This study aimed to clarify the optimum combustion condition from the viewpoint of rice husk charcoal and heat utilization, assuming the design and operation of the rice husk combustion furnace. Rice husk charcoal was prepared by electric furnace on the 18 combustion conditions, combination of combustion temperature (400, 600, and 800°C), combustion time (3 and 60 min) and air supply speed (0.0, 0.3, and 0.5 m/s). The amount of rice husk charcoal produced was calculated from the weight difference before and after burning, and the acquired heating value was calculated from unburned carbon. As a result, it was shown that combustion at high temperature (800°C), short time (3min), small to moderate (0.0 - 0.3 m/s) air supply speed is suitable. In the future, it is necessary to evaluate rice husk combustion considering utilization of rice husk charcoal.
