Mathematical modeling and experimental research of the method of plasma chemical purification of metallurgical-grade silicon

One of the major lines of solar energy development is the creation of environmentally friendly, wasteless and cheap solar-grade silicon production technology. Currently the main silicon production technologies are based on reduction of silicon hydrogen chloride compounds: trichlorosilane, tetrachlorosilane, monosilane. These technologies use harmful and potentially dangerous compounds in quantity. These productions can be profitable only at big volumes (more than 1000 tons per year). The paper presents the research results of mathematical modeling and experimental research of metallurgical-grade silicon purification by the method of plasma chemical treatment of silicon melt up to solar-grade level with further direct crystallization in one reactor.