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

Material of yellow mud added with gel for preventing spontaneous combustion of residual coal

A technology of yellow mud and coal residue, applied in the field of new fire-fighting materials, can solve problems such as high operating costs, different effects, and complex technologies

Inactive Publication Date: 2015-04-22
UNIV OF SCI & TECH BEIJING
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nitrogen injection technology has played a very good role in fire prevention and extinguishing work, but in the long run, nitrogen accounts for 78% of the air, and high concentrations of nitrogen are effective in preventing and extinguishing fires, but the efficiency of sealing high concentrations of nitrogen in gobs is low , high operating costs, complex technology and other issues, it is necessary to further optimize the inert gas (nitrogen, carbon dioxide); liquid yellow mud grouting is an earlier technology for fire prevention and extinguishing. It is very difficult to cover the floating coal with yellow mud due to the long working face and the super-large goaf. Once a fire occurs, the characteristics of the liquid flowing to the lower place make this technology difficult to use, slow in response and poor in reliability; pressure equalization The premise of the application of fire prevention technology is effective sealing, and there are many air plugging technologies. The cost and effect of polyurethane foam materials, ammonia colloid materials and foam cement materials are very different, and further optimization is needed

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
  • Material of yellow mud added with gel for preventing spontaneous combustion of residual coal
  • Material of yellow mud added with gel for preventing spontaneous combustion of residual coal
  • Material of yellow mud added with gel for preventing spontaneous combustion of residual coal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: Determination of the ratio of adding gel material to yellow mud

[0015] The gel material added to yellow mud is mainly composed of yellow mud, water, coagulant, and polymer additives. The main factors that affect the gelation time of adding gel materials to yellow mud are: A—water-soil ratio, B—the amount of base material (accounting for the slurry quality), C—the amount of coagulant (accounting for the slurry quality), D— The amount of polymer additives per ‰ (accounting for the mass of the slurry), each factor takes three levels, as shown in Table 1.

[0016] Table 1 Influencing factors and factor levels of adding gel materials to yellow mud

[0017]

[0018] According to Table 1, the factors affecting the gelation time of yellow mud adding gel material and the levels of each factor, select L 9 (3 4 ) Orthogonal experiment table arrangement experiment, experiment order arrangement and the final result of each experiment are shown in Table 2 below....

Embodiment 2

[0030] Example 2: Cost Analysis

[0031] The cost of adding gel material to yellow mud is related to the requirement of gelation time during use. The gelation time is different, the ratio of materials is different, and the cost of materials used is also different. According to the optimal ratio gelling time obtained in the final experiment, when the gelling time is 3.24 minutes, the consumption and cost of raw materials for pure silicic acid gel and yellow mud slurry added gel are compared and analyzed, as shown in Table 4.

[0032] It can be seen from the calculation of the data in Table 4 that under the same gelation time, the cost of adding gel material to the yellow mud slurry with the optimal ratio is more than 25% lower than that of pure gel.

[0033] Table 4 Comparative Analysis of Cost of Colloidal Raw Materials

[0034]

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

No PUM Login to View More

Abstract

The invention discloses a material of yellow mud added with gel for preventing spontaneous combustion of residual coal. The universality of yellow mud grouting and the fire preventing and extinguishing property of colloid are combined; and a mine goaf fire-fighting material with low cost and good fire extinguishing performance is developed, and is prepared from yellow mud, a base material, a coagulant and a polymeric additive; the water-soil ratio of the yellow mud is 4:1; 3-5wt% of base material, 4.5-5.5wt% of coagulant and 0.072-0.078wt% of polymeric additive are externally added; sodium bicarbonate is selected as the coagulant; and the polymer additive is sodium polyacrylate or polyacrylamide. The material disclosed by the invention is high in moisture content, good in inhibition effect, and safe to use; the cost is over 25% less than that of pure silicic acid gel; and the longer the required gelation time is, the fewer the used material is, and the lower the cost is. The material is a novel mine fire preventing and extinguishing material with low cost and high performance.

Description

Technical field: [0001] The invention belongs to the field of fire-preventing materials, and relates to a novel fire-preventing material for preventing spontaneous combustion of leftover coal in goafs in mines. Background technique: [0002] With the rapid development of coal mining technology, the situation of coal seam spontaneous combustion fire prevention and control is becoming more and more severe. As long as the coal seam is prone to spontaneous combustion, all existing fire prevention and extinguishing technical measures are blindly adopted, which lacks pertinence and scientificity. Nitrogen injection technology has played a very good role in fire prevention and extinguishing work, but in the long run, nitrogen accounts for 78% of the air, and high-concentration nitrogen is effective in fire prevention and extinguishing, but the efficiency of sealing high-concentration nitrogen in gobs is low , high operating costs, complex technology and other issues, it is necessar...

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): C04B28/26C04B14/10
Inventor 黄志安高玉坤张英华周佩玲王辉黄梦钰
Owner UNIV OF SCI & TECH BEIJING
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

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com