Coking coal blended with recycled materials and coking coal blending method

Abstract

The invention discloses a coking blending coal blended with recycled materials and a coking coal blending method. The weight ratio of the components is: fat coal (16-2N)%, high-sulfur coal 19-21%, 1 / 3 coking coal 4~6%, coking coal 39~41%, lean coal (7-N)%, gas coal (12+2N)%, recycled material N%, said N≤5; the content of β resin in said recycled material is 21~24wt%. This blended coal uses β resin with caking effect and combines it with coking coal blending technology to replace part of fat coal and add it to coking coal to produce coke, which can not only expand coking coal resources, but also reduce high-priced fat coal blending. Ratio, reduce coal blending cost. This coal blending method widens the plastic temperature range of coking coal, so that various coal types can better connect and overlap each other, improve the coking performance of the coking process, and promote the anisotropy generation technology; in ensuring the quality of coke to meet the requirements of large-scale Under the condition of blast furnace coke demand, the proportion of lean and weak coal with weak cohesion can be maximized in coking coal blending, so as to greatly reduce the cost of coal blending.

Description

technical field [0001] The invention belongs to the technical field of coking process methods, in particular to a coking blended coal blended with recycled materials and a coking coal blending method. Background technique [0002] At present, in order to reduce the cost of coal blending and increase the proportion of weakly caking coal, extensive research and development of coal pretreatment technology, including: coal humidity control technology, coal preheating technology, tamping coking technology, coal blending technology and With the addition of additives, etc. However, these processes also have various limitations. Coal preheating and coal humidity control increase the bulk density by controlling the moisture of the coal into the furnace, reduce energy consumption, and expand the amount of weakly caking coal, but there are problems such as transportation difficulties and smoke and dust escaping during furnace loading. Stamping coking increases the bulk density of coa...

AI Technical Summary

Problems solved by technology

However, these processes also have various limitations

Coal preheating and coal humidity control increase the bulk density, reduce energy consumption, and expand the amount of weakly cohesive coal by controlling the moisture content of the coal entering the furnace. However, there are problems such as transportation difficulties and smoke emission during furnace loading.

Stamping coking increases the bulk density of coal into the furnace, which can save high-quality coking coal and reduce costs, but there are problems such as affecting the life of the furnace body, difficulty in pushing coke, and dust emission during furnace loading.

Coal blending can increase the bulk density of coal materials, and the addition of binders improves the bonding ability between coal materials; however, it is necessary to look for binders with low prices and good effects, and the full contact between coal materials and binders and The cooling and transportation of the ball will affect the effect of coal blending

The various shortcomings of the above-mentioned processes are not conducive to the substantial improvement of the technical level of my country's coking industry, and cannot be fully applied to coking plants

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