矿产保护与利用2023，Vol.43Issue(6)：86-94,9.DOI:10.13779/j.cnki.issn1001-0076.2023.06.010
铅离子协同苹果酸抑制滑石可浮性的机理研究
Inhibition Mechanism of Lead Ions Synergized with Malic Acid on Talc
摘要
Abstract
Talc is a common co-occurring mineral of metal sulfide ores such as molybdenite,with excellent natural hydrophobicity.To elucidate the mechanism of flotation behavior of talc under the action of Pb ions and malic acid when kerosene is used as a collector,single mineral flotation tests of talc were carried out,and the adsorption mechanism of the reagents on the surface of talc was investigated by ζ-potential,XPS and FTIR.The results showed that the inhibition of talc by 1.0×10-3 mol/L malic acid was the most significant when the pH was 8 and the Pb2+ concentration was 1.0×10-4 mol/L.The recovery of talc was 54.60%,which was 32.50 percentage lower than that without inhibitors and 11.66 percentage lower than that of malic acid alone.The hydroxyl complex of lead ions in solution,Pb(OH)2,Pb(OH)3-and C4H4O52-with strong hydrophilicity could be adsorbed on the surface of talc,and their combined effects shifted the surface potential of talc negatively,which was unfavorable to the adsorption of kerosene.Malate ions eroded the talc surface and reacted with the active Mg ion site on talc surface to generate hydrophilic magnesium malate,which could significantly improve the hydrophilicity of talc and change its contact angle from 64.27° to 39.87°.The research can provide significant reference for the efficient flotation separation of talc-containing minerals.关键词
滑石/苹果酸/铅离子/协同抑制/可浮性Key words
talc/malic acid/lead ion/cooperative suppression/floatability分类
矿业与冶金引用本文复制引用
桂婉婷,雷大士,王宇斌,张帅,赵鑫,田家怡..铅离子协同苹果酸抑制滑石可浮性的机理研究[J].矿产保护与利用,2023,43(6):86-94,9.基金项目
国家自然科学基金(52304192,51974218) （52304192,51974218）
中国博士后科学基金(2022MD723813) （2022MD723813）
