Production method for blue SA (single alundum)

A single crystal corundum, production method technology, applied in single crystal growth, single crystal growth, crystal growth and other directions, can solve the problems of iron spot, harmful to human health, deformation and so on
CN101748486AActive Publication Date: 2010-06-23西峡县正弘单晶刚玉有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
西峡县正弘单晶刚玉有限公司
Publication Date
2010-06-23

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Abstract

The invention discloses a production method for blue SA (single alundum). The production method includes the following steps of: a. material mixing; b. smelting; c. temperature reduction and solidification; d. blowing-in and crushing, e. magnetic separation and impurities removing; f. screening; g. secondary magnetic separation and impurities removing. As the blue SA which is produced by the production method does not use iron ores, no smoke and smell are caused in the smelting process, no hydrogen sulphide gas is generated during the product processing, no pollution is caused to the atmosphere, no sewage is discharged, and no pollution is caused to the environment in the whole production process. The number of monocrystals produced during the later period is up to 95%, which is 50% higher than the original number of the monocrystals (the monocrystals of the original SA accounts for 65% or so); the intensity exceeds 26N; and the toughness is up to 90.5%, which is 25% higher than that of the original SA.
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Description

technical field

[0001] The invention belongs to the technical field of single crystal corundum production methods, in particular to a production method of blue single crystal corundum. Background technique

[0002] The traditional production method of single crystal corundum is to use bauxite, pyrite and carbonaceous substances as raw materials, mix them and send them to electric arc furnace for smelting, and produce Al at high temperature. 2 o 3 , after cooling the electric furnace, corundum single crystals are precipitated from the melt. But there are big problems in the original production method, the one, can decompose in the refining process in the air, discharge a large amount of sulfur dioxide gas, produce a large amount of hydrogen sulfide gas in the process of hydrolysis, hydrogen sulfide gas is to all kinds of metals ( Copper, zinc) wires, and various types of electrical appliances have an astonishing degree of corrosion. All types of wires will become rust powde...

Claims

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