Metallurgical coke
Category
Metallurgical coke is a collective term encompassing blast furnace coke, foundry coke, ferroalloy coke, and coke used in the smelting of nonferrous metals. Mainly used for Blast furnace ironmaking and in the blast furnace smelting of nonferrous metals such as copper, lead, zinc, titanium, antimony, and mercury, it serves to… Reducing agent , heating agent and charge column Skeletal function.
Bituminous coal, when heated to 950–1050°C in the absence of air, undergoes stages such as drying, pyrolysis, melting, coking, solidification, and shrinkage, ultimately producing coke. This process is known as high‑temperature coking (high‑temperature dry distillation). Since over 90% of metallurgical coke is used in blast furnaces for ironmaking, blast furnace coke is often referred to simply as metallurgical coke. According to particle size, it is classified into 60–80 mm, 40–60 mm, 25–40 mm, 10–25 mm, and <10 mm.
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Foundry coke is a specialized type of coke used in cupola furnaces for melting iron. It serves as the primary fuel, melting the charge and superheating the molten iron while supporting the burden column to maintain optimal permeability. Consequently, foundry coke must exhibit large lump size, low reactivity, low porosity, adequate resistance to impact and crushing, and low ash and sulfur contents.
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