Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A high-stability colloidal foam that inhibits the oxidation and self-heating of loose coal bodies and its preparation method

A high-stability, coal-body technology, used in ceramic products, mining equipment, earth-moving drilling, etc., can solve the problems of rapid water loss, short three-phase foam stabilization time, and limited oxygen isolation and cooling effect of loose coal bodies. Enhanced effect of air entrainment and expansion foaming effect

Active Publication Date: 2022-03-25
CHINA UNIV OF MINING & TECH +1
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing foam materials have poor wrapping and wetting effect on loose coal bodies, short oxygen isolation time, and have very limited oxygen barrier and cooling effects on large-scale loose coal bodies in gobs.
[0004] Fly ash three-phase foam, etc. use foaming agent to modify the surface of fly ash particles, and adsorb on the gas / liquid interface during the foaming process to achieve the effect of stabilizing the foam; but the three-phase foam still has a stable time The problem of short and fast water loss, its half-life is less than 20h, and the remaining solid particles after the foam loses water will dry and pulverize, which cannot completely cover the remaining coal, so it is difficult to achieve the purpose of long-term wetting of the coal body and covering the oxygen barrier

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A high-stability colloidal foam that inhibits the oxidation and self-heating of loose coal bodies and its preparation method
  • A high-stability colloidal foam that inhibits the oxidation and self-heating of loose coal bodies and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A high-stability colloidal foam that inhibits the self-heating of loose coal oxidation, made of the following raw materials in weight percentage: 58% water, 40% fly ash, 0.8% air-entraining agent, 0.6% film coating agent, cross-linked Agent 0.6%.

[0034] In this embodiment, the preparation method of the high-stability colloidal foam that inhibits the self-heating of loose coal oxidation, the specific steps are: firstly weigh the fly ash and the coating agent in proportion, fully disperse and dissolve them in water, and stir to obtain uniform fly ash suspension; secondly, add the air-entraining agent to the above-mentioned fly ash suspension in proportion, stir rapidly for 5-10 minutes, and make fly ash foam through the process of air-entraining foaming expansion; finally, add the cross-linking agent Add the fly ash foam in proportion and stir for 3 to 5 minutes to obtain a high-stability colloidal foam.

Embodiment 2

[0036] A high-stability colloidal foam that inhibits the oxidation and self-heating of loose coal bodies is made of the following raw materials in weight percent: 63% water, 35% fly ash, 0.8% air-entraining agent, 0.6% film coating agent, cross-linked Agent 0.6%.

[0037] In this embodiment, the preparation method of the high-stability colloidal foam that inhibits the oxidative self-heating of loose coal bodies is the same as that in Embodiment 1.

Embodiment 3

[0039] A high-stability colloidal foam that inhibits the self-heating of loose coal oxidation, made of the following raw materials in weight percentage: 69% water, 30% fly ash, 0.5% air-entraining agent, 0.3% film coating agent, cross-linked Agent 0.2%.

[0040] In this embodiment, the preparation method of the high-stability colloidal foam that inhibits the oxidative self-heating of loose coal bodies is the same as that in Embodiment 1.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-stability colloidal foam for inhibiting the self-heating of loose coal body oxidation and a preparation method thereof. The high-stability colloidal foam is made of the following raw materials in weight percent: 58-80% water, fly ash 19-40%, air-entraining agent 0.4-0.8%, coating agent 0.2-0.6%, cross-linking agent 0.2-0.6%. The preparation method of this high-stability colloidal foam is as follows: first weigh fly ash and coating agent in proportion, add water, fully stir to obtain uniform fly ash suspension; then add air-entraining agent to the above-mentioned powder in proportion In the coal ash suspension, stir rapidly for 5-10 minutes, and produce fly ash foam through the air-entraining foaming and expansion process; finally add a cross-linking agent in proportion, and stir for 3-5 minutes to obtain a high-stability colloidal foam. The high-stability colloidal foam of the present invention has good heat-resistant stability and excellent flame-retardant performance, can maintain moisture for a long time, moisten coal bodies, and stick to loose coal bodies such as coal left in mine goafs and coal fired in coal fields. It has a good binding effect and can form a layer of film on the surface of the coal body to isolate oxygen for a long time.

Description

technical field [0001] The invention relates to the technical field of coal spontaneous combustion prevention and control, in particular to a high-stability colloidal foam for inhibiting oxidative self-heating of loose coal bodies and a preparation method thereof. Background technique [0002] Coal is the main energy source in my country. The endowment characteristics of energy resources of "rich in coal, poor in oil, and low in gas" determine that the position of coal as the main energy source in my country will not change in the short term. However, at the present stage, the mining of underground coal resources in coal mines is facing a serious threat of coal spontaneous combustion in goafs, mainly because the coal with a tendency to spontaneous combustion is in a broken and piled state. Under the condition of continuous oxygen supply, it undergoes a series of physical and chemical reactions to oxidize and accumulate heat. Spontaneous combustion at the ignition point, and ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/28E21F5/08C04B111/28C04B111/40
CPCC04B26/28E21F5/08C04B2111/28C04B2111/40C04B18/08C04B2103/304C04B24/10C04B38/10
Inventor 史全林邵旭秦波涛鲍子怡徐镱桢郝明跃魏峥龙力华王辉
Owner CHINA UNIV OF MINING & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products