Coking mixed coal prepared via adding of reclaimed material, and coking coal blending method

Abstract

The invention discloses a coking mixed coal prepared via adding of a reclaimed material, and a coking coal blending method. The coking mixed coal is composed of, by weight, (16-2N)% of fat coal, 19 to 21% of high-sulphur coal, 4 to 6% of 1 / 3 coking coal, 39 to 41% of coking coal, (7-N)% of meager lean coal, (12+2N)% of gas coal, and N% of the reclaimed material, wherein N<=5; the reclaimed material contains 21 to 24wt% of beta resin. According to the coking coal blending method, beta resin with adhesive effect is used for realizing combination of the coking mixed coal with coking coal blending technology, and is used for replacing a part of fat coal into coking coal to produce coke, so that coking coal source is widened, the using amount of expensive fat coal is reduced, and coal blending cost is reduced. The coking coal blending method is capable of widening the plastic temperature range of coking coal, realizing better connection of different kinds of coal, increasing cokeability in coking process, promoting anisotropic generation, ensuring that coke quality is capable of satisfying coke requirements of large blast furnaces, and at the same time increasing the using amount of low adhesive performance meager lean coal in coking coal blending, and reducing coal blending cost greatly.

Description

Technical field [0001] The invention belongs to the technical field of coking process methods, in particular to a coking coal blending 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, coal pretreatment technologies have been extensively researched and developed, including: coal humidity control technology, coal preheating technology, tamping coking technology, coal blending technology, and Add 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 entering the furnace, reduce energy consumption, and expand the amount of weakly caking coal. However, there are problems such as transportation difficulties and smoke and dust emission during furnace loading. Tamping coking increases the bulk density of coal entering...

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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