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Year 2025
 
Vol 1, Issue 67, [12 - 2025] - Early View

Study and proposal of a flotation technology for Zinc Oxide Ore from the Cho Dien deposit

DOI:10.46326/JMES.2026.67(1).10

  • Affiliations:

    1 PhD student at Mining Faculty, Hanoi University of Mining and Geology, Hanoi, Vietnam
    2 Hanoi University of Mining and Geology, Hanoi, Vietnam
    3 MinPro Research Group, University of Mining and Geology, Hanoi, Vietnam

  • *Corresponding:
    This email address is being protected from spambots. You need JavaScript enabled to view it.
  • Received: 25th-Aug-2025
  • Revised: 8th-Dec-2025
  • Accepted: 28th-Dec-2025
  • Online: 31st-Dec-2025
Pages: 118 - 130
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Abstract:

In recent years, the rapid decline in both reserves and quality of domestic zinc sulfide ores-the primary raw material for zinc metal production in Vietnam-has posed significant challenges for the industry. This has made the development of alternative processing technologies for low-grade zinc oxide ores (5÷10% Zn) increasingly urgent. The Cho Dien deposit (Thai Nguyen province) hosts such ores, which are strongly weathered, fine-grained, and mineralogically complex, containing smithsonit, hemimorphit, and chalcophanite with goethite, clays, and carbonates as major gangue minerals. This study investigates flotation performance under different processing regimes, including desliming versus non-desliming, reagent schemes, and flotation machine types. Experimental results demonstrate that a reagent combination of Na₂S_Tan-X_Sep-X, combined with non-desliming, is more effective than conventional depressants and dispersants. Moreover, a comparison between conventional mechanical flotation and forced-air flotation cells (TankCell) shows that TankCell achieves a zinc concentrate grading 21.75% Zn with a recovery of 62.7% after a single cleaning stage, whereas mechanical flotation requires two cleaning stages to obtain a concentrate of 21.18% Zn at 62.5% recovery. These findings confirm that flotation is a technically feasible route for complex low-grade zinc oxide ores in Vietnam and provide a practical basis for industrial application.

How to Cite
Do, Q.Thu Thi, ., L.Van Pham and ., H.Viet Le 2025. Study and proposal of a flotation technology for Zinc Oxide Ore from the Cho Dien deposit (in Vietnamese). Journal of Mining and Earth Sciences. 1, 67 (Dec, 2025), 118-130. DOI:https://doi.org/10.46326/JMES.2026.67(1).10.
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