CN110079682A - A method of preparing high-grade secondary zinc oxide - Google Patents
A method of preparing high-grade secondary zinc oxide Download PDFInfo
- Publication number
- CN110079682A CN110079682A CN201910274111.4A CN201910274111A CN110079682A CN 110079682 A CN110079682 A CN 110079682A CN 201910274111 A CN201910274111 A CN 201910274111A CN 110079682 A CN110079682 A CN 110079682A
- Authority
- CN
- China
- Prior art keywords
- zinc oxide
- secondary zinc
- grade secondary
- preparing high
- filtrate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- C22B19/34—Obtaining zinc oxide
-
- 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
-
- 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
-
- 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
- C22B7/008—Wet processes by an alkaline or ammoniacal leaching
-
- 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
Abstract
The invention discloses a kind of methods for preparing high-grade secondary zinc oxide, comprising the following steps: (1) utilising zinc containing waste residue is leached with dilute sulfuric acid, and is filtered；(2) it is passed through ozone into filtrate, filters；(3) saturation sodium hydroxide solution is added into filtrate, generates zinc hydroxide slurry；(4) slurry is washed 2-3 times and is filtered；(5) filter residue is obtained into high-grade secondary zinc oxide through calcining.The method of preparation high-grade secondary zinc oxide provided by the invention, can effectively remove the impurity in secondary zinc oxide, and operating cost is low.
Description
Technical field
The present invention relates to chemical metallurgy technical fields, and in particular to a method of prepare high-grade secondary zinc oxide.
Background technique
The utilising zinc containing waste residue that metal smelt and ore dressing generate, if being deposited in waste residue stockyard, first occupied ground, second smelts
The dust of higher non-ferrous metal is contained in part in waste residue, will will cause serious dust pollution and heavy metal-polluted afterwards to the wind
Dye；Harmful components in some thinner utilising zinc containing waste residues are easier to dissolve out, and the underground water on periphery is caused to pollute and atmosphere
Pollution, it is seen then that utilising zinc containing waste residue is for greatly pollution hidden trouble shows the progress harmless treatment of this kind of waste existing for environment
It obtains particularly necessary.
Summary of the invention
The object of the present invention is to provide cost and a kind of good method for preparing high-grade secondary zinc oxide of effect can be reduced,
The preparation method not only avoids waste residue from accumulating occupied ground, but also can also mitigate the pollution to environment.
The technical scheme is that a kind of method for preparing high-grade secondary zinc oxide, comprising the following steps:
(1) thick secondary zinc oxide is leached with dilute sulfuric acid, and is filtered；
(2) it is passed through ozone into filtrate, filters；
(3) saturation sodium hydroxide solution is added into filtrate, generates zinc hydroxide slurry；
(4) slurry is washed 2-3 times and is filtered；
(5) high-grade secondary zinc oxide is obtained after calcining filter residue.
Preferably, in the step (1), dilute sulfuric acid concentration is 20%-40%, extraction time 1-2h.
Preferably, in the step (2), ozone, from being passed through from 1/2-2/3 under filtrate liquid level, is passed through 0.5- through gas-guide tube
1h。
Preferably, in the step (3), saturation sodium hydroxide solution volume is the 1/10-1/4 of filtrate volume.
Preferably, in the step (4), single water consumption is 1-2 times of slurry volume, and single wash 10-20min is washed
The process of washing is stirred continuously.
Preferably, in the step (5), calcination temperature is 800-1000 DEG C, calcination time 2-3h.
The present invention provides a kind of method for preparing high-grade secondary zinc oxide, and waste residue is not only avoided to accumulate occupied ground, but also
The pollution to environment can also be mitigated；This method is at low cost, effect is good, is applicable to large-scale production.
Specific embodiment
Following embodiment is intended to further illustrate the content of present invention, rather than limits the protection model of the claims in the present invention
It encloses.
Embodiment 1
A method of preparing high-grade secondary zinc oxide, comprising the following steps:
(1) thick secondary zinc oxide is leached with dilute sulfuric acid, and is filtered；Dilute sulfuric acid concentration is 20%, extraction time 1h；
(2) it is passed through ozone into filtrate, filters；Ozone, from being passed through from 1/2-2/3 under filtrate liquid level, is passed through through gas-guide tube
0.5-1h；
(3) saturation sodium hydroxide solution is added into filtrate, generates zinc hydroxide slurry；It is saturated sodium hydroxide solution volume
It is the 1/10 of filtrate volume；
(4) slurry is washed 2-3 times and is filtered；Single water consumption is 1-2 times of slurry volume, single wash 10-
20min, washing process are stirred continuously；
(5) high-grade secondary zinc oxide is obtained after calcining filter residue, calcination temperature is 800 DEG C, calcination time 3h.
Embodiment 2
A method of preparing high-grade secondary zinc oxide, comprising the following steps:
(1) thick secondary zinc oxide is leached with dilute sulfuric acid, and is filtered；Dilute sulfuric acid concentration is 25%, extraction time 1.5h；
(2) it is passed through ozone into filtrate, filters；Ozone, from being passed through from 1/2-2/3 under filtrate liquid level, is passed through through gas-guide tube
0.5-1h；
(3) saturation sodium hydroxide solution is added into filtrate, generates zinc hydroxide slurry；It is saturated sodium hydroxide solution volume
It is the 1/8 of filtrate volume；
(4) slurry is washed 2-3 times and is filtered；Single water consumption is 1-2 times of slurry volume, single wash 10-
20min, washing process are stirred continuously；
(5) high-grade secondary zinc oxide is obtained after calcining filter residue, calcination temperature is 900 DEG C, calcination time 2.5h.
Embodiment 3
A method of preparing high-grade secondary zinc oxide, comprising the following steps:
(1) thick secondary zinc oxide is leached with dilute sulfuric acid, and is filtered；Dilute sulfuric acid concentration is 30%, extraction time 1.5h；
(2) it is passed through ozone into filtrate, filters；Ozone, from being passed through from 1/2-2/3 under filtrate liquid level, is passed through through gas-guide tube
0.5-1h；
(3) saturation sodium hydroxide solution is added into filtrate, generates zinc hydroxide slurry；It is saturated sodium hydroxide solution volume
It is the 1/6 of filtrate volume；
(4) slurry is washed 2-3 times and is filtered；Single water consumption is 1-2 times of slurry volume, single wash 10-
20min, washing process are stirred continuously；
(5) high-grade secondary zinc oxide is obtained after calcining filter residue, calcination temperature is 900 DEG C, calcination time 2.5h.
Embodiment 4
A method of preparing high-grade secondary zinc oxide, comprising the following steps:
(1) thick secondary zinc oxide is leached with dilute sulfuric acid, and is filtered；Dilute sulfuric acid concentration is 40%, extraction time 2h；
(2) it is passed through ozone into filtrate, filters；Ozone, from being passed through from 1/2-2/3 under filtrate liquid level, is passed through through gas-guide tube
0.5-1h；
(3) saturation sodium hydroxide solution is added into filtrate, generates zinc hydroxide slurry；It is saturated sodium hydroxide solution volume
It is the 1/4 of filtrate volume；
(4) slurry is washed 2-3 times and is filtered；Single water consumption is 1-2 times of slurry volume, single wash 10-
20min, washing process are stirred continuously；
(5) high-grade secondary zinc oxide is obtained after calcining filter residue, calcination temperature is 1000 DEG C, calcination time 2h.
Above-described embodiment provides a kind of method for preparing high-grade secondary zinc oxide, and waste residue is not only avoided to accumulate occupied ground,
And pollution to environment can also be mitigated；This method is at low cost, effect is good, is applicable to large-scale production.
Claims (6)
1. a kind of method for preparing high-grade secondary zinc oxide, which comprises the following steps:
(1) utilising zinc containing waste residue is leached with dilute sulfuric acid, and is filtered；
(2) it is passed through ozone into filtrate, filters；
(3) saturation sodium hydroxide solution is added into filtrate, generates zinc hydroxide slurry；
(4) slurry is washed 2-3 times and is filtered；
(5) high-grade secondary zinc oxide is obtained after calcining filter residue.
2. a kind of method for preparing high-grade secondary zinc oxide according to claim 1, which is characterized in that the step (1)
In, dilute sulfuric acid concentration is 20%-40%, extraction time 1-2h.
3. a kind of method for preparing high-grade secondary zinc oxide according to claim 1, which is characterized in that the step (2)
In, ozone, from being passed through from 1/2-2/3 under filtrate liquid level, is passed through 0.5-1h through gas-guide tube.
4. a kind of method for preparing high-grade secondary zinc oxide according to claim 1, which is characterized in that the step (3)
In, saturation sodium hydroxide solution volume is the 1/10-1/4 of filtrate volume.
5. a kind of method for preparing high-grade secondary zinc oxide according to claim 1, which is characterized in that the step (4)
In, single water consumption is 1-2 times of slurry volume, and single wash 10-20min, washing process is stirred continuously.
6. a kind of method for preparing high-grade secondary zinc oxide according to claim 1, which is characterized in that the step (5)
In, calcination temperature is 800-1000 DEG C, calcination time 2-3h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910274111.4A CN110079682A (en) | 2019-04-08 | 2019-04-08 | A method of preparing high-grade secondary zinc oxide |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910274111.4A CN110079682A (en) | 2019-04-08 | 2019-04-08 | A method of preparing high-grade secondary zinc oxide |
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| CN110079682A true CN110079682A (en) | 2019-08-02 |
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ID=67414442
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| CN201910274111.4A Pending CN110079682A (en) | 2019-04-08 | 2019-04-08 | A method of preparing high-grade secondary zinc oxide |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118303A (en) * | 2019-12-05 | 2020-05-08 | 西部矿业股份有限公司 | Method for preparing zinc hypoxide by oxygen pressure leaching of zinc smelting solid waste slag |
| CN114906871A (en) * | 2022-06-08 | 2022-08-16 | 桂林理工大学 | Method for preparing nano zinc oxide by using secondary zinc oxide |
-
2019
- 2019-04-08 CN CN201910274111.4A patent/CN110079682A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111118303A (en) * | 2019-12-05 | 2020-05-08 | 西部矿业股份有限公司 | Method for preparing zinc hypoxide by oxygen pressure leaching of zinc smelting solid waste slag |
| CN114906871A (en) * | 2022-06-08 | 2022-08-16 | 桂林理工大学 | Method for preparing nano zinc oxide by using secondary zinc oxide |
| CN114906871B (en) * | 2022-06-08 | 2023-05-26 | 桂林理工大学 | Method for preparing nano zinc oxide by using secondary zinc oxide |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190802 |
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| WD01 | Invention patent application deemed withdrawn after publication |