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Resource mine repairing method

A restoration method and resource utilization technology, applied in the restoration of polluted soil, etc., can solve problems such as unreasonable utilization of mineral resources, resource waste, ecological environment hazards, etc., to eliminate heavy metal and chemical pollution, maximize land value, The effect of eliminating potential safety hazards

Active Publication Date: 2016-05-25
DALIAN DEETOP ENVIRONMENTAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention proposes a recovery method for resource-based mines, which solves the problem that a large amount of mineral resources in the tailings pond are not rationally utilized by the closed storage method in the prior art, resulting in waste of resources and harm to the ecological environment

Method used

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Examples

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Effect test

Embodiment 1

[0028] An abandoned gold mine, including industrial sites, dumps, and tailings ponds, needs ecological restoration.

[0029] (1) According to laboratory analysis, the gold content of the tailings resources in the tailings pond is 0.78g / t, which can be used for extraction of valuable elements, and the gold content of the ore resources in the dump site is 0.08g / t, which cannot be used for extraction of valuable elements.

[0030] (2) Extraction of valuable elements from tailings resources

[0031] The tailings resources in the tailings pond are recovered through the water mining process, and then the valuable elements in the tailings resources are extracted by using the spiral chute enrichment-fine grinding-flotation process to obtain gold concentrate with a gold grade of 25.03g / t ;

[0032] (2) The abandoned mine covers a large area, has many residents around, and has convenient transportation. There is a large reservoir 800 meters away from the mine. The mine will be restored...

Embodiment 2

[0047] An abandoned mine includes goafs and tailings ponds, which need ecological restoration.

[0048] (1) According to laboratory analysis, the gold grade of tailings resources in the tailings pool is 0.6g / t, which can be used for extraction of valuable elements.

[0049] (2) Extraction of valuable elements from tailings resources

[0050] The tailings resources in the tailings pool are mined through the water mining process to make 25% to 30% ore slurry, and then the valuable elements in the tailings resources are extracted and recovered by using the spiral chute enrichment-fine grinding-leaching adsorption process The rate is 95.22%.

[0051] (3) The analysis of the tailings after the extraction of valuable elements shows that the content of heavy metals in the tailings meets the standard, but due to the use of cyanide in the process of extracting valuable elements, the cyanide content is 235.18 mg / L, seriously exceeding the standard. Therefore, it is necessary to carry ...

Embodiment 3

[0061] An abandoned mine includes goafs and dry-stacked molybdenum tailings ponds, which need ecological restoration.

[0062] (1) It can be known from laboratory analysis that the tailings resource K in the dry pile molybdenum tailings pond 2 O grade 6.72%, Na 2 O grade is 1.61%. The potassium feldspar in the molybdenum tailings can be recovered, and the molybdenum tailings can also be directly used to prepare mineral fertilizers. According to economic analysis and post-filling requirements, it is determined that 80% of the molybdenum tailings will be used for the extraction of valuable elements, and 20% of the molybdenum tailings will be used for the preparation of mineral fertilizers.

[0063] (2) Extraction of valuable elements

[0064] The tailings resource of molybdenum tailings adopts desliming-feldspar flotation-magnetic separation to remove impurities and fluorine-free process to recover feldspar. K in feldspar concentrate 2 O grade 11.64%, Na 2 O grade is 2.11%...

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Abstract

The invention provides a resource mine repairing method. The method comprises the steps that a tailing resource in a tailing pond and / or a mineral resource of a rock stripping area or a dumping site are subjected to valuable element extraction; if tailings produced from the valuable element extraction procedure of the tailing resource and / or the mineral resource without the extracting value are suitable for deep processing, deep processing is conducted, and a target product is obtained; if the tailings are not suitable for deep processing, and a goaf or a subsidence area is filled with the tailings; harmless processing is conducted on occupied land of the rock stripping area or the dumping site and / or an industrial site; ecological restoration is conducted on the occupied land of the rock stripping area or the dumping site and / or the industrial site which is subjected to harmless processing and the goaf or the subsidence area subjected to filling. According to the resource mine repairing method, maximization of repaired land value is achieved, tailing-free, harm-free, hidden danger-free and all green repairing effects of a mine are achieved, the processing cost is low, and the economic benefit is good.

Description

technical field [0001] The invention relates to the technical field of environmental restoration, in particular to a restoration method for resourceful mines. Background technique [0002] The tailings ponds, rock stripping areas, and dumps formed during the mining development process have caused great harm to the natural environment: ① Stockpile and dispose of a large amount of waste rock, soil discharge, and tailings produced after mining (usually open-air The stripping ratio of mining is 5-10), which will occupy a large amount of land or forest land; ②During mining production, oxidation and wind erosion will make waste rock dumps and tailings ponds form a periodic source of dust storms, causing serious damage to the surrounding air Serious impact; ③ The hydraulic impact radius of the pressure-reducing funnel formed by the excavation of shafts and lanes in underground mining mines and the drainage of ore deposits can sometimes reach tens of kilometers away, causing regiona...

Claims

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Application Information

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IPC IPC(8): B09C1/00
CPCB09C1/00
Inventor 马跃高树龙李伟张勇王鞍山路畅韩洪鹏
Owner DALIAN DEETOP ENVIRONMENTAL TECH CO LTD
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