Coke is mainly used in blast furnace ironmaking and smelting of nonferrous metals such as copper, lead, zinc, titanium, antimony and mercury, and plays the role of reducing agent, heating agent and material column skeleton. Using coke instead of charcoal in ironmaking blast furnace has laid the foundation for large-scale modern blast furnace, which is a major milestone in metallurgical history. In order to obtain better technical and economic indexes in blast furnace operation, metallurgical coke must have appropriate chemical and physical properties, including thermal properties during smelting. Coke is not only widely used in ironmaking and nonferrous metal smelting (metallurgical coke), but also widely used in casting, chemical industry, calcium carbide and ferroalloy, with different quality requirements. Such as casting coke, generally requires large particle size, low porosity, high fixed carbon and low sulfur content; Coke for chemical gasification does not require high strength, but requires good reactivity and high ash melting point; Coke for calcium carbide production requires increasing the fixed carbon content as much as possible.
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