CN108660318A - A kind of recovery process recycling metallic zinc from waste paint slag - Google Patents
A kind of recovery process recycling metallic zinc from waste paint slag Download PDFInfo
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- CN108660318A CN108660318A CN201810573222.0A CN201810573222A CN108660318A CN 108660318 A CN108660318 A CN 108660318A CN 201810573222 A CN201810573222 A CN 201810573222A CN 108660318 A CN108660318 A CN 108660318A
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- Prior art keywords
- paint slag
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- zinc
- paint
- slag
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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
- C22B7/001—Dry 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/02—Roasting 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/04—Obtaining zinc by distilling
-
- 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)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Organic Chemistry (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Solid Wastes (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The present invention relates to a kind of from waste paint slag recycles the recovery process of metallic zinc, completes in two stages, processing step is：First stage is the aqueous phase reactions stage：1）Crushing material：Paint slag, water and alkali are mixed by a certain percentage, ball mill is re-fed into and is ground；2）Macromolecule decomposes：Catalyst is added into the processed paint slag of ball mill, is warming up to 60~80 DEG C and reacts 2 hours, the high molecular material in paint slag is made to be decomposed into the compound of low molecular weight；3）It is dry：Moisture is separated from useless paint degradation product, its water content is made to be less than 5%；4）It is broken：Material after drying is bulk, it is become the powder of 50~100 mesh by pulverizer；Second stage is the solid phase reaction stage：Reduction carbon dust is added into broken paint slag mixture, is warming up to 1000 DEG C or so roastings, the gaseous metal zinc that high temperature distillation comes out enters condenser, becomes liquid Zn, pour into zinc ingot metal, for further rectifying or electrolysis.
Description
Technical field
The invention belongs to technical field of waste recovery, are related to a kind of recovery process recycling metallic zinc from waste paint slag.
Background technology
For anti-corrosion, the surface of the steel pieces such as ship, automobile, container, bridge is substantially all using coating（Paint）, oil
The dosage of paint increases year by year, and the paint slag generated therewith also can not be ignored.Paint discards the residue generated, or the paint applied
The slag generated is peeled off, slag is referred to as painted.The manufacturing industry such as ship, container generate a large amount of waste paint slags, and ship, container, bridge are regular
Mopping, the waste paint slag high number scraped off, it is estimated that the whole nation paint slag millions of tons that generates every year paints slag and is treated as going
One problem of industry, the processing mode that generally use is burned and filled in industry at present, this 2 kinds of processing modes are not only of high cost,
And it will produce secondary pollution.The regeneration of paint slag not only solves problem of environmental pollution, but also can generate value-rising.
Zinc rich primer paint slag in ship, FCL priming paint process is generally acknowledged pole since zinc content is high, filler impurity is few
Has the construction waste material of recovery value.Common recovery method is by painting Slag treatment, broken, magnetic separation, milling and paint deployment, inciting somebody to action
Production line paint slag recycles, but can will also paint most of zinc powder in slag while crushing paint slag and aoxidize, and paint slag is
As a kind of filler, not effective ingredient is used.
It is mainly zinc powder, filler, high-molecular compound, solidfied material and a small amount of mechanical admixture to paint ingredient in slag.
Having found the patent for being related to waste paint slag and zinc has 21, from waste paint slag extract zinc only there are two：CN1243167A is from containing zinc
The method and apparatus of extracting zinc in waste residue, the method and apparatus that content is extracting zinc devise a kind of special stove and environmental protection
Facility is analyzed from principle, it may be possible to recycle zinc oxide；Patent CN107286965A one kind waste painting slag containing zinc is cooperateed with vinasse
Disposition recycling zinc technology and system, content are that waste paint slag cooperates with pyrolysis, recoverable metal zinc with vinasse.
Above-mentioned patent decomposes waste paint slag at high temperature, under the high temperature conditions, paints the high molecular material and additive in slag
Decompose, crack, double decomposition, the chemical reactions such as carbonization, the carcinogens such as benzene, BaP are generated, as high-temp waste gas enters
It is strong to influence the mankind in fact, exhaust gas after processing, still has micro carcinogen to enter atmospheric environment for exhaust treatment system
Health.
Invention content
In order to overcome the disadvantages mentioned above of the prior art, the present invention to provide a kind of recycling work recycling metallic zinc from waste paint slag
The high molecular material painted in slag is decomposed into the lower product of molecular weight by skill, then high-temperature roasting again, way of distillation extraction
Metallic zinc reduces harmful substance in exhaust gas（Especially carcinogen）Concentration and discharge capacity.
The technical solution adopted by the present invention to solve the technical problems is：A kind of recycling for recycling metallic zinc from waste paint slag
Technique is completed in two stages, and processing step is：
First stage is the aqueous phase reactions stage：
1）Crushing material：Paint slag, water and alkali are mixed by a certain percentage, ball mill is re-fed into and is ground；
2）Macromolecule decomposes：Catalyst is added into the processed paint slag of ball mill, is warming up to 60~80 DEG C and reacts 2 hours, make
High molecular material in paint slag is decomposed into the compound of low molecular weight；
3）It is dry：Moisture is separated from useless paint degradation product, its water content is made to be less than 5%；
4）It is broken：Material after drying is bulk, it is become the powder of 50~100 mesh by pulverizer；
Second stage is the solid phase reaction stage：
Reduction carbon dust is added into broken paint slag mixture, is warming up to 1000 DEG C or so roastings, the gas that high temperature distillation comes out
State metallic zinc enters condenser, becomes liquid Zn, pours into zinc ingot metal, for further rectifying or electrolysis.
The step（1）In alkali include lime, the amount of paint slag is 25~35%, alkali number 2~4% in mixture.
The step（2）Catalyst is peroxide, and peroxide includes hydrogen peroxide.
Carbon dust is restored in the second stage to be not added with, can be by zinc oxide reduction using the organic matter in material.
The positive effect of the present invention is：Paint slag after degradation carries the zinc stage, VOC in outer waste air in high-temperature roasting
Concentration is very low, and the carcinogens such as benzene class have been not present, and through the purified exhaust gas of emission-control equipment, every discharge index is less than
《Industrial furnace atmosphere pollutants emission standards》（GB9078-1996）And《Guangdong Province's provincial standard Air Pollutant Emission limit
Value》（DB44-27-2001）In tighter person.
Description of the drawings
Fig. 1 is present invention process flow chart.
Specific implementation mode
With reference to embodiment, the present invention is further described.
A kind of recovery process recycling metallic zinc from waste paint slag, is completed, processing step is in two stages：
First stage is the aqueous phase reactions stage：
1）Crushing material：Paint slag, water and alkali are mixed by a certain percentage, ball mill is re-fed into and is ground；
2）Macromolecule decomposes：Catalyst is added into the processed paint slag of ball mill, is warming up to 60~80 DEG C and reacts 2 hours, make
High molecular material in paint slag is decomposed into the compound of low molecular weight；
3）It is dry：Moisture is separated from useless paint degradation product, its water content is made to be less than 5%；
4）It is broken：Material after drying is bulk, it is become the powder of 50~100 mesh by pulverizer；
Second stage is the solid phase reaction stage：
Reduction carbon dust is added into broken paint slag mixture, is warming up to 1000 DEG C or so roastings, the gas that high temperature distillation comes out
State metallic zinc enters condenser, becomes liquid Zn, pours into zinc ingot metal, for further rectifying or electrolysis.
The step（1）In alkali include lime, in mixture the amount of paint slag be about 25~35%, alkali number about 2~4%.
The step（2）Catalyst is peroxide, and peroxide includes hydrogen peroxide.
Carbon dust is restored in the second stage to be not added with, can be by zinc oxide reduction using the organic matter in material.
Paint slag after degradation carries the zinc stage in high-temperature roasting, and VOC concentration is very low in outer waste air, and benzene has been not present
The carcinogens such as class, through the purified exhaust gas of emission-control equipment, every discharge index is less than《Industrial furnace atmosphere pollution is arranged
Put standard》（GB9078-1996）And《Guangdong Province's provincial standard Air Pollutant Emission limit value》（DB44-27-2001）In compared with
Yan Zhe.
Claims (4)
1. a kind of recovery process recycling metallic zinc from waste paint slag, is completed, it is characterised in that processing step is in two stages：
First stage is the aqueous phase reactions stage：
1）Crushing material：Paint slag, water and alkali are mixed by a certain percentage, ball mill is re-fed into and is ground；
2）Macromolecule decomposes：Catalyst is added into the processed paint slag of ball mill, is warming up to 60~80 DEG C and reacts 2 hours, make
High molecular material in paint slag is decomposed into the compound of low molecular weight；
3）It is dry：Moisture is separated from useless paint degradation product, its water content is made to be less than 5%；
4）It is broken：Material after drying is bulk, it is become the powder of 50~100 mesh by pulverizer；
Second stage is the solid phase reaction stage：
Reduction carbon dust is added into broken paint slag mixture, is warming up to 1000 DEG C or so roastings, the gas that high temperature distillation comes out
State metallic zinc enters condenser, becomes liquid Zn, pours into zinc ingot metal, for further rectifying or electrolysis.
2. the recovery process of metallic zinc is recycled from waste paint slag as described in claim 1, it is characterised in that：The first stage
Step（1）In alkali include lime, the amount of paint slag is 25~35%, alkali number 2~4% in mixture.
3. the recovery process of metallic zinc is recycled from waste paint slag as described in claim 1, it is characterised in that：The first stage
Step（2）Catalyst is peroxide, and peroxide includes hydrogen peroxide.
4. the recovery process of metallic zinc is recycled from waste paint slag as described in claim 1, it is characterised in that：In the second stage
Middle reduction carbon dust can be not added with, can be by zinc oxide reduction using the organic matter in material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810573222.0A CN108660318A (en) | 2018-06-06 | 2018-06-06 | A kind of recovery process recycling metallic zinc from waste paint slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810573222.0A CN108660318A (en) | 2018-06-06 | 2018-06-06 | A kind of recovery process recycling metallic zinc from waste paint slag |
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| CN108660318A true CN108660318A (en) | 2018-10-16 |
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| CN201810573222.0A Pending CN108660318A (en) | 2018-06-06 | 2018-06-06 | A kind of recovery process recycling metallic zinc from waste paint slag |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338117A (en) * | 2018-12-05 | 2019-02-15 | 攀枝花钢城集团有限公司 | Utilize the process and its production system of hot galvanizing residue production kirsite |
| CN109722535A (en) * | 2018-12-28 | 2019-05-07 | 广东明方科技有限公司 | A kind of innocuous recovering process of zinc rich paint slag |
| CN110172584A (en) * | 2019-05-22 | 2019-08-27 | 维新制漆（江西）有限公司 | A kind of cadmia recyclable device and its method |
| 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 |
| CN113969355A (en) * | 2021-09-27 | 2022-01-25 | 铜陵有色设计研究院有限责任公司 | Short-process preparation process for preparing zinc-cadmium alloy by using organic cobalt slag |
| CN115821056A (en) * | 2022-09-14 | 2023-03-21 | 湖南锐异资环科技有限公司 | Method for co-processing zinc-containing ash and zinc-containing paint slag in steel plant |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243167A (en) * | 1998-07-28 | 2000-02-02 | 金云龙 | Method for extracting zinc from zinc-contained waste residue and apparatus thereof |
| US20040045590A1 (en) * | 2002-09-11 | 2004-03-11 | Fujitsu Limited | Method of removing paint applied to magnesium-alloy material |
| CN102408820A (en) * | 2011-07-29 | 2012-04-11 | 哈尔滨理工大学 | Preparation method of water-soluble low-contact-angle half-inorganic silicon sheet varnish |
| EP2505264A4 (en) * | 2009-11-26 | 2014-09-03 | Nisshinbo Holdings Inc | Carbon catalyst for decomposition of hazardous substance, hazardous-substance-decomposing material, and method for decomposition of hazardous substance |
| CN107058743A (en) * | 2017-04-12 | 2017-08-18 | 广东工业大学 | A kind of method of industrial coating Sewage treatment zinc powder and application |
-
2018
- 2018-06-06 CN CN201810573222.0A patent/CN108660318A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1243167A (en) * | 1998-07-28 | 2000-02-02 | 金云龙 | Method for extracting zinc from zinc-contained waste residue and apparatus thereof |
| US20040045590A1 (en) * | 2002-09-11 | 2004-03-11 | Fujitsu Limited | Method of removing paint applied to magnesium-alloy material |
| EP2505264A4 (en) * | 2009-11-26 | 2014-09-03 | Nisshinbo Holdings Inc | Carbon catalyst for decomposition of hazardous substance, hazardous-substance-decomposing material, and method for decomposition of hazardous substance |
| CN102408820A (en) * | 2011-07-29 | 2012-04-11 | 哈尔滨理工大学 | Preparation method of water-soluble low-contact-angle half-inorganic silicon sheet varnish |
| CN107058743A (en) * | 2017-04-12 | 2017-08-18 | 广东工业大学 | A kind of method of industrial coating Sewage treatment zinc powder and application |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109338117A (en) * | 2018-12-05 | 2019-02-15 | 攀枝花钢城集团有限公司 | Utilize the process and its production system of hot galvanizing residue production kirsite |
| CN109722535A (en) * | 2018-12-28 | 2019-05-07 | 广东明方科技有限公司 | A kind of innocuous recovering process of zinc rich paint slag |
| CN110172584A (en) * | 2019-05-22 | 2019-08-27 | 维新制漆（江西）有限公司 | A kind of cadmia recyclable device and its method |
| 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 |
| CN113969355A (en) * | 2021-09-27 | 2022-01-25 | 铜陵有色设计研究院有限责任公司 | Short-process preparation process for preparing zinc-cadmium alloy by using organic cobalt slag |
| CN115821056A (en) * | 2022-09-14 | 2023-03-21 | 湖南锐异资环科技有限公司 | Method for co-processing zinc-containing ash and zinc-containing paint slag in steel plant |
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Application publication date: 20181016 |
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