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FLOTATION OF MINERAL MATERIALS

FLOTATION OF MINERAL MATERIALS. Classification of materials according to their ability to flotation. Class 1. Naturally hydrophobic materials. Graphite, talc, sulfur, some sulfides, coals. collectors: apolar compounds which increase hydrophobicity and speed up flotation.

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FLOTATION OF MINERAL MATERIALS

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  1. FLOTATION OF MINERAL MATERIALS

  2. Classification of materials according to their ability to flotation

  3. Class 1. Naturally hydrophobic materials Graphite, talc, sulfur, some sulfides, coals collectors: apolar compounds which increase hydrophobicity and speed up flotation

  4. Simplified model of coal unit Contact angle depends on method of measurement Hydrophobicity of coal vs. coalification degree

  5. Zeta potential (and electrical charge) depends on coalification degree Coalification vs H, O, and C content in natural carbonaceous matter

  6. Class 2. Native metals and sulfides A) Metals occurring in nature: iron, mercury, copper, gold, platinum metals B. Sulfides: lead (galena, PbS) copper (chalcocite, covellite, chalcopyrite, bornite) silver (argentite) zync (sphalerite)

  7. Class 2. Native metals and sulfides

  8. Xanthate flotation of pyrite

  9. Class 3. Oxidized minerals of non-ferrous metals cerussite (PbCO3) vanadinite (Pb5[Cl(VO4)3]) anglesite (PbSO4) malachite (CuCO3·Cu(OH)2 azurite (2CuCO3·Cu(OH)2) chrysocolla (hydrated copper silicate) tenorite (CuO) cuprite (Cu2O) smithsonite (ZnCO3)

  10. Class 3. Oxidized minerals of non-ferrous metals Approaches: 1. Sulfidization 2. Flotation using either cationic or anionic collectors (as in the case of oxide-type minerals)

  11. Class 4. Oxides and hydroxides Consists of simple oxides (Fe2O3, SnO2), oxyhydroxides (AlOOH) as well as complex oxides and complex hydroxides (spinels, silicates, aluminosilicates).

  12. Class 4. Oxides and hydroxides Oleate flotation of oxide and silicates

  13. Class 4. Oxides and hydroxides Amine flotation of quartz

  14. Class 5. Sparingly soluble salts

  15. Class 5. Sparingly soluble salts NaOl - sodium oleate, DDA-dodecylamine, SDS,- sodium dedecyl sulfite

  16. Class 5. Sparingly soluble salts Flotation with potassium octylohydroxymate

  17. Class 5. Sparingly soluble salts

  18. Class 6. Soluble salts

  19. Class 6. Soluble salts

  20. Hallimond flotation cell

  21. Laboratory Mechanobr flotation machine

  22. Denver DR flotation machine

  23. Jameson flotation cell

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