coke
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Coke is a grey, hard, and porous fuel made from coal that contains high amounts of carbon and very few impurities. It matters because it is widely used in industrial processes, particularly in steel and iron production, where its properties make it an essential ingredient.
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Raw coke
Coke is a grey, hard, and porous coal-based fuel with a high carbon content. It is made by heating coal or petroleum in the absence of air. Coke is an important industrial product, used mainly in the smelting of iron ore, but also as a fuel in stoves and forges.