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Top-charging coke blended coal

A technology of mixing coal and top-loading coke, which is applied in the field of metallurgy, can solve the problems of high cost, low lean coal content, and high fat coal content, and achieve the effect of reducing the dosage, increasing the dosage, and improving the quality of coke

Active Publication Date: 2020-12-01
SICHUAN DAZHOU IRON & STEEL GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to ensure the quality of blast furnace coke and the melting efficiency, the conventional coal blending structure has high content of fat coal, low content of lean coal, high content of high-priced low-sulfur main coke, and low content of low-priced high-sulfur main coke. Although this coal blending structure can guarantee the quality of blast furnace coke, the cost is very high

Method used

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  • Top-charging coke blended coal
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  • Top-charging coke blended coal

Examples

Experimental program
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Effect test

Embodiment 1

[0025] This embodiment provides a top-loaded coke blend coal, which is composed of the following components in terms of mass percentage:

[0026] High-sulfur No. 25 coking coal: 19%; low-sulfur No. 25 coking coal: 15%; No. 35 coal I: 16%; No. 35 coal II: 25%; No. 35 coal III: 10%; lean coal: 8%; fat coal : 7%. Among them, the requirements for each component are as follows:

[0027] (1) No. 35 coal:

[0028] The caking index G value of No. 35 coal I is 80%; the caking index G value of No. 35 coal II is 75%; the caking index G value of No. 35 coal III is 65%.

[0029] (2) High sulfur No. 25 coking coal:

[0030] High sulfur No. 25 coking coal, in terms of mass percentage, each component satisfies the following relationship: the content of low metamorphic coal is 0.4%, and the low metamorphic coal is lignite and long-flame coal with a mass ratio of 1:2 Mixed coal; the content of high metamorphic coal is 0.8%, and the high metamorphic coal is a mixed coal of anthracite, lean c...

Embodiment 2

[0042] This embodiment provides a top-loaded coke blend coal, which is composed of the following components in terms of mass percentage:

[0043] High-sulfur No. 25 coking coal: 19%; low-sulfur No. 25 coking coal: 15%; No. 35 coal I: 16%; No. 35 coal II: 25%; No. 35 coal III: 10%; lean coal: 8%; fat coal : 7%. Among them, the requirements for each component are as follows:

[0044] (1) No. 35 coal:

[0045] The caking index G value of No. 35 coal I is 75%; the caking index G value of No. 35 coal II is 70%; the caking index G value of No. 35 coal III is 68%.

[0046] (2) High sulfur No. 25 coking coal:

[0047] High-sulfur No. 25 coking coal, in terms of mass percentage, each component satisfies the following relationship: the low metamorphic degree coal content is 0.5%, and the low metamorphic degree coal is a mixed coal of lignite and long-flame coal in a mass ratio of 1:1; The content of high metamorphic coal is 0.8%, and the high metamorphic coal is a mixture of anthrac...

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Abstract

The invention discloses top-charging coke blended coal. The top-charging coke blended coal comprises the following components in percentage by mass: 19% of high-sulfur No. 25 coking coal, 15% of low-sulfur No. 25 coking coal, 16% of No. 35 coal I, 25% of No. 35 coal II, 10% of No. 35 coal III, 8% of lean coal, and 7% of fat coal, wherein the value of the caking index G of the No. 35 coal I is greater than or equal to 75%, the value of the caking index G of the No. 35 coal II is greater than or equal to 70%, and the value of the caking index G of the No. 35 coal III is greater than or equal to65%. According to the invention, by controlling the proportion of each component of top-charging coke and optimizing the composition of each component and corresponding parameter indexes, the blendingamounts of the high-price fat coal and low-sulfur coking coal are reduced and the blending amounts of the low-price lean coal and high-sulfur coking coal are increased while the good thermal intensity of the top-charging coke is guaranteed, so a coal blending structure is optimized, coal blending cost is effectively reduced, coke quality is stabilized, and good conditions are created for stable operation of a blast furnace.

Description

technical field [0001] The invention relates to the technical field of metallurgy, in particular to a top-loaded coke blended coal. Background technique [0002] As blast furnaces have higher and higher requirements for coke quality stability, higher requirements have been put forward for the stability of incoming coal quality. How to make full use of coal rock analysis to control incoming coal quality, optimize coal blending structure, and reduce coal blending costs has become an important issue. A major research topic facing the coking industry. [0003] In order to ensure the quality of blast furnace coke and ensure the melting efficiency, the conventional coal blending structure has high content of fat coal, low content of lean coal, high content of high-priced low-sulfur main coke, and low content of low-priced high-sulfur main coke. Although this coal blending structure can guarantee the quality of blast furnace coke, the cost is very high. Contents of the invention...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04
CPCC10B53/04
Inventor 龙素安李元廷杜国权吴映忠熊江君何德军
Owner SICHUAN DAZHOU IRON & STEEL GROUP
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