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铅锌浮选尾矿综合利用试验研究

Experimental study on comprehensive utilization of lead−zinc flotation tailings

  • 摘要: 铅锌浮选尾矿产量大,其不能完全充填采空区,存在处置问题,因此铅锌浮选尾矿的高效资源化利用具有重要意义。以某铅锌浮选尾矿为研究对象,探索了适合其的综合利用途径。对铅锌浮选尾矿的性质进行分析,包括危险特性、一般工业固体废物分类、放射性核素鉴定等,均符合使用要求。通过旋流器分级浓缩后,将铅锌浮选尾矿制成烘干砂,然后按照一定比例混合制备水泥基自流平砂浆和胶粘剂。结果表明:所制备的烘干砂各项指标均符合标准要求,碱活性无潜在危害,可作为建筑用砂使用;水泥基自流平砂浆和胶粘剂分别符合相应产品的国家/行业标准,放射性符合A类装饰装修材料要求,产品中有害物质含量符合相关限值要求;并且具有显著的市场潜力。该研究成功解决了铅锌浮选尾矿作为水泥基自流平砂浆和胶粘剂的综合利用问题,为铅锌浮选尾矿的资源化处置提供了切实可行的技术方案,对推动有色金属尾矿综合利用产业的发展起到了积极作用。

     

    Abstract: The amount of lead−zinc flotation tailings is large, and the tailings cannot fully fill the gob, resulting in disposal problems. Therefore, the efficient resource utilization of lead−zinc flotation tailings is of great importance significance. By taking lead−zinc flotation tailings as the research object, a comprehensive utilization path suitable for lead−zinc flotation tailings was explored. The properties of lead−zinc flotation tailings, including hazardous characteristics, classification of general industrial solid waste, and identification of radionuclides, were analyzed, all of which met the requirements for use. Drying sand was made from lead−zinc flotation tailings flotation by fractional concentration, and then cement-based self-leveling mortar and adhesive were prepared according to a certain proportion. The results show that all the indexes of the prepared drying sand meet the standard requirements, and the alkali activity has no potential harm, so it can be used as construction sand. Cement-based self-leveling mortar and adhesive meet the national industry standards of corresponding products, respectively, and the radioactivity meets the requirements of Class A; the content of hazardous substances in the products meets the relevant limit requirements and has significant market potential. The study successfully solves the problem of comprehensive utilization of lead−zinc flotation tailings as cement-based self-leveling mortar and adhesive, provides a practical technical scheme for resource disposal of lead−zinc flotation tailings, and plays a positive role in promoting the development of the comprehensive utilization industry of non-ferrous metal tailings.

     

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