Abstract
Iron ore tailings (IOTs) are an important solid waste in the mining industry, which can pollute the environment and endanger human health. However, the disposal and high value-added utilization of iron tailings have always been a challenge. Notably, superconducting high-gradient magnetic separation (S-HGMS) technology is a promising technology in mineral processing with the advantages of low carbon, green, high efficiency, and easy operation. This study used S-HGMS technology to separate and purify SiO2 concentrate from IOTs. Under the optimal conditions of magnetic flow ratio of 0.038 T s/m for the first magnetic separation, 0.085 T s/m for the second, pulp flow rate of 0.5 L/min, and pulp concentration of 50 g/L, increasing the SiO2 content from initial 61.38% to 95.23%, SiO2 recovery reached 38.51%. After the S-HGMS process, weak and non-magnetic particles realized effective separation, which created the conditions for the subsequent processing of SiO2 concentrate into high-purity silica. S-HGMS technology was used to extract SiO2 particles from IOTs, improving the utilization value of the tailings. This study provides an efficient and eco-friendly research direction for the industrial application of IOTs.
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The authors thank the Shiyanjia Lab (www.shiyanjia.com) for the VSM and XRF analysis.
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Zhang, A., Yang, X., Li, C. et al. Resource Utilization of Iron Ore Tailings to Recover SiO2 Sand Through S-HGMS: Parametric Optimization and Mechanism Analysis. JOM 76, 2392–2402 (2024). https://doi.org/10.1007/s11837-024-06447-z
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DOI: https://doi.org/10.1007/s11837-024-06447-z