Evaluation of sodium petroleum sulfonates with different molecular weights for flotation of kyanite ore
1
School of Resources and Environmental Engineering, Wuhan University of Technology
2
Wuhan University of Technology
Publication date: 2017-04-30
Corresponding author
Huimin Gao
Wuhan University of Technology, No.122 Luoshi Road, Hongshan District, 430070 Wuhan, China
Wuhan University of Technology, No.122 Luoshi Road, Hongshan District, 430070 Wuhan, China
Physicochem. Probl. Miner. Process. 2017;53(2):956-968
KEYWORDS
TOPICS
ABSTRACT
The flotation performance of sodium petroleum sulfonates with different molecular weights was evaluated for flotation of a kyanite ore, by investigating valuable mineral recovery-grade, flotation kinetics and gangue entrainment. The results indicated that the higher molecular weight of agent, the higher final cumulative kyanite recovery was, with the maximum value of 72% being obtained with KY-3 with the molecular weight of 438. The final cumulative kyanite grade initially increased, and then decreased with the molecular weight increasing. In other words, the maximum final cumulative kyanite grade (i.e. 89.05%) was obtained with KY-2 with the molecular weight of 392. The kyanite flotation kinetics followed the first order kinetics well, while the modified flotation rate constant showed a decreasing trend after the initial increase as the molecular weight increased. In addition, the overall entrainment degree decreased with decreasing molecular weight of sodium petroleum sulfonates. The use of KY-2 in kyanite flotation was an attractive option in comparison with KY-1 and KY-3.
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