Method for preparing calcium carbide

A technology of calcium carbide and quicklime powder, applied in the chemical industry, can solve the problems of slow reaction rate, large power consumption and high reaction temperature

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

The traditional use of coke or semi-coke as a reducing agent has defects such as slow reaction ra...

Method used

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  • Method for preparing calcium carbide

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preparation example Construction

[0036] According to the method for preparing calcium carbide in the embodiment of the present invention, waste tires are pyrolyzed to obtain high calorific value synthesis gas, tar, iron wire and carbon black products, which can realize clean and efficient utilization of waste tires;

[0037] According to the method for preparing calcium carbide in the embodiment of the present invention, the coke production process is a process with high energy consumption and high pollution, while tire carbon black can partially or completely replace high-priced coke to produce calcium carbide, realize energy saving and emission reduction, and reduce the production cost of calcium carbide ;

[0038] According to the method for preparing calcium carbide according to the embodiment of the present invention, the tire carbon black has a small particle size and a large specific surface area, and can be fully mixed with the calcium-based powder, which is beneficial to the efficient progress of the ...

Embodiment

[0043] The waste tires are crushed to less than 50mm, and the quicklime is crushed by a crusher to obtain quicklime particles with a particle size of less than 3mm; the crushed waste tire particles are input into a non-heat carrier regenerative rotary bed, and the pyrolysis pressure is 550 degrees Celsius at a temperature of 550 degrees Celsius. Carry out pyrolysis reaction at 100Pa for 1 hour to obtain high-temperature oil gas, solid pyrolysis products including iron wire and tire carbon black. After the high-temperature oil gas produced is condensed, separated, and purified in sequence, high-calorific value tar and synthetic gas products can be obtained respectively. , the solid pyrolysis product containing iron wire and tire carbon black is separated and processed by a magnetic separator, and tire carbon black and iron wire can be obtained respectively; the obtained tire carbon black is hot and has a particle size of nanoscale, and then mixed with quicklime particles ( The a...

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Abstract

The invention discloses a method for preparing calcium carbide, which comprises the following steps: pyrolyzing junked tires to obtain high-temperature oil gas, iron wires and tire carbon black; mixing the tire carbon black with a calcium-base raw material 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. The technique can obviously lower the temperature and energy consumption, thereby lowering the production cost 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] The scientific name of calcium carbide is calcium carbide, a colorless crystal, mainly used for the production of acetylene gas. Acetylene gas can produce a variety of chemical products, including vinyl chloride series, vinyl acetate series and acrylic acid series. It was once called "the mother of organic synthesis industry". Calcium carbide production methods include aerobic thermal method and electrothermal method. At present, electrothermal method is mainly used to produce calcium carbide in my country: calcium-based raw materials and carbon-based raw materials undergo high-temperature reactions in electric furnaces, and carbon-based raw materials participate in the reaction as a reducing agent to eventually generate calcium carbide (calcium carbide) . [0003] Calcium carbide is pro...

Claims

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Application Information

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IPC IPC(8): C01B31/32C01B32/942
Inventor 吴道洪张顺利丁力
Owner SHENWU ENVIRONMENTAL TECH CO LTD
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