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
CN112011353AActive Publication Date: 2020-12-01SICHUAN DAZHOU IRON & STEEL GROUP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN DAZHOU IRON & STEEL GROUP
Publication Date
2020-12-01

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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.
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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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