抄録
In the previous reports, the effects of ultrasonic wave in coking procedure and it's adaptability for improvement on the natures of coke were commented in detail, but several problems, with which we met in the preceding experiments, have not yet been completely resolved.
In order to make clearer the effects of ultrasonic wave in coking process and to explain the problems remained unaccounted for, a series of experiments are supplementarily carried out, using starch-paste and canada-balsam as the test materials.
The frequency and the introducing way of ultrasonic wave applied in the present experiment are also different from these in the last ones.
From the results obtained, we come to the presumption that the alternative layers of thick and thin wall in coke may take place simultaneousely, also that the ultrasonic wave may promote the orientation of graphite-crystallite as melted coal consolidates.
In this way, the effects of the ultrasonic wave in carbonization of coal become more perspicuous, but since suitable selection of it's frequency or power to be applied must be decided according to the nature of coal, further experiments using different kinds of coal are needed, untill more available results are obtained.
