Method for producing silicon using microwave, and microwave reduction furnace

摘要

A method for producing silicon using microwave and a microwave reduction furnace for use therewith are disclosed, with which it is possible to quickly reduce silica to quickly produce silicon. A material (2) of a mixture of a silica powder and a graphite powder of a mixture of a silica powder, a silicon carbide powder and a graphite powder is set in a refractory chamber (12). Then, the material set in the chamber is irradiated with microwave. The graphite powder absorbs a microwave energy to increase the temperature, after which silica and graphite react with each other to further increase the temperature while producing silicon carbide, and the heated silica and silicon carbide react with each other. SiO produced through this reaction and silicon carbide are allowed to react with each other, thereby producing high-purity silicon.