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

Special casting material of coal-injection duct

A castable and coal-injection pipe technology, which is applied in the field of refractory materials, can solve problems such as thermal spalling, non-wear resistance, and unsatisfactory use of coal-injection pipe castables, so as to improve seismic stability, reduce internal stress, and improve no wear effect

Inactive Publication Date: 2014-02-05
NINGXIA TIANZONG HONGGUANG COGENERATION TECH
View PDF1 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the above-mentioned relatively harsh working environment, the castables for coal injection pipes have always been unsatisfactory in use, and the phenomenon of non-wear resistance and thermal spalling often occurs, which restricts the normal operation of cement kilns to a certain extent and affects the economic benefits of cement manufacturers.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A special castable for coal injection pipes, which comprises the following components in weight percentage:

[0021] Silicon carbide 5~15%;

[0022] Andalusite 15~30%;

[0023] Corundum 10~25%;

[0024] Spinel powder 5~15%;

[0025] Silicon boride powder 15~20%;

[0026] Zircon powder 5~10%;

[0027] Mullite powder 5~10%;

[0028] Aluminum oxide powder 5~15%;

[0029] Silica powder 3~8%;

[0030] Pure calcium aluminate cement 2~5%;

[0031] And 0.3% of explosion-proof fiber and 0.3% of sodium hexametaphosphate accounted for the total weight of the above components.

Embodiment 2

[0033] A special castable for coal injection pipes, which comprises the following components in weight percentage:

[0034] Silicon carbide 5~10%;

[0035] Andalusite 12~20%;

[0036] Corundum 15~20%;

[0037] Spinel powder 10~15%;

[0038] Silicon boride powder 15~18%;

[0039] Zircon powder 5~8%;

[0040] Mullite powder 5~8%;

[0041] Aluminum oxide powder 10~15%;

[0042] Silica powder 3~5%;

[0043] Pure calcium aluminate cement 2~4%;

[0044] And 0.3% of explosion-proof fiber and 0.3% of sodium hexametaphosphate accounting for the total weight of the above components.

Embodiment 3

[0046] A special castable for coal injection pipe, the weight percentage of the components contained in it is:

[0047] Silicon carbide 6%;

[0048] Andalusite 14%;

[0049] Corundum 18%;

[0050] Spinel powder 12%;

[0051] Silicon boride powder 19%;

[0052] Zircon powder 6%;

[0053] Mullite powder 7%;

[0054] Alumina fine powder 11%;

[0055] Silica powder 4%;

[0056] Pure calcium aluminate cement 3%;

[0057] And 0.3% of explosion-proof fiber and 0.3% of sodium hexametaphosphate accounting for the total weight of the above components.

[0058] The components used in the above examples are products well known to those skilled in the art and can be purchased in the market. The addition of corundum is beneficial to the wear resistance of the castable, and silicon carbide is compounded with aluminum-silicon in the material. Andalusite has micro-expansion, which is used to improve the thermal shock stability of the castable, ensure its high-temperature volume stabil...

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 special-purpose casting material of a coal-injection duct. The special-purpose casting material comprises the following components in percentage by weight: 5%-15% of silicon carbide, 15%-30% of andalusite, 10%-25% of corundum, 5%-15% of spinel powder, 15%-20% of silicon boride powder, 5%-10% of zirconite powder, 5%-10% of mullite powder, 5%-15% of aluminum oxide micro powder, 3%-8% of silicon micro powder, 2%-5% of pure calcium aluminate cement, as well as anti-explosion fiber and sodium hexametaphosphate which respectively account for 0.3% of the total weight of the components. The special casting material of the coal-injection duct disclosed by the invention has seismic stability, high temperature resistance, volume stability and abrasive resistance, has high strength, and can be used for improving the defects that the coal-injection duct is not wear-resisting and not thermal-spalling-resistant, so that the service life of a cement kiln coal-injection duct is prolonged to about 12-15 months from about 6-8 months at present.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a special castable for coal injection pipes. Background technique [0002] Compared with qualitative refractory products, unshaped refractory materials represented by refractory castables have the advantages of short process flow, low production energy consumption and cost, convenient use, wide application range, integrity and good use effect, so they are widely used in the world. It has developed rapidly, and its proportion in the whole refractory material is getting higher and higher. In some countries with advanced refractory technology, the output of unshaped refractories has approached or even exceeded the output of shaped products. For example, the current output of unshaped refractory materials in Japan accounts for about 60% of the total refractory materials; in the United States, it is about 50%; in Britain, Germany, France and other countries, ...

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 Applications(China)
IPC IPC(8): C04B35/66
Inventor 穆祥王西来董伟胜刘文艳解仁刘朝晖苏新国王淑娟
Owner NINGXIA TIANZONG HONGGUANG COGENERATION 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

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