Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide) 2017-04-04T06:57:31+00:00
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Flotation of Rare Earths (4 replies)

Maya Rothman
1 year ago
Maya Rothman 1 year ago

I want explanation in ore processing of flotation of rare earths ore monazite ex which adequate collector and which depressing for minerals of gangue to knowing oxides, carbonates silica and apatite.

And another question how of extracting monazite from apatite?

Ace Levy
1 year ago
Ace Levy 1 year ago

Search internet & look at Chelgani et al., A review of rare earth minerals flotation: Monazite and xenotime, Int J Mining Sci and Tech (2015).

This paper reviews rare earth minerals (monazite and xenotime) separation by flotation. A wide range of monazite and xenotime flotation test results are summarized including: reasons of variation in the point of zero charges on these minerals, the effects of various flotation conditions on zeta potential of monazite and xenotime, interactions of collectors and depressants on the surface of these minerals during flotation separation, relationship between surface chemistry of the minerals and different types of collector adsorptions and effects of the conditioning temperature on flotation of rare earth minerals. This review collects various approaches for the selective separation of monazite and xenotime by flotation and gives perspectives for further research in the future.

1 year ago

Hydroxamic acids and sodium oleate are the advisable collectors for the flotation of monazite.

Rahil Khan
1 year ago
Rahil Khan 1 year ago

Monazite can be floated using oleic acid, sodium oleate in the pH region of around 7-11. Other advisable collectors are hydroxamates, Tall Oil Fatty Acids, acintols, and carboxylic collectors. You may need to use this with some modifiers/depressants like sodium sulphide, sodium silicate etc.

Ace Levy
1 year ago
Ace Levy 1 year ago

Selective flotation of the monazite is the difficult part.

Use of either of these collectors works well. However, they are also great collectors for many of the commonly associated gangue minerals. The difficulties I have experienced lie in:

•Selection of depressant and its correct dosing to maintain selectivity and

• Prior attrition scrubbing to create clean surfaces for conditioning and flotation. Often the particles in beach sands are coated with inorganic and/or organic materials of greatly varying composition. 

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