Density Distribution in Lump Coke during Carbonization

Abstract

A commercial-scale coke oven chamber was shock-cooled during the carbonization process, the state of carbonization inside the coke oven was studied, and analyzed the pieces sampled from the oven. Authers clarified the following facts from these studies and analyses. (1) There were two distinct features about the density distribution inside lump coke obtained from the shock-cooled oven. One was the layered density distribution in the direction parallel to the oven wall. The other was the steep decrease of the density in the part from 60 to 90mm from the oven wall. (2) We could make clear the above two facts by taking into consideration the following investigations. Gas pressure in the plastic layer changed with fluctuations of gas pressure in coal layer, and the shape of bubbles in the plastic layer were deformed with these gas pressure fluctuations.(3) Depending on the layered density distribution, permeability and tensile strength of coke have different values in the directions of oven length and width respectively. © 1994, The Japan Institute of Energy. All rights reserved.