Method for preparing high-temperature resistant corrosion-resistant mullite silicon carbide castingmaterial

A technology of mullite silicon carbide and castables, which is applied in the field of mullite silicon carbide castables, can solve the problems of material fire resistance, corrosion resistance reduction, cracks, peeling, etc., and improve chemical corrosion resistance and wear resistance , Improve the preparation efficiency and prolong the service life

Inactive Publication Date: 2019-04-26
江苏长城窑炉工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the production process of the original mullite silicon carbide castable, the rotary kiln is generally used for high-temperature melting and injection. Due to the long-term use of the rotary kiln, the heavy load increases, and the refractoriness and corrosion resistance of the material are reduced, which affects the long-term use. Benefits, long-term peeling, falling blocks, cracks and other phenomena may occur, reducing the service life and causing waste

Method used

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  • Method for preparing high-temperature resistant corrosion-resistant mullite silicon carbide castingmaterial

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] see figure 1 , a method for preparing a high-temperature-resistant and corrosion-resistant mullite silicon carbide castable, comprising the steps of:

[0025] S1. Preparation of mullite silicon carbide castables, based on ingredients and components, in coarse aggregate: mullite 10%, zirconia fiber 3.3%, in medium aggregate: coke gem 12%, silicon carbide 23%, zirconium Stone 1.3%, fine aggregate: mullite 24%, binder: magnesium silicate 13%, phosphate 23%, silicon micropowder 4%, yttrium oxide 7%, and the rest are impurities;

[0026] S2. Crushing, screening, re-crushing, and re-screening the mullite to obtain mullite powder;

[0027] S3, fully mixing the mullite powder prepared in the step S2 with the zirconia fiber particles in proportion to obtain a coarse aggregate;

[0028] S4, crushing, screening, crushing, and re-screening the burnt gemstones to obtain burnt gemstone powder;

[0029] S5, crushing, screening, crushing and re-screening the silicon carbide to obtai...

Embodiment 2

[0040] see figure 1 , a method for preparing a high-temperature-resistant and corrosion-resistant mullite silicon carbide castable, comprising the steps of:

[0041] S1. Preparation of mullite silicon carbide castables. According to the ingredients and components, in the coarse aggregate: mullite 6%, zirconia fiber 3%, in the medium aggregate: coke gem 8%, silicon carbide 20%, zirconium Stone 1%, fine aggregate: mullite 18%, binder: magnesium silicate 13%, phosphate 20%, silicon micropowder 3%, yttrium oxide 6%, and the rest are impurities;

[0042] S2. Crushing, screening, re-crushing, and re-screening the mullite to obtain mullite powder;

[0043] S3, fully mixing the mullite powder prepared in the step S2 with the zirconia fiber particles in proportion to obtain a coarse aggregate;

[0044] S4, crushing, screening, crushing, and re-screening the burnt gemstones to obtain burnt gemstone powder;

[0045] S5, crushing, screening, crushing and re-screening the silicon carbid...

Embodiment 3

[0056] see figure 1 , a method for preparing a high-temperature-resistant and corrosion-resistant mullite silicon carbide castable, comprising the steps of:

[0057] S1. Preparation of mullite silicon carbide castables. According to the ingredients and components, in the coarse aggregate: mullite 8%, zirconia fiber 3.5%, in the medium aggregate: coke gem 12%, silicon carbide 20%, zirconium Stone 1.5%, fine aggregate: mullite 20%, binder: magnesium silicate 10%, phosphate 12%, silicon micropowder 5%, yttrium oxide 8%, and the rest are impurities;

[0058] S2. Crushing, screening, re-crushing, and re-screening the mullite to obtain mullite powder;

[0059] S3, fully mixing the mullite powder prepared in the step S2 with the zirconia fiber particles in proportion to obtain a coarse aggregate;

[0060] S4, crushing, screening, crushing, and re-screening the burnt gemstones to obtain burnt gemstone powder;

[0061] S5, crushing, screening, crushing and re-screening the silicon c...

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Abstract

The invention discloses a method for preparing a high-temperature resistant corrosion-resistant mullite silicon carbide castingmaterial. The method comprises the following step: preparing a mullite carbon silicon casting material, wherein crude aggregate comprises 6-13% of mullite and 3-5% of a zirconium oxide fiber; medium aggregate comprises 8-15% of flint clay, 20-25% of carbon silicon and 1-1.5% of zircon; fine aggregate comprises 18-27% of mullite; an adhesive comprises 10-15% of magnesium silicate, 12-27% of phosphate, 3-5% of silicon micro powder, 6-8% of yttrium oxide and the balance of impurities. On premise that the stability of the zirconium oxide fiber is maintained by using the yttrium oxide, the zirconium oxide fiber is tightly combined with a product converted at a high temperature, then the chemical corrosion resistance and the wearing resistance of the mullite fiber fire-refectory casting material can be improved, the temperature in a vacuum cavity with a mullite fiberfire-refectory casting material layer is effectively ensured, an effect of corrosion and high-temperature resistance can be achieved, and the service life can be prolonged.

Description

technical field [0001] The invention belongs to the technical field of mullite silicon carbide castable, and more specifically relates to a method for preparing a high-temperature-resistant and corrosion-resistant mullite silicon carbide castable. Background technique [0002] Injection material, also known as refractory castable, is a granular and powdery material made of refractory material with a certain amount of binder. It has high fluidity and is formed by pouring. The mixture composed of refractory aggregate, binder and admixture is mixed with water (or liquid binder) to form a mud material that can be constructed by pouring method. The difference from other amorphous refractory materials is that the refractory castable has a certain degree of condensation after construction. Therefore, it takes a certain period of curing after casting to be molded, and then it can be put into baking after an appropriate period of natural curing. The production process of refractory c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/185C04B35/565C04B35/626C04B35/80
CPCC04B35/185C04B35/565C04B35/6261C04B35/66C04B35/80C04B2235/3225C04B2235/3248C04B2235/3418C04B2235/3445C04B2235/349C04B2235/447C04B2235/5236
Inventor 钱庆吴占强
Owner 江苏长城窑炉工程有限公司
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