CN108642280A - A method of improving comprehensive recovery system zinc recovery - Google Patents
A method of improving comprehensive recovery system zinc recovery Download PDFInfo
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- CN108642280A CN108642280A CN201810780155.XA CN201810780155A CN108642280A CN 108642280 A CN108642280 A CN 108642280A CN 201810780155 A CN201810780155 A CN 201810780155A CN 108642280 A CN108642280 A CN 108642280A
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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
- C22B3/04—Extraction of metal compounds from ores or concentrates by wet processes by leaching
- C22B3/06—Extraction of metal compounds from ores or concentrates by wet processes by leaching in inorganic acid solutions, e.g. with acids generated in situ; in inorganic salt solutions other than ammonium salt solutions
- C22B3/08—Sulfuric acid, other sulfurated acids or salts thereof
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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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- 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
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Abstract
The invention belongs to zinc abstraction recovery technology fields, provide a kind of method improving comprehensive recovery system zinc recovery.This approach includes the following steps：(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration is less than 1%, and pH value control is 1.5 2.0, and liquid-solid ratio is 8 10：1, extraction temperature is 60 70 DEG C, extraction time 1.5h, and leaching acidity is 1 2g/L；(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：5‑7：1,80 90 DEG C, extraction time 3h of extraction temperature leaches 50 60g/L of terminal acidity.This method design science can improve the leaching of zinc and reduce because filtration difficulty leads to water zinc content in slag, to increase the zinc recovery of entire comprehensive recovery system.
Description
Technical field
The invention belongs to zinc abstraction recovery technology fields, specifically, being related to a kind of raising comprehensive recovery system zinc recovering
The method of rate.
Background technology
Zn content is also very high inside the waste residue that zinc abstraction comprehensive recovery system generates, generally 12-15%.To zinc oxide
For mine, it is primarily referred to as ZnO, and Containing Sulfur zinc ZnS, ore of zinc silicate Zn2SiO4With smithsonite Zn4(Si2O7)(OH).H2O.It is this kind of
When mine makees wet-treating, difficulty caused by a large amount of silica gel is often generated when acidleach to clarification, filtering forms a large amount of water and contains zinc,
Influence the rate of recovery of zinc.
To obtain the ore pulp for being easy to filtering, by long-term research, unremitting effort, it has been found that silicon deposits in ore pulp
It is influenced by following factor：(1) concentration：Under certain temperature and pH value condition, SiO in Ludox2Then gelling is fast greatly for concentration,
The small then gelling of concentration is slow, experiments have shown that concentration is then not easy to be gelled when being less than 0.74-0.98%；(2) temperature：Shadow of the temperature to gelling
Sound is related with the pH value of silica gel solution, increases the increase of temperature gelation rate in an acidic solution, situation is just in alkaline solution
Reduce instead on the contrary, increasing temperature gelation rate；(3) pH value：PH value influences maximum to the gelation rate of Ludox, when solution connects
Gelation rate is maximum when weakly acidic pH；Then gelation rate is smaller in acid or alkaline solution.
However, in the prior art, there is the method that can actually reduce silica gel generation to improve zinc recovery.
Invention content
For deficiency above-mentioned in the prior art, the object of the present invention is to provide a kind of raising comprehensive recovery system zinc
The method of the rate of recovery；This method design science can improve the leaching of zinc and reduce because filtration difficulty causes water in slag to contain zinc
Amount, to increase the zinc recovery of entire comprehensive recovery system.
In order to achieve the above object, the solution that the present invention uses is：
A method of comprehensive recovery system zinc recovery is improved, is included the following steps：(1) low leaching：By zinc oxide ore into
Low immersion liquid and low phase analysis are obtained after the low leaching of row；Low leaching condition：Control SiO2Concentration is less than 1%, and pH value control is 1.5-2.0, liquid
Gu than being 8-10：1, extraction temperature is 60-70 DEG C, extraction time 1.5h, and leaching acidity is 1-2g/L；(2) high leaching：By low leaching
Slag obtains high immersion liquid and high acid leach residue after carrying out high leaching；High leaching condition：Liquid-solid ratio：5-7：1,80-90 DEG C of extraction temperature, extraction time
3h leaches terminal acidity 50-60g/L.
A kind of advantageous effect of method improving comprehensive recovery system zinc recovery provided by the invention is：
The method that this kind provided by the invention improves comprehensive recovery system zinc recovery includes：
(1) by adjusting the solid-to-liquid ratio, temperature, pH of low leaching, extraction time and SiO in low leaching step2The tune of concentration
Control, to prevent colloid SiO2Generation, prevent silicic acid influence zinc the rate of recovery, to improve the rate of recovery of zinc；
(2) the present invention provides a kind of new technological processes, by the coordinated between each step to improve the leaching of zinc
Go out and reduces because filtration difficulty leads to raising of the water containing zinc in slag, to increase the zinc recovery of entire comprehensive recovery system.
Specific implementation mode
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, builds according to normal condition or manufacturer
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
Below to it is provided in an embodiment of the present invention it is a kind of improve comprehensive recovery system zinc recovery method carry out specifically
It is bright.
A method of comprehensive recovery system zinc recovery is improved, is included the following steps：(1) low leaching；(2) high leaching.It needs
It is noted that further including being cured to zinc oxide ore before (1) low leaching in the present embodiment.
In the present embodiment, curing includes：By oxide powder and zinc and electrolysis waste solution 4-6 in mass ratio：1 carries out batch mixing, into one
Step ground is 5 according to mass ratio：1 batch mixing keeps 8-12h；Water is added then according to the 20% of oxide powder and zinc quality, carries out water logging
Zinc oxide ore is obtained by filtration in 10-12h.It should be noted that in the present embodiment, electrolysis waste solution includes：A concentration of 150-200g/L
H2SO4。
Inventor creatively has found, compared with conventional acidleach, electrolysis waste solution curing is added before acidleach so that iron is aoxidized
Object is reacted with sulfuric acid system to be generated the crystal such as siderotil and obtains higher iron removal efficiency.Iron is entered in the form of soluble sulphate
Liquid phase and detach, to destroy its package to zinc, germanium, the leaching rate of zinc is greatly improved, to increase the rate of recovery of zinc.Using
In the maturing process of above-mentioned aging way, ore pulp can cure rapidly, and porous solid is formed under above-mentioned technical conditions.After curing
Zinc oxide ore presentation be it is granular, be no longer presented glue, strainability is preferable.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
Less than 1%, pH value control is 1.5-2.0, liquid-solid ratio 8-10：1, extraction temperature is 60-70 DEG C, extraction time 1.5h, leaching
It is 1-2g/L to go out acidity.
Zinc oxide ore does not control SiO when leaching2Dissolving, but by trying to control ore pulp to the improvement of technological parameter in low leaching
The polymerization of middle silicic acid, makes silicic acid be removed before gelling, improves the performance of pulp liquid-solid isolation.
Inventor creatively has found that silicic acid is most stable near isoelectric pH=2 of silicic acid, and rate of polymerization is minimum；When
pH>2 and pH<The rate of silicic acid polymerization will increase when 1, and increase with the rate of polymerization that is raised and lowered of pH value, until generating body
Huge, loose network structure the hydrogel of product.When using pH value control as 1.5-2.0, not only the rate of silicic acid polymerization is minimum, increases
Add leaching rate, and meets the heavy germanium Optimal pH of back segment tannin.
Inventor also creatively has found, can be avoided when to keep extraction temperature be 60-70 DEG C caused by temperature is excessively high
Filter difficulty causes to reduce leaching rate.
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：5-7：1, leaching
Go out 80-90 DEG C of temperature, extraction time 3h leaches terminal acidity 50-60g/L.
The feature and performance of the present invention are described in further detail with reference to embodiments.
A kind of method improving comprehensive recovery system zinc recovery is present embodiments provided, is included the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 150-200g/L2SO44-6 in mass ratio：1 carries out batch mixing, keeps 8-
12h；Water is added then according to the 20% of oxide powder and zinc quality, carries out water logging 10-12h, zinc oxide ore is obtained by filtration.(1) low leaching：
Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration is less than 1%, pH value control
For 1.5-2.0, liquid-solid ratio 8-10：1, extraction temperature is 60-70 DEG C, extraction time 1.5h, and leaching acidity is 1-2g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：5-7：1, leaching
Go out 80-90 DEG C of temperature, extraction time 3h leaches terminal acidity 50-60g/L.
Embodiment 1
A kind of method improving comprehensive recovery system zinc recovery is present embodiments provided, is included the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 150g/L2SO4In mass ratio 4：1 carries out batch mixing, keeps 8h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 10h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
Less than 1%, pH value control is 1.8, liquid-solid ratio 9：1, extraction temperature is 65 DEG C, extraction time 1.5h, leaches acidity and is
1.5g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：6：1, it leaches
85 DEG C, extraction time 3h of temperature leaches terminal acidity 55g/L.
Embodiment 2
A kind of method improving comprehensive recovery system zinc recovery is present embodiments provided, is included the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 200g/L2SO4In mass ratio 6：1 carries out batch mixing, keeps 12h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 12h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
Less than 1%, pH value control is 1.8, liquid-solid ratio 9：1, extraction temperature is 65 DEG C, extraction time 1.5h, leaches acidity and is
1.5g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：6：1, it leaches
85 DEG C, extraction time 3h of temperature leaches terminal acidity 55g/L.
Embodiment 3
A kind of method improving comprehensive recovery system zinc recovery is present embodiments provided, is included the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 180g/L2SO4In mass ratio 5：1 carries out batch mixing, keeps 10h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 11h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
Less than 1%, pH value control is 1.8, liquid-solid ratio 9：1, extraction temperature is 65 DEG C, extraction time 1.5h, leaches acidity and is
1.5g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：6：1, it leaches
85 DEG C, extraction time 3h of temperature leaches terminal acidity 55g/L.
Embodiment 4
A kind of method improving comprehensive recovery system zinc recovery is present embodiments provided, is included the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 180g/L2SO4In mass ratio 5：1 carries out batch mixing, keeps 10h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 11h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
Less than 1%, pH value control is 1.5, liquid-solid ratio 8：1, extraction temperature is 60 DEG C, extraction time 1.5h, and leaching acidity is 1g/
L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：6：1, it leaches
85 DEG C, extraction time 3h of temperature leaches terminal acidity 55g/L.
Embodiment 5
A kind of method improving comprehensive recovery system zinc recovery is present embodiments provided, is included the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 180g/L2SO4In mass ratio 5：1 carries out batch mixing, keeps 10h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 11h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
Less than 1%, pH value control is 2.0, liquid-solid ratio 10：1, extraction temperature is 70 DEG C, extraction time 1.5h, leaches acidity and is
2g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：6：1, it leaches
85 DEG C, extraction time 3h of temperature leaches terminal acidity 55g/L.
Embodiment 6
A kind of method improving comprehensive recovery system zinc recovery is present embodiments provided, is included the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 180g/L2SO4In mass ratio 5：1 carries out batch mixing, keeps 10h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 11h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
Less than 1%, pH value control is 2.0, liquid-solid ratio 10：1, extraction temperature is 70 DEG C, extraction time 1.5h, leaches acidity and is
2g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：5：1, it leaches
80 DEG C, extraction time 3h of temperature leaches terminal acidity 50g/L.
Embodiment 7
A kind of method improving comprehensive recovery system zinc recovery is present embodiments provided, is included the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 180g/L2SO4In mass ratio 5：1 carries out batch mixing, keeps 10h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 11h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
Less than 1%, pH value control is 2.0, liquid-solid ratio 10：1, extraction temperature is 70 DEG C, extraction time 1.5h, leaches acidity and is
2g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：7：1, it leaches
90 DEG C, extraction time 3h of temperature leaches terminal acidity 60g/L.
Comparative example 1
This comparative example provides a kind of method improving comprehensive recovery system zinc recovery, includes the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 140g/L2SO4In mass ratio 3：1 carries out batch mixing, keeps 6h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 9h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
Less than 1%, pH value control is 1.8, liquid-solid ratio 9：1, extraction temperature is 65 DEG C, extraction time 1.5h, leaches acidity and is
1.5g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：6：1, it leaches
85 DEG C, extraction time 3h of temperature leaches terminal acidity 55g/L.
Comparative example 2
This comparative example provides a kind of method improving comprehensive recovery system zinc recovery, includes the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 210g/L2SO4In mass ratio 7：1 carries out batch mixing, keeps 13h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 13h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
Less than 1%, pH value control is 1.8, liquid-solid ratio 9：1, extraction temperature is 65 DEG C, extraction time 1.5h, leaches acidity and is
1.5g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：6：1, it leaches
85 DEG C, extraction time 3h of temperature leaches terminal acidity 55g/L.
Comparative example 3
This comparative example provides a kind of method improving comprehensive recovery system zinc recovery, includes the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 150g/L2SO4In mass ratio 4：1 carries out batch mixing, keeps 8h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 10h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
More than 1%, pH value control is 1.4, liquid-solid ratio 7：1, extraction temperature is 55 DEG C, extraction time 1.5h, leaches acidity and is
0.8g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：6：1, it leaches
85 DEG C, extraction time 3h of temperature leaches terminal acidity 55g/L.
Comparative example 4
This comparative example provides a kind of method improving comprehensive recovery system zinc recovery, includes the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 150g/L2SO4In mass ratio 4：1 carries out batch mixing, keeps 8h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 10h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
More than 1%, pH value control is 2.1, liquid-solid ratio 11：1, extraction temperature is 75 DEG C, extraction time 1.5h, leaches acidity and is
2.2g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：6：1, it leaches
85 DEG C, extraction time 3h of temperature leaches terminal acidity 55g/L.
Comparative example 5
This comparative example provides a kind of method improving comprehensive recovery system zinc recovery, includes the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 150g/L2SO4In mass ratio 4：1 carries out batch mixing, keeps 8h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 10h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
Less than 1%, pH value control is 1.8, liquid-solid ratio 9：1, extraction temperature is 65 DEG C, extraction time 1.5h, leaches acidity and is
1.5g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：4：1, it leaches
75 DEG C, extraction time 3h of temperature leaches terminal acidity 45g/L.
Comparative example 6
This comparative example provides a kind of method improving comprehensive recovery system zinc recovery, includes the following steps：
Curing：By the H of oxide powder and zinc and a concentration of 150g/L2SO4In mass ratio 4：1 carries out batch mixing, keeps 8h；Then it presses
Water is added according to the 20% of oxide powder and zinc quality, carries out water logging 10h, zinc oxide ore is obtained by filtration.
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration
Less than 1%, pH value control is 1.8, liquid-solid ratio 9：1, extraction temperature is 65 DEG C, extraction time 1.5h, leaches acidity and is
1.5g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：8：1, it leaches
95 DEG C, extraction time 3h of temperature leaches terminal acidity 65g/L.
Experimental example 1
Experimental method：Embodiment 1-7 and comparative example 1-6 are set to experimental group 1-13, by the prior art (oxide powder and zinc-
Low leaching-height leaching) it is set as experimental group 14, the amount of zinc is denoted as M1 in the oxide powder and zinc before test experience group 1-14 processing respectively, with
And the Zn content in high acid leach residue is denoted as M2, calculates rate of recovery V (%)=M2/M1 of zinc, the results are shown in Table 1：
Table 1
| Group number | V (%) | Group number | V (%) |
| 1 | 89 | 8 | 84 |
| 2 | 89 | 9 | 85 |
| 3 | 90 | 10 | 85 |
| 4 | 89 | 11 | 84 |
| 5 | 88 | 12 | 85 |
| 6 | 87 | 13 | 85 |
| 7 | 87 | 14 | 82 |
From the data in table 1, it can be seen that compared with the prior art, using raising comprehensive recovery system zinc provided in an embodiment of the present invention
The rate of recovery for the zinc that the method for the rate of recovery obtains improves 5-8%；Compared to comparative example 1-2, carried using what embodiment 1-7 was provided
The zinc recovery higher that the method for high comprehensive recovery system zinc recovery obtains；Involved by the maturation stage that comparative example 1-2 is provided
Each process parameters range not in range provided in an embodiment of the present invention, should the result shows that, carried using the embodiment of the present invention
Each technological parameter (mass ratio of the concentration range of electrolyte, oxide powder and zinc and electrolyte, batch mixing involved by the maturation stage of confession
Time, amount of water and water logging amount) between can coordinated synergy, so that the rate of recovery of zinc is improved；Comparative example 3-4 is provided low
Soak each process parameters range involved by step not in range provided in an embodiment of the present invention, should the result shows that, using this
Each technological parameter (SiO involved by low leaching step that inventive embodiments provide2Concentration, pH value, liquid-solid ratio, extraction temperature leach
Time and leach acidity) between can coordinated synergy, so that the rate of recovery of zinc is improved；The high leaching step that comparative example 5-6 is provided
Rapid involved each process parameters range not in range provided in an embodiment of the present invention, should the result shows that, using the present invention
Each technological parameter (liquid-solid ratio, extraction temperature, extraction time and leaching terminal acid involved by the low leaching step that embodiment provides
Degree) between can coordinated synergy, so that the rate of recovery of zinc is improved.
In conclusion using the method provided by the invention for improving comprehensive recovery system zinc recovery；This method design department
It learns, the leaching of zinc can be improved and reduces because filtration difficulty leads to water zinc content in slag, to increase entire synthetical recovery system
The zinc recovery of system.
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, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of method improving comprehensive recovery system zinc recovery, it is characterised in that：Include the following steps：
(1) low leaching：Low immersion liquid and low phase analysis are obtained after zinc oxide ore is carried out low leaching；Low leaching condition：Control SiO2Concentration is less than
1%, pH value control is 1.5-2.0, liquid-solid ratio 8-10：1, extraction temperature is 60-70 DEG C, extraction time 1.5h, leaches acid
Degree is 1-2g/L；
(2) high leaching：High immersion liquid and high acid leach residue are obtained after the low phase analysis is carried out high leaching；High leaching condition：Liquid-solid ratio：5-7：1, leaching
Go out 80-90 DEG C of temperature, extraction time 3h leaches terminal acidity 50-60g/L.
2. the method according to claim 1 for improving comprehensive recovery system zinc recovery, it is characterised in that：In step (1)
Before, further include being cured to the zinc oxide ore.
3. the method according to claim 2 for improving comprehensive recovery system zinc recovery, it is characterised in that：Curing includes：
By oxide powder and zinc and electrolysis waste solution 4-6 in mass ratio：1 carries out batch mixing, keeps 8-12h；Then according to the oxide powder and zinc quality
20% be added water, carry out water logging 10-12h, the zinc oxide ore is obtained by filtration.
4. the method according to claim 3 for improving comprehensive recovery system zinc recovery, it is characterised in that：The electrolysis is useless
Liquid includes：The H of a concentration of 150-200g/L2SO4。
5. the method according to claim 4 for improving comprehensive recovery system zinc recovery, it is characterised in that：The zinc oxide
Powder is with the electrolysis waste solution according to mass ratio 5：1 carries out batch mixing.
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