Soil remediation method based on laterite-nickel ore smelting tailing landfill

By laying the base layer in the tailings landfill area of ​​the laterite nickel ore smelting tailings, setting up landfill layers, drainage layers and greening soil layers, and planting green plants, the soil pollution problem caused by direct landfill of tailings is solved, and the ecological restoration of soil and the healthy growth of vegetation is achieved.

CN119640768APending Publication Date: 2025-03-18GREENMEI HONG KONG INTERNATIONAL LOGISTICS CO LTD
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Patent Information

Application Number
CN202411939752.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-26
Publication Date
2025-03-18

AI Technical Summary

Technical Problem

Direct landfill of laterite nickel ore smelting tailings leads to soil pollution in the landfill area, and existing repair methods are difficult to effectively restore ecologically.

Method used

Soil repair method based on the smelting tailings of laterite nickel ore is adopted, including laying a base layer in the soil area to be filled, setting up a landfill layer (combined with the wet tailings of laterite nickel ore, ignition tailings and humus soil), and setting up a drainage layer and a greening soil layer on it, and finally planting greening plants on the greening soil layer.

Benefits of technology

Through this method, the heavy metal activity in the sludge of laterite nickel ore smelting tailings can be effectively reduced, the pollution hazard to soil, the soil restoration efficiency can be improved, the vegetation growth can be promoted, and the ecological restoration of landfill areas can be achieved.

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Abstract

The invention provides a soil remediation method based on laterite-nickel ore smelting tailing landfill, which comprises the following steps: firstly, carrying out reinforcement treatment on a to-be-landfilled soil area so as to lay a base layer at the bottom of the to-be-landfilled soil area; secondly, a landfill layer is arranged on the base layer, and the landfill layer comprises laterite-nickel ore wet tailings, laterite-nickel ore pyrogenic tailings and humus soil; thirdly, a drainage layer is arranged on the landfill layer, and the drainage layer is connected with drainage ditches on the periphery of the to-be-landfilled soil area; thirdly, a greening soil layer is laid on the drainage layer, and the soil of the greening soil layer is beneficial to vegetation growth; and finally, green plants are planted on the green soil layer, so that soil remediation is completed. According to the method, the humus soil is doped in the landfill layer, the soil remediation efficiency can be improved, the activity of heavy metals in the laterite-nickel ore wet tailings and the laterite-nickel ore pyrogenic tailings can be reduced, and then green plants are planted on the green soil layer, so that the pollution harmfulness to the soil after direct landfill of the laterite-nickel ore smelting tailings is reduced.
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