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

Active Publication Date: 2010-06-23
西峡县正弘单晶刚玉有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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 powder and break off within three months, which is harmful to human health, pollutes the atmosphere, and discharges a large amount of deep sediment into the water, polluting downstream water sources The second is that after the single crystal corundum produced by the original production method is made into a grinding wheel, there are iron spots and shrinkage phenomena. The result of shrinkage is that abnormal cracks and deformation appear on the grinding wheel, which seriously affects the working ability and working effect of the grinding wheel; in addition, The original production method consumes a lot of energy, and the production of single crystal corundum requires 6,000 degrees of electricity per ton

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  • Production method for blue SA (single alundum)
  • Production method for blue SA (single alundum)
  • Production method for blue SA (single alundum)

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A kind of production method of blue single crystal corundum, comprises the steps:

[0027] a. Mixing: Mix 1 ton of alumina, 2kg of anatase titanium dioxide, 6kg of titanite powder, and 8kg of aluminum fluoride;

[0028] b. Melting: Put the mixed raw materials into the electric arc furnace, heat to 1800℃~2400℃, and continue heating for 25~32 hours;

[0029] c. Cooling and solidification: After smelting, let stand at room temperature for 3 to 6 days to fully solidify;

[0030] d. Open the furnace and break: open the furnace, first crush the corundum into small pieces with a hammer, and then crush it with an impact breaker;

[0031] e. Magnetic separation and impurity removal: use a magnetic separator to select the magnetic impurities in the corundum sand;

[0032] f. Screening: use a sieve of appropriate mesh to classify the broken particles from magnetic selection;

[0033] g. Secondary magnetic separation to remove impurities: use a magnetic separator to obtain blue ...

Embodiment 2

[0035] A kind of production method of blue single crystal corundum, comprises the steps:

[0036] a. Mixing: Mix 1 ton of alumina, 4kg of anatase titanium dioxide, 10kg of titanite powder, and 12kg of aluminum fluoride;

[0037] b. Melting: Put the mixed raw materials into the electric arc furnace, heat to 1800℃~2400℃, and continue heating for 25~32 hours;

[0038] c. Cooling and solidification: After smelting, let stand at room temperature for 3 to 6 days to fully solidify;

[0039] d. Open the furnace and break: open the furnace, first crush the corundum into small pieces with a hammer, and then crush it with an impact breaker;

[0040] e. Magnetic separation and impurity removal: use a magnetic separator to select the magnetic impurities in the corundum sand;

[0041] f. Screening: use a sieve of appropriate mesh to classify the broken particles from magnetic selection;

[0042] g. Secondary magnetic separation to remove impurities: use a magnetic separator to obtain blu...

Embodiment 3

[0044] A kind of production method of blue single crystal corundum, comprises the steps:

[0045] a. Mixing: Mix 1 ton of alumina, 3kg of anatase titanium dioxide, 8kg of titanite powder, and 10kg of aluminum fluoride;

[0046] b. Melting: Put the mixed raw materials into the electric arc furnace, heat to 1800℃~2400℃, and continue heating for 25~32 hours;

[0047] c. Cooling and solidification: After smelting, let stand at room temperature for 3 to 6 days to fully solidify;

[0048] d. Open the furnace and break: open the furnace, first crush the corundum into small pieces with a hammer, and then crush it with an impact breaker;

[0049] e. Magnetic separation and impurity removal: use a magnetic separator to select the magnetic impurities in the corundum sand;

[0050] f. Screening: use a sieve of appropriate mesh to classify the broken particles from magnetic selection;

[0051] g. Secondary magnetic separation to remove impurities: use a magnetic separator to obtain blue...

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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.

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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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/20
Inventor 王虎山
Owner 西峡县正弘单晶刚玉有限公司
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