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Method for preparing formed coke

A technology of coal tar and cold press forming, which is applied in the field of coal chemical engineering, can solve the problems of coking cost increase and coking coal resource shortage, etc., and achieve the effects of reducing consumption, improving coke strength and saving production cost

Inactive Publication Date: 2016-03-23
XIAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main coking coal resources used for coking are in short supply, and the price rises again and again, which greatly increases the cost of coking

Method used

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  • Method for preparing formed coke
  • Method for preparing formed coke
  • Method for preparing formed coke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The preparation method of present embodiment form coke comprises the following steps:

[0022] Step 1, using deionized water as a solvent, respectively preparing a sodium silicate aqueous solution with a concentration of 2.0mol / L and a sodium bentonite aqueous solution with a concentration of 260g / L;

[0023] Step 2: Grinding Huangling coal into coal powder, adding coal tar, sodium silicate aqueous solution and sodium bentonite aqueous solution described in step 1 to the coal powder, mixing evenly, filling in the steel mold, and then using a hydraulic press Cold-press forming, the pressure of cold-press forming is 30MPa, obtains blank after demoulding, and the shape of described blank is cylindrical, and cross-sectional diameter is 50mm, and height is 45mm; The addition of described coal tar is 23% of the quality of pulverized coal. %, the addition of the sodium silicate aqueous solution is 3.75% of the pulverized coal quality, and the addition of the sodium bentonite a...

Embodiment 2

[0027] The preparation method of present embodiment form coke comprises the following steps:

[0028] Step 1, using deionized water as a solvent, respectively preparing a sodium silicate aqueous solution with a concentration of 2.5mol / L and a sodium bentonite aqueous solution with a concentration of 280g / L;

[0029] Step 2: Grind Shenfu coal into coal powder, add coal tar, sodium silicate aqueous solution and sodium bentonite aqueous solution described in step 1 to the coal powder, mix evenly, fill in the steel mold, and then use a hydraulic press to Cold-press forming, the pressure of cold-press forming is 30MPa, obtains blank after demoulding, and the shape of described blank is cylindrical, and cross-sectional diameter is 50mm, and height is 45mm; The addition of described coal tar is 22% of the quality of pulverized coal. %, the addition of the sodium silicate aqueous solution is 2.5% of the pulverized coal quality, and the addition of the sodium bentonite aqueous solution...

Embodiment 3

[0033] The preparation method of present embodiment form coke comprises the following steps:

[0034] Step 1, using deionized water as a solvent, respectively preparing a sodium silicate aqueous solution with a concentration of 3.0mol / L and a sodium bentonite aqueous solution with a concentration of 250g / L;

[0035] Step 2: Grind Datong coal into coal powder, add coal tar, sodium silicate aqueous solution and sodium bentonite aqueous solution described in step 1 to the coal powder, mix evenly, fill in the steel mold, and then use a hydraulic press to cool Compression forming, the pressure of cold forming is 30MPa, and the blank is obtained after demoulding, the shape of the blank is cylindrical, the cross-sectional diameter is 50mm, and the height is 45mm; the addition of the coal tar is 24% of the coal powder quality , the addition of the sodium silicate aqueous solution is 1.25% of the quality of coal powder, and the addition of the sodium-based bentonite aqueous solution is...

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Abstract

The invention provides a method for preparing formed coke. The method comprises the following steps: 1, preparing a sodium silicate aqueous solution and a sodium bentonite aqueous solution; 2, adding coal tar, the sodium silicate aqueous solution and the sodium bentonite aqueous solution into pulverized coal, uniformly mixing, filling a steel mold with the mixture, performing cold press molding by utilizing a hydraulic press, and demolding to obtain a blank material; and 3, drying the blank material in a drying oven, and naturally cooling to obtain the formed coke. The formed coke prepared by adopting the method is an organic-inorganic composite material, and novel formed coke with high cold strength can be produced by adopting the cold press molding method; and the type of coal mines can be selected without strict requirements, and formed coke with high tumbler strength can be prepared by utilizing lean coal, meager lean coal and other weak caking coal.

Description

technical field [0001] The invention belongs to the technical field of coal chemical engineering, and in particular relates to a method for preparing molded coke. Background technique [0002] my country is rich in coal resources, with estimated geological reserves exceeding 4.5 trillion tons. The foundry industry's demand for foundry coke is also growing, which will inevitably increase its dependence on high-quality coking coal. From a global perspective, there is a general feeling that there is a shortage of high-quality coking coal. From the perspective of my country's situation, in coking coal, gas coal reserves account for 54.7%, while the combined reserves of fat coal, coking coal and lean coal are less than half of the coking coal reserves, and the distribution is extremely uneven, making coking plants in some areas There are certain difficulties in refining high-quality foundry coke. In terms of the quality of coking coal, high sulfur (S t > 2%) coking coal acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/06
CPCC10B57/045C10B57/06
Inventor 杨建利高战辉杜安杨小刚
Owner XIAN UNIV OF SCI & TECH
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