| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing high-purity metallic Si, by which high-purity metallic Si to be a raw material for manufacturing solar cells and chemical products can be produced without decreasing a yield of the produced metallic Si or without decreasing the working efficiency. <P>SOLUTION: The method for producing metallic Si 9 comprises: feeding a raw material 7 to an arc furnace 1, the raw material comprising silicon ore having SiO2 as a main component and a reducing agent containing SiC and a carbon-based reducing agent; and reducing the SiO2. When the total amount of the reducing agent is set to 100%, the amount of SiC in the reducing agent is controlled to 20 to 80% in terms of a molar ratio, and the balance is the carbon-based reducing agent. Further, the total amount of P and B included in the reducing agent is controlled to 20 ppm by mass or lower. <P>COPYRIGHT: (C)2013,JPO&INPIT |
