Froth Flotation (Sulphide & Oxide)

Froth Flotation (Sulphide & Oxide)2017-04-04T06:57:31-04:00
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the change in nature of the ZnS and PbS concentrate (2 replies)

Azadeh
1 year ago
Azadeh 1 year ago

Hi Dear friends

is it possible that the nature of the PbS and ZnS concentrates change during a period of 6 months or more? the concentrates are dumped in an open area with no cover.

thank you all

Jorge
1 year ago
Jorge 1 year ago
1 like by David

It is possible to expect some degree of oxidation. One of the key aspects is the weather conditions. For example a rainy place tend to increase the superficial alteration. The formation of surface films and their subsequent dissolution can be observed. Sphalerite particles can show a white hairy texture. The duration of each active or passive period  is a measure of time for which sulphides are dissolved or the dissolution is inhibited. The presence of pyrite in the concentrate is other point to consider.

Dave Tahija
1 year ago
Dave Tahija 1 year ago

If there is any pyrite in the concentrate and moisture is present, galena can react as the anode in a pyrite-galena galvanic cell. A recent description of the reaction is in:

http://www.minproc.pwr.wroc.pl/journal/pdf/ppmp53-2.846-858.pdf

This results in galena particles acquiring coatings of lead carbonate and lead sulphate.

 

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