Coke, iron ore and limestone are the main feedstock that BF to produce iron. Coke to provide heat, combined with the oxygen which in the iron ore to release iron; ensure the inside of the BF's permeability physical structure can makes the heat gas up; heating the feed, melted iron and slag infiltration down, this is the casting method.
Coke properties play a vital role in the BF productivity and the cost of iron produce. Coke is heated under anaerobic state about 1100 degrees to produce. The whole process is happened in coke oven, the tar and other easy volatile mixture is released together with hydrogen and methane; leave the high-carbon products.
Most people want to have the characteristics of coke are: high carbon content; lower sulfur, phosphorus and moisture content; low ash amount; superior physical properties.
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