Effect of Pb(II) on the flotation behavior of scheelite using sodium oleate as collector. (1st June 2019)

• Record Type: Journal Article
• Authors: Wang, Jizhen; Mao, Yong; Cheng, Yazhi; Xiao, Yuchen; Zhang, Yuxuan; Bai, Junzhi
• Is Part Of: Minerals engineering. Volume 136(2019)
• Page Start: 161
• Page End: 167
• Publication Date: 2019-06-01
• Subjects: Scheelite -- Flotation -- Lead ions -- Calcium ions -- Sodium oleate; Mines and mineral resources -- Periodicals; Ressources minérales -- Périodiques; Mines and mineral resources; Periodicals; Electronic journals; 622
• DOI: 10.1016/j.mineng.2019.03.012
• Languages: English
• ISSNs: 0892-6875

Abstract

Highlights: The presence of Pb(II) ions increases the recovery of scheelite. Pb-OL complex has a stronger collecting ability for scheelite than NaOL. Ca(II) can decrease the scheelite recovery using sodium oleate as a collector. Pb(II) can eliminate the adverse effect of calcium ions on scheelite flotation. Abstract: In this study, the effect of Pb(NO3 )2 on the flotation behavior of scheelite using sodium oleate (NaOL) as a collector in the presence and absence of Ca 2+ ions was investigated through the micro-flotation tests, solution chemistry calculation, zeta potential measurements, and FT-IR analysis. The micro-flotation results indicated that the addition of Pb(NO3 )2 or Pb-OL complex obviously improved the scheelite recovery, and eliminated the adverse effect of Ca 2+ ions on the scheelite flotation. The mechanism studies indicated that the addition of Pb(NO3 )2 improved the amount of adsorbed NaOL onto the scheelite surface, or react with NaOL in the solution to form the complexes of Pb(II) and NaOL, thus improved the scheelite recovery. The chemical reaction between Pb(NO3 )2 and NaOL was stronger than those of calcium ions and NaOL at pH 6–9.3, therefore, the addition of Pb(NO3 )2 could eliminate the adverse effect of calcium ions on the scheelite flotation. However, at pH > 9.8, Pb(OH)2 and Pb(OH)3 − were the main lead species. The chemical reaction between Pb(OH)2 or Pb(OH)3 − and NaOL was weaker than those of calcium ions and NaOL, hence cannot eliminate the adverse effect of calcium ions on the scheelite flotation.