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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.

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Presentation Transcript
slide1

FLOTATION

OF MINERAL

MATERIALS

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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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Simplified model of coal unit

Contact angle depends on method

of measurement

Hydrophobicity of coal vs. coalification degree

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Zeta potential (and electrical charge) depends on coalification degree

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

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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)

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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)

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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)

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Class 4. Oxides and hydroxides

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

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Class 4. Oxides and hydroxides

Oleate flotation of oxide and silicates

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Class 4. Oxides and hydroxides

Amine flotation of quartz

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Class 5. Sparingly soluble salts

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

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Class 5. Sparingly soluble salts

Flotation with potassium octylohydroxymate

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