CN101705506A - Technology for secondary recovery of gold from flotation tailings - Google Patents
Technology for secondary recovery of gold from flotation tailings Download PDFInfo
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- CN101705506A CN101705506A CN200910172643A CN200910172643A CN101705506A CN 101705506 A CN101705506 A CN 101705506A CN 200910172643 A CN200910172643 A CN 200910172643A CN 200910172643 A CN200910172643 A CN 200910172643A CN 101705506 A CN101705506 A CN 101705506A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention particularly discloses a technology for the secondary recovery of gold from flotation tailings, which comprises the following steps: conducting cyclone classification on ore pulp of the flotation tailings, grinding the cyclone-classified grit as crude ore, conducting ore pulp mixing on the ground ore powder, conducting cyanide leaching of gold, absorbing the leached gold by active carbon, desorbing gold-loaded carbon after saturated adsorption, and electrolyzing the desorption solution after desorption, thus obtaining gold powder. Unlike conventional processes, the technology only needs investment on the power cost of equipment and material cost instead of implementing pit discharging and pit loading by staff and vehicles, therefore, compared with the conventional treatment method, the technology has the characteristics of low cost, large treatment quantity, continuous operation and the capability of enhancing the ore dressing recovery rate by floatation technology to the maximum extent.
Description
Technical field
The present invention be specifically related to a kind of from flotation tailings the technology of gold secondary recovery.
Background technology
The flotation tailings grade is lower, fineness is poor, conventional from flotation tailings the technology of gold secondary recovery be generally and dig out mine tailing from the mine tailing storehouse and carry out the pond and soak and reclaim gold.This method shortcoming has three: the first, the cost height.The pond soak need manually go out the pond, the dress pond, and the flotation tailings grade relatively low be the major cause that causes cost high.The second, need medicament and oxygen fully to react during leaching and could generate the complexing gold, and the pond is soaked the last current downflow that only just relies on liquid and finished reaction process, cause reaction not exclusively, recovery rate in ore-dressing is low.The 3rd, the mine tailing amount after the flotation is bigger, and the treatment capacity that soak in the pond is limited, can not work continuously.
Therefore it is very necessary developing the technology of gold secondary recovery from flotation tailings that a kind of cost is low, recovery rate in ore-dressing is high, can work continuously.
Summary of the invention
For overcoming the deficiencies in the prior art part, the object of the present invention is to provide a kind of from flotation tailings the technology of gold secondary recovery.
For overcoming the deficiencies in the prior art part, the present invention has taked following technical scheme:
A kind of from flotation tailings the technology of gold secondary recovery: with the flotation tailings ore pulp through cyclone classification, the sand setting that screws out is regrinded as raw ore, breeze behind the mill is sized mixing, cyanide gold-leaching after sizing mixing, the gold charcoal absorption of leaching, adsorb saturated back gained and carry golden charcoal and send to desorb, the gained stripping liquid is sent to electrolysis and is got bronze after the desorb.
The stripping liquid that obtains after the electrolysis is back to the recycle of cyanide gold-leaching operation.
Bronze obtains gold containing material behind pyrometallurgical smelting.
The key problem in technology of technology of the present invention is the design of above-mentioned integrated artistic, and wherein the concrete operation of each that relates to all belongs to prior art, but can operate by following detailed process among the present invention:
Being milled to the weight percentage of particle diameter-200 purpose breeze in total breeze when sand setting is regrinded is 75～80%.
When sizing mixing, add alkaline matter and water in breeze, transferring to pH values of pulp is 10～11, and the breeze weight concentration is 45～50%.Alkaline matter can be calcium hydroxide or sodium hydroxide.
During cyanide gold-leaching, the addition that adds the sodium cyanide of 0.6～1.2kg with the breeze behind the mill per ton adds sodium cyanide, soaks 20～30 ℃ of golden temperature, soaks gold time 6～10h.
During desorb, used stripping liquid is to add the sodium cyanide (NaCN) of mass concentration 2% of water preparation and the sodium hydroxide (NaOH) of mass concentration 1%, desorption pressures 0.025Mpa, 85～130 ℃ of desorption temperatures.
During electrolysis, bath voltage 3～3.5V, cell current 500～700A, current density 8～15A/cm
2, 40～50 ℃ of electrolysis temperatures, electrolysis time 24～60h.
The present invention only needs the expenditure on power of used device and materials cost to get final product, needn't go out pond, dress pond with artificial and car as routine side, thereby the inventive method is lower than conventional processing method cost, treatment capacity is big, and, can improve the floatation process recovery rate in ore-dressing to greatest extent for working continuously.
Description of drawings
Accompanying drawing is a process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited thereto.
Embodiment 1
As shown in drawings, with the flotation tailings ore pulp through cyclone classification, overflow is directly discharged, the sand setting that screws out is regrinded as raw ore, being milled to the weight percentage of particle diameter-200 purpose breeze in total breeze is 78%, add calcium hydroxide and water in the breeze behind mill, transferring to pH values of pulp is 10.5, and the breeze weight concentration is 47%, consumption interpolation sodium cyanide with the adding of the breeze behind the mill per ton 0.9kg sodium cyanide carries out cyanide gold-leaching afterwards, soak 25 ℃ of golden temperature, soak gold time 8h, the gold charcoal absorption of leaching, adsorbing saturated back gained carries golden charcoal and sends to desorb, used stripping liquid is to add the NaCN of mass concentration 2% of water preparation and the NaOH of mass concentration 1%, desorption pressures 0.025Mpa, 105 ℃ of desorption temperatures, the gained stripping liquid gets bronze through electrolysis again after the desorb, bath voltage 3.3V, cell current 600A, current density 12A/cm
2, 43 ℃ of electrolysis temperatures, electrolysis time 40h, after the electrolysis, the stripping liquid of acquisition is back to the recycle of cyanide gold-leaching operation, and the bronze of acquisition obtains gold containing material behind pyrometallurgical smelting.
In the present embodiment, the sand setting grade is 0.49 gram/ton during selected, leaching back tailings grade is 0.32 gram/ton, leaching yield reaches 34.69%, if reclaim gold according to existing leaching process, leaching back tailings taste is 0.35 gram/ton, therefore, the recovery rate in ore-dressing of technology of the present invention will be higher than leaching process, and technology of the present invention can make golden total yield improve about 2%.The correlation technique index is as shown in the table:
The key technical indexes
| Project | Head grade (g/t) | Tailings grade (g/t) | The rate of recovery (%) |
| Before the transformation | ??4.27 | ??0.40 | ??90.63 |
| After soak in the pond | ??4.27 | ??0.35 | ??91.80 |
| The present invention | ??4.27 | ??0.32 | ??92.51 |
Embodiment 2
As shown in drawings, with the flotation tailings ore pulp through cyclone classification, overflow is directly discharged, the sand setting that screws out is regrinded as raw ore, being milled to the weight percentage of particle diameter-200 purpose breeze in total breeze is 75%, add calcium hydroxide and water in the breeze behind mill, transferring to pH values of pulp is 10, and the breeze weight concentration is 45%, consumption interpolation sodium cyanide with the adding of the breeze behind the mill per ton 0.6kg sodium cyanide carries out cyanide gold-leaching afterwards, soak 20 ℃ of golden temperature, soak gold time 6h, the gold charcoal absorption of leaching, adsorbing saturated back gained carries golden charcoal and sends to desorb, used stripping liquid is to add the NaCN of mass concentration 2% of water preparation and the NaOH of mass concentration 1%, desorption pressures 0.025Mpa, 85 ℃ of desorption temperatures, the gained stripping liquid gets bronze through electrolysis again after the desorb, bath voltage 3V, cell current 500A, current density 8A/cm
2, 40 ℃ of electrolysis temperatures, electrolysis time 24h, after the electrolysis, the stripping liquid of acquisition is back to the recycle of cyanide gold-leaching operation, and the bronze of acquisition obtains gold containing material behind pyrometallurgical smelting.
Embodiment 3
As shown in drawings, with the flotation tailings ore pulp through cyclone classification, overflow is directly discharged, the sand setting that screws out is regrinded as raw ore, being milled to the weight percentage of particle diameter-200 purpose breeze in total breeze is 80%, add sodium hydroxide and water in the breeze behind mill, transferring to pH values of pulp is 11, and the breeze weight concentration is 50%, consumption interpolation sodium cyanide with the adding of the breeze behind the mill per ton 1.2kg sodium cyanide carries out cyanide gold-leaching afterwards, soak 30 ℃ of golden temperature, soak gold time 10h, the gold charcoal absorption of leaching, adsorbing saturated back gained carries golden charcoal and sends to desorb, used stripping liquid is to add the NaCN of mass concentration 2% of water preparation and the NaOH of mass concentration 1%, desorption pressures 0.025Mpa, 130 ℃ of desorption temperatures, the gained stripping liquid gets bronze through electrolysis again after the desorb, bath voltage 3.5V, cell current 700A, current density 15A/cm
2, 50 ℃ of electrolysis temperatures, electrolysis time 60h, after the electrolysis, the stripping liquid of acquisition is back to the recycle of cyanide gold-leaching operation, and the bronze of acquisition obtains gold containing material behind pyrometallurgical smelting.
Claims (8)
1. the technology of a gold secondary recovery from flotation tailings, it is characterized in that: with the flotation tailings ore pulp through cyclone classification, the sand setting that screws out is regrinded as raw ore, breeze behind the mill is sized mixing, cyanide gold-leaching after sizing mixing, the gold charcoal absorption of leaching is adsorbed saturated gained afterwards and is carried golden charcoal and send to desorb, and the gained stripping liquid is sent to electrolysis and got bronze after the desorb.
2. as claimed in claim 1 from flotation tailings the technology of gold secondary recovery, it is characterized in that: the stripping liquid that obtains after the electrolysis is back to the recycle of cyanide gold-leaching operation.
3. as claimed in claim 2 from flotation tailings the technology of gold secondary recovery, it is characterized in that: bronze obtains gold containing material behind pyrometallurgical smelting.
As claim 1～3 any one described from flotation tailings the technology of gold secondary recovery, it is characterized in that: being milled to the weight percentage of particle diameter-200 purpose breeze in total breeze when sand setting is regrinded is 75～80%.
As claim 1～3 any one described from flotation tailings the technology of gold secondary recovery, it is characterized in that: when sizing mixing, add alkaline matter and water in breeze, transferring to pH values of pulp is 10～11, and the breeze weight concentration is 45～50%.
As claim 1～3 any one described from flotation tailings the technology of gold secondary recovery, it is characterized in that: during cyanide gold-leaching, the addition that adds the sodium cyanide of 0.6～1.2kg with the breeze behind the mill per ton adds sodium cyanide, soaks 20～30 ℃ of golden temperature, soaks gold time 6～10h.
As claim 1～3 any one described from flotation tailings the technology of gold secondary recovery, it is characterized in that: during desorb, used stripping liquid is to add the sodium cyanide of mass concentration 2% of water preparation and the sodium hydroxide of mass concentration 1%, desorption pressures 0.025Mpa, 85～130 ℃ of desorption temperatures.
As claim 1～3 any one described from flotation tailings the technology of gold secondary recovery, it is characterized in that: during electrolysis, bath voltage 3～3.5V, cell current 500～700A, current density 8～15A/cm
2, 40～50 ℃ of electrolysis temperatures, electrolysis time 24～60h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910172643A CN101705506A (en) | 2009-11-19 | 2009-11-19 | Technology for secondary recovery of gold from flotation tailings |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910172643A CN101705506A (en) | 2009-11-19 | 2009-11-19 | Technology for secondary recovery of gold from flotation tailings |
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| CN101705506A true CN101705506A (en) | 2010-05-12 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808084A (en) * | 2012-08-14 | 2012-12-05 | 云南大学 | Method for enriching platinum and palladium from pressurized cyanating solution |
| CN104087747A (en) * | 2014-04-21 | 2014-10-08 | 云南黄金矿业集团股份有限公司 | Method for desorbing valuable metals from gold loaded carbon |
| CN104232908A (en) * | 2014-09-17 | 2014-12-24 | 河南省岩石矿物测试中心 | Method for recovering gold from gold-containing mercury smelting tailings |
| CN104258977A (en) * | 2014-08-06 | 2015-01-07 | 哈巴河金坝矿业有限公司 | Regrinding and rescreening method and device of gold floating tailings |
| CN104624363A (en) * | 2014-12-11 | 2015-05-20 | 江西一元再生资源有限公司 | Method for recovering gold, antimony and lead from floatation tailings |
| CN104818391A (en) * | 2015-04-22 | 2015-08-05 | 云南黄金矿业集团股份有限公司 | Method for extracting gold from gold-containing oxidized ore |
| CN108660482A (en) * | 2018-02-26 | 2018-10-16 | 山东黄金归来庄矿业有限公司 | It is adsorbed in the extracting method of the noble metal of column-shaped active carbon |
| CN109136561A (en) * | 2018-07-15 | 2019-01-04 | 长春黄金研究院有限公司 | The method of Gold Concentrate under Normal Pressure biological oxidation gold extraction enterprise cyanidation tailings high-pressure washing recycling gold |
| CN111893299A (en) * | 2020-08-03 | 2020-11-06 | 玉门市昌源矿业有限公司 | Chemical formula for recycling tailings and gold extraction process |
| CN112593073A (en) * | 2020-11-17 | 2021-04-02 | 湖南仁发材料科技有限公司 | Method for recovering valuable metal minerals in tin tailings |
| WO2023108226A1 (en) * | 2021-12-17 | 2023-06-22 | Newcrest Mining Limited | Recovering gold |
-
2009
- 2009-11-19 CN CN200910172643A patent/CN101705506A/en active Pending
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102808084B (en) * | 2012-08-14 | 2014-04-02 | 云南大学 | Method for enriching platinum and palladium from pressurized cyanating solution |
| CN102808084A (en) * | 2012-08-14 | 2012-12-05 | 云南大学 | Method for enriching platinum and palladium from pressurized cyanating solution |
| CN104087747B (en) * | 2014-04-21 | 2017-07-14 | 云南黄金矿业集团股份有限公司 | The method that valuable metal is desorbed from gold loaded carbon |
| CN104087747A (en) * | 2014-04-21 | 2014-10-08 | 云南黄金矿业集团股份有限公司 | Method for desorbing valuable metals from gold loaded carbon |
| CN104258977A (en) * | 2014-08-06 | 2015-01-07 | 哈巴河金坝矿业有限公司 | Regrinding and rescreening method and device of gold floating tailings |
| CN104232908A (en) * | 2014-09-17 | 2014-12-24 | 河南省岩石矿物测试中心 | Method for recovering gold from gold-containing mercury smelting tailings |
| CN104624363A (en) * | 2014-12-11 | 2015-05-20 | 江西一元再生资源有限公司 | Method for recovering gold, antimony and lead from floatation tailings |
| CN104624363B (en) * | 2014-12-11 | 2015-09-09 | 江西一元再生资源有限公司 | A kind of method of comprehensive recovery of gold, antimony, lead from flotation tailing |
| CN104818391A (en) * | 2015-04-22 | 2015-08-05 | 云南黄金矿业集团股份有限公司 | Method for extracting gold from gold-containing oxidized ore |
| CN108660482A (en) * | 2018-02-26 | 2018-10-16 | 山东黄金归来庄矿业有限公司 | It is adsorbed in the extracting method of the noble metal of column-shaped active carbon |
| CN109136561A (en) * | 2018-07-15 | 2019-01-04 | 长春黄金研究院有限公司 | The method of Gold Concentrate under Normal Pressure biological oxidation gold extraction enterprise cyanidation tailings high-pressure washing recycling gold |
| CN111893299A (en) * | 2020-08-03 | 2020-11-06 | 玉门市昌源矿业有限公司 | Chemical formula for recycling tailings and gold extraction process |
| CN112593073A (en) * | 2020-11-17 | 2021-04-02 | 湖南仁发材料科技有限公司 | Method for recovering valuable metal minerals in tin tailings |
| WO2023108226A1 (en) * | 2021-12-17 | 2023-06-22 | Newcrest Mining Limited | Recovering gold |
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Open date: 20100512 |