selective depression of pyrite with polyacrylamide in britain

selective depression of pyrite with polyacrylamide in britain
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  • Are organic polymers better pyrite depressants?
  • Organic polymers have been considered as more favorable pyrite depressants. Polymer chemistry plays a decisive role in the depression action. Parameters like molecular weight, content of functional groups, charge density and configuration are important.
  • Why does pyrite have a selective depression?
  • The selective depression of pyrite was attributed to the formation of more copper hydroxide species on copper-activated pyrite surface through the consumption of oxygen ( Shen et al., 2001 ). Galvanic interactions may occur between the cuprous sulfide layer on pyrite or sphalerite surface and the mineral itself.
  • Why is pyrite flotation induced by polysaccharides?
  • By selection of the correct polysaccharide, separation of otherwise similar minerals can be achieved. The depression of pyrite flotation by polysaccharides is due to the selective adsorption of polysaccharides polymers on pyrite surface.
  • What causes selective depression of pyrite in chalcopyrite flotation?
  • He et al. (2006) indicated that the selective depression of pyrite in the flotation of chalcopyrite was due to the selective adsorption of zinc hydroxide on pyrite surface via electrostatic interactions between zinc hydroxide and ferric hydroxide in mildly alkaline pH conditions.