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Steel slag-based explosion suppression material for suppressing coal dust explosion and preparation method and application thereof

A technology based on steel slag and coal dust, applied in the fields of dust prevention, mining equipment, earthwork drilling, etc., can solve the problems of poor explosion suppression effect, mismatch between explosion suppression effect and explosion mechanism and history, and achieve excellent explosion suppression effect. , the effect of matching explosion suppression effect and simple preparation process

Inactive Publication Date: 2020-05-08
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the inventors found in the process of use that the anti-explosion effect of some existing anti-explosion materials does not match the mechanism and history of the explosion, resulting in poor anti-explosion effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for preparing a steel slag-based explosion-suppressing material for suppressing coal dust explosions, comprising the steps of:

[0043] (1) 40 parts by weight of steel slag particles, 3 parts by weight of a mass concentration of 20% hydrochloric acid solution and 0.5 parts by weight of ammonium persulfate are added to a four-necked flask as an oxidant, stirred for 1 hour at 50°C, and a mass concentration of 10% is used. % ammonia water to adjust the pH value to 9.0, stand still for 10 minutes, and separate the upper layer of flocculent turbid liquid and the lower layer of residue;

[0044] The obtained residue was extracted multiple times: the residue, 3 parts by weight of mass concentration of 20% hydrochloric acid solution and 0.5 parts by weight of ammonium persulfate were added to the four-necked flask again, stirred at 50°C for 1 hour, and stood still for 10 minutes. Separation, repeat 3 times, combine the flocculent turbid liquid obtained by multiple extr...

Embodiment 2

[0049] A method for preparing a steel slag-based explosion-suppressing material for suppressing coal dust explosions, comprising the steps of:

[0050] (1) Add 70 parts by weight of steel slag particles, 10 parts by weight of hydrochloric acid solution with a mass concentration of 40% and 1 part by weight of ammonium persulfate as an oxidant into a four-necked flask, stir at 60°C for 1.5 hours, and use 1mol / L Adjust the pH value to 9.5 with sodium hydroxide, let stand for 20 minutes, and separate the upper flocculent turbid liquid and the lower residue.

[0051] The obtained residue was extracted multiple times: the residue, 10 parts by weight of mass concentration of 40% hydrochloric acid solution and 1 part by weight of ammonium persulfate were added to the four-necked flask again, stirred at 60° C. for 1.5 hours, and stood still for 10 minutes. Separation, repeat 5 times, combine the flocculent turbid liquid obtained by multiple extractions, combine the residues obtained by...

Embodiment 3

[0056] A method for preparing a steel slag-based explosion-suppressing material for suppressing coal dust explosions, comprising the steps of:

[0057] (1) 50 parts by weight of steel slag particles, 8 parts by weight of hydrochloric acid solution with a mass concentration of 30% and 0.8 parts by weight of sodium persulfate are added to a four-necked flask as an oxidizing agent, and stirred for 1.5 hours at 55°C. Adjust the pH value to 8.5 with ammonia water, stand still for 15 minutes, and separate the upper layer of flocculent turbid liquid and the lower layer of residue.

[0058] The obtained residue was extracted several times: the residue, 8 parts by weight of mass concentration of 30% hydrochloric acid solution and 0.8 parts by weight of ammonium persulfate were added to the four-necked flask again, stirred at 55°C for 1.5 hours, stood still for 10 minutes, and separated , repeat 5 times, combine the flocculent turbid liquid obtained by multiple extractions, combine the ...

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Abstract

The invention belongs to the technical field of explosion suppression materials, and particularly relates to a steel slag-based explosion suppression material for suppressing coal dust explosion and apreparation method and application thereof. The method comprises the following steps of 1) mixing steel slag particles, an acid solution capable of dissolving aluminum and iron elements in steel slag, and persulfate, stirring under a heating condition, then adjusting the pH of the reaction solution to be alkaline, and standing to obtain an upper flocculent turbid solution and lower residues; andthen separating the flocculent turbid solution and the residues; 2) stirring and washing the flocculent turbid solution with water, dropwise adding amino modified polydimethylsiloxane for reaction, separating out a solid product, drying and grinding to obtain superfine filling powder; 3) washing the residues, then steaming and curing, and then carbonizing to obtain porous residues; and 4) fillingthe superfine filling powder into pores of the porous residues by adopting a vacuum suction filtration method, adding ettringite, cement and water, mixing into particles, and drying to obtain the steel slag-based explosion suppression material. According to the invention, the steel slag is used as a basic preparation raw material, and the obtained explosion suppression material has a good explosion suppression effect.

Description

technical field [0001] The invention belongs to the technical field of explosion suppression materials, and in particular relates to a steel slag-based explosion suppression material for suppressing coal dust explosions, 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 a reaction process in which oxygen in the air and coal dust are rapidly oxidized under the action of a heat source with high temperature or certain ignition energy. It is a major disaster accident in mines. Its complex chain reaction includes the following four processes: (1) When the combustible coal exists in the state of po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F5/08E21F5/12
CPCE21F5/08E21F5/12
Inventor 宫晨琛雷建国高新芦令超
Owner UNIV OF JINAN
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