The Activation Mechanism of Bi3+ Ions to Rutile Flotation in a Strong Acidic Environment

作者：Xiao, Wei; Cao, Pan; Liang, Qiannan; Peng, Hong; Zhao, Hongbo; Qin, Wenqing; Qiu, Guanzhou; Wang, Jun^*

来源：Minerals, 2017, 7(7): 113.

DOI：10.3390/min7070113

• rutile activation flotation
• styryl phosphoric acid
• Strong acidic environment
• activation sites
• hydroxyl compound

Lead hydroxyl compounds are known as rutile flotation of the traditional activated component, but the optimum pH range for flotation is 2-3 using styryl phosphoric acid (SPA) as collector, without lead hydroxyl compounds in slurry solution. In this study, Bi3+ ions as a novel activator was investigated. The results revealed that the presence of Bi3+ ions increased the surface potential, due to the specific adsorption of hydroxyl compounds, which greatly increases the adsorption capacity of SPA on the rutile surface. Bi3+ ions increased the activation sites through the form of hydroxyl species adsorbing on the rutile surface and occupying the steric position of the original Ca2+ ions. The proton substitution reaction occurred between the hydroxyl species of Bi3+ ions (Bi(OH) n +(3 n)) and the hydroxylated rutile surface, producing the compounds of Ti-O-Bi2+. The micro-flotation tests results suggested that Bi3+ ions could improve the flotation recovery of rutile from 61% to 90%, and from 61% to 64% for Pb2+ ions.

• 出版日期2017-7
• 单位中南大学