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| Research progress and prospects in red mud dealkalization technology |
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Received:October 11, 2024
Revised:December 18, 2024
Accepted:December 25, 2024
Published Online:April 30, 2026
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| DOI：10.3969/j.issn.1005-7854.2025.06.004 |
| KeyWord:red mud;dealkalization;resource utilization;alkali regulation;solid waste |
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| 1.State Key Laboratory of Mineral Processing, Beijing 102628, China;2.Shen Kan Qinhuangdao General Engineering Design and Research Institute Corporation, MCC, Qinhuangdao 066004, Hebei, China;3.The Fifth Prospecting Team of Shandong Coal Geology Bureau, Ji'nan 250100, China;4.College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China |
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| Abstract: |
| Red mud is a highly alkaline solid waste generated by the alumina industry, and its high alkali content is a bottleneck restricting its large-scale resource utilization. This paper systematically analyzes the occurrence forms and environmental hazards of alkali in red mud, reviews the mechanisms and research status of mainstream dealkalization technologies, including physical methods, chemical methods (e.g., acid neutralization, salt/ion precipitation or replacement), and biological methods, and evaluates the advantages and disadvantages of each method. The analysis indicates that existing technologies still have limitations regarding cost-effectiveness, secondary pollution, or processing duration. Finally, this paper prospects that future research on red mud dealkalization should focus on developing short-process, low-cost, green, and efficient synergistic technologies, providing a reference for achieving the scaled treatment and ecological management of red mud. |
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