Deep treatment method for cyanide-containing waste water of tailings pond in gold industry

A technology for industrial tailings and advanced treatment, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve the problems of resource waste, poor treatment effect, etc., and reduce treatment costs , Strong impact load resistance, good treatment effect

Inactive Publication Date: 2013-08-21
CHANGCHUN GOLD RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The natural degradation method, the alkali chlorine method, the inco method, and the ozone method mainly destroy cyanide and rhodanide. These methods produce secondary pollutants ammonia nitrogen while destroying pollutants, and are effective in the treat

Method used

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  • Deep treatment method for cyanide-containing waste water of tailings pond in gold industry
  • Deep treatment method for cyanide-containing waste water of tailings pond in gold industry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 - Small Test

[0023] The waste water from a tailing pond of a gold mine was taken as a test water sample, and its water quality composition is as follows:

[0024] Composition of main pollutants in cyanide-containing wastewater

[0025] serial number

Analysis Project

chemical symbol

Concentration value (mg / L)

1

total cyanide

CN T

87.17

2

free cyanide

CN f

17.69

3

Thiocyanate

SCN -

20.51

4

Cod

COD

89

5

Ammonia nitrogen

NH 4 -N

0.13

6

copper

Cu

83.63

[0026] (1) Ozone oxidation test

[0027] Test conditions

[0028] Reaction container: Φ100mm×H1000mm plexiglass column; treatment method: continuous treatment; PH: 8~9; ozone addition amount: 0.33g / L waste water; gas volume: 0.15m 3 / h; wastewater treatment capacity: 1L / h; hydraulic retention time: 1h.

[0029] test results

[0030] Ozone oxidation test res...

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Abstract

The invention discloses a deep treatment method for cyanide-containing waste water of a tailings pond in the gold industry. The process adopts an ozone oxidation method, a catalytic oxidation method and a biological treatment method to collectively deeply treat the cyanide-containing waste water of the tailings pond in the gold industry. Through the combination of the three methods, a good treatment effect on the cyanide, thiocyanate, arsenic and heavy metals is good, the content of the cyanide after being treated is less than or equal to 0.05mg/L, the content of ammonia and nitrogen after being treated is less than 1mg/L, and other pollutants after being treated can meet the requirement of the ground surface water grade-B water quality standard. The method is used for treating the cyanide-containing waste water of the tailings pond in the gold industry, the treatment effect on the cyanide, the COD, As and heavy metals is good, the heavy metals such as the gold and silver as well as other metal resource can be recovered, and the secondary pollution caused by the ammonia and nitrogen can be avoided. By adopting the deep treatment method for the cyanide-containing waste water of the tailings pond, a good environment, a good economic benefit and a good social benefit can be achieved.

Description

technical field [0001] The invention belongs to the technical field of mine environmental protection and comprehensive management, and relates to a process method for the advanced treatment of cyanide-containing wastewater in gold industrial tailings ponds. Advanced treatment of cyanide wastewater. The cyanide-containing wastewater of the gold industrial tailings pond treated by this method has a good treatment effect on cyanide, COD, As, and heavy metals. The treated cyanide is less than or equal to 0.05mg / L, and the treated ammonia nitrogen is less than 1mg / L. After treatment, it can meet the requirements of the second-class water quality standard for surface water, and can recover precious metals such as gold and silver and other metal resources, and can avoid secondary pollution caused by ammonia nitrogen. Adopting the method of the invention to treat the cyanide-containing wastewater of the tailing pond has good environmental, economic and social benefits. Background t...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 李哲浩吕春玲降向正刘强
Owner CHANGCHUN GOLD RES INST
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