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High-strength, wear-resistant and quick-change preform

A prefabricated and high-strength technology, applied in the field of refractory materials, can solve the problems of insufficient wear resistance and thermal shock stability, affect the service life of prefabricated parts, and affect the service life of rotary kilns, etc., to shorten maintenance time and enhance thermal shock stability , enhance the effect of wear resistance

Active Publication Date: 2012-06-27
ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The prefabricated part can be directly placed on the head of the coal injection pipe, which is convenient for construction and maintenance, safe and reliable, and greatly shortens the construction period. The high temperature resistance and wear resistance are better than castables. Component, which is calcium salt, in the component system of the preform, the calcium salt will produce a low melting point phase at high temperature, which will affect the thermal performance of the preform, thereby affecting the service life of the preform. The service life of the preform is 6~7 months, thus affecting the service life of the rotary kiln
The prefabricated parts made of the existing prefabricated product formula have insufficient wear resistance and thermal shock stability, are prone to bursting, abrasion, erosion and other phenomena, and have a short service life, seriously affecting the normal operation of the cement kiln, and are not suitable for cement production kilns The use of high temperature and high strength in furnace low wall and other parts

Method used

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  • High-strength, wear-resistant and quick-change preform

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] A high-strength wear-resistant quick-change prefabricated part, the weight of each component is as follows: mullite: 10 parts, silicon carbide: 25 parts, waste silicon molybdenum brick: 16 parts, the aluminum content is 85%, and the particle size is 5mm. Bauxite homogenizing material: 10 parts, scrap iron hook material: 10 parts, mullite hollow ball: 15 parts, alumina powder: 8 parts, silicon micropowder: 6 parts, plus sodium tripolyphosphate accounting for the above total amount 0.08% and water 5%.

Embodiment 2

[0052] A high-strength wear-resistant quick-change prefabricated part, the parts by weight of each component are as follows: mullite: 30 parts, silicon carbide: 10 parts, waste silicon molybdenum bricks with a particle size of 2mm after crushing and screening: 10 parts , bauxite homogenized material with an aluminum content of 90% and a particle size of 7mm: 14 parts, after crushing and screening, scrap iron hook materials with a particle size of 10mm: 25 parts, mullite hollow balls: 5 parts, oxidized Aluminum powder: 3 parts, silicon micropowder: 3 parts, plus 0.20% of sodium hexametaphosphate and 7% of water accounting for the above total amount.

Embodiment 3

[0054] A high-strength wear-resistant quick-change prefabricated part, the parts by weight of each component are as follows: mullite: 15 parts, silicon carbide: 17 parts, waste silicon molybdenum bricks with a particle size of 12mm after crushing and screening: 20 parts , bauxite homogenized material with an aluminum content of 88% and a particle size of 6mm: 20 parts, after crushing and screening, scrap iron hook materials with a particle size of 1mm: 12 parts, mullite hollow balls: 8 parts, oxidized Aluminum powder: 5 parts, silicon micropowder: 3 parts, plus 0.15% of sodium tripolyphosphate and sodium hexametaphosphate and 6% of water accounting for the above total amount.

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Abstract

The invention discloses a high-strength, wear-resistant and quick-change preform, belonging to the field of refractory material. The high-strength, wear-resistant and quick-change preform disclosed by the invention contains components in the following parts by weight: 10-30 parts of mullite, 10-25 parts of silicon carbide, 10-20 parts of waste silicon-mullite bricks, 10-20 parts of a homogenizing material, 10-25 parts of a waste iron hook material, 5-15 parts of mullite hollow spheres, 3-8 parts of alumina powder, 3-6 parts of silica micropowder and sodium tripolyphosphate occupying 0.08-0.2% of the total. The high-strength, wear-resistant and quick-change preform disclosed by the invention is good in wear resistance and thermal shock stability, simple in construction, convenient in detachment, long in life, low in cost and especially suitable for being used in cement kiln.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a high-strength wear-resistant quick-change prefabricated part. Background technique [0002] At present, refractory materials in cement kilns are usually cast on-site with wear-resistant refractory castables, which need to be fixed with welding anchors. The castables need to be cured and baked. Long-term maintenance can ensure good strength and service life. For cement companies, every day of production shutdown means a large loss of economic benefits. Therefore, castables are often put into use quickly when their strength is not fully exerted, resulting in accelerated wear and shortened service life of on-site castables. , The use cycle is short, generally 2 to 4 months. Prefabricated parts are specific prefabricated products of different shapes produced by completing the pouring, curing and heat treatment processes in advance, which can solve the shortcomings of castables ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66B09B3/00
Inventor 常正钦朱锦和朱国平山国强朱其良彭晶晶王琪佘春萍
Owner ZHEJIANG KINGCRED NEW MATERIAL CO LTD
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