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Process for preparing alpha-phase alumina powder by sand mill unit

A phase alumina, sand mill technology, applied in the direction of alumina/hydroxide, inorganic chemistry, aluminum compounds, etc., can solve the problem of clogging the outlet screen of the horizontal rod sand mill, and reduce labor costs , Improve product quality and reduce production costs

Pending Publication Date: 2022-06-21
欣和智达能源科技发展(浙江)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a process for preparing α-phase alumina powder by a sand mill unit, so as to solve the problem of slurry blocking the outlet screen of the horizontal rod sand mill, improve the grinding efficiency, reduce equipment and grinding The damage of the medium, and for the production of high-quality ultra-fine powder

Method used

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  • Process for preparing alpha-phase alumina powder by sand mill unit
  • Process for preparing alpha-phase alumina powder by sand mill unit
  • Process for preparing alpha-phase alumina powder by sand mill unit

Examples

Experimental program
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Effect test

Embodiment 1

[0031] This embodiment provides a process for preparing α-phase alumina powder by a sand mill. The schematic diagram of the process flow is shown in figure 1 , which includes the following steps:

[0032] (1) Pre-dispersion

[0033] Alpha-phase alumina powder with a mass of 50 kg and an average particle size of 10-100 μm, deionized water and dispersant ammonium citrate are fully dispersed in a stirring tank in a ratio of 1:9:0.003 by mass.

[0034] (2) Coarse grinding

[0035] The dispersed slurry in the stirring tank flows into the running dispersion tank, and then the slurry is pumped into the basket sand mill through the diaphragm pump for circular grinding. The specific process parameters of the cyclic grinding are: the grinding medium is alumina balls of φ1-3mm; the rotating speed of the basket sand mill is 800-1400rpm; the cycle grinding time is 1-4h; The material is passed through the magnetic filtration device to achieve the preliminary Fe removal effect; the partic...

Embodiment 2

[0041] This embodiment is basically the same as Embodiment 1, and the special features are:

[0042] In this embodiment, step (1) is:

[0043] (1) Pre-dispersion

[0044] Alpha-phase alumina powder with a mass of 50 kg and an average particle size of 10-100 μm, deionized water and dispersant ammonium citrate were fully dispersed in a stirred tank in a mass ratio of 1:4:0.005.

Embodiment 3

[0046] This embodiment is basically the same as Embodiment 1, and the special features are:

[0047] In this embodiment, step (1) is:

[0048] (1) Pre-dispersion

[0049] Alpha-phase alumina powder with a mass of 50 kg and an average particle size of 10-100 μm, deionized water and dispersant ammonium citrate were fully dispersed in a stirring tank in a mass ratio of 1:2.3:0.007.

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Abstract

The invention discloses a process for preparing alpha-phase aluminum oxide powder by a sand mill unit, which comprises the following steps: S1, proportionally preparing an alpha-phase aluminum oxide powder raw material, water and a dispersing agent into slurry in a stirring kettle, and stirring; s2, pumping the slurry into a basket type sand mill with a magnetic filtering device by using a diaphragm pump, and grinding until the average particle size of the aluminum oxide powder in the slurry is 2-5 microns; s3, pumping the slurry ground in the step S2 into a horizontal rod type sand mill with a magnetic filtering device by using a diaphragm pump, and grinding the aluminum oxide powder in the slurry to a target particle size; and S4, drying the slurry which is ground in the step S3 and reaches the target particle size to obtain the alpha-phase alumina powder. According to the process for preparing the alpha-phase alumina powder through the sand mill unit, the grinding efficiency is improved, the alumina product quality is improved, and the problem that a screen of a sand mill is blocked is solved.

Description

technical field [0001] The invention relates to the technical field of alumina powder preparation, in particular to a process for preparing alpha-phase alumina powder by a sand mill. Background technique [0002] As the most widely used ceramic powder, high-quality ultra-fine alumina has excellent high temperature resistance, corrosion resistance, wear resistance and other properties. It is unique in the fields of sapphire, lithium battery separator coating, polishing powder, and grinding media. However, there is still a big gap between our domestic high-quality alumina and foreign countries, mainly because the purity, particle size, particle size distribution and dispersion of domestic products cannot meet the market demand. Therefore, the research and development of high-quality ultra-fine alumina powder preparation technology is very urgent. [0003] At present, ball milling and basket sanding are often used to pulverize alumina powder in China, which has problems such a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C21/00B02C23/14B02C23/06C01F7/02
CPCB02C21/00B02C23/14B02C23/06C01F7/023C01P2004/03C01P2004/61C01P2004/62
Inventor 王永春郑兴华李应龙李斌主燕
Owner 欣和智达能源科技发展(浙江)有限公司