Pellet binder prepared from residues in direct coal liquefaction process and preparation method thereof

A technology for direct coal liquefaction and binder, applied in the field of circular economy, can solve the problems of high cost and unacceptable steel enterprises, and achieve the effect of reducing the amount of consumption, facilitating promotion and good binding effect.

Inactive Publication Date: 2011-11-09
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The introduction of silica by bentonite binder is a harmful impurity in the blast furnace ironmaking process. The use of organic polymer materials instead of bentonite has been the main content of research in this field. However, all polymer materials have the problem of high cost, which is not easy for iron and steel enterprises to accept.

Method used

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  • Pellet binder prepared from residues in direct coal liquefaction process and preparation method thereof
  • Pellet binder prepared from residues in direct coal liquefaction process and preparation method thereof
  • Pellet binder prepared from residues in direct coal liquefaction process and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 770 grams of coal liquefaction residue, 200 grams of sodium bentonite, 10 grams of soda ash (sodium carbonate), 20 grams of naphthalene-based dispersant, 300 grams of water, 4 hours after ball milling, the obtained slurry passed through a 300-mesh sieve and became a stable liquid pellet Binder QTN-1.

[0036]

[0037] 850 grams of coal liquefaction residue, 122 grams of sodium bentonite, 8 grams of soda ash (sodium carbonate), 20 grams of naphthalene-based dispersant, 300 grams of water, 4 hours after ball milling, the obtained slurry passed through a 300-mesh sieve and became a stable liquid pellet Binder QTN-2.

[0038]

[0039] 900 grams of coal liquefaction residue, 75 grams of sodium bentonite, 6 grams of soda ash (sodium carbonate), 19 grams of naphthalene-based dispersant, 300 grams of water, 4 hours after ball milling, the obtained slurry passed through a 300-mesh sieve and became a stable liquid pellet Binder QTN-3.

[0040]

[0041] Add the dry powder pel...

Embodiment 2

[0045] 800 grams of coal liquefaction residue, 170 grams of calcium-based bentonite, 15 grams of soda ash (sodium carbonate), 15 grams of naphthalene-based dispersant, 300 grams of water, after 4 hours of ball milling, the obtained slurry passed through a 300-mesh sieve and became a stable liquid pellet Binder QTN-4.

[0046]

[0047] 850 grams of coal liquefaction residue, 115 grams of calcium-based bentonite, 15 grams of soda ash (sodium carbonate), 20 grams of naphthalene-based dispersant, 300 grams of water, after 4 hours of ball milling, the obtained slurry passed through a 300-mesh sieve and became a stable liquid pellet Binder QTN-5.

[0048]

[0049] 900 grams of coal liquefaction residue, 50 grams of calcium-based bentonite, 30 grams of soda ash (sodium carbonate), 20 grams of naphthalene-based dispersant, 300 grams of water, after 4 hours of ball milling, the obtained slurry passed through a 300-mesh sieve and became a stable liquid pellet Binder QTN-6.

[0050] ...

Embodiment 3

[0055] 800 grams of coal liquefaction residue, 160 grams of calcium-based bentonite, 20 grams of soda ash (sodium carbonate), 10 grams of naphthalene-based dispersant, 300 grams of water, 4 hours after ball milling, the obtained slurry passed through a 300-mesh sieve, 150 o Dried at C, crushed into a powder of less than 200 mesh, which is the powder pellet binder QTN-7.

[0056]

[0057] 850 grams of coal liquefaction residue, 100 grams of calcium-based bentonite, 30 grams of soda ash (sodium carbonate), 20 grams of naphthalene-based dispersant, 300 grams of water, 4 hours after ball milling, the obtained slurry passed through a 300-mesh sieve, and dried at 150oC. Crushed into a powder less than 200 mesh, it is the powder pellet binder QTN-8.

[0058]

[0059] 900 grams of coal liquefaction residue, 50 grams of calcium-based bentonite, 30 grams of soda ash (sodium carbonate), 20 grams of naphthalene-based dispersant, 300 grams of water, 4 hours after ball milling, the obtain...

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Abstract

The invention discloses a pellet binder prepared from residues in the direct coal liquefaction process and a preparation method thereof. The preparation method comprises the following steps of: blending the residues in the direct coal liquefaction process, bentonite, a dispersant, sodium carbonate and water in a certain proportion, and performing wet ball-milling pulping to obtain a stable liquidpellet binder; and drying the liquid pellet binder, and crushing to obtain a powdery pellet binder. The binder has low cost, the content of silicon oxide introduced into a product is low, more ferricoxide and organic matters are introduced, the grade of an iron ore raw material is improved, coke consumption is lowered, the preparation method is an effective way to fully use the residues in the direct coal liquefaction process, waste materials are changed into valuable materials, and energy conservation, emission reduction and good economic and social benefits are realized.

Description

technical field [0001] The invention belongs to the technical field of circular economy in which coal chemical industry waste residue is applied in the metallurgical industry, and in particular relates to a pellet binder for preparing pellet sintering ore in the iron and steel industry by using coal direct liquefaction residue. Background technique [0002] As we all know, in the coal-to-liquids technology, the direct coal liquefaction technology has begun large-scale industrial application in my country, but the treatment of the residue produced in the process of direct coal liquefaction has not been well resolved. [0003] The coal direct liquefaction residue contains three types of substances: a certain amount of organic matter and unreacted carbon, a certain amount of inorganic ash and a certain amount of inorganic catalyst. If any one or two types of substances in the residue are used alone, there will be a technical problem of separating and removing the remaining subs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B1/242
CPCY02P10/20
Inventor 赵鹏张传江周旭东代戈
Owner CHANGAN UNIV
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