CN109536715A - A kind of zinc lixiviating solution Cobalt Purification method - Google Patents
A kind of zinc lixiviating solution Cobalt Purification method Download PDFInfo
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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
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
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- C22B7/008—Wet processes by an alkaline or ammoniacal leaching
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- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
- C22B23/0407—Leaching processes
- C22B23/0415—Leaching processes with acids or salt solutions except ammonium salts solutions
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- C22B23/00—Obtaining nickel or cobalt
- C22B23/04—Obtaining nickel or cobalt by wet processes
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- C22B23/0476—Separation of nickel from cobalt
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Abstract
The present invention relates to technical field of wet metallurgy, especially a kind of zinc lixiviating solution Cobalt Purification method, by using the Direct Electrolysis under magnetic field condition to handle zinc lixiviating solution, and accurate control is made to magnetic field strength, so that maintaining between 7-9A/m, the cobalt content of high degree reduced in electrolytic liquid improves the removal efficiency of cobalt, the recycling ability for realizing electrolytic liquid reduces zinc lixiviating solution except cobalt difficulty.
Description
Technical field
The present invention relates to technical field of wet metallurgy, especially a kind of zinc lixiviating solution Cobalt Purification method.
Background technique
The production of China's metallic zinc is essentially all using hydrometallurgy, that is, is exactly that will contain the mineral such as zinc or waste residue process
After acidleach or alkali leaching, leachate is obtained, then carry out electrolytic zinc for leachate as electrolyte.But contain in leachate
A large amount of impurity, such as: iron, nickel, cobalt, copper, cadmium, arsenic, indium etc., wherein cobalt is very harmful in zinc metallurgical process, is being electrolysed
In liquid, when the content of cobalt is more than a certain amount of, then it will lead to electrolytic efficiency and be decreased obviously, but also electrolysis zinc product can be seriously affected
Quality.Currently, in hydrometallurgy zinc, mainly using copper removal, again under the high temperature conditions is first replaced, antimonic salt or arsenic are set
Change nickel, cobalt；Or using the organic except two methods such as cobalt agent Cobalt Purifications of similar betanaphthol type.And it cleaned by displacement
Journey not only needs to consume a large amount of zinc powder, causes processing cost higher, but also the impurity such as antimony, arsenic is caused to enter, and influences final
The quality of product；And use it is organic except cobalt agent except cobalt handle, although not consuming a large amount of zinc powder, need to introduce organic matter at
Point, cause environment to be severely impacted, and also significantly increase in nickel, cobalt separating difficulty.
In general, the nickel cobalt waste residue containing zinc, after sulfuric acid leaching is handled, in the sulphuric leachate of acquisition, containing zinc ion
At concentrations up to 30g/L or more, and the content of nickel ion, cobalt ions is also in 1g/L or more at this time, by using P204、P507、C-
When 272 equal phosphorus extractants carry out separation and Extraction, discovery: when organic phase carries out saponifiable extraction cobalt ions, zinc ion also will quilt
Extraction, or even be preferably extracted, cause cobalt ions extraction efficiency unsatisfactory；And it finds after study, in time use pair
There is cobalt ions more highly selective C-272 to be extracted, and extraction yield also only has 80%.And in leachate treatment process,
Using potassium cloride, when being extracted using N235, zinc also can be with ZnCl4 2-Form is extracted by N235, causes zinc ion and cobalt ions
It is difficult to be separated well.
To sum up, the cobalt in zinc lixiviating solution is removed, the sulfuric acid leaching or salt Ore Leaching no matter used, is used
Extraction method is all difficult to so that zinc, cobalt are separated well.For this purpose, this researcher is studying for a long period of time containing zinc, nickel, cobalt purification
The experience of the synthetical recovery processing aspect of slag, and on the basis of early-stage study is containing zinc, nickel, cobalt purification Slag treatment (such as: specially
Benefit has made further research to the cobalt removing in zinc lixiviating solution, to reach shortening work application No. is 201711037253.6)
Skill process, optimization remove cobalt efficiency and ability, reduce cobalt content content in liquid after electrolysis, improve the quality of electrolytic zinc.
Summary of the invention
In order to solve the above technical problems existing in the prior art, the present invention provides a kind of zinc lixiviating solution Cobalt Purification side
Method.
It is achieved particular by following technical scheme:
Zinc lixiviating solution Cobalt Purification method, comprising the following steps:
(1) the nickel cobalt waste residue containing zinc is used into leaching with sodium hydroxide, obtains leachate；
(2) permanent magnet is installed in electrolytic cell two sides, is formed across the magnetic field of electrolytic cell, so that electrolytic cell is generally in magnetic field
In；Electrolytic cell is divided into anode region and cathodic region using diaphragm, and anode electrolytic cell is installed in anode region, and electrolytic cell yin is installed in cathodic region
Pole；Electrolytic condition uses voltage 3-3.5V, current density 500-1000A/m2, electrolysis temperature control is at 40-50 DEG C, electrolysing period
28-30h；Leachate is injected, be powered electrolysis；Collect the earth of positive pole and cathode mud, electrolytic liquid；The earth of positive pole is sold after hot water washs
Or raw material is prepared as metallic cobalt；Cathode mud is evaporated in vacuo after vacuum drying, separates metallic zinc；Distill waste residue
It is sold as metallic nickel raw materials for production or after hot water washs；
The same pole span of anode and cathode is 80-95mm；Magnetic field strength is 7-9A/m.
It is preferred that the same pole span of the anode and cathode is 88mm；Magnetic field strength is 8A/m.
It is preferred that the electrolytic liquid is used to return to the leaching process to the nickel cobalt waste residue containing zinc.
It is preferred that the nickel cobalt waste residue containing zinc is 88-90 DEG C using 60-80 DEG C of hot water washing, then in temperature, according to liquid
Gu mass ratio is 4-5:1, quality volume fraction be the sodium hydroxide solution leaching process 5h of 170-190g/L to get leachate and
Leached mud.
It is preferred that the leached mud passes through secondary leaching process, obtained secondary leachate returns to a leaching process；?
Arrive and secondary leached mud using after water washing, sulfuric acid leaching, electrolysis obtains metallic nickel.
It is preferred that the electrolytic liquid, by normal temperature, according to the total moles of antimony, arsenic in vulcanized sodium and electrolytic liquid
Number is than being after vulcanized sodium is added except antimony, arsenic in 2-4:1, to return again to the leaching process to the nickel cobalt waste residue containing zinc.
It is preferred that the anode is made using magnetic material, cathode is made using stainless steel.
It is preferred that the magnetic material is the permanent magnet of alkali corrosion resistance and electrochemical corrosion resistant.
This research in the course of the research, due to zinc ion (Zn2+) electronic configuration outermost electron be 3d10, do not have orphan
Electronics not will receive the influence of magnetic force so that zinc ion has stronger diamagnetism in magnetic field；And cobalt ions (Co2+) electricity
Son arrangement outermost electron is 3d7, there is lone electron pair, so that cobalt ions has compared with over paramagnetism, in magnetic field, it will by
The influence of magnetic force, so that magnetic deflection occurs for its electrolytic process in leachate, it is difficult to normally according to electrolysis direction (power line side
To) power on and parse in cathodic region, cathode；Zinc ion, cobalt ions is thus caused to be precipitated respectively in cathodic region, anode region；Meanwhile
Nickel ion (Ni2+) outermost electron arrangement be 3d8, do not have lone electron, so that nickel ion has stronger diamagnetism, in magnetic
It not will receive the influence of magnetic force in, and then cathodic region can be entered with zinc ion, thus high degree leaches zinc
Cobalt in liquid is separately separated out, and leachate is directly carried out electrolysis except cobalt is handled, and high degree shortens technique stream
Journey, and by the difference of later use metallic nickel, the fusing point of metallic zinc, boiling point, sublimation temperature point, it handles, makes by distillation
It obtains metallic zinc to be distilled off, realizes the separation respectively of nickel in leachate, cobalt, zinc, reduce separating difficulty.But it was studying
Cheng Zhong, hence it is evident that discovery: excessively high for magnetic field strength, it will the influence of high degree is distributed in electrolytic process intermediate ion, is caused
The quantity of oxygen, cation etc. that anode region occurs is influenced by high degree, and then will will affect cobalt ions (Co2+)
The oxidation eduction rate of anode region causes from electrolytic liquid except influence of the cobalt rate by high degree, and for magnetic field strength compared with
It is weak, it will to influence the ability that cobalt ions (Co2+) arrangement enters anode region, cause to be electrolysed the process of precipitation zinc, nickel in cathodic region
In, along with the precipitation of cobalt, high degree affects the quality of electrolysis zinc product, and is difficult to so that nickel, cobalt separate.
It finds after study: being less than 7A/m in magnetic field strength, that is, when using 6A/m processing, the cobalt content in cathode mud is caused to reach
3% or so, the cobalt content in the electrolytic liquid of cathodic region significantly increases, and has reached 0.15g/L or more；And it is big in magnetic field strength
In 9A/m, i.e., when handling using 10A/m, the cobalt content in the electrolytic liquid of anode region is caused to reach 0.4g/L or more.And for
When magnetic field strength is maintained between 7-9A/m, cathodic region electrolytic liquid, anode region electrolytic liquid cobalt content be not much different, maintain
It is detected between 0.001-0.003g/L, and after cathodic region electrolytic liquid is mixed with anode region electrolytic liquid, cobalt contains
Amount maintains between 0.08-0.11g/L, the cobalt content of high degree reduced in electrolytic liquid, so that after electrolysis, it will
Electrolytic liquid return prepares leachate, realizes recyclable, avoids discharging of waste liquid；And after returning it into and preparing leachate,
After the invention persistently carries out leaching process to leachate, the cobalt content in electrolytic liquid is still able to maintain that
0.10g/L or so, it is seen then that so that even if being still able to maintain that the cobalt in electrolytic liquid contains after repetitive cycling leaching process
Measure lower, realize the long-term circular treatment of electrolytic liquid, avoid the discharge of waste liquid, also reduce to liquid waste processing at
This；High degree reduces three wastes discharge amount.
Specific embodiment
It is limited below with reference to specific embodiment technical solution of the present invention is further, but claimed
Range is not only limited to made description.
In the examples below, anode is made using magnetic material (such as electromagnet, permanent magnet), what cathode used
It is that stainless steel is made；In particular by the magnetic material of alkali corrosion resistance and electrochemical corrosion resistant.
Embodiment 1
Leachate preparation and processing:
By the nickel cobalt waste residue containing zinc using the washing of 60 DEG C of hot water, then in temperature it is 88 DEG C, consolidate mass ratio according to liquid as 4:1,
Quality volume fraction is the sodium hydroxide solution leaching process 5h of 170g/L to get leachate and leached mud；
In leachate: 38.5g/L containing zinc, 0.9g/L containing cobalt, nickeliferous 0.08g/L, naoh concentration 149.1g/L；Leaching
In slagging tap: nickeliferous 6%.
It is 4:1 that leached mud, which is consolidated mass ratio according to liquid, and quality volume fraction is the secondary leaching of sodium hydroxide solution of 170g/L
Handle 5h out to get secondary leachate and secondary leached mud；
In secondary leachate: 19.3g/L containing zinc, 0.5g/L containing cobalt, nickeliferous 0.06g/L, naoh concentration 163.5g/
L.The secondary leachate returns to the sodium hydroxide solution leaching process of progress for being configured to that mass concentration is 180g/L.
Secondary leached mud uses sulfuric acid leaching, obtains sulphuric leachate, then sulphuric leachate is carried out electrolytic nickel.
Electrolytic cell installation and electrolysis:
Permanent magnet is installed in electrolytic cell two sides, is formed across the magnetic field of electrolytic cell, so that electrolytic cell is in magnetic field；
Electrolytic cell is divided into anode region and cathodic region using diaphragm, and anode electrolytic cell is installed in anode region, and electric tank cathode is installed in cathodic region；Electricity
Solution condition uses voltage 3-3.5V, current density 500-1000A/m2, electrolysis temperature control is at 40-50 DEG C, electrolysing period 28-
30h；Leachate is injected, be powered electrolysis；Collect the earth of positive pole and cathode mud, electrolytic liquid；The earth of positive pole sold after hot water washs or
Person prepares raw material as metallic cobalt；Cathode mud is evaporated in vacuo after vacuum drying, separates metallic zinc；Waste residue is distilled to make
It is sold for metallic nickel raw materials for production or after hot water washs；The same pole span of anode and cathode is 80mm；Magnetic field strength is 7A/
m。
The purity of metallic zinc is 99.51%, and cobalt content has reached 19.21% in anode body refuse.
Cathodic region electrolytic liquid, anode region electrolytic liquid are taken respectively, detect anode region electrolytic liquid, cathodic region electrolysis respectively
Cobalt content in liquid afterwards, and cobalt content, result such as table are detected after cathodic region electrolytic liquid, anode region electrolytic liquid are mixed
Shown in 1.
Embodiment 2
Leachate preparation and processing:
By the nickel cobalt waste residue containing zinc using the washing of 80 DEG C of hot water, then in temperature it is 90 DEG C, consolidate mass ratio according to liquid as 5:1,
Quality volume fraction is the sodium hydroxide solution leaching process 5h of 190g/L to get leachate and leached mud；
In leachate: 45.1g/L containing zinc, 1.4g/L containing cobalt, nickeliferous 0.13g/L, naoh concentration 150.8g/L；Leaching
In slagging tap: nickeliferous 9%.
It is 5:1 that leached mud, which is consolidated mass ratio according to liquid, and quality volume fraction is the secondary leaching of sodium hydroxide solution of 190g/L
Handle 5h out to get secondary leachate and secondary leached mud；
In secondary leachate: 16.7g/L containing zinc, 0.4g/L containing cobalt, nickeliferous 0.04g/L, naoh concentration 161.2g/
L.The secondary leachate returns to the sodium hydroxide solution leaching process of progress for being configured to that mass concentration is 180g/L.
Secondary leached mud uses sulfuric acid leaching, obtains sulphuric leachate, then sulphuric leachate is carried out electrolytic nickel.
Electrolytic cell installation and electrolysis:
Permanent magnet is installed in electrolytic cell two sides, is formed across the magnetic field of electrolytic cell, so that electrolytic cell is in magnetic field；
Electrolytic cell is divided into anode region and cathodic region using diaphragm, and anode electrolytic cell is installed in anode region, and electric tank cathode is installed in cathodic region；Electricity
Solution condition uses voltage 3-3.5V, current density 500-1000A/m2, electrolysis temperature control is at 40-50 DEG C, electrolysing period 28-
30h；Leachate is injected, be powered electrolysis；Collect the earth of positive pole and cathode mud, electrolytic liquid；The earth of positive pole sold after hot water washs or
Person prepares raw material as metallic cobalt；Cathode mud is evaporated in vacuo after vacuum drying, separates metallic zinc；Waste residue is distilled to make
It is sold for metallic nickel raw materials for production or after hot water washs；The same pole span of anode and cathode is 95mm；Magnetic field strength is 9A/
m。
The purity of metallic zinc is 99.46%, and cobalt content has reached 18.75% in anode body refuse.
Cathodic region electrolytic liquid, anode region electrolytic liquid are taken respectively, detect anode region electrolytic liquid, cathodic region electrolysis respectively
Cobalt content in liquid afterwards, and cobalt content, result such as table are detected after cathodic region electrolytic liquid, anode region electrolytic liquid are mixed
Shown in 1.
Embodiment 3
Leachate preparation and processing:
By the nickel cobalt waste residue containing zinc using the washing of 70 DEG C of hot water, then in temperature it is 89 DEG C, consolidate mass ratio according to liquid is 4.5:
1, quality volume fraction is the sodium hydroxide solution leaching process 5h of 180g/L to get leachate and leached mud；
In leachate: 43.1g/L containing zinc, 1.3g/L containing cobalt, nickeliferous 0.11g/L, naoh concentration 149.8g/L；Leaching
In slagging tap: nickeliferous 7%.
It is 4.5:1 that leached mud, which is consolidated mass ratio according to liquid, and quality volume fraction is that the sodium hydroxide solution of 180g/L is secondary
Leaching process 5h is to get secondary leachate and secondary leached mud；
In secondary leachate: 18.6g/L containing zinc, 0.45g/L containing cobalt, nickeliferous 0.05g/L, naoh concentration are
162.6g/L.The secondary leachate, which returns, to be configured at the primary leaching of sodium hydroxide solution progress that mass concentration is 180g/L
Reason.
Secondary leached mud uses sulfuric acid leaching, obtains sulphuric leachate, then sulphuric leachate is carried out electrolytic nickel.
Electrolytic cell installation and electrolysis:
Permanent magnet is installed in electrolytic cell two sides, is formed across the magnetic field of electrolytic cell, so that electrolytic cell is in magnetic field；
Electrolytic cell is divided into anode region and cathodic region using diaphragm, and anode electrolytic cell is installed in anode region, and electric tank cathode is installed in cathodic region；Electricity
Solution condition uses voltage 3-3.5V, current density 500-1000A/m2, electrolysis temperature control is at 40-50 DEG C, electrolysing period 28-
30h；Leachate is injected, be powered electrolysis；Collect the earth of positive pole and cathode mud, electrolytic liquid；The earth of positive pole sold after hot water washs or
Person prepares raw material as metallic cobalt；Cathode mud is evaporated in vacuo after vacuum drying, separates metallic zinc；Waste residue is distilled to make
It is sold for metallic nickel raw materials for production or after hot water washs；The same pole span of anode and cathode is 88mm；Magnetic field strength is 8A/
m。
The purity of metallic zinc is 99.49%, and cobalt content has reached 18.86% in anode body refuse.
Cathodic region electrolytic liquid, anode region electrolytic liquid are taken respectively, detect anode region electrolytic liquid, cathodic region electrolysis respectively
Cobalt content in liquid afterwards, and cobalt content, result such as table are detected after cathodic region electrolytic liquid, anode region electrolytic liquid are mixed
Shown in 1.
Embodiment 4
On the basis of embodiment 1, magnetic field strength 6A/m.The purity of metallic zinc is 98.76%, cobalt content in anode body refuse
Reach 17.43%.
Cathodic region electrolytic liquid, anode region electrolytic liquid are taken respectively, detect anode region electrolytic liquid, cathodic region electrolysis respectively
Cobalt content in liquid afterwards, and cobalt content, result such as table are detected after cathodic region electrolytic liquid, anode region electrolytic liquid are mixed
Shown in 1.
Embodiment 5
On the basis of embodiment 1, magnetic field strength 10A/m.The purity of metallic zinc is 99.41%, and cobalt contains in anode body refuse
Amount has reached 19.03%.
Cathodic region electrolytic liquid, anode region electrolytic liquid are taken respectively, detect anode region electrolytic liquid, cathodic region electrolysis respectively
Cobalt content in liquid afterwards, and cobalt content, result such as table are detected after cathodic region electrolytic liquid, anode region electrolytic liquid are mixed
Shown in 1.
Embodiment 6
1 two leachates returns of embodiment are configured to the sodium hydroxide solution that mass concentration is 180g/L once to be soaked
It handles out, obtained leachate is (containing zinc: 42.8g/L, 0.9g/L containing cobalt, nickeliferous 0.09g/L, naoh concentration 150.4g/
L；In leached mud: nickeliferous 8%.), electrolysis processing is carried out according to the processing method of embodiment 1.
Cathodic region electrolytic liquid, anode region electrolytic liquid are taken respectively, detect anode region electrolytic liquid, cathodic region electrolysis respectively
Cobalt content in liquid afterwards, and cobalt content, result such as table are detected after cathodic region electrolytic liquid, anode region electrolytic liquid are mixed
Shown in 1.
Embodiment 7
The electrolytic liquid of embodiment 1 is returned to the sodium hydroxide solution for preparing that quality volume fraction is 170g/L, to containing zinc
Nickel cobalt waste residue according to liquid consolidate mass ratio be 4:1, be added leaching process 5h to get leachate (contain zinc: 44.2g/L, contain cobalt
1.43g/L, nickeliferous 0.12g/L, naoh concentration 149.7g/L), it is carried out at electrolysis according to the processing method of embodiment 1
Reason.
Cathodic region electrolytic liquid, anode region electrolytic liquid are taken respectively, detect anode region electrolytic liquid, cathodic region electrolysis respectively
Cobalt content in liquid afterwards, and cobalt content, result such as table are detected after cathodic region electrolytic liquid, anode region electrolytic liquid are mixed
Shown in 1.
1 cathodic region of table, the cobalt content and mixed cobalt content (unit: g/L) of anode region respectively
| Cathodic region electrolytic liquid | Anode region electrolytic liquid | Electrolytic liquid | |
| Embodiment 1 | 0.0400 | 0.0410 | 0.0810 |
| Embodiment 2 | 0.0480 | 0.0510 | 0.0980 |
| Embodiment 3 | 0.0485 | 0.0505 | 0.0990 |
| Embodiment 4 | 0.1771 | 0.1770 | 0.3541 |
| Embodiment 5 | 0.1597 | 0.4135 | 0.5732 |
| Embodiment 6 | 0.0422 | 0.0445 | 0.0867 |
| Embodiment 7 | 0.0482 | 0.0497 | 0.0979 |
Shown by the data of table 1 as it can be seen that the invention by processing after, can be effectively by the cobalt in electrolytic liquid
Content significantly reduces, reach 0.1g/L hereinafter, and the cobalt content of electrolytic liquid is not much different in cathodic region, anode region,
It can be realized equiblibrium mass distribution, a large amount of cobalt ions be precipitated from anode, it is ensured that process is recycled in electrolytic liquid
In cobalt content it is lower, improve recyclability, reduce waste liquid discharging amount.
In the invention research process, in order to sufficiently realize the circulation of electrolytic liquid, and to electrolytic liquid into
Row removal of impurities processing, by electrolytic liquid, at normal temperature, the total mole number ratio according to antimony in vulcanized sodium and electrolytic liquid, arsenic is 2-4:1
After vulcanized sodium is added except antimony, arsenic, the leaching process to the nickel cobalt waste residue containing zinc is returned again to.
Above embodiments are only limitted to make further explanation and explanation to the technical solution of the invention, for ability
Field technique personnel fully understand the invention, are not to make further limit to the technical solution of the invention
Fixed, those skilled in the art make the improvement of non-protruding essential characteristics and non-significant progress on this basis, belong to this hair
The protection scope of bright creation.
Claims (8)
1. a kind of zinc lixiviating solution Cobalt Purification method, which comprises the following steps:
(1) the nickel cobalt waste residue containing zinc is used into leaching with sodium hydroxide, obtains leachate；
(2) permanent magnet is installed in electrolytic cell two sides, is formed across the magnetic field of electrolytic cell, so that electrolytic cell is in magnetic field；
Electrolytic cell is divided into anode region and cathodic region using diaphragm, and anode electrolytic cell is installed in anode region, and electric tank cathode is installed in cathodic region；Electricity
Solution condition uses voltage 3-3.5V, current density 500-1000A/m2, electrolysis temperature control is at 40-50 DEG C, electrolysing period 28-
30h；Leachate is injected, be powered electrolysis；Collect the earth of positive pole and cathode mud, electrolytic liquid；The earth of positive pole sold after hot water washs or
Person prepares raw material as metallic cobalt；Cathode mud is evaporated in vacuo after vacuum drying, separates metallic zinc；Waste residue is distilled to make
It is sold for metallic nickel raw materials for production or after hot water washs；
The same pole span of anode and cathode is 80-95mm；Magnetic field strength is 7-9A/m.
2. zinc lixiviating solution Cobalt Purification method as described in claim 1, which is characterized in that the homopolarity of the anode and cathode
Away from for 88mm；Magnetic field strength is 8A/m.
3. zinc lixiviating solution Cobalt Purification method as described in claim 1, which is characterized in that the electrolytic liquid is for returning
To the leaching process of the nickel cobalt waste residue containing zinc.
4. zinc lixiviating solution Cobalt Purification method as described in claim 1, which is characterized in that the nickel cobalt waste residue containing zinc is adopted
Washed with 60-80 DEG C of hot water, then temperature be 88-90 DEG C, according to liquid consolidate mass ratio be 4-5:1, quality volume fraction be 170-
The sodium hydroxide solution leaching process 5h of 190g/L is to get leachate and leached mud.
5. zinc lixiviating solution Cobalt Purification method as claimed in claim 4, which is characterized in that the leached mud passes through secondary leaching
It handles out, obtained secondary leachate returns to a leaching process；Obtain and secondary leached mud using after water washing, sulfuric acid leaching
Out, electrolysis obtains metallic nickel.
6. zinc lixiviating solution Cobalt Purification method as claimed in claim 1 or 3, which is characterized in that the electrolytic liquid is passed through
At normal temperature, it is after vulcanized sodium is added except antimony, arsenic in 2-4:1 according to the total mole number ratio of antimony in vulcanized sodium and electrolytic liquid, arsenic, then
Return to the leaching process to the nickel cobalt waste residue containing zinc.
7. zinc lixiviating solution Cobalt Purification method as claimed in claim 1 or 2, which is characterized in that the anode is using magnetic
Material is made, and cathode is made using stainless steel.
8. zinc lixiviating solution Cobalt Purification method as claimed in claim 7, which is characterized in that the magnetic material is alkaline-resisting corruption
The permanent magnet of erosion and electrochemical corrosion resistant.
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| CN110904470A (en) * | 2019-11-22 | 2020-03-24 | 西北矿冶研究院 | Electrolysis device |
| CN111676490A (en) * | 2020-05-22 | 2020-09-18 | 西北矿冶研究院 | Method for optimizing zinc electrodeposition process |
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