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Coking coal blending method with participation of lean coking coal

A technology for lean coking coal and coking coal is applied in the field of coking coal blending with lean coking coal. Cost coal blending, easy to achieve, good quality effect

Active Publication Date: 2016-06-01
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If lean coking coal is directly blended into coking coal blending, it is possible to achieve continuous vitrinite reflectance of the blended coal, but it cannot be guaranteed to be in a normal distribution; at the same time, the ash content in the coke made may exceed the standard, which will lead to poor quality of the coke. Poor, unable to meet the quality requirements of large-scale blast furnace coke

Method used

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  • Coking coal blending method with participation of lean coking coal
  • Coking coal blending method with participation of lean coking coal
  • Coking coal blending method with participation of lean coking coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Coking coal components and weight percentages are:

[0025] 1 / 3 coking coal: 16%;

[0026] Dry ash-free base volatile content 32%≤V daf ≤34% fat coal: 10%;

[0027] Dry ash-free base volatile content 28%≤V daf <32% fat coal: 10%;

[0028] Caking index G≥78 coking coal: 34%;

[0029] Caking index 75≤G<78 Coking coal: 10%;

[0030] Lean coking coal: 20%.

[0031] Lean coking coal quality index: ash content: 9.1%, volatile matter: 19.64%, G value: 72, Y value: 6.5mm.

[0032] Coal quality index of coking coal: ash content A d : 8.34%, Sulfur S td : 0.63%, Ash V daf : 26.38%.

[0033] The distribution results of vitrinite reflectance of coking coal are shown in Table 1.

[0034] Table 1 Example 1 coking coal vitrinite reflectance distribution results (%)

[0035]

[0036] The quality of coke obtained in a coke oven above 6 meters: coke crushing strength M 40 : 89.38%; coke strength CSR after reaction: 63.60%; ash A d : 11.61%; Sulfur S td : 0.60%.

Embodiment 2

[0038] Coking coal composition and weight percentage:

[0039] 1 / 3 coking coal: 10%;

[0040] Dry ash-free base volatile content 32%≤V daf ≤34% fat coal: 16%;

[0041] Dry ash-free base volatile content 28%≤V daf <32% fat coal: 8%;

[0042] Caking index G≥78 coking coal 1 # : 30%;

[0043] Caking index G≥78 coking coal 2 # : 12%;

[0044] Caking index 75≤G<78 Coking coal: 0%;

[0045] Lean coking coal: 24%.

[0046] Lean coking coal quality index: ash content: 9.2%, volatile matter: 19.18%, G value: 64.3, Y value: 9.3mm.

[0047] Coking coal quality index: ash A d : 9.30%, Sulfur S td : 0.90%, gray hair content V daf : 26.51%.

[0048] The distribution results of vitrinite reflectance of coking coal are shown in Table 2.

[0049] Table 2 Example 2 coking coal vitrinite reflectance distribution results (%)

[0050]

[0051] The quality of coke obtained in a coke oven above 6 meters: coke crushing strength M 40 : 89.47%; coke strength CSR after reaction: 65.18...

Embodiment 3

[0053] Coking coal composition and weight percentage:

[0054] 1 / 3 coking coal: 8%;

[0055] Dry ash-free base volatile content 32%≤V daf ≤34% fat coal: 16%;

[0056] Dry ash-free base volatile content 28%≤V daf <32% fat coal: 8%;

[0057] Caking index G≥78 coking coal 1 # : 34%;

[0058] Caking index G≥78 coking coal 2 # : 12%;

[0059] Caking index 75≤G<78 Coking coal: 0%;

[0060] Lean coking coal: 22%.

[0061] Lean coking coal quality index: ash content: 11.29%, volatile matter: 18.70%, G value: 74, Y value: 7.5mm.

[0062] Coal quality index of mixed coal: ash content A d : 9.29%; Sulfur S td : 0.90%; gray hair component V daf : 26.34%.

[0063] The distribution results of vitrinite reflectance of coking coal are shown in Table 3.

[0064] Table 3 Example 3 coking coal vitrinite reflectance distribution results (%)

[0065]

[0066]The quality of coke obtained in a coke oven above 6 meters: coke crushing strength M 40 : 87.30%; coke strength CSR after ...

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Abstract

The invention provides a coking coal blending method with the participation of lean coking coal. Components of coking coal of the lean coking coal comprises, in percentage by weight, 8%-18% of 1 / 3 coking coal, 10%-18% of fat coal with a dry ash-free basis volatile component (Vdaf) larger than or equal to 32% and smaller than or equal to 34%, 8%-14% of fat coal with a dry ash-free basis Vdaf larger than or equal to 28% and smaller than 32%, 30%-50% of coking coal with the caking index G larger than or equal to 78, 0%-25% of coking coal with the caking index G larger than or equal to 75 and smaller than 78 and 10%-30% of lean coking coal. The ash content of the coking coal is 8%-9.5%, the sulfur content is 0.6%-0.9%, the volatile content is 25%-27%, and the vitrinite reflectance is distributed continuously and normally. The blended proportion of the lean coking coal with the method reaches 30%, and the vitrinite reflectance of the coking coal is distributed continuously and normally, so that while high-quality coking coal is protected, low-cost coal blending is achieved for enterprises; the produced coking coal ash content is below 12.5%, and the sulfur content is below 1.0%, therefore, the requirement for coking coal consumption of large blast furnaces can be completely met.

Description

technical field [0001] The invention belongs to the technical field of metallurgical coke production, in particular to a method for blending coking coal with lean coking coal. Background technique [0002] In China's coal classification, bituminous coal is divided into different coal grades from low to high according to different degrees of metamorphism, mainly including gas coal, 1 / 3 coking coal, fat coal, coking coal, lean coal, etc. In production practice, when repeatedly measuring the degree of deterioration of the same coal type, it is often encountered that the measurement results belong to different adjacent coal grades. Coal grades are artificially divided, and coal ranks are gradually transitioned. The same coal type may be composed of two or more coal grades. Therefore, the coal rank distribution of the measured coal cannot be clearly displayed in the conventional measurement results. [0003] The vitrinite reflectance can clearly see the coal rank distribution o...

Claims

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Application Information

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IPC IPC(8): C10B57/04
Inventor 庞克亮唐复平王明国赵恒波马银华刘冬杰栗红王超
Owner ANGANG STEEL CO LTD
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