Production method of brown fused alumina

A production method and technology of Brown Gang, applied in the direction of process efficiency improvement, sustainable manufacturing/processing, climate sustainability, etc., can solve problems such as cost increase and production complexity, reduce the use of electric energy, and solve industrial waste. Effect

Active Publication Date: 2021-01-22
茌平浩鑫实业有限公司 +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Increased complexity and cost to production

Method used

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  • Production method of brown fused alumina

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Embodiment 1

[0054]Example 1. Take 1000kg of aluminum slag ash from refined aluminum, and its chemical composition is: Al2O3: 60%, AlN: 5%, Al: 18%, MgCl2: 4%, NaCl: 4%, SiO2:7%.TiO2:1%, Fe2O3: 0.5%. Place it in an electric arc furnace, heat it up, and when it reaches 800°C, start blowing oxygen and turn on the exhaust dust removal equipment. When the materials are all melted, stop blowing oxygen and lower the ventilation equipment, add 411kg aluminum slag ash, and add 10kg iron filings. Perform arc heating and melting. After it is completely melted, the air is increased to remove dust and oxygen for refining for 15 minutes, the temperature reaches 2200 ℃, and the material is discharged after standing for 2 minutes. After cooling to room temperature, it is crushed and processed into different granules. Obtained ferrosilicon-titanium alloy base material: 40kg, dust removal powder 90kg, corundum material 1320kg, the product properties are as follows: Al2O3: 98.5%, SiO2: 0.3%, particle density 3.78...

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Abstract

The invention belongs to the technical field of corundum processing and application, and relates to brown fused alumina, in particular to a production method of brown fused alumina. The method comprises the following effective steps: firstly, the dividing aluminum slag ash, as a raw material, into two batches, adding scrap iron into the second batch, and adding the first batch of aluminum slag ashraw materials into an electric furnace, and heating and melting the components in an oxidizing atmosphere; after melting is completed, adding the second batch of materials, and carrying out heating melting, gasification and reaction under the reducing atmosphere; and after the reaction is completed, carrying out oxidation refining on the obtained blank, and finally discharging to obtain the brownfused alumina. According to the production method of the brown fused alumina provided by the invention, the existing production method is effectively improved, so that industrial wastes such as aluminum slag ash are solved, the use of electric energy is reduced, and the purposes of energy conservation and environmental protection are achieved.

Description

Technical field[0001]The invention belongs to the technical field of corundum processing and application, and relates to brown corundum, in particular to a production method of brown corundum.Background technique[0002]Corundum is a man-made material made from bauxite as the main raw material in a mining furnace. It can be used as abrasive and refractory material. The white corundum with higher purity is called white corundum, and the brown corundum with a small amount of impurities is called brown corundum. At present, the smelting of brown corundum uses special grade bauxite clinker as the main raw material, adding a small amount of iron and carbon, adding it to the electric furnace, and heating until the raw material is melted, and a series of reactions are completed:[0003]TiO2+2C+Fe=Ti-Fe+2CO (1)[0004]SiO2+Fe+2C=Si-Fe+2CO (2)[0005]Fe2O3+3C=2Fe+3CO (3)[0006]R2O+C=2R+CO (4)[0007]Through the above-mentioned reaction, the impurities are reacted to produce gas (alkali metal), which is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/626C04B35/653
CPCC04B35/10C04B35/62605C04B35/62204C04B35/653Y02P20/10
Inventor 宋保峰田守信宋保国刘传省
Owner 茌平浩鑫实业有限公司
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