2012年（124）
分类： IT业界
2012-03-21 14:37:01
Scheelite ore beneficiation process according to the thickness of a single
grain embedded fabric flotation and re-election – flotation two kinds of
process, fine-grained disseminated in scheelite ore flotation process is
generally dominated by a single, coarse white cloth embedded tungsten Ore to
re-election – combined flotation process based.
Scheelite frequently with a
variety of sulfide minerals, commonly with molybdenite, chalcopyrite and pyrite.
First flotation beneficiation process sulfide ore, scheelite flotation after.
Scheelite flotation carried out in alkaline medium with sodium carbonate, sodium
hydroxide to adjust the pulp pH9 ~ 10.5. Commonly used inhibitors sodium
silicate, tannins, various phosphates. Collector commonly used sodium oleate,
Tal oil, oxidized paraffin wax soap, etc. These are blistering performance
collector, the flotation process is generally not coupled with the foaming
agent.
Scheelite flotation can have good, but often with similar floatability
fluorite, calcite, apatite, barite, and calcium, barium and other gangue mineral
paragenesis, the selection process more complicated. In order to improve the
scheelite flotation of gangue minerals with calcium-selective, more commonly
used metal salts such as ferrous sulfate, etc., mixed with sodium silicate to
improve the scheelite flotation effect. Scheelite at room temperature with
strong stirring lime can improve the shear flocculation of fine scheelite and
fluorite, calcite and other gangue minerals selective separation. In order to
avoid the loss of tungsten, refractory to ensure high recovery of scheelite ore,
first select low-grade (15% ~ 30% WO3) concentrate, and then chemically treated
to produce synthetic scheelite or APT.
Of WO3 tungsten fine mud content is
higher than ore, metal share about 15%. Most tungsten metal recovery fine mud
processing plant less than 50%. Sorting using tungsten fine mud shaker, belt
chute with centrifugal concentrator. Single-use shaker sorting tungsten fine
mud, the recovery rate is low. Since the 1960s the use of centrifugal
concentrator, centrifugal ore – flotation, high intensity magnetic separation –
flotation beneficiation process to make tungsten fine joint cement processing
operations recovery rate of 10% to 20%.
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