Abstract
A new method of solid-phase reduction magnetic separation with pyrite as a reducing agent was proposed in order to realize resource utilization of high iron bauxite residue while reducing environmental harm. FeS2 powder and high iron bauxite residue powder were uniformly blended and roasted in a closed environment. A magnetic separator was utilized to separate the magnetic iron concentrate at 2400 GS, and the recovery rates were calculated. Experimental results show that the best iron recovery was 91.5% at 1:6 roasted bauxite: residue at 800℃ for 2 h. The recovery of Fe can be improved by reducing high iron bauxite residue with pyrite, and iron in both pyrite and high iron bauxite residue can be recovered simultaneously, alleviating the pressure of iron ore resources and improving its utilization value.
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Funding
Funding was provided by the National Natural Science Foundation of China (Nos. U1710257, 51874078, U1202274), the State Key Laboratory of Pressure Hydrometallurgical Technology of Associated Nonferrous Metal Resources (YY2016006), the Fundamental Research Funds for the Central Universities of China (N2025038), and the Shenyang Science and Technology Project (17-500-8-01, Z18-5-022).
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Fu, H., Lv, G., Zhang, Ta. et al. Study on Iron Extraction from High Iron Bauxite Residue by Pyrite Reduction. Bull Environ Contam Toxicol 109, 149–154 (2022). https://doi.org/10.1007/s00128-022-03520-8
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DOI: https://doi.org/10.1007/s00128-022-03520-8