QUALITY AND PRODUCTIVITY OF COKE CARBONIZ ED OF EXPERIMENTAL OVEN CONSTRUCTED CHAMBER WALL MADE OF HIGH THERMAL-CONDUCTIVITY MATERIAL

In order to clear the effect of thermal conductivity of chamber wall o n coke quality and productivity, coke was carbonized at the range from 800 degrees C to 1000 degrees C by a test coke oven. The chamber widt h was from 200mm to 450mm and was equal to that of a conventional coke oven. Using the chamber wall made of stainless steel as a high therma l conductivity material, the wall temperature of combustion chamber si de was same as that of coke oven chamber side. Then, the following res ults were obtained. (1) When the heating rate in coal bed at the range from 400 degrees C to 500 degrees C was equal to that of conventional coke, the size, drum index and reactivity of coke carbonized about 85 0 degrees C were equal to that of conventional coke. (2) Increasing th e heating rate, the drum index of coke carbonized at medium temperatur e using low fluidity blend coal became high. (3) When coke was carboni zed under the condition of wall temperature from 800 degrees C to 850 degrees C, the coking time and productivity were same as that of conve ntional coke. Therefore, increasing thermal conductivity of chamber wa ll, quality and productivity of coke carbonized at medium temperature were equal to that of conventional coke oven.