Hydrogen bubble fiotation of fine minerals containing calcium  

作　　者：Sun Wei Ma Liang Hu Yuehua Dong Yanhong Zhang Gang 

机构地区：[1]School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China

出　　处：《Mining Science and Technology》2011年第4期591-597,共7页矿业科学技术（英文版）

基　　金：National Natural Science Foundation of China (No. 51074184)

摘　　要：One characteristic of electro-flotation is the presence of micro bubbles that are well known for improving the flotation performance of fine particles. An electro-flotation method was studied with fine scheelite and fluorite particles sized into three different fractions. Experiments were performed in a modified Hallimond tube. We investigated the effects of gas holdup, particle size, and different mesh electrode apertures on mineral recovery. Flotation results show that two size fractions show increased flotation recovery as the gas holdup increases. For the sized scheelite and fluorite, the flotation effect is diverse for different sizes of the cathode aperture. Pictures of the bubbles taken by a high speed CCD were used to determine the hydrogen bubble size distribution generated as a function of collector, current density, and electrode size. The diameters of the hydrogen bubbles ranged from 12 to 117μm in alkaline conditions.One characteristic of electro-flotation is the presence of micro bubbles that are well known for improving the fiotation performance of fine particles.An electro-flotation method was studied with fine scheelite and fluorite particles sized into three different fractions.Experiments were performed in a modified Hallimond tube.We investigated the effects of gas holdup,particle size,and different mesh electrode apertures on mineral recovery.Flotation results show that two size fractions show increased flotation recovery as the gas holdup increases.For the sized scheelite and fluorite,the flotation effect is diverse for different sizes of the cathode aperture.Pictures of the bubbles taken by a high speed CCD were used to determine the hydrogen bubble size distribution generated as a function of collector,current density,and electrode size.The diameters of the hydrogen bubbles ranged from 12 to 117 lm in alkaline conditions.

关 键 词：Fine particles Scheelite Fluorite Electro-flotation 

分 类 号：TD923[矿业工程—选矿] X781.03[环境科学与工程—环境工程]