removing impurities from silica sand

Posted at: December 7, 2012

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    Sep 20, 1983 · A process of removing iron impurities from ores, particularly useful for removing stains of iron impurities adhered to silica sand particles, comprises …

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  • US Patent # 4,405,588. Process of removing iron impurities from …

    A process of removing iron impurities from ores, particularly useful for removing stains of iron impurities adhered to silica sand particles, comprises grinding the …

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  • Process for purifying silica sand – Materias Primas, Monterrey, S.A.

    Aug 30, 1983 · All the prior art processes described above for removing iron impurities from silica sand, …

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  • US Patent # 5,334,364. Process for purifying silica sand – …

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  • Process for purifying silica sand – US Patent 4401638 Description

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    Silica Sand Uses. Found in a number of forms, including quartz crystals, … Untreated water passes through a slow sand filter removing bacteria and impurities.

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