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<p>The flotation tailings from the Panlong lead–zinc operation contain barite, with grades ranging from 15 to 20% BaSO<sub>4</sub>, along with minor amounts of pyrite. To promote efficient resource utilization and prolong the service life of the tailings pond, this study proposes the use of a pilot-scale agitated reflux classifier as the primary device for the pre-concentration of barite in these tailings. This novel gravity separation device is characterized by exceptionally low water and energy consumption. The equipment effectively and economically enhances the grade of barite, providing a viable feed material for subsequent purification processes. After 1&#xa0;week of continuous operation, the flotation tailings, following desliming, classification, and screening, produced a concentrate with an average BaSO<sub>4</sub> grade of 51.27% and an Fe grade of 9.99%. This resulted in a BaSO<sub>4</sub> recovery of 85.18% and an Fe recovery of 67.92%. The process successfully achieves the co-enrichment of barite and pyrite, highlighting the potential for significant improvements in resource recovery and efficiency. The stability and feasibility of using the pilot-scale agitated reflux classifier for the pre-enrichment of barite have been verified.</p>

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A Pilot Scale Study of Recovery Ultra-Fine and Low-Grade Barite Using the Agitated Reflux Classifier

  • 期刊论文

  • 发表日期：

    2025年5月6日

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  • Zhenqiang Liu,
  • Dongfang Lu,
  • Yuhua Wang,
  • Yuxin Zhang,
  • Yifei Liu

摘要

The flotation tailings from the Panlong lead–zinc operation contain barite, with grades ranging from 15 to 20% BaSO4, along with minor amounts of pyrite. To promote efficient resource utilization and prolong the service life of the tailings pond, this study proposes the use of a pilot-scale agitated reflux classifier as the primary device for the pre-concentration of barite in these tailings. This novel gravity separation device is characterized by exceptionally low water and energy consumption. The equipment effectively and economically enhances the grade of barite, providing a viable feed material for subsequent purification processes. After 1 week of continuous operation, the flotation tailings, following desliming, classification, and screening, produced a concentrate with an average BaSO4 grade of 51.27% and an Fe grade of 9.99%. This resulted in a BaSO4 recovery of 85.18% and an Fe recovery of 67.92%. The process successfully achieves the co-enrichment of barite and pyrite, highlighting the potential for significant improvements in resource recovery and efficiency. The stability and feasibility of using the pilot-scale agitated reflux classifier for the pre-enrichment of barite have been verified.