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Medium-density high-aluminum silicon carbide castable and preparation method thereof

A high-alumina silicon carbide and castable technology, which is applied in the field of refractory materials, can solve the problems of easy cracking of materials and local overheating, and achieve the effects of reducing porosity, reducing dosage, and low thermal conductivity

Active Publication Date: 2017-11-14
长兴兴鹰新型耐火建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of lightweight aggregate can reduce the thermal conductivity, but it will cause local overheating, and the material is easy to crack

Method used

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  • Medium-density high-aluminum silicon carbide castable and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] A medium-density high-alumina silicon carbide castable, the components of which include by weight: 10 parts of lightweight mullite aggregates with a particle size of 3-8mm, and 12 parts of lightweight alumina aggregates with a particle size of 3-5mm , 13 parts of iron hook waste, 13 parts of silicon molybdenum waste aggregate, 5 parts of silicon carbide powder with a particle size of less than 0.088 mm, 5 parts of silicon micropowder with a particle size of less than 1 μm, and Al with a particle size of less than 1.2 μm 2 o 3 3 parts of fine powder, 4 parts of calcium aluminate cement, 0.02 part of sodium tripolyphosphate, 0.01 part of melamine formaldehyde tree, and 1.5 parts of alloy steel fiber with a diameter of less than 0.3 mm and a length of 20-25 mm.

[0023] Prepare the castable according to the following steps: mix the raw materials of the castable above, add 4% water and stir evenly, pour the stirred material into the mold, vibrate and form, bake after curin...

Embodiment 2

[0025] A medium-density high-alumina silicon carbide castable, the components of which include by weight: 15 parts of lightweight mullite aggregates with a particle size of 3-8mm, and 14 parts of lightweight alumina aggregates with a particle size of 3-5mm , 13 parts of iron hook waste, 14 parts of silicon molybdenum waste aggregate, 6 parts of silicon carbide powder with a particle size of less than 0.088 mm, 6 parts of silicon micropowder with a particle size of less than 1 μm, and Al with a particle size of less than 1.2 μm 2 o 3 3 parts of fine powder, 5 parts of calcium aluminate cement, 0.18 parts of sodium tripolyphosphate, 0.09 parts of melamine formaldehyde tree, and 1.8 parts of alloy steel fibers with a diameter of less than 0.3 mm and a length of 20-25 mm.

[0026] Prepare the castable according to the following steps: mix the raw materials of the castable above, add 4% water and stir evenly, pour the stirred material into the mold, vibrate and form, bake after cu...

Embodiment 3

[0028] A medium-density high-alumina silicon carbide castable, the components of which include by weight: 18 parts of lightweight mullite aggregates with a particle size of 3-8mm, and 14 parts of lightweight alumina aggregates with a particle size of 3-5mm , 13 parts of iron hook waste, 14 parts of silicon molybdenum waste aggregate, 8 parts of silicon carbide powder with a particle size of less than 0.088 mm, 7 parts of silicon micropowder with a particle size of less than 1 μm, and Al with a particle size of less than 1.2 μm 2 o 3 4 parts of micro powder, 5 parts of dolomite cement, 0.2 part of sodium tripolyphosphate, 0.1 part of melamine formaldehyde tree, and 2.0 parts of alloy steel fiber with a diameter of less than 0.3mm and a length of 20-25mm.

[0029] Prepare the castable according to the following steps: mix the raw materials of the castable above, add 5% water and stir evenly, inject the stirred material into the mold, vibrate and form, bake after curing for 64 h...

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Abstract

The invention discloses a medium-density high-aluminum silicon carbide castable which is prepared from the following components in parts by mass: 10-20 parts of light mullite aggregate with particle size of 3-8mm, 10-20 parts of light alumina aggregate with particle size of 3-5mm, 10-20 parts of iron hook waste, 10-20 parts of silicon-mullite waste aggregate, 5-10 parts of silicon carbide powder with particle size of less than 0.088mm, 5-8 parts of silica powder with particle size of less than 1mu m, 3-5 parts of Al2O3 micropowder with particle size of less than 1.2mu m, 3-8 parts of aluminate cement, 0.03-0.5 part of water reducing agent and 1.5-2.3 parts of alloy steel fiber with diameter of less than 0.3mm and length of 20-25mm. The medium-density high-aluminum silicon carbide castable disclosed by the invention has good density, thermal shock resistance, alkali resistance, wear resistance and erosion resistance, and does not crack easily; moreover, the raw materials can be saved effectively, and the cost is reduced.

Description

technical field [0001] The invention relates to the technical field of refractory materials, in particular to a medium-density high-aluminum silicon carbide castable and a preparation method thereof. Background technique [0002] In recent years, with the promotion and development of new dry process cement technology, the use of new dry process cement kilns has become more and more mature in China, and the technology has become more and more perfect. One of the important factors of rate. Although cement manufacturers choose refractory materials with different performance requirements (high temperature resistance, wear resistance, corrosion resistance, skinning resistance, etc.) in different parts according to their actual conditions, the actual service life of refractory materials in many parts is still relatively short, such as Cement rotary kiln kiln hood, tertiary air pipe elbow and other parts are subject to high temperature, high wind speed, heavy alkaline components, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/103C04B35/185C04B35/622
Inventor 山国强许高王强
Owner 长兴兴鹰新型耐火建材有限公司
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