Process for coal gasification utilizing a rotary kiln

Abstract From the Canadian patent

A rotary kiln coal gasification process capable of processing caking coals wherein controlled agglomeration of the coal is permitted without adverse process effects. Caking coals have an agglomerating temperature range and while in this range the coal is in a semi-plastic state which causes individual particles to stick together on contact and form agglomerates. After passing through this agglomerating temperature range during which most volatiles and tars are removed a temperature, is reached where the coal particles become less sticky and with, sufficient agitation and maintenance of bed temperature the, agglomerates will break up. In this process the temperature of the coal is increased …