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Method for preparing calcium carbide

A calcium carbide and quicklime technology, applied in the chemical industry, can solve the problems of high energy consumption, high smelting temperature, and high production cost

Inactive Publication Date: 2014-04-09
SHENWU ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the current smelting temperature of the calcium carbide process is relatively high, and the energy consumption is extremely high, which in turn leads to high production costs.

Method used

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  • Method for preparing calcium carbide

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Embodiment

[0045] Using semi-coke with a fixed carbon content of 82.86% as the carbon-based raw material and quicklime with a calcium oxide content of 92% as the calcium-based raw material, the semi-coke is first dried to obtain a semi-coke with a moisture content of less than 5%, and then The dried semi-coke and quicklime are respectively pulverized to less than 2 mm, and then pulverized to 10 microns; the obtained semi-coke particles and quicklime particles are mixed according to a mass ratio of 1:1.8 to obtain a mixed material; the obtained The mixed material is molded to obtain a molding material with a particle size of 32×25×18mm; the obtained molding material is processed in an electric arc furnace at 1680 degrees Celsius for 12 minutes to obtain molten calcium carbide, which passes through the bottom of the furnace in liquid form Discharge, cool and pulverize to obtain calcium carbide products.

[0046] According to the method for preparing calcium carbide in the above embodiment,...

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Abstract

The invention discloses a method for preparing calcium carbide, which comprises the following steps: respectively crushing a carbon-base raw material and a calcium-base raw material to obtain carbon-base particles and calcium-base particles of which the average particle sizes are not greater than 50 micrometers; mixing the carbon-base particles and calcium-base particles to obtain a mixture; forming the mixture to obtain a massive furnace raw material; and smelting the massive furnace raw material in an arc furnace to obtain the calcium carbide. Since the raw materials are prepared into the ultrafine powders and then mixed and formed, the method disclosed by the embodiment of the invention can effectively lower the smelting temperature and energy consumption of the calcium carbide.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular, the invention relates to a method for preparing calcium carbide. Background technique [0002] With the development of modern industry, the calcium carbide industry is closely related to the organic synthesis industry, especially the polyvinyl chloride industry. More than 70% of PVC (polyvinyl chloride) production in my country comes from calcium carbide acetylene. The demand for acetylene is relatively large, but at the same time, calcium carbide The quality requirements are constantly increasing. Therefore, improving the quality of calcium carbide and reducing production energy consumption and cost can improve market competitiveness. [0003] The current method of producing calcium carbide is usually produced by reacting quicklime and carbon materials in an electric furnace, and the reaction temperature is as high as 2000 degrees Celsius. Therefore, the smelting temperature of t...

Claims

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Application Information

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IPC IPC(8): C01B31/32C01B32/942
CPCY02P20/10
Inventor 吴道洪张佼阳丁力
Owner SHENWU ENVIRONMENTAL TECH CO LTD
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