Summary:Petroleum coke (Petroleum coke) is a product of crude oil that is distilled to separate light and heavy oils, and then the heavy oils are converted into product
Petroleum coke (Petroleum coke) is a product of crude oil that is distilled to separate light and heavy oils, and then the heavy oils are converted into products through the process of thermal cracking. From the appearance, the coke is black with irregular shapes and different sizes. Lump (or particles), with metallic luster, coke particles have a porous structure, the main element is carbon, occupying more than 80wt%, and the rest are hydrogen, oxygen, nitrogen, sulfur and metal elements. Petroleum coke has its unique physical, chemical and mechanical properties. It is the non-volatile carbon of the heat-generating part. The indicators of volatiles and mineral impurities (sulfur, metal compounds, water, ash, etc.) determine the chemical properties of coke.
Needle coke: With obvious needle-like structure and fiber texture, it is mainly used as high-power and very high-power graphite electrodes in steelmaking. Because needle coke has strict quality index requirements in terms of sulfur content, ash content, volatilization and true density, there are special requirements for the production process and raw materials of needle coke.
Sponge coke: It has high chemical reactivity and low impurity content. It is mainly used in aluminum smelting industry and carbon industry.
Projectile coke: It is spherical in shape with a diameter of 0.6-30mm. It is generally produced from high-sulfur, high-asphaltene residue and can only be used as industrial fuels such as power generation and cement.
Powder coke: It is produced by fluidized coking process, with fine particles (0.1-0.4mm in diameter), high volatile content and high coefficient of thermal expansion, so it cannot be directly used in electrode preparation and carbon industry.
The main application area of petroleum coke is the electrolytic aluminum industry, which accounts for more than 65% of the total petroleum coke consumption, followed by carbon, industrial silicon and other smelting industries. The use of petroleum coke as fuel is mainly in cement, power generation, glass and other industries. , A small proportion
Key Parameters Of Petroleum Coke Grinding
|Grindability coefficient (HGI)||Initial moisture (%)||Final moisture (%)|
1. The grind ability parameter of petroleum coke material is a factor that affects the output of the mill. The lower the grind ability coefficient, the lower the output;
2. The initial moisture content of the raw materials is generally 6%. If the moisture content of the raw materials is greater than 6%, the dryer or the mill can be designed with hot air to reduce the moisture to increase the output and the quality of the finished product.
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