CN105112657A - Gold extracting method with activated carbons - Google Patents
Gold extracting method with activated carbons Download PDFInfo
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- CN105112657A CN105112657A CN201510270263.9A CN201510270263A CN105112657A CN 105112657 A CN105112657 A CN 105112657A CN 201510270263 A CN201510270263 A CN 201510270263A CN 105112657 A CN105112657 A CN 105112657A
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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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- Y02P10/00—Technologies related to metal processing
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Abstract
The invention discloses a gold extracting method with activated carbons. The method comprises the following steps: (1) the activated carbons are put in an absorption column after being dispersed in water; (2) cyanided gold-contained precious liquid is fed into the absorption column from the column top for circular absorption; (3) the gold content in post-absorption liquid sent out from a liquid outlet in the column bottom is detected; and after the gold content in the post-absorption liquid is lower than 0.03 mg/L, the post-absorption liquid is replaced with fresh cyanided gold-contained precious liquid for continuous circular absorption; (4) when the gold content in the post-absorption liquid is equal to the gold content in solution entering the carbon column, the absorption is finished; and (5) after clear water is filled from the column top to wash the absorption column, desorption solution is filled from the column bottom to perform the circular desorption. The method performs the absorption and the desorption in one carbon column, so that the technological process is simplified, and the equipment cost is saved; and solution passes through carbon layers, so that intense friction between carbons and between the carbons and the column wall is not generated, and the carbon wear is little.
Description
Technical field
The invention belongs to Gold Production technical field, be specifically related to a kind of gac gold extracting method.
Background technology
At present, gold extracts main employing two kinds of flow process collocation forms, namely first leaches and adsorbs (CIP) and leaching limit, limit absorption (CIL) afterwards.In these two kinds of techniques, activated carbon adsorption of gold all wherein completes in stirring.Gac is ADSORPTION OF GOLD in whipping process, and owing to stirring, gac easily weares and teares, and even causes the loss of gold.Current, domestic conventional gold loaded carbon desorption technique is press desorb in normal temperature and pressure desorb and high temperature.Normal temperature and pressure stripping apparatus requires low, but desorption time is long, and sodium cyanide consumption is larger; Press desorb in high temperature, desorption rate is fast, and sodium cyanide consumption reduces 1/3rd, but equipment requirements is high, and the expensive liquid of desorb must carry out cooling step-down before discharging.CN101708467A discloses a kind of dynamic desorption process for gold-loaded carbon, and by realizing, solid-liquid two is phase circulating fluidized bed carries out dynamic desorption in this invention, shortens desorption time, but the wearing and tearing of gold loaded carbon can be caused to aggravate because solid-liquid seethes.
Summary of the invention
The object of the invention is to overcome prior art defect, a kind of gac gold extracting method is provided.
Concrete technical scheme of the present invention is as follows:
A kind of gac gold extracting method, comprises the steps:
(1) load in adsorption column after gac being disperseed in water, make the aspect ratio of the charcoal post wherein formed reach 2.7 ~ 5.5:1;
(2) expensive for gold-contg. cyanide liquid is carried out circulation absorption with the speed of 5 ~ 12BV/h in capital feeding adsorption column, control the liquid level 7 ~ 35cm more than activated carbon surface in adsorption column by interlock control apparatus simultaneously, the temperature of the expensive liquid of above-mentioned gold-contg. cyanide is 10 ~ 35 DEG C, wherein gold concentration 0.1 ~ 120mg/L, pH value 7.5 ~ 11.6;
(3) gold content after the absorption sent of liquid outlet at the bottom of coupled columns in liquid detects, when in liquid after absorption lower than 0.03mg/L after, be replaced as the expensive liquid of fresh gold-contg. cyanide and proceed circulation absorption;
(4) when the gold content in liquid after adsorbing is identical with the gold content of the solution entering charcoal post, absorption is terminated;
(5) after passing into clear water washing adsorption column from capital, at the bottom of post, pass into temperature with the speed of 3 ~ 7BV/h is that the stripping liquid of 80 ~ 95 DEG C carries out circulating desorption, monitoring overflow outlet stripping liquid gold concentration, in stripping liquid, gold concentration is up to standard, carries out collecting and supplementing stripping liquid, in stripping liquid, gold concentration is below standard, proceeds circulating desorption, the solute of above-mentioned stripping liquid is the NaCN of 0.5 ~ the 4 ‰ and NaOH of 0.5 ~ 4%, and solvent is water.
In a preferred embodiment of the invention, the aspect ratio of described charcoal post is 3 ~ 5:1.
In a preferred embodiment of the invention, described step (2) is: expensive for gold-contg. cyanide liquid is carried out circulation absorption with the speed of 5 ~ 10BV/h in capital feeding adsorption column, controls the liquid level 10 ~ 30cm more than activated carbon surface in adsorption column simultaneously by interlock control apparatus.
In a preferred embodiment of the invention, the temperature of the expensive liquid of described gold-contg. cyanide is 10 ~ 30 DEG C, wherein gold concentration 0.1 ~ 100mg/L, pH value 8 ~ 11.
In a preferred embodiment of the invention, described step (3) is: the gold content after the absorption that liquid outlet at the bottom of coupled columns is sent in liquid detects, when after absorption in liquid lower than 0.01mg/L after, be replaced as the expensive liquid of fresh gold-contg. cyanide and proceed circulation absorption.
In a preferred embodiment of the invention, described step (5) is: after passing into clear water washing adsorption column from capital, at the bottom of post, pass into temperature with the speed of 3 ~ 5BV/h is that the stripping liquid of 80 ~ 90 DEG C carries out circulating desorption, monitoring overflow outlet stripping liquid gold concentration, in stripping liquid, gold concentration is up to standard, carries out collecting and supplementing stripping liquid, and in stripping liquid, gold concentration is below standard, proceeds circulating desorption.
In a preferred embodiment of the invention, the solute of described stripping liquid is the NaCN of 0.5 ~ the 3 ‰ and NaOH of 0.5 ~ 3%, and solvent is water.
The invention has the beneficial effects as follows:
1, in method of the present invention, sorption and desorption all carries out in same charcoal post, simplifies technical process, saves equipment cost;
2, method of the present invention adopts fixed bed pattern, and by solution by layer of charcoal, between charcoal and charcoal, charcoal do not have fierce friction with post jamb, and charcoal weares and teares little;
3, the absorption absorption in method of the present invention adopts interlocking gear to control liquid level position surface 10 ~ 30cm on the activated carbon in post, guarantees that gac soaks in the solution always, avoids channel and formed, simultaneously also to adjust flow velocity as required;
4, method of the present invention adopts heating cycle desorption mode, can greatly reduce the consumption of strippant, accelerate mass-and heat-transfer simultaneously, also shorten desorption time.
Embodiment
Below by way of embodiment, technical scheme of the present invention is further detailed and is described.
Embodiment 1
(1) load in adsorption column after gac being disperseed in water, make the aspect ratio of the charcoal post wherein formed reach 3:1;
(2) expensive for gold-contg. cyanide liquid is carried out circulation absorption with the speed of 7.2BV/h in capital feeding adsorption column, control liquid level in adsorption column at the above 15cm of activated carbon surface by interlock control apparatus simultaneously, the temperature of the expensive liquid of above-mentioned gold-contg. cyanide is 14 DEG C, wherein gold concentration 0.8mg/L, pH value 8.2;
(3) gold content after the absorption sent of liquid outlet at the bottom of coupled columns in liquid detects, when in liquid after absorption lower than 0.01mg/L after, be replaced as the expensive liquid of fresh gold-contg. cyanide and proceed circulation absorption;
(4) when the gold content in liquid after adsorbing is identical with the gold content of the solution entering charcoal post, absorption is terminated;
(5) after passing into clear water washing adsorption column from capital, at the bottom of post, pass into temperature with the speed of 3BV/h is that the stripping liquid of 89 DEG C carries out circulating desorption, monitoring overflow outlet stripping liquid gold concentration, in stripping liquid, gold concentration is up to standard, carries out collecting and supplementing stripping liquid, in stripping liquid, gold concentration is below standard, proceeds circulating desorption, the solute of above-mentioned stripping liquid is the NaCN of the 0.9 ‰ and NaOH of 1.5%, and solvent is water.
Embodiment 2
(1) load in adsorption column after gac being disperseed in water, make the aspect ratio of the charcoal post wherein formed reach 5:1;
(2) expensive for gold-contg. cyanide liquid is carried out circulation absorption with the speed of 5.6BV/h in capital feeding adsorption column, control liquid level in adsorption column at the above 11cm of activated carbon surface by interlock control apparatus simultaneously, the temperature of the expensive liquid of above-mentioned gold-contg. cyanide is 28 DEG C, wherein gold concentration 33.6mg/L, pH value 10.6;
(3) gold content after the absorption sent of liquid outlet at the bottom of coupled columns in liquid detects, when in liquid after absorption lower than 0.01mg/L after, be replaced as the expensive liquid of fresh gold-contg. cyanide and proceed circulation absorption;
(4) when the gold content in liquid after adsorbing is identical with the gold content of the solution entering charcoal post, absorption is terminated;
(5) after passing into clear water washing adsorption column from capital, at the bottom of post, pass into temperature with the speed of 4BV/h is that the stripping liquid of 87 DEG C carries out circulating desorption, monitoring overflow outlet stripping liquid gold concentration, in stripping liquid, gold concentration is up to standard, carries out collecting and supplementing stripping liquid, in stripping liquid, gold concentration is below standard, proceeds circulating desorption, the solute of above-mentioned stripping liquid is the NaCN of the 1.7 ‰ and NaOH of 2.8%, and solvent is water.
Embodiment 3
(1) load in adsorption column after gac being disperseed in water, make the aspect ratio of the charcoal post wherein formed reach 4:1;
(2) expensive for gold-contg. cyanide liquid is carried out circulation absorption with the speed of 9.3BV/h in capital feeding adsorption column, control liquid level in adsorption column at the above 27cm of activated carbon surface by interlock control apparatus simultaneously, the temperature of the expensive liquid of above-mentioned gold-contg. cyanide is 20 DEG C, wherein gold concentration 93mg/L, pH value 9.7;
(3) gold content after the absorption sent of liquid outlet at the bottom of coupled columns in liquid detects, when in liquid after absorption lower than 0.01mg/L after, be replaced as the expensive liquid of fresh gold-contg. cyanide and proceed circulation absorption;
(4) when the gold content in liquid after adsorbing is identical with the gold content of the solution entering charcoal post, absorption is terminated;
(5) after passing into clear water washing adsorption column from capital, at the bottom of post, pass into temperature with the speed of 5BV/h is that the stripping liquid of 82 DEG C carries out circulating desorption, monitoring overflow outlet stripping liquid gold concentration, in stripping liquid, gold concentration is up to standard, carries out collecting and supplementing stripping liquid, in stripping liquid, gold concentration is below standard, proceeds circulating desorption, the solute of above-mentioned stripping liquid is the NaCN of the 2.9 ‰ and NaOH of 0.9%, and solvent is water.
Embodiment 4
(1) load in adsorption column after gac being disperseed in water, make the aspect ratio of the charcoal post wherein formed reach 5.3:1;
(2) expensive for gold-contg. cyanide liquid is carried out circulation absorption with the speed of 11.7BV/h in capital feeding adsorption column, control liquid level in adsorption column at the above 33cm of activated carbon surface by interlock control apparatus simultaneously, the temperature of the expensive liquid of above-mentioned gold-contg. cyanide is 32 DEG C, wherein gold concentration 109mg/L, pH value 11.5;
(3) gold content after the absorption sent of liquid outlet at the bottom of coupled columns in liquid detects, when in liquid after absorption lower than 0.03mg/L after, be replaced as the expensive liquid of fresh gold-contg. cyanide and proceed circulation absorption;
(4) when the gold content in liquid after adsorbing is identical with the gold content of the solution entering charcoal post, absorption is terminated;
(5) after passing into clear water washing adsorption column from capital, at the bottom of post, pass into temperature with the speed of 7BV/h is that the stripping liquid of 93 DEG C carries out circulating desorption, monitoring overflow outlet stripping liquid gold concentration, in stripping liquid, gold concentration is up to standard, carries out collecting and supplementing stripping liquid, in stripping liquid, gold concentration is below standard, proceeds circulating desorption, the solute of above-mentioned stripping liquid is the NaCN of the 3.6 ‰ and NaOH of 3.5%, and solvent is water.
The above, be only preferred embodiment of the present invention, therefore can not limit scope of the invention process according to this, the equivalence change namely done according to the scope of the claims of the present invention and description with modify, all should still belong in scope that the present invention contains.
Claims (7)
1. a gac gold extracting method, is characterized in that: comprise the steps:
(1) load in adsorption column after gac being disperseed in water, make the aspect ratio of the charcoal post wherein formed reach 2.7 ~ 5.5:1;
(2) expensive for gold-contg. cyanide liquid is carried out circulation absorption with the speed of 5 ~ 12BV/h in capital feeding adsorption column, control the liquid level 7 ~ 35cm more than activated carbon surface in adsorption column by interlock control apparatus simultaneously, the temperature of the expensive liquid of above-mentioned gold-contg. cyanide is 10 ~ 35 DEG C, wherein gold concentration 0.1 ~ 120mg/L, pH value 7.5 ~ 11.6;
(3) gold content after the absorption sent of liquid outlet at the bottom of coupled columns in liquid detects, when in liquid after absorption lower than 0.03mg/L after, be replaced as the expensive liquid of fresh gold-contg. cyanide and proceed circulation absorption;
(4) when the gold content in liquid after adsorbing is identical with the gold content of the solution entering charcoal post, absorption is terminated;
(5) after passing into clear water washing adsorption column from capital, at the bottom of post, pass into temperature with the speed of 3 ~ 7BV/h is that the stripping liquid of 80 ~ 95 DEG C carries out circulating desorption, monitoring overflow outlet stripping liquid gold concentration, in stripping liquid, gold concentration is up to standard, carries out collecting and supplementing stripping liquid, in stripping liquid, gold concentration is below standard, proceeds circulating desorption, the solute of above-mentioned stripping liquid is the NaCN of 0.5 ~ the 4 ‰ and NaOH of 0.5 ~ 4%, and solvent is water.
2. a kind of gac gold extracting method as claimed in claim 1, is characterized in that: the aspect ratio of described charcoal post is 3 ~ 5:1.
3. a kind of gac gold extracting method as claimed in claim 1, it is characterized in that: described step (2) is: expensive for gold-contg. cyanide liquid is carried out circulation absorption with the speed of 5 ~ 10BV/h in capital feeding adsorption column, controls the liquid level 10 ~ 30cm more than activated carbon surface in adsorption column by interlock control apparatus simultaneously.
4. a kind of gac gold extracting method as claimed in claim 1, is characterized in that: the temperature of the expensive liquid of described gold-contg. cyanide is 10 ~ 30 DEG C, wherein gold concentration 0.1 ~ 100mg/L, pH value 8 ~ 11.
5. a kind of gac gold extracting method as claimed in claim 1, it is characterized in that: described step (3) is: the gold content after the absorption that liquid outlet at the bottom of coupled columns is sent in liquid detects, when after absorption in liquid lower than 0.01mg/L after, be replaced as the expensive liquid of fresh gold-contg. cyanide and proceed circulation absorption.
6. a kind of gac gold extracting method as claimed in claim 1, it is characterized in that: described step (5) is: after passing into clear water washing adsorption column from capital, at the bottom of post, pass into temperature with the speed of 3 ~ 5BV/h is that the stripping liquid of 80 ~ 90 DEG C carries out circulating desorption, monitoring overflow outlet stripping liquid gold concentration, in stripping liquid, gold concentration is up to standard, carries out collecting and supplementing stripping liquid, and in stripping liquid, gold concentration is below standard, proceeds circulating desorption.
7. a kind of gac gold extracting method as claimed in claim 1, is characterized in that: the solute of described stripping liquid is the NaCN of 0.5 ~ the 3 ‰ and NaOH of 0.5 ~ 3%, and solvent is water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510270263.9A CN105112657A (en) | 2015-05-25 | 2015-05-25 | Gold extracting method with activated carbons |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510270263.9A CN105112657A (en) | 2015-05-25 | 2015-05-25 | Gold extracting method with activated carbons |
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| CN105112657A true CN105112657A (en) | 2015-12-02 |
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| CN201510270263.9A Pending CN105112657A (en) | 2015-05-25 | 2015-05-25 | Gold extracting method with activated carbons |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106367612A (en) * | 2016-08-31 | 2017-02-01 | 胡中 | Method for converting Au+ to Au3+ |
| CN111349784A (en) * | 2020-04-09 | 2020-06-30 | 烟台金鹏矿业机械有限公司 | Novel low formula is prevented segregation and is imitated high-efficient desorption column |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1213007A (en) * | 1998-08-24 | 1999-04-07 | 李文建 | Method and system for extracting noble metal adsorbed on activated carbon |
| CN2402372Y (en) * | 1999-12-02 | 2000-10-25 | 中国地质科学院成都矿产综合利用研究所 | Dualpurpose tower for adsorption and desorption |
| CN1298029A (en) * | 1999-12-02 | 2001-06-06 | 中国地质科学院成都矿产综合利用研究所 | Gold leaching solution adsorption desorption electrolysis integrated device and process |
-
2015
- 2015-05-25 CN CN201510270263.9A patent/CN105112657A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1213007A (en) * | 1998-08-24 | 1999-04-07 | 李文建 | Method and system for extracting noble metal adsorbed on activated carbon |
| CN2402372Y (en) * | 1999-12-02 | 2000-10-25 | 中国地质科学院成都矿产综合利用研究所 | Dualpurpose tower for adsorption and desorption |
| CN1298029A (en) * | 1999-12-02 | 2001-06-06 | 中国地质科学院成都矿产综合利用研究所 | Gold leaching solution adsorption desorption electrolysis integrated device and process |
Non-Patent Citations (1)
| Title |
|---|
| 宋双庆等编著: "《金银提取冶金》", 30 June 2012 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106367612A (en) * | 2016-08-31 | 2017-02-01 | 胡中 | Method for converting Au+ to Au3+ |
| CN106367612B (en) * | 2016-08-31 | 2018-06-15 | 胡中 | It is a kind of by Au+It is converted to Au3+Method |
| CN111349784A (en) * | 2020-04-09 | 2020-06-30 | 烟台金鹏矿业机械有限公司 | Novel low formula is prevented segregation and is imitated high-efficient desorption column |
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