Abstract
Several methods for increasing bulk density of charge (i, e crushing by component, Oiling, Drying, Stamping, Loading after stamping) were compared, using many data obtained from 450mm wide 300kg test coke oven.
And the effect of the bulk density on productivity and characteristics of the coke were discussed.
And also the mechanism changing productivity and characterics of coke by increasing bulk density itself of charge were considered inductively.
Principal results are as follows
(1) Increasing bulk density of charge, at constant flue temperature, the produced cokebecome denser and coking time increase. But the increasing rate of coking time are less than that of the bulk desity, and the ratio of increasing rate about 0.5, so prductivity (B. D./C. T.) increase by increasing the bulk density and the ratio of increasing rate become also about 0.5.
Apparent specific gravity of coke increase nearly same rate with coking time
(2) The mechanism of changing productivity and characteristis of coke become clearer, if we consider them devided 2 stages as follows,
1st: The effect on increasing coke bulk density (_??_ Apparent Sp.Gr.) and decreasing shrinkage of coke in coking process.
2nd: Relation between,
Apparent sp.gr. and other characteristics of coke.
Apparent Sp.gr. and coking time.
These results are obtained from 300kg test coke oven's data in our laboratory, so, cannot slide to commersial oven simply, and then it needs attend to the difference on heating condition and compressive action in coking process each other, especially heating condition at oven top.
