Abstract
Tungsten residues contain abundant valuable minerals that are difficult to be recovered by traditional gravity and flotation process.This study presents a route, centrifugal concentration for cassiterite recovery from tungsten residues through centrifugal concentrator. There were separated to three size fractions by experiment of elutriation using rotary flow analyser and cassiterite was observed by polarizing microscope and X-ray diffraction analysis. Results showed that after closed-circuit experiment of centrifugal concentration in the condition of roughing rotate speed of 850rpm, pulp mass concentration of 15%, washing water flow rate of 2L/S and concentrating rotate speed of 550rpm, the grade and recovery of Sn were 18.63% and 82.17% respectively. After closed-circuit experiment, Sn recovery of size fraction was calculated. Sn recovery of size fraction was 97.93% in size fraction of -37+20um, 82.94% in size fraction of -20+10um and 66.49% in size fraction of -10um. This study demonstrates that the centrifugal concentration provides a promising process for the recovery of cassiterite from tungsten residues.
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