The main components of calcium carbide are inorganic compounds, white crystals, industrial products are gray black blocks, and the section is purple or gray. In case of water, it immediately reacts violently to generate acetylene and release heat. Calcium carbide is an important basic chemical raw material, which is mainly used to produce acetylene gas. It is also used in organic synthesis, oxyacetylene welding, etc.
Calcium carbide is one of the basic raw materials in the organic synthetic chemical industry. It is an important raw material for acetylene chemical industry. Acetylene made from calcium carbide is widely used in metal welding and cutting.
Production methods include aerobic heating method and electrothermal method. Generally, calcium carbide is produced by electrothermal method, that is, quicklime and carbonaceous raw materials (coke, anthracite or petroleum coke) are produced by arc high-temperature melting reaction in calcium carbide furnace. The production process is shown in the figure. The main production process is: raw material processing; mixed ingredients; Add the mixture into the electric furnace through the inlet or pipe at the upper end of the electric furnace, heat it to about 2000 ℃ in an open or closed electric furnace, and generate calcium carbide according to the following reaction: gao+3c → cac2+co. The melted calcium carbide is taken out from the bottom of the furnace, cooled and broken, and then packaged as finished products. The carbon monoxide generated in the reaction is discharged in different ways according to the type of calcium carbide furnace: in an open furnace, carbon monoxide burns on the charge surface, and the flame generated spreads outward with the dust; In the semi closed furnace, part of the carbon monoxide is extracted by the suction hood placed on the furnace, and the rest is still burning on the charge surface; In the closed furnace, all carbon monoxide is extracted.
