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Long chain polysaccharide polymers, such as carboxymethyl cellulose (CMC) and guar gum, are commonly used in flotation to depress gangue minerals. These depressants are in widespread use in the flotation of platinum group minerals contained in the Merensky ore body where the dominant gangue minerals are talc, pyroxene and feldspar. The molecular weight and degree of substitution of these polysaccharides...
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