Metallurgical coal | Credit: CTI PLUS Resources

Coking coal, also called metallurgical coal or met coal, is a specialized grade of coal that can be converted into metallurgical coke for primary steelmaking via the blast furnace route. The defining characteristic is its caking ability—when heated to 350-550°C in a low-oxygen environment, coking coal softens into a plastic state, swells, and then resolidifies into a strong, porous, coherent mass of coke.

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