Coking composite leaning agent and preparation method thereof

A technology of coal coking and thinning agent, which is applied in the field of coal chemical industry, can solve the problems of unfavorable coke mechanical strength, reduction of coke sulfur content, and large particle size of thinning agent powder, so as to improve coke mechanical strength, reduce coke sulfur content, The effect of the simple and easy preparation method

Active Publication Date: 2011-01-26
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In summary, the main problems existing in the existing coal coking thinning agents are: the thinning agent does not comprehensively consider reducing coke sulfur content, improving coke mechanical strength, and increasing CO and CO in gas. 2 content and other effects, the powder particle size of the thinner is large, which is not conducive to improving the mechanical strength of coke

Method used

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  • Coking composite leaning agent and preparation method thereof
  • Coking composite leaning agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The magnesite ore (MgCO 3 content > 97%), anthracite from Jincheng Coal Mine in Shanxi (total sulfur S t，ad 0.51%, organic sulfur S org，ad 0.24%), coke powder (sulfur S t，ad 0.71%, organic sulfur S org，ad0.37%) and coal tar pitch (112° C. of softening point) as raw materials; the selected four kinds of raw materials are respectively crushed to a particle size of 25mm after 500 revolutions measured by a small drum 25 Characterization, abrasion resistance is measured by the mass percentage M of coke with particle size 10 Characterization; Determination of organic sulfur content S org，ad ; CO in the gas sample 2 and CO content were measured with an Austenitic gas analyzer. Experimentally measured, when no thinning agent is added, the organic sulfur content of coke S org，ad 0.29%, crushing strength M 25 90.3%, abrasion resistance M 10 6.9%, CO in gas 2 and CO content are 2.1% and 7.3% respectively; when adding 10% compound thinning agent, the organic sulfur conten...

Embodiment 2

[0028] The difference from Example 1 is that the proportioning of the four raw materials for preparing the composite thinner is: 82% magnesite ore, 5% anthracite, 10% coke powder, 3% coal tar pitch; magnesite When the ore, anthracite, and coke powder are mixed and ball milled, the hydrogen atmosphere pressure is 0.2MPa, the ball milling time is 1 hour, and the ball milling time is 1.5 hours after adding coal tar pitch; the dosage of the obtained composite thinner in coking coal is 5%; According to the coking test, the organic sulfur content of coke S org，ad 0.24%, crushing strength M 25 91.2%, abrasion resistance M 10 6.5%, CO in gas 2 and CO content were 3.8% and 8.6%, respectively.

Embodiment 3

[0030] The difference from Example 1 is that the proportioning of the four raw materials for preparing the composite thinner is: 45% magnesite ore, 15% anthracite, 30% coke powder, 10% coal tar pitch; magnesite When the ore, anthracite, and coke powder are mixed and ball milled, the hydrogen atmosphere pressure is 0.5 MPa, the ball milling time is 3 hours, and the ball milling time is 0.5 hour after adding coal tar pitch; the dosage of the obtained composite thinner in coking coal is 7%; According to the coking test, the organic sulfur content of coke S org，ad 0.25%, crushing strength M 25 93.1%, abrasion resistance M 10 6.0%, CO in gas 2 and CO content were 3.1% and 8.2%, respectively.

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Abstract

The invention discloses a coking composite leaning agent and a preparation method thereof. The coking composite leaning agent comprises the following raw materials in percentage by mass: 5 to 15 percent of anthracite, 10 to 30 percent of coke powder, 3 to 10 percent of coal tar pitch and the balance of magnesite. The preparation method of the coking composite leaning agent mainly comprises the following steps of: mixing the magnesite, the anthracite and the coke powder in the atmosphere of hydrogen, performing ball milling on the mixture, adding the coal tar pitch into the mixture, and then performing ball milling on the mixture. The coking composite leaning agent of the invention has the advantages of reducing coke sulphur content, improving the mechanical strength of cokes and increasing CO content and CO2 content of the gas, along with low cost of the raw materials, simple preparation method and the like.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a coal coking composite thinning agent and a preparation method of the coal coking composite thinning agent. Background technique [0002] The coke produced by the coal coking process can be used in blast furnace ironmaking, and the by-product coke oven gas can be used to synthesize methanol. As far as coke is concerned, reducing its sulfur content and improving its mechanical strength are beneficial to blast furnace ironmaking. For coke oven gas, increase its CO and CO 2 content is beneficial to the synthesis of methanol. [0003] When coke is used in blast furnace ironmaking, sulfur content is an important index. High sulfur content will cause the produced pig iron to have high sulfur content and poor quality, or the operation index of blast furnace will decrease due to the need to increase the alkalinity of slag. Generally, for every 0.1% increase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/06
Inventor 周仕学张鸣林韩梅金俊杰朱本启黄长胜牛海丽杨敏建张光伟陈海鹏张同环李桂江崔立强吕英海吕德良孔祥荣王盼盼王乃飞陆帅帅
Owner SHANDONG UNIV OF SCI & TECH
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