Metallurgical coke powder
Metallurgical coke powder is the coke from high temperature coking used in blast furnace smelting, casting and gasification. The recovered and purified coke oven gas produced in the coking process is not only the fuel with high calorific value, but also an important industrial raw material for organic synthesis. Metallurgical coke is a general term for blast furnace coke, foundry coke, ferroalloy coke and nonferrous metal metallurgical coke. Because more than 90% of the metallurgical coke is used in the blast furnace smelting iron, so often referred to as blast furnace coke metallurgical coke.
In the industry of carbon products, the metallurgical coke which is used as resistance material is transformed into graphitized metallurgical coke after the graphitized high temperature heat treatment.
A small amount of pyrolytic carbon is deposited on the surface or pore wall surface of metallurgical coke, which is generated by high temperature pyrolysis of hydrocarbons generated by coal pyrolysis in the process of coking. Pyrolytic carbon is anisotropic and its crystallization degree is relatively high. It can protect the coke to a certain extent when the metallurgical coke is oxidized or corroded.
In order to achieve better technical and economic indexes, metallurgical coke must have proper chemical and physical properties, including thermal properties in the process of smelting. In addition to the large amount of coke used in iron and non-ferrous metal smelting (metallurgical coke), but also used in casting, chemical industry, calcium carbide and ferroalloy, the quality requirements are different. Such as casting coke, the general requirements of particle size, low porosity, fixed carbon and low sulfur content; Coke for chemical gasification, the strength requirements are not strict, but the requirements of good reactivity, ash melting point is high; The fixed carbon content should be increased as far as possible for calcium carbide coke.