How to produce calcium carbide industrially?

Industry generally use electric furnace smelting method and oxygen heat method, electric furnace smelting method is the coke and calcium oxide (molecular formula CaO) in about 2200 ℃ in the electric furnace smelting, generating calcium carbide. Oxygen heat method: namely: blast furnace oxygen-rich oxygen heat method of melting calcium carbide, limestone in the extraction of carbon, high temperature and low pressure gas furnace.

This one furnace three use technology, so that the production of comprehensive utilization of the coal gasification process of waste heat and coal ash, coal ash plus ingredients melted to generate calcium carbide and ferrosilicon; "high temperature and low pressure" gas generator, so that the generation of gas naturalization.

Each melting a ton of 80% calcium carbide, from the limestone to extract the pure carbon 168kg or so, to produce gas 6000-2600 cubic meters, can produce about 4.5 tons of methanol. Oxygen-enriched both to increase the furnace temperature and improve the CO quality of the gas, oxygen is particularly useful for two purposes at once, coal thermal energy utilization after the gas, for coal chemical industry or clean power generation. This process is non-consumption of energy type and non-polluting type of calcium carbide production and coal gas production.

Extended information

The application of calcium carbide:

(1) calcium carbide and water reaction of acetylene can be synthesized into many organic compounds, such as: synthetic rubber, synthetic resins, acetone, allyl ketone, carbon black, etc.; at the same time, acetylene oxygen flame is widely used in metal welding and cutting.

(2) heating powdered calcium carbide and nitrogen, the reaction generated calcium cyanamide, lime nitrogen is an important raw material for the preparation of amino cyanide. Heating lime nitrogen Reaction with salt to generate the melt is used for gold mining and non-ferrous metal industry.

(3) Calcium carbide itself can be used as a desulfurizer in the steel industry.

(4) In the old days, when miners went down the mine, they put calcium carbide into iron cans and used the acetylene generated to make calcium carbide lamps.

Baidu Encyclopedia-Calcium Carbide