Metallurgical Coke

Metallurgical coke, also known as "Met" coke, is a carbon material manufactured by the "destructive distillation" of various blends of bituminous coal. Bituminous coal is a soft, medium grade coal that contains a high percentage of volatile components. Destructive distillation is performed in "coke batteries" which are banks of large enclosed kilns. Once the kilns are loaded, they are heated to approximately 1000 C in the absence of air. During the heat cycle the volatile components of the coal are released and the solid coal goes through a partial melt and subsequent re-solidification to a non-melting carbon. Volatile components include coal tar, ammonia, and literally dozens of other "products of decomposition". Most volatile components are reclaimed or recycled.