Separation of fine particles by floc flotation

Soto, H.; Barbery, G.

doi:10.1016/b978-0-08-036448-3.50036-0

Cited by 10 publications

(10 citation statements)

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“…Selective flocculation has been shown to be a promising technique for cleaning ultrafine coals and in some cases floe flotation has also provided encouraging results (Osborne, 1978, Soto andBarbery, 1988). Rubio and Kitchener (1977) described a hydrophobic flocculation process in which solids, either naturally hydrophobic or made hydrophobic by using surfactants, can be treated.…”

Section: 1mentioning

confidence: 99%

“…This was further confirmed by Osborne (1978) who used column flotation in the floe flotation experiments with sulphides. Soto and Barbery (1988) also used a column to float flocculated fine particles (in the range from 0.5 to 10 urn) of talc and coal among others. They used synthetic mixtures of minerals; for the coal-kaolinite system, either polyethylene oxide or polyacrylamide were used as flocculating agents.…”

Section: Floe Separationmentioning

confidence: 99%

“…Floe flotation gave better recoveries and grades than sedimentation based separation. Soto and Barbery (1988) pointed out that the hydrophobic character of the solids is essential for floc-flotation and that the character of the polymer is less important. This conclusion is obviously limited to the few flocculants which they investigated.…”

Section: Floe Separationmentioning

confidence: 99%

“…Floe separation techniques which avoid floe break up and mechanical entrainment should be studied. In this regard, the flotation of hydrophobic aggregates made of fine particles will require different hydrodynamic conditions from the ones prevailing in the mechanical flotation cells (Soto and Barbery, 1988). There are some indications that such favorable conditions could be created in a flotation columns.…”

Section: Recommendations-future Testsmentioning

confidence: 99%

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Effect of the properties of coal surface and flocculant type on the flocculation of fine coal

Palmes¹,

Laskowski²

1993

Mining, Metallurgy & Exploration

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Three coal samples, selected out of eight with well-characterized surface properties, were used in flocculation tests. A synthetic mixture of coal and silica was used in the selective flocculation experiments. The flocculants tested included: a hydrophilic polyacrylamide (PAM) and a semihydrophobic (F1029-D) flocculants and a totally hydrophobic latex prepared by emulsion polymerization (FR-7A). Good hydrophobic agglomeration and selectivity were observed with the totally hydrophobic latex on non-oxidized hydrophobic coal only; increased coal hydrophilicity clearly affected agglomeration and selectivity. For.the polyelectrolyte and the semihydrophobic flocculants, the flocculation vs. shear rate curves exhibited a maximum, while for the totally hydrophobic latex the degree of flocculation increased continuously over the whole tested range. The flocculation versus flocculant dosage curves displayed a maximum for the polyelectrolyte whereas for both semi-hydrophobic polymer and for the latex the degree of flocculation did not vary significantly beyond a certain dosage.Flocculation was found to be pH dependent: while better flocculation was observed in acidic solutions, better selectivity (deashing) was obtained in alkaline pH ranges. vii 7.2

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Section: 1mentioning

confidence: 99%

Section: Floe Separationmentioning

confidence: 99%

Section: Floe Separationmentioning

confidence: 99%

Section: Recommendations-future Testsmentioning

confidence: 99%

See 2 more Smart Citations

Effect of the properties of coal surface and flocculant type on the flocculation of fine coal

Palmes¹,

Laskowski²

1993

Mining, Metallurgy & Exploration

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“…To improve dewatering operations the industry uses flocculating agents. These are polyelectrolytes Selective flocculation has been shown to be a promising technique for cleaning ultrafine coals and in some cases floe flotation has also provided encouraging results (Osborne, 1978, Soto andBarbery, 1988). Rubio and Kitchener (1977) described a hydrophobic flocculation process in which solids, either naturally hydrophobic or made hydrophobic by using surfactants, can be treated.…”

Section: Chapter 1: Introductionmentioning

confidence: 99%

Effect of the properties of coal surface and flocculant type on the flocculation of fine coal

1995

Fuel and Energy Abstracts

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In presenting this thesis in partial fulfilment of the requirements for an advanced degree at the University of British Columbia, I agree that the Library shall make it freely available for reference and study. I further agree that permission for extensive copying of this thesis for scholarly purposes may be granted by the head of my department or by his or her representatives. It is understood that copying or publication of this thesis for financial gain shall not be allowed without my written permission.

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Is flotation the unavoidable way for beneficiating metal sulphide ores?

Cuyper

Lucion

1990

Sulphide Deposits—their Origin and Processing

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Separation of fine particles by floc flotation

Cited by 10 publications

References 3 publications

Effect of the properties of coal surface and flocculant type on the flocculation of fine coal

Effect of the properties of coal surface and flocculant type on the flocculation of fine coal

Effect of the properties of coal surface and flocculant type on the flocculation of fine coal

Is flotation the unavoidable way for beneficiating metal sulphide ores?

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