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Light mullite-aluminum oxide hollow sphere-aluminum titanate sagger casting molding process

A technology of alumina hollow spheres and lightweight mullite, which is applied in the field of refractory materials, can solve problems such as instability and short service life, and achieve the effects of increasing service life, improving thermal shock resistance, and improving product performance

Active Publication Date: 2021-07-23
浙江吉昌新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shortcoming is the problem of short service life and instability. Taking phosphor powder sintering as an example, the current service life is between 10 and 30 times

Method used

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  • Light mullite-aluminum oxide hollow sphere-aluminum titanate sagger casting molding process
  • Light mullite-aluminum oxide hollow sphere-aluminum titanate sagger casting molding process
  • Light mullite-aluminum oxide hollow sphere-aluminum titanate sagger casting molding process

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Embodiment 1

[0028] The invention provides a lightweight mullite-alumina hollow sphere-aluminum titanate sagger pouring molding process. In parts by weight, 2 parts of Suzhou No. 2 mud, 6 parts of silicon micropowder, and α-alumina powder are weighed. 4 parts, 4 parts of α-alumina micropowder, 10 parts of calcium aluminate cement, 11 parts of fused mullite powder, 11 parts of aluminum titanate powder, 18 parts of alumina hollow spheres with a particle size of 0.2-1mm, with a particle size of 4 parts of alumina hollow spheres of 1-3 mm, 10 parts of light mullite particles with a particle size of not more than 1 mm, 20 parts of light mullite particles with a particle size of 1-3 mm, 0.3 parts of sodium tripolyphosphate, put Put it into the mixer and mix it well, add 16 parts of water, and form a viscoplastic slurry with a certain fluidity after full stirring, pour the slurry into the mold, and put it on a vibration table or use a plug-in vibrator or a flat plate The vibrator, through vibrati...

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Abstract

The invention discloses a light mullite-alumina hollow sphere-aluminum titanate sagger casting molding process, belonging to the field of refractory materials. The light mullite-alumina hollow sphere-aluminum titanate sagger casting molding process comprises the following steps: weighing 2-6 parts by weight of Suzhou mud No. 2, 4-6 parts by weight of silica powder, 4-8 parts by weight of alpha-alumina powder, 4-6 parts by weight of alpha-alumina micro powder, 6-10 parts by weight of calcium aluminate cement, 11-21 parts by weight of electric smelting mullite powder, and 3-11 parts by weight of aluminum titanate powder. The preparation method comprises the following steps: putting 10-20 parts of aluminum oxide hollow spheres with particle sizes in a range of 0.2-1 mm, 4-6 parts of aluminum oxide hollow spheres with particle sizes in a range 1-3 mm, 10-20 parts of light mullite particles with particle sizes of not more than 1 mm, 10-20 parts of light mullite particles with particle sizes of 1-3 mm and 0.2-0.3 part of sodium tripolyphosphate into a stirrer, conducting full mixing, adding 12-16 parts of water, performing full stirring to form slurry with certain fluidity and viscoplasticity, pouring the slurry into a mold for casting molding, performing demolding to take out a product, and putting the product into a drying kiln for drying. The prepared sagger is light in weight and long in service life, the investment cost of a production line can be greatly reduced through a casting technology, and cost performance is higher.

Description

technical field [0001] The invention relates to the field of refractory materials, specifically a lightweight mullite-alumina hollow sphere-aluminum titanate sagger casting process. Background technique [0002] At present, high-temperature saggers suitable for temperatures above 1500°C are all made of fused mullite and corundum. Powder, clay powder, white corundum, quartz and mullite are used as raw materials, mixed and molded and then fired at high temperature. Compared with the pre-synthesized quartz, mullite, and re-mixed saggers on the market, the finished product phase is more uniform, the color and thermal shock stability are better, and the thermal expansion coefficient of the generated phase is small, so it has extremely high thermal shock Stability, and the addition of quartz can improve the thermal shock performance, and can maintain the crack resistance, uniformity and quality stability of the product during mass production, and is suitable for environments with...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66
CPCC04B35/66C04B2235/3463C04B2235/349C04B2235/9607C04B2235/77C04B2235/3234C04B2235/3217C04B2235/447C04B2235/3222
Inventor 王家邦
Owner 浙江吉昌新材料有限公司
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