Particle Size 1-5mm Synthetic Graphite For Brake Pads Lining Graphitized Calcined Petroleum Coke
Products Description
Petroleum coke is a black or dark gray hard solid petroleum product with metallic luster and is porous. Petroleum coke components are hydrocarbons, containing 90-97% carbon, 1.5-8% hydrogen, nitrogen, chlorine, sulfur and heavy metal compounds.
Application
According to the different sulfur content, it can be divided into high-sulfur coke (sulfur content above 3%) and low-sulfur coke (sulfur content below 3%).
Low-sulfur coke can be used as anode paste and prebaked anodes for aluminum plants and as graphite electrodes for steel plants. Among them, high-quality low-sulfur coke (sulfur content less than 0.5%) can be used to produce graphite electrodes and carbon enhancers. Normal quality low-sulfur coke (less than 1.5% sulfur) is often used to produce prebaked anodes. Low-quality petroleum coke is mainly used for smelting industrial silicon and producing anode paste.
High-sulfur coke is generally used as a fuel in cement plants and power plants.
In the case of graphite electrodes for steelmaking or anode pastes (melting electrodes) for aluminum and magnesium production, in order to adapt the petroleum coke (green coke) to the requirements, the green coke must be calcined. The calcination temperature is generally around 1300 ° C, the purpose is to remove the volatile components of petroleum coke as much as possible. In this way, the hydrogen content of the recycled petroleum coke can be reduced, and the graphitization degree of the petroleum coke can be improved, thereby improving the high temperature strength and heat resistance of the graphite electrode, and improving the electrical conductivity of the graphite electrode. Calcined coke is mainly used in the production of graphite electrodes, carbon paste products, diamond sand, food-grade phosphorus industry, metallurgical industry and calcium carbide, among which graphite electrodes are the most widely used.