CN105710379A - Method for spraying drying of superfine silver powder - Google Patents
Method for spraying drying of superfine silver powder Download PDFInfo
- Publication number
- CN105710379A CN105710379A CN201610106500.2A CN201610106500A CN105710379A CN 105710379 A CN105710379 A CN 105710379A CN 201610106500 A CN201610106500 A CN 201610106500A CN 105710379 A CN105710379 A CN 105710379A
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- CN
- China
- Prior art keywords
- silver powder
- super fine
- fine silver
- spray drying
- drying
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- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
- B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
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- Manufacture Of Metal Powder And Suspensions Thereof (AREA)
Abstract
The invention discloses a method for spraying drying of superfine silver powder. A certain number of surface active agents are added in the washed silver powder and ultrasonically dispersed, ultrasonically-dispersed pasty materials are added into a drying cavity from the position of a nozzle of a spraying drying device, the pasty materials are heated by hot air at a certain temperature to become dried particles, and finally products are collected into a collecting barrel through a cyclone separator. The method is utilized for drying the superfine silver powder, the superfine silver powder product drying efficiency is improved by more than 80%, and meanwhile the D50 data of the superfine silver powder are reduced. The drying speed is high, and particle aggregation is reduced.
Description
Technical field
The invention belongs to nonferrous metal product production field, relate to the drying means of super fine silver powder.
Background technology
Spray drying is a kind of method that systematization technique is applied to dry materials.In hothouse by solvent or diluent after atomization, with in the contacting of hot-air, moisture rapid vaporization, namely obtain dry products.This method can directly make solution, emulsion be dried to powdery or particulate preparation, can economize the operation such as devaporation, pulverizing.For argentum powder product, adopt spray drying can reduce the static dry reunion produced, and the product that spray drying produces is Powdered, can reduce broken process, improve production efficiency.There is no the report that spray drying technology is applied to the dry aspect of super fine silver powder both at home and abroad at present.
Summary of the invention
For the shortcoming overcoming rate of drying in super fine silver powder static state dry run slow and granule is easily reunited, the present invention provides the method for spray drying super fine silver powder.
A kind of method that the technical scheme is that spray drying super fine silver powder, settles the slurry system containing super fine silver powder, pours out after supernatant clarification；Agitator treating, then settles again, repeats said process, and after filtration, super fine silver powder has washed；The slurry of silver content 60% is obtained by filter cake adds pure water, it is subsequently adding surfactant ultrasonic disperse, pasty material after ultrasonic disperse adds drying chamber from the nozzle of spray dryer, form dry granule through uniform temperature hot air, finally by cyclone separator, product is collected.
Preferably, agitator treating, sedimentation, repeat 5 times.
Preferably, oleic acid selected by described surfactant.
Preferably, the mass ratio of oleic acid and argentum powder is 1:100.
Preferably, the ultrasonic disperse time is 3-5 minute.
Preferably, pasty material from the nozzle of spray dryer add drying chamber time, charging rate 1-2L/min, control inlet temperature 260 DEG C-290 DEG C.
The invention has the beneficial effects as follows: adopting the dry super fine silver powder of the method, the product drying efficiency of super fine silver powder improves more than 80%, rate of drying is fast, reduce particle agglomeration, and the D50 data of super fine silver powder reduce simultaneously.
Accompanying drawing explanation
Fig. 1 is the flow chart of the present invention.
Detailed description of the invention
Comparative example: super fine silver powder is particle diameter is the class ball shape silver powder of about 1 μm.After super fine silver powder synthesis, slurry system is settled, pour out after supernatant clarification；With washing kettle, super fine silver powder is stirred washing, then settles again, repeat said process 5 times；After natural filtration, super fine silver powder has washed；Product puts into 70 DEG C of dry 10h in baking oven.The laser particle size D50 data of the super fine silver powder that the method obtains are 3.5 μm, and moisture is 0.06%.
Embodiment 1 super fine silver powder is particle diameter is the class ball shape silver powder of about 1 μm.After super fine silver powder synthesis, slurry system is settled, pour out after supernatant clarification；With washing kettle, super fine silver powder is stirred washing, then settles again, repeat said process 5 times；After natural filtration, super fine silver powder has washed；Filter cake will add a certain amount of pure water obtain the slurry of silver content 60%, it is subsequently adding a certain amount of oleic acid solutions, the mass ratio of oleic acid and argentum powder is: 1:100, ultrasonic 3 minutes, pasty material after ultrasonic adds drying chamber, charging rate 1L/min from the nozzle of spray dryer, controls inlet temperature 260 DEG C, reinforced complete by cyclone separator rewinding cylinder collection argentum powder, this process is 2h consuming time altogether.The laser particle size D50 data of the super fine silver powder that the method obtains are 2.2 μm, and moisture is 0.03%.
Embodiment 2 super fine silver powder is particle diameter is the class ball shape silver powder of about 1 μm.After super fine silver powder synthesis, slurry system is settled, pour out after supernatant clarification；With washing kettle, super fine silver powder is stirred washing, then settles again, repeat said process 5 times；After natural filtration, super fine silver powder has washed；Filter cake will add a certain amount of pure water obtain the slurry of silver content 60%, it is subsequently adding a certain amount of oleic acid solutions, the mass ratio of oleic acid and argentum powder is: 1:100, ultrasonic 3 minutes, pasty material after ultrasonic adds drying chamber, charging rate 2L/min from the nozzle of spray dryer, controls inlet temperature 290 DEG C, reinforced complete by cyclone separator rewinding cylinder collection argentum powder, this process is 1.5h consuming time altogether.The laser particle size D50 data of the super fine silver powder that the method obtains are 2.5 μm, and moisture is 0.05%.
As can be seen here: dried moisture similar even lower time, adopt this method to significantly reduce drying time, efficiency is greatly improved, and laser particle size D50 data are also reduced largely.
Claims (6)
1. a method for spray drying super fine silver powder, is characterized in that: the slurry system containing super fine silver powder is settled, and pours out after supernatant clarification；Agitator treating, then settles again, repeats said process, and after filtration, super fine silver powder has washed；The slurry of silver content 60% is obtained by filter cake adds pure water, it is subsequently adding surfactant ultrasonic disperse, pasty material after ultrasonic disperse adds drying chamber from the nozzle of spray dryer, form dry granule through uniform temperature hot air, finally by cyclone separator, product is collected.
2. the method for spray drying super fine silver powder according to claim 1, is characterized in that: agitator treating, sedimentation, repeats 5 times.
3. the method for spray drying super fine silver powder according to claim 1, is characterized in that: oleic acid selected by described surfactant.
4. the method for spray drying super fine silver powder according to claim 3, is characterized in that: the mass ratio of oleic acid and argentum powder is 1:100.
5. the method for spray drying super fine silver powder according to claim 1, is characterized in that: the ultrasonic disperse time is 3-5 minute.
6. the method for spray drying super fine silver powder according to claim 1, is characterized in that: pasty material from the nozzle of spray dryer add drying chamber time, charging rate 1-2L/min, control inlet temperature 260 DEG C-290 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610106500.2A CN105710379A (en) | 2016-02-26 | 2016-02-26 | Method for spraying drying of superfine silver powder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610106500.2A CN105710379A (en) | 2016-02-26 | 2016-02-26 | Method for spraying drying of superfine silver powder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105710379A true CN105710379A (en) | 2016-06-29 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610106500.2A Pending CN105710379A (en) | 2016-02-26 | 2016-02-26 | Method for spraying drying of superfine silver powder |
Country Status (1)
| Country | Link |
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| CN (1) | CN105710379A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111163880A (en) * | 2017-10-04 | 2020-05-15 | Ｊｘ金属株式会社 | Method for producing surface-treated copper fine particles |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09125110A (en) * | 1995-11-07 | 1997-05-13 | Fukuda Metal Foil & Powder Co Ltd | Production of electrolytic silver powder |
| CN1387968A (en) * | 2001-05-26 | 2003-01-01 | 西北稀有金属材料研究院 | Prepn of superfine spherical silver powder |
| CN101279376A (en) * | 2008-05-15 | 2008-10-08 | 金川集团有限公司 | Preparation of high dispersed superfine spherical silver powder for conductive silver slurry |
| CN102974833A (en) * | 2012-11-20 | 2013-03-20 | 宁波广博纳米新材料股份有限公司 | Method for preparing flake silver powder |
| CN103600087A (en) * | 2013-11-18 | 2014-02-26 | 厦门理工学院 | Method for manufacturing ultrafine tungsten and silver composite powder by colloidal sol spray and reduction processes |
| CN103648630A (en) * | 2011-08-01 | 2014-03-19 | 瓦克化学股份公司 | Process for producing dispersible powders |
| CN104014804A (en) * | 2014-05-20 | 2014-09-03 | 苏州明动新材料科技有限公司 | Preparation method of nanometer silver powder with particles controllable |
| CN104923801A (en) * | 2014-03-17 | 2015-09-23 | 北京中科纳通电子技术有限公司 | Method for preparing nanosilver powder in batches |
-
2016
- 2016-02-26 CN CN201610106500.2A patent/CN105710379A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09125110A (en) * | 1995-11-07 | 1997-05-13 | Fukuda Metal Foil & Powder Co Ltd | Production of electrolytic silver powder |
| CN1387968A (en) * | 2001-05-26 | 2003-01-01 | 西北稀有金属材料研究院 | Prepn of superfine spherical silver powder |
| CN101279376A (en) * | 2008-05-15 | 2008-10-08 | 金川集团有限公司 | Preparation of high dispersed superfine spherical silver powder for conductive silver slurry |
| CN103648630A (en) * | 2011-08-01 | 2014-03-19 | 瓦克化学股份公司 | Process for producing dispersible powders |
| CN102974833A (en) * | 2012-11-20 | 2013-03-20 | 宁波广博纳米新材料股份有限公司 | Method for preparing flake silver powder |
| CN103600087A (en) * | 2013-11-18 | 2014-02-26 | 厦门理工学院 | Method for manufacturing ultrafine tungsten and silver composite powder by colloidal sol spray and reduction processes |
| CN104923801A (en) * | 2014-03-17 | 2015-09-23 | 北京中科纳通电子技术有限公司 | Method for preparing nanosilver powder in batches |
| CN104014804A (en) * | 2014-05-20 | 2014-09-03 | 苏州明动新材料科技有限公司 | Preparation method of nanometer silver powder with particles controllable |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111163880A (en) * | 2017-10-04 | 2020-05-15 | Ｊｘ金属株式会社 | Method for producing surface-treated copper fine particles |
| CN114178523A (en) * | 2017-10-04 | 2022-03-15 | Ｊｘ金属株式会社 | Method for producing surface-treated copper fine particles |
| CN114178523B (en) * | 2017-10-04 | 2024-03-01 | Ｊｘ金属株式会社 | Method for producing surface-treated copper microparticles |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160629 |
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| RJ01 | Rejection of invention patent application after publication |