Lead species formation on pure hemimorphite surface and its performance for subsequent sulfidization

• Autorzy: Liang Guanyu , Zhang Song , Xian Yongjun , Chen Luzheng

Identyfikatory

DOI

10.37190/ppmp/187064

• Języki publikacji: EN

Abstrakty

EN

Hemimorphite is important-supplementary resource for the commercial zinc production, but it easy loses into tailings due to extreme difficulty for its surface sulfidization. Adding active metal ions after sulfidization have been widely proposed for enhancing hemimorphite floatability, but its desired efficiency in flotation practice has not yet been completely achieved caused by the instability of sulfide layer. Whereas pre-adsorption of active metal ions to modify the hemimorphite surface has strong potential to make up for this shortcoming. Herein, the feasibility and appropriate environment of free Pb²⁺ for modifying the pure hemimorphite surface was evaluated. Subsequently, the performance of Pb²⁺ adsorption for enhancing sulfidization stability and floatability of hemimorphite were investigated. The X-ray photoelectron spectroscopy results indicated that the Pb²⁺ adsorption on hemimorphite surface was achieved through the Pb ions displacement for Zn ions, and it was bond to oxygen-containing groups on hemimorphite surface. Such adsorption was strengthened with the increasing of solution pH, owing to the abundant Pb hydroxyl species precipitated on mineral under alkaline conditions, in term of the results of visual MINTEQ modeling and time-of-flight secondary-ion mass spectrometry. In addition, the X-ray photoelectron spectroscopy results showed dominant Pb hydroxyl species further reacted with sulfur during subsequent sulfidization to generate much more S species than that of without Pb²⁺ pre-modification. Meanwhile, such sulfide layer composed by Pb²⁺ on the mineral surface presented much higher stability than Zn-S species, which was verified via adsorption and desorption tests. As a result, the sulfidization and flotation recovery of hemimorphite increased after Pb²⁺ pre-adsorption.

Słowa kluczowe

EN

hemimorphite; lead ions adsorption; hydroxy lead; sulfidization; xanthate flotation

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2024
• Tom: Vol. 60, iss. 2
• Strony: art. no. 187064
• Opis fizyczny: Bibliogr. 36 poz., tab., wykr.

Twórcy

autor

Liang Guanyu

• Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China

autor

Zhang Song

• Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
• State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China

autor

Xian Yongjun

• Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China
• State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science and Technology, Kunming 650093, China

autor

Chen Luzheng

• Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China

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