Method for preparing calcium carbide

A calcium carbide and quicklime technology, applied in the direction of carbide, calcium carbide, etc., can solve the problems of high reaction temperature, backward production technology and long reaction time.
CN103708455AActive Publication Date: 2014-04-09SHENWU ENVIRONMENTAL TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHENWU ENVIRONMENTAL TECH CO LTD
Publication Date
2014-04-09

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Abstract

The invention discloses a method for preparing calcium carbide, which comprises the following steps: providing carbon-base particles and calcium-base particles, wherein the average particle size of the carbon-base particles and calcium-base particles is not greater than 5 millimeters, and the water content is lower than 5%; mixing the carbon-base particles and calcium-base particles to obtain a mixture; pyrolyzing the mixture to obtain high-quality tar, high heating value gas and a pyrolytic solid product, wherein the pyrolytic solid product contains quicklime and one of coke, semicoke and carbon black; and feeding the pyrolytic solid product into a gas smelting furnace at the temperature of not lower than 450 DEG C to perform smelting in the gas smelting furnace, thereby obtaining the calcium carbide. Thus, the method can further enhance the heat utilization ratio and production efficiency, lower the production cost and reduce the energy consumption and pollution.
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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] Calcium carbide (CaC 2 ), known as the mother of organic synthesis before the middle of the last century. At present, it is mainly used in the production of vinyl chloride, vinyl acetate and acrylic series products. More than 70% of PVC (polyvinyl chloride) production in China comes from calcium carbide acetylene. Calcium carbide plays a very important role in my country's economic development, and its output has been increasing in the past ten years, reaching 18.69 million tons in 2012.

[0003] Although the calcium carbide industry has a history of more than 100 years, its production technology is still relatively backward. At present, the fixed bed (moving bed)-block raw material-arc heating method is still used. This process has a high reaction temperature (2000-2200 degrees Celsiu...

Claims

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