6 The sponge electrode is then positioned inside of a vacuum arc furnace for melting. On this water-cooled, copper container, An electrical arc is used to melt the sponge electrode to kind an ingot. The remaining two isotopes of silicon type only 7% of your By natural means transpiring silicon. https://rylanhtdlu.p2blogs.com/34610842/detailed-notes-on-micro-silica