CN101736159A - Method for recovering gold from alkaline waste water - Google Patents
Method for recovering gold from alkaline waste water Download PDFInfo
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- CN101736159A CN101736159A CN200910112482A CN200910112482A CN101736159A CN 101736159 A CN101736159 A CN 101736159A CN 200910112482 A CN200910112482 A CN 200910112482A CN 200910112482 A CN200910112482 A CN 200910112482A CN 101736159 A CN101736159 A CN 101736159A
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Abstract
The invention relates to a method for recovering gold from alkaline waste water. The gold is directly recovered from alkaline waste water with a sodium sulfite reduction agent and compressed air. The method comprises the following sequential process steps and conditions of: reduction: pouring alkaline waste water into a tank; introducing compressed air into the tank to carry out air stirring, adding 2-6% of sodium sulfite reduction agent, and raising temperature to 75-90 DEG C to carry out reduction reaction; settlement: discharging the liquid and solid mixture generated after the reduction reaction into a settling chamber to settle and separate into supernatant fluid and bottom particular gold; filtration: pumping the supernatant fluid into a filtering tank to carry out filter cloth filtration to filter liquor and filter slag, and discharging filter liquor into an environment-protection to treat and discharge after reaching standard; and smelting: smelting the settled bottom particle gold and the filtered settling slag, and producing gold dust. The invention has the advantages of simple operation, safe use, environment protection, high gold recovery rate, wide application and the like, and is suitable for golden smelting industry.
Description
One. technical field
The present invention relates to a kind of method that from alkaline waste water, reclaims gold, be suitable for gold smelting enterprise and use.
Two. background technology
Gold smelting enterprise generally adopts High Temperature High Pressure not have cyanogen parsing technology the golden charcoal that carries that the mining area produces is resolved, and its electrolytic solution tail washings is regularly discharged enters the environmental protection pond, and the environmental protection treatment difficulty is big.Is by analysis: the electrolytic solution tail washings alkalescence, still contains the surplus gold of 8～12mg/L, is to reclaim surplus gold the alkaline waste water from the electrolytic solution tail washings how therefore?
For addressing the above problem, Chinese patent CN86101940 discloses a kind of " absorption; the method for floatation recovery gold ", this method is as sorbent material with coal coke, in auriferous waste residue or waste liquid, adsorb, it is formed earlier carry golden charcoal, to carry in the froth product of golden charcoal flotation by flotation process adding diesel oil and No. 2 oil again, itself and flotation concentrate are mixed, smelt at last, thereby reclaim surplus gold, also have in containing golden many metal separation flotation, adopt prussiate be the dissolving of inhibitor with ore pulp in surplus gold reclaim, this method can reclaim golden, but has long flow path, complex process, the treatment facility investment is big, the high deficiency of medicament expense; Chinese patent CN101120107 also discloses a kind of " reclaiming the method for gold from gold-containing solution ", this method is to reclaim gold with gac from contain golden chloride soln, promptly allow gold-containing solution and gac contact with each other, the gold grain that will be adsorbed on again on the activated carbon surface separates with gac with the form of the gold ore of containing metal gold with physical separation method, this method belongs to carbon adsorption and reclaims gold, can reclaim gold, but have that the charcoal adsorption time is long, cost is high, also need further reclaim deficiency such as gold after the absorption with desorption technique.
Therefore, seek a kind of method that reclaims gold from alkaline waste water, it is very necessary to make that processing cost is low, simple to operate, environmental benefit well just seems.
Three. summary of the invention
The object of the present invention is to provide a kind of method that from alkaline waste water, reclaims gold, promptly overcome the shortcoming that gac reclaims golden long processing period, provide a kind of reductive agent that utilizes from alkaline medium, to reclaim golden method.
For finishing this task, the present invention carries out in the following way:
The method that reclaims gold from alkaline waste water of the present invention is to utilize reductive agent S-WAT and pressurized air directly to reclaim gold from alkaline waste water, and this method comprises following processing steps in sequence and condition:
(a) alkaline waste water is poured earlier in reduction in groove, feed pressurized air again and carry out air agitation in groove, stirred 15～20 minutes, add 2～6% reductive agent S-WAT then, be warming up to 75～90 ℃ and carry out reduction reaction, the reduction reaction time was controlled in 30 minutes;
(b) sedimentation, the liquid-solid mixture after reduction reaction finished drains into settling bowl and carries out sedimentation, is divided into supernatant liquor and bottom particulate gold;
(c) filter, supernatant liquor suction filter vat is carried out filter cloth filter, filter out filtrate and sediment, filtrate enters the environmental protection pond and handles back up to standard discharging;
(d) melting is carried out melting with settled bottom particulate gold and filtering sediment, the output gold mud.
Zn-containing cyanide barren solution three-step sedimentation processing technology of the present invention further comprises: the reductive agent S-WAT of adding 3～4% reduces.
The selected S-WAT of reductive agent of the present invention is because S-WAT reduces to gold-containing solution in the alkaline waste water, fast, the easily decomposition in alkaline waste water of speed of response, its product has than strong reducing property, adopt pressurized air to stir simultaneously, can reduce, reclaim the gold in the alkaline medium fast and efficiently.
Advantage of the present invention:
1. simple to operate, safe in utilization, environmental protection.
2. the reductive agent S-WAT is the production domesticization medicament easily purchased of market and cheap.
3. surplus gold recovery height can make to efflux tail washings Gold Content and reduce to about 2mg/L.
4. applied widely, be suitable for the recovery of surplus gold such as the high density noble liquid cyanide of dump leaching type gold mine, the expensive liquid of parsing that carries golden charcoal parsing technology, electrolysis tail washings.
Four. description of drawings
The concrete grammar of invention is provided by the following drawings.
Fig. 1 is a kind of method process flow sheet that reclaims gold from alkaline waste water that proposes according to the present invention.
Each sign expression in the accompanying drawing:
1. pressurized air 2. alkaline waste waters 3. reductive agent S-WATs 4. particulate gold 5. gold mud 6. sediments 7. filtrates
The present invention is described in further detail below in conjunction with accompanying drawing.
Five. embodiment
As shown in Figure 1, a kind of method that reclaims gold from alkaline waste water is to utilize reductive agent 3 S-WATs and pressurized air 1 directly to reclaim gold from alkaline waste water, and this method comprises following processing steps in sequence and condition:
(a) alkaline waste water 2 is poured earlier in reduction in groove, feed pressurized air 1 again and carry out air agitation in groove, stirred 15～20 minutes, add 2～6% reductive agent 3 S-WATs then, be warming up to 75～90 ℃ and carry out reduction reaction, the reduction reaction time was controlled in 30 minutes;
(b) sedimentation, the liquid-solid mixture after reduction reaction finished drains into settling bowl and carries out sedimentation, is divided into supernatant liquor and bottom particulate gold;
(c) filter, supernatant liquor suction filter vat is carried out filter cloth filter, filter out filtrate 7 and sediment 6, filtrate 7 enters the environmental protection pond and handles back up to standard discharging;
(d) melting is carried out melting, output gold mud 5 with settled bottom particulate gold and filtering sediment 6.
The air agitation intensity of described reducing process step is 25～28L/min.m
3
The filter cloth aperture of described filtration process step is 100～200 orders.
This method comprises that further reductive agent 3 S-WATs of adding 3～4% reduce.
% of the present invention is meant weight percent, L/min.m
3Be meant the volume of every cubic metre of per minute.
Embodiment one, two is aforesaid method of the present invention, only is medicament add-on and temperature of reaction difference to some extent, and the reduction ratio of surplus gold can reach more than 97% in the alkaline waste water.
Comparative Examples one is the disclosed method that reclaims gold from gold-containing solution of patent CN101120107, this method uses gac to reclaim gold from gold-containing solution, and the consumption of gac is a conventional amount used, and temperature of reaction is a normal temperature, do not do specific requirement, the rate of recovery of gold is less than 85%.
Comparative Examples two is the method for the disclosed absorption of patent CN86101940, floatation recovery gold, and this method uses charcoal absorption and flotation reagent diesel oil and No. 2 oil to reclaim gold from gold-containing solution, and temperature of reaction is a normal temperature, and the rate of recovery of gold is less than 90%.
The conditional effect of two embodiment of the present invention and two Comparative Examples of prior art is table look-up relatively
| Example | The gold way of recycling | Medicament kind | Medicament add-on (g/L) | Temperature of reaction (℃) | Gold recovery (%) |
| Embodiment one | The reductive agent reduction | S-WAT | ??4 | ??80 | ??97.31 |
| Embodiment two | The reductive agent reduction | S-WAT | ??3 | ??85 | ??97.20 |
| Comparative Examples one | Charcoal absorption | Gac | Convention amount | Normal temperature | ??＜85 |
| Comparative Examples two | Charcoal absorption, flotation | Coal coke, No. 2 oil of diesel oil | ??3～9Kg/t、??40～80g/t??40～80g/t | Normal temperature | ??＜90 |
Claims (4)
1. a method that reclaims gold from alkaline waste water is to utilize reductive agent (3) S-WAT and pressurized air (1) directly to reclaim gold from alkaline waste water, and this method comprises following processing steps in sequence and condition:
(a) reduction is poured alkaline waste water (2) into earlier in groove, feed pressurized air (1) again and carry out air agitation in groove, stirred 15～20 minutes, add 2～6% reductive agent (3) S-WAT then, be warming up to 75～90 ℃ and carry out reduction reaction, the reduction reaction time was controlled in 30 minutes;
(b) sedimentation, the liquid-solid mixture after reduction reaction finished drains into settling bowl and carries out sedimentation, is divided into supernatant liquor and bottom particulate gold;
(c) filter, supernatant liquor suction filter vat is carried out filter cloth filter, filter out filtrate (7) and sediment (6), filtrate (7) enters the environmental protection pond and handles back up to standard discharging;
(d) melting is carried out melting with settled bottom particulate gold and filtering sediment (6), the thick gold mud of output (5).
2. the method that reclaims gold from alkaline waste water according to claim 1, the air agitation intensity that it is characterized in that described reducing process step is 25～28L/min.m
3
3. the method that reclaims gold from alkaline waste water according to claim 1, the filter cloth aperture that it is characterized in that described filtration process step is 100～200 orders.
4. according to claim 1 or the 2 or 3 described methods that reclaim gold from alkaline waste water, this method comprises that further reductive agent (3) S-WAT of adding 3～4% reduces.
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| CN2009101124829A CN101736159B (en) | 2009-09-02 | 2009-09-02 | Method for recovering gold from alkaline waste water |
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| CN101736159B CN101736159B (en) | 2011-04-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517452A (en) * | 2011-12-09 | 2012-06-27 | 紫金矿业集团股份有限公司 | Method for recovering gold from gold-containing tail liquid produced by gold-loaded carbon desorption and electrodeposition technology |
| CN102978414A (en) * | 2012-11-28 | 2013-03-20 | 大连东泰产业废弃物处理有限公司 | Method for precipitating gold from cyanogen-containing gold-plated waste liquid |
| CN104254498A (en) * | 2012-03-20 | 2014-12-31 | 曼特尓斯矿业私人有限公司 | Treatment of acid mine drainage |
| CN105399237A (en) * | 2015-11-11 | 2016-03-16 | 紫金矿业集团股份有限公司 | Treatment method for copper-containing gold ore cyaniding waste water |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100424201C (en) * | 2006-03-01 | 2008-10-08 | 张勇 | Method for purifying golden and silver by fast wetting optimization |
| CN100562590C (en) * | 2007-11-08 | 2009-11-25 | 梁增扬 | A kind of rapid nontoxic gold extracting method |
| CN101451190A (en) * | 2007-11-30 | 2009-06-10 | 灵宝市金源矿业有限责任公司 | Novel method for separating gold and silver from gold mud |
| CN101328541B (en) * | 2008-07-27 | 2010-06-09 | 郴州市金贵银业股份有限公司 | Gold wet purification process |
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2009
- 2009-09-02 CN CN2009101124829A patent/CN101736159B/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102517452A (en) * | 2011-12-09 | 2012-06-27 | 紫金矿业集团股份有限公司 | Method for recovering gold from gold-containing tail liquid produced by gold-loaded carbon desorption and electrodeposition technology |
| CN104254498A (en) * | 2012-03-20 | 2014-12-31 | 曼特尓斯矿业私人有限公司 | Treatment of acid mine drainage |
| CN104254498B (en) * | 2012-03-20 | 2016-10-26 | 曼特尓斯矿业私人有限公司 | The process of acid ore deposit discharge |
| US9487419B2 (en) | 2012-03-20 | 2016-11-08 | Mintails Mining S A (Pty) Limited | Treatment of acid mine drainage |
| CN102978414A (en) * | 2012-11-28 | 2013-03-20 | 大连东泰产业废弃物处理有限公司 | Method for precipitating gold from cyanogen-containing gold-plated waste liquid |
| CN102978414B (en) * | 2012-11-28 | 2015-02-18 | 大连东泰产业废弃物处理有限公司 | Method for precipitating gold from cyanogen-containing gold-plated waste liquid |
| CN105399237A (en) * | 2015-11-11 | 2016-03-16 | 紫金矿业集团股份有限公司 | Treatment method for copper-containing gold ore cyaniding waste water |
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Effective date of registration: 20210319 Address after: 364200 No.100, QinGang Road, Nangang Industrial Zone, Shanghang County, Longyan City, Fujian Province Patentee after: ZIJIN MINING GROUP GOLD SMELTING Co.,Ltd. Address before: 364200 Zijin building, No. 1 Zijin Road, Shanghang County, Fujian Province Patentee before: ZIJIN MINING GROUP Co.,Ltd. |
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