CN101812596A - Comprehensive recycling method of waste plasma display screen - Google Patents
Comprehensive recycling method of waste plasma display screen Download PDFInfo
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- CN101812596A CN101812596A CN201010153533A CN201010153533A CN101812596A CN 101812596 A CN101812596 A CN 101812596A CN 201010153533 A CN201010153533 A CN 201010153533A CN 201010153533 A CN201010153533 A CN 201010153533A CN 101812596 A CN101812596 A CN 101812596A
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- display screen
- plasma display
- waste plasma
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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
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- 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 relates to a comprehensive recycling method of a waste plasma display screen, in particular to a method for recovering sliver in a waste plasma display screen of electric wastes. The invention aims at improving the comprehensive recycling value of the waste plasma display screen. The method comprises the following steps of: soaking a glass substrate of the waste plasma display screen by the assisting of stirring or ultrasound vibration by taking a nitric acid solution as a leaching agent; dissolving the sliver in the glass substrate of the waste plasma display screen; and separating and refining the sliver by using a traditional method, wherein the recovery rate of the sliver reaches over 95 percent. The glass substrate can be recycled in higher grade after cleaned.
Description
Technical field
The present invention relates to the recycling technology of electron wastes waste plasma display screen, particularly a kind of method that from the waste plasma display screen glass substrate, reclaims silver.
Background technology
1996, first 42 inches in the whole world, resolving power is 852 * 480, the color display capabilities reaches 1,677 ten thousand looks large-scale full color widescreen plasma TV were successfully developed in the Philip, indicate that plasm TV really enters ordinary consumer family.10 for many years, and the plasma technique of display has obtained significant progress, and the application of plasma TV is very general.2008, global plasma TV year sales volume reached 1,510 ten thousand.
Plasma panel mainly is made of header board and back two parts of plate, header board is the one side near the user, comprises front glass substrate, ITO electrode, Bus electrode (Bus-Electrode), front medium layer (Dielectric Layer), MgO film (MgO Thin Film).Back plate includes phosphor powder layer (Phosphor Layer), barrier (Barrier Rib), back medium layer (Dielectric Layer), Add electrode (Address Electrode), back glass substrate (Glass Substrate).Bus electrode and Add electrode in the PDP display are to contain silver electrode.
Because end of life or update need, increasing plasma TV goes out of use.In addition, in the production process of PDP display, nearly 5% PDP display can be scrapped.According to 1,510 ten thousand shipment amount estimations of global plasma in 2008, the PDP display of scrapping is above 750,000.In plasma panel, the proportion of glass substrate surpasses 90%, at present, often is taken as cullet after PDP display is discarded and disposes.
Consider from the angle of environment protection and resource reutilization, need reclaim the depleted plasma TV.About argentiferous 15 grams of the PDP display that a slice is 42 inches, its recovery value is far longer than the glass substrate of quality proportion 90%.But owing to contain multilayer coatingn is arranged on the silver electrode, could reclaim containing silver electrode after these covertures need being removed.
Therefore, be badly in need of the especially recovery technology of PDP display of research and development plasma TV, the recycling that improves waste plasma display screen is worth.
Summary of the invention
Technical problem to be solved by this invention is for the recycling that improves waste plasma display screen is worth, and a kind of method that reclaims silver from the waste plasma display screen glass substrate is provided.
The technical scheme that addresses the above problem is: be leaching agent with the salpeter solution, the front or rear panel of waste plasma display screen are soaked, silver contained in the waste plasma display screen is dissolved out, separate and refine silver by traditional method.Front and back glass substrate or back glass substrate can obtain more high-grade reuse after cleaning.
Wherein, the concentration of salpeter solution is with volume ratio, and nitric acid: water=1: 1～10 are good.Excessive concentration has oxynitride and overflows, and leaching time is longer.Concentration is low excessively, and leaching time is long and contain silver electrode and can not dissolve fast and enter solution, the rate of recovery of influence silver.
The preferred concentration of nitric acid is volume ratio 1: 4.Test shows that the volume ratio of nitric acid is at 1: 4 o'clock, hyperacoustic down auxiliary, only need leach and silver can be dissolved fully in 5 minutes.
With the salpeter solution is leaching agent, when soaking the waste plasma display screen glass substrate, needs under the static condition to soak above silver could be dissolved fully more than 72 hours.Adopt stirring or mechanical vibration can improve leaching efficiency, the time shortens to 24～36 hours.
More excellent scheme is, adopts ultrasonic activation to handle, and leaching time can shorten to 5～30 minutes.
During concrete enforcement, ultrasonic vibrator can be closed in the bottom or the sidewall of leaching groove.The total power of the ultrasonic transducer of each cubic metre leaching groove configuration is not less than 2KW.Hyperacoustic power is crossed leaching time meeting significant prolongation when hanging down.
Behind nitric acid dousing, original other material such as ITO electrode, Bus electrode, front medium layer, MgO film, phosphor powder layer, barrier (Barrier Rib), back medium layer, Add electrode all separate fully with glass substrate on the waste plasma panel glass substrate, and glass substrate can obtain more high-grade reuse after cleaning.。
The invention has the beneficial effects as follows the recovery value that improves waste plasma display screen greatly:
1, soak with nitric acid silver be dissolved out from waste plasma panel glass substrate, through traditional method separate and refining after can obtain high fine silver, can improve the recovery value of waste plasma display screen greatly.
2, behind nitric acid dousing, original ITO electrode, Bus electrode, front medium layer, MgO film, phosphor powder layer, barrier (Barrier Rib), back medium layer, Add electrode all separate fully with glass substrate on the waste plasma panel glass substrate, glass substrate no longer contains above-mentioned substance after cleaning, can obtain more high-grade reuse.
The auxiliary stirring or mechanical vibration can be shortened leaching time when 3, leaching was silver-colored.Especially apply ultrasonic wave and can significantly shorten leaching time.Test shows, with the silver on 1: 5 nitrate leaching waste plasma panel glass substrate, under static condition, needs to soak that silver could be dissolved fully more than 36 hours.Hyperacoustic down auxiliary, leaching time can shorten in 5～30 minutes.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
Below in conjunction with drawings and Examples, describe technical scheme of the present invention in detail.
The present invention is a kind of method that reclaims silver from the waste plasma display screen glass substrate, and key step comprises:
One, coarse crushing
The length of the line that the coarse crushing of argentiferous waste plasma screen front or rear panel (also can mix) is extremely any 2 is lower than 40 centimetres fragment.
Two, leaching and cleaning
Waste plasma glass substrate fragment is packed in the acid proof stainless steel basket, put into and fill nitric acid (volume ratio 1: 5～1: 2) leaching groove.
Leaching trench bottom or sidewall are provided with ultrasonic vibrator.Ultrasonic vibrator must seal to prevent the sour environment corrosion.The volume of leaching groove is according to the treatment capacity design of waste plasma glass substrate, and the total power that every cubic metre leaching groove is equipped with ultrasonic vibrator is not less than 2KW.
Open ultrasonic unit and make ultrasonic vibrator work, mention the stainless steel basket that waste plasma panel glass substrate is housed after 10 minutes, put into rinse bath 1 and rinse bath 2 cleanings twice, obtain the cullet plate.
Nitric acid in the leaching groove can soak the waste plasma glass substrate repeatedly, and the concentration of salpeter solution was low to moderate 1: 10 in the leaching groove, finished leaching.
Three, separation of Silver and refining silver
In order to reduce on the cullet plate the residual of silver, improve the rate of recovery of silver, merge the rinse water of leaching liquid, rinse bath 1 and rinse bath 2 in the leaching groove, by traditional method separation of Silver therefrom, and refining obtains high fine silver.
If treatment capacity is bigger, for reducing the filtration yield of leaching liquid, argentiferous leaching liquid need leave standstill certain hour in the leaching groove, makes the suspended substance precipitation (such as more than 8 hours) in the muddy Ag-containing solution, gets supernatant liquor and changes the transfer frame over to, and is pending.
Remaining argentiferous hangover is filtered the filtering solid matter.Filtrate is added the transfer frame, press therefrom separation of Silver of traditional method in the lump with pending supernatant liquor, and refining obtains high fine silver.
Embodiment 1 adopts the inventive method to handle the back plate of waste plasma display screen
The leaching groove is set, and specification is 2 cubic metres.Ultrasonic oscillator is located at the sidewall of leaching groove, and power is 4KW.
The useless PDP glass substrate that present embodiment adopts is the useless PDP screen back plate of domestic certain brand PDP factory, and its theoretical silver content is 0.25%, and quality is 57.0476Kg.
Referring to Fig. 1, reclaim contained silver in the waste plasma panel glass substrate as follows:
One, with after the back plate coarse crushing of argentiferous waste plasma screen, in the acid proof stainless steel basket of packing into, puts into the leaching groove that fills 1: 4 nitric acid of volume ratio.
Two, open ultrasonic unit and make ultrasonic vibrator work, mention the stainless steel basket that waste plasma panel glass substrate is housed after 10 minutes, put into rinse bath 1 and rinse bath 2 cleanings twice, obtain waste broken glass bits.
Three, rinse water is pumped into the leaching groove, to avoid the silver loss.
Four, will leach that liquid filtering obtains argentiferous liquid in the groove, be temporary in middle turn trough.
Five, wash filter residue repeatedly 2～3 times, washing fluid is filtered, the filtrate that obtains changes middle turn trough in the lump over to, to reduce the loss of silver as far as possible.
Six, with the liquid in the middle turn trough by the traditional method separation of Silver with refine silver that (concrete operations are referring to " gold and silver and platinum metals regeneration reclaim ", press of Central South University, Wang Yonglu, Liu Zhenghua write), obtaining purity is 99.2% silver ingot 138.4g, the rate of recovery of silver reaches 96.26%.
Embodiment 2 adopts the inventive method to handle the header board of waste plasma display screen
The leaching groove is set, and specification is 1 cubic metre.Ultrasonic oscillator is located at the sidewall of leaching groove, and power is 2KW.
The useless PDP glass substrate that present embodiment adopts is the useless PDP screen header board of domestic certain brand PDP factory, and its theoretical silver content is 0.17%, and quality is 56.2331Kg.
Referring to Fig. 1, reclaim contained silver in the waste plasma panel glass substrate as follows:
One, with after the back plate coarse crushing of argentiferous waste plasma screen, in the acid proof stainless steel basket of packing into, puts into the leaching groove that fills 1: 4 nitric acid of volume ratio.
Two, open ultrasonic unit and make ultrasonic vibrator work, mention the stainless steel basket that waste plasma panel glass substrate is housed after 10 minutes, put into rinse bath 1 and rinse bath 2 cleanings twice, obtain waste broken glass bits.
Three, rinse water is pumped into the leaching groove, to avoid the silver loss.
Four, will leach that liquid filtering obtains argentiferous liquid in the groove, be temporary in middle turn trough.
Five, wash filter residue repeatedly 2～3 times, washing fluid is filtered, the filtrate that obtains changes middle turn trough in the lump over to, to reduce the loss of silver as far as possible.
Six, with the liquid in the middle turn trough by the traditional method separation of Silver with refine silver that (concrete operations are referring to " gold and silver and platinum metals regeneration reclaim ", press of Central South University, Wang Yonglu, Liu Zhenghua write), obtaining purity is 99.46% silver ingot 91.99g, the rate of recovery of silver reaches 95.7%.
The present inventor proves that through test of many times the concentration of salpeter solution is with volume ratio, and nitric acid: water=1: 1～10 are good.Excessive concentration has oxynitride and overflows, and leaching time is longer.Concentration is low excessively, and leaching time is long and contain silver electrode and can not dissolve fast and enter solution, the rate of recovery of influence silver.Test shows that the volume ratio of nitric acid is at 1: 4 o'clock, hyperacoustic down auxiliary, only need leach and silver can be dissolved fully in 5-10 minute.
Claims (6)
1. the recoverying and utilizing method of waste plasma display screen is characterized in that being finished by following steps:
A, the front or rear panel that adopt salpeter solution to soak argentiferous waste plasma display screen are dissolved out wherein contained silver;
B, the solution after a step soaked separate by traditional method and refine silver, and obtain high fine silver.
2. the comprehensive reutilization method of waste plasma display screen according to claim 1 is characterized in that: the concentration of the described salpeter solution of step a is in volume ratio, nitric acid: water=1: 1～10.
3. the comprehensive reutilization method of waste plasma display screen according to claim 2 is characterized in that: the concentration of described salpeter solution is in volume ratio, nitric acid: water=1: 4.
4. according to the comprehensive reutilization method of the described waste plasma display screen of claim 1～3, it is characterized in that: when step a adopts salpeter solution to soak, stir or mechanical vibration, soak time is 24-36 hour.
5. according to the comprehensive reutilization method of the described waste plasma display screen of claim 1～3, it is characterized in that: when step a adopts salpeter solution to soak, adopt ultrasonic activation to handle leaching time 5-30 minute.
6. the comprehensive reutilization method of waste plasma display screen according to claim 5 is characterized in that: the total power of the ultrasonic transducer of each cubic metre leaching groove configuration is not less than 2KW.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201010153533A CN101812596A (en) | 2010-04-23 | 2010-04-23 | Comprehensive recycling method of waste plasma display screen |
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| CN201010153533A CN101812596A (en) | 2010-04-23 | 2010-04-23 | Comprehensive recycling method of waste plasma display screen |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031378A (en) * | 2010-12-01 | 2011-04-27 | 西南科技大学 | Method for recovering metal silver from waste plasma display panel (PDP) glass plate |
| CN102925696A (en) * | 2012-10-29 | 2013-02-13 | 四川长虹电器股份有限公司 | Comprehensive recycling method of waste plasma screen |
| CN111570485A (en) * | 2020-05-28 | 2020-08-25 | 王小娟 | Optical mirror processing device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316094A (en) * | 1998-09-09 | 2001-10-03 | 佳能株式会社 | Image display, method for disassembling same, and method for recovering part |
| JP2005334838A (en) * | 2004-05-31 | 2005-12-08 | Hitachi Zosen Corp | Recycling system for valuable metal |
| CN1870207A (en) * | 1998-09-09 | 2006-11-29 | 佳能株式会社 | Image display apparatus, disassembly processing method therefor, and component recovery method |
| JP2007031748A (en) * | 2005-07-25 | 2007-02-08 | Stella Chemifa Corp | Method for recovering silver and method for recycling silver compound |
| JP2009185389A (en) * | 2009-05-11 | 2009-08-20 | Hitachi Zosen Corp | Recycling method for valuable metal |
-
2010
- 2010-04-23 CN CN201010153533A patent/CN101812596A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1316094A (en) * | 1998-09-09 | 2001-10-03 | 佳能株式会社 | Image display, method for disassembling same, and method for recovering part |
| CN1444244A (en) * | 1998-09-09 | 2003-09-24 | 佳能株式会社 | Image display device and dissection processing method and element recovery method |
| CN1870207A (en) * | 1998-09-09 | 2006-11-29 | 佳能株式会社 | Image display apparatus, disassembly processing method therefor, and component recovery method |
| JP2005334838A (en) * | 2004-05-31 | 2005-12-08 | Hitachi Zosen Corp | Recycling system for valuable metal |
| JP2007031748A (en) * | 2005-07-25 | 2007-02-08 | Stella Chemifa Corp | Method for recovering silver and method for recycling silver compound |
| JP2009185389A (en) * | 2009-05-11 | 2009-08-20 | Hitachi Zosen Corp | Recycling method for valuable metal |
Non-Patent Citations (2)
| Title |
|---|
| 《上海有色金属》 20030930 陈世琯 超声波在湿法冶金中的应用 142-146 5-6 第24卷, 第3期 * |
| 《湿法冶金》 20010930 张斌等 超声波在湿法冶金中的应用进展 第114页第2.4节 5-6 第20卷, 第3期 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102031378A (en) * | 2010-12-01 | 2011-04-27 | 西南科技大学 | Method for recovering metal silver from waste plasma display panel (PDP) glass plate |
| CN102925696A (en) * | 2012-10-29 | 2013-02-13 | 四川长虹电器股份有限公司 | Comprehensive recycling method of waste plasma screen |
| CN111570485A (en) * | 2020-05-28 | 2020-08-25 | 王小娟 | Optical mirror processing device |
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Application publication date: 20100825 |