Commercially, Silicon is purified by heating sand and carbon in An electrical furnace. A molten salt electrolysis process is utilized to obtain ultrapure silicon. Elemental silicon is created commercially with the reduction of silica (SiO2) with coke in an electric furnace, as well as the impure item is then refined. https://bendingmachine37047.bloggip.com/36646695/about-boron-carbide