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Patent US4401638 Process for purifying silica sand Google A process of purifying silica sand comprises grinding sandstone washing and

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A process of purifying silica sand comprises grinding sandstone washing and desliming the ground sandstone to remove the major part of the clay-type

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Patent US4401638 Process for purifying silica sand - 30 Aug 1983 A process of purifying silica sand comprises grinding sandstone washing and a

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This invention concerns a process for purifying silica produced from an alkali silicate aqueous solution which usually contains more than 200 ppm of impurities to

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Purification of Tronoh Silica Sand via preliminary process of mechanical milling Nazratulhuda H1 and Othman M 1 1Department of Mechanical Engineering Universiti

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Patent US4401638 Process for purifying silica sand A process of purifying silica sand comprises grinding sandstone washing and desliming the ground sandstone

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