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High-porosity foam for prevention and control of coal spontaneous combustion in goaf and preparation method thereof

A goaf and coal spontaneous combustion technology, applied in applications, ceramic products, household utensils, etc., can solve the problems of left coal ignition, disaster accidents, etc., and achieve the effects of inhibiting spontaneous combustion, ensuring safe production, and realizing storage

Active Publication Date: 2021-07-30
SHANDONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the natural combustion of coal left in the underground goaf is serious, which is likely to cause major disasters and accidents

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Raw materials and parts by weight are:

[0032] 30 parts of carbide slag, 30 parts of fly ash, 5 parts of silicone resin polyether emulsion, 3 parts of curing agent, 28 parts of foaming agent, and 4 parts of surfactant.

[0033] The preparation method is:

[0034] The first step is to add calcium carbide slag, fly ash, curing agent and foaming agent into the mixing tank, and stir to form alkali powder;

[0035] In the second step, water, foam stabilizer and surfactant are sequentially added to the alkali material powder in the first step, and stirred to form an alkaline foam slurry;

[0036] The third step is to add hydrogen peroxide to the alkaline foam slurry obtained in the second step, stir evenly, and continuously transport it to the goaf with a grouting pump, and the alkaline foam slurry will undergo secondary foaming under the action of hydrogen peroxide. After curing, it forms a high-porosity foam in the goaf;

[0037] The fourth step is to transport CO to th...

Embodiment 2

[0039] Raw materials and parts by weight are:

[0040] 70 parts of kiln dust, 10 parts of blast furnace slag, 1 part of silicone resin polyether emulsion, 1 part of curing agent, 15 parts of foaming agent, 3 parts of surfactant.

[0041] The preparation method is the same as in Example 1.

Embodiment 3

[0043] Raw materials and parts by weight are:

[0044] 65 parts of cement dust, 10 parts of blast furnace slag, 1 part of silicone resin polyether emulsion, 1 part of curing agent, 15 parts of foaming agent, and 8 parts of surfactant.

[0045] The preparation method is the same as in Example 1.

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PUM

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Abstract

The invention discloses a high-porosity foam used for preventing and controlling coal spontaneous combustion in goafs and a preparation method thereof, and belongs to the technical field of greenhouse gas emission reduction and coal mine safety production. According to parts by weight, it includes raw materials: 30-70 parts of alkaline materials, the basic materials are calcium carbide slag, kiln dust, cement dust or a combination of several kinds; 10-30 parts of reinforcing agents, the reinforcing agent It is fly ash, blast furnace slag or a combination of the two; 1-5 parts of foam stabilizer, said foam stabilizer is silicone resin polyether emulsion; 1-3 parts of curing agent, said curing agent is made of sodium aluminate Composed of anhydrous gypsum; foaming agent 15-28 parts, the foaming agent is composed of hydrogen peroxide and hydrogen peroxide activator. The invention can realize the foaming of alkaline waste, transport the industrial alkaline waste to the goaf in a large flow with the foam as the carrier, and realize three-dimensional distribution in the large space of the gob; fully utilize the high-yield industrial alkaline waste, which is beneficial to protect the environment.

Description

technical field [0001] The invention relates to the technical field of greenhouse gas emission reduction and coal mine safety production, in particular to a high-porosity foam used for prevention and control of coal spontaneous combustion, filling reinforcement and carbon retention in goafs and a preparation method thereof. Background technique [0002] The economic model based on low energy consumption, low pollution and low emission has become the main feature and trend of the world's economic development. China is a country where coal is the main energy source, about 50% of CO 2 It comes from coal-based power generation, so the research and application of CCS technology is crucial to the realization of my country's CO 2 Emission reduction is of great significance. [0003] The mined-out area formed after coal mining, especially the old goaf in deep well has good CO 2 Adsorption and airtightness. There are about 7,000 coal mines in my country, with CO 2 Great potentia...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/16C04B38/02C04B111/28
CPCC04B28/16C04B2111/00724C04B2111/285C04B22/0093C04B18/0481C04B18/08C04B24/42C04B22/068C04B2103/0068C04B24/16C04B38/02C04B18/06C04B18/142C04B7/00
Inventor 陆伟亓冠圣贺正龙路瑶吴磊郭宝龙胡浩孔彪李金亮
Owner SHANDONG UNIV OF SCI & TECH
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