Method for refining of silicon

Details Method for refining of silicon Method for refining of silicon

C - Chemistry, Metallurgy

01

B

C01B 33/037 (2006.01)

Patent

CA 2153932

The present invention relates to a process for removing impurities from molten silicon by treatment of molten silicon contained in a vessel with a slag having the capability of removing the impurities, particularly boron from molten silicon wherein slag is continuously or substantially continuously added to the molten silicon and that the slag is continuously or substantially continuously inactivated or removed from the silicon melt as soon as equilibrium between the slag and molten silicon is reached with respect to the impurity elements or element to be removed.

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