Effects of different factors during the de-silication of diaspore by direct flotation  

作　　者：Huang Gen Zhou Changchun Liu Jiongtian 

机构地区：[1]School of Chemical Engineering and Technology, China University of Mining & Technology, Xuzhou 221116, China

出　　处：《International Journal of Mining Science and Technology》2012年第3期341-344,共4页矿业科学技术学报（英文版）

基　　金：financial support from the National Key Technology R&D Program in the 11th Five Year Plan of China (No. 2008BAB31B02);the National Natural Science Foundation of China (No. 51174205)

摘　　要：Most of the bauxite resources in China are kaolinite-diaspore bauxite of middle to low grade, with a fine dissemination, and are difficultly separated. Direct flotation de-silication has been shown to be an effec- tive method for de-silication of diaspore. In this study the effect of different factors, including pulp tem- perature, density, pH value, depressant, and collector dosage, on direct flotation of diaspore were investigated by laboratory experiments. The optimum conditions were identified and the flotation perfor- mance was improved. The results show that under optimum conditions （a pulp temperature around 40℃, a pulp density from 30% to 33g, a pH value from 9.0 to 10.0, an air flow rate of 0.5 m3/（m2 rain）, a dispersant level from 35 to 70 g/t, and a collector level around 1000 g/t） an AI/Si ratio of 6.97 is obtained starting from an initial Al/Si ratio of about 4.71. The recovery of A1203 under these conditions was 86.94%.Most of the bauxite resources in China are kaolinite-diaspore bauxite of middle to low grade, with a fine dissemination, and are difficultly separated. Direct flotation de-silication has been shown to be an effective method for de-silication of diaspore. In this study the effect of different factors, including pulp temperature, density, pH value, depressant, and collector dosage, on direct flotation of diaspore were investigated by laboratory experiments. The optimum conditions were identified and the flotation performance was improved. The results show that under optimum conditions (a pulp temperature around 40 °C, a pulp density from 30% to 33%, a pH value from 9.0 to 10.0, an air flow rate of 0.5 m3/(m2 min), a dispersant level from 35 to 70 g/t, and a collector level around 1000 g/t) an Al/Si ratio of 6.97 is obtained starting from an initial Al/Si ratio of about 4.71. The recovery of Al2O3 under these conditions was 86.94%.

关 键 词：DiasporeDirect notationDe-silicationFlotation conditions 

分 类 号：TD942.3[矿业工程—选矿] TF821[冶金工程—有色金属冶金]