抄録
After alloying about 3 kg of crude silicon into about 4.5 kg of molten aluminium, the alloys thus prepared have been electrolysed in hydrochloric acid solution. The silicon crystals gathered as the anode slime have been washed with hydrofluoric acid solution and aqua regia.
The purified silicon thus obtained weighted about 1 kg (yield 30%) and the impurities contained in it have been found to be as follows: Al 0.18%, Fe 0.003%, trace of Ca, C 0.022%, Ti 0.001% and P 0.003%, The quantities of several materials, chemicals and the electric power as well as their cost have been estimated in order to produce 1 kg of purified silicon.
