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Journal of Chemistry
Volume 2017 (2017), Article ID 9187436, 8 pages
Research Article

Treatment and Recycling of the Process Water in Iron Ore Flotation of Yuanjiacun Iron Mine

1School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
2Changsha Research Institute of Ming and Metallurgy Co., Ltd., Changsha 410012, China

Correspondence should be addressed to Hai-feng Xu; moc.621@5240gnefiahux

Received 23 May 2017; Accepted 4 July 2017; Published 8 August 2017

Academic Editor: Wenshan Guo

Copyright © 2017 Wen-li Jiang and Hai-feng Xu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Coagulating sedimentation and oxidation treatment of process water in iron ore flotation of Yuanjiacun iron mine had been studied. The process water of this mine carried residual polyacrylamide (PAM), poly(diallyldimethylammonium chloride) (PDADMAC), and Ca2+ from the flotation and caused decrease of the iron flotation recovery or grade of the concentrate. The studies on high-intensity magnetic separation (HIMS) tailings for coagulating sedimentation showed that the settling performance of coagulant (named CYH) was better than that of PDADMAC. The analyses of FTIR spectra and zeta potential demonstrated that CYH is adsorbed mainly through electrostatic attraction onto HIMS tailings. Sodium hypochlorite was adopted to oxidize the residual organics in tailings wastewater. When sodium hypochlorite is at the dosage of 1.0 g/L, reaction temperature is of 20°C, and reaction time is of 30 minutes, the removal rates of PAM, COD, and Ca2+ were 90.48%, 83.97%, and 85.00%, respectively. Bench-scale flotation studies on the treated tailings wastewater indicated that the iron recovery and grade of concentrate were close to those of freshwater.