High-aluminum silicon carbide casting material combined with silica sol

A high-aluminum silicon carbide and silica sol technology, which is applied in the field of high-aluminum silicon carbide castables, can solve the problems of a large decrease in strength, and achieve the effects of good thermal shock stability, easy sintering, and improved performance.

Inactive Publication Date: 2012-03-21
郑州京华耐火材料实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the binder used in refractory castables is cement, and the strength decreases a lot after medium-temperature firing, and a high-alumina silicon carbide castable is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A high-alumina silicon carbide castable combined with silica sol, which is made of the following raw materials: 80 kg of bauxite with a particle size of 8-0 mm, 15 kg of silicon carbide with a particle size of 180 mesh, and α -Al 2 o 3 7 kg of fine powder, 5 kg of kyanite with a particle size of 80 mesh, 15 kg of brown corundum with a particle size of 160 mesh, 5 kg of sodium tripolyphosphate, and 10 kg of silica sol.

Embodiment 2

[0032] A high-alumina silicon carbide castable combined with silica sol, which is made of the following raw materials: 60 kg of bauxite with a particle size of 8-0 mm, 10 kg of silicon carbide with a particle size of 320 mesh, and α -Al 2 o 3 2 kg of fine powder, 2 kg of kyanite with a particle size of 120 mesh, 10 kg of brown corundum with a particle size of 200 mesh, 2 kg of sodium tripolyphosphate, and 5 kg of silica sol.

Embodiment 3

[0034] A high-alumina silicon carbide castable combined with silica sol, which is made of the following raw materials: 70 kg of bauxite with a particle size of 8-0 mm, 14 kg of silicon carbide with a particle size of 200 mesh, and α- Al 2 o 3 5 kg of fine powder, 4 kg of kyanite with a particle size of 100 mesh, 14 kg of brown corundum with a particle size of 180 mesh, 4 kg of sodium tripolyphosphate, and 9 kg of silica sol.

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Abstract

The invention discloses a high-aluminum silicon carbide casting material combined with a silica sol. The high-aluminum silicon carbide casting material is prepared from the following raw materials in parts by weight: 60-80 parts of bauxite with particle size of 8-0mm, 10-15 parts of silicon carbide with particle size of 180-320 meshes, 2-7 parts of alpha-Al2O3 micropowder with particle size less than 0.5mu m, 2-5 parts of kyanite with particle size of 80-120 meshes, 10-15 parts of brown corundum with particle size of 160-200 meshes, 2-5 parts of sodium tripolyphosphate and 5-10 parts of silica sol. The high-aluminum silicon carbide casting material combined with a silica sol has the beneficial effects that: the chemical activity of the silica sol is large; the casting material is easy to sinter; after middle-temperature sintering, the strength of the casting material is not reduced; the property of the casting material is greatly improved at the temperature of 1500 DEG C; the thermal shock stability of the casting material is good; and water cooling can be carried out over forty times at the temperature of 1100 DEG C.

Description

technical field [0001] The invention relates to a high-aluminum silicon carbide casting material combined with silica sol. Background technique [0002] The binder used in general refractory castables is cement. Although it has high strength at room temperature and is easy to construct, the strength decreases a lot after medium-temperature firing, and the presence of calcium ions at high temperatures seriously affects the high-temperature performance of castables. Contents of the invention [0003] The technical problem to be solved by the present invention is that the binder used in the refractory castable is cement, and the strength decreases a lot after medium-temperature firing, and a high-aluminum silicon carbide castable is provided. [0004] The technical solution of the present invention is: a high-alumina silicon carbide castable combined with silica sol, which is made of the following raw materials in parts by weight: [0005] Bauxite with a particle size of 8-0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
Inventor 王书明张松善钱长见董寿勇
Owner 郑州京华耐火材料实业有限公司
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