23 33.93 0.65 77 14.5 0.85 100

[0035] Coking coal 10.29 24.68 0.45 87 17 1.28 74

[0036] Lean coal 10.89 16.48 0.40 48 6 1.45 48

[0037] For lean coal that participates in coal blending, its vitrinite reflectance R max <1.35% specific interval ratio is 48%, lean coal is the first sub-category lean coal.

[0038] The coal blending scheme of the present embodiment 1 is: gas fat coal: 8%; 1 / 3 coking coal: 38%; coking coal: 37%; lean coal: 17%.

[0039] Coke the obtained coal blend in a 6-meter coke oven, and the quality of the obtained coke is: crushing strength M40: 82.1%; wear resistance M10: 6.72%; reactivity (CRI): 27.9%, post-reaction strength (CSR): 65.8% . qualified.

Embodiment 2

[0041] The coking coal used in this embodiment 2 is domestic coal, and the raw coal property analysis is as follows:

[0042] Single coal sample Ash % Volatile % Sulfur % G Y R max R max <1.35-1.70% ratio

[0043] Gas fertilizer coal 8.24 43.12 1.68 95 26 0.63 0

[0044] 1 / 3 coking coal 9.52 34.26 0.61 74 13.5 0.89 0

[0045] Fatty coal 9.54 32.86 0.98 89 27 0.98 0

[0046] Coking coal 10.12 23.88 0.47 79 16.5 1.18 12

[0047] Lean coal 9.98 16.64 0.43 38 6 1.62 76

[0048] For lean coal that participates in coal blending, its vitrinite reflectance R max The specific interval ratio of 1.35-1.70% is 76%, lean coal is the second sub-category lean coal.

[0049] The coal blending scheme of Example 2 is: gas fat coal: 5%; 1 / 3 coking coal: 39%; fat coal: 5%; coking coal: 36%; lean coal: 15%.

[0050] Coke the obtained coal blend in a 4.63-meter coke oven, and the quality of the obtained coke is: crushing strength M 40 : 80.21%, abrasion resistance M 10 : 6.88%, reacti...

Embodiment 3

[0052] The coking coal used in this embodiment 3 is domestic coal, and the raw coal property analysis is as follows:

[0053] Single coal sample Ash % Volatile % Sulfur % G Y R max R max >1.70% ratio

[0054] Gas coal 8.24 38.12 0.56 56 10 0.63 0

[0055] 1 / 3 coking coal 9.52 34.26 0.61 74 13.5 0.89 0

[0056] Fatty coal 9.54 32.86 0.98 89 27 0.98 0

[0057]Coking coal 10.12 23.88 0.47 79 16.5 1.18 0

[0058] Lean coal 9.98 16.64 0.43 38 6 1.62 76

[0059] For lean coal that participates in coal blending, its vitrinite reflectance R max The proportion of specific interval >1.70% is 76%, and the lean coal is the third sub-category lean coal.

[0060] The coal blending scheme of Example 3 is: gas coal: 5%; 1 / 3 coking coal: 38%; fat coal: 8%; coking coal: 39%; lean coal: 10%.

[0061] Coke the obtained coal blend in a 4.63-meter coke oven, and the quality of the obtained coke is: crushing strength M 40 : 80.98%, abrasion resistance M 10 : 6.72%, reactivity (CRI): 29...

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Abstract

The invention relates to a coking coal blending method with the participation of lean coal, which comprises the step of blending various single coking coals. The singe coal coals include lean coal, wherein the special interval proportion of the lean coal with a vitrinite reflectance Rmax less than 1.35% is larger than 45%, and the lean coal is 16 to 20% the total weight of the coking coals; or the special interval proportion of the lean coal with a vitrinite reflectance Rmax within 1.35 to 1.70% is larger than 65%, and the lean coal is 13 to 15% the total weight of the coking coals; or the special interval proportion of the lean coal with a vitrinite reflectance Rmax larger than 1.70% is larger than 70%, and the lean coal is 8 to 12% the total weight of the coking coals. The method can achieve quantitatively and maximally reasonable usage of lean coal in national standard classification on the premise of coke quality stabilization, thus reducing the coal blending cost.

Description

technical field [0001] The invention relates to the technical field of coking coal blending, in particular to a coking coal blending method, in particular to a method in which lean coal participates in coking coal blending. Background technique [0002] my country is rich in coal resources, but coking coal resources are in short supply, and the limited coking coal resources are not evenly distributed. Gas coal and 1 / 3 coking coal account for more than 46% of the total coking coal, coking coal accounts for 17.57% of coking coal reserves, fat coal accounts for 10%, and lean coal accounts for about 16%. [0003] At present, in the method where lean coal participates in coking coal blending, coking coal generally accounts for 35%-55% of the total coal blending weight, and lean coal generally accounts for about 10% of the total coal blending weight. The coking coal content requirements of the coal are highly mismatched. Therefore, how to effectively utilize limited resources an...

Claims

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Application Information

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IPC IPC(8): C10B57/04
Inventor 薛改凤傅连春陈鹏项茹魏松波谢传斌张前香刘尚超宋子逵张雪红
Owner WUHAN IRON & STEEL (GROUP) CORP
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