Casting-molded square crucible and preparation method therefor

A casting molding and crucible technology, applied in the field of refractory products, can solve the problems of poor corrosion resistance, easy cracks, easy peeling, etc., and achieve the effects of strong thermal shock resistance, increased strength, and good resistance to rapid cooling and rapid heating

Inactive Publication Date: 2019-12-20
山东铭特陶瓷材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the technical problems of existing corundum crucibles such as poor thermal shock resistance, poor corrosion resistance, easy cracks, easy peeling, and easy to pollute products, the invention provides a casting-molded square crucible and a preparation method thereof. The square crucible of the invention has High temperature, high strength, anti-stripping, anti-erosion, good thermal shock resistance

Method used

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  • Casting-molded square crucible and preparation method therefor

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Embodiment 1

[0029] A casting-molded square crucible, the square crucible comprising the following raw materials in parts by weight: 15 parts of alumina powder, 10 parts of corundum powder, 18 parts of 3mm-1mm plate-shaped corundum, 13 parts of 20-mesh corundum particles, and 36-mesh corundum 10 parts of granules, 8 parts of 80-mesh corundum granules, 15 parts of 180-mesh fused mullite, 6 parts of 400-mesh quartz fine powder, and 5 parts of sodium tripolyphosphate.

[0030] The preparation method of this square crucible comprises the following steps:

[0031] 1) Iron removal: all kinds of raw materials are magnetically separated by a powerful magnetic separator to remove iron;

[0032] 2) Stirring: Weigh various raw materials according to the ratio, mix the raw materials with 8 parts of water, use a vacuum mixer to evacuate while stirring, and the stirring time is 30 minutes to form a slurry;

[0033] 3) Pouring: vibratingly pour the stirred mud into the plaster model of the square crucib...

Embodiment 2

[0038] A casting-formed square crucible, the square crucible comprising the following raw materials in parts by weight: 20 parts of alumina powder, 15 parts of corundum powder, 18 parts of 3mm-1mm plate-shaped corundum, 12 parts of 20-mesh corundum particles, and 36-mesh corundum 8 parts of granules, 7 parts of 80 mesh corundum particles, 14 parts of 180 mesh fused mullite, 10 parts of 400 mesh quartz fine powder, 3 parts of kaolin powder, and 9 parts of sodium tripolyphosphate.

[0039] The preparation method of this square crucible comprises the following steps:

[0040] 1) Iron removal: all kinds of raw materials are magnetically separated by a powerful magnetic separator to remove iron;

[0041] 2) Stirring: Weigh various raw materials according to the ratio, mix the raw materials with 7 parts of water, use a vacuum mixer to evacuate while stirring, and the stirring time is 25 minutes to form a slurry;

[0042] 3) Pouring: vibratingly pour the stirred mud into the plaster...

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Abstract

The invention relates to the technical field of refractory products and particularly relates to a casting-molded square crucible and a preparation method therefor. The square crucible is prepared fromthe following raw materials in parts by weight: 10-30 parts of powdered alumina, 5-20 parts of corundum powder, 15-20 parts of 3mm-1mm slabby corundum, 10-20 parts of corundum granules with the particle size of 20 meshes, 5-20 parts of corundum granules with the particle size of 36 meshes, 10-10 parts of corundum granules with the particle size of 80 meshes, 10-20 parts of electrofused mullite with the particle size of 180 meshes and 5-10 parts of dispersant. The method comprises the steps of iron removal, stirring, casting, demolding, baking and firing. The square crucible disclosed by the invention has the characteristics of high-temperature resistance, high strength, stripping resistance, erosion resistance and good thermal shock resistance; and the preparation method has the characteristics that the operation is simple, a large-sized molding press is not required, and the investment is small.

Description

technical field [0001] The invention relates to the technical field of refractory products, in particular to a casting-formed square crucible and a preparation method thereof. Background technique [0002] The crucible is an important part of a chemical instrument. It is a container for melting and refining metal liquids and solid-liquid heating and reaction. It is the basis for ensuring the smooth progress of chemical reactions. Corundum is more resistant to high temperatures than glass vessels, so crucibles are often used as containers when solids are to be heated over high fire. According to the different production raw materials, the crucible can be summarized into three types, one is crystalline natural graphite, the other is plastic refractory clay, and the third is calcined hard kaolin skeleton clinker. In recent years, high-temperature-resistant synthetic materials have also begun to be used, such as silicon carbide, alumina corundum, and ferrosilicon, as the skelet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/101C04B35/622B28B1/08
CPCB28B1/08C04B35/101C04B35/622C04B2235/3463C04B2235/349C04B2235/5427C04B2235/5436C04B2235/656C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607C04B2235/9669
Inventor 蔡伟殷若光孙华云李明京蔡衍坤殷佩如
Owner 山东铭特陶瓷材料有限公司
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