Liu S.-J.,The State Key Laboratory of Comprehensive Utilization of Low Grade Ores |
Liu S.-J.,Central South University |
Qin W.-Q.,The State Key Laboratory of Comprehensive Utilization of Low Grade Ores |
Qin W.-Q.,Central South University |
And 4 more authors.
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | Year: 2013
The relationship between the flotation and potential of single mineral was studied by potential control flotation and cyclic voltammetry method, the range of pyrite flotation potential was measured, and the φ-pH-c diagram of pyrite in different environments was drawn. The results show that when the initial potential of the reaction between pyrite and xanthate is about 0.1 V; and when the electrical potential is between 0.1 and 0.3 V, the reaction is controlled by surface electron transfer step; yet when the electrical potential is over 0.3 V, the mass transfer process is the dominate step. Pyrite can electro-catalyze the oxidation of xanthate. The adsorption of xanthate on pyrite surface is the control step of the whole reaction, and grinding and mixing may affect the reaction between pyrite and collector.