CN101921034A - Recovery processing method for refining tail water with gold and silver - Google Patents
Recovery processing method for refining tail water with gold and silver Download PDFInfo
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- CN101921034A CN101921034A CN 201010255323 CN201010255323A CN101921034A CN 101921034 A CN101921034 A CN 101921034A CN 201010255323 CN201010255323 CN 201010255323 CN 201010255323 A CN201010255323 A CN 201010255323A CN 101921034 A CN101921034 A CN 101921034A
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Abstract
A recovery processing method for refining tail water with gold and silver belongs to the technical field of metallurgy; and the method mainly comprises the following steps: collecting the refining tail water; after settling, fetching the supernatant liquid waste and adding in the reducing agent for reducing potential; when the potential is reduced below +300mV, ending reducing; filtering and absorbing gold and silver in filter liquor with active carbon. In the recovery processing method for refining tail water, each work procedure is configured reasonably, thereby greatly reducing the gold content of discharged tail water; and the gold content is stable in index. Before processing, firstly naturally settling the tail water and intercepting much solid impurity and sediment; the put-in quantity of the reducing agent can be decreased so that the reduction reaction is more relatively sufficient; moreover, the later filtering pressure can be further reduced to prolong the cleaning period and the service life of the filtering device, thereby reducing labor quantity and saving cost.
Description
Technical field
The invention belongs to metallurgical technology field, be specifically related to a kind of recovery and treatment method of refining tail water with gold and silver.
Background technology
At present, the annual golden tail washings that contains that produces of the gold refinery that China is general reaches thousands of cubic meters, has both produced great environmental pollution, has also caused the loss of precious metal simultaneously.Bullion content instability in the refining tail water merely utilizes methods such as existing sedimentation, base metal reduction, charcoal absorption to be difficult to make it to reach emission request.Therefore, domestic most refinery usually can only be helplessly fixes on 3 high slightly～7g/m with the controlling index of gold content in the tail washings
3
Summary of the invention
The objective of the invention is for a kind of recovery and treatment method of refining tail water with gold and silver is provided.
For reaching above-mentioned purpose, the present invention has taked following technical scheme: the recovery and treatment method of refining tail water with gold and silver, and key step is: collect refining tail water, get supernatant waste liquid adding reductive agent after the sedimentation and carry out potential reduction; When potential drop to+reduction finished when 300mV was following, filter, with the gold and silver in the activated carbon adsorption filtrate.
Described reductive agent is zinc, iron, oxalic acid, formic acid, S-WAT, ferrous sulfate or sulfurous gas.
Reduction finishes after-filtration gained filtrate left standstill earlier 6～8 hours, carried out charcoal absorption then behind secondary filtration again.
Charcoal absorption comprises two sections absorption, and leading portion is vertical slot adverse current absorption from bottom to top, and back segment is through a plurality of series connection overflow absorption of rising as high as the banks.
Sedimentation, reduction after-filtration (can adopt vacuum filtration), leave standstill back secondary filtration (can adopt Plate Filtration) gained solid residue and return the refining flow process and handle again.
The presoak that described refining tail water produces when comprising the refining gold and silver, gold reduction back liquid or silver powder displaced liquid.
Refining tail water recovery and treatment method provided by the invention reasonably disposes each operation, greatly reduces the gold content of discharging tail washings, and the gold content index is stable.Make tail washings carry out natural subsidence before the processing earlier, hold back down a large amount of solid impurities and throw out, can either reduce the injected volume of reductive agent, and make reduction reaction more abundant, can also further alleviate the filter pressure in later stage, prolong the cleaning interval and the work-ing life of filtration unit, thereby reduce labor capacity, save cost.In addition, two-part absorption improves gold recovery, and the multiple-grooved series connection, and the gac life cycle prolongs.
Description of drawings
Fig. 1 is the process flow sheet of the inventive method.
Embodiment
The invention will be further described below in conjunction with the process flow sheet of Fig. 1.
The recovery and treatment method of refining tail water with gold and silver, step comprises:
(1) receiving tank sedimentation: refining tail waters such as the presoak that liquid chlorination process refining gold is produced, gold reduction back liquid are squeezed in the receiving tank sedimentation and more than 2 hours solid-state gold and the contamination precipitation that carries in the waste liquid are come out, and throw out returns the refining flow process.
(2) potential reduction: the supernatant waste liquid after the sedimentation is squeezed in the enamel still, added oxalic acid and carry out potential reduction; Survey the liquid current potential, when potential drop during to+300mV reduction finish.
(3) filter, leave standstill: after the vacuum filtration filter residue is returned the refining flow process, filtrate is squeezed into and is left standstill 6～8 hours in the dashpot, thereby makes reduction reaction more abundant, to greatest extent the reduction gold.
(4) secondary filtration: leave standstill back liquid and refilter through sheet frame, filter residue returns the refining flow process, and filtrate enters the charcoal absorption operation.
(6) charcoal absorption: two-part absorption, leading portion are vertical slot adverse current absorption from bottom to top, and back segment is the following current absorption of rising as high as the banks through four series connection overflows.
Handle gold refining tail water in applicant's enterprises this method on probation, randomly draw waste liquid sample after 9 processing in one month, detect gold content wherein, detected result sees Table 1.As can be seen from Table 1, the gold content in the waste liquid after this method is handled can stably maintain 1g/m
3Below, month selective examination mean value only is 0.41g/m
3, far below the general gold 3～7g/m of refinery
3The tail washings controlling index.To produce thousands of cubic metres of calculating of refining tail water per year, the gold recovery of enterprise is significantly improved, economic benefit is considerable, and very strong promotional value is arranged.
Table 1 is handled the random inspection result of back refining tail water
| The sampling numbering | Handle the back waste liquid and contain golden g/m 3 |
| 1 | 0.20 |
| 2 | 0.16 |
| 3 | 0.35 |
| 4 | 0.28 |
| 5 | 0.49 |
| 6 | 0.49 |
| 7 | 0.22 |
| 8 | 0.82 |
| 9 | 0.69 |
| On average: | 0.41 |
Claims (6)
1. the recovery and treatment method of refining tail water with gold and silver, key step is: collect refining tail water, get the supernatant waste liquid after the sedimentation and add reductive agent and carry out potential reduction; When potential drop to+reduction finished when 300mV was following, filter, with the gold and silver in the activated carbon adsorption filtrate.
2. recovery and treatment method as claimed in claim 1 is characterized in that, described reductive agent is zinc, iron, oxalic acid, formic acid, S-WAT, ferrous sulfate or sulfurous gas.
3. recovery and treatment method as claimed in claim 1 or 2 is characterized in that, reduction finishes after-filtration gained filtrate left standstill earlier 6～8 hours, carried out charcoal absorption then behind secondary filtration again.
4. recovery and treatment method as claimed in claim 3 is characterized in that, charcoal absorption comprises two sections absorption, and leading portion is vertical slot adverse current absorption from bottom to top, and back segment is a plurality of series connection overflow absorption of rising as high as the banks.
5. recovery and treatment method as claimed in claim 4 is characterized in that, sedimentation, reduction after-filtration, leaves standstill back secondary filtration gained solid residue and returns the refining flow process and handle.
6. as claim 4 or 5 described recovery and treatment methods, it is characterized in that the presoak that described refining tail water produces when comprising the refining gold and silver, gold reduction back liquid or silver powder displaced liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010255323 CN101921034A (en) | 2010-08-17 | 2010-08-17 | Recovery processing method for refining tail water with gold and silver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010255323 CN101921034A (en) | 2010-08-17 | 2010-08-17 | Recovery processing method for refining tail water with gold and silver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101921034A true CN101921034A (en) | 2010-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010255323 Pending CN101921034A (en) | 2010-08-17 | 2010-08-17 | Recovery processing method for refining tail water with gold and silver |
Country Status (1)
| Country | Link |
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| CN (1) | CN101921034A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194608A (en) * | 2013-04-19 | 2013-07-10 | 深圳市永丰源瓷业有限公司 | Method and system for recovering gold from production waste liquor |
| CN109839360A (en) * | 2019-01-23 | 2019-06-04 | 长春黄金研究院有限公司 | The measuring method of gold content in a kind of cyaniding tail washings |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2009093730A1 (en) * | 2008-01-21 | 2009-07-30 | Kabushiki Kaisha Toshiba | Method of recovering noble metals and recovering system for noble metals |
| CN101660048A (en) * | 2009-09-24 | 2010-03-03 | 无锡市霄鹰环境科技有限公司 | Multilevel processing technology for recovering and utilizing precious metal wastes or waste liquid |
-
2010
- 2010-08-17 CN CN 201010255323 patent/CN101921034A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| WO2009093730A1 (en) * | 2008-01-21 | 2009-07-30 | Kabushiki Kaisha Toshiba | Method of recovering noble metals and recovering system for noble metals |
| CN101660048A (en) * | 2009-09-24 | 2010-03-03 | 无锡市霄鹰环境科技有限公司 | Multilevel processing technology for recovering and utilizing precious metal wastes or waste liquid |
Non-Patent Citations (2)
| Title |
|---|
| 《内蒙古科技与经济》 20060515 曹忠等 "银电解废液回收工业化生产实践" 110-111 1-6 , 第9期 2 * |
| 《稀有金属材料与工程》 20050131 周全法等 "贵金属二次资源的回收利用现状和无害化处置设想" 7-11 1-6 第34卷, 第1期 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103194608A (en) * | 2013-04-19 | 2013-07-10 | 深圳市永丰源瓷业有限公司 | Method and system for recovering gold from production waste liquor |
| CN103194608B (en) * | 2013-04-19 | 2014-08-13 | 深圳市永丰源瓷业有限公司 | Method and system for recovering gold from production waste liquor |
| CN109839360A (en) * | 2019-01-23 | 2019-06-04 | 长春黄金研究院有限公司 | The measuring method of gold content in a kind of cyaniding tail washings |
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Open date: 20101222 |