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| Optimization of flotation process for a refractory mixed oxide-primary copper-molybdenum ore in Xizang |
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Received:December 10, 2024
Revised:February 14, 2025
Accepted:March 11, 2025
Published Online:April 30, 2026
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| DOI：10.3969/j.issn.1005-7854.2026.01.008 |
| KeyWord:refractory copper-molybdenum ore;mixed ore flotation;sulfidizing conditioning;regrinding separation;fine-grained molybdenite recovery |
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| 1.Zijin Mining Group Co., Ltd., Longyan 364200, Fujian, China;2.Xizang Xianglong Mining Co., Ltd., Shigatse City 857000, Xizang, China |
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| Abstract: |
| A refractory copper-molybdenum ore in Xizang consists of surface oxide ore and internal primary ore, with overall low grades of copper and molybdenum. The molybdenum-bearing minerals exhibit fine dissemination, and the surface oxide ore has a high copper oxidation rate, leading to significant challenges in comprehensive resource recovery. Addressing the ore characteristics and mining plan, this study explored beneficiation processes for separating the surface oxide ore and the internal primary ore. Based on experiences from similar mines, regional policy requirements on the Qinghai-Xizang Plateau, and systematic beneficiation test data, a blending strategy was finally recommended (controlling copper grade at approximately 0.40% and oxidation rate at about 10%). A flotation process of "sulfidizing conditioning–bulk copper-molybdenum flotation–regrinding separation" was established. Test results show that this process can effectively separate qualified copper concentrate and molybdenum concentrate. The copper concentrate contains over 25% copper and less than 0.1% molybdenum, with a copper recovery exceeding 89%. The molybdenum concentrate contains less than 1% copper and over 45% molybdenum, with a molybdenum recovery above 90%. This study achieved effective comprehensive recovery of this refractory copper-molybdenum resource, providing technical reference for the development and utilization of similar ore resources. |
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