中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 34 No. 2 February 2024 |
（1. State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming 650093, China;
2. Yunnan Key Laboratory of Green Separation and Enrichment of Strategic Mineral Resources, Kunming University of Science and Technology, Kunming 650093, China;
3. Inner Mongolia Xingye Mining Company Limited, Chifeng 024028, China）
Abstract:The sulfidization performance and mechanism of hemimorphite surface in a sodium sulfide (Na2S) system were revealed, and surface sulfidization products were identified through various analytical methods. The results showed that Na2S concentration had a significant effect on the sulfidization of the hemimorphite surface. An increase in Na2S concentration could promote the interaction between S species in the pulp and mineral surfaces, thereby increasing the content of sulfidization products and hydrophobicity of hemimorphite surface. XPS and ToF-SIMS analyses showed that the sulfidization product was not the sole monosulfide on hemimorphite surfaces and it was composed of monosulfide (S2-) and polysulfide (Sn2-). The content of polysulfide on mineral surface increased with an increase in the Na2S concentration, which improves the activity of sulfidization products on hemimorphite surface.
Key words: sulfidization performance; hemimorphite; Na2S concentration; zinc sulfide species; polysulfide
