C - Chemistry – Metallurgy – 10 – B
Patent
C - Chemistry, Metallurgy
10
B
202/42
C10B 57/02 (2006.01) C10L 9/08 (2006.01)
Patent
CA 1137017
ABSTRACT OF THE DISCLOSURE A process for calcining green coke obtained by a delayed coking process in at least three stages of heating furnaces which are connected in series and the control of the temperature and the adjustment of the atmosphere in each furnace can be independently. carried out, which process comprises carrying out, in the respective furnaces in the indicated order,the steps of : a) evaporating the water contained in the green coke, and drying and preheating the coke; b) distilling off the volatile matter from the dried coke, and preliminarily calcining the coke; and c) burning the volatile matter from the step b), and calcining the coke, the coke from the step b), after being once cooled, be- ing introduced into the step c). Because each furnace can be controlled independent- ly from the other furnaces in the above described pro- cess, it is possible to produce high-grade coke without process difficulties such as the loss of the coke by combustion and the formation of coke ring. The inter- mediate cooling between the steps b) and c) is effec- tive in further improving the quality, especially the coefficient of thermal expansion and the true density, of the product coke. The heat for reheating the once- cooled coke is given by the combustion heat of the vola- tile matter from the step b).
333102
Komi Nobuyuki
Noguchi Kosaku
Koa Oil Company Limited
Macrae & Co.
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