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Micron-scale low hydroxyl OH<-> crystal powder production process method

A production process and technology of crystal powder, applied in the direction of silicon dioxide, silicon oxide, etc., can solve the problems of high impurity content of high-purity crystal powder, inability to use crystal ceramics and making special high-temperature resistant devices, etc., to achieve low impurity content and particle size. Uniform, simple process effect

Active Publication Date: 2013-09-25
JIANGSU SHENGDA QUARTZ PROD CO LTD
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AI Technical Summary

Problems solved by technology

Micron level low hydroxyl OH - Crystal powder is one of the key materials widely used in domestic high-end technical fields, and it is also a key application material for crystal ceramics and special high-temperature-resistant devices. At present, the traditional domestic production process of high-purity crystal powder is through baking, roller Crushing, sieving, acid immersion, medium magnetic, chemical flotation, high magnetic and other technological processes are produced, so the final high-purity crystal powder has a high impurity content, and the mesh number is generally between 80-120 mesh, which cannot be used in crystal Ceramics and making special high temperature resistant devices

Method used

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Embodiment Construction

[0025] A micron-sized low hydroxyl OH - The production process method of crystal powder, implementation steps are as follows:

[0026] 1) Select high-purity crystal raw materials, pickling, baking, crushing, screening, acid immersion, neutral magnetism, flotation impurity removal, high magnetism, drying and other processing procedures in sequence;

[0027] 2) The high-purity crystal raw material is crushed with a manganese steel double-roll machine, and the crushed particles are 100-300 mesh;

[0028] 3) 300-mesh crystal powder is pulverized with a quartz double-roller, and the pulverized particles are 500-800 mesh;

[0029] 4) Perform 20-50 kHz high-frequency primary cavitation vibration with 500-800 mesh crystal powder with an ultrasonic vibrator to obtain 1000-2500 mesh;

[0030] 5) Pickling 1000-2500 mesh crystal powder with sulfuric acid and hydrofluoric acid for 48 hours;

[0031] 6) Baking the 48-hour acid-washed crystal powder in a high-temperature kiln at 850°C;

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Abstract

The present invention discloses a micron-scale low hydroxyl OH<-> crystal powder production process method, which comprises the following steps: (1) selecting a high purity crystal raw material and treat; (2) crushing the high purity crystal raw material; (3) carrying out secondary crushing on the crushed crystal powder; (4) carrying out cavitation vibration on the obtained crystal powder by using an ultrasonic vibration machine; (5) carrying out acid washing 4 on the obtained crystal powder; (6) carrying out high temperature baking on the obtained crystal powder; (7) carrying out secondary acoustic cavitation on the baked crystal powder; (8) carrying out magnetic separation impurity removal on the obtained crystal powder; and (9) carrying out high temperature hydroxyl removal and impurity removal purification on the impurity-removed crystal powder. The method is simple. In addition, low hydroxyl OH<-> content is less than or equal to 5 pm, and crystal powder purity is more than or equal to 99.99999%.

Description

technical field [0001] The invention relates to the field of inorganic non-metal processing, in particular to a micron-scale low hydroxyl OH - The production process of crystal powder. Background technique [0002] High-purity crystal powder is the key raw material for making crystal tubes, crystal lamps, etc. Hydroxyl OH in crystal raw materials - The level directly affects the purity of the product. Micron level low hydroxyl OH - Crystal powder is one of the key materials widely used in domestic high-end technical fields, and it is also a key application material for crystal ceramics and special high-temperature-resistant devices. At present, the traditional domestic production process of high-purity crystal powder is through baking, roller Crushing, sieving, acid immersion, medium magnetic, chemical flotation, high magnetic and other technological processes are produced, so the final high-purity crystal powder has a high impurity content, and the mesh number is genera...

Claims

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Application Information

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IPC IPC(8): C01B33/12
Inventor 段玉伟
Owner JIANGSU SHENGDA QUARTZ PROD CO LTD
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