Flotation Separation of Hematite and Iron-containing Silicate Using Ammonium Hexafluorosilicate Depressant
Separation of hematite and iron-containing silicate gangue aegirine by Flotation using fatty acid collector and (NH4)2SiF6 depressant was investigated in this paper. The flotation tests with single minerals show Ammonium hexafluorosilicate (AHFS) is a selective depressant for aegirine in hematite flotation in weakly acidic medium, which can strongly reduce the flotation recovery of aegirine in the pH range of 4-5 while has no evident effect on the flotation of hematite. The results of flotation tests with actual ores show the separation of hematite from aegirine gangue by forth flotation was possible, and good selectivity was achieved. Chemisorptions were observed on aegirine mineral surface treated by AHFS solution by using SEM and IR spectrum measurements. On the basis of coordination chemistry, a comprehensive mechanism, which reasonably explains the selective depression of AHFS for iron-containing silicate, is also proposed.
Ammonium hexafluorosilicate Hematite Iron-containing silicate Flotation separation
G. J. Mei P. Rao Y. F. Yu
School of Resource and Environment Engineering, Wuhan University of Technology, Wuhan, 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
1255-1260
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）