Quality and Productivity of Coke Carbonized by Experimental Oven Constructed Chamber Wall Made of High Thermal Conductivity Material

摘要

In order to clear the effect of thermal conductivity of chamber wall on coke quality and productivity, coke was carbonized at the range from 800 deg C to 1000 deg C by a test coke oven. The chamber width was from 200 mm to 450 mm and was equal to that of a conventional coke oven. Using the chamber wall made of stainless steel as a high thermal conductivity material, the wall temperature of combustion chamber side was same as that of coke oven chamber side. Then, the following results were obtained.(1) When the heating rate in coal bed at the range from 400 deg C to 500 deg C was equal to that of conventional coke, the size, drum index and reactivity of coke carbonized about 850 deg C were equal to that of conventional coke.(2) Increasing the heating rate, the drum index of coke carbonized at medium temperature using low fluidity blend coal became high.(3) When coke was carbonized under the condition of wall temperature from 800 deg C to 850 deg C, the coking time and productivity were same as that of conventional coke.Therefore, increasing thermal conductivity of chamber wall, quality and productivity of coke carbonized at medium temperature were equal to that of conventional coke oven