Abstract
Heat consumption for carbonization of coking coals is based on sensible heat for coking products and heat of reaction. The heat of reaction is calculated from the difference of heat of combustion between coal and its products. In commercial coke oven, heat for water gas reaction is also necessary to be added to heat consumption because water generated from coal contacts in coke zone during carbonization.In the present report, the total heat consumption described above (Net-HC) was investigated with 26 coking coals.The following results were found.(1) The values of Net-HC were in the range from 280 to 460 kcal/kg of dry coal.(2) Net-HC is decreased with developing coal rank and can be estimated efficiently from volatile matter, atomic ratio H/C and O/C of coal as described below.Net-HC (kcal/kg) =22.8 (VM)-548 (H/C) +320 (O/C) +808
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