CN106315944A - Method for processing cyanogens-containing waste water from gold mine - Google Patents

Method for processing cyanogens-containing waste water from gold mine Download PDF

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Publication number
CN106315944A
CN106315944A CN201510374259.7A CN201510374259A CN106315944A CN 106315944 A CN106315944 A CN 106315944A CN 201510374259 A CN201510374259 A CN 201510374259A CN 106315944 A CN106315944 A CN 106315944A
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China
Prior art keywords
waste water
processing
gold mine
cyanide
feature exists
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Pending
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CN201510374259.7A
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Chinese (zh)
Inventor
袁再六
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TONGREN CITY WANSHANG DISTRICT SHENGHE MINING INDUSTRY Co Ltd
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TONGREN CITY WANSHANG DISTRICT SHENGHE MINING INDUSTRY Co Ltd
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Application filed by TONGREN CITY WANSHANG DISTRICT SHENGHE MINING INDUSTRY Co Ltd filed Critical TONGREN CITY WANSHANG DISTRICT SHENGHE MINING INDUSTRY Co Ltd
Priority to CN201510374259.7A priority Critical patent/CN106315944A/en
Publication of CN106315944A publication Critical patent/CN106315944A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a method for processing cyanogens-containing waste water from gold mine. The method comprises the following steps: waste water adjusting, coagulation processing, secondary coagulation processing, ultraviolet ray processing, and concentration reducing processing. According to the invention, a coagulant and a flocculant employed in the invention can effectively reduce the amount of suspended impurity in the waste water, a crude flocculation body can be aggregated rapidly, so that rapid separating from water can be carried out, most pollutant in the waste water can be removed effectively through precipitation, by adding zinc sulfate, the cyanide is precipitated with a zinc cyanide mode, then is acidified by sulfuric acid, the concentration of the cyanide is reduced to lower than 0.1 mg/1, an iron-cyanogen complex is removed, The method provided by the invention has the characteristics of rapidity and high efficiency, and is the excellent method for processing cyanogens-containing waste water from gold mine.

Description

A kind of processing method of Cyanide Wastewater of Gold Mine
Technical field
The present invention relates to Pollutant Treatment technical field, be specifically related to a kind of Cyanide Wastewater of Gold Mine Processing method.
Background technology
Gold mine waste is mainly by the most waste water composition of digging and ore-dressing technique two, beanstalk water quality and water Measure and change with mining area soil lithology matter, mining method, volume of production and committee joint.Main in waste water Polluter is the suspended material being made up of silt, clay, humus and bark and grass roots, secondly It it is organic substance etc..Though this waste water has a certain degree of stability, but in discharge process not Easily precipitation. making natural water muddy, colourity increases.Meanwhile, to swimming in aquatic ecosystem Flora, floating debate fauna, the sacrificial biota in the end and cause impact according to group and destroy.Gold mine gives up Water water quality belongs to multistage coarse dispersion system.Its dispersed substance is the silt particle particle of different-grain diameter, point Dispersion media is water.The clay water lazy limb limb group formed is by limb rib adsorption layer, disperses a layer group Become. owing to all adsorbing substantial amounts of anion on each ten glue edge surfaces so that same between micelle Property electric charge is mutually exclusive and is difficult to precipitate.The composition of different waste water is different, and all waste water are all in weak Alkalescence, various electrical conductivity of waters are the highest, and the difference between water quality is relatively small.Various water In ion be mainly calcium, magnesium cation and sulfate radical and bicarbonate anion, other metal The content of ion is the highest.What content difference was maximum is turbidity and the suspension content of waste water.
Owing to current gold mine can use Cyanide Process during extracting, thus can produce Raw substantial amounts of cyanide wastewater, these waste water have certain toxicity, can cause environment huge Harm.
Summary of the invention
It is desirable to provide the processing method of a kind of Cyanide Wastewater of Gold Mine fast and efficiently, with Solve the waste water problem to environment.
The present invention is achieved by the following technical programs:
A kind of processing method of Cyanide Wastewater of Gold Mine, the method comprises the following steps:
A, waste water regulate: add strong reagents, strong base reagent, catalyst, control in waste water In course of reaction processed, the pH value of waste water is 8-9.5, and the response time is 25-30min;
B, coagulating treatment: stir reacted waste water according to the linear velocity of regulation clockwise, And add flocculating agent, waste water is put into standing 20-30min in sedimentation tank;
C, second coagulation process: according to the speed stirring waste water of regulation and to useless after despumation Water adds flocculant, places into standing 15-20min in sedimentation tank;
D, UV treatment: the supernatant of waste water is carried out ultra violet lamp, irradiation time is 20-30min;
E, dense process being dropped: adds zinc sulfate in the waste water that irradiation completes, make cyanide with cyanogen Change the form Precipitation of zinc, then be acidified with sulphuric acid so that concentration of cyanide fall≤0.1mg/l, React rear waste water to send in pond recycling or directly discharge.
One during strong reagents is sulphuric acid, hydrochloric acid in described step a.
Catalyst in described step a be concentration be 40-50% copper-bath.
Strong base reagent in described step a is sodium hydroxide solution.
Stirring linear velocity in described step b is 5-15m/s.
Flocculating agent in described step b is the one in Alumen, aluminium polychlorid.
Flocculant in described step c is polyacrylamide.
The concentration of the sulphuric acid used in described step e is 70-75%.
The beneficial effects of the present invention is: this method uses flocculating agent and flocculant, effectively Reduce the cool qualitative of cavity and suspended impurity in waste water, allow them to quickly to be gathered into thicker Floccule body, in order to be separated from the water away rapidly, then by precipitation, it is possible to effectively remove Most of pollutant in waste water, finally by adding zinc sulfate, make cyanide with zinc cyanide Form Precipitation, then be acidified with sulphuric acid, concentration of cyanide can be reduced to below 0.1mg/l, And ferrum cyano complex can also be removed, this method has feature rapidly and efficiently, is a kind of excellent The processing method of Cyanide Wastewater of Gold Mine.
Detailed description of the invention
Below in conjunction with specific embodiment, technical scheme is further described, but requirement The scope of protection is not limited to described.
Embodiment one
A kind of processing method of Cyanide Wastewater of Gold Mine, the method comprises the following steps:
A, waste water regulate: add sulphuric acid, hydrochloric acid, sodium hydroxide solution, concentration in waste water Be 40% copper-bath, controlling the pH value of waste water in course of reaction is 8, the response time For 25min;
B, coagulating treatment: clockwise direction is that 5m/s stirs reacted waste water according to linear velocity, And add Alumen, waste water is put into standing 20min in sedimentation tank;
C, second coagulation process: according to the speed stirring waste water of regulation and to useless after despumation Water adds polyacrylamide, places into standing 15min in sedimentation tank;
D, UV treatment: the supernatant of waste water is carried out ultra violet lamp, irradiation time is 20min;
E, dense process being dropped: adds zinc sulfate in the waste water that irradiation completes, make cyanide with cyanogen Change the form Precipitation of zinc, then be 70% sulphuric acid acidifying by concentration so that concentration of cyanide drops ≤ 0.1mg/l, has reacted rear waste water and can send in pond recycling or directly discharge.
Embodiment two
A kind of processing method of Cyanide Wastewater of Gold Mine, the method comprises the following steps:
A, waste water regulate: add sulphuric acid, hydrochloric acid, sodium hydroxide solution, concentration in waste water Be 50% copper-bath, controlling the pH value of waste water in course of reaction is 9.5, during reaction Between be 30min;
B, coagulating treatment: clockwise direction is that 15m/s stirs reacted waste water according to linear velocity, And add aluminium polychlorid, waste water is put into standing 30min in sedimentation tank;
C, second coagulation process: according to the speed stirring waste water of regulation and to useless after despumation Water adds polyacrylamide, places into standing 20min in sedimentation tank;
D, UV treatment: the supernatant of waste water is carried out ultra violet lamp, irradiation time is 30min;
E, dense process being dropped: adds zinc sulfate in the waste water that irradiation completes, make cyanide with cyanogen Change the form Precipitation of zinc, then be 75% sulphuric acid acidifying by concentration so that concentration of cyanide drops ≤ 0.1mg/l, has reacted rear waste water and can send in pond recycling or directly discharge.
Embodiment three
A kind of processing method of Cyanide Wastewater of Gold Mine, the method comprises the following steps:
A, waste water regulate: add sulphuric acid, hydrochloric acid, sodium hydroxide solution, concentration in waste water Be 45% copper-bath, controlling the pH value of waste water in course of reaction is 8.7, during reaction Between be 28min;
B, coagulating treatment: clockwise direction is that 10m/s stirs reacted waste water according to linear velocity, And add Alumen, waste water is put into standing 25min in sedimentation tank;
C, second coagulation process: according to the speed stirring waste water of regulation and to useless after despumation Water adds polyacrylamide, places into standing 18min in sedimentation tank;
D, UV treatment: the supernatant of waste water is carried out ultra violet lamp, irradiation time is 25min;
E, dense process being dropped: adds zinc sulfate in the waste water that irradiation completes, make cyanide with cyanogen Change the form Precipitation of zinc, then be 73% sulphuric acid acidifying by concentration so that concentration of cyanide drops ≤ 0.1mg/l, has reacted rear waste water and can send in pond recycling or directly discharge.

Claims (8)

1. the processing method of a Cyanide Wastewater of Gold Mine, it is characterised in that: the method include with Lower step:
A, waste water regulate: add strong reagents, strong base reagent, catalyst, control in waste water In course of reaction processed, the pH value of waste water is 8-9.5, and the response time is 25-30min;
B, coagulating treatment: stir reacted waste water according to the linear velocity of regulation clockwise, And add flocculating agent, waste water is put into standing 20-30min in sedimentation tank;
C, second coagulation process: according to the speed stirring waste water of regulation and to useless after despumation Water adds flocculant, places into standing 15-20min in sedimentation tank;
D, UV treatment: the supernatant of waste water is carried out ultra violet lamp, irradiation time is 20-30min;
E, dense process being dropped: adds zinc sulfate in the waste water that irradiation completes, make cyanide with cyanogen Change the form Precipitation of zinc, then be acidified with sulphuric acid so that concentration of cyanide fall≤0.1mg/l, React rear waste water to send in pond recycling or directly discharge.
The processing method of Cyanide Wastewater of Gold Mine the most according to claim 1, its feature exists In: the one during strong reagents is sulphuric acid, hydrochloric acid in described step a.
The processing method of Cyanide Wastewater of Gold Mine the most according to claim 1, its feature exists In: the catalyst in described step a be concentration be 40-50% copper-bath.
The processing method of Cyanide Wastewater of Gold Mine the most according to claim 1, its feature exists In: the strong base reagent in described step a is sodium hydroxide solution.
The processing method of Cyanide Wastewater of Gold Mine the most according to claim 1, its feature exists In: stirring linear velocity in described step b is 5-15m/s.
The processing method of Cyanide Wastewater of Gold Mine the most according to claim 1, its feature exists In: the flocculating agent in described step b is the one in Alumen, aluminium polychlorid.
The processing method of Cyanide Wastewater of Gold Mine the most according to claim 1, its feature exists In: the flocculant in described step c is polyacrylamide.
The processing method of Cyanide Wastewater of Gold Mine the most according to claim 1, its feature exists In: the concentration of the sulphuric acid used in described step e is 70-75%.
CN201510374259.7A 2015-06-30 2015-06-30 Method for processing cyanogens-containing waste water from gold mine Pending CN106315944A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108821472A (en) * 2018-07-04 2018-11-16 中国矿业大学 Metal top cradle and wastewater recycling method in precipitating-gas floatation process recycling Cyanide Wastewater of Gold Mine
CN109385538A (en) * 2018-11-12 2019-02-26 刘西分 A kind of method that cyanide barren solution environment-friendly type processing cycle utilizes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020097135A (en) * 2002-12-09 2002-12-31 김용남 Sewage and waste water disposal plant
CN1488588A (en) * 2003-08-15 2004-04-14 韩玲萍 Cyanogen-containing waste water treating method and treating system thereof
CN104045191A (en) * 2014-07-12 2014-09-17 长春黄金研究院 Cyanogen-containing wastewater treatment method
CN104193054A (en) * 2014-09-18 2014-12-10 长春黄金研究院 Treatment method for cyanide-containing wastewater of gold mines

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20020097135A (en) * 2002-12-09 2002-12-31 김용남 Sewage and waste water disposal plant
CN1488588A (en) * 2003-08-15 2004-04-14 韩玲萍 Cyanogen-containing waste water treating method and treating system thereof
CN104045191A (en) * 2014-07-12 2014-09-17 长春黄金研究院 Cyanogen-containing wastewater treatment method
CN104193054A (en) * 2014-09-18 2014-12-10 长春黄金研究院 Treatment method for cyanide-containing wastewater of gold mines

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
谢建宏 等: "《黄金选冶》", 31 July 2014, 北京:冶金工业出 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108821472A (en) * 2018-07-04 2018-11-16 中国矿业大学 Metal top cradle and wastewater recycling method in precipitating-gas floatation process recycling Cyanide Wastewater of Gold Mine
CN109385538A (en) * 2018-11-12 2019-02-26 刘西分 A kind of method that cyanide barren solution environment-friendly type processing cycle utilizes
CN109385538B (en) * 2018-11-12 2020-10-30 刘西分 Environment-friendly treatment and recycling method for cyanide barren solution

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