首页|Adsorption behavior and mechanism of copper ions in the sulfidization flotation of malachite
Adsorption behavior and mechanism of copper ions in the sulfidization flotation of malachite
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Malachite is one of the main minerals used for the industrial enrichment and recovery of copper oxide resources,and copper ions are unavoidable metal ions in the flotation pulp.The microflotation,contact angle,and adsorption experiments indicated that pretreatment with an appropriate concentration of cop-per ions could improve the malachite recovery,and the addition of excess copper ions reduced the hydrophobicity of the malachite surface.The results of zeta potential tests indicated that sodium sulfide and butyl xanthate were also adsorbed on the surface of malachite pretreated with copper ions.X-ray photoelectron spectroscopy(XPS)results indicated that-Cu-O and-Cu-OH bonds were formed on the surface of the samples.After pretreatment with an appropriate concentration of copper ions,the number of-OH groups on the mineral surface decreased,whereas the number of Cu-S groups on the mineral surface increased,which was conducive to the sulfidization of malachite.After adding a high con-centration of copper ions,the-OH groups on the mineral surface increased,whereas the number of Cu-S groups decreased,which had an adverse effect on the sulfidization flotation of malachite.Time-of-flight secondary ion mass spectrometry showed that pretreatment with copper ions resulted in a thicker sul-fidization layer on the mineral surface.
Han Wang、Shuming Wen、Guang Han、Yongxin He、Qicheng Feng
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State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization,Faculty of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650093,China
State Key Laboratory of Mineral Processing,Beijing 100160,China
Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Mineral Resources,Kunming University of Science and Technology,Kunming 650093,China
Inter Mongolia Xingye Mining Company Limited,Chifeng 024028,China
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