The Carbonisation Process
Coal delivered by rail, first from the nearby Bolsover colliery, and later from other sources, was heated in 8 large air sealed ovens called "batteries". Volatile constituents were driven off and condensed into coal oil and a watery fraction called ammoniacal liquor. Coal gas was used to heat the ovens and also burned in the works boilers and furnaces. Any excess was flared off. The coal oil and liquor were piped over the road to the chemical works section where they were processed into various fractions and industrial chemicals. The residual Coalite solid fuel was cooled, then sorted into various grades based on size and stockpiled for distribution by road transport.
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