Abstract
This paper deals at length with some results obtained from a series of coking experiments which has been continvously carried out, in order to obtain good coke for modern blast furnace from non-coking coals.
The equipment used for the experiment, or the way of carbonization is the same to those mentioned in the preceding paper, but the introducing way of ultrasonic wave into the coal of plastic state is different.
In the previous experiments ultrasonic wave had been directly introduced through the graphite conical horn into melted coal, resulting in that the figures of cokes obtained under the microscope were extremely complicated, and that we have met much difficulties to explain the effects of ultrasonic wave during carbonization. In the present experiments, however, the wave is also introduced through the same horn, not directly to melted coal, but to graphite or soft steel cover which is put on coal sample settled in graphite oven.The ultrasonic wave is thus converted in the stationary one and transported further into melted coal.
In this way, the effect of the ultrasonic wave in the coke figures becomes clearer, and the application of the wave for improvement on the nature of cokes is confirmed.
