CN101798631A - Method for extracting gold from gold-concentration flotation tailings - Google Patents
Method for extracting gold from gold-concentration flotation tailings Download PDFInfo
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- CN101798631A CN101798631A CN201010150358A CN201010150358A CN101798631A CN 101798631 A CN101798631 A CN 101798631A CN 201010150358 A CN201010150358 A CN 201010150358A CN 201010150358 A CN201010150358 A CN 201010150358A CN 101798631 A CN101798631 A CN 101798631A
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- gold
- rich solution
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- flotation tailings
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
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Abstract
The invention relates to a method for extracting gold from tailings, in particular to a method for extracting gold from gold-concentration flotation tailings. The method is characterized by comprising the following steps of: piling the tailings, and adding an auxiliary leaching agent and quick lime into ore piles, wherein the pile height is 3 to 10 meters; sprinkling the ore piles till the water-absorption of the ore piles is saturated; introducing pure oxygen to rich solution obtained after sprinkling, and adding sodium cyanide into the rich solution so as to make the oxygen content of the rich solution exceed 10mg/L and the cyanogen content of the rich solution to 2 to 3mg/L; adsorbing the rich solution by active carbon, recovering the gold adsorbed on gold-loaded carbon by a desorption electrolysis method, and returning the liquid obtained after reaction to the step 2 for cyclic utilization; and when the gold content of the leaching rich solution is below 0.3mg/L, ending the leaching, and unloading. The method has the advantages of effectively improving the permeability and the oxygen content of the ore piles, providing oxygen and ensuring an alkali condition for gold extraction, along with low cost, high gold yield and the like.
Description
Technical field
The present invention relates to from mine tailing, extract the method for gold, specifically adopt no granulation cyanide heap leaching method from gold-concentration flotation tailings, to extract the method for gold.
Background technology
As everyone knows, the method for extracting at present gold from gold-concentration flotation tailings is a lot, but mainly take the cyanide heap leaching method as main, mine tailing cyanide heap leaching method is at first granulated mine tailing and is built heap or directly to build heap, and the heap height is generally at 3 meters ~ 10 meters, heap build complete after, under alkali condition, spray, by NaCN, O
2And H
2The effect of O forms water-soluble gold (silver) cyano complex [Au (CN)
2]
-([Ag (CN)
2]
-) process, react as follows:
2Au+4NaCN+ O
2+H
2O=2NaAu(CN)
2+2NaOH
Adopt gac or resin to adsorb to the golden rich solution that contains that is obtained then, in this process, in certain temperature range, the leaching yield of gold depends on prussiate and concentration of oxygen, concentration of cyanide can be controlled in 3/0,000 in heap leaching process, but often because build stack height, cause dissolved oxygen content deficiency in the heap of ore deposit, and then cause leaching yield to descend, especially soak mine tailing for the difficulty that contains base-metal ion and oxide compound, the existence of these impurity has seriously hindered golden cyaniding leaches, mass consumption oxygen and prussiate, and this class mine tailing does not have the granulation cyanide heap leaching rate of recovery all below 50% according to statistics.
Summary of the invention
The objective of the invention is to overcome above-mentioned the deficiencies in the prior art, under the situation that does not increase other production facility, a kind of influence that can significantly reduce base metal and oxide compound is provided, increases dissolved oxygen amount, improves the method for from gold-concentration flotation tailings, extracting gold of the golden cyaniding rate of recovery.
The present invention can reach by following measure:
A kind of method of extracting gold from gold-concentration flotation tailings is characterized in that comprising the steps:
Step 1: mine tailing is built heap, and the heap height is 3-10m, adds leaching agent and unslaked lime simultaneously in the heap of ore deposit,
Step 2: spray, the ore deposit heap is sprayed, make the ore deposit pile saturated suction,
Step 3: rich solution fills pure oxygen, the rich solution that sprays the back gained is filled pure oxygen, and add sodium cyanide in rich solution, makes its oxygen level more than or equal to 10mg/L, and containing the cyanogen amount is 2 ~ 3/0,000,
Step 4: absorption is reclaimed, and adopts active carbon to adsorb to the gained rich solution, and adopts the method for desorbing electrolytic to reclaim to the gold that is adsorbed onto in the gold loaded carbon, after the reaction gained liquid return carry out in the step 2 recycling,
Step 5: when the Gold grade that leaches rich solution is lower than 0.3mg/L, leaches and finish, unload heap.
Leaching agent described in the step 1 of the present invention can adopt calcium peroxide, and its consumption and mine tailing weight ratio are 100-200g/t, and it act as the alkaline environment that guarantees leaching process, thereby improves the cyaniding rate of recovery of gold.
The granularity of the unslaked lime described in the step 1 of the present invention should be less than 3 ㎝, and its consumption and mine tailing weight ratio are 4-7kg/t.
Spray is 1:2 with spray time ratio intermittently in the step 2 of the present invention, thereby unslaked lime and water complete reaction in the heap of assurance ore deposit generate calcium hydroxide, and making and leaching rich solution is alkalescence.
Can in rich solution, add calcium hydroxide in the step 3 of the present invention, more than or equal to 10, guarantee the alkaline environment that leaches, and then reach the purpose that improves gold leaching rate with the pH value that guarantees liquid.
Oxygen content when liquid in the step 3 of the present invention is lower than 2mg/L, can fill pure oxygen, if the liquid containing oxygen amount is still not high after filling pure oxygen, should reduces and build stack height.
The present invention is by adding granularity less than 3 centimetres of quick limes when tailing heap is built, and quick lime is absorbed water, make its reaction generate alkaline matter, reach the purpose of the alkaline environment that guarantees reaction, while quick lime release heat in course of reaction, improve to a certain extent extraction temperature, and expand during the quick lime release heat, make the ore deposit heap produce the slight changing of the relative positions, increase the permeability of ore deposit heap, the reaction calcium hydroxide that generates, play the effect of precipitation base metal and oxide, can eliminate objectionable impurities to the impact of Cyanide Leaching, reduce the consumption of oxygen and cyanide, in addition, in building the process of heap, mine tailing also adds the leaching agent calper calcium peroxide, and in leaching process, chronicity provides oxygen and calcium hydroxide, to improve permeability and the oxygen content of ore deposit heap, oxygen is provided and guarantees alkali condition for gold leaches, thereby improve the golden cyaniding rate of recovery, obtain preferably economic and technical norms, it is low to have a cost, the high significant advantage of gold leaching efficiency.
Embodiment:
Below the present invention is further described:
A kind of method of extracting gold from gold-concentration flotation tailings is characterized in that comprising the steps:
Step 1: mine tailing is built heap, and the heap height is 3-10m, adds leaching agent and unslaked lime simultaneously in the heap of ore deposit,
Step 2: spray, the ore deposit heap is sprayed, make the ore deposit pile saturated suction,
Step 3: rich solution fills pure oxygen, the rich solution that sprays the back gained is filled pure oxygen, and add sodium cyanide in rich solution, makes its oxygen level more than or equal to 10mg/L, and containing the cyanogen amount is 2 ~ 3/0,000,
Step 4: absorption is reclaimed, and adopts active carbon to adsorb to the gained rich solution, and adopts the method for desorbing electrolytic to reclaim to the gold that is adsorbed onto in the gold loaded carbon, after the reaction gained liquid return carry out in the step 2 recycling,
Step 5: when the Gold grade that leaches rich solution is lower than 0.3mg/L, leaches and finish, unload heap.
Leaching agent described in the step 1 of the present invention can adopt calcium peroxide, and its consumption and mine tailing weight ratio are 100g/t-200g/t, and it act as the alkaline environment that guarantees leaching process, thereby improves the cyaniding rate of recovery of gold.
The granularity of the unslaked lime described in the step 1 of the present invention should be less than 3 ㎝, and its consumption and mine tailing weight ratio are 4kg/t-7kg/t.
Spray is 1:2 with spray time ratio intermittently in the step 2 of the present invention, thereby unslaked lime and water complete reaction in the heap of assurance ore deposit generate calcium hydroxide, and making and leaching rich solution is alkalescence.
Can in rich solution, add calcium hydroxide in the step 3 of the present invention, more than or equal to 10, guarantee the alkaline environment that leaches, and then reach the purpose that improves gold leaching rate with the pH value that guarantees liquid.
Oxygen content when liquid in the step 3 of the present invention is lower than 2mg/L, can fill pure oxygen, if the liquid containing oxygen amount is still not high after filling pure oxygen, should reduces and build stack height.
The present invention is by adding granularity less than 3 centimetres of quick limes when tailing heap is built, and quick lime is absorbed water, make its reaction generate alkaline matter, reach the purpose of the alkaline environment that guarantees reaction, while quick lime release heat in course of reaction, improve to a certain extent extraction temperature, and expand during the quick lime release heat, make the ore deposit heap produce the slight changing of the relative positions, increase the permeability of ore deposit heap, the reaction calcium hydroxide that generates, play the effect of precipitation base metal and oxide, can eliminate objectionable impurities to the impact of Cyanide Leaching, reduce the consumption of oxygen and cyanide, in addition, in building the process of heap, mine tailing also adds the leaching agent calper calcium peroxide, and in leaching process, chronicity provides oxygen and calcium hydroxide, to improve permeability and the oxygen content of ore deposit heap, oxygen is provided and guarantees alkali condition for gold leaches, thereby improve the golden cyaniding rate of recovery, obtain preferably economic and technical norms, it is low to have a cost, the high significant advantage of gold leaching efficiency.
Claims (5)
1. a method of extracting gold from gold-concentration flotation tailings is characterized in that comprising the steps:
Step 1: mine tailing is built heap, and the heap height is 3-10m, adds leaching agent and unslaked lime simultaneously in the heap of ore deposit,
Step 2: spray, the ore deposit heap is sprayed, make the ore deposit pile saturated suction,
Step 3: rich solution fills pure oxygen, the rich solution that sprays the back gained is filled pure oxygen, and add sodium cyanide in rich solution, makes its oxygen level more than or equal to 10mg/L, and containing the cyanogen amount is 2 ~ 3/0,000,
Step 4: absorption is reclaimed, and adopts active carbon to adsorb to the gained rich solution, and adopts the method for desorbing electrolytic to reclaim to the gold that is adsorbed onto in the gold loaded carbon, after the reaction gained liquid return carry out in the step 2 recycling,
Step 5: when the Gold grade that leaches rich solution is lower than 0.3mg/L, leaches and finish, unload heap.
2. a kind of method of extracting gold from gold-concentration flotation tailings according to claim 1 is characterized in that the leaching agent described in the step 1 adopts calcium peroxide, and its consumption and mine tailing weight ratio are 100g/t-200g/t.
3. a kind of method of extracting gold from gold-concentration flotation tailings according to claim 1 is characterized in that the granularity of the unslaked lime described in the step 1 should be less than 3 ㎝, and its consumption and mine tailing weight ratio are 4-7kg/t.
4. a kind of method of extracting gold from gold-concentration flotation tailings according to claim 1 it is characterized in that spray is 1:2 with spray time ratio intermittently in the step 2, and circulation fluid is filled pure oxygen.
5. a kind of method of extracting gold from gold-concentration flotation tailings according to claim 1 is characterized in that adding calcium hydroxide in rich solution in step 3, to guarantee pH value 〉=10 of liquid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010150358A CN101798631A (en) | 2010-04-20 | 2010-04-20 | Method for extracting gold from gold-concentration flotation tailings |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010150358A CN101798631A (en) | 2010-04-20 | 2010-04-20 | Method for extracting gold from gold-concentration flotation tailings |
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| CN101798631A true CN101798631A (en) | 2010-08-11 |
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| CN201010150358A Pending CN101798631A (en) | 2010-04-20 | 2010-04-20 | Method for extracting gold from gold-concentration flotation tailings |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251123A (en) * | 2011-06-28 | 2011-11-23 | 广西地博矿业集团股份有限公司 | Gold extraction process of refractory gold ore |
| CN104498730A (en) * | 2014-12-03 | 2015-04-08 | 云南黄金矿业集团股份有限公司 | Method for processing low-grade gold ore |
| 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 |
| CN105567993A (en) * | 2015-12-29 | 2016-05-11 | 安徽牛山新型材料科技有限公司 | Beneficiation method for low grade oxidized type gold and silver contained tailings |
| CN106498179A (en) * | 2016-10-26 | 2017-03-15 | 王瑞 | Molten gold tailings, low grade gold ore gold-extraction process are soaked in a kind of oxygen-enriched environmental protection |
| CN106834733A (en) * | 2015-12-03 | 2017-06-13 | 北京有色金属研究总院 | A kind of utilization barren rock and the granulating and heap-leaching technique containing golden mine tailing |
Citations (5)
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| CN1099071A (en) * | 1992-07-29 | 1995-02-22 | Fmc黄金公司 | Reclaim the method for precious metal values from difficult ore |
| CN1101948A (en) * | 1994-06-29 | 1995-04-26 | 四川联合大学 | Method for raising cyaniding extraction rate and recovery percent of carbonaceous gold ore by compound inhibitor |
| CN1226605A (en) * | 1999-02-10 | 1999-08-25 | 昆明理工大学 | Technology for gold extraction by cyanide process with mixed auxiliary |
| CN1554785A (en) * | 2003-12-23 | 2004-12-15 | 王金祥 | Chemical bulk stack dipping process for gold-containing tailing ore without pelletizing |
| CN101250623A (en) * | 2008-03-10 | 2008-08-27 | 中国黄金集团公司技术中心 | Biological heap leaching metal technique for low grade unwieldiness gold ore |
-
2010
- 2010-04-20 CN CN201010150358A patent/CN101798631A/en active Pending
Patent Citations (5)
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| CN1099071A (en) * | 1992-07-29 | 1995-02-22 | Fmc黄金公司 | Reclaim the method for precious metal values from difficult ore |
| CN1101948A (en) * | 1994-06-29 | 1995-04-26 | 四川联合大学 | Method for raising cyaniding extraction rate and recovery percent of carbonaceous gold ore by compound inhibitor |
| CN1226605A (en) * | 1999-02-10 | 1999-08-25 | 昆明理工大学 | Technology for gold extraction by cyanide process with mixed auxiliary |
| CN1554785A (en) * | 2003-12-23 | 2004-12-15 | 王金祥 | Chemical bulk stack dipping process for gold-containing tailing ore without pelletizing |
| CN101250623A (en) * | 2008-03-10 | 2008-08-27 | 中国黄金集团公司技术中心 | Biological heap leaching metal technique for low grade unwieldiness gold ore |
Non-Patent Citations (1)
| Title |
|---|
| 聂树人: "《难选冶金矿石浸金》", 31 August 1997 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102251123A (en) * | 2011-06-28 | 2011-11-23 | 广西地博矿业集团股份有限公司 | Gold extraction process of refractory gold ore |
| CN104498730A (en) * | 2014-12-03 | 2015-04-08 | 云南黄金矿业集团股份有限公司 | Method for processing low-grade gold ore |
| 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 |
| CN106834733A (en) * | 2015-12-03 | 2017-06-13 | 北京有色金属研究总院 | A kind of utilization barren rock and the granulating and heap-leaching technique containing golden mine tailing |
| CN105567993A (en) * | 2015-12-29 | 2016-05-11 | 安徽牛山新型材料科技有限公司 | Beneficiation method for low grade oxidized type gold and silver contained tailings |
| CN106498179A (en) * | 2016-10-26 | 2017-03-15 | 王瑞 | Molten gold tailings, low grade gold ore gold-extraction process are soaked in a kind of oxygen-enriched environmental protection |
| CN106498179B (en) * | 2016-10-26 | 2018-06-22 | 王瑞 | A kind of molten gold tailings of oxygen-enriched environmentally protective leaching, low grade gold ore gold-extraction process |
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Application publication date: 20100811 |