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Post by Malcolm Firth on Mar 31, 2006 10:34:38 GMT
I have just read a paper by J. Watson in MEI's Proceedings of Magnetic, Electrical and Gravity Concentration '06. He states that magnetic separation finds its biggest use in the minerals industry.
I was surprised by this. I have always thought that it was a little used process, compared with, say flotation, and wondered why it is not used more, as all minerals have different degrees of magnetic susceptibility.
Is it a matter of capital and operating costs?
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Post by Misty on Apr 11, 2006 19:40:44 GMT
Actually, in some mineral applications, the flotation step is being replaced with magnetic separation because of its low capital cost (by comparison) and the reduced operating costs of cutting out reagents and low power requirements. Also, in a day where environmental concerns greatly affect business decisions, not using reagents is a welcome choice. Still, the processing decision is dictated by the nature of the deposit and the know how of the flowsheet developer. Magnetic susceptibility is, unfortunately, not the only element to dictate the most appropriate process - hence why there are so many means for processing and no two processing plants are alike. There is no simple answer, but Watson is correct when he states that magnetic separators are widely used in processing minerals – and you are correct in your interpretation of why they are a good choice. Outokumpu Technology did a good job of covering this issue by looking at glass sand processing. See the second article for some cost comparison tables for flotation vs. magnetic separation: www.outokumputechnology.com/28516.epibrw |
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Post by paulwolfs on Dec 22, 2006 14:09:04 GMT
We have just finished a simple test with magnetic separation of magnetisable particles from a silicon solution. Given the chance, we shall have to do a field test with a 25 m³/hr separator to define the efficiency but the results sofar are promishing. As all magnetic separators are positive separators and not absolute, particles will slip through and secondary treatment remains necessary. Only now the bulk has been removed leaving the very fine fraction for further treatment. We can handle flowrates upto 400 m³/hr within our standard range of separators originally designed for the separation of micron size ferritic particles in automobile production paint lines.
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Post by malcolmfirth on Dec 24, 2006 9:01:57 GMT
Sorry Paul but I fail to see the relevance of your 'reply' to my original question.
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Post by mtseparator on Apr 8, 2011 8:18:37 GMT
magnetic separator is necessary in some mineral separation, Different mineral character is different
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Post by mtseparator on Apr 10, 2011 9:58:53 GMT
The following is some introduction of drum magnetic separators
magnetic drum separator includes wet drum separator for mine and for coal, with the magnetic field intensity adjustable from 600GS to 5500GS for the different mines, different separating stages, or other specific demands. It could be used for different separating stages. Adopting high performance, high coercive force ferrite material and NdFeB materials.
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Post by mtseparator on Apr 10, 2011 9:59:26 GMT
wish these informations will be useful for you
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