CN108929954A - Method for efficiently recovering zinc from zinc leaching residues - Google Patents
Method for efficiently recovering zinc from zinc leaching residues Download PDFInfo
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- CN108929954A CN108929954A CN201810550282.0A CN201810550282A CN108929954A CN 108929954 A CN108929954 A CN 108929954A CN 201810550282 A CN201810550282 A CN 201810550282A CN 108929954 A CN108929954 A CN 108929954A
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- Prior art keywords
- zinc
- leaching residue
- zinc leaching
- leaching
- efficiente callback
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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
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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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting processes
- C22B1/06—Sulfating roasting
-
- 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
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a method for efficiently recovering zinc from zinc leaching residues, belongs to the field of zinc hydrometallurgy, and solves the problem of low zinc leaching rate in the conventional sulfating roasting-water leaching process. The technical scheme of the invention is as follows: uniformly mixing the zinc leaching residue and sulfuric acid, and roasting the mixture in an atmosphere furnace at normal pressure after mixing; after roasting, taking out the roasted product, cooling and grinding; placing the ground calcine into a container filled with tap water at normal temperature and normal pressure, then placing the container into a parallel magnetic field with the magnetic induction intensity of 0.5-3T, and stirring and leaching, wherein the stirring direction is required to enable positive ions to generate upward Lorentz force; and after leaching, carrying out solid-liquid separation. The invention has the beneficial effects that: the magnetic field changes the structure of water molecules, reduces the viscosity of the solution, dissolves the trivalent iron hydrolysate in the calcine and releases the wrapped zinc; the magnetic field improves the zinc leaching rate and shortens the zinc leaching time.
Description
Technical field
The invention belongs to zinc hydrometallurgy fields, and in particular to a method of the high efficiente callback zinc from zinc leaching residue.
Background technique
The production of zinc generally uses traditional hydrometallurgical processes, i.e., using zinc sulfide ore and zinc oxide ore as raw material, uses
Roasting-leaching-purification-electrodeposition process recycles zinc.And in Zinc Hydrometallurgy Process, every annual meeting generates a large amount of zinc leaching residues.At present
In addition to a small amount of waste residue is conveyed to manufacture cement or brick, most of waste residue is stored for.In waste residue containing zinc 8%~20%,
Lead 6%~25%, silver 300g/t or so, while there are also toxic elements such as germanium, arsenic, antimony, cadmiums, it is mentioned both at home and abroad to from this waste residue
Metallic zinc is taken increasingly to pay attention to.
Zinc in zinc leaching residue is most of with ZnFe2O4Form exist, on a small quantity in the form of ZnS exist.Utilize sulphation
Roasting-water extract technology, during sulfating roasting, the zinc in zinc leaching residue is converted to zinc sulfate, is easily recycled, but zinc
Leaching rate is lower.
Summary of the invention
The method of the object of the present invention is to provide a kind of from zinc leaching residue high efficiente callback zinc, to solve existing sulphation
The lower problem of zinc leaching rate existing for roasting-water extract technology.
The technical scheme is that：A method of the high efficiente callback zinc from zinc leaching residue includes the following steps：
Step 1: zinc leaching residue and sulfuric acid are uniformly mixed, mixture is placed in atmosphere furnace under normal pressure after mixing and is roasted
It burns；
Step 2: taking out calcining, cooling, grinding after the completion of roasting；
Calcining after grinding is put into the container for filling tap water by step 3 at normal temperatures and pressures, then sets the container
In the parallel magnetic field that magnetic induction intensity is 0.5~3T, leaching, mixing direction will make cation generate upward Lip river logical sequence
Hereby power；
Step 4 after leaching, is separated by solid-liquid separation.
As a further improvement of the present invention, in step 1, the temperature strip of zinc leaching residue and sulfuric acid at 200~300 DEG C
It is uniformly mixed under part, the maturing temperature of atmosphere furnace is 200~300 DEG C.Temperature is too low, and reaction effect is bad, and temperature is excessively high, is easy
Cause equipment damage.
As a further improvement of the present invention, in step 1, the quality of sulfuric acid is the 60%~80% of zinc leaching residue quality.
Excessive or very few sulfuric acid dosage can all reduce zinc leaching rate.
As a further improvement of the present invention, in step 3, liquid solid product mass ratio is 3~6 when water logging goes out:1.It is too small
Liquid solid product mass ratio influence zinc leaching rate, excessive liquid solid product mass ratio causes cost to waste.
As a further improvement of the present invention, in step 3, the leaching time is 1~1.5h.The leaching time
It is too long or too short can all reduce zinc leaching rate.
As a further improvement of the present invention, in step 3, mixing speed is 200~500r/min.
As a further improvement of the present invention, in step 1, calcining time is 2.5~3h.Zinc leaching rate is basic after 3h
It is constant.
Preferably, in step 1, the quality of sulfuric acid is the 70% of zinc leaching residue quality.
Preferably, in step 3, liquid solid product mass ratio is 4 when water logging goes out:1.
Preferably, in step 1, zinc leaching residue and sulfuric acid are uniformly mixed under the conditions of 250 DEG C of temperature, atmosphere furnace
Maturing temperature is 250 DEG C.
The present invention adds magnetic field on the basis of traditional handicraft, obtains following beneficial effect：
1. the present invention by applying magnetic field, activation system, change molecular structure water can reduce solution viscosity to the maximum extent,
Ferric iron hydrolysate in calcining is dissolved, the zinc of package is released；
2. the present invention can be improved the separating property of ion, shorten the extraction time of zinc by applying magnetic field；
3. the present invention can promote the rate of recovery of zinc, reduce production cost by applying magnetic field.
Specific embodiment
The following examples and comparative example can further illustrate the present invention, but do not limit the invention in any way.
Following embodiment and the raw materials used cadmia for being derived from output in certain smeltery's Zinc Hydrometallurgy Process of comparative example, it is main
Ingredient and its mass fraction are that Zn is 8.12%, Pb 6%, Ag 0.039%, SO respectively3For 17.2%, Fe2O3It is 17.2%.
Embodiment 1：
Zinc leaching residue and sulfuric acid are uniformly mixed by step 1 under conditions of maturing temperature is 200 DEG C, and sulfuric acid dosage is zinc leaching
The 60% of slag amount under normal pressure, is placed on and presets the atmosphere kiln roasting 3h that temperature is 200 DEG C；
Step 2 after the completion of roasting, takes out calcining, cooling, grinding；
Calcining after grinding is put into the container for filling tap water by step 3 at normal temperatures and pressures, is then placed in the container
Magnetic induction intensity is in the parallel magnetic field of 3T, and with the mixing speed leaching of 200r/min, mixing direction will make cation
Upward Lorentz force is generated, liquid solid product mass ratio is 3 when water logging goes out：1；Extraction time is 1h；
Step 4 after leaching, is separated by solid-liquid separation.
Zinc leaching rate is 85.3% at this time.
Embodiment 2：
Zinc leaching residue and sulfuric acid are uniformly mixed by step 1 under conditions of maturing temperature is 300 DEG C, and sulfuric acid dosage is zinc leaching
The 80% of slag amount under normal pressure, is placed on and presets the atmosphere kiln roasting 2.5h that temperature is 300 DEG C；
Step 2 after the completion of roasting, takes out calcining, cooling, grinding；
Calcining after grinding is put into the container for filling tap water by step 3 at normal temperatures and pressures, is then placed in the container
Magnetic induction intensity is in the parallel magnetic field of 3T, and with the mixing speed leaching of 500r/min, mixing direction will make cation
Upward Lorentz force is generated, liquid solid product mass ratio is 6 when water logging goes out：1；Extraction time is 1h；
Step 4 after leaching, is separated by solid-liquid separation.
Zinc leaching rate is 92.3% at this time.
Embodiment 3：
Zinc leaching residue and sulfuric acid are uniformly mixed by step 1 under conditions of maturing temperature is 250 DEG C, and sulfuric acid dosage is zinc leaching
The 70% of slag amount under normal pressure, is placed on and presets the atmosphere kiln roasting 2.5h that temperature is 250 DEG C；
Step 2 after the completion of roasting, takes out calcining, cooling, grinding；
Calcining after grinding is put into the container for filling tap water by step 3 at normal temperatures and pressures, is then placed in the container
Magnetic induction intensity is in the parallel magnetic field of 2T, and with the mixing speed leaching of 500r/min, mixing direction will make cation
Upward Lorentz force is generated, liquid solid product mass ratio is 4 when water logging goes out：1；Extraction time is 1h；
Step 4 after leaching, is separated by solid-liquid separation.
Zinc leaching rate is 98.2% at this time.
Embodiment 4：
Zinc leaching residue and sulfuric acid are uniformly mixed by step 1 under conditions of maturing temperature is 250 DEG C, and sulfuric acid dosage is zinc leaching
The 70% of slag amount under normal pressure, is placed on and presets the atmosphere kiln roasting 2.5h that temperature is 250 DEG C；
Step 2 after the completion of roasting, takes out calcining, cooling, grinding；
Calcining after grinding is put into the container for filling tap water by step 3 at normal temperatures and pressures, is then placed in the container
Magnetic induction intensity be 0.5T parallel magnetic field in, with the mixing speed leaching of 250r/min, mixing direction to make just from
Son generates upward Lorentz force, and liquid solid product mass ratio is 4 when water logging goes out：1；Extraction time is 1.5h；
Step 4 after leaching, is separated by solid-liquid separation.
Zinc leaching rate is 86.9% at this time.
Comparative example：
It is raw materials used same as Example 1, do not apply magnetic field.
Zinc leaching residue and sulfuric acid are uniformly mixed by step 1 under conditions of maturing temperature is 250 DEG C, and sulfuric acid dosage is zinc
The 70% of leached mud quality under normal pressure, is placed on and presets the atmosphere kiln roasting 2.5h that temperature is 250 DEG C；
Step 2 after the completion of roasting, takes out calcining, cooling, grinding；
Calcining after grinding is put into the container for filling tap water by step 3 at normal temperatures and pressures, with the stirring of 250r/min
Speed leaching, liquid solid product mass ratio is 4 when water logging goes out：1, extraction time 1h；
Step 4 after leaching, is separated by solid-liquid separation.
Zinc leaching rate is 71.4% at this time.
By comparison as can be seen that zinc leaching rate can be improved in magnetic field.
Claims (10)
1. a kind of method of the high efficiente callback zinc from zinc leaching residue, includes the following steps：
Step 1: zinc leaching residue and sulfuric acid are uniformly mixed, mixture is placed in atmosphere furnace under normal pressure after mixing and is roasted
It burns；
Step 2: taking out calcining, cooling, grinding after the completion of roasting；
Calcining after grinding is put into the container for filling tap water by step 3 at normal temperatures and pressures, then sets the container
In the parallel magnetic field that magnetic induction intensity is 0.5~3T, leaching, mixing direction will make cation generate upward Lip river logical sequence
Hereby power；
Step 4 after leaching, is separated by solid-liquid separation.
2. a kind of method of high efficiente callback zinc from zinc leaching residue according to claim 1, it is characterised in that：In step 1
In, zinc leaching residue and sulfuric acid are uniformly mixed under the conditions of 200~300 DEG C of temperature, and the maturing temperature of atmosphere furnace is 200~300
℃。
3. a kind of method of high efficiente callback zinc from zinc leaching residue according to claim 1 or 2, it is characterised in that：In step
In rapid one, the quality of sulfuric acid is the 60%~80% of zinc leaching residue quality.
4. a kind of method of high efficiente callback zinc from zinc leaching residue according to claim 3, it is characterised in that：In step 3
In, liquid solid product mass ratio is 3~6 when water logging goes out:1.
5. a kind of method of high efficiente callback zinc from zinc leaching residue according to claim 4, it is characterised in that：In step 3
In, the leaching time is 1~1.5h.
6. a kind of method of high efficiente callback zinc from zinc leaching residue according to claim 5, it is characterised in that：In step 3
In, mixing speed is 200~500r/min.
7. a kind of method of high efficiente callback zinc from zinc leaching residue according to claim 6, it is characterised in that：In step 1
In, calcining time is 2.5~3h.
8. a kind of method of high efficiente callback zinc from zinc leaching residue according to claim 7, it is characterised in that：In step 1
In, the quality of sulfuric acid is the 70% of zinc leaching residue quality.
9. a kind of method of high efficiente callback zinc from zinc leaching residue according to claim 8, it is characterised in that：In step 3
In, liquid solid product mass ratio is 4 when water logging goes out:1.
10. a kind of method of high efficiente callback zinc from zinc leaching residue according to claim 9, it is characterised in that：In step
In one, zinc leaching residue and sulfuric acid are uniformly mixed under the conditions of 250 DEG C of temperature, and the maturing temperature of atmosphere furnace is 250 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810550282.0A CN108929954A (en) | 2018-05-31 | 2018-05-31 | Method for efficiently recovering zinc from zinc leaching residues |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810550282.0A CN108929954A (en) | 2018-05-31 | 2018-05-31 | Method for efficiently recovering zinc from zinc leaching residues |
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| CN201810550282.0A Pending CN108929954A (en) | 2018-05-31 | 2018-05-31 | Method for efficiently recovering zinc from zinc leaching residues |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112578077A (en) * | 2020-11-11 | 2021-03-30 | 韶关凯鸿纳米材料有限公司 | Zinc recovery method for silicon dioxide detection |
Citations (7)
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| CN101550485A (en) * | 2008-04-02 | 2009-10-07 | 中国科学院过程工程研究所 | Oxidative pressure acid leaching method for processing purified waste residue in zinc hydrometallurgy process |
| CN101787439A (en) * | 2010-03-02 | 2010-07-28 | 邓彤 | Method for recovering valuable metals from metallurgical waste |
| CN102191371A (en) * | 2011-04-18 | 2011-09-21 | 中南大学 | Method for separating iron and zinc in traditional zinc iron and zinc process |
| CN102352445A (en) * | 2011-09-23 | 2012-02-15 | 来宾华锡冶炼有限公司 | Zinc leached residue hot acid reduction leaching method |
| CN102888511A (en) * | 2012-10-12 | 2013-01-23 | 中南大学 | Iron removal method of hydrometallurgical acidic leaching solution |
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2018
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| CN102191371A (en) * | 2011-04-18 | 2011-09-21 | 中南大学 | Method for separating iron and zinc in traditional zinc iron and zinc process |
| CN102352445A (en) * | 2011-09-23 | 2012-02-15 | 来宾华锡冶炼有限公司 | Zinc leached residue hot acid reduction leaching method |
| CN102888511A (en) * | 2012-10-12 | 2013-01-23 | 中南大学 | Iron removal method of hydrometallurgical acidic leaching solution |
| CN104988310A (en) * | 2015-07-30 | 2015-10-21 | 云南驰宏锌锗股份有限公司 | Purification method of germanium in zinc sulfate solution by using magnetic field |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112578077A (en) * | 2020-11-11 | 2021-03-30 | 韶关凯鸿纳米材料有限公司 | Zinc recovery method for silicon dioxide detection |
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Application publication date: 20181204 |