CN107597816A - A kind of gold industry cyanogen Slag treatment method - Google Patents
A kind of gold industry cyanogen Slag treatment method Download PDFInfo
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- CN107597816A CN107597816A CN201711052853.XA CN201711052853A CN107597816A CN 107597816 A CN107597816 A CN 107597816A CN 201711052853 A CN201711052853 A CN 201711052853A CN 107597816 A CN107597816 A CN 107597816A
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Abstract
The present invention relates to a kind of gold industry cyanogen Slag treatment method, belong to the administering method of pollutant in field of Environment Protection.The oxidating chemicals of certain mass are added into cyaniding tailing slurry, the acid of certain mass is added into the ore pulp after oxidation processes, the ferrous sulfate of certain mass is added into ore pulp, ore pulp is carried out by press filtration processing using filter press, cyanogen slag after processing meets the requirement of National Hazard waste judging standard, and press filtration filtrate recycle is in enterprise's production procedure.The present invention be it is a kind of efficiently, efficiently cyanogen dregs innocent treatment method, there is the advantages of processing cost is low, treatment effect is stable, simple to operate, and there is general applicability, it is easy to spread.
Description
Technical field
The present invention relates to the administering method of pollutant in field of Environment Protection, more particularly to a kind of gold industry cyanogen Slag treatment side
Method.
Background technology
Gold mine is in process of production due to that using Cyanide Process, can produce substantial amounts of cyanogen slag, this part cyanogen slag
In contain substantial amounts of pollutant, such as copper, arsenic, mercury and hypertoxic cyanide, especially containing certain mass（It is sub-）Iron cyaniding
Thing --- it is difficult to be oxidized processing.In addition to small part cyanogen slag can be utilized, a considerable amount of cyanogen slags can only be stored up
Disposal, not only occupies substantial amounts of land resource.And these cyanogen slags are it is also possible to polluted surface water, underground water and soil, right
Surrounding environment generates great potential safety hazard and environmentally friendly hidden danger.Traditional cyanogen dregs innocent treatment method is directed to（It is sub-）Iron cyaniding
The formed precipitations such as thing generally use ferrous salt, zinc salt and mantoquita, so as to reach the purpose of removal, but these methods are all deposited
Precipitating the too high weakness of unstable or processing cost.Therefore, gold mine enterprise is badly in need of seeking a kind of processing side of cyanogen slag
Method, cyanogen Slag treatment is at least met to the requirement of National Hazard waste judging standard.
The content of the invention
The present invention provides a kind of gold industry cyanogen Slag treatment method, can not meet National Hazard waste to solve cyanogen Slag treatment
The problem of judging standard requirement.
The present invention adopts the technical scheme that, comprises the following steps：
（1）, add into cyaniding tailing slurry the oxidating chemicals of certain mass, the easy release cyanogen in cyaniding tailing slurry is removed, cyanogen
Change and cyanogen and oxidating chemicals mass ratio are easily discharged in Tailings Slurry for 1:（3~20）, slurry pH, which was controlled in 8-12, reaction time, is
0.5h-2h；
（2）, add into the ore pulp after oxidation processes the acid of certain mass, by slurry pH control between 4-7；
（3）, add into ore pulp the ferrous sulfate of certain mass, and be passed through the air of certain mass, reaction time 0.5h-
1h；
（4）, using filter press by ore pulp carry out press filtration processing, the cyanogen slag after processing meet National Hazard waste judging standard will
Ask, press filtration filtrate recycle is in enterprise's production procedure.
The step（1）In, oxidating chemicals are using sodium pyrosulfite, sodium sulfite, SO2Gas, hydrogen peroxide, ozone or chlorine
It is oxidant；
The step（1）In, add sodium pyrosulfite, sodium sulfite and SO2Auxiliary air is needed to be aerated during gas, gas liquid ratio control
（3~10）:1.
The step（2）In, acid is sulfuric acid, hydrochloric acid, SO2Gas.
The step（3）In, ferrous sulfate dosage is according in ore pulp（It is sub-）The content of the iron cyanide is controlled, and sulfuric acid is sub-
Iron with（It is sub-）The mass ratio control of the iron cyanide exists（3~200）:1.
The step（3）In, the gas liquid ratio control of air and ore pulp exists（3~10）:1.
Beneficial effects of the present invention：For containing a large amount of hypertoxicity material cyanides in gold mine cyanidation tailings, to week
This case that the environment enclosed produces greatly safety and environmentally friendly hidden danger, using chemical precipitation and the principle of Oxidative demage, pass through elder generation
The processing mode precipitated after oxidation makes cyanogen Slag treatment to the requirement for meeting National Hazard waste judging standard.Traditional cyanogen slag is harmless
Change processing method to be directed to（It is sub-）The iron cyanide is typically chosen ferrous salt, zinc salt and mantoquita and handled, but ferrous salt removes
（It is sub-）The stability of the iron cyanide is not strong, and the cyanide being fixed in cyanogen slag easily returns molten phenomenon, is released back into liquid phase again
In, removed using zinc salt and mantoquita（It is sub-）The effect of the iron cyanide is preferable, but processing cost is higher.At traditional cyanogen slag harmlessness
Reason method is compared, the present invention be it is a kind of efficiently, efficiently cyanogen dregs innocent treatment method, have that processing cost is low, treatment effect
Stably, the advantages of simple to operate, and there is general applicability, it is easy to spread.
Embodiment
Embodiment 1
Comprise the following steps：
（1）The oxidating chemicals sodium pyrosulfite of certain mass is added into cyaniding tailing slurry, by the easy release in cyaniding tailing slurry
Cyanogen is removed, and cyanogen and oxidating chemicals quality are easily discharged in cyaniding tailing slurry than general control 1:3, slurry pH control is 8, reaction
Time is 0.5h；
（2）The acid of certain mass is added into the ore pulp after oxidation processes, slurry pH is controlled 4；
（3）The ferrous sulfate of certain mass is added into ore pulp, in ore pulp（It is sub-）The mass ratio control of the iron cyanide and ferrous sulfate
System is 1:3, and the air of certain mass is passed through, the gas liquid ratio of air and ore pulp is controlled 3:1, reaction time 0.5h；
（4）Ore pulp is carried out by press filtration processing using filter press, the cyanogen slag after processing meets wanting for National Hazard waste judging standard
Ask, press filtration filtrate recycle is in enterprise's production procedure；
The step（1）In, need auxiliary air to be aerated when adding sodium pyrosulfite, gas liquid ratio is controlled 3:1.
The step（2）In, acid is sulfuric acid.
Embodiment 2
Comprise the following steps：
（1）The oxidating chemicals sodium sulfite of certain mass is added into cyaniding tailing slurry, by the easy release cyanogen in cyaniding tailing slurry
Remove, cyanogen and oxidating chemicals quality are easily discharged in cyaniding tailing slurry than general control 1:12, slurry pH control is 10, reaction
Time is 1.5h；
（2）The acid of certain mass is added into the ore pulp after oxidation processes, slurry pH is controlled 5.5；
（3）The ferrous sulfate of certain mass is added into ore pulp, in ore pulp（It is sub-）The mass ratio control of the iron cyanide and ferrous sulfate
System is 1:100, and the air of certain mass is passed through, the gas liquid ratio of air and ore pulp is controlled 7:1, reaction time 0.8h；
（4）Ore pulp is carried out by press filtration processing using filter press, the cyanogen slag after processing meets wanting for National Hazard waste judging standard
Ask, press filtration filtrate recycle is in enterprise's production procedure；
The step（1）In, need auxiliary air to be aerated when adding sodium sulfite, gas liquid ratio is controlled 7:1.
The step（2）In, acid is hydrochloric acid.
Embodiment 3
Comprise the following steps：
（1）, add into cyaniding tailing slurry the oxidating chemicals SO of certain mass2Gas, by the easy release cyanogen in cyaniding tailing slurry
Remove, cyanogen and oxidating chemicals quality are easily discharged in cyaniding tailing slurry than general control 1:20, slurry pH control is 12, instead
It is 2h between seasonable；
（2）, add into the ore pulp after oxidation processes the acid of certain mass, slurry pH is controlled 7；
（3）, add into ore pulp the ferrous sulfate of certain mass, in ore pulp（It is sub-）The mass ratio control of the iron cyanide and ferrous sulfate
System is 1:200, and the air of certain mass is passed through, the gas liquid ratio of air and ore pulp is controlled 10:1, reaction time 1h；
（4）, using filter press by ore pulp carry out press filtration processing, the cyanogen slag after processing meet National Hazard waste judging standard will
Ask, press filtration filtrate recycle is in enterprise's production procedure；
The step（1）In, add SO2Auxiliary air is needed to be aerated during gas, gas liquid ratio is controlled 10:1；
The step（2）In, acid is SO2Gas.
The present invention is further illustrated by instantiation below.
Example 1
The content of total cyanide is about 900 mg/L in cyaniding tailing liquid phase caused by certain gold manufacturing enterprises, easily discharges cyanide
Content is about 150mg/L.Add 1.5g/L sodium pyrosulfite into enterprise's cyaniding tailing slurry first, while to cyaniding tailing slurry
Middle aeration, gas liquid ratio are controlled 5:1, reaction time 1.5h.Then it is using concentrated sulfuric acid regulation slurry pH to 7, dosage
0.5ml/L.After pH values of pulp to stabilization, 5g/L ferrous sulfate is added into ore pulp, while is aerated into cyaniding tailing slurry, gas liquid ratio
Control is 5:1, reaction time 0.5h.Reaction uses filter press that ore pulp is carried out into press filtration processing, the cyanogen slag after processing after terminating
（Moisture content about 20%）Indices have reached the requirement of National Hazard waste judging standard, press filtration filtrate in toxicity leachate
It is back to enterprise's production procedure.
Example 2
The content of total cyanide is about 340 mg/L in cyaniding tailing liquid phase caused by certain gold manufacturing enterprises, easily discharges cyanide
Content is about 180mg/L.Add 2.0g/L sodium pyrosulfite into enterprise's cyaniding tailing slurry first, while to cyaniding tailing slurry
Middle aeration, gas liquid ratio are controlled 5:1, reaction time 1.5h.Then using ferrous sulfate regulation slurry pH to 7, dosage
For 2.2 g/L.After pH values of pulp to stabilization, 1.0 g/L ferrous sulfate are added into ore pulp, while are aerated into cyaniding tailing slurry,
Gas liquid ratio is controlled 5:1, reaction time 0.5h.Reaction uses filter press that ore pulp is carried out into press filtration processing after terminating, after processing
Cyanogen slag（Moisture content about 20%）Indices have reached the requirement of National Hazard waste judging standard in toxicity leachate, pressure
Filtrate recycle is filtered in enterprise's production procedure.
Claims (6)
- A kind of 1. gold industry cyanogen Slag treatment method, it is characterised in that comprise the following steps：（1）, add into cyaniding tailing slurry the oxidating chemicals of certain mass, the easy release cyanogen in cyaniding tailing slurry is removed, cyanogen Change and cyanogen and oxidating chemicals mass ratio are easily discharged in Tailings Slurry for 1:（3~20）, slurry pH, which was controlled in 8-12, reaction time, is 0.5h-2h；（2）, add into the ore pulp after oxidation processes the acid of certain mass, by slurry pH control between 4-7；（3）, add into ore pulp the ferrous sulfate of certain mass, and be passed through the air of certain mass, reaction time 0.5h- 1h；（4）, using filter press by ore pulp carry out press filtration processing, the cyanogen slag after processing meet National Hazard waste judging standard will Ask, press filtration filtrate recycle is in enterprise's production procedure.
- A kind of 2. gold industry cyanogen Slag treatment method according to claim 1, it is characterised in that the step（1）In, oxygen Chemical drug agent is using sodium pyrosulfite, sodium sulfite, SO2Gas, hydrogen peroxide, ozone or chlorine system oxidant.
- A kind of 3. gold industry cyanogen Slag treatment method according to claim 2, it is characterised in that the step（1）In, throw Add sodium pyrosulfite, sodium sulfite and SO2Auxiliary air is needed to be aerated during gas, gas liquid ratio control exists（3~10）:1.
- A kind of 4. gold industry cyanogen Slag treatment method according to claim 1, it is characterised in that the step（2）In, acid For sulfuric acid, hydrochloric acid, SO2Gas.
- A kind of 5. gold industry cyanogen Slag treatment method according to claim 1, it is characterised in that the step（3）In, sulphur It is sour ferrous with（It is sub-）The mass ratio control of the iron cyanide exists（3~200）:1.
- A kind of 6. gold industry cyanogen Slag treatment method according to claim 1, it is characterised in that the step（3）In, it is empty The control of the gas liquid ratio of gas and ore pulp exists（3~10）:1.
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| CN201711052853.XA CN107597816A (en) | 2017-10-31 | 2017-10-31 | A kind of gold industry cyanogen Slag treatment method |
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| CN201711052853.XA CN107597816A (en) | 2017-10-31 | 2017-10-31 | A kind of gold industry cyanogen Slag treatment method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109675914A (en) * | 2019-01-30 | 2019-04-26 | 中城华宇（北京）矿业技术有限公司 | A kind of cyanidation tailings method for innocent treatment and device |
| CN113101591A (en) * | 2021-03-17 | 2021-07-13 | 东北大学 | Cyanide tailing decyanation method based on activated carbon catalytic oxidation |
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| CN104909491A (en) * | 2015-05-21 | 2015-09-16 | 长春黄金研究院 | Method for treating cyanide-containing tailing pulp of gold mine |
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- 2017-10-31 CN CN201711052853.XA patent/CN107597816A/en not_active Withdrawn
Patent Citations (7)
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|---|---|---|---|---|
| US6551514B1 (en) * | 1999-10-27 | 2003-04-22 | The Board Of Regents Of The University And Community College System Of Nevada | Cyanide detoxification process |
| CN101186405A (en) * | 2007-12-04 | 2008-05-28 | 甘晓明 | Closed circulation processing technique for cyanide-containing waste water |
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Cited By (2)
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|---|---|---|---|---|
| CN109675914A (en) * | 2019-01-30 | 2019-04-26 | 中城华宇（北京）矿业技术有限公司 | A kind of cyanidation tailings method for innocent treatment and device |
| CN113101591A (en) * | 2021-03-17 | 2021-07-13 | 东北大学 | Cyanide tailing decyanation method based on activated carbon catalytic oxidation |
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Application publication date: 20180119 |