CN109136552B - Improved environment-friendly gold extraction agent - Google Patents
Improved environment-friendly gold extraction agent Download PDFInfo
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- CN109136552B CN109136552B CN201811269522.6A CN201811269522A CN109136552B CN 109136552 B CN109136552 B CN 109136552B CN 201811269522 A CN201811269522 A CN 201811269522A CN 109136552 B CN109136552 B CN 109136552B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/12—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic alkaline solutions
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
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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
- Y02P10/20—Recycling
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- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
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Abstract
The invention discloses an improved environment-friendly gold extraction agent which comprises the raw materials of xanthate, urea, sodium sulfide, sodium hydroxide, sodium hexametaphosphate and sodium carbonate. The invention can improve the leaching rate of gold, reduce the consumption of medicament, has good leaching stability, and can better treat gold ore containing arsenic and carbon.
Description
Technical Field
The invention relates to the technical field of gold production, relates to a leachate purification technology, and particularly relates to an improved environment-friendly gold extraction agent.
Background
At present, more than 85% of gold in the world is extracted by a cyanidation method, and the gold is produced by the cyanidation method, so that the technology is mature. The method has the advantages of simple process, low production cost, strong adaptability to ores, high leaching rate and the like; the disadvantages are long leaching time, safety to human body and serious environmental pollution. Along with the current mining of gold ores in the world, the disposable ores are gradually reduced or exhausted, and the complex refractory ores and poor ores become main resources for gold production. The research on the comprehensive recovery technology of complex ores becomes an important subject in the field of gold production. In the aspect of extraction process, the separation of oxidized ore mainly adopts a cyanidation method, the requirement of environmental protection is stricter day by day, and particularly after a Chinese environmental protection method is implemented, enterprises are forced to control the environmental pollution caused by gold and silver production and accelerate the research of a clean production process, so that the gold production technology is promoted to develop towards the direction of no pollution or little pollution.
In order to solve the problem of the virulent pollution of cyanide, a large amount of experimental research work has been carried out by domestic and foreign related scholars for decades, and efforts are made to find low-toxicity and nontoxic environment-friendly gold leaching agents, wherein dozens of gold leaching agents are researched, for example: the thiourea method, the water-chlorine method, the coal-gold agglomeration method, the thiosulfate method, the lime-sulfur method, the hypochlorite method and the like are influenced by cost, stability, leaching rate and the like, and the industrial application process is slow. Therefore, in recent years, people have also searched for some environment-friendly gold extracting agents with low cost and little pollution to the environment.
The prior cyaniding gold extraction has the following defects: the medicament has high toxicity and pollutes the environment. 2. The leaching rate of the gold ore containing arsenic and high sulfur is low.
Disclosure of Invention
The invention aims to solve the problems in the prior art and discloses an improved environment-friendly gold extracting agent.
The technical scheme of the invention is as follows:
an improved environment-friendly gold extraction agent comprises the raw materials of yellow blood salt, urea, sodium sulfide, sodium hydroxide, sodium hexametaphosphate and sodium carbonate.
The improved environment-friendly gold extraction agent comprises the following raw materials in parts by weight: 20-40 parts of yellow blood salt, 30-50 parts of urea, 5-20 parts of sodium sulfide, 5-15 parts of sodium hydroxide, 1-10 parts of sodium hexametaphosphate and 20-40 parts of sodium carbonate.
Preferably, the improved environment-friendly gold extraction agent comprises the following raw materials in parts by weight: 30 parts of yellow blood salt, 40 parts of urea, 10 parts of sodium sulfide, 8 parts of sodium hydroxide, 5 parts of sodium hexametaphosphate and 30 parts of sodium carbonate.
The improved environment-friendly gold extracting agent can also comprise the following raw materials in parts by weight: 20 parts of yellow blood salt, 30 parts of urea, 10 parts of sodium sulfide, 5 parts of sodium hydroxide, 3 parts of sodium hexametaphosphate and 20 parts of sodium carbonate.
The improved environment-friendly gold extraction agent is prepared by adopting a decoction process, taking the raw materials in proportion and decocting at the temperature of about 650 plus 850 ℃.
The raw materials are taken according to a certain proportion, decocted at the temperature of 700 ℃ and then added with an oxidant, an arsenic removal agent, or iodide, lead salt or barium hydroxide for mixing. Preferably, the oxidant is: calcium peroxide; the arsenic removing agent is sodium hypochlorite or calcium hypochlorite.
The improved environment-friendly gold extraction agent comprises the following raw materials in parts by weight: 60 parts of decocted gold extracting agent, 20 parts of arsenic removing agent, 10 parts of oxidant, 5 parts of iodide, 3 parts of lead salt and 2 parts of barium hydroxide.
Preferably, the improved environment-friendly gold extraction agent comprises the following raw materials in percentage by weight: 60 parts of decocted gold extracting agent, 20 parts of arsenic removing agent, 10 parts of oxidant, 5 parts of iodide, 2 parts of lead salt and 3 parts of barium hydroxide.
The improved environment-friendly gold extracting agent can also comprise the following raw materials in percentage by weight: 70 parts of decocted gold extracting agent, 25 parts of arsenic removing agent, 15 parts of oxidant, 7 parts of iodide, 3 parts of lead salt and 5 parts of barium hydroxide.
The invention provides an environment-friendly gold extraction agent with wide application range, no toxicity, safety and reliability and a preparation method thereof. The environment-friendly gold extracting agent can form a complex with various noble metal ions and can quickly form a ligand with noble metal gold, silver and the like to be dissolved. The method is suitable for all gold-containing mineral aggregates such as oxidized ore, primary gold ore, gold and silver ore, limonite, high-sulfur ore, high-arsenic high-iron oxidized ore, cyanided tailings, gold concentrate and the like.
The invention provides an improved environment-friendly gold extraction agent with wide application range, no toxicity, safety and reliability and a preparation method thereof, namely, the gold extraction agent is prepared by mixing an oxidant, an arsenic removal agent and the like on the basis of 89-L gold extraction agent, so that the gold leaching rate can be improved, the agent consumption can be reduced, the leaching stability is good, and meanwhile, gold ores containing arsenic and carbon can be better treated.
The experiment and practice of the environment-friendly gold extracting agent of the invention prove that:
1. the leaching rate equivalent to that of sodium cyanide can be achieved in the production of gold ore wet leaching.
2. For gold ore containing carbon and arsenic, the leaching advantage is provided compared with sodium cyanide.
3. The consumption of the medicament is reduced by 10 to 20 percent
4. Good leaching stability, low toxicity and environmental protection.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
Example 1:
an improved environment-friendly gold extraction agent comprises the raw materials of yellow blood salt, urea, sodium sulfide, sodium hydroxide, sodium hexametaphosphate and sodium carbonate.
Example 2:
an improved environment-friendly gold extraction agent comprises the following raw materials in parts by weight: 30 parts of yellow blood salt, 40 parts of urea, 10 parts of sodium sulfide, 8 parts of sodium hydroxide, 5 parts of sodium hexametaphosphate and 30 parts of sodium carbonate; the preparation method is characterized by adopting a decoction process, taking the raw materials in proportion and decocting the raw materials at the temperature of about 700 ℃.
Example 3:
an improved environment-friendly gold extraction agent comprises the following raw materials in parts by weight: 20 parts of yellow blood salt, 30 parts of urea, 10 parts of sodium sulfide, 5 parts of sodium hydroxide, 3 parts of sodium hexametaphosphate and 20 parts of sodium carbonate; the preparation method is characterized by adopting a decoction process, taking the raw materials in proportion and decocting the raw materials at the temperature of about 700 ℃.
Example 4:
an improved environment-friendly gold extraction agent comprises the following raw materials in parts by weight: 30 parts of yellow blood salt, 40 parts of urea, 10 parts of sodium sulfide, 8 parts of sodium hydroxide, 5 parts of sodium hexametaphosphate and 30 parts of sodium carbonate; the preparation method is characterized by adopting a decoction process, taking the raw materials in proportion and decocting the raw materials at the temperature of about 700 ℃.
Example 5:
an improved environment-friendly gold extracting agent is provided,
the raw materials and the weight portions are as follows: 20-40 parts of yellow blood salt, 30-50 parts of urea, 5-20 parts of sodium sulfide, 5-15 parts of sodium hydroxide, 1-10 parts of sodium hexametaphosphate and 20-40 parts of sodium carbonate; the preparation method is characterized by adopting a decocting process, wherein the raw materials are taken according to a certain proportion and decocted at a temperature of about 700 ℃;
and an oxidant, an arsenic removing agent, or iodide or lead salt or barium hydroxide are added and mixed to obtain the compound, wherein the oxidant is: calcium peroxide; the arsenic removing agent is sodium hypochlorite or calcium hypochlorite; the improved environment-friendly gold extracting agent comprises the following raw materials in percentage by weight: 60 parts of decocted gold extracting agent, 20 parts of arsenic removing agent, 10 parts of oxidant, 5 parts of iodide, 2 parts of lead salt and 3 parts of barium hydroxide.
Example 6:
an improved environment-friendly gold extraction agent comprises the following raw materials in parts by weight: 20 parts of yellow blood salt, 30 parts of urea, 10 parts of sodium sulfide, 5 parts of sodium hydroxide, 3 parts of sodium hexametaphosphate and 20 parts of sodium carbonate; the raw materials are taken according to a certain proportion, decocted at the temperature of about 700 ℃ and then added with an oxidant, an arsenic removal agent, or iodide, or lead salt, or barium hydroxide for mixing; the oxidant is: calcium peroxide; the arsenic removing agent is sodium hypochlorite or calcium hypochlorite; the improved environment-friendly gold extracting agent comprises the following raw materials in percentage by weight: 70 parts of decocted gold extracting agent, 25 parts of arsenic removing agent, 15 parts of oxidant, 7 parts of iodide, 3 parts of lead salt and 5 parts of barium hydroxide.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. An improved environment-friendly gold extraction agent is characterized in that: the raw materials and the weight portions are as follows: 20-40 parts of yellow blood salt, 30-50 parts of urea, 5-20 parts of sodium sulfide, 5-15 parts of sodium hydroxide, 1-10 parts of sodium hexametaphosphate and 20-40 parts of sodium carbonate; the preparation method comprises the steps of (1) decocting raw materials in proportion at 650-800 ℃ by adopting a decoction process; adding an oxidant, an arsenic removing agent, iodide, lead salt and barium hydroxide into the decocted substance, and mixing to obtain the mixture;
the gold extraction agent comprises the following components in parts by weight: 60 parts of decocted substances, 20 parts of arsenic removal agent, 10 parts of oxidant, 5 parts of iodide, 3 parts of lead salt and 2 parts of barium hydroxide; or 60 parts of decocted substances, 20 parts of arsenic removal agent, 10 parts of oxidant, 5 parts of iodide, 2 parts of lead salt and 3 parts of barium hydroxide; or 70 parts of decocted substance, 25 parts of arsenic removing agent, 15 parts of oxidant, 7 parts of iodide, 3 parts of lead salt and 5 parts of barium hydroxide;
the oxidant is calcium peroxide; the arsenic removing agent is sodium hypochlorite or calcium hypochlorite.
2. The improved environment-friendly gold extracting agent as set forth in claim 1, characterized in that: the raw materials and the weight portions are as follows: 30 parts of yellow blood salt, 40 parts of urea, 10 parts of sodium sulfide, 8 parts of sodium hydroxide, 5 parts of sodium hexametaphosphate and 30 parts of sodium carbonate.
3. The improved environment-friendly gold extracting agent as set forth in claim 1, characterized in that: the raw materials and the weight portions are as follows: 20 parts of yellow blood salt, 30 parts of urea, 10 parts of sodium sulfide, 5 parts of sodium hydroxide, 3 parts of sodium hexametaphosphate and 20 parts of sodium carbonate.
4. The improved environment-friendly gold extracting agent as set forth in claim 1, characterized in that: the raw materials are taken according to a certain proportion, decocted at the temperature of 700 ℃, and then added with an oxidant, an arsenic removing agent, iodide, lead salt and barium hydroxide to be mixed to obtain the product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811269522.6A CN109136552B (en) | 2018-10-29 | 2018-10-29 | Improved environment-friendly gold extraction agent |
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| CN201811269522.6A CN109136552B (en) | 2018-10-29 | 2018-10-29 | Improved environment-friendly gold extraction agent |
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| CN109136552A CN109136552A (en) | 2019-01-04 |
| CN109136552B true CN109136552B (en) | 2020-07-31 |
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| CN113430393A (en) * | 2021-06-25 | 2021-09-24 | 甘肃省地质矿产勘查开发局第三地质矿产勘查院 | Environment-friendly gold leaching agent and preparation method and application thereof |
Citations (5)
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|---|---|---|---|---|
| CN102166545A (en) * | 2010-11-22 | 2011-08-31 | 阙明 | Mineral dressing additive for gold mine and preparation method thereof |
| CN103937986A (en) * | 2014-01-23 | 2014-07-23 | 柯柏友 | Preparation method of environment-friendly type precious metal beneficiation agent |
| CN104250693A (en) * | 2013-06-26 | 2014-12-31 | 左良才 | Novel environmentally-friendly precious metal mineral separation agent |
| CN105950884A (en) * | 2016-04-27 | 2016-09-21 | 天津华勘矿业选冶技术开发有限公司 | Environmental-protection gold leaching agent and preparation method thereof |
| EP3106530A1 (en) * | 2015-06-16 | 2016-12-21 | Forschungsinstitut für Anorganische Werkstoffe - Glas/Keramik- GmbH | Method and assembly for obtaining a metal-containing secondary raw material |
-
2018
- 2018-10-29 CN CN201811269522.6A patent/CN109136552B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102166545A (en) * | 2010-11-22 | 2011-08-31 | 阙明 | Mineral dressing additive for gold mine and preparation method thereof |
| CN104250693A (en) * | 2013-06-26 | 2014-12-31 | 左良才 | Novel environmentally-friendly precious metal mineral separation agent |
| CN103937986A (en) * | 2014-01-23 | 2014-07-23 | 柯柏友 | Preparation method of environment-friendly type precious metal beneficiation agent |
| EP3106530A1 (en) * | 2015-06-16 | 2016-12-21 | Forschungsinstitut für Anorganische Werkstoffe - Glas/Keramik- GmbH | Method and assembly for obtaining a metal-containing secondary raw material |
| CN105950884A (en) * | 2016-04-27 | 2016-09-21 | 天津华勘矿业选冶技术开发有限公司 | Environmental-protection gold leaching agent and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| "黄金冶炼技术综述";简椿林;《湿法冶金》;20081231;第27卷(第1期);第1-6页 * |
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