Cocarbonization of two Canadian weathered coals and their formed cokes through copreheattreatment.

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Cocarbonization of two Canadian weathered coals of Quintette and Balmer was studied using coal tar, A240 and A240-LS pitches as coking additives. Both coals which had severely lost their fusibility by weathering could be modified by the cocarbonization with the additives to give better coking properties, the extent of improve-ment being strongly dependent upon the characteristics of coal and additives added. Weath-ered Balmer coal was much better than weathered Quintette coal in terms of fusion, adhe-sion and anisotropic development. Better hydrogen donors modified more extensively the above weathered coals. Hydrochloric acid wash results in considerable reduction of calcium content in coal to provide the improvement of coking properties to the above one's, and consequently enables them to give better fusibility event in the carbonization with a poor hydrogen donor additive. The formed cokes of weathered coals through the copreheattre-atment with a proper additive of proper amount under suitable conditions provided a disk type of coke with very high mechanical strength above 150kg/cm<SUP>2</SUP>. Oxygen containing functional groups will be discussed on the weathered coals with elemental analysis ESCA, FT-IR and relative intensity of CO to CO<SUB>2</SUB>.
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