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Smelting technique of brown corundum

A brown corundum and process technology, applied in the field of brown corundum smelting technology, can solve problems such as increasing the cost of raw materials, and achieve the effects of reducing smelting costs, reducing smelting power consumption and saving electricity bills

Inactive Publication Date: 2012-12-12
王洪仁
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thirdly, boiled bauxite must be used, which increases the cost of raw materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The smelting process of brown corundum of the present invention: it comprises the following steps:

[0015] The first step is to put the pulverized raw bauxite that meets the particle size requirements into a rotary kiln or a shaft kiln, and roast it to 1200°C with the heat provided by the gas generated by the generator;

[0016] In the second step, the calcined bauxite material is sent into the insulation material tank, and the carbon material and iron filings are added in proportion and then transferred into the insulation material bin;

[0017] The third step is to use the feeder to send the materials in the heat preservation bin in the second step into the electric furnace to continue heating and melting. After the reaction is complete, it is inspected, cooled and classified to obtain the finished product

Embodiment 2

[0019] The smelting process of brown corundum of the present invention, it comprises the following steps:

[0020] The first step is to mix the raw bauxite, carbon materials and iron scraps crushed to a fine particle size of 5mm in proportion, and roll them into balls with a diameter of 30-50mm, and then put them into a rotary kiln or a shaft kiln. The gas generated by the furnace provides heat to roast it to 1200°C;

[0021] In the second step, the roasted material is sent into the insulation material barrel and transferred into the insulation material bin;

[0022] The third step is to use the feeder to send the materials in the heat preservation silo in the second step into the electric furnace to continue heating and melting. After the reaction is complete, it is inspected, cooled and classified to obtain the finished product.

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Abstract

The invention discloses a smelting technique of brown corundum, which comprises the following steps: 1. adding pulverized raw alumina, which satisfies the particle size requirement, into a rotary kiln or shaft kiln, and roasting to 1200 DEG C by using heat from coal gas generated by a generating furnace; 2. sending the roasted alumina material into a thermal insulation charging basket, proportionally adding a carbon material and iron chips, and transferring into a thermal insulation storage bin; and 3. sending the material in the thermal insulation storage bin in the step 2 into an electric furnace by using a feeder, continuing heating for smelting until the reaction is complete, inspecting, cooling and grading to obtain the finished product. The smelting can also be carried out after pulverizing, mixing, granulating and roasting the three raw materials. The invention can lower the power consumption for smelting and enhance the safety of the smelting technique. The smelting technique does not need to use cured alumina, but only uses raw alumina, thereby greatly lowering the raw material cost; and the material is roasted in the rotary kiln or shaft kiln, and added into the electric furnace for smelting while the material is hot, thereby utilizing the waste heat of roasting and saving the electric power.

Description

technical field [0001] The invention relates to brown corundum, in particular to a brown corundum smelting process. Background technique [0002] Brown corundum is a brown artificial corundum obtained by melting and reducing three raw materials of boiled bauxite, carbon material and iron filings in an electric furnace. The main chemical composition is Al 2 o 3 . It can be used to make abrasive tools and high-grade refractory materials, etc. There are generally three methods of smelting brown corundum: exile method, pouring method and fixation method. The exile method is continuous production with a high degree of automation, but it has a large investment and complex structure and is suitable for high-power smelting; the fixed method is intermittent production and has a low degree of mechanization, but the investment is small, the equipment is simple, and the process is convenient. The main method of smelting. The dumping method commonly used at present is also continuou...

Claims

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Application Information

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IPC IPC(8): C01F7/02
CPCY02P20/129
Inventor 王洪仁
Owner 王洪仁
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