硅> 98.8%,铁< 0.35%,镍< 0.76%,钙+镁 < 0.36%,钾+钠< 0.27%,硫+磷< 0.0015%,Fe、AS、HgF等无含量
硅>98%,铁0.02%
半透精砂#板材砂#滤料#填充料8-16 16-26 26-40 40-70 70-120
硅>97%
硅99.86%,铝0.03%,铁0.003%
硅99.886%,未酸洗,只做了磁选,未烘干
硅99.50%,铁0.019%,烧白96.6