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Closed-pile ecological restoration method for gold ore dump leaching field

A technology of ecological restoration and heap leaching, which is applied in the fields of chemical instruments and methods, restoration of polluted soil, water/sludge/sewage treatment, etc. It can solve the problems of long treatment period, large accumulation of chloride ions, poor treatment effect of cyanide, etc. question

Pending Publication Date: 2020-12-11
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention provides a closed-pile ecological restoration method of a gold ore heap leaching field to solve the problems in the gold ore heap leaching field of poor treatment effect on cyanide, large accumulation of chloride ions, no treatment effect on heavy metals and long treatment period

Method used

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  • Closed-pile ecological restoration method for gold ore dump leaching field

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Such as figure 1 shown, including the following steps:

[0021] (1) surface covering soil: carry out surface covering soil to heap leach pile 1, cover soil layer 2 thickness 300mm, soil source adopts stripping soil or surface layer soil in mining area;

[0022] (2) Sprinkler system installation: move the original sprinkler system 3 of the heap leach pile 1 above the covering soil layer 2 of the heap leach pile 1, if there is no sprinkler system 3, it needs to be reinstalled, and the spraying range covers the heap leach pile 1. The spray intensity is 3L / m 2 h;

[0023] (3) Planting of cyanide-reducing plants: According to the climate in the area and the properties of the heap leaching residue, select a plant that is suitable for the local climate conditions, can grow on the covering soil layer 2 of the heap leaching pile 1, and has the function of removing cyanide: Osmanthus fragrans , transplanting or spreading grass seeds in the covering soil layer 2 of the heap lea...

Embodiment 2

[0031] Such as figure 1 shown, including the following steps:

[0032] (1) Surface covering soil: carry out surface covering soil to the heap leach pile 1, the covering soil layer 2 thickness is 600mm, and the soil source adopts stripped soil or surface soil in the mining area;

[0033] (2) Sprinkler system installation: move the original sprinkler system 3 of the heap leach pile 1 above the covering soil layer 2 of the heap leach pile 1, if there is no sprinkler system 3, it needs to be reinstalled, and the spraying range covers the heap leach pile 1. The spray intensity is 8L / m 2 h;

[0034](3) planting of cyanide-reducing plants: according to the local climate and the properties of the heap leaching slag, select plants that are adapted to the local climate conditions, can grow on the covering soil layer 2 of the heap leaching pile 1, and have the function of removing cyanide: oats, Transplant or spread grass seeds in the cover soil layer 2 of the heap leaching pile 1, an...

Embodiment 3

[0042] Such as figure 1 shown, including the following steps:

[0043] (1) surface covering soil: carry out surface covering soil to the heap leach pile 1, covering soil layer 2 thickness 1000mm, and the soil source adopts stripping soil or surface layer soil in the mining area;

[0044] (2) Sprinkler system installation: move the original sprinkler system 3 of the heap leach pile 1 above the covering soil layer 2 of the heap leach pile 1, if there is no sprinkler system 3, it needs to be reinstalled, and the spraying range covers the heap leach pile 1. The spray intensity is 12L / m 2 h;

[0045] (3) planting of cyanide-reducing plants: according to the climate in the area and the properties of the heap leaching residue, select a plant that is adapted to the local climate conditions, can grow on the covering soil layer 2 of the heap leaching pile 1, and has the function of removing cyanide: alkali-coated Grass, transplant or spread grass seeds in the cover soil layer 2 of th...

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Abstract

The invention relates to a closed-pile ecological restoration method for a gold ore dump leaching field, and belongs to pollutant treatment and ecological restoration methods in the field of environmental protection. The method comprises the following steps of heap leaching heap surface layer earthing, spraying system installation, cyanide-reducing plant planting, leachate treatment and spraying liquid preparation and spraying, and has the advantages that heap leaching heap cyanide-containing leachate treatment, heap leaching residue residual gold leaching and decyanation treatment and heap leaching heap ecological restoration treatment are fused together, efficient decyanation treatment of cyanide-containing leachate and dump leaching residues in the gold ore cyaniding dump leaching process can be achieved, recovery of gold, silver and other valuable metal elements in the leachate and the dump leaching residues can be achieved, ecological restoration and treatment of dump leaching heap can be achieved, the dump leaching field decyanation treatment and ecological restoration period is shortened, a very efficient practical method is provided for environmental governance of gold orecyaniding dump leaching process enterprises, and good application prospects are achieved.

Description

technical field [0001] The invention relates to a pollutant treatment and ecological restoration method in the field of environmental protection, in particular to a closed-pile ecological restoration method of a gold ore heap leaching site. Background technique [0002] In the gold industry, the gold ore heap leaching production process is a simple and economical technology for recovering gold from low-grade ores. An important method of recovering gold, as the grade of mined gold decreases, more and more gold mining enterprises will adopt the heap leaching gold extraction process to produce gold. Cyanide heap leaching has always been the mainstream process of gold ore heap leaching due to its high gold recovery rate. However, due to the use of highly toxic cyanide in the heap leaching production process, the cyanide-containing heap leaching residue and wastewater need to be treated at the end of the heap leaching , and then carry out the closing and ecological restoration w...

Claims

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Application Information

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IPC IPC(8): B09C1/00B09C1/08B09C1/10C22B7/00C22B11/00C02F9/04C02F103/06C02F101/18
CPCB09C1/00B09C1/08B09C1/105C22B7/006C22B11/042C02F1/281B09C2101/00C02F2103/06C02F2101/18Y02P10/20
Inventor 刘强李哲浩迟崇哲龙振坤
Owner CHANGCHUN GOLD RES INST
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