Abstract
JFE Engineering Corp. has provided ten facilities of its unique high -temperature gasifying and direct melting furnace in Japan. These plants are able to treat and gasify various kinds 0f wastes and are capable of melting the ash through the usage of coke. In order to increase the environmental compatibility, JFE Engineering Corp. has developed various methods to reduce the consumption of coke. The possibility of using rice husk briquette as a coke substitute was investigated in a commercial plant. The results show that the rice husk briquette can substitute for coke having same calorific value. Despite of high temperature condition in the furnace, it is considered that the rice husk briquette can reach the bottom of furnace holding not only fixed carbon but also volatile matter. It was found that the coke reduction ratio exceeded 50%, which results 1n remarkable decrease in CO_2 emission.
