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Method for restoring mine entironment

An ecological environment and mine technology, which is applied in the field of mine ecological environment governance and mine ecological environment restoration, to achieve the effect of eliminating potential pollution sources, improving resource utilization, and improving enthusiasm.

Inactive Publication Date: 2007-09-19
ELION ECOLOGICAL RESTORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention aims to restore the ecological environment of mines, and the technical problem to be solved is to realize the restoration of the ecological environment of mines through the treatment of acid drainage and heavy metal pollution in metal mines

Method used

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  • Method for restoring mine entironment

Examples

Experimental program
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Effect test

Embodiment 1

[0026] Simulate the construction of a new tailings pond, and lay straw at the bottom of the tailings pond to control heavy metal pollution in mines. Add straw to the bottom of the simulation experiment column with a diameter of 10cm and a height of 1.5m to form an organic layer with a filling height of 10cm. Add 100ml of urban biological sludge to the straw to inoculate bacteria, and then add tailings to a filling height of 100cm. Add the simulated water with a zinc ion concentration of 20mg / L, a sulfate ion concentration of 100mg / L, and a pH of 5, into the simulated experimental column, and let it stand for 3 days to continuously enter the simulated water. After the experimental system is stable, it will be tested. The pH value, zinc ion concentration and sulfate ion concentration of the effluent. Zinc ion was determined by 4-2-pyridylazoresorcinol spectrophotometry, and sulfate was determined by barium chromate spectrophotometry. The concentration of zinc ions in the efflue...

Embodiment 2

[0028] Simulate the tailings pond in service, and directly add organic matter to the tailings pond to control heavy metal pollution in mines. According to the proportion of 0.01%, the straw is added to the tailing sand and mixed evenly, inoculated with municipal domestic sludge, and then the mixed tailings are added to the simulation experiment column with a diameter of 10cm and a height of 1.5m, and the filling height is 100cm. Add the simulated water with a zinc ion concentration of 20mg / L, a sulfate ion concentration of 100mg / L, and a pH of 5, into the simulated experimental column, and let it stand for 3 days to continuously enter the simulated water. After the experimental system is stable, it will be tested. The pH value, zinc ion concentration and sulfate ion concentration of the effluent. Zinc ion was determined by 4-2-pyridylazoresorcinol spectrophotometry, and sulfate was determined by barium chromate spectrophotometry. The concentration of zinc ions in the effluent...

Embodiment 3

[0030] Simulate the tailings pond in service, and directly add organic matter to the tailings pond to control heavy metal pollution in mines. Fill the tailings sand with a height of 100 cm in a simulation experiment column with a diameter of 10 cm and a height of 1.5 m. Simulated water and domestic sewage with a concentration of 20mg / L zinc ion concentration, 100mg / L sulfate ion concentration, and pH 5 are added to the simulation experiment column at the same time in a ratio of 100:1, and the filtration rate is controlled to be 0.1-3m / d. After 3 days of operation, the system is basically stable, and the pH value, zinc ion concentration, and sulfate ion concentration of the water are detected by sampling. Zinc ion was determined by 4-2-pyridylazoresorcinol spectrophotometry, and sulfate was determined by barium chromate spectrophotometry. The effluent zinc ion concentration is less than 1.0mg / L, the sulfate ion concentration is less than 50mg / L, and the pH value is greater th...

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Abstract

A method of repairing mine ecological environment comprises the treatment of mine environment contamination, wherein the tailings, the barren rock, the smelting slag, the waste water from ore cleaning, the waste water from smelting, the acid mine drainage and the ore yard leachwater which are generated from mine development are collected into the tailings storage, at the same time, sludge and organic matter capable of being degradated by microbiology are added therein, and then the tailings storage is given an anaerobic environment artificially, so that, under the action of microbiology and sulfate reducing bacteria, sulfur ion is generated and the pH value of the tailings storage is increased, a plurality of heavy metal ions are cured and settled by sulfur ion to avoid migration, a biomembrane layer-sulfate reducing bacteria reducing-induction biomineralization precipitation composite geochemical barrier is generated in the tailings storage. The repairing of mine ecological environment is realized by the treatment of mine environment contamination. The present invention can be used for tailings storage pollution prevention in tour, and can be used for closing the repairing of mine ecological environment, or can be used for designing new tailings storage by using the technology of the present invention.

Description

1. Technical field [0001] The invention relates to an environmental protection technology and method, in particular to a method for controlling the ecological environment of a mine, in particular to a method for restoring the ecological environment of a mine. 2. Background technology [0002] Mineral deposits consist of ore and host rock. To mine ore, the surrounding rock must be stripped. Every ton of ore mined usually needs to discharge several tons of waste rock. In particular, the metal content of non-ferrous metal ores is generally low. In order to produce 1 ton of metal, it is often necessary to mine tens, hundreds, or even thousands of tons of ore. Mine development not only produces huge solid waste, but also because the mine engineering has changed the original geological environment, a large number of sulfides that are stable in the reducing environment are exposed to the oxidizing environment, and due to chemical oxidation and biological oxidation, severe acid mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/28C02F3/34C02F1/68C02F103/10C02F101/20
Inventor 陈天虎周本军何准庆承松朱承驻闫峻岳统波
Owner ELION ECOLOGICAL RESTORATION
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