In upgrading lean tungsten ore, gravity concentration by jigging of vein qu
artz produced a pre-concentrate containing 4.5% WO3. For further upgrading
the pre-concentrate, beneficiation studies were conducted with an objective
of obtaining a product analysing > 65% WO3 with less than 1% impurities of
SiO2 and S each. The sample contained quartz, topaz and iron sulphides as
gangue. The study presented in this paper has shown that a further pre-conc
entration to remove topaz is necessary for improving efficiency of downstre
am separation process and to achieve desired product. Results of enrichment
studies using -200# ground sample have also been discussed. Desired produc
t could be obtained by pre-concentration of the jig pre-concentrate by tabl
ing followed by flotation at -200# and vanning of flotation tailing. (C) 20
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