抄録
A new method of refining crude silicon which consists essentially in electrolysis of the Al-Si anode obtained by alloying crude silicon into molten aluminium as a solvent, has been proposed by the present writers. The principle of the method as well as the results of experimental observations concerning the behavior of the impurities contained in the crude silicon during the process have been described.
According to the experimental results, as a plan for carrying out the present refining method in practice, the flow-sheet shown in Fig. 8 has been found most suitable. The impurities contained in the refined silicon by the present method were determined to be as follows: 0.21% Al, 0.008% Fe, trace of Ca, 0.028% C, 0.001% Ti and 0.003% P.
