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Production method of activated aluminum oxide micropowder

A kind of technology of activated alumina and production method, which is applied in the field of refractory materials, can solve the problems of large investment in shaft kiln construction and low production capacity, and achieve the effect of less brick moving links, low brick broken rate and obvious effect

Inactive Publication Date: 2018-08-17
洛阳利尔功能材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the existing production methods of activated alumina micropowder use vertical kilns, rotary kilns or saggars to be sintered in tunnel kilns. Among them, the construction investment of vertical kilns is large, and the production capacity of rotary kilns and saggers in tunnel kilns is low.

Method used

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Embodiment Construction

[0033] The present invention can be explained in more detail by the following examples, and the present invention is not limited to the following examples;

[0034] A kind of production method of activated alumina micropowder according to the present invention, described production method specifically comprises the following steps:

[0035] The first step, premixing of additives and raw materials:

[0036] First, the additive and industrial alumina powder are mixed in a certain proportion and then mixed by a mixer to obtain a premix; the weight ratio of the additive to the industrial alumina powder is (2-4.5): 100, and the additive is dextrin, Any one or any combination of two or more of boric acid and aluminum fluoride; the particle size of the industrial alumina powder is less than 100 mesh; the mixer is a double-helix conical mixer;

[0037] The second step, premix and raw material mixing and grinding:

[0038] Continuing from the previous step, mix the premixed material ...

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Abstract

The invention discloses a production method of activated aluminum oxide micropowder and relates to the field of materials. In the production method, a tunnel kiln sintering method is adopted to produce alpha-aluminum oxide micropowder; a green brick is uniform in drying and small in deformation degree; in addition, green brick movement links are relatively small, the broken brick rate is low, andthe conditions are beneficial to keeping good working condition of a tunnel kiln and also ensuring good calcining quality; and the prepared activated aluminum oxide micropowder can be used for a lighttransmitting aluminum oxide sintered body, a carrier for a phosphor, a single crystal material, a high-grade porcelain, an artificial bone, a semiconductor, an integrated circuit substrate, an audiotape filler, a catalyst and a carrier thereof, an abrasive material, a laser material, a cutting tool and the like and particularly plays an important role in development of microelectronics and material industry. The production method has the advantages of simpleness in operation, obvious effect and the like and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a production method of activated alumina micropowder. Background technique [0002] It is known that activated alumina micropowder is the most widely used micropowder material in unshaped refractory materials. Activated alumina micropowder is made of industrial alumina powder, ground together with a small amount of binder, mixed with water and stirred evenly, and pressed by a hydraulic press. The loose adobe is sent into the tunnel kiln after being dried, and undergoes crystal transformation under high temperature, and after cooling, it is crushed and ground to obtain activated alumina micropowder. [0003] Due to its high melting point, high hardness, high insulation, high thermal conductivity, high strength and corrosion resistance, activated alumina micro powder has become an important industrial raw material. The particle size of alumina micropowder can be controlled in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/626C01F7/02
CPCC01F7/02C01P2004/61C04B35/10C04B35/62605
Inventor 毕长禄李有奇赵继增
Owner 洛阳利尔功能材料有限公司
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