中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 34 No. 4 April 2024 |
（1. School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China;
2. Key Laboratory of Hunan Province for Clean and Efficient Utilization of Strategic Calcium-containing Mineral Resources, Central South University, Changsha 410083, China）
Abstract:Ammonium ion was introduced to enhance the sulfidization of heterogenite, the main cobalt oxide mineral. The flotation recovery was significantly improved from less than 20% to over 70%. Micro flotation and FT-IR analyses indicated that ammonium ions enhanced the adsorption intensity of xanthate and improved the flotation recovery of heterogenite. Zeta potential, ICP-OES, and XPS tests further illustrated that cobalt on the surface of heterogenite was transferred to the liquid phase by forming ammonia complexes, thereby increasing the sulfur adsorption sites on the mineral surface and promoting sulfidization. This study will contribute to a better understanding of the flotation behavior of heterogenite and provide a valuable reference for the efficient recovery of cobalt oxide ores.
Key words: heterogenite; ammonium activity; sulfidization flotation; cobalt oxide ore
