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Low-aluminum anti-corrosion castable

An anti-corrosion and castable technology, applied in the field of refractory materials, can solve problems such as spalling, lining cracks, stress concentration, etc., and achieve the effect of strong chemical corrosion resistance, long service life, and not easy to crack and peel off.

Inactive Publication Date: 2019-02-05
无锡远能耐火材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The castables generally used in waste incinerators are high-alumina castables. High-alumina castables have high strength and good wear resistance at high temperatures, but high-alumina castables form corundum-based mineral phases at high temperatures. It is easy to react with alkali at high temperature, the volume expansion will cause deformation, stress concentration will occur, and the lining will crack and peel off, etc.
Because the kiln hood in the rotary kiln system is constantly scoured by hot clinker, coupled with constant changes in thermal parameters, the service life of the refractory castable on the top of the kiln hood is generally short

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The low-aluminum anti-corrosion castable is prepared from the following raw materials, and the raw materials are proportioned by weight: 38 parts of coke gemstone, 22 parts of corundum powder, 8 parts of zircon, 7 parts of alumina micropowder, 7 parts of silicon carbide, silicon dioxide 4 parts of fine powder, 6 parts of kyanite, 1 part of bauxite, 2 parts of periclase, 6 parts of pure calcium aluminate cement, 0.4 part of dispersant, 0.05 part of retarder, and 0.02 part of water reducing agent.

[0012] Wherein, the water reducer is a naphthalene-based water reducer.

[0013] The dispersant is sodium polyphosphate.

[0014] The retarder is citric acid.

Embodiment 2

[0016] The low-alumina anti-corrosion castable is prepared from the following raw materials, and the raw materials are proportioned by weight: 40 parts of coke gemstone, 25 parts of corundum powder, 8 parts of zircon, 8 parts of alumina micropowder, 6 parts of silicon carbide, silicon dioxide 3 parts of fine powder, 7 parts of kyanite, 1-2 parts of bauxite, 2 parts of periclase, 7 parts of pure calcium aluminate cement, 0.3 part of dispersant, 0.1 part of retarder, and 0.02 part of water reducing agent.

[0017] Wherein, the water reducer is lignosulfonate water reducer.

[0018] The dispersant is sodium polyacrylate.

[0019] The retarder is oxalic acid.

Embodiment 3

[0021] The low-aluminum anti-corrosion castable is prepared from the following raw materials, and the raw materials are proportioned by weight: 37 parts of coke gemstones, 22 parts of corundum powder, 7 parts of zircon, 6 parts of alumina micropowder, 6 parts of silicon carbide, and silicon dioxide 3 parts of fine powder, 7 parts of kyanite, 2 parts of bauxite, 1 part of periclase, 8 parts of pure calcium aluminate cement, 0.1 part of dispersant, 0.1 part of retarder, 0.02 part of water reducing agent.

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PUM

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Abstract

The invention belongs to the technical field of refractory materials and specifically relates to a low-aluminum anti-corrosion castable which is prepared from the following raw materials in parts by weight: 35-40 parts of flint clay, 20-25 parts of alundum powder, 5-10 parts of zircon, 5-8 parts of alumina micro powder, 5-6 parts of silicon carbide, 3-5 parts of silicon dioxide micro powder, 5-7 parts of kyanite, 1-2 parts of alumina, 1-3 parts of periclase, 5-8 parts of pure calcium aluminate cement, 0.1-0.5 part of dispersing agent, 0.05-0.1 part of retarder and 0.02-0.05 part of water reducing agent. The low-aluminum anti-corrosion castable provided by the invention has the advantages of strong resistance to chemical corrosion, rare cracking or peeling of lining and long service life.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a low-aluminum corrosion-resistant castable. Background technique [0002] The castables generally used in waste incinerators are high-alumina castables. High-alumina castables have high strength and good wear resistance at high temperatures, but high-alumina castables form corundum-based mineral phases at high temperatures. It is easy to react with alkali at high temperature, the volume expansion will cause deformation, stress concentration will occur, and the lining will crack and peel off. Because the kiln hood in the rotary kiln system is constantly scoured by hot clinker, coupled with constant changes in thermal parameters, the service life of the refractory castable on the top of the kiln hood is generally short. Contents of the invention [0003] The object of the present invention is to provide a low-aluminum anti-corrosion castable for the def...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3206C04B2235/3217C04B2235/3248C04B2235/3418C04B2235/349C04B2235/3826C04B2235/5228C04B2235/9669
Inventor 罗佳李淑静姚伯洪姚英俞江
Owner 无锡远能耐火材料有限公司