CN1153219A - Method for extraction of gold from coal-oil gold-carried aggregate (gold chamber) - Google Patents
Method for extraction of gold from coal-oil gold-carried aggregate (gold chamber) Download PDFInfo
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- CN1153219A CN1153219A CN95121617A CN95121617A CN1153219A CN 1153219 A CN1153219 A CN 1153219A CN 95121617 A CN95121617 A CN 95121617A CN 95121617 A CN95121617 A CN 95121617A CN 1153219 A CN1153219 A CN 1153219A
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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
A method for extracting gold from the coal-oil aggregate carrying gold features that an extractant liquid prepared from complex, catalyst, oxidant, additive, protecting agent and pH regulator is used, and comprises extracting gold with said extractant liquid, use of reducer to deposit gold, silver and copper, filtering the deposit, calcininjg to desulfurize, separation of gold by nitric acid, smelting gold powder into gold ingot, recovering copper nitrate from filtrate, and recovering silver by precipitation with sodium chloride. Its advantages are simple apparatus, no toxic pollution, no gold escape in calcining, and high recovery of gold (95-99%).
Description
The present invention belongs to a method for recovering gold
The invention discloses a post-treatment method of ZL9111642.2 gold-carrying agglomerates, which removes carbon and oil by a combustion method and then carries out smelting by a pyrometallurgical method or a pyrometallurgical method to obtain alloy gold. The gold can also be roasted at the temperature of 550 plus 650 ℃, carbon and oil are removed by burning, gold is recovered by a wet method by using a chlorination method after roasting ash is reground, but the treatment temperature after the burning method is not easy to control, fine-grained gold is easy to escape along with air flow, strict dust collection equipment is required to reduce loss, a CARBAO method is adopted abroad, the equipment investment is large, heavy liquid with organic solvent has high toxicity, the operation is inconvenient, and the method is not suitable for small and medium-sized gold agglomeration method gold extraction plants. The invention develops a method for releasing gold from coal-oil gold-loaded aggregates (gold rooms) on the basis of ZL 91112642.2.
The invention aims to provide a method for releasing gold in coal-oil gold-loaded agglomerates (gold chambers), which is mainly used for releasing gold by adopting a releasing liquid compounded by a complexing agent, a catalyst, an oxidant, an additive, a protective agent and a pH regulator. The process flow is as follows: gold removing liquid → precipitation → gold separation by nitric acid → filtration → gold → recovery of copper and silver in the filtrate. The method has simple equipment, the gold recovery rate reaches more than 98 percent, and the method is suitable for small and medium size gold extraction plants by a coal-oil agglomeration method.
The principle of the method for releasing gold in the coal-oil gold-loaded agglomerate (gold chamber) is that gold particles in the gold-loaded agglomerate can be catalytically oxidized by copper ammine complex ions in an alkaline medium, and form a complex with a complexing agent in the presence of an additive and a protective agent to enter a water phase, micropores and capillary tunnels in the agglomerate are filled with an oil phase, and the adsorption capacity on thiosulfate complex anions of gold with larger ionic radius is lost, so that agglomerated free gold and continuously produced gold in the gold chamber can be quantitatively released, and the reaction formula is as follows: the invention relates to a method for releasing gold in coal-oil gold-loaded agglomerates (gold chambers), which mainly comprises the following stepsThe gold-carrying agglomerate is uncovered and crushed to 60-80 meshes, naturally dried or dried at low temperature, and then added with a compound stripping solution for stripping, wherein the solid-to-liquid ratio is 1: 4-9, the compound stripping solution takes one of sodium thiosulfate and ammonium thiosulfate as a complexing agent, the concentration is 0.25-0.5mol/l, one of cuprammonium salt, copper sulfate and copper nitrate as a catalyst, and the concentration is 0.05-0.1 mol/l; one of sodium peroxide, hydrogen peroxide and oxygen (air) is used as an oxidant with the concentration of 0.01-0.03mol/l, and one of citrate, sodium ethylenedioxytetracetate and urea is used as an additive with the concentration of 0.03-0.06 mol/l; one of sodium sulfite and ammonium sulfate is used as a protective agent, and the concentration is 0.02-0.1 mol/l; one of ammonium hydroxide, sodium hydroxide and sodium carbonate is used as a pH regulator, and the pH value is 9.5-10.5; and (3) preparing a compound stripping solution. (b) Depositing gold, silver and copper by using one of crystalline sodium sulfide and sodium hydrosulfite as reducing agent in the stripped solution (pregnant solution), filtering and depositingRoasting the mixture, separating gold by using nitric acid for desulfurization, smelting gold powder into ingots, and recovering copper nitrate from filtrate; silver contained in the filtrate was previously recovered by sodium chloride precipitation. (c) The temperature of the prepared compound stripping liquid is controlled between 45 ℃ and 55 ℃, the stripping time under positive pressure (closed container) is 4 to 8 hours, the stirring intensity is 100 and 200rpm/min, and the reaction container is a glass lining reaction kettle. The gold-carrying agglomerate contains Al, Fe, Ca, etc. and is pre-treated with 1-2mol/l hydrochloric acid and crushed into 60-80 mesh chamber, and through leaching at normal temperature or warm temperature for 1-2 hr to eliminate the attached hydroxide film of Al, Fe, Ca, etc. from the chamber, filtering to clean the chamber with water to subacidity and neutralizing with dilute ammonia water to subalkaline. The agglomeration of sulfide inclusion gold remained in the gold room adopts a method of agglomerating gold and its intergrowth by coal-oil agglomeration, and can be repeatedly used after adding diesel oil, and when the sulfide inclusion and impurities are more (ash content is more than 20%), the residual inclusion gold needs to be firstly treated by combustion method so as to be recovered.
Example (b):
smashing coal-oil gold-loaded agglomerates (with gold loading of 1000-plus 5000g/l) prepared from quartz vein oxidation type gold ore to 60-80 meshes, adding the smashed coal-oil gold-loaded agglomerates into a glass lining reaction tank, adding any one of complexing agent, any one of catalyst, any one of oxidant, any one of additive, any one of protective agent and any one of pH regulator into a stripping solution compounded according to a solid-to-liquid ratio of 1: 4-8, carrying out closed stirring leaching for 4-8 hours at 45-55 ℃, cooling to room temperature, absorbing tail gas by water to recover ammonia, filtering pregnant solution, adding any one of reducing agent into the pregnant solution, uniformly stirring, standing overnight, filtering to deposit gold, silver and copper, roasting and desulfurizing, separating gold by nitric acid, smelting gold powder into ingots, recovering copper nitrate from filtrate after gold separation, and depositing silver in the filtrate by sodium chloride in advance to recover silver. The gold in the gold chamber is desorbed with a recovery rate of more than 95-99%, and the agglomerate after gold desorption can be made into agglomerate for recycling by supplementing diesel oil. If the gold-carrying agglomerate contains aluminum, iron and calcium, the agglomerate is crushed into 60-80 mesh gold room with 1-2mol/l hydrochloric acid, leached for 1-2 hr at normal temperature or warm condition to eliminate the attached hydroxide film of aluminum, iron, calcium, etc. in the gold room, filtered, water washed to slightly acidic, and diluted ammonia water neutralized to slightly basic.
Claims (3)
1. A method for releasing gold in coal-oil gold-loaded agglomerates (gold chambers), which is characterized by comprising the following steps:
(a) smashing gold-loaded agglomerates to 60-80 meshes, naturally drying or drying at low temperature, adding a compound stripping solution for stripping, wherein the solid-to-liquid ratio is 1: 4-8, the compound stripping solution takes one of sodium thiosulfate and ammonium thiosulfate as a complexing agent, the concentration is 0.25-0.5mol/l, one of copper ammonia chromate, copper sulfate and copper nitrate as a catalyst, and the concentration is 0.05-0.1 mol/l; one of sodium peroxide, hydrogen peroxide and oxygen (air) is used as an oxidant with the concentration of 0.01-0.03mol/l, and one of citrate, sodium ethylenedioxytetracetate and urea is used as an additive with the concentration of 0.03-0.06 mol/l; one of sodium sulfite and ammonium sulfate is used asa protective agent, and the concentration is 0.02-0.1 mol/l; one of ammonium hydroxide, sodium hydroxide and sodium carbonate is used as a pH regulator, and the pH value is 9.5-10.5; and (3) preparing a compound stripping solution.
(b) Gold in the desorbed solution (pregnant solution) is deposited with gold, silver and copper by using one of crystalline sodium sulfide and sodium hydrosulfite as a reducing agent, the deposit is filtered, the gold is separated by nitric acid for roasting and desulfuration, gold powder is dissolved into ingots, and copper nitrate is recovered from the filtrate; silver contained in the filtrate was previously recovered by sodium chloride precipitation.
(c) The temperature of the prepared compound stripping liquid is controlled between 45 ℃ and 55 ℃, the stripping time under positive pressure (closed container) is 4 to 8 hours, the stirring intensity is 100 and 200rpm/min, and the reaction container is a glass lining reaction kettle.
2. The method for releasing gold from coal-oil gold-loaded agglomerate (gold chamber) according to claim 1, wherein the gold-loaded agglomerate (gold chamber) contains aluminum, iron, calcium, etc., and is pre-treated with 1-2mol/l hydrochloric acid to break the gold chamber to 60-80 mesh, and is leached for 1-2 hours at normal temperature or warm temperature to remove the attached hydroxide film of aluminum, iron, calcium, etc., in the gold chamber, and then the gold chamber is washed with water by filtration to be slightly acidic, and then neutralized with dilute ammonia water to be slightly basic.
3. The method for releasing gold in coal-oil gold-loaded agglomerates (gold room) according to claims 1 and 2, characterized in that the agglomerates of sulfide inclusion gold remaining in the gold room are reused after adding diesel oil by adopting a method of agglomerating gold and its consortium by coal-oil agglomerates. When the sulfide inclusion and impurities in the agglomerate are more (ash content is more than 20%), the residual inclusion gold needs to be recovered by treatment after combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95121617A CN1044619C (en) | 1995-12-29 | 1995-12-29 | Method for extraction of gold from coal-oil gold-carried aggregate (gold chamber) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95121617A CN1044619C (en) | 1995-12-29 | 1995-12-29 | Method for extraction of gold from coal-oil gold-carried aggregate (gold chamber) |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1153219A true CN1153219A (en) | 1997-07-02 |
| CN1044619C CN1044619C (en) | 1999-08-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95121617A Expired - Fee Related CN1044619C (en) | 1995-12-29 | 1995-12-29 | Method for extraction of gold from coal-oil gold-carried aggregate (gold chamber) |
Country Status (1)
| Country | Link |
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| CN (1) | CN1044619C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181645A (en) * | 2011-04-13 | 2011-09-14 | 深圳市格林美高新技术股份有限公司 | Method for extracting silver from silver-extracted sediment |
| CN103088218A (en) * | 2013-01-16 | 2013-05-08 | 西北师范大学 | Method for extracting silver and lead from smelting slag generated by pyrogenic process treatment of copper anode mud |
| CN104263959A (en) * | 2014-09-19 | 2015-01-07 | 王荣增 | Novel environment-friendly gold extracting agent and preparation method thereof |
| CN105344485A (en) * | 2015-10-16 | 2016-02-24 | 中南大学 | Method for recycling gold and interlocked mass of gold from refractory gold ore based on sulfur-oil aggregative flotation |
| CN106282578A (en) * | 2016-08-31 | 2017-01-04 | 陕西瑞科新材料股份有限公司 | A kind of method reclaiming noble metal from discarded noble metal catalyst |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1015911B (en) * | 1989-05-29 | 1992-03-18 | 中国科学院化工冶金研究所 | Recovering gold and silver from difficultly processing gold ore |
| CN1028881C (en) * | 1991-12-29 | 1995-06-14 | 中国科学院新疆化学研究所 | Method for agglomeration of gold and its coenobiums by coal-oil ploymers |
-
1995
- 1995-12-29 CN CN95121617A patent/CN1044619C/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181645A (en) * | 2011-04-13 | 2011-09-14 | 深圳市格林美高新技术股份有限公司 | Method for extracting silver from silver-extracted sediment |
| CN103088218A (en) * | 2013-01-16 | 2013-05-08 | 西北师范大学 | Method for extracting silver and lead from smelting slag generated by pyrogenic process treatment of copper anode mud |
| CN103088218B (en) * | 2013-01-16 | 2015-08-12 | 西北师范大学 | Silver, plumbous method is extracted from the smelting slag that copper anode mud pyrogenic attack produces |
| CN104263959A (en) * | 2014-09-19 | 2015-01-07 | 王荣增 | Novel environment-friendly gold extracting agent and preparation method thereof |
| CN104263959B (en) * | 2014-09-19 | 2015-11-04 | 王荣增 | A kind of novel environment friendly proposes golden agent and preparation method thereof |
| CN105344485A (en) * | 2015-10-16 | 2016-02-24 | 中南大学 | Method for recycling gold and interlocked mass of gold from refractory gold ore based on sulfur-oil aggregative flotation |
| CN105344485B (en) * | 2015-10-16 | 2018-03-02 | 中南大学 | The method for reclaiming gold and its intergrowth from difficult-treating gold mine based on sulphur oil aggregative flotation |
| CN106282578A (en) * | 2016-08-31 | 2017-01-04 | 陕西瑞科新材料股份有限公司 | A kind of method reclaiming noble metal from discarded noble metal catalyst |
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| Publication number | Publication date |
|---|---|
| CN1044619C (en) | 1999-08-11 |
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