... : lump, powder, granule and so on. Supply Silicon Metal 5531.Si 98.5%min,Fe 0.5% ... researching and marketing of silicon metal, silicon powder, and also engaged in polysilicon, magnesium ingot, petroleum coke and other ... polysilicon, electronics, refractory materials and so on.Silicon Metal, also called Crystal Silicon, is silver-gray,hard- ... authorized by SGS in silicon field. Supply Silicon Metal 553