The surface oxidation of pyrite in alkaline solution |
| |
Authors: | E. Ahlberg K. S. E. Forssberg X. Wang |
| |
Affiliation: | (1) Department of Inorganic Chemistry, Chalmers University of Technology and University of Göteborg, S-412 96 Göteborg, Sweden;(2) Division of Mineral Processing, Luleå University of Technology, S-951 87 Luleå, Sweden |
| |
Abstract: | The collector-less flotation of pyrite has been studied by conventional techniques and is correlated to the electrochemical behaviour of pyrite in alkaline solution (1m NaClO4, pH 11). It was concluded that the initial oxidation of pyrite produces a hydrophobic sulphur rich surface together with hydrophilic iron hydroxide species. Also upon grinding, the surface is covered by hydrophilic species and therefore no significant flotation was obtained in the absence of a collector. However, collectorless flotation was readily obtained in an iron complexing solution like EDTA. This indicates that the remaining sulphur-rich layer is responsible for the floatability of pyrite under these conditions. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|