Gravity Separation & Concentration Methods

Gravity Separation & Concentration Methods2017-04-04T06:57:23-04:00
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Removal of mica from +63-315 micron sand (5 replies and 1 comment)

2 years ago
Romain CADENAT 2 years ago

Dear All 

I want to remove mica fram a +63-315µm sand. 

If possible I would like to do it without flottation, is it possible to do it with hydroclassifier (counter-current washer like floatex, hydrosizer or lavodune) ? 

Or with spiral  classifier ? 

Something else ? 

I know that this can be done by flotation. What kind of reagent should I use ? 

Kind regards

2 years ago
mtztaj 2 years ago

as general

very simple to remove (mica) by gravity separation devises.


2 years ago

Thank for your reply. Which method is best ? we planned to do pilot test.

Treve Mildren
2 years ago
Treve Mildren 2 years ago
1 like by David

Hi Romain What are the SG's of the materials you are trying to separate? Roughly the SG of Mica is 2.8 to 3.0. Is the sand heavier or lighter ? I suspect that they are quite close so you might need to use some form of enhanced gravity device such as the Multi Gravity Separator (MGS) to highlight the SG differential.

2 years ago
Romain CADENAT 2 years ago

Thank you Treve

The SG is almost the same for the 2 minerals, 2.65 for sand and 2.7 to 3 for mica. I think the difference is too low for gravity method.

2 years ago
David 2 years ago

If this is dry already, have you considered electrostatic separation?

2 years ago
Romain CADENAT 2 years ago

Hello David

Sorry, I was not clear enough. This is wet. A fellow engineer made some test in the past with wet magnetic separator and the results was poor. Also I worry about cost of these equipment. The product on which I would like to remove mica is only a by-product.

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