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FLOTATION OF MINERAL MATERIALS PowerPoint PPT Presentation


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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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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


Simplified model of coal unit

Contact angle depends on method

of measurement

Hydrophobicity of coal vs. coalification degree


Zeta potential (and electrical charge) depends on coalification degree

Coalification vs H, O, and C content in natural carbonaceous matter


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)


Class 2. Native metals and sulfides


Xanthate flotation of pyrite


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)


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)


Class 4. Oxides and hydroxides

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


Class 4. Oxides and hydroxides

Oleate flotation of oxide and silicates


Class 4. Oxides and hydroxides

Amine flotation of quartz


Class 5. Sparingly soluble salts


Class 5. Sparingly soluble salts

NaOl - sodium oleate, DDA-dodecylamine, SDS,- sodium dedecyl sulfite


Class 5. Sparingly soluble salts

Flotation with potassium octylohydroxymate


Class 5. Sparingly soluble salts


Class 6. Soluble salts


Class 6. Soluble salts


Hallimond flotation cell


Laboratory Mechanobr flotation machine


Denver DR flotation machine


Jameson flotation cell


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