CN108913892A - A method of the comprehensively recovering valuable metal from the pickle liquor of cupric - Google Patents
A method of the comprehensively recovering valuable metal from the pickle liquor of cupric Download PDFInfo
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- CN108913892A CN108913892A CN201810815349.9A CN201810815349A CN108913892A CN 108913892 A CN108913892 A CN 108913892A CN 201810815349 A CN201810815349 A CN 201810815349A CN 108913892 A CN108913892 A CN 108913892A
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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
- C22B3/44—Treatment or purification of solutions, e.g. obtained by leaching by chemical 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
- 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
- C22B15/00—Obtaining copper
- C22B15/0063—Hydrometallurgy
- C22B15/0084—Treating solutions
- C22B15/0089—Treating solutions by chemical methods
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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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/26—Refining solutions containing zinc values, e.g. obtained by leaching zinc ores
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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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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/12—Electrolytic production, recovery or refining of metals by electrolysis of solutions of copper
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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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Abstract
The present invention relates to a kind of methods of comprehensively recovering valuable metal in pickle liquor from cupric, including being fired the pickle liquor of the resulting cupric of acid leaching process to gold and silver concentrate through multi-stage oxidizing, charcoal adsorbs gold and silver, chelate copper ion, vulcanize heavy zinc, precipitated iron, chelate decomposes, acid copper and etc., by the present invention in that forming highly stable chelate with the copper ion of polyvinyl alcohol and divalent, fully and completely first it is about to copper ion to protect, so as to use NaHS individually to precipitate zinc ion, copper and zinc are completely separated and all obtain recycling and reusing, reprecipitation iron later, chelate obtains copper after decomposing, compared with traditional Extraction electrodeposition technique, zinc and iron are not only effectively recycled, also improve the rate of recovery of copper.
Description
Technical field
The present invention relates to integrate back in a kind of recovery method of valuable metal more particularly to a kind of pickle liquor from Gold Concentrate under Normal Pressure
The method for receiving valuable metal, belongs to field of chemical metallurgical technology.
Background technique
In recent years, in gold smelting field cupric gold and silver concentrate baking cyaniding technique, be to adopt the concentrate of cupric gold and silver
Slurry type feeding is roasted at a certain temperature with the oxygen in air after being sized mixing with water, and roasting gained high-temperature flue gas enters sulfuric acid
Production technology, gained calcining and dilute sulfuric acid carry out acidleach, output cupric pickle liquor, gained cupric acidleach under the conditions of certain acidleach
Enter extraction electrodeposition technique after liquid, extraction is the key step of modern wet-milling processing (Leaching-solvent Extraction-electrowinning Technology, L-SX-EW)
Suddenly.With the exploitation of efficient, stable copper extractant, the hydrometallurgy of copper has obtained huge development.Currently, the whole world 20%
Copper is produced by Extraction electrodeposition technique.
Although good recycling, the zinc contained in Gold Concentrate under Normal Pressure can be obtained by traditional Extraction electrodeposition technique in copper metal
Recycling with ferrous metal is but always a problem, and the zinc and ferrous metal contained in Gold Concentrate under Normal Pressure is immersed during acidleach with copper together
Out, in existing technique, what the raffinate waste liquid (containing remaining a small amount of copper simultaneously) containing zinc and iron was neutralized using lime
Mode is handled, so that zinc and iron enter the bottom ash of lime neutralization, not only causes the waste of zinc and iron resource in this way, and
And higher cost is neutralized, gained bottom ash can partially be sold to cement plant and do raw materials for production, and remainder can only be stored up, not only be accounted in this way
With a large amount of soils, and ambient enviroment is caused to seriously affect, as national conservation-minded society, environment-friendly type social construction mention
Out, carry out effective recycling of metallic zinc and iron in cupric pickle liquor, reduce outlet and the research in neutralisation treatment cost direction with answer
With rather important.
Summary of the invention
The present invention provides a kind of from containing for deficiency present in valuable careful recovery method in the pickle liquor of Gold Concentrate under Normal Pressure
The method of comprehensively recovering valuable metal in the pickle liquor of copper.
The technical solution that the present invention solves above-mentioned technical problem is as follows：
A method of the comprehensively recovering valuable metal from the pickle liquor of cupric includes the following steps：
1) multi-stage oxidizing：It is concatenated that the pickle liquor that gold and silver concentrate is fired the resulting cupric of acid leaching process is introduced several
In stirred tank, hydrogen peroxide and potassium permanganate are added into stirred tank, the additional amount of hydrogen peroxide is 3-5kg/m3, potassium permanganate plus
Entering amount is 0.5-1.0kg/m3, oxidated solution is obtained after oxidation 3-5 hours；
2) charcoal adsorbs gold and silver：So that oxidated solution obtained in step 1) is flowed through activated carbon adsorption device, controls oxidated solution
Flow velocity be 10-20m3/ h, liquid after output absorption after absorption, gold, silver are effectively adsorbed in active carbon at this time, the load gold and silver of output
Active carbon carries out smelting recycling, output gold and silver product；
3) copper ion is chelated：Molecular weight is added after to the resulting absorption of step 2) in liquid in 150,000 polyvinyl alcohol below,
The additional amount for controlling polyvinyl alcohol is 7-10g/L, is heated to 65-75 DEG C under constant agitation, makes to react resulting copper chela
Conjunction object, which is dissolved in aqueous solution, forms uniform solution；
4) vulcanize heavy zinc：The resulting solution of step 3) is introduced into several concatenated stirred tanks, is added into stirred tank
NaHS, the additional amount of NaHS are 10-20g/L, and the rate of deposition of zinc reaches 93-95% after vulcanization 1-2 hours, consolidate
Liquid separates to obtain zinc sulphide residue product and liquid after the heavy zinc of vulcanization；
5) precipitated iron：Inorganic base is added in liquid after heavy zinc to resulting vulcanize of step 4), with precipitate iron ion therein and
Ferrous ion, precipitating after the completion of filter iron oxide and precipitating after liquid；
6) chelate decomposes：Sodium hydrogensulfite, the addition of sodium hydrogensulfite is added in liquid after to the resulting precipitating of step 5)
Amount is 20~30g/L, decomposes copper chelate under the conditions of being stirred continuously and restores copper ion, and reaction is contained for 1~2 hour
The solution of univalent copper ion；
7) acid copper：The resulting solution containing univalent copper ion of step 6) is generated into tough cathode through electrodeposition process.
Further, the pickle liquor of cupric described in step 1) 0.03-0.06g/m containing gold3, argentiferous 0.01-0.05g/m3, contain
Copper 1-10g/l, iron content 3-10g/l, 2-8kg/m containing zinc3。
Further, the pickle liquor of cupric described in step 1) obtains by the following method：
I is sized mixing roasting：Gold and silver concentrate is sized mixing with water, control pulp density is 50-70wt%, after ore pulp is placed in 500-
Roast to obtain high-temperature flue gas and calcining at 650 DEG C, roasting refer to gold and silver concentrate make in calciner inflammable substance sulphur, arsenic, carbon,
The clean-burning process of the elements such as selenium, gained high-temperature flue gas enter sulfuric acid production process output arsenic trioxide product and sulphuric acid production
Product；
II acidleach：Calcining is mixed with dilute sulfuric acid and is sized mixing, control pulp density is 30-35wt%, after ore pulp is placed in 50-
Acidleach is carried out under the conditions of 70 DEG C, after will separation of solid and liquid obtain the pickle liquor of acid leaching residue and cupric containing gold and silver, gained is containing gold and silver
Acid leaching residue enters recovery for Au and Ag system recycling gold and silver.
Further, the mass concentration of dilute sulfuric acid described in step II acid leaching process is 1-2.5wt%, leaching time control
It is 2-4 hours.
Further, the stirred tank in step 1) and step 4) is 3-5 concatenated stirred tanks.
Further, the mixing speed control of stirred tank is 50-80r/min in step 1), the stirring of stirred tank in step 4)
Speed control is 20-40r/min.
Further, the control of adsorption process described in step 2) is 4-6 hours.
The beneficial effects of the invention are as follows：
1) by the present invention in that forming highly stable chelate with the copper ion of polyvinyl alcohol and divalent, fully and completely
First it is about to copper ion to protect, so as to use NaHS individually to precipitate zinc ion, copper and zinc is completely separated simultaneously all
Recycling and reusing is obtained, reprecipitation iron, chelate obtain copper after decomposing later, compared with traditional Extraction electrodeposition technique, not only
Zinc and iron effectively have been recycled, has also improved the rate of recovery of copper；
2) present invention by carrying out multi-stage oxidizing to cupric pickle liquor, charcoal adsorbs gold and silver, chelating copper ion, vulcanize heavy zinc,
The integrated treatment of the multi-steps such as precipitated iron, chelate decomposition, acid copper, efficiently solves zinc ion in cupric pickle liquor liquid
It is difficult to handle with iron, is difficult to the technical problem recycled comprehensively；
3) due to the basic Whote-wet method closed cycle of whole set process process, the circulation comprehensive benefit of cupric pickle liquor is significantly improved
With efficiency, wastewater zero discharge is realized, reduces the pollution to ambient enviroment, finally improves the economic benefit of enterprise.
Specific embodiment
Principles and features of the present invention are described below in conjunction with example, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
The 0.03-0.06g/m containing gold of the pickle liquor of raw material cupric used in the embodiment of the present invention3, argentiferous 0.01-
0.05g/m3, cupric 1-10g/l, iron content 3-10g/l, 2-8kg/m containing zinc3, production obtains by the following method：
I is sized mixing roasting：Gold and silver concentrate is sized mixing with water, control pulp density is 50-70wt%, after ore pulp is placed in 500-
Roast to obtain high-temperature flue gas and calcining at 650 DEG C, roasting refer to gold and silver concentrate make in calciner inflammable substance sulphur, arsenic, carbon,
The clean-burning process of the elements such as selenium, gained high-temperature flue gas enter sulfuric acid production process output arsenic trioxide product and sulphuric acid production
Product；
II acidleach：Calcining is mixed with the dilute sulfuric acid that mass concentration is 1-2.5wt% and is sized mixing, control pulp density is 30-
35wt%, after ore pulp is placed in 50-70 DEG C under the conditions of carry out acidleach, after acidleach 2-4 hours will separation of solid and liquid obtain containing gold and silver
The pickle liquor of acid leaching residue and cupric, acid leaching residue of the gained containing gold and silver enter recovery for Au and Ag system recycling gold and silver.
Embodiment 1：
A method of the comprehensively recovering valuable metal from the pickle liquor of cupric includes the following steps：
1) multi-stage oxidizing：The pickle liquor that gold and silver concentrate is fired the resulting cupric of acid leaching process is introduced 3 concatenated to stir
It mixes in slot, hydrogen peroxide and potassium permanganate is added into stirred tank, the additional amount of hydrogen peroxide is 3kg/m3, the additional amount of potassium permanganate
For 1.0kg/m3, mixing speed 60r/min, oxidation 3 hours after oxidated solution；
2) charcoal adsorbs gold and silver：So that oxidated solution obtained in step 1) is flowed through activated carbon adsorption device, controls oxidated solution
Flow velocity be 15m3/ h, liquid after output absorption after circulation absorption 4 hours, gold, silver are effectively adsorbed in active carbon at this time, output
It carries gold and silver active carbon and carries out smelting recycling, output gold and silver product；
3) copper ion is chelated：PVAC polyvinylalcohol 2699 is added after to the resulting absorption of step 2) in liquid, controls polyvinyl alcohol
Additional amount be 10g/L, be heated to 65-75 DEG C under constant agitation, make to react resulting copper chelate be dissolved in it is water-soluble
Uniform solution is formed in liquid；
4) vulcanize heavy zinc：The resulting solution of step 3) is introduced into 3 concatenated stirred tanks, sulphur hydrogen is added into stirred tank
Change sodium, the additional amount of NaHS is 20g/L, mixing speed 20r/min, and the rate of deposition of zinc reaches 93- after vulcanization 1 hour
95%, it carries out being separated by solid-liquid separation to obtain zinc sulphide residue product and liquid after the heavy zinc of vulcanization；
5) precipitated iron：Sodium hydroxide is added in liquid after to the heavy zinc of the resulting vulcanization of step 4), adjusting pH is 10-11, with heavy
Form sediment iron ion and ferrous ion therein, precipitating after the completion of filter iron oxide and precipitating after liquid；
6) chelate decomposes：Sodium hydrogensulfite, the addition of sodium hydrogensulfite is added in liquid after to the resulting precipitating of step 5)
Amount is 20g/L, decomposes copper chelate under the conditions of being stirred continuously and restores copper ion, and reaction obtains after 2 hours containing monovalence
The solution of copper ion；
7) acid copper：The resulting solution containing univalent copper ion of step 6) is generated into tough cathode through electrodeposition process.
Embodiment 2：
A method of the comprehensively recovering valuable metal from the pickle liquor of cupric includes the following steps：
1) multi-stage oxidizing：The pickle liquor that gold and silver concentrate is fired the resulting cupric of acid leaching process is introduced 5 concatenated to stir
It mixes in slot, hydrogen peroxide and potassium permanganate is added into stirred tank, the additional amount of hydrogen peroxide is 5kg/m3, the additional amount of potassium permanganate
For 0.5kg/m3, mixing speed 50r/min, oxidation 5 hours after oxidated solution；
2) charcoal adsorbs gold and silver：So that oxidated solution obtained in step 1) is flowed through activated carbon adsorption device, controls oxidated solution
Flow velocity be 10m3/ h, liquid after output absorption after circulation absorption 5 hours, gold, silver are effectively adsorbed in active carbon at this time, output
It carries gold and silver active carbon and carries out smelting recycling, output gold and silver product；
3) copper ion is chelated：PVAC polyvinylalcohol 1788 is added after to the resulting absorption of step 2) in liquid, controls polyvinyl alcohol
Additional amount be 8g/L, be heated to 65-75 DEG C under constant agitation, make to react resulting copper chelate and be dissolved in aqueous solution
Middle formation uniform solution；
4) vulcanize heavy zinc：The resulting solution of step 3) is introduced into 5 concatenated stirred tanks, sulphur hydrogen is added into stirred tank
Change sodium, the additional amount of NaHS is 10g/L, mixing speed 40r/min, and the rate of deposition of zinc reaches 93- after vulcanization 2 hours
95%, it carries out being separated by solid-liquid separation to obtain zinc sulphide residue product and liquid after the heavy zinc of vulcanization；
5) precipitated iron：Potassium hydroxide is added in liquid after to the heavy zinc of the resulting vulcanization of step 4), adjusting pH is 10-11, with heavy
Form sediment iron ion and ferrous ion therein, precipitating after the completion of filter iron oxide and precipitating after liquid；
6) chelate decomposes：Sodium hydrogensulfite, the addition of sodium hydrogensulfite is added in liquid after to the resulting precipitating of step 5)
Amount is 25g/L, decomposes copper chelate under the conditions of being stirred continuously and restores copper ion, and reaction is obtained containing monovalence copper for 1 hour
The solution of ion；
7) acid copper：The resulting solution containing univalent copper ion of step 6) is generated into tough cathode through electrodeposition process.
Embodiment 3：
A method of copper and zinc effectively being recycled from the pickle liquor of Gold Concentrate under Normal Pressure, is included the following steps：
1) multi-stage oxidizing：The pickle liquor that gold and silver concentrate is fired the resulting cupric of acid leaching process is introduced 3 concatenated to stir
It mixes in slot, hydrogen peroxide and potassium permanganate is added into stirred tank, the additional amount of hydrogen peroxide is 4kg/m3, the additional amount of potassium permanganate
For 0.8kg/m3, mixing speed 80r/min, oxidation 4 hours after oxidated solution；
2) charcoal adsorbs gold and silver：So that oxidated solution obtained in step 1) is flowed through activated carbon adsorption device, controls oxidated solution
Flow velocity be 20m3/ h, liquid after output absorption after circulation absorption 6 hours, gold, silver are effectively adsorbed in active carbon at this time, output
It carries gold and silver active carbon and carries out smelting recycling, output gold and silver product；
3) copper ion is chelated：Polyvinyl alcohol PVA24 99 is added after to the resulting absorption of step 2) in liquid, controls polyvinyl alcohol
Additional amount be 7g/L, be heated to 65-75 DEG C under constant agitation, make to react resulting copper chelate and be dissolved in aqueous solution
Middle formation uniform solution；
4) vulcanize heavy zinc：The resulting solution of step 3) is introduced into 5 concatenated stirred tanks, sulphur hydrogen is added into stirred tank
Change sodium, the additional amount of NaHS is 15g/L, mixing speed 30r/min, and the rate of deposition of zinc reaches 93- after vulcanization 2 hours
95%, it carries out being separated by solid-liquid separation to obtain zinc sulphide residue product and liquid after the heavy zinc of vulcanization；
5) precipitated iron：Potassium hydroxide is added in liquid after to the heavy zinc of the resulting vulcanization of step 4), adjusting pH is 10-11, with heavy
Form sediment iron ion and ferrous ion therein, precipitating after the completion of filter iron oxide and precipitating after liquid；
6) chelate decomposes：Sodium hydrogensulfite, the addition of sodium hydrogensulfite is added in liquid after to the resulting precipitating of step 5)
Amount is 30g/L, decomposes copper chelate under the conditions of being stirred continuously and restores copper ion, and reaction is obtained containing monovalence copper for 1 hour
The solution of ion；
7) acid copper：The resulting solution containing univalent copper ion of step 6) is generated into tough cathode through electrodeposition process.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (7)
1. a kind of method of comprehensively recovering valuable metal in pickle liquor from cupric, which is characterized in that include the following steps：
1) multi-stage oxidizing：The pickle liquor that gold and silver concentrate is fired the resulting cupric of acid leaching process is introduced into several concatenated stirrings
In slot, hydrogen peroxide and potassium permanganate are added into stirred tank, the additional amount of hydrogen peroxide is 3~5kg/m3, the addition of potassium permanganate
Amount is 0.5~1.0kg/m3, oxidated solution is obtained after oxidation 3~5 hours；
2) charcoal adsorbs gold and silver：So that oxidated solution obtained in step 1) is flowed through activated carbon adsorption device, controls the stream of oxidated solution
Speed is 10~20m3/ h, liquid after output absorption after absorption, gold, silver are effectively adsorbed in active carbon at this time, and the load gold and silver of output is living
Property charcoal carries out smelting recycling, output gold and silver product；
3) copper ion is chelated：Molecular weight is added after to the resulting absorption of step 2) in liquid in 150,000 polyvinyl alcohol below, control
The additional amount of polyvinyl alcohol is 7~10g/L, is heated to 65~75 DEG C under constant agitation, makes to react resulting copper chelating
Object, which is dissolved in aqueous solution, forms uniform solution；
4) vulcanize heavy zinc：The resulting solution of step 3) is introduced into several concatenated stirred tanks, sulphur hydrogen is added into stirred tank
Change sodium, the additional amount of NaHS is 10~20g/L, and the rate of deposition of zinc reaches 93~95% after vulcanization 1~2 hour, consolidate
Liquid separates to obtain zinc sulphide residue product and liquid after the heavy zinc of vulcanization；
5) precipitated iron：Inorganic base is added in liquid after to the heavy zinc of the resulting vulcanization of step 4), to precipitate iron ion and ferrous iron therein
Ion, precipitating after the completion of filter iron oxide and precipitating after liquid；
6) chelate decomposes：Sodium hydrogensulfite is added in liquid after to the resulting precipitating of step 5), the additional amount of sodium hydrogensulfite is
20~30g/L decomposes copper chelate and restores copper ion under the conditions of being stirred continuously, reaction is obtained containing monovalence for 1~2 hour
The solution of copper ion；
7) acid copper：The resulting solution containing univalent copper ion of step 6) is generated into tough cathode through electrodeposition process.
2. the method according to claim 1, wherein the pickle liquor of cupric described in step 1) 0.03- containing gold
0.06g/m3, argentiferous 0.01-0.05g/m3, cupric 1-10g/l, iron content 3-10g/l, 2-8kg/m containing zinc3。
3. according to the method described in claim 2, it is characterized in that, the pickle liquor of cupric described in step 1) is by such as lower section
What method obtained：
I is sized mixing roasting：Gold and silver concentrate is sized mixing with water, control pulp density is 50~70wt%, after ore pulp is placed in 500~
Roast to obtain high-temperature flue gas and calcining at 650 DEG C, roasting refer to gold and silver concentrate make in calciner inflammable substance sulphur, arsenic, carbon,
The clean-burning process of the elements such as selenium, gained high-temperature flue gas enter sulfuric acid production process output arsenic trioxide product and sulphuric acid production
Product；
II acidleach：Calcining is mixed with dilute sulfuric acid and is sized mixing, control pulp density is 30-35wt%, after ore pulp is placed in 50~70
Acidleach is carried out under the conditions of DEG C, after will separation of solid and liquid obtain the pickle liquor of acid leaching residue and cupric containing gold and silver, acid of the gained containing gold and silver
Phase analysis enters recovery for Au and Ag system recycling gold and silver.
4. according to the method described in claim 3, it is characterized in that, the quality of dilute sulfuric acid described in step II acid leaching process is dense
Degree is 1-2.5wt%, and leaching time control is 2-4 hours.
5. method according to claim 1 or 2, which is characterized in that the stirred tank in step 1) and step 4) is 3-5 string
The stirred tank of connection.
6. according to the method described in claim 5, it is characterized in that, it is 50- that the mixing speed of stirred tank, which controls, in step 1)
80r/min, the mixing speed control of stirred tank is 20-40r/min in step 4).
7. method according to claim 1 or 2, which is characterized in that the control of adsorption process described in step 2) is that 4-6 is small
When.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110668550A (en) * | 2019-10-18 | 2020-01-10 | 广西森合高新科技股份有限公司 | Gold concentrate non-cyanide beneficiation tailing liquid recycling treatment method |
| CN110819815A (en) * | 2019-12-03 | 2020-02-21 | 山东国大黄金股份有限公司 | Waste acid purification method |
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