Method for preparing calcium carbide

A technology of calcium carbide and quicklime, applied in the direction of carbide, calcium carbide, etc., can solve the problems of high pollution and high energy consumption of calcium carbide production

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 production of calcium carbide is in a situation of high energy consumption and high pollution

Method used

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  • Method for preparing calcium carbide

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preparation example Construction

[0035] The method for preparing calcium carbide according to the embodiment of the present invention prepares and pulverizes carbon-based raw materials and calcium-based raw materials, for example, pulverizes to an ultrafine powder with an average particle size of not more than 20 microns, and significantly increases the carbon-based raw materials and calcium-based raw materials after mixing. The contact area can significantly reduce the reaction temperature and speed up the reaction rate. Compared with the traditional method for preparing calcium carbide, the method significantly reduces energy consumption. According to a specific embodiment of the present invention, preferably, carbon-based raw materials and calcium-based raw materials can be crushed to an average particle size of less than 10 microns, and then the smelting treatment can be carried out at 1600-1800 degrees Celsius for 10-20 minutes to prepare calcium carbide. According to a specific embodiment of the present...

Embodiment

[0043] 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 crushed to less than 2 mm, and then crushed 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 processed in a gas melting furnace at 1680 degrees Celsius for 10 to 20 minutes to obtain molten calcium carbide, which is discharged in liquid form through the bottom of the furnace, cooled and crushed to obtain calcium carbide products.

[0044] According to the method for preparing calcium carbide in the above embodiment, the content of calcium carbide in the prepared calcium carbide can reach 78.57%, the gas generation can reach ...

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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; and smelting the mixture in a gas smelting furnace to obtain the calcium carbide. Since the raw materials are prepared into the ultrafine powders and then mixed and smelted, 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] For a long time, the production of calcium carbide has been made by reacting lumps of quicklime and carbon materials in an electric arc furnace, and the reaction temperature is 2000-2200 degrees Celsius. Therefore, the production of calcium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/32C01B32/942
Inventor 吴道洪张佼阳丁力
Owner SHENWU ENVIRONMENTAL TECH CO LTD
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