| Improved hemimorphite flotation using xanthate as a collector with S(Ⅱ) and Pb(Ⅱ) activation |
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| 作者姓名： | Kai Jia Qi-ming Feng Guo-fan Zhang Qing Shi Yuan-jia Luo Chang-bin Li |
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| 作者单位： | School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China |
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| 摘 要： | The flotation of hemimorphite using the S(Ⅱ)–Pb(Ⅱ)–xanthate process, which includes sulfidization with sodium sulfide, activation by lead cations, and subsequent flotation with xanthate, was investigated. The flotation results indicated that hemimorphite floats when the S(Ⅱ)–Pb(Ⅱ)–xanthate process is used; a maximum recovery of approximately 90% was obtained. Zeta-potential, contact-angle, scanning electron microscopy–energy-dispersive spectrometry (SEM–EDS), and diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS) measurements were used to characterize the activation products on the hemimorphite surface and their subsequent interaction with sodium butyl xanthate (SBX). The results showed that a ZnS coating formed on the hemimorphite surface after the sample was conditioned in an Na2S solution. However, the formation of a ZnS coating on the hemimorphite surface did not improve hemimorphite flotation. With the subsequent addition of lead cations, PbS species formed on the mineral surface. The formation of the PbS species on the surface of hemimorphite significantly increased the adsorption capacity of SBX, forming lead xanthate (referred to as chemical adsorption) and leading to a substantial improvement in hemimorphite flotation. Our results indicate that the addition of lead cations is a critical step in the successful flotation of hemimorphite using the sulfidization–lead ion activation–xanthate process.
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| 关 键 词： | hemimorphite sulfidization lead ion activation xanthate zeta potential DRIFTS |
Improved hemimorphite flotation using xanthate as a collector with S(II) and Pb(II) activation |
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| Kai Jia,Qi-ming Feng,Guo-fan Zhang,Qing Shi,Yuan-jia Luo,Chang-bin Li.Improved hemimorphite flotation using xanthate as a collector with S(II) and Pb(II) activation[J].International Journal of Minerals,Metallurgy and Materials,2018,25(8):849-860. |
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| Authors: | Kai Jia Qi-ming Feng Guo-fan Zhang Qing Shi Yuan-jia Luo Chang-bin Li |
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| Affiliation: | 1.School of Mineral Processing and Bioengineering,Central South University,Changsha,China |
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| Abstract: | The flotation of hemimorphite using the S(Ⅱ)–Pb(Ⅱ)–xanthate process, which includes sulfidization with sodium sulfide, activa-tion by lead cations, and subsequent flotation with xanthate, was investigated. The flotation results indicated that hemimorphite floats when the S(Ⅱ)–Pb(Ⅱ)–xanthate process is used; a maximum recovery of approximately 90％ was obtained. Zeta-potential, contact-angle, scanning electron microscopy–energy-dispersive spectrometry (SEM–EDS), and diffuse-reflectance infrared Fourier transform spectroscopy (DRIFTS) measurements were used to characterize the activation products on the hemimorphite surface and their subsequent interaction with sodium butyl xanthate (SBX). The results showed that a ZnS coating formed on the hemimorphite surface after the sample was conditioned in an Na2S solution. However, the formation of a ZnS coating on the hemimorphite surface did not improve hemimorphite flotation. With the sub-sequent addition of lead cations, PbS species formed on the mineral surface. The formation of the PbS species on the surface of hemimor-phite significantly increased the adsorption capacity of SBX, forming lead xanthate (referred to as chemical adsorption) and leading to a sub-stantial improvement in hemimorphite flotation. Our results indicate that the addition of lead cations is a critical step in the successful flota-tion of hemimorphite using the sulfidization–lead ion activation–xanthate process. |
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