Lead zinc mine tailings contain a large amount of valuable metals and non-metallic elements. If effectively reused, it can not only reduce resource waste but also reduce environmental pollution. The following are some common methods for reusing lead-zinc mine tailings:
Reflotation method: The valuable metal elements such as lead and zinc that have not been recovered from the tailings of lead-zinc mines are refloated. Reflotation usually requires pre-treatment of tailings, such as adding an appropriate amount of reagents, adjusting flotation conditions, etc. The re flotation method can improve the recovery rate of valuable metals, but the production cost is relatively high.
Sintering method: Lead zinc ore tailings are sintered to produce metals such as iron, zinc, copper, and non-metallic materials such as limestone and calcium silicate. The sintering method can effectively recover valuable metals and simultaneously obtain non-metallic materials, but it poses significant environmental pollution.
Landfill method: Most of the waste residue from lead-zinc mine tailings is directly buried in closed underground storage facilities. The advantage of landfill method is that it is simple and feasible, but the disadvantage is that it occupies a large area and causes significant environmental pollution, requiring strict anti-seepage measures.
Building materials: By crushing, screening, and grinding the tailings of lead-zinc mines, non-metallic materials such as silicate and slag can be obtained, which can be used to manufacture building materials such as cement and bricks.
Fertilizer making: Lead zinc ore tailings contain a large amount of phosphorus, potassium and other elements, which can be processed and proportioned appropriately to make efficient fertilizers for agricultural production.
It should be noted that the method of reusing lead-zinc mine tailings needs to be selected and adopted according to the actual situation. At the same time, it is also necessary to pay attention to environmental issues in the process of tailings reuse and take effective measures to reduce the impact on the environment.
