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Preparation method of spheroidic alpha alumina for grinding and polishing

A technology of α-alumina and spherical shape, which is applied in chemical instruments and methods, polishing compositions containing abrasives, aluminum compounds, etc., can solve the problems that the hardness and surface uniformity of α-alumina cannot meet high-performance polishing, etc. Achieve the effect of excellent cutting force and polishing rate, concentrated distribution and high hardness

Active Publication Date: 2022-07-22
中铝山东有限公司
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Problems solved by technology

[0004] The purpose of this application is to provide a method for preparing spherical α-alumina for polishing, and to solve the technical problem that the hardness and surface uniformity of existing α-alumina products cannot meet the technical requirements of high-performance polishing

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  • Preparation method of spheroidic alpha alumina for grinding and polishing

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preparation example Construction

[0027] According to a typical embodiment of the present invention, there is provided a preparation method of spherical alpha alumina for grinding and polishing, comprising the following steps:

[0028] S1. The aluminum-containing compound and the grain-oriented growth aid are mixed and reacted in a liquid phase to obtain a prefabricated product.

[0029] S2. The preform is separated, washed and dried to obtain a precursor.

[0030] S3, mixing and calcining the precursor and the composite mineralizer to obtain the spherical α-alumina for grinding and polishing.

[0031] The preparation method of spherical α-alumina for grinding and polishing provided by the present invention, through the liquid phase reaction, the grain directional growth aid is uniformly coated on the surface of the aluminum-containing compound, mixed with the composite mineralizer and calcined, accompanied by the formation of α-alumina. The transformation of the crystal phase, the crystal is transformed from...

Embodiment 1

[0048] The present embodiment provides a preparation method of spherical α-alumina for grinding and polishing, and the steps are as follows:

[0049] S1, 100g of industrial alumina and 0.1g of magnesium chloride are mixed and reacted in liquid phase to obtain a prefabricated product.

[0050] Wherein: the temperature of the liquid phase reaction is 50 DEG C, the reaction time is 10min, and the heating mode is water bath heating.

[0051] S2. The preform is separated, washed and dried to obtain a precursor.

[0052] Wherein: the washing water is distilled water at 50°C, and the mass ratio of the distilled water to the aluminum-containing compound is 2:1.

[0053] S3, mixing and calcining the precursor and the composite mineralizer to obtain the spherical α-alumina for grinding and polishing.

[0054] Among them: the composite mineralizer includes fluoride and boron compound, the fluoride is aluminum fluoride, and the boride is boric acid;

[0055] The mass ratio of the fluor...

Embodiment 2

[0058] The present embodiment provides a preparation method of spherical α-alumina for grinding and polishing, and the steps are as follows:

[0059] S1. 100g of industrial alumina and 0.5g of magnesium chloride are mixed and reacted in a liquid phase to obtain a prefabricated product.

[0060] Wherein: the temperature of the liquid phase reaction is 80°C, the reaction time is 30min, and the heating mode is water bath heating.

[0061] S2. The preform is separated, washed and dried to obtain a precursor.

[0062] Wherein: the washing water is distilled water at 80°C, and the mass ratio of the distilled water to the aluminum-containing compound is 3:1.

[0063] S3, mixing and calcining the precursor and the composite mineralizer to obtain the spherical α-alumina for grinding and polishing.

[0064] Among them: the composite mineralizer includes fluoride and boron compound, the fluoride is calcium fluoride, and the boron is boric acid;

[0065] The mass ratio of the fluoride ...

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Abstract

The invention particularly relates to a preparation method of spheroidic alpha alumina for grinding and polishing, and belongs to the technical field of inorganic non-metallic materials. The preparation method comprises the following steps: carrying out mixing and liquid phase reaction on an aluminum-containing compound and a grain oriented growth auxiliary agent to obtain a preform; separating, washing and drying the preform to obtain a precursor; and mixing and calcining the precursor and a composite mineralizing agent to obtain the spheroidic alpha alumina for grinding and polishing. According to the preparation method, the alpha aluminum oxide with unique and excellent performance can be obtained, and the alpha aluminum oxide is high in calcination degree, high in hardness and uniform and concentrated in crystal grain distribution, so that the alpha aluminum oxide is effectively suitable for fine polishing of metal or stone, has excellent cutting force and polishing rate for grinding and polishing products, and is particularly suitable for medium-end and high-end fine polishing.

Description

technical field [0001] The invention belongs to the technical field of inorganic non-metallic materials, and particularly relates to a preparation method of spherical α-alumina for grinding and polishing. Background technique [0002] As a grinding and polishing material, it is one of the important uses of alpha alumina. The global alpha alumina market has a capacity of about 2.4 million tons per year, the ceramic industry accounts for 46%, the refractory market accounts for 36%, and the polishing market accounts for 14%. %, about more than 300,000 tons; with the development of the national economy, China's demand for surface treatment and polishing of stainless steel, copper, aluminum and other metals or stone materials is increasing, which has led to a rapid increase in the market demand for polished alumina. The market demand is 10,000-30,000 tons per year. In the domestic market, Sumitomo, Ammann and other American and Japanese companies have high requirements on the de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/021C09G1/02
CPCC01F7/021C09G1/02C01P2004/32C01P2004/61
Inventor 齐波王伟王少武李智勇刘光升
Owner 中铝山东有限公司
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