A sulfuric acid slag composite explosion suppression material for suppressing coal dust explosion and its preparation method and application

A technology of sulfuric acid slag and sulfuric acid slag powder, which is applied in dust prevention, mining equipment, earth square drilling and mining, etc. It can solve problems such as poor spheroidization, high water absorption rate, and impact on sintering productivity, so as to expand utilization channels and realize resource utilization , Excellent explosion suppression effect

Inactive Publication Date: 2021-07-02
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its poor spheroidization and high water absorption affect the sintering productivity

Method used

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  • A sulfuric acid slag composite explosion suppression material for suppressing coal dust explosion and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of preparation of the sulfuric acid slag composite anti-explosion material of suppressing coal dust explosion, comprises the following steps:

[0043] (1) After stirring 40 parts by weight of sulfuric acid slag powder, 5 parts by weight of coal powder, 3 parts by weight of gypsum, 10 parts by weight of calcium oxide and 2 parts by weight of water, the briquetting is dried, calcined at 1000 ° C for 3 hours, cooled After grinding to 100 mesh, active powder is obtained.

[0044] (2) 40 parts by weight of active powder soaked in 180 parts by weight of calcium hydroxide solution, 1 part by weight of aluminate coupling agent, 28 parts by weight of sodium hexametaphosphate and 1 part by weight of ammonium persulfate as 180 parts by weight of calcium hydroxide solution with a mass concentration of 5%. In the oxidizing agent, after stirring at 50°C for 6 hours, separate the obtained upper layer flocculent turbid liquid and the lower layer residue after completion, and set...

Embodiment 2

[0049] A kind of preparation of the sulfuric acid slag composite anti-explosion material of suppressing coal dust explosion, comprises the following steps:

[0050] (1) After stirring 60 parts by weight of sulfuric acid slag powder, 8 parts by weight of coal powder, 6 parts by weight of gypsum, 14 parts by weight of calcium oxide and 4 parts by weight of water, the briquetting is dried, calcined at 1080 ° C for 2 hours, cooled After grinding to 300 mesh, active powder is obtained.

[0051] (2) Soak 60 parts by weight of active powder in 230 parts by weight of calcium hydroxide solution, 3 parts by weight of aluminate coupling agent, 15 parts by weight of sodium hexametaphosphate and 3 parts by weight of ammonium persulfate as 230 parts by weight of calcium hydroxide solution with a mass concentration of 6%. In the oxidizing agent, after stirring at 50°C for 5 hours, after completion, separate the obtained upper layer flocculent liquid and the lower layer residue, and set aside...

Embodiment 3

[0056] A kind of preparation of the sulfuric acid slag composite anti-explosion material of suppressing coal dust explosion, comprises the following steps:

[0057] (1) After stirring 70 parts by weight of sulfuric acid slag powder, 10 parts by weight of coal powder, 10 parts by weight of gypsum, 20 parts by weight of calcium oxide and 5 parts by weight of water, the briquetting is dried, calcined at 1100 ° C for 2 hours, and cooled After grinding to 80 mesh, active powder is obtained.

[0058] (2) 50 parts by weight of active powder soaked in 200 parts by weight of calcium hydroxide solution, 2 parts by weight of aluminate coupling agent, 20 parts by weight of sodium hexametaphosphate and 2.1 parts by weight of sodium persulfate as 200 parts by weight of calcium hydroxide solution with a mass concentration of 9%. In the oxidizing agent, after stirring at 60°C for 4 hours, separate the obtained upper flocculent turbid liquid from the lower residue and set aside for later use; ...

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Abstract

The invention belongs to the technical field of explosion suppression materials, and in particular relates to a sulfuric acid slag composite explosion suppression material for suppressing coal dust explosion, a preparation method and application thereof. The method is as follows: 1) uniformly mixing sulfuric acid slag powder, coal powder, gypsum, calcium oxide and water, drying the obtained slurry, and then calcining, and pulverizing the calcined product after completion to obtain active powder; 2) mixing The active powder obtained in step 1) is placed in the mixed solution formed by calcium hydroxide solution, aluminate coupling agent, sodium hexametaphosphate and persulfate and heated and soaked. Separation; 3) washing the flocculent turbid liquid; then drying and grinding to obtain ultrafine powder; 4) carbonizing the residue after steaming; after completion, mixing the carbonized product with the ultrafine powder obtained in step 3) , that is. The invention uses sulfuric acid slag as the basic raw material, not only realizes the resource utilization of the sulfuric acid slag, but also the prepared anti-explosion material can cooperate with the anti-explosion in stages, and has excellent anti-explosion effect.

Description

technical field [0001] The invention belongs to the technical field of explosion suppression materials, and in particular relates to a sulfuric acid slag composite explosion suppression material for suppressing coal dust explosion, a preparation method and application thereof. Background technique [0002] The information disclosed in the Background of the Invention is only intended to increase the understanding of the general background of the invention, and is not necessarily to be taken as an acknowledgment or any form of suggestion that the information constitutes the prior art that is already known to those skilled in the art. [0003] Coal dust explosion is one of the major disasters in coal mines. The explosion wave produced by the coal dust explosion can raise the coal dust deposited in the roadway, resulting in continuous explosions, even affecting the entire mine. When coal dust explodes, the explosion temperature can reach 2300-2500°C, the flame propagation speed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F5/08
CPCE21F5/08
Inventor 宫晨琛雷建国高新芦令超
Owner UNIV OF JINAN
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