CN107488789B - A method of the co-desorption gold thiosulfate anion complex ion from strong-base anion-exchange resin - Google Patents
A method of the co-desorption gold thiosulfate anion complex ion from strong-base anion-exchange resin Download PDFInfo
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- CN107488789B CN107488789B CN201710686637.4A CN201710686637A CN107488789B CN 107488789 B CN107488789 B CN 107488789B CN 201710686637 A CN201710686637 A CN 201710686637A CN 107488789 B CN107488789 B CN 107488789B
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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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- 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
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/22—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition
- C22B3/24—Treatment or purification of solutions, e.g. obtained by leaching by physical processes, e.g. by filtration, by magnetic means, or by thermal decomposition by adsorption on solid substances, e.g. by extraction with solid resins
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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
Abstract
The method of the invention discloses a kind of from strong-base anion-exchange resin co-desorption gold thiosulfate anion complex ion, with Na2SO3There is the strong-base anion-exchange resin of golden thiosulfate anion complex ion to carry out dynamic desorption load as strippant with the mixed solution of NaOH.This process employs SO3 2‑And OH‑The synergistic effect of two components is to [Au (the S being adsorbed on strong-base anion-exchange resin2O3)2]3‑Complex ion is desorbed, and golden desorption efficiency is up to 97% or more.Desorption method of the invention is compared with the method that traditional rhodanate, polythionate or nitrate solution etc. using one-component is desorbed, with reagent, nontoxic and performance is stable, desorb at low cost, resin desorption and regeneration synchronously completes and be conducive to the significant advantages such as further recycling golden in stripping liquid, has good prospects for commercial application.
Description
Technical field
The present invention relates to technical field of wet metallurgy, and in particular to one kind cooperates with solution from strong-base anion-exchange resin
Inhale the method for golden thiosulfate anion complex ion.
Background technique
As a kind of important non-cyanogen gold extracting method, thiosulfate technique has nontoxic, the golden speed of leaching fastly, to equipment without corruption
Erosion and the advantages that the Refractory Au-ores high treating effect such as carbon containing, copper, thus it is increasingly subject to the concern of researcher.However, should
There are also several big problems demands to solve before realizing wide range of industrial applications for method, one of them is exactly to recycle gold from its gold leachate to be stranded
It is difficult.
Leaching of Gold Using Thiosulfate liquid complicated component, in addition to [Au (S2O3)2]3-Except complex ion also containing it is a large amount of inevitably from
Son, including copper ion, thiosulfate ion, polythionate and other metal ions etc..Therefore, heavy using conventional displacement
Shallow lake method or electrodeposition method hardly result in the golden product of high-purity, and the recycling of gold leachate is difficult.Due to the hair of carbon-in-pulp process
Exhibition, active carbon have been widely used in recycling golden in cyanide-leached solution.However, when active carbon is used for Leaching of Gold Using Thiosulfate liquid
Effect is poor when the recycling of middle gold, this may be because of [Au (S2O3)2]3-The negative electrical charge of complex ion is high and space steric effect is led greatly
Cause active carbon not strong to its affinity.Solvent extraction requires height to water phase clarity, therefore ore pulp is needed by secondary filter,
Lead to complex process.In addition, extractant can be partially soluble in water phase and accumulate, this will cause the loss of extractant and is unfavorable for leaching gold
The recycling of liquid.In comparison, resin adsorption method is with adsorption capacity is big, adsorption rate is fast, resin solution low to water quality requirement
The advantages that suction and regeneration can synchronously complete, thus be considered as that the most promising side of gold is recycled from Leaching of Gold Using Thiosulfate liquid
Method.
Since adsorption capacity is low under strongly alkaline conditions for weakly base resin, Leaching of Gold Using Thiosulfate liquid (pH 9~11)
The recycling of middle gold generally uses basic resin, and since the gold in gold leachate is mainly with [Au (S2O3)2]3-Complex ion form is deposited
, therefore resin used is anion exchange resin.However, since strong-base anion-exchange resin is to [Au (S2O3)2]3-Match
Ion has strong affinity, therefore the desorption of subsequent gold is difficult, it usually needs the desorption agent solution of high concentration.It is traditionally used for strong
The reagent of golden thiosulfate anion complex ion desorption mainly has rhodanate, polythionate and nitre on alkalescence anion-exchange resin
Hydrochlorate.However, the economy and the feature of environmental protection of rhodanate are poor, and when recycling gold from stripping liquid using electrodeposition method, electrode
It can be corroded.In addition, difficult with traditional hydrochloric acid or regeneration of sulfuric acid resin, reason is that rhodanate holds under strongly acidic conditions
It easily decomposes and generates elemental sulfur, sulphur precipitating blocks resin duct and then makes resin poison.Polythionate (predominantly S3O6 2-With
S4O6 2-) itself is easily decomposed, thus reagent dosage is big, it desorbs at high cost.Similarly, resin is carried out again using hydrochloric acid or sulfuric acid
The raw sulphur precipitating that can also generate makes resin poison.It is desorbed using nitrate, it usually needs the more strippants of the higher volume of concentration are molten
Liquid can reach identical desorption effect, and reason may be that resin is better than nitric acid to the affinity of thiocyanate radical and polythionate
Root.In addition, stripping liquid obtained by the method is unstable, the black precipitate that gold is had when therefrom recycling gold using electrodeposition method is generated, because
This is unfavorable to the recycling of gold.
In conclusion traditional method for desorbing golden thiosulfate anion complex ion from strong-base anion-exchange resin exists
There are larger problems in terms of reagent stability, economy or the feature of environmental protection.Moreover, gold desorption and resin regeneration need substep into
Row, causes desorption technique long flow path, and in addition resin is easy poisoning in the process, is allowed to that difficulty is recycled, leads to golden recycling
Increased costs.In addition, the strippant of high concentration may produce further recycling (generally using electrodeposition method) golden in stripping liquid
Raw adverse effect.
Summary of the invention
It is an object of the present invention to overcome the shortcomings of to mention in background above technology and defect, provide it is a kind of efficiently, warp
Ji, environmental protection, simple process and do not influence co-desorption gold on the slave strong-base anion-exchange resin of recycling golden in stripping liquid
The method of thiosulfate anion complex ion.
In order to solve the above technical problems, technical solution proposed by the present invention are as follows:
A method of the co-desorption gold thiosulfate anion complex ion from strong-base anion-exchange resin, with Na2SO3
With the mixed solution of NaOH as strippant to load have the strong-base anion-exchange resin of golden thiosulfate anion complex ion into
Mobile state desorption.
During strippant and resin contact, mainly pass through SO3 2-Ion, OH-Ion and [Au (S2O3)2]3-With from
The interaction of son and the desorption for realizing gold, the mechanism of desorption are as follows: when containing Na2SO3Tree is flowed through with the mixed solution of NaOH
Rouge and with [Au (S thereon2O3)2]3-After complex ion contact, SO3 2-Ion can replace [Au (S2O3)2]3-One in complex ion
S2O3 2-Ligand, and then form new mixed ligand [Au (S2O3)(SO3)]3-Complex ion；Resin is to [Au (S2O3)(SO3)]3-With from
The affinity of son is well below to [Au (S2O3)2]3-The affinity of complex ion, the OH in strippant-Ion so with [Au (S2O3)
(SO3)]3-Ion-exchange reactions occurs for complex ion, it is desorbed from resin.Therefore, the Na of low concentration2SO3And NaOH
Mixed solution can be realized gold desorption.In the desorption process, golden desorption is SO3 2-Ion and OH-Two component associations of ion
Same-action as a result, the reaction square formula (1) of its co-desorption.
Above-mentioned method, it is preferred that the Na2SO3In the mixed solution of NaOH, Na2SO3Concentration be 0.3mol/L
The concentration of~0.6mol/L, NaOH are 0.2mol/L~0.6mol/L.Since the desorption of gold is in SO3 2-Ion and OH-Ion
The lower progress of synergistic effect, therefore need to only use the Na of low concentration2SO3And NaOH, and it is preferred that using the Na of above-mentioned concentration2SO3
The efficient desorption of gold can have not only been realized with the mixed solution of NaOH, but also can save reagent, reduce production cost.
Above-mentioned method, it is preferred that during the dynamic desorption, the flow velocity of strippant be 2~4 resin bed volumes/
Hour.The size of strippant flow velocity determines its residence time in resin bed, namely determine its on resin wait solve
The time of the golden thiosulfate anion complex ion interaction of suction.Interaction between strippant and golden thiosulfate anion complex ion
The regular hour is needed, if strippant flow velocity is excessively high, time of contact is short, and not exclusively, golden desorption effect is undesirable for interaction.
Conversely, although the two interaction is completely, golden desorption effect is good, and flow velocity is too low to be made to desorb if strippant flow velocity is too low
Overlong time causes to desorb economy decline.The present invention comprehensively considers the desorption effect and desorption economy of gold, preferably will desorption
The flow control of agent is in 2~4 resin bed volume/hours.
Above-mentioned method, it is preferred that during the dynamic desorption, the dosage of strippant is 15~35 resin bed bodies
Product.Strippant dosage is determined by concentration golden in strippant flow velocity and resin bed bottom efflux, is specifically used with lower section
Method determines: allowing strippant to pass through resin bed with certain flow rate, takes a certain amount of stripping liquid from exchange column bottom at regular intervals
The concentration for detecting gold, when be nearly no detectable gold there are when, it is believed that desorption is complete, thereby determines that required strippant is used
Amount.When strippant flow velocity and strippant dosage determine, corresponding desorption time is also determined that.If strippant dosage is very few,
The desorption effect of gold is bad；If strippant dosage is excessive, it will cause the wastes of reagent, increase production cost.Therefore, of the invention
Comprehensively consider desorption effect and cost factor to control strippant dosage in 15~35 resin bed volumes.
Above-mentioned method, it is preferred that the load gold amount of the strong-base anion-exchange resin is 5kg/t~20k g/t.This
The desorption method of invention is suitable for the wider gold loaded resin for carrying gold amount range, it is only necessary to according to the load gold amount of gold loaded resin to desorption
Technological parameter, which is made, correspondingly to be adjusted.The load gold amount of gold loaded resin obtained by conventional RIP method (resin in pulp process) generally exists
5kg/t~20kg/t suitably adjusts Na within the scope of the invention2SO3With NaOH concentration, strippant flow velocity and strippant dosage,
It can be applied to the desorption of the gold loaded resin of above-mentioned load gold amount range.
Compared with the prior art, the advantages of the present invention are as follows:
(1) strippant economy, environmental protection and property are stablized.Sodium sulfite and sodium hydroxide used in the present invention are common nothing
Malicious, inexpensive and stable property reagent.
(2) it is high to desorb desorption efficiency at low cost, golden.Traditional desorption method (agent solution is desorbed using single component) desorption
Gold usually requires higher concentration and large volume of desorption agent solution, and the present invention is due to being utilized sodium sulfite and sodium hydroxide
The synergistic effect of two components is so that strippant concentration and dosage significantly reduce, and the desorption of gold is more thorough, and golden desorption efficiency reaches
97% or more.
(3) be conducive to further recycling golden in stripping liquid.Using electrodeposition method obtained by the co-desorption method of the invention
When desorbing recycling gold in your liquid, electrode will not be desorbed corrosion, and the golden mixed ligand complex ion of generation will not be oxidized, from
Without will affect further recycling golden in stripping liquid.
(4) golden desorption and resin regeneration synchronously complete, simple process.While gold is desorbed from resin, on resin
Counter ion be converted into hydroxide ion, resin is weak to its affinity, thus resin can be returned directly to thiosulfate leaching
The recycling of gold is carried out in liquid, and a small amount of accumulation of the hydroxide ion in leachate will not have an adverse effect to leaching process.
Specific embodiment
To facilitate the understanding of the present invention, present invention work more comprehensively, is meticulously described below in conjunction with preferred embodiment,
But the protection scope of the present invention is not limited to the following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter and the normally understood meaning of those skilled in the art
It is identical.Technical term used herein is intended merely to the purpose of description specific embodiment, is not intended to the limitation present invention
Protection scope.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city
Field is commercially available or can be prepared by existing method.
Embodiment 1:
First using simulation thiosulfate leaching liquid, gold loaded resin is prepared in the method for stirring and adsorbing.Wherein, sulphur is simulated
Gold concentration is 20mg/L, concentration of sodium thiosulfate 0.3mol/L, copper concentration 0.03mol/L, ammonia in thiosulfate leachate
Water concentration is 1mol/L, and simulation leachate volume is 2L, and absorption resin uses Tulsion A-21S basic resin, and resin is used
Amount is 10mL, mixing speed 150r/min, adsorption time 1h.After absorption, obtain carrying the resin that gold amount is 5kg/t.
Then, obtained gold loaded resin is subjected to dress column.Wherein, exchange column internal diameter is 4mm, and resin bed height is 80cm, resin bed body
Product is 10mL.
Using Na2SO3Dynamic desorption is carried out to above-mentioned gold loaded resin as strippant with the mixed solution of NaOH.Strippant
In: Na2SO3Concentration is 0.3mol/L, NaOH concentration 0.2mol/L.Strippant flow velocity is 4 resin bed volume/hours, dosage
For 20 resin bed volumes.With this condition, concentration golden in gained stripping liquid is 170.1mg/L, and golden desorption efficiency is
97.2%.
Embodiment 2:
Gold loaded resin used is in the same manner as in Example 1, using Na2SO3With the mixed solution of NaOH as strippant to above-mentioned
Gold loaded resin carries out dynamic desorption.In strippant: Na2SO3Concentration is 0.4mol/L, NaOH concentration 0.3mol/L.Desorbent stream
Speed is 3 resin bed volume/hours, and dosage is 18 resin bed volumes.With this condition, concentration golden in gained stripping liquid is
190.2mg/L, golden desorption efficiency are 97.8%.
Embodiment 3:
Gold loaded resin used is in the same manner as in Example 1, using Na2SO3With the mixed solution of NaOH as strippant to above-mentioned
Gold loaded resin carries out dynamic desorption.In strippant: Na2SO3Concentration is 0.5mol/L, NaOH concentration 0.4mol/L.Desorbent stream
Speed is 3 resin bed volume/hours, and dosage is 16 resin bed volumes.With this condition, concentration golden in gained stripping liquid is
214.8mg/L, golden desorption efficiency are 98.2%.
Embodiment 4:
Gold loaded resin used is in the same manner as in Example 1, using Na2SO3With the mixed solution of NaOH as strippant to above-mentioned
Gold loaded resin carries out dynamic desorption.In strippant: Na2SO3Concentration is 0.6mol/L, NaOH concentration 0.6mol/L.Desorbent stream
Speed is 2 resin bed volume/hours, and dosage is 15 resin bed volumes.With this condition, concentration golden in gained stripping liquid is
229.8mg/L, golden desorption efficiency are 98.5%.
Comparative example 1:
Gold loaded resin used is in the same manner as in Example 1, using NH4SCN solution as strippant to above-mentioned gold loaded resin into
Mobile state desorption.NH in strippant4SCN concentration is 2.5mol/L, and strippant flow velocity is 3 resin bed volume/hours, and dosage is
17 resin bed volumes.With this condition, concentration golden in gained stripping liquid is 192.7mg/L, and golden desorption efficiency is 93.6%.
Comparative example 2:
Gold loaded resin used is in the same manner as in Example 1, using Na2S4O6Solution as strippant to above-mentioned gold loaded resin into
Mobile state desorption.Na in strippant2S4O6Concentration is 2.5mol/L, and strippant flow velocity is 3 resin bed volume/hours, and dosage is
16 resin bed volumes.With this condition, concentration golden in gained stripping liquid is 206.1mg/L, and golden desorption efficiency is 94.2%.
Comparative example 3:
Gold loaded resin used is in the same manner as in Example 1, using NH4NO3Solution carries out above-mentioned gold loaded resin as strippant
Dynamic desorption.NH in strippant4NO3Concentration is 2.5mol/L, and strippant flow velocity is 3 resin bed volume/hours, dosage 18
A resin bed volume.With this condition, concentration golden in gained stripping liquid is 176.0mg/L, and golden desorption efficiency is 90.5%.
Embodiment 5:
First using simulation thiosulfate leaching liquid, gold loaded resin is prepared in the method for stirring and adsorbing.Wherein, sulphur is simulated
Gold concentration is 20mg/L, concentration of sodium thiosulfate 0.3mol/L, copper concentration 0.03mol/L, ammonia in thiosulfate leachate
Water concentration is 1mol/L, and simulation leachate volume is 4L, and absorption resin uses DEX-Au basic resin, and amount of resin is
10mL, mixing speed 200r/min, adsorption time 2h.After absorption, obtain carrying the resin that gold amount is 10kg/t.So
Afterwards, obtained gold loaded resin is subjected to dress column.Wherein, exchange column internal diameter is 4mm, and resin bed height is 80cm, resin bed volume
For 10mL.
Using Na2SO3Dynamic desorption is carried out to above-mentioned gold loaded resin as strippant with the mixed solution of NaOH.Strippant
In: Na2SO3Concentration is 0.3mol/L, NaOH concentration 0.2mol/L.Strippant flow velocity is 4 resin bed volume/hours, dosage
For 25 resin bed volumes.With this condition, concentration golden in gained stripping liquid is 271.9mg/L, and golden desorption efficiency is
97.1%.
Embodiment 6:
Gold loaded resin used is in the same manner as in Example 5, using Na2SO3With the mixed solution of NaOH as strippant to above-mentioned
Gold loaded resin carries out dynamic desorption.In strippant: Na2SO3Concentration is 0.4mol/L, NaOH concentration 0.3mol/L.Desorbent stream
Speed is 4 resin bed volume/hours, and dosage is 23 resin bed volumes.With this condition, concentration golden in gained stripping liquid is
297.9mg/L, golden desorption efficiency are 97.9%.
Embodiment 7:
Gold loaded resin used is in the same manner as in Example 5, using Na2SO3With the mixed solution of NaOH as strippant to above-mentioned
Gold loaded resin carries out dynamic desorption.In strippant: Na2SO3Concentration is 0.5mol/L, NaOH concentration 0.4mol/L.Desorbent stream
Speed is 3 resin bed volume/hours, and dosage is 22 resin bed volumes.With this condition, concentration golden in gained stripping liquid is
313.1mg/L, golden desorption efficiency are 98.4%.
Embodiment 8:
Gold loaded resin used is in the same manner as in Example 5, using Na2SO3With the mixed solution of NaOH as strippant to above-mentioned
Gold loaded resin carries out dynamic desorption.In strippant: Na2SO3Concentration is 0.6mol/L, NaOH concentration 0.6mol/L.Desorbent stream
Speed is 2 resin bed volume/hours, and dosage is 20 resin bed volumes.With this condition, concentration golden in gained stripping liquid is
346.9mg/L, golden desorption efficiency are 99.1%.
Comparative example 4:
Gold loaded resin used is in the same manner as in Example 5, using NH4SCN solution as strippant to above-mentioned gold loaded resin into
Mobile state desorption.NH in strippant4SCN concentration is 2.5mol/L, and strippant flow velocity is 3 resin bed volume/hours, and dosage is
23 resin bed volumes.With this condition, concentration golden in gained stripping liquid is 282.1mg/L, and golden desorption efficiency is 92.7%.
Comparative example 5:
Gold loaded resin used is in the same manner as in Example 5, using Na2S4O6Solution as strippant to above-mentioned gold loaded resin into
Mobile state desorption.Na in strippant2S4O6Concentration is 2.5mol/L, and strippant flow velocity is 3 resin bed volume/hours, and dosage is
21 resin bed volumes.With this condition, concentration golden in gained stripping liquid is 312.7mg/L, and golden desorption efficiency is 93.8%.
Comparative example 6:
Gold loaded resin used is in the same manner as in Example 5, using NH4NO3Solution carries out above-mentioned gold loaded resin as strippant
Dynamic desorption.NH in strippant4NO3Concentration is 2.5mol/L, and strippant flow velocity is 3 resin bed volume/hours, dosage 24
A resin bed volume.With this condition, concentration golden in gained stripping liquid is 261.0mg/L, and golden desorption efficiency is 89.5%.
Embodiment 9:
First using simulation thiosulfate leaching liquid, gold loaded resin is prepared in the method for stirring and adsorbing.Wherein, sulphur is simulated
Gold concentration is 20mg/L, concentration of sodium thiosulfate 0.3mol/L, copper concentration 0.03mol/L, ammonia in thiosulfate leachate
Water concentration is 1mol/L, and simulation leachate volume is 8L, and absorption resin uses IRA-400 basic resin, and amount of resin is
10mL, mixing speed 250r/min, adsorption time 3h.After absorption, obtain carrying the resin that gold amount is 20kg/t.So
Afterwards, obtained gold loaded resin is subjected to dress column.Wherein, exchange column internal diameter is 4mm, and resin bed height is 80cm, resin bed volume
For 10mL.
Using Na2SO3Dynamic desorption is carried out to above-mentioned gold loaded resin as strippant with the mixed solution of NaOH.Strippant
In: Na2SO3Concentration is 0.3mol/L, NaOH concentration 0.2mol/L.Strippant flow velocity is 4 resin bed volume/hours, dosage
For 35 resin bed volumes.With this condition, concentration golden in gained stripping liquid is 388.0mg/L, and golden desorption efficiency is
97.0%.
Embodiment 10:
Gold loaded resin used is in the same manner as in Example 9, using Na2SO3With the mixed solution of NaOH as strippant to above-mentioned
Gold loaded resin carries out dynamic desorption.In strippant: Na2SO3Concentration is 0.4mol/L, NaOH concentration 0.3mol/L.Desorbent stream
Speed is 3 resin bed volume/hours, and dosage is 32 resin bed volumes.With this condition, concentration golden in gained stripping liquid is
429.2mg/L, golden desorption efficiency are 98.1%.
Embodiment 11:
Gold loaded resin used is in the same manner as in Example 9, using Na2SO3With the mixed solution of NaOH as strippant to above-mentioned
Gold loaded resin carries out dynamic desorption.In strippant: Na2SO3Concentration is 0.5mol/L, NaOH concentration 0.4mol/L.Desorbent stream
Speed is 3 resin bed volume/hours, and dosage is 29 resin bed volumes.With this condition, concentration golden in gained stripping liquid is
476.0mg/L, golden desorption efficiency are 98.6%.
Embodiment 12:
Gold loaded resin used is in the same manner as in Example 9, using Na2SO3With the mixed solution of NaOH as strippant to above-mentioned
Gold loaded resin carries out dynamic desorption.In strippant: Na2SO3Concentration is 0.6mol/L, NaOH concentration 0.6mol/L.Desorbent stream
Speed is 2 resin bed volume/hours, and dosage is 27 resin bed volumes.With this condition, concentration golden in gained stripping liquid is
512.3mg/L, golden desorption efficiency are 98.8%.
Comparative example 7:
Gold loaded resin used is in the same manner as in Example 9, using NH4SCN solution as strippant to above-mentioned gold loaded resin into
Mobile state desorption.NH in strippant4SCN concentration is 2.5mol/L, and strippant flow velocity is 3 resin bed volume/hours, and dosage is
32 resin bed volumes.With this condition, concentration golden in gained stripping liquid is 406.0mg/L, and golden desorption efficiency is 92.8%.
Comparative example 8:
Gold loaded resin used is in the same manner as in Example 9, using Na2S4O6Solution as strippant to above-mentioned gold loaded resin into
Mobile state desorption.Na in strippant2S4O6Concentration is 2.5mol/L, and strippant flow velocity is 3 resin bed volume/hours, and dosage is
30 resin bed volumes.With this condition, concentration golden in gained stripping liquid is 441.9mg/L, and golden desorption efficiency is 94.7%.
Comparative example 9:
Gold loaded resin used is in the same manner as in Example 9, using NH4NO3Solution carries out above-mentioned gold loaded resin as strippant
Dynamic desorption.NH in strippant4NO3Concentration is 2.5mol/L, and strippant flow velocity is 3 resin bed volume/hours, dosage 34
A resin bed volume.With this condition, concentration golden in gained stripping liquid is 376.8mg/L, and golden desorption efficiency is 91.5%.
By above embodiments and comparative example as it can be seen that for a variety of different types and the different resins for carrying gold amount, using this hair
Bright method, utilizes Na2SO3Dynamic desorption is carried out with the mixed solution of NaOH, golden desorption efficiency is above existing single strippant
(ammonium thiocyanate, sodium tetrathionate or ammonium nitrate), desorption efficiency is up to 97% or more.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (3)
1. a kind of method of the co-desorption gold thiosulfate anion complex ion from strong-base anion-exchange resin, feature exist
In: with Na2SO3There is the strong alkalinity anion of golden thiosulfate anion complex ion to load as strippant with the mixed solution of NaOH
Exchanger resin carries out dynamic desorption；The Na2SO3In the mixed solution of NaOH, Na2SO3Concentration be 0.3mol/L~
The concentration of 0.6mol/L, NaOH are 0.2mol/L~0.6mol/L；The load gold amount of the strong-base anion-exchange resin is
5kg/t~20kg/t.
2. according to the method described in claim 1, it is characterized by: during the dynamic desorption, the flow velocity of strippant is 2~
4 resin bed volume/hours.
3. according to the method described in claim 2, it is characterized by: the dosage of strippant is 15 during the dynamic desorption
~35 resin bed volumes.
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| CN109652658B (en) * | 2019-02-27 | 2020-04-21 | 武汉理工大学 | Method for recovering noble metal complex ions from thiosulfate leaching solution by utilizing sulfide ore |
| CN109652647B (en) * | 2019-02-27 | 2020-04-21 | 武汉理工大学 | Process for recovering noble metals from molybdenum disulfide based on thiosulfate leaching method |
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| CN109706315B (en) * | 2019-02-27 | 2020-05-05 | 武汉理工大学 | Method for adsorbing noble metal complex ions in thiosulfate leaching solution by using molybdenum disulfide |
| CN109852815B (en) * | 2019-02-27 | 2020-04-21 | 武汉理工大学 | Method for recovering noble metal complex ions from thiosulfate leaching solution by utilizing molybdenum disulfide |
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