Comprehensive treatment method of slag heap of acidified gold ore containing heavy metal

A comprehensive treatment, heavy metal technology, applied in the direction of solid waste removal, etc., can solve the problem of high cost

Inactive Publication Date: 2015-09-02
GUANGDONG XIFU ENVIRONMENTAL PROTECTION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The heavy metal curing agent effectively solidifies the heavy metals in the soil without causing soil compaction, without secondary pollution, but peat is a non-renewable resource and the cost is high

Method used

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  • Comprehensive treatment method of slag heap of acidified gold ore containing heavy metal
  • Comprehensive treatment method of slag heap of acidified gold ore containing heavy metal
  • Comprehensive treatment method of slag heap of acidified gold ore containing heavy metal

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Experimental program
Comparison scheme
Effect test

Embodiment

[0025] (1) Stabilization Repair

[0026] Relative to slag field surface layer 0-20cm slag 100% by weight, stabilizer formula is as shown in table 1 in each embodiment, wherein, contrast is the slag field soil that has not been processed by stabilizer, and the stabilization treatment process is: treat 2m with stabilizer 2 For the soil in the slag field, mix the stabilizer and slag evenly, and then maintain it under natural conditions for 28 days to complete the stabilization process. Then take out the sample, air-dry it naturally, grind it through a 2mm sieve, and conduct a leaching toxicity test on the sample with reference to HJ557-2010 "Solid Waste Leaching Toxicity Leaching Method-Horizontal Oscillating Method". See Table 2.

[0027] Formulation of stabilizer in each embodiment of table 1

[0028]

Lime (wt%)

Fly ash (wt%)

Organic fertilizer (wt%)

control

Example 1

5

Example 2

10

...

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Abstract

The invention relates to a stabilized and ecological remediation comprehensive treatment method of slag heap of acidified gold ore containing heavy metal, and belongs to the technical field of heavy metal pollution treatment in an ore field. The method comprises the following steps: adding a certain amount of lime, coal ash and organic sludge compost into 0-20cm soil at the upper layer of the slag heap of the gold ore containing heavy metal, mixing the ore slag and the additive according to a certain ratio and stirring so as to mix evenly, adding water into the ore slag, pouring, maintaining at the natural condition for 15-30 days so as to stabilize the slag heap of the gold core containing heavy metal; then, planting heavy metal tolerant plants including ciliate desert-grass, ramie and vetiver grass, so as to further remediate the heavy metal polluted slag heap ecologically. The method can effectively stabilize heavy metal, such as arsenic and cadmium in the gold ore slag, neutralize acid in the ore slag, improve the pH of soil in the ore field, reduce the leaching of heavy metal, enhance the soil structure, increase the soil fertility, and achieve the ecological recovery of the heavy metal polluted ore slag field.

Description

Technical field: [0001] The invention relates to the technical field of heavy metal pollution control in mining areas, in particular to an integrated comprehensive treatment method for the stabilization and restoration of acidified gold mine slag fields containing heavy metals and ecological restoration. Background technique: [0002] my country is rich in mineral resources. Since the reform and opening up, great achievements have been made in the exploration and development of mineral resources, but at the same time, mining and smelting have also caused serious heavy metal pollution in the ecological environment of the mining area and surrounding areas. Some gold mines in my country have left a large amount of toxic and harmful slag due to years of disorderly mining and the use of earth-based cyanide gold extraction technology. Due to long-term immersion and leaching of rainwater, acidic mine wastewater has been formed. Due to the high toxicity and disorderly stacking of sl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B3/00B09B5/00
Inventor 张太平扈华庚赵述华潘伟斌
Owner GUANGDONG XIFU ENVIRONMENTAL PROTECTION TECH
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