Soilless nutrient medium for ore sand and ecological repair method for closed nonferrous metal tailings pond

Abstract

The invention discloses a soilless nutrient medium for ore sand and an ecological repair method for a closed nonferrous metal tailings pond. The soilless nutrient medium for ore sand is prepared by adding the following components in parts by mass: 0.06-0.12 part of an aggregate polymerizing agent, 0.12-0.22 part of a water-retaining agent, 0.06-0.12 part of a binder, 1.4-5 parts of a fibrous material, 0.18-0.3 part of a long-acting compound fertilizer, 7-27 parts of humus and 0.18-0.32 part of mixed seeds to obtain the soilless nutrient medium for ore sand by taking tailings pond mud of the closed nonferrous metal tailings pond as a final covering raw material. The repair method comprises the following steps: uniformly stirring the soilless nutrient medium for ore sand with a hydraulic spraying and sowing trolley to the surface of the tailings pond; and finally, ecologically repairing the closed nonferrous metal tailings pond. The repair cost is low, the spray layer is stable, a plantgrowth layer formed by drying the spray layer has a good water absorption water-retaining property, water obtained by rainfall can be stored for a long time for the demand of plant growth, and moreover, the growth layer has relatively good structural toughness, and is hardly aeolated to lead to flying dust, so that the actual effect of inhibiting flying dust is achieved.

Description

technical field [0001] The invention belongs to the field of ecological restoration of mines, and in particular relates to a method for restoring the ecology of ore sand soilless nutrient base and non-ferrous metal tailings reservoir closure. Background technique [0002] Non-ferrous metal tailings are generally composed of various minerals contained in ores, gangues and surrounding rocks, and its main chemical composition is SiO 2 , CaO, MgO, Al 2 o 3 , Fe 2 o 3 Wait. There is no mature technical solution for the ecological restoration of non-ferrous ore tailings ponds, which is mainly reflected in the difficulty of restoration of non-ferrous ore tailings ponds and the high restoration goals. Among them, the difficulty of repairing non-ferrous ore tailings ponds is manifested in the following characteristics: [0003] (1) The particles are extremely fine, most of which are less than -0.074mm; [0004] (2) There are as many as 40 kinds of metal elements in the tailing...

AI Technical Summary

Problems solved by technology

[0018] The purpose of the present invention is to provide a soilless nutrient base for ore and a method for restoring the closed ecology of non-ferrous metal tailings ponds, aiming to solve various problems in the existing repair methods for non-ferrous ore tailings ponds in the above-mentioned background technology

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