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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



Class 1. Naturally hydrophobic materials flotation

Graphite, talc, sulfur, some sulfides, coals

collectors: apolar compounds which increase hydrophobicity and speed up flotation


Simplified model of coal unit flotation

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 coalification degree

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)



Xanthate flotation of pyrite coalification degree


Class 3. Oxidized minerals of non-ferrous metals coalification degree

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 coalification degree

Approaches:

1. Sulfidization

2. Flotation using either cationic or anionic collectors (as in the case of oxide-type minerals)


Class 4. Oxides and hydroxides coalification degree

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


Class 4. Oxides and hydroxides coalification degree

Oleate flotation of oxide and silicates


Class 4. Oxides and hydroxides coalification degree

Amine flotation of quartz



Class 5. Sparingly soluble salts coalification degree

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


Class 5. Sparingly soluble salts coalification degree

Flotation with potassium octylohydroxymate



Class 6. Soluble salts coalification degree


Class 6. Soluble salts coalification degree


Hallimond flotation cell coalification degree



Denver DR flotation machine coalification degree


Jameson flotation cell coalification degree


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