Study on Beneficiation of Low-grade Diasporic Bauxite in Cyclonic Centrifugal Field
Based on the differences in hardness and density of diaspore and aluminosilicate minerals which usually exist in Chinese diasporic bauxite, It is analysed that bauxite of this kind is difficult to be separated effectively by classification and normal gravity separation, and cyclonic centrifugal field was thus proposed to be carded out, in which classification can take place according to the size difference resulted from selective grinding, whats more, the separation function according to density difference is expected to take effect at the same time, and then cyclonic separation tests for diasporic bauxite of A/S 4.39 and grinding 61.90% -0.074mm were carried out tentatively. The results showed that the accretion of feed pressure can offer strong enough centrifugal force for cyclonic separation with result that separation function according to density difference is effectively intensified, by the increasing of this parameter, underflow and overflow of A/S 7.64 and 2.18 can be processed at the same time, and the recovery of Al2O3 in underflow is 71.78%; judging by the flow ratio, the spatial locality envelope of zero vertical velocity do constringe to the vertical axis by the enlarging of diameter ratio of apex to vortex, overflow and underflow of A/S 2.08 and 6.5-7.0 can be processed by controlling this structural parameter, which is possible to offer a technological method for low-grade bauxite to de-sliming beforehand.
Low-grade diasporic bauxite Cyclonic centrifugal field Density difference Separation function Envelope of zero vertical velocity Flow ratio
S. L. Gao D. Z. Wei J. T. Liu Y. T. Wang
School of Resources and Civil Engineering, Minerals Processing, Northeastern University, China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
1855-1860
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）