Laboratory Testing & General Mineral Processing Engineering

Laboratory Testing & General Mineral Processing Engineering

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Removal of micron size free iron particles (3 replies and 3 comments)

A
MineralFrothFlotation
7 years ago
MineralFrothFlotation 7 years ago

Hello , Seeking solution for removal of micron size free iron particles from micronized limestone & china clay powder through dry processing.

Micronized limestone and china clay powder is having 0.2 to 0.5 % free Iron and requirement is =< 0.05 % Free iron in final product .

Equipment which can reduce the free iron particles through dry processing .

I tried with roller magnets and it is working well with coarse particles  , not with micronized as lot of powder got stick with the roller magnet belt conveyor and that results in coating formation on the belt . Even after clearing the coating lot of good material is also getting wasted and results are not achieved ( i.e Free iron content =< 0.05 %).

Pls. suggest .....

a
akhil999in
7 years ago
akhil999in 7 years ago
Like

Try adding low amplitude dither vibrations at about 400 Hertz or cycles per second to the powder mixture where the magnet acts on it.

It should help to avoid clogging the china clay. Attach an electromagnet with some electronic cards to generate vibration, preferably adjustable amplitude and frequency to optimise manually.

A
MineralFrothFlotation
7 years ago

Thanks Akhil , I think I should try this . Can you suggest any specific supplier for the same .

b
Robert
7 years ago
Robert 7 years ago
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Have you evaluated grate magnets, e.g.,

http://www.eriez.com/resources/content/en-us/documents/pdfs/Reprints/HowToChooseAndUseMetalSeparatorsPlasticsJan2013.pdf

 

 

A
MineralFrothFlotation
7 years ago

Yes Robert , I have taken trial with this type of magnets but not of M/s Eriez . Actually after a few second a layer of fine particles form over the magnets and because of that micronized iron particles move along with the product . This type of magnets are very effective with coarse iron particles .

b
Robert
7 years ago
Robert 7 years ago
Like

I've used with very fine particles of iron. However, functionality depends on the content of iron particles. Do you know iron content (% or count/mass) of your stream?

A
MineralFrothFlotation
7 years ago

micronized calcined china clay is having 0.5 % of free iron which use to come due to abrasion inside the MS pipe lines , ducts , cooler etc .

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