CN109825702A - With the method for active carbon enriching and recovering gold from polythionate gold immersing liquid - Google Patents
With the method for active carbon enriching and recovering gold from polythionate gold immersing liquid Download PDFInfo
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- CN109825702A CN109825702A CN201910312254.XA CN201910312254A CN109825702A CN 109825702 A CN109825702 A CN 109825702A CN 201910312254 A CN201910312254 A CN 201910312254A CN 109825702 A CN109825702 A CN 109825702A
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Abstract
The method of the invention discloses a kind of with active carbon from polythionate gold immersing liquid enriching and recovering gold, it is characterized by: first being pre-processed to active carbon, with pretreated activated carbon adsorption polythionate gold immersing liquid to realize enrichment golden in gold immersing liquid；Wherein, pretreated method is carried out to active carbon are as follows: take active carbon to be placed in and impregnated by ammonium hydroxide in the mixed liquor that one or both of potassium ferricyanide solution and potassium ferrocyanide solution form, take out, wash with water, dry to get pretreated active carbon is arrived.The present invention first pre-processes active carbon and is adsorbed again, on the one hand, realizes in the adsorption rate without greatly improving active carbon under conditions of adding cyanide；On the other hand, compared with needing to be added the enrichment method that cyanide adsorbs again, soaking golden medical fluid be can be recycled.
Description
Technical field
The present invention relates to leach enriching and recovering golden in your liquid, and in particular to a kind of to soak gold from polythionate with active carbon
The method of enriching and recovering gold in your liquid.
Background technique
The smelting of gold is generally divided into three sections: gold being dissolved into solution from ore, your liquid obtained；It is rich from your liquid
Collection recycling gold；Gold mud is purified, ingot casting obtains gold containing material.Over more than 100 years of cyanide gold-leaching appearance, have obtained great development,
It dominates in gold industry.Cyanide gold-leaching simple process, adaptability are good, but because its hypertoxicity is to ecological environment nocuousness.
Therefore, scientific worker makes great efforts to research and develop the less toxic gold-leaching technology without cyanogen, and up to now, reported non-cyanide gold-leaching reagents have more than ten
Kind, main technique can be divided into acid and alkaline leaching two major classes: 1) gold is mentioned in acid medium, such as Thiourea-uv Method, water chlorination process, bromine
Change method, iodide process, rhodanate method etc.；2) gold is mentioned in alkaline medium, as polysulfide method, thiosulfate technique, stone sulphur close
Agent method (LSSS)；In addition there are some other non-cyanide leaching gold reagents, such as amino acids, class cyanogen compound and humic-acid kind.Class
Cyanogen compound medicament has malononitrile, bromine cyanogen, rhodanide, amino acid calcium etc..
Currently, the low toxicity in China market as commodity selling, which soaks golden agent, nearly all contains cyanate or cyanate
Polymer can dissociate cyanogen root in use, by current cyanide examination criteria, can detecte out a large amount of cyanogen
Root.Real industrial application (test) is thiosulfuric acid and thiocarbamide without cyanogen reagent, but economy remains to be further improved.
The characteristic that charcoal can adsorb from gas phase and liquid phase, separate, purify Cucumber, is just recognized by the mankind in ancient times
Know, and is applied to life and production field.And charcoal can adsorb the characteristic of noble metal from solution, be M La Zuosiji
(Lazowski) it proposes within 1848.1880, W.N.Davis charcoal successfully adsorbed back from the solution of potassium cloride gold
Gold is received, and patented.1894, the filter that W.D.Johnston uses active carbon to fill, by potassium cyanide Leaching of Gold
Clarified solution flows through filter and extracts gold, silver, and then melting active carbon is recycled again.1934, T.G.Chapman was by active carbon
It is directly added into Cyanide Leaching ore pulp successfully adsorption recovery gold, he has stepped the first step for the development of carbon-in-pulp process.Such " charcoal
Slurry processes " were once applied to the mine Gai Teer of Nevada, USA the 1940s, though it can successfully be adsorbed from ore pulp
Recycling gold, but entire technique is proved to be uneconomic.Because therefrom recycling gold must be burnt and these gold loaded carbons of melting.1950
Year, J.B.Zadra has successfully desorbed gold using vulcanized sodium and sodium hydroxide mixed liquor from gold loaded carbon, but this method be unsuitable for from
Gold loaded carbon last time cash register.Successfully use the Cymag of heat and sodium hydroxide mixed liquor golden from carrying until nineteen fifty-two Zha Dela etc. is just studied
Gold, silver are desorbed simultaneously on charcoal, to establish the basis of modern carbon-in-pulp process.
The core of carbon-in-pulp process or carbon-in-leach process extraction of gold process is active carbon to suction-operated golden in cyanating solution.Activated carbon adsorption
The superiority and inferiority of golden performance will directly affect the technique to the rate of recovery of gold.After the application popularization of cyaniding, carbon slurry processes recycling gold
It is widely used.However it is well known to those skilled in the art, active carbon cannot selectively adsorb ammoniac thiosulfate
[Au (S in your liquid2O3)2]3-.In order to overcome active carbon to [Au (S2O3)2]3-The low deficiency low with affinity of load capacity,
By the way that a small amount of cyanide is added, (additional amount of cyanide is usually to make gold in its concentration system in system to the prior art
Concentration is 2-4 times) to generate a kind of stable gold-cyanide complex, then adsorb them quantitatively on the activated carbon again, thus
It realizes from the expensive liquid of thiosulfate and selectively recycles gold (Meng Qi, Cui Yiqi, Tong Xiong etc., from Leaching of Gold Using Thiosulfate solution
Recycle present Research " mining and metallurgy " in December, 2013 the 4th phase of volume 22 of gold).That is, existing with thiosulfate and company
More sulfate (include 4-6 thionic acid salt, such as the patent of invention institute of the Publication No. CN106893861A applied before the applicant
It is disclosed to soak golden agent) it is the expensive liquid of leaching for soaking golden agent, it needs to be added cyanide in gold immersing liquid, is otherwise difficult with traditional
Active carbon absorption technology enriching and recovering gold.Therefore, it is necessary to which it is traditional activated to propose that a kind of gold immersing liquid leached in no cyanogen uses
Method when charcoal Concentration of Gold without adding cyanide.
Summary of the invention
It is the expensive liquid of leaching for soaking golden agent the technical problem to be solved by the present invention is to be directed to existing with polythionate, is using
The deficiency for needing to be added cyanide when traditional active carbon absorption technology enriching and recovering gold in gold immersing liquid provides a kind of inhaling
Without adding the method with active carbon enriching and recovering gold from polythionate gold immersing liquid of cyanide when attached.
In order to solve the above technical problems, of the present invention use active carbon enriching and recovering from polythionate gold immersing liquid
Gold method, comprising: first active carbon is pre-processed, with pretreated activated carbon adsorption polythionate gold immersing liquid with
Realize enrichment golden in gold immersing liquid；Wherein,
Pretreated method is carried out to active carbon are as follows: active carbon is taken to be placed in by ammonium hydroxide and selected from potassium ferricyanide solution and ferrous iron
It is impregnated in the mixed liquor of one or both of potassium cyanide solution composition, takes out, wash with water, it is dry to get to after pre-processing
Active carbon.
In technical solution of the present invention, needing to carry out pretreated active carbon is that the existing ADSORPTION OF GOLD from gold immersing liquid is normal
Advise the active carbon used, such as cocoanut active charcoal, apricot shell active carbon, wooden column-shaped active carbon.
In technical solution of the present invention, (concentration of ammonium hydroxide refers to NH to concentration >=5% of the ammonium hydroxide in the application3Contain
Amount), preferably the concentration of ammonium hydroxide is 15-30%.
In technical solution of the present invention, the potassium ferricyanide solution is the aqueous solution of the potassium ferricyanide, potassium ferrocyanide
Solution is the aqueous solution of potassium ferrocyanide.Concentration >=10w/w% of the potassium ferricyanide solution for being used to impregnate active carbon, preferably
Using saturation potassium ferricyanide solution；Concentration >=10w/w% of the potassium ferrocyanide solution, it is preferred to use saturation potassium ferrocyanide
Solution.
In technical solution of the present invention, time >=30min of the immersion, preferably 1-10h.When impregnating, activity
Charcoal be all immersed in by ammonium hydroxide in the mixed liquor selected from one or both of potassium ferricyanide solution and potassium ferrocyanide solution.
In technical solution of the present invention, the dosage for the water of active carbon after cleaning and dipping is usually raw material active carbon weight
8-20 times of amount.
In technical solution of the present invention, by pretreated active carbon be used to adsorb gold immersing liquid when, dosage with
Existing regular activated carbon adsorption is identical, usually 20g/L.
Compared with prior art, the present invention first pre-processes active carbon adsorbs gold immersing liquid again, on the one hand, realizes
Without being effectively improved active carbon to polythionate gold immersing liquid [Au (S under conditions of adding cyanide2O3)2]3-Load energy
Power and affinity greatly improve the adsorption rate of active carbon；On the other hand, relative to the enrichment side for needing to be added cyanide and adsorbing again
Method is compared, and soaking golden medical fluid (medical fluid i.e. after isolating pretreated active carbon) can be recycled.
Specific embodiment
The present invention is described in further detail combined with specific embodiments below, content to better understand the invention, but
The present invention is not limited to following embodiments.
Embodiment 1
It takes 50g active carbon (cocoanut active charcoal) to be placed in the ammonium hydroxide and the 100mL potassium ferricyanide that are 15% by 50mL concentration to be saturated
8h is impregnated in the mixed liquor of solution composition, takes out, active carbon is placed in a beaker, 200mL water washing is added, and is washed repeatedly 3 times,
Filtering, is placed in baking oven (102 DEG C) drying, obtains pretreated active carbon.
Above-mentioned pretreated active carbon is taken to carry out the polythionic acid sodium gold immersing liquid that absorption gold concentration is 2.00ppm respectively
Experiment, while control experiment is carried out with untreated active carbon (i.e. raw material), and with untreated active carbon (i.e. raw material)
Adsorption experiment is carried out under conditions of cyanide is added, 3 processing are set altogether, activated carbon dosage is 20g/L in each processing,
Adsorption time is 4h, measures concentration golden in each gold immersing liquid, cyanogen root concentration later, and specific processing and result are as follows:
Processing 1: the active carbon used is pretreated active carbon made from embodiment 1.After adsorbing, polythionic acid sodium
Cyanogen root is not detected in gold immersing liquid, wherein gold concentration is 0.68ppm, is computed, adsorption rate 66%.
Processing 2: the active carbon used is raw material active carbon used in embodiment 1.After adsorbing, polythionic acid sodium leaching gold
Cyanogen root is not detected in your liquid, wherein gold concentration is 1.78ppm, is computed, adsorption rate 11%.
Processing 3: the active carbon used is raw material active carbon used in embodiment 1, and Cymag is added before being adsorbed,
Make the sodium cyanide concentration 4ppm in gold immersing liquid.After adsorbing, gold concentration is 0.05ppm in polythionic acid sodium gold immersing liquid,
It is computed, adsorption rate 97%；Cyanogen root concentration is 0.8ppm.
Embodiment 2
Take that 50g active carbon (cocoanut active charcoal) is placed in the ammonium hydroxide for being 5% by 50mL concentration and 80mL concentration is 10w/w% iron
8h is impregnated in the mixed liquor of potassium cyanide solution composition, takes out, active carbon is placed in a beaker, 200mL water washing is added, repetition is washed
It washs 3 times, filters, be placed in baking oven (75 DEG C) drying, obtain pretreated active carbon.
Above-mentioned pretreated active carbon is taken to carry out the polythionic acid sodium gold immersing liquid that absorption gold concentration is 2.00ppm respectively
Experiment, activated carbon dosage is 20g/L, and adsorption time is 4h, and it is dense to measure concentration golden in each gold immersing liquid, cyanogen root later
Degree, as the result is shown: golden concentration is reduced to 1.22ppm (adsorption rate 39%) in polythionic acid sodium gold immersing liquid, and cyanogen root is not detected.
Embodiment 3
Take that 50g active carbon (apricot shell active carbon) is placed in the ammonium hydroxide for being 10% by 50mL concentration and 100mL concentration is 15w/w%
2h is impregnated in the mixed liquor of potassium ferrocyanide, takes out, active carbon is placed in a beaker, and 200mL water washing, repeated washing 3 is added
Secondary, filtering is placed in baking oven (75 DEG C) drying, obtains pretreated active carbon.
Above-mentioned pretreated active carbon is taken to carry out the polythionic acid sodium gold immersing liquid that absorption gold concentration is 2.00ppm respectively
Experiment, activated carbon dosage is 20g/L, and adsorption time is 4h, and it is dense to measure concentration golden in each gold immersing liquid, cyanogen root later
Degree, as the result is shown: golden concentration is reduced to 1.14ppm (adsorption rate 43%) in polythionic acid sodium gold immersing liquid, and cyanogen root is not detected.
Embodiment 4
50g active carbon (apricot shell active carbon) is taken to be placed in ammonium hydroxide, potassium ferrocyanide saturated solution by 50mL concentration for 28%
Middle immersion 1h takes out, active carbon is placed in a beaker, and 100mL water washing is added, and washes repeatedly 3 times, and filtering is placed in baking oven
(75 DEG C) drying, obtain pretreated active carbon.
Above-mentioned pretreated active carbon is taken to carry out the polythionic acid sodium gold immersing liquid that absorption gold concentration is 2.00ppm respectively
Experiment, activated carbon dosage is 20g/L, and adsorption time is 4h, and it is dense to measure concentration golden in each gold immersing liquid, cyanogen root later
Degree, as the result is shown: golden concentration is reduced to 0.52ppm (adsorption rate 74%) in polythionic acid sodium gold immersing liquid, and cyanogen root is not detected.
Claims (9)
1. with the method for active carbon enriching and recovering gold from polythionate gold immersing liquid, it is characterised in that: first to active carbon into
Row pretreatment, with pretreated activated carbon adsorption polythionate gold immersing liquid to realize enrichment golden in gold immersing liquid；Its
In,
Pretreated method is carried out to active carbon are as follows: active carbon is taken to be placed in by ammonium hydroxide and selected from potassium ferricyanide solution and ferrocyanide
It is impregnated in the mixed liquor of one or both of potassium solution composition, takes out, wash with water, dried to get pretreated work is arrived
Property charcoal.
2. according to the method described in claim 1, it is characterized by: concentration >=5% of the ammonium hydroxide.
3. according to the method described in claim 1, it is characterized by: the concentration of the ammonium hydroxide is 15-28%.
4. according to the method described in claim 1, it is characterized by: concentration >=10w/w% of the potassium ferricyanide solution.
5. according to the method described in claim 1, it is characterized by: the potassium ferricyanide solution is that the saturation potassium ferricyanide is molten
Liquid.
6. according to the method described in claim 1, it is characterized by: concentration >=10w/w% of the potassium ferrocyanide solution.
7. according to the method described in claim 1, it is characterized by: the potassium ferrocyanide solution is saturation potassium ferrocyanide
Solution.
8. according to the method described in claim 1, it is characterized by: the time of the immersion >=30min.
9. according to the method described in claim 1, it is characterized by: the time of the immersion is 1-10h.
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| CN201910312254.XA CN109825702B (en) | 2019-04-18 | 2019-04-18 | Method for enriching and recovering gold from polythionate-dipped gold pregnant solution by using activated carbon |
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| CN201910312254.XA CN109825702B (en) | 2019-04-18 | 2019-04-18 | Method for enriching and recovering gold from polythionate-dipped gold pregnant solution by using activated carbon |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267030A (en) * | 2020-11-02 | 2021-01-26 | 昆明理工大学 | Method for directly recovering gold in thiosulfate system by using active carbon |
| CN112375911A (en) * | 2020-11-02 | 2021-02-19 | 昆明理工大学 | Direct recovery of (Au (S) with active carbon2O3)23-) Method (2) |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112267030A (en) * | 2020-11-02 | 2021-01-26 | 昆明理工大学 | Method for directly recovering gold in thiosulfate system by using active carbon |
| CN112375911A (en) * | 2020-11-02 | 2021-02-19 | 昆明理工大学 | Direct recovery of (Au (S) with active carbon2O3)23-) Method (2) |
| CN112375911B (en) * | 2020-11-02 | 2022-07-05 | 昆明理工大学 | Direct recovery of (Au (S) with active carbon2O3)23-) Method (2) |
| CN112267030B (en) * | 2020-11-02 | 2022-11-29 | 昆明理工大学 | Method for directly recovering gold in thiosulfate system by using active carbon |
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