Abstract
Cassiterite flotation, irrespective of trace element dopant, follows the electrostatic theory of flotation with sodium dodecyl sulfate and dodecyl ammonium acetate collectors. This appears to be the underlying mechanism for cassiterite flotation with a broad variety of collectors, though other attachment mechanisms are frequently superimposed on this basic mechanism. The flotation of cassiterite with these collectors is strongly influenced by the dopant present, with the ease of flotation following the pattern: Fe 3+-doped > undoped > Sb 5+-doped SnO 2 The Fe 3+-doped material floats at about one-tenth the collector concentration required to float the Sb 5+-doped material.
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