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Xanthates are solid, light-yellow products, used in the flotation of sulfides and metallic minerals. Basic compounds of Xanthates are Carbon Disulfide, Caustic Soda (Sodium Hydroxide) or Potash (Potassium Hydroxide) and a determined alcohol, which provides it with collecting properties in flotation processes of metallic and polymetallic minerals.
All Xanthates are water-soluble; they are usually fed in as aqueous solutions in a 5 to 20% concentration in weight.
These reagents are widely used for all sulfide minerals, with a high tendency to float iron sulfide, except when using depressors. They cannot be used in highly acid circuits, because they tend to decompose.
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POTASSIUM ETHYL XANTHATE (Z-3)
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It is the highest selectivity reagent due to its short carbonate chain. Generally used in complex Ag/Pb or Zinc ores. |
SODIUM ISOPROPYL XANTHATE (Z-11)
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Similar to the previous one for its carbonate chain and low cost. It is the most used chemical reagent in Peru for the treatment of polymetallic minerals. |
SODIUM ISOBUTHYL XANTHATE (Z-14)
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Collector widely used to float Pb, Ag and Zinc sulfurs. It is also used in the copper flotation circuits with good metallurgical results. In some cases, it substitutes PAX (Potassium Amyl Xanthate). |
SODIUM SEC-BUTHYL XANTHATE (Z-12)
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Collector of similar action as Sodium Isobuthyl Xanthate, used in lead or zinc circuits. |
POTASSIUM AMYL XANTHATE (Z-6)
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Powerful reagent and the least selective, this product is generally used in rapid action circuits and mostly in the treatment of marmatitic zinc minerals. It is also used in moderate acidity flotation circuits. |
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