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《Journal of Northeastern University(Natural Science)》 2009-01
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Effect of Aeration Quantity on Separation of Low-Grade Bauxite by Cyclone-Reverse Flotation

GAO Shu-ling1,WEI De-zhou1,FANG Ping1,CAO Hui-chang2(1.School of Resources & Civil Engineering,Northeastern University,Shenyang 110004,China;2.Shenyang Coal Design and Research Institute,Shenyang 110015,China.)  
Based on the characteristics of China's bauxite and cyclone separation,the cyclone-reverse flotation technique was experimentally carried out for the separation of low-grade bauxite,of which the w(Al2O3)/w(SiO2),abrasive size and mass fraction are 4.39,less than 0.074 mm and 61.90%,respectively. The effect of aeration quantity on separation process/indexes was investigated. The results showed that when the aeration quantity increases in the range from 0 to 4.0 m3/h,the envelope of zero vertical velocity will shrink around the axis,and make the separation indexes poorer.But with the same aeration quantity,the increasing feed pressure will be advantageous to the process of cyclonereverse flotation and make the separation indexes better.When the aeration quantity increases in the range from 0 to 0.8 m3/h,the envelope of zero vertical velocity shrinks slightly around the axis to weaken the classification effect on mineral particles due to size difference,but strengthen the separation effect on those particles due to the differences of density and surface properties,and at that time,the separation indexes are better than no aeration.
【Fund】: 国家重点基础研究发展规划项目(2005CB623701)
【CateGory Index】: TD95
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