Method for soiling metal tailings and stabilizing heavy metals

A technology of metal tailings and soilization, applied in the field of environmental governance and restoration, can solve the problems of less collaborative research on tailings heavy metal stabilization and tailings soilization, incomplete processing, and many procedures, achieving low cost and convenient processing , the effect of protecting the ecological environment

Inactive Publication Date: 2020-12-18
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] To sum up, the current domestic technologies for the stabilization and soilization of heavy metals in tailings have the disadvantages of high cost, many procedures, and incomplete treatment. At the same time, there are few collaborative researches on the stabilization of heavy metals in tailings and soilization of tailings

Method used

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  • Method for soiling metal tailings and stabilizing heavy metals
  • Method for soiling metal tailings and stabilizing heavy metals
  • Method for soiling metal tailings and stabilizing heavy metals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Coal gangue is dried, crushed, and then sieved to obtain coal gangue powder, and the urban sludge is air-dried to obtain air-dried urban sludge; the tailings to be treated are turned over, and 5% of the tailings mass is added to the gangue powder and 5% The air-dried urban sludge is mixed evenly, and then 3% tailing mass stabilizer and water are added, and the mixture is continued to be evenly mixed to obtain a mixture with a solid-liquid ratio of 1:0.2, which is then left to stand for 1 month.

Embodiment 2

[0028] Coal gangue is dried, crushed, and then sieved to obtain coal gangue powder, and the urban sludge is air-dried to obtain air-dried urban sludge; the tailings to be treated are turned over, and 10% of the tailings mass is added to the gangue powder and 10% The air-dried urban sludge is mixed evenly, and then the stabilizing agent with 13% tailings mass and water are added, and the mixture is continued to be evenly mixed to obtain a mixture with a solid-liquid ratio of 1:0.3, which can be left to stand for 2 months.

Embodiment 3

[0030] Coal gangue is dried, pulverized, and then sieved to obtain coal gangue powder, and the urban sludge is air-dried to obtain air-dried urban sludge; the tailings to be treated are turned over, and coal gangue powder with 7.5% of the tailings mass and 7.5% The air-dried urban sludge is mixed evenly, and then 8% of the tailing mass stabilizer and water are added, and the mixture is continued to be evenly mixed to obtain a mixture with a solid-liquid ratio of 1:0.25, which is then left to stand for 1.5 months.

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Abstract

The invention discloses a method for soiling metal tailings and stabilizing heavy metals. The method comprises the following steps of S1, drying, crushing and sieving coal gangue to obtain coal ganguepowder, and air-drying municipal sludge to obtain air-dried municipal sludge; and S2, turning over the tailings to be treated, adding the coal gangue powder accounting for 5-10% of the mass of the tailings and the air-dried municipal sludge accounting for 5-10% of the mass of the tailings during turning over, uniformly mixing, adding a stabilizing agent accounting for 3-13% of the mass of the tailings and water, continuously and uniformly mixing to obtain a mixture with the solid-to-liquid ratio of 1: 0.2-0.3, and standing for at least one month. According to the method for soiling the metaltailings and stabilizing the heavy metals provided by the invention, the coal gangue and the municipal sludge are doped into the tailings and mixed, so that the fertility of the tailings is improved,the effect of reducing partial heavy metal mobility is achieved, then the stabilizing agent is added, most heavy metal in a mixture is stabilized, the heavy metal of the tailings is stabilized while the tailings are soiled, and therefore, the ecological environment around the tailings is effectively protected.

Description

technical field [0001] The invention belongs to the technical field of environmental treatment and restoration, and in particular relates to a method for soiling metal tailings and stabilizing heavy metals. Background technique [0002] Tailings are the powdery slag discharged during the mine beneficiation process. Generally, they are discharged in the form of tailings slurry and are naturally dehydrated to form solid waste. They are mainly stored in tailings ponds. However, tailings have a certain impact on the surrounding ecological environment pollution, safety, and resource waste. Ecological environmental pollution has always been one of the most studied issues in the process of tailings treatment because of its long impact period and relatively difficult treatment. one. Due to the complex composition of tailings minerals, long-term stockpiling and climate impact, the soil and groundwater around the mining area are polluted. [0003] Soilization of tailings means addin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00
CPCB09B3/00
Inventor 张冬冬冯天彦谭波瞿广飞宁平
Owner KUNMING UNIV OF SCI & TECH
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