CN109943722A - A kind of reuse method of secondary zinc oxide - Google Patents
A kind of reuse method of secondary zinc oxide Download PDFInfo
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- CN109943722A CN109943722A CN201910264990.2A CN201910264990A CN109943722A CN 109943722 A CN109943722 A CN 109943722A CN 201910264990 A CN201910264990 A CN 201910264990A CN 109943722 A CN109943722 A CN 109943722A
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- leachate
- zinc oxide
- secondary zinc
- ion
- reuse method
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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
- 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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Abstract
The invention discloses a kind of reuse methods of secondary zinc oxide, comprising the following steps: a, is sent into rotary kiln baking after mixing steel plant's dedusting ash with bituminous coal；B, step a roasting cooled material is subjected to alkali cleaning and leaching, isolated leachate with soda ash liquid；C, hydrogen peroxide is added into leachate and filters off deposit；D, zinc and copper sulphate are added into leachate and filters off deposit；E, leachate is subjected to ion-exchange treatment；F, the solution obtained after ion exchange is electrolysed, zinc is precipitated.The reuse method of secondary zinc oxide provided by the invention can effectively remove the fluorine chlorine and other impurity contained 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 kind of reuse method of secondary zinc oxide.
Background technique
The recoverying and utilizing method of secondary zinc oxide is mainly leached secondary zinc oxide by dilute sulfuric acid, is removed in solution of zinc sulfate
Iron ion, copper ion, cadmium ion, cobalt ions and fluorine chloride ion, then purified solution of zinc sulfate is electrolysed, analyse
Zinc out recycles secondary zinc oxide to realize.Wherein, when the content of fluorine chlorine is more than certain value in solution of zinc sulfate, can make
Occur " burning plate " phenomenon of anode plate dissolution, current efficiency decline in later period electrolytic process, electric zinc product impurity lead increases, anode
Damage it is serious, these influences aggravate with the increase of chlorinity, seriously affect electrolysis process process.
Summary of the invention
The purpose of the present invention is overcoming disadvantage mentioned above, a kind of secondary zinc oxide that can reduce cost and good purification is provided
Reuse method.
The technical scheme is that
A kind of reuse method of secondary zinc oxide, it is then passed through using the electric stove dust ash of steel plant as primary raw material
Following steps recycling:
A, rotary kiln baking is sent into after mixing steel plant's dedusting ash with bituminous coal；
B, step a roasting cooled material is subjected to alkali cleaning and leaching, isolated leachate with soda ash liquid；
C, hydrogen peroxide is added into leachate and filters off deposit；
D, zinc and copper sulphate are added into leachate and filters off deposit；
E, leachate is subjected to ion-exchange treatment；
F, the solution obtained after ion exchange is electrolysed, zinc is precipitated.
Preferably, the dedusting ash and bituminous coal mixed proportion are 1:1-6:1.
Preferably, the maturing temperature is 1450 DEG C -1550 DEG C.
Preferably, pH value is controlled in 7.4-7.6 in the alkali washing process；Alkali cleaning temperature is controlled at 75-80 DEG C.
Preferably, control solution temperature is 60-70 DEG C.
Preferably, the ion-exchange treatment process are as follows:
A, leachate pH value is adjusted to 3-5 and be added in ion exchange resin；
B, leachate is added in ion exchange column, carries out ion exchange, control adsorption time is 3-6 hours, ion
Exchanger resin is anion exchange resin.
The reuse method of secondary zinc oxide provided by the invention, it is at low cost, effect is good, it is applicable to large-scale production.
Specific embodiment
Embodiment 1
A kind of reuse method of secondary zinc oxide, it is then passed through using the electric stove dust ash of steel plant as primary raw material
Following steps recycling:
A, rotary kiln baking is sent into after mixing steel plant's dedusting ash with bituminous coal；
B, step a roasting cooled material is subjected to alkali cleaning and leaching, isolated leachate with soda ash liquid；
C, hydrogen peroxide is added into leachate and filters off deposit；
D, zinc and copper sulphate are added into leachate and filters off deposit；
E, leachate is subjected to ion-exchange treatment；
F, the solution obtained after ion exchange is electrolysed, zinc is precipitated.
Steel plant's dedusting ash and bituminous coal are mixed in 1: 1 ratio, by mixture helical feed into rotary kiln baking,
Maturing temperature is 1450 DEG C of conversion zone temperature or so.By the product cooled down after roasting through alkali cleaning, leaching, except iron, purification and impurity removal, from
Son exchange fluorine and chlorine removal, zinc electrolysis.In alkali washing process, soda ash joined as alkali wash water, in alkaline cleaning procedure, zinc oxide and soda ash
It reacts, generates zinc carbonate precipitating, the fluorine chlorine in secondary zinc oxide is drifted in solution, is discharged by waste liquid, so as to go
Except fluorine chlorine a large amount of in secondary zinc oxide；The zinc carbonate obtained through alkali cleaning carries out multistage removal of impurities, obtained depth after extract technology
Purified solution carries out ion-exchange treatment, and ion-exchange treatment is for removing fluorine chlorine a small amount of in solution, by ion exchange column,
Fluorine chloride ion in adsorbent solution, so that the removal rate of fluorine chlorine is further increased, the fluorine being used in the solution of zinc sulfate of electrolysis
The technique that chlorinity does not influence zinc electrolysis.In the recoverying and utilizing method of secondary zinc oxide of the invention, pass through alkali cleaning, ion exchange two
A processing step removes fluorine and chlorine removal, and the treating capacity of fluorine chlorine is big, and the good purification of fluorine chlorine is applicable to large-scale production technology.
Embodiment 2
A kind of reuse method of secondary zinc oxide, it is then passed through using the electric stove dust ash of steel plant as primary raw material
Following steps recycling:
A, rotary kiln baking is sent into after mixing steel plant's dedusting ash with bituminous coal；
B, step a roasting cooled material is subjected to alkali cleaning and leaching, isolated leachate with soda ash liquid；
C, hydrogen peroxide is added into leachate and filters off deposit；
D, zinc and copper sulphate are added into leachate and filters off deposit；
E, leachate is subjected to ion-exchange treatment；
F, the solution obtained after ion exchange is electrolysed, zinc is precipitated.
Steel plant's dedusting ash and bituminous coal are mixed in 3: 1 ratios, by mixture helical feed into rotary kiln baking,
Maturing temperature is 1500 DEG C of conversion zone temperature or so.By the product cooled down after roasting through alkali cleaning, leaching, except iron, purification and impurity removal, from
Son exchange fluorine and chlorine removal, zinc electrolysis.In alkali washing process, soda ash joined as alkali wash water, in alkaline cleaning procedure, zinc oxide and soda ash
It reacts, generates zinc carbonate precipitating, the fluorine chlorine in secondary zinc oxide is drifted in solution, is discharged by waste liquid, so as to go
Except fluorine chlorine a large amount of in secondary zinc oxide；The zinc carbonate obtained through alkali cleaning carries out multistage removal of impurities, obtained depth after extract technology
Purified solution carries out ion-exchange treatment, and ion-exchange treatment is for removing fluorine chlorine a small amount of in solution, by ion exchange column,
Fluorine chloride ion in adsorbent solution, so that the removal rate of fluorine chlorine is further increased, the fluorine being used in the solution of zinc sulfate of electrolysis
The technique that chlorinity does not influence zinc electrolysis.In the recoverying and utilizing method of secondary zinc oxide of the invention, pass through alkali cleaning, ion exchange two
A processing step removes fluorine and chlorine removal, and the treating capacity of fluorine chlorine is big, and the good purification of fluorine chlorine is applicable to large-scale production technology.
Embodiment 3
A kind of reuse method of secondary zinc oxide, it is then passed through using the electric stove dust ash of steel plant as primary raw material
Following steps recycling:
A, rotary kiln baking is sent into after mixing steel plant's dedusting ash with bituminous coal；
B, step a roasting cooled material is subjected to alkali cleaning and leaching, isolated leachate with soda ash liquid；
C, hydrogen peroxide is added into leachate and filters off deposit；
D, zinc and copper sulphate are added into leachate and filters off deposit；
E, leachate is subjected to ion-exchange treatment；
F, the solution obtained after ion exchange is electrolysed, zinc is precipitated.
Steel plant's dedusting ash and bituminous coal are mixed in 6: 1 ratios, by mixture helical feed into rotary kiln baking,
Maturing temperature is 1550 DEG C of conversion zone temperature or so.By the product cooled down after roasting through alkali cleaning, leaching, except iron, purification and impurity removal, from
Son exchange fluorine and chlorine removal, zinc electrolysis.In alkali washing process, soda ash joined as alkali wash water, in alkaline cleaning procedure, zinc oxide and soda ash
It reacts, generates zinc carbonate precipitating, the fluorine chlorine in secondary zinc oxide is drifted in solution, is discharged by waste liquid, so as to go
Except fluorine chlorine a large amount of in secondary zinc oxide；The zinc carbonate obtained through alkali cleaning carries out multistage removal of impurities, obtained depth after extract technology
Purified solution carries out ion-exchange treatment, and ion-exchange treatment is for removing fluorine chlorine a small amount of in solution, by ion exchange column,
Fluorine chloride ion in adsorbent solution, so that the removal rate of fluorine chlorine is further increased, the fluorine being used in the solution of zinc sulfate of electrolysis
The technique that chlorinity does not influence zinc electrolysis.In the recoverying and utilizing method of secondary zinc oxide of the invention, pass through alkali cleaning, ion exchange two
A processing step removes fluorine and chlorine removal, and the treating capacity of fluorine chlorine is big, and the good purification of fluorine chlorine is applicable to large-scale production technology.
Embodiment 4
A kind of reuse method of secondary zinc oxide, it is then passed through using the electric stove dust ash of steel plant as primary raw material
Following steps recycling:
A, rotary kiln baking is sent into after mixing steel plant's dedusting ash with bituminous coal；
B, step a roasting cooled material is subjected to alkali cleaning and leaching, isolated leachate with soda ash liquid；
C, hydrogen peroxide is added into leachate and filters off deposit；
D, zinc and copper sulphate are added into leachate and filters off deposit；
E, leachate is subjected to ion-exchange treatment；
F, the solution obtained after ion exchange is electrolysed, zinc is precipitated.
Steel plant's dedusting ash and bituminous coal are mixed in 5: 1 ratios, by mixture helical feed into rotary kiln baking,
Maturing temperature is 1500 DEG C of conversion zone temperature or so.By the product cooled down after roasting through alkali cleaning, leaching, except iron, purification and impurity removal, from
Son exchange fluorine and chlorine removal, zinc electrolysis.In alkali washing process, soda ash joined as alkali wash water, in alkaline cleaning procedure, zinc oxide and soda ash
It reacts, generates zinc carbonate precipitating, the fluorine chlorine in secondary zinc oxide is drifted in solution, is discharged by waste liquid, so as to go
Except fluorine chlorine a large amount of in secondary zinc oxide；The zinc carbonate obtained through alkali cleaning carries out multistage removal of impurities, obtained depth after extract technology
Purified solution carries out ion-exchange treatment, and ion-exchange treatment is for removing fluorine chlorine a small amount of in solution, by ion exchange column,
Fluorine chloride ion in adsorbent solution, so that the removal rate of fluorine chlorine is further increased, the fluorine being used in the solution of zinc sulfate of electrolysis
The technique that chlorinity does not influence zinc electrolysis.In the recoverying and utilizing method of secondary zinc oxide of the invention, pass through alkali cleaning, ion exchange two
A processing step removes fluorine and chlorine removal, and the treating capacity of fluorine chlorine is big, and the good purification of fluorine chlorine is applicable to large-scale production technology.
Claims (6)
1. a kind of reuse method of secondary zinc oxide, which is characterized in that it be using the electric stove dust ash of steel plant as primary raw material,
Then it is recycled by following steps:
A, rotary kiln baking is sent into after mixing steel plant's dedusting ash with bituminous coal；
B, alkali cleaning and leaching, isolated leachate will be carried out with soda ash liquid after step a roasting cooling；
C, hydrogen peroxide is added into leachate and filters off deposit；
D, zinc and copper sulphate are added into leachate and filters off deposit；
E, leachate is subjected to ion-exchange treatment；
F, the solution obtained after ion exchange is electrolysed, zinc is precipitated.
2. the reuse method of secondary zinc oxide according to claim 1, which is characterized in that the dedusting ash is mixed with bituminous coal
Ratio is 1:1-6:1.
3. the reuse method of secondary zinc oxide according to claim 1, which is characterized in that the maturing temperature is 1450
℃-1550℃。
4. the reuse method of secondary zinc oxide according to claim 1, which is characterized in that pH value control in the alkali washing process
System is in 7.4-7.6；Alkali cleaning temperature is controlled at 75-80 DEG C.
5. the reuse method of secondary zinc oxide according to claim 1, which is characterized in that the control solution temperature is
60-70℃。
6. the reuse method of secondary zinc oxide according to claim 1, which is characterized in that the ion-exchange treatment process
Are as follows:
A, leachate pH value is adjusted to 3-5 and be added in ion exchange resin；
B, leachate is added in ion exchange column, carries out ion exchange, control adsorption time is 3-6 hours, ion exchange
Resin is anion exchange resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910264990.2A CN109943722A (en) | 2019-04-03 | 2019-04-03 | A kind of reuse method of secondary zinc oxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910264990.2A CN109943722A (en) | 2019-04-03 | 2019-04-03 | A kind of reuse method of secondary zinc oxide |
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| CN109943722A true CN109943722A (en) | 2019-06-28 |
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| CN201910264990.2A Pending CN109943722A (en) | 2019-04-03 | 2019-04-03 | A kind of reuse method of secondary zinc oxide |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184468A (en) * | 2019-07-08 | 2019-08-30 | 云南驰宏资源综合利用有限公司 | A method of recycling copper from secondary zinc oxide |
| CN111235407A (en) * | 2020-03-04 | 2020-06-05 | 济源市鲁泰纳米材料有限公司 | Method for purifying aluminum-containing secondary zinc oxide leaching solution and aluminum removal method |
-
2019
- 2019-04-03 CN CN201910264990.2A patent/CN109943722A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110184468A (en) * | 2019-07-08 | 2019-08-30 | 云南驰宏资源综合利用有限公司 | A method of recycling copper from secondary zinc oxide |
| CN111235407A (en) * | 2020-03-04 | 2020-06-05 | 济源市鲁泰纳米材料有限公司 | Method for purifying aluminum-containing secondary zinc oxide leaching solution and aluminum removal method |
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Application publication date: 20190628 |
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| WD01 | Invention patent application deemed withdrawn after publication |