Calcium Carbide is manufactured by the reaction of lime and carbon in an electric arc furnace at a temperature of 2300°C. Söderberg electrodes are used to supply the electric current that provides the energy needed for the chemical reaction.
CaO (s) + 3C (s) = CaC2 (l) + CO (g)Calcium Carbide is mainly used in the production of acetylene. The volume of gas that is generated by using our Calcium Carbide is normally around 300 l/kg. The Carbide is crushed and screened in a range of sizes from 0-80 mm. The size requirement for Carbide would depend on:
- The application (Steel or Gas industry)
- The design of the generator used by the Customer. The most popular size for the production of acetylene is 25–50mm.
Oversize would cause problems in the feeding system of the generators, for this reason SACC has a strict control on grain sizes.
Acetylene Gas Generation
The main application of Calcium Carbide is the generation of Acetylene Gas when it reacts with water. Acetylene Gas is used for welding and cutting steel. It is also used as a raw material in the chemical industry.
Calcium Carbide is used as a desulphuriser in the metallurgical industry to remove sulphur from the iron before it is converted to steel in the BOF.
It is a blend made of Calcium Carbide and other additives. The composition of the final blend depends on the Customer’s requirement and on their specific process and plant design. SACC is able to produce any blend that would be fit for purpose for each customer’s needs.
Desulfurization has to be seen as a Challenge and an Opportunity to improve the efficiencies at the steelmaking plant. The capability of removing sulphur from the steel in a predictable and consistent way provides an opportunity to reduce costs by using lower quality scrap.
Calcium Carbide is also used for FeO and MnO deoxidation in the steel industry. These oxides are introduced in the steel after furnace or converter tapping and are present in the slag. Calcium Carbide is widely used as well in the reduction of Ferroalloys and Aluminium consumptions when deoxidizing the steel. There are many economic benefits in using Calcium Carbide for this specific application. SACC can Customize deoxidiser blends that suits every steel plant needs.
Acetylene Carbon Black
Acetylene Carbon Black (ACB) is produced when acetylene gas comes into contact with heated refractory material (900°C) under control circumstances. The reaction results in the cracking of the gas forming Carbon and Hydrogen, exothermically.
C2H2 → 2C + H2
The carbon is collected pneumatically using air suction and bagged for sale.
ACB has the ability to absorb large volumes of electrolyte and have a low resistance to conducting electricity. These properties make ACB particularly suited for use in the manufacture of dry cell batteries.
It can also be used in electric conductors.