• concentration of iranian low grade zinc ore

    جزئیات بیشتر مقاله
    • تاریخ ارائه: 1389/07/20
    • تاریخ انتشار در تی پی بین: 1389/07/20
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     concentration of low grade zinc ore with average grade of 12% zn has been studied. due to increasing of reagents costs and environmental problems, hydrometallurgical methods on low grade ore are not economic. rather, the hydrometallurgical process on zinc concentrate, produced by gravity and flotation methods, can make economical utilization of this resource. the mineralogical studies indicated that the calcite and quartz are the main gangue minerals and the smithsonite as the main valuable zinc mineral of the ore. the liberation degree of smithsonite was determined 90 microns. by jigging tests on (-15+1) mm fraction, a concentrate grading of 29.5% zn and a recovery of 73.5% is obtained. a concentrate of the smithsonite containing 28.5% zn with a recovery of 68% can be obtained by the shaking table on -1 mm fraction. by flotation on a compound preconcentrate from gravity separation methods, a concentrate grading of 37.3% zn with a recovery of 93.6% is obtained. a flowsheet combining jigging, shaking table and flotation is suitable for obtaining a final concentrate grading of 37.3% zn and a total recovery up to 64%.

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