CN106435214B - The method of demagging is gone in a kind of zinc abstraction system - Google Patents
The method of demagging is gone in a kind of zinc abstraction system Download PDFInfo
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- CN106435214B CN106435214B CN201611000216.3A CN201611000216A CN106435214B CN 106435214 B CN106435214 B CN 106435214B CN 201611000216 A CN201611000216 A CN 201611000216A CN 106435214 B CN106435214 B CN 106435214B
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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
- C22B19/22—Obtaining zinc otherwise than by distilling with leaching with acids
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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
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
Abstract
The present invention relates to a kind of methods that demagging is gone in zinc abstraction system, belong to technical field of wet metallurgy；The method of demagging is gone in the zinc abstraction system comprising the following specific steps (1) fine grinding；(2) electrolytic liquid is diluted；(3) zinc calcine leaches magnesium in advance；(4) zinc is recycled；(5) magnesium is precipitated.The present invention does not generate efflux wastewater, magnesium is discharged in the form of calcium and magnesium slag, it can be used as cement producting material, its principle is the magnesium leached in advance in zinc calcine using electrolytic liquid, zinc sulfate in calcining in zinc oxide and solution generates basic zinc sulfate precipitating, and the basic zinc sulfate of generation, which directly returns, leaches process, and magnesium stays in the solution, so that electrolytic liquid is opened a way from system while making calcining using electrolytic liquid preimpregnation de-magging, plays the role of dual demagging；Liquid adds a small amount of lime neutralization precipitation magnesium again after heavy zinc, and solution returns to preimpregnation magnesium and heavy zinc process as diluent and neutralizer after magnesium sinking.
Description
Technical field
The present invention relates to a kind of methods that demagging is gone in zinc abstraction system, belong to technical field of wet metallurgy.
Background technique
In Zinc Hydrometallurgy Process, the continuous circulation collection of magnesium come in by raw material entrainment, if do not adopted an effective measure, body
Content of magnesium can be continuously increased in system, can reach 40g/L or more, so that magnesium is easy in the lower pipeline of temperature or chamber wall knot
Crystalline substance improves blocking risk, potential threat is caused to zinc abstraction equipment, while high magnesium ion concentration will increase solution viscosity, in electricity
Current efficiency is reduced in solution preocess, increases energy consumption.Therefore it needs to find effective way, the magnesium being enriched in solution is cleared out of is
System, to guarantee the balance of magnesium in zinc abstraction system.
It is currently used except magnesium method has: crystallisation by cooling method, the fluoride precipitation method and open circuit neutralization precipitation method.Crystallisation by cooling
The principle of method demagging is the variation based on magnesium salts solubility, when the close saturation of content of magnesium, using pressure or Temperature fall, Mg2+
Then with MgSO4Crystallization is precipitated.But in actual operation, often there is a large amount of zinc sulfate, the salts such as calcium sulfate are precipitated simultaneously, make
Demagging effect is undesirable, while also resulting in a large amount of losses of zinc.
Fluoride is to utilize MgF except magnesium processes2The characteristics of solubility very little, adds HF, ZnF2, the fluorine-containing reagents such as NaF can remove
Remove magnesium ion in solution.Although having positive effect to demagging using the fluoride precipitation method, content of fluoride ion can be risen in solution
Height, during Zinc electrolysis, fluorine ion can destroy the pellumina of cathode plate, so that precipitation zinc is sticked together with aluminium sheet, lead to zinc
Skin is difficult to remove, and cathode aluminum plate consumption is caused to increase.
Open circuit is neutralized except magnesium method is that addition lime carries out neutralization precipitation in liquid after electrolysis, make zinc, magnesium plasma all from
It is precipitated out in solution.The method not only consumes large quantities of lime, generates many waste residues and waste water, while causing the damage of a large amount of zinc
Cost recovery of becoming estranged increases.
Summary of the invention
For deficiency existing for background technique, the present invention proposes a kind of method that demagging is gone in zinc abstraction system, does not need
Other reagents and impurity element is added, only just the zinc in solution of opening a way precipitates by zinc calcine, generating basic zinc sulfate can
To be returned directly to leach process, the loss very little of zinc is easy to operate, and reagent consumption and waste residue yield are few.
To achieve the goals above, the present invention is achieved through the following technical solutions:
The method of demagging is gone in the zinc abstraction system comprising the following specific steps
(1) fine grinding: by required zinc calcine fine grinding so that average particle size is less than 200 microns；
(2) it dilutes electrolytic liquid: liquid after magnesium sinking that magnesium sinking process generates mix with the electrolytic liquid of open circuit, dilution is electrolysed
Liquid afterwards；
(3) zinc calcine leaches magnesium in advance: the zinc calcine after step (1) fine grinding is obtained electrolytic liquid preimpregnation by step (2)
Magnesium out；
(4) recycle zinc: the solution processing recycling zinc that step (3) is obtained, reaction equation are as follows；
ZnSO4+3ZnO+8H2O=ZnSO4·3Zn(OH)2·5H2O；
(5) precipitate magnesium: liquid filtration treatment precipitates magnesium after the heavy zinc that step (4) is obtained.
Further, in the step (1) zinc calcine be furnace bottom calcining, flue dust or both after fluidized bed roasting mixing
Object.
Further, liquid mixed proportion is 1:2~8 after the magnesium sinking of the electrolytic liquid and return opened a way in the step (2).
Further, electrolytic liquid sulfuric acid content 150-160g/L, Zn content 50-60g/L, magnesium contain in the step (2)
Measure 15-40g/L.
Further, pH value of solution is 5~5.5 after leaching in advance in the step (3), and every liter of open circuit electrolytic liquid calcining is added
Amount is 0.1~3kg, and pre- Leach reaction magnesium leaching efficiency is 40~90%.
Further, heavy 20~80 DEG C of zinc reaction temperature in the step (4), in reaction time 1-3 hour, solution ph is
5.5~6.5, the amount that calcining is added in every liter of electrolytic liquid is 1~4kg, and reaction zinc deposition efficiency is greater than 90%, and liquid zinc contains after heavy zinc
Amount is lower than 3g/L, 4~7g/L of content of magnesium.
Further, in the step (5) magnesium sinking reaction end pH value be 11~12,40~50 DEG C of reaction temperature, magnesium sinking
Reaction additives are white lime or milk of lime, and added white lime calcium oxide content is not less than 85%, and additive amount is every heave
Liquid 20-60g/L after zinc.
Further, reaction magnesium precipitate efficiency is greater than 98% in the step (5), and liquid Zn content is lower than 5mg/L after magnesium sinking,
Content of magnesium is lower than 10mg/L.
Further, the filter method is filters pressing.
Further, the open circuit efficiency of magnesium is 60-90% in the step (5).
In the present invention unless otherwise stated, ratio, percentage are mass ratio.
Beneficial effects of the present invention:
The method provided through the invention, it may not be necessary to other reagents and impurity element be added, only zinc calcine is leaned on just will
Zinc in open circuit solution precipitates, and generating basic zinc sulfate can be returned directly to leach process, the loss very little of zinc, operation
Simply, reagent consumption and waste residue yield are few.
The present invention does not generate efflux wastewater, and magnesium is discharged in the form of calcium and magnesium slag, can be used as cement producting material, principle is
Leach the magnesium in zinc calcine in advance using electrolytic liquid, it is heavy that the zinc sulfate in calcining in zinc oxide and solution generates basic zinc sulfate
It forms sediment, the basic zinc sulfate of generation, which directly returns, leaches process, and magnesium stays in the solution, and calcining is made to presoak de-magging using electrolytic liquid
While so that electrolytic liquid is opened a way from system, play the role of dual demagging；Liquid adds a small amount of lime again and neutralizes after heavy zinc
Magnesium is precipitated, solution returns to preimpregnation magnesium and heavy zinc process as diluent and neutralizer after magnesium sinking.
Detailed description of the invention
Attached drawing 1 is the flow diagram that demagging is gone in zinc solution provided by the invention.
Specific embodiment
Below in conjunction with the embodiment of the present invention and attached drawing, technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, is based on
Embodiment in the present invention, it is obtained all other without creative efforts that this field compares technical staff
Embodiment shall fall within the protection scope of the present invention.
Embodiment 1
Zinc calcine preimpregnation magnesium test: the electrolytic liquid for taking 1L zinc electrolysis to generate, wherein 60g/L containing zinc, magnesium 23.3g/L, sulphur
Sour 160g/L；Liquid 3L, liquid 1mg/L containing zinc, magnesium 10mg/L after magnesium sinking after the magnesium sinking that magnesium sinking process generates is added.Mixed liquor is placed in
In 2L beaker, in water-bath adjusting beaker, solution temperature is to 60 DEG C, using mechanical stirring mode.It is 22 μm that average particle size, which is added,
Furnace bottom zinc calcine 250g, calcining content of magnesium is 0.42%, and after reaction 30 minutes, filtering, drying obtains dry slag 69g.Such as table 1
Shown, Zn content in solution is 38.1g/L, content of magnesium 6.07g/L, content of magnesium 0.11% in dry slag.Test result shows
Calcining additive amount 250g/L electrolytic liquid, under the conditions of 60 DEG C of reaction temperature, 92.77% magnesium is reduced by sulfuric acid leaching in calcining
Enter the magnesium of zinc abstraction system.
1 zinc calcine of table leaches magnesium test data in advance
Embodiment 2
Zinc calcine preimpregnation magnesium test: the electrolytic liquid for taking 1L zinc electrolysis to generate, wherein 60g/L containing zinc, magnesium 23.3g/L, sulphur
Sour 160g/L；Liquid 3L, liquid 1mg/L containing zinc, magnesium 10mg/L after magnesium sinking after the magnesium sinking that magnesium sinking process generates is added.Mixed liquor is placed in
In 2L beaker, in water-bath adjusting beaker, solution temperature is to 60 DEG C, using mechanical stirring mode.It is 22 μm that average particle size, which is added,
Furnace bottom zinc calcine 500g, calcining content of magnesium is 0.42%, and after reaction 30 minutes, filtering, drying obtains dry slag 315g.Such as table
Shown in 2, Zn content after reaction in solution is 40.3g/L, content of magnesium 6.02g/L, content of magnesium 0.18% in dry slag.Test result
Show under the conditions of calcining additive amount 500g/L electrolytic liquid, 60 DEG C of reaction temperature, 73% magnesium is presoaked by sulfuric acid in calcining
Out, the magnesium into zinc abstraction system is reduced.
2 zinc calcine of table leaches magnesium test data in advance
Embodiment 3
Heavy zinc test: the electrolytic liquid for taking 100ml zinc electrolysis to generate, wherein 60g/L containing zinc, magnesium 23.3g/L, sulfuric acid
160g/L；Liquid 300ml, liquid 1mg/L containing zinc, magnesium 10mg/L after magnesium sinking after the magnesium sinking that magnesium sinking process generates is added.Mixed liquor is set
In 1L beaker, in water-bath adjusting beaker, solution temperature is to 60 DEG C, using mechanical stirring mode.Test parameters and result are such as
Shown in table 3, the zinc calcine 15.2g that average particle size is 8 μm is added, titration detection Zn content is 35.6g/L, continues to add calcining
156g is stirred 1 hour, sampling analysis, and solution Zn content is 23.3g/L, and continuing addition calcining reaches total calcining additional amount
200g is stirred 1 hour, sampling analysis, and solution Zn content is 15.4g/L, and continuing addition zinc calcine makes total addition level 230g, is stirred
It mixes 1 hour, sampling analysis, the Zn content in solution is 0.66g/L.Content of magnesium is 5.93g/L in reaction end solution.Test knot
Fruit shows that under the conditions of calcining additive amount 2.3kg/L electrolytic liquid, reaction time 3h, 60 DEG C of reaction temperature, zinc can be with 8 μm
Zinc calcine generates basic zinc sulfate precipitating, and as zinc calcine additive amount is continuously increased, Zn content is continued to decline, and zinc rate of deposition is
95.6%.
3 zinc recovering test data of table
Embodiment 4
Heavy zinc test: the electrolytic liquid for taking 100ml zinc electrolysis to generate, wherein 60g/L containing zinc, magnesium 23.3g/L, sulfuric acid
160g/L；Liquid 300ml, liquid 1mg/L containing zinc, magnesium 10mg/L after magnesium sinking after the magnesium sinking that magnesium sinking process generates is added.Mixed liquor is set
In 1L beaker, in water-bath adjusting beaker, solution temperature is to 60 DEG C, using mechanical stirring mode.Test parameters and result are such as
Shown in table 4, the zinc calcine 16.5g that average particle size is 22 μm is added, detection Zn content is 36.3g/L, continues to add calcining 156g,
Stirring 1 hour, sampling analysis, solution Zn content are 19.6g/L, and continuing addition calcining makes total calcining additional amount reach 200g, are stirred
It mixes 1 hour, sampling analysis, solution Zn content is 8.7g/L, and continuing addition zinc calcine makes total addition level 230g, it stirs 1 hour,
Sampling analysis, the Zn content in solution are 1.21g/L.Test result shows in calcining additive amount 2.3kg/L- electrolytic liquid, instead
3h between seasonable, under the conditions of 60 DEG C of reaction temperature, zinc can equally generate basic zinc sulfates precipitating with 22 μm of zinc calcines, as zinc roasts
Sand additive amount is continuously increased, and Zn content continues to decline, and reaction end zinc rate of deposition is 91.9%.
4 zinc recovering test data of table
Embodiment 5
Heavy zinc test: the electrolytic liquid for taking 10L zinc electrolysis to generate, wherein 60g/L containing zinc, magnesium 23.3g/L, sulfuric acid 160g/
L；Liquid 30L, liquid 1mg/L containing zinc, magnesium 10mg/L after magnesium sinking after the magnesium sinking that magnesium sinking process generates is added.It is anti-that mixed liquor is placed in 100L
It answers in kettle, with Electric heating control solution temperature at 50 DEG C, using mechanical stirring mode.Test parameters and result such as 5 institute of table
Show, the primary zinc calcine 26kg that average particle size is added and is 22 μm is reacting after forty minutes, sampling analysis, the Zn content in solution
For 12.7g/L.At total reaction time 60 minutes, sampling analysis, the Zn content in solution was 9.6g/L.Divide in total reaction time 80
Clock, sampling analysis, the Zn content in solution are 7.2g/L.At total reaction time 100 minutes, sampling analysis, the zinc in solution contained
Amount is 3.5g/L.At total reaction time 150 minutes, sampling analysis, the Zn content in solution was 2.5g/L.Test result shows
Under the conditions of calcining additive amount 2.6kg/L- electrolytic liquid, 50 DEG C of reaction temperature, with the progress in reaction time, Zn content by
Gradually decline, Zn content is 2.5g/L after reaction 2.5 hours, and reaction end zinc rate of deposition is 83.3%.
5 zinc recovering test data of table
Embodiment 6
Heavy zinc test: 1m is taken3The electrolytic liquid that zinc electrolysis generates, wherein 60g/L containing zinc, magnesium 23.3g/L, sulfuric acid 160g/
L；Liquid 3m after the magnesium sinking that addition magnesium sinking process generates3, liquid 1mg/L containing zinc, magnesium 10mg/L after magnesium sinking.Mixed liquor is placed in reaction kettle
In, with electric heating heating method control solution temperature at 60 DEG C, using mechanical stirring mode.Test parameters and result such as 6 institute of table
Show, the primary zinc calcine 2.6t that average particle size is added and is 22 μm is reacting after forty minutes, sampling analysis, the Zn content in solution
For 10.4g/L.At total reaction time 60 minutes, sampling analysis, the Zn content in solution was 8.0g/L.Divide in total reaction time 80
Clock, sampling analysis, the Zn content in solution are 6.2g/L.At total reaction time 100 minutes, sampling analysis, the zinc in solution contained
Amount is 3.6g/L.At total reaction time 150 minutes, sampling analysis, the Zn content in solution was 1.04g/L.Test result shows
Under the conditions of calcining additive amount 2.6kg/L electrolytic liquid, 60 DEG C of reaction temperature, with the progress in reaction time, Zn content by
Gradually decline, Zn content has been about 1g/L after reaction 2.5 hours, and reaction end zinc rate of deposition is 93.1%.
6 zinc recovering test data of table
Embodiment 7
Magnesium sinking test: 1L is taken to sink after zinc liquid as magnesium sinking test raw material, wherein content of magnesium 6.24g/L, Zn content 1.34g/
L.With white lime come magnesium in precipitation solution and zinc, wherein calcium oxide content 87% in white lime.Liquid after heavy zinc is placed in 2L beaker
In, 45 DEG C of solution temperature are adjusted with water-bath, using mechanical stirring mode.It is added at one time lime 39g, lime is added ratio and is
The reaction time 2 hours, calcium and magnesium slag 112g, filtrate 940ml was obtained by filtration in 39g/L solution, solution ph 11.Test result such as table 7
Shown, in lime adding amount 39g/L, temperature 45 C, under the conditions of reaction time 2h, content of magnesium is dropped to from 6.24g/L in solution
0.01g/L.Zn content also drops to 0.001g/L from 1.34g/L in solution.In reaction, magnesium precipitate efficiency is 99.8%.
Table 7 precipitates magnesium test data
Embodiment 8
Magnesium sinking test: 10L is taken to sink after zinc liquid as magnesium sinking test raw material, wherein content of magnesium 6.33g/L, Zn content 1.87g/
L.With white lime come magnesium in precipitation solution and zinc, wherein calcium oxide content 87% in white lime.It is anti-that liquid after heavy zinc is placed in 100L
It answers in kettle, with Electric heating control solution temperature at 45 DEG C, using mechanical stirring mode.It is added at one time lime 350g, stone
It is 35g/L solution that ratio, which is added, in ash, and the reaction time 2.5 hours, calcium and magnesium slag 1050g, filtrate 9.25L was obtained by filtration in solution ph 11.
Test result is as shown in table 8, in lime adding amount 35g/L, temperature 45 C, and under the conditions of reaction time 2.5h, content of magnesium in solution
0.035g/L is dropped to from 6.33g/L.Zn content also drops to 0.001g/L from 1.87g/L in solution.In reaction, magnesium precipitate efficiency
It is 99.4%.
Table 8 precipitates magnesium test data
Embodiment 9
Preimpregnation magnesium, heavy zinc, magnesium sinking long run test: in industrial reaction slot, 87.88m is taken3After the electrolysis that zinc electrolysis generates
Liquid, wherein 60g/L containing zinc, magnesium 23.3g/L, sulfuric acid 160g/L；Liquid 263.6m after the magnesium sinking that addition magnesium sinking process generates3, magnesium sinking
Liquid 1mg/L containing zinc afterwards, magnesium 10mg/L.Solution is heated to 60 DEG C with steam heating method, using mechanical stirring mode.It is primary to add
Enter the zinc calcine 202.1t that average particle size is 22 μm, calcining is added than being 2.3kg/L electrolytic liquid.After reaction 2.5 hours, adopt
It is filtered with filter press, obtains 271.1t basic zinc sulfate slag and 281.2m3Filtrate (liquid after heavy zinc).Cadmia moisture content
20%, contain magnesium 0.23%.Test result is as shown in table 9, and the pre- leaching rate for being computed magnesium in calcining is 41.2%.After heavy zinc in liquid
Zn content is 1.82g/L, calculates zinc recovery with zinc content in filtrate as 90.3%.With gained amount of filtrate and initial soln amount
It is 80% that radiometer, which calculates magnesium open circuit efficiency,.In production, in order to reduce liquid treating capacity before subsequent magnesium sinking, it is not recommended that use wash water
Basic zinc sulfate precipitating is washed, but by the means of filters pressing, more filtrates are obtained, to improve Mg open circuit efficiency.
Take 281m3Liquid is as magnesium sinking test raw material after heavy zinc, wherein content of magnesium 6.94g/L, Zn content 1.82g/L.Once
Property be added milk of lime 26.34t, aqueous 63%, control solution temperature at 45 DEG C, the reaction time 2 hours, reaction end solution ph
11, wet calcium and magnesium slag 31.49t, filtrate 290.6m are obtained after filtering3.Test result shows in temperature 45 C, reaction time 2h item
Under part, content of magnesium drops to 0.021g/L from 6.94g/L in solution.Zn content also drops to 0.001g/L from 1.82g/L in solution.
In reaction, magnesium precipitate efficiency is 99.7%.
Table 9 presoaks magnesium, heavy zinc, magnesium sinking long run test
Can be seen that from embodiment 1-9 and table 1-9, removed in a kind of zinc abstraction system provided by the invention not method, lead to
Cross method provided by the invention, it may not be necessary to other reagents and impurity element be added, in the solution that only will just open a way by zinc calcine
Zinc precipitate, generate basic zinc sulfate can be returned directly to leach process, the loss very little of zinc, easy to operate, reagent
Consumption and waste residue yield are few.
Finally, it is stated that preferred embodiment above is only used to illustrate the technical scheme of the present invention and not to limit it, although logical
It crosses above preferred embodiment the present invention is described in detail, however, those skilled in the art should understand that, can be
Various changes are made to it in form and in details, without departing from claims of the present invention limited range.
Claims (9)
1. a kind of method of magnesium sinking in zinc abstraction system, it is characterised in that: the method for magnesium sinking includes in the zinc abstraction system
Step in detail below:
(1) fine grinding: by required zinc calcine fine grinding, so that average particle size is less than 200 microns；
(2) electrolytic liquid is diluted: the ratio by liquid after the electrolytic liquid of open circuit and the magnesium sinking of magnesium sinking process generation according to 1:2~8
Mixing dilutes electrolytic liquid；
(3) zinc calcine leaches magnesium in advance: the zinc calcine after step (1) fine grinding being obtained electrolytic liquid by step (2) and leaches magnesium in advance；
(4) recycle zinc: the solution processing recycling zinc that step (3) is obtained, reaction equation are as follows；
ZnSO4+3ZnO+8H2O=ZnSO4·3Zn(OH)2·5H2O；
(5) precipitate magnesium: white lime is added in liquid after the heavy zinc that step (4) is obtained or milk of lime filtration treatment precipitates magnesium, and magnesium sinking is anti-
Answer endpoint pH be 11~12,40~50 DEG C of reaction temperature.
2. the method for magnesium sinking in a kind of zinc abstraction system according to claim 1, it is characterised in that: the step (1)
Middle zinc calcine is the mixture of furnace bottom calcining after fluidized bed roasting, flue dust or both.
3. the method for magnesium sinking in a kind of zinc abstraction system according to claim 1, it is characterised in that: the step (2)
Middle electrolytic liquid sulfuric acid content 150-160g/L, Zn content 50-60g/L, content of magnesium 15-40g/L.
4. the method for magnesium sinking in a kind of zinc abstraction system according to claim 1, it is characterised in that: the step (3)
In leach in advance after pH value of solution be 5~5.5, every liter of open circuit electrolytic liquid calcining additional amount is 0.1~3kg, and pre- Leach reaction magnesium soaks
Efficiency is 40~90% out.
5. the method for magnesium sinking in a kind of zinc abstraction system according to claim 1, it is characterised in that: the step (4)
In sink 20~80 DEG C of zinc reaction temperature, in reaction time 1-3 hour, solution ph is 5.5~6.5, and every liter of electrolytic liquid, which is added, to be roasted
The amount of sand is 1~4kg, and reaction zinc deposition efficiency is greater than 90%, and liquid Zn content is lower than 3g/L, 4~7g/L of content of magnesium after heavy zinc.
6. the method for magnesium sinking in a kind of zinc abstraction system according to claim 1, it is characterised in that: the step (5)
Middle magnesium sinking reacts added white lime calcium oxide content and is not less than 85%, and additive amount is liquid 20-60g/L after every heave zinc.
7. the method for magnesium sinking in a kind of zinc abstraction system according to claim 1, it is characterised in that: the step (5)
Middle reaction magnesium precipitate efficiency is greater than 98%, and liquid Zn content is lower than 5mg/L after magnesium sinking, and content of magnesium is lower than 10mg/L.
8. the method for magnesium sinking in a kind of zinc abstraction system according to claim 1, it is characterised in that: the filter method is
Filters pressing.
9. the method for magnesium sinking in a kind of zinc abstraction system according to claim 1, it is characterised in that: in the step (5)
The open circuit efficiency of magnesium is 60-90%.
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| CN107904414A (en) * | 2017-11-21 | 2018-04-13 | 四环锌锗科技股份有限公司 | A kind of method that magnesium is arranged in solution of zinc sulfate |
| CN108624755A (en) * | 2018-06-11 | 2018-10-09 | 云南驰宏资源综合利用有限公司 | A kind of method of impurity Mg, Cl open circuits in zinc hydrometallurgy system |
| CN108796242A (en) * | 2018-06-20 | 2018-11-13 | 云南驰宏资源综合利用有限公司 | A kind of method of zinc gray recycling |
| CN109867463B (en) * | 2019-03-04 | 2021-12-03 | 西南科技大学 | Method for resource utilization of magnesium in zinc hydrometallurgy process |
| CN110735048A (en) * | 2019-11-21 | 2020-01-31 | 株洲冶炼集团股份有限公司 | Method for removing magnesium and fluorine from zinc-containing solution of wet-method zinc smelting |
| CN111485119A (en) * | 2020-03-18 | 2020-08-04 | 云南云铜锌业股份有限公司 | Method and device for treating new wet-process zinc smelting liquid |
| CN112301381B (en) * | 2020-10-16 | 2023-06-09 | 云南驰宏锌锗股份有限公司 | Method for removing magnesium ions from zinc electrolyte |
| CN113355517B (en) * | 2021-05-31 | 2022-07-26 | 云南罗平锌电股份有限公司 | Method for harmlessly treating and recycling magnesium fluoride waste acid in zinc smelting process |
| CN114480842A (en) * | 2021-12-30 | 2022-05-13 | 深圳市中金岭南有色金属股份有限公司丹霞冶炼厂 | Method and device for removing magnesium from zinc smelting zinc sulfate solution |
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