400-600ppm的普砂
硅微粉,烧白83,目数1700左右,含硅>98.9%
铁400ppm-600ppm,石英普砂,325目硅微粉,量大来谈
硅含量≥98.8%,铁含量450ppm-600ppm,石英原砂,非岩破碎、水洗砂,25-125目
天然石英砂、玻璃原料等,含硅99.2%-99.5%,含铁600ppm-80ppm,目数20-120,非石英石机制砂非海砂
硅含量≥99.5%(可达99.8%),铁含量≤0.06%(可达0.008%),铝含量≤0.40%,钛≤0.03%