CN105694843A - Phosphor recovering treatment technology - Google Patents
Phosphor recovering treatment technology Download PDFInfo
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- CN105694843A CN105694843A CN201410693000.4A CN201410693000A CN105694843A CN 105694843 A CN105694843 A CN 105694843A CN 201410693000 A CN201410693000 A CN 201410693000A CN 105694843 A CN105694843 A CN 105694843A
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- fluorescent material
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
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Abstract
The invention relates to a phosphor recovering treatment technology. The technology comprises the following steps: removing impurities from original recovered phosphor, adding 80-90DEG C water and a dispersant, stirring, centrifuging and dehydrating the obtained stirred phosphor slurry, drying the dehydrated phosphor slurry, carrying out dry sieving, and carrying out low temperature calcination to obtain phosphor for reuse. Compared with the prior art, the phosphor recovering treatment technology has the advantages of simple operating steps, realization of use of treated phosphor as new phosphor, good performances of the phosphor, and effective solving of the problem of yellowish color of untreated phosphor.
Description
Technical field
The present invention relates to the Material Field of recycling electricity-saving lamp, in particular to a kind of fluorescent material recovery processing technique。
Background technology
Along with the enhancing of environmental consciousness, of today all beginning at home advocates " green illumination ", and people start to respond energy-conservation call from personally。" green illumination " refers to the Lighting Design by science, the electric lighting product of employing efficiency height, life-span length, safety and stable performance, improves and improves people's work, study, the condition lived and quality。According to relevant investigation and analysis, when keeping illuminance constant, as long as the electric filament lamp of 40 watts is changed into 13 watts of electricity-saving lamps of a same brightness by each family, just can reduce by the electric consumption on lighting of 10%。Effective due to electricity-saving lamp, quality improves rapidly, country using it as giving priority to energy-conserving product, carry out promoting and using。
Fluorescent tube is the important component part of electricity-saving lamp, and what the quality of fluorescent tube was mainly determined by the quality of the powder of the inside。Generally adopt rare-earth trichromatic fluorescent powder at present, generally by Y2O3: Eu (Hydrargyri Oxydum Rubrum), CeMgAl11O19: Tb (green powder) and BaMgAl11O17: Eu, Mn (blue powder) etc. form, complicated component, as without suitable process, the production in electricity-saving lamp cannot be re-applied as luminescent material, therefore present stage, the recycling of electricity-saving lamp focuses primarily upon lamp itself and the recycling of fluorescent material rare earth elements, also easily causes secondary pollution in the removal process of this rare earth element。
Claiming according to official's data, lamp phosphor consumption accounts for about the 7% of total amount of rare earth, and our current mass-produced electricity-saving lamp is exactly one of them important component part。In rare-earth trichromatic fluorescent powder maximum when Hydrargyri Oxydum Rubrum and green powder middle rare earth materials'use, the rare earth oxide in Hydrargyri Oxydum Rubrum lists 100% substantially, and green powder middle rare earth also reaches 72%, and mainly germanium oxide in blue powder, what play is excitation。So as electricity-saving lamp manufacturing enterprise, the consumption of rare earth resources is very big, but at present, country goes into overdrive the management and control to rare earth material, cause rare-earth trichromatic fluorescent powder price higher, through statistics when fluorescent material price is higher, three primary colors fluorescent powder has accounted for about the 50% of an electricity-saving lamp material cost price, all considers to save, recycle and reuse problem to better control all of electricity-saving lamp manufacturing enterprise of production cost。
Such as the CN101150032 a kind of method disclosing recovering and processing discarded fluorescent lamp, including the cutting of fluorescent lamp, the recovery of hydrargyrum, the fire concentrate of the rare earth element in the recovery of lamp holder metal and fluorescent RE powder reclaims。But it is not involved with the direct reclaiming of fluorescent material。
CN100577830C discloses a kind of method reclaiming rare earth element in waste florescent lamps, it is characterized in that with the melted fluorescent material of highly basic, then with acid-soluble solution insoluble matter, again with extracting, the methods such as co-precipitation, reclaim various valuable metal element, are also the direct reclaimings being not involved with fluorescent RE powder。
The composition of LED fluorescent material is relatively simple, generally again can be applied to the manufacture of LED as luminescent material through simple process。As CN101649197 discloses a kind of method reclaiming fluorescent powders of light emitting diode, mainly by solvent clean and dry method regeneration fluorescent powders of light emitting diode, it does not have relate to the recycling of fluorescent-lamp-use fluorescent RE powder。
Hydrargyrum in LCD fluorescent material has been carried out pyrogenic process recovery by Samsung Electronics patent WO2005064637-A1, Japan Patent JP2005096821-A, the disintegrating apparatus that JP2005132551-A is discarded fluorescent lamp respectively has carried out research etc., most patent is concentrated mainly on the recovery of light source, and shorter mention is to the direct reclaiming of fluorescent material。
Also have the CN101150032 a kind of method disclosing recovering and processing discarded fluorescent lamp, the safety cutting of discarded fluorescent lamp is reclaimed gaseous mercury；The hydrargyrum of aluminum cap, pyrite bolt, the recovery of filament metal and attachment reclaims, in loose fluorescent material the recovery of hydrargyrum and the recovery of fluorescent material rare earth elements and other valuable elements with separate, be not directed to waste phosphor powder and directly recycle。
The above recovery method no doubt can reclaim a part of resource, but its synthetical recovery is relatively costly。
Summary of the invention
It is an object of the invention to provide a kind of fluorescent material recovery processing technique, to solve the bad powder before roasted tube and to wipe lower useless fluorescent material before roasted tube and directly recycle, and the problem that effectively solution fluorescent material easily turns yellow。
A kind of fluorescent material recovery processing technique, including: after fluorescent material roguing being reclaimed, add 80 DEG C～90 DEG C water and dispersant stirring, the phosphor slurry centrifuge dehydration stirred, dry, dry screen, low temperature calcination, it is thus achieved that recycling recovery fluorescent material；
The adding proportion that described recovery fluorescent material and temperature are 80 DEG C～90 DEG C of water is weight ratio 1:1, and the adding proportion of dispersant and fluorescent material is 6～8ml:1Kg；The time of described stirring is 4～6 hours；
Described stepped low temperature calcination is through 600 DEG C of temperature below calcinations 5～6 hours。
Fluorescent material recovery processing technique as above, preferably, described stepped low temperature calcination is the calcination sequentially passing through 390 DEG C～410 DEG C, 440 DEG C～460 DEG C, 470 DEG C～490 DEG C, 540 DEG C～560 DEG C, 510 DEG C～530 DEG C, 450 DEG C～470 DEG C of six warm areas, wherein each calcination 10min under each temperature range, after equipment continuous running 5～6 hours, it is thus achieved that low temperature calcination processes recycling recovery fluorescent material later。
Fluorescent material recovery processing technique as above, it is preferable that described recovery powder roguing, refers to that fluorescent material removes big foreign material with 150 mesh filter screen screenings。
Fluorescent material recovery processing technique as above, it is preferable that the baking temperature of described drying 160～180 DEG C, drying time is 6 hours。
Fluorescent material recovery processing technique as above, it is preferable that described dry screen refers to that the fluorescent material after drying is through 150 mesh sieves。
Fluorescent material recovery processing technique as above, it is preferable that described be placed in ceramic disk by drying the fluorescent material that sieves in low temperature calcination process, does not place fluorescent material in the middle of dish。
Fluorescent material recovery processing technique as above, it is preferable that described recovery fluorescent material exist impurity more time, before described drying, repeat add 90 DEG C of water and dispersant stirring, centrifuge dehydration step, the water stirred to end is till clear water。
Fluorescent material recovery processing technique as above, it is preferable that concrete steps include:
(1), needing recovery fluorescence dry powder to be processed to remove big foreign material with 150 mesh filter screen screenings；
(2), add according to the ratio that weight ratio is 1:1 needing processing to be filtered dry the clean powder that reclaims with the warm water of 90 DEG C, put into the container adding dispersant and be stirred；The addition of described dispersant and the ratio of fluorescent material are 6～8ml:1Kg；Mixing time is 4～6 hours；
(3) phosphor slurry after, above-mentioned steps (2) being stirred is put into centrifuge and is centrifuged dehydration and unnecessary impurity；
(4), (2)-(4) step is repeated, being clear water to the water stirred；
(5), to being stirred the complete powder of centrifuge dehydration putting into stainless steel disc and will dry, baking temperature 160～180 DEG C, drying time is 6 hours；
(6), dried fluorescent material is crossed 150 mesh sieves；
(7), the fluorescent powder sieved is loaded in ceramic disk, sabot quality 1.2～1.5kg, and in the middle of dish, reserve the sky of a diameter 20～25mm；
(8), the fluorescent material of above-mentioned sabot put into temperature reached design temperature and have in the burner hearth push pedal of 400,450,480,550,460 totally six warm area high temperature reduction furnaces, wherein, within 10 minutes, advance successively according to each warm area calcination, after equipment continuous running 5～6 hours, it is thus achieved that low temperature calcination processes recycling recovery fluorescent material later。
A kind of fluorescent material recovery processing technique provided by the invention, compared with prior art, operating procedure is simple, and the fluorescent material after process can use as new powder, functional, and effectively solution processes the problem that front fluorescent material color is partially yellow。
The fluorescent material recovery processing technique of the present invention adopts the low temperature calcination lower than 600 DEG C, it is absent from destroying product situation, and carry out calcination with 6 warm areas, can effectively remove impurity in fluorescent material to decompose and solid state reaction process, impurity is enable effectively to decompose, and excluded by high temperature, and recycling cost is low；Owing to heat preservation zone is many, making temperature homogeneity excellent, product quality reaches stable homogeneous, be prevented effectively from because of in the higher destruction fluorescent material of calcination temperature activator and rare earth granularity thus the problem that causes luminous efficiency to reduce；The warm area arranged is reasonable, makes ceramic disk and push pedal have a process that gradually heat is gradually cold, is absent from thermal shock phenomenon, extends its service life longer。
Detailed description of the invention
Fluorescent material under the present invention is directed to the bad powder before roasted tube and wiping before roasted tube, the useless fluorescent material produced in the production processes such as color Huang partially is also had to carry out the process of recycling, process technique includes: after former recovery fluorescent material roguing, add water and dispersant stirring that temperature is 80 DEG C～90 DEG C, the phosphor slurry centrifuge dehydration stirred, dries, dry screen, low temperature calcination, it is thus achieved that recycling fluorescent material；The adding proportion of described recovery fluorescent material and 90 DEG C of water is weight ratio 1:1, and the adding proportion of dispersant and fluorescent material is 6～8ml:1Kg；The time of described stirring is 4～6 hours；Described low temperature calcination is the calcination sequentially passing through 390 DEG C～410 DEG C, 440 DEG C～460 DEG C, 470 DEG C～490 DEG C, 540 DEG C～560 DEG C, 510 DEG C～530 DEG C, 450 DEG C～470 DEG C of six warm areas, wherein each calcination 10min under each temperature range, finally close temperature reduction furnace outlet, start the time put above equipment and produce the burner hearth time from the fluorescent material that reclaims installed to completing temperature calcination, after equipment continuous running 5～6 hours, recycling fluorescent material can be obtained。
The present invention is by six warm areas, steps up temperature and carries out uniform low-temperature calcination, reaches to remove the foreign material reclaimed in fluorescent material, and a few warm area cannot realize, and is realized by the temperature of low-high-low。
The following examples, are used for further illustrating and describing the present invention, but are not meant to present invention is limited only to this。In embodiment, value is the arbitrary concrete numerical value of scope of the present invention, is and can implement。
Wherein, dispersant used adopts the Britain CIBA DISPEXA40 produced, and its active ingredient is the ammonium salt of polymers of carboxylic acid, proportion: 1.16 grams per milliliters；High temperature reduction furnace can adopt GMY-180-17 Si-Mo rod high temperature single hole push-plate type tunnel cave。
Embodiment 1
A kind of fluorescent material recovery processing technique, specifically includes following steps:
(1), needing recovery fluorescence dry powder to be processed to remove big foreign material with 150 mesh filter screen screenings, it is placed in clean container；
(2), choose clean container addition dispersant, be 8ml/Kg with the adding proportion of fluorescent material；
(3), with the pure water that temperature is 90 DEG C, it is the ratio of 1:1 needing processing to be filtered dry the clean powder that reclaims according to weight ratio, puts into the container adding dispersant and be stirred；Warm water can adopt the use sub-pure water of degranulation；Mixing time is 4-6 hour；
(4) phosphor slurry, stirred is put into centrifuge and is centrifuged dehydration and removes unnecessary impurity；
(5), fluorescent material that impurity is relatively many can repeat (2)-(4) step, the water stirred to end is till clear water；
(6), to being stirred the complete powder of centrifuge dehydration putting into stainless steel disc and will dry, baking temperature 160-180 DEG C, drying time is 6 hours；
(7), dried fluorescent material is crossed 150 mesh sieves；
(8) opening high temperature reduction furnace, in advance to carry out preheating and heat, the design temperature of high temperature reduction furnace is as follows；
(9), in the fluorescent powder loading ready ceramic disk in advance that in step (7), drying has been sieved, sabot quality 1.2～1.5kg, and at the sky of the middle reserved diameter 20～25mm of the dish installed, be beneficial to fluorescent powder and be fully heated evenly；
(10), treat that the design temperature of high temperature reduction furnace reaches after, in advance sabot uniformly put into above high temperature furnace burner hearth push pedal, by the propelling of each warm area 10 of T1 to T6 minute/time；
(11), T7 close outlet exactly, after equipment continuous running 5～6 hours, bleach through the powder body color of high temperature reduction furnace low temperature calcination, it is thus achieved that the fluorescent material of recycling。
Embodiment 1 is handled well fluorescent material test diameter of particle, illumination and correlated color temperature, and with the contrast test result of normal brand-new fluorescent material in Table 1, being can be seen that by data in table 1, the recovery powder that the present invention a kind of fluorescent material recovery processing technique processes has good use feature。
Table 1
| Colour temperature (K) | X | Y | Light efficiency (lm/w) | Luminous flux (lm) | |
| Embodiment 1 | 5748 | 0.3268 | 0.3428 | 63.28 | 520.05 |
| Brand-new fluorescent material | 6642 | 0.3092 | 0.3354 | 62.22 | 498.14 |
Claims (8)
1. a fluorescent material recovery processing technique, including: after fluorescent material roguing being reclaimed, add water and dispersant stirring that temperature is 80 DEG C～90 DEG C, the phosphor slurry centrifuge dehydration stirred, dries, dry screen, stepped low temperature calcination, it is thus achieved that recycling recovery fluorescent material；
The adding proportion that described recovery fluorescent material and temperature are the water of 80 DEG C～90 DEG C is weight ratio 1:1, and the adding proportion of dispersant and fluorescent material is 6～8ml:1Kg；The time of described stirring is 4～6 hours；
Described stepped low temperature calcination is through 600 DEG C of temperature below calcinations 5～6 hours。
2. fluorescent material recovery processing technique as claimed in claim 1, it is characterized in that, described stepped low temperature calcination is successively through the calcination of 390 DEG C～410 DEG C, 440 DEG C～460 DEG C, 470 DEG C～490 DEG C, 540 DEG C～560 DEG C, 510 DEG C～530 DEG C, 450 DEG C～470 DEG C of six warm areas, wherein each calcination 10min under each temperature range, after equipment continuous running 5～6 hours, it is thus achieved that low temperature calcination processes recycling recovery fluorescent material later。
3. fluorescent material recovery processing technique as claimed in claim 1, it is characterised in that described recovery powder roguing, refers to that fluorescent material removes big foreign material with 150 mesh filter screen screenings。
4. fluorescent material recovery processing technique as claimed in claim 1, it is characterised in that the baking temperature of described drying is 160～180 DEG C, and drying time is 6 hours。
5. fluorescent material recovery processing technique as claimed in claim 1, it is characterised in that described dry screen refers to that the fluorescent material after drying is through 150 mesh sieves。
6. fluorescent material recovery processing technique as claimed in claim 1, it is characterised in that described be placed in ceramic disk by drying the fluorescent material sieved in low temperature calcination process, wherein, does not place fluorescent material in the middle of in described ceramic disk。
7. fluorescent material recovery processing technique as claimed in claim 1, it is characterized in that, described recovery fluorescent material exist impurity more time, before described drying, repeating to add 80 DEG C～90 DEG C water and dispersant stirring, centrifuge dehydration step, the water stirred to end is till clear water。
8. fluorescent material recovery processing technique as claimed in claim 1, it is characterised in that concrete steps include:
(1), needing recovery fluorescence dry powder to be processed to remove big foreign material with 150 mesh filter screen screenings；
(2), add according to the ratio that weight ratio is 1:1 needing processing to be filtered dry the clean powder that reclaims with the warm water of 90 DEG C, put into the container adding dispersant and be stirred；The addition of described dispersant and the ratio of fluorescent material are 6～8ml:1Kg；Mixing time is 4～6 hours；
(3) phosphor slurry after, above-mentioned steps (2) being stirred is put into centrifuge and is centrifuged dehydration and unnecessary impurity；
(4), (2)-(4) step is repeated, being clear water to the water stirred；
(5), to being stirred the complete powder of centrifuge dehydration putting into stainless steel disc and will dry, baking temperature 160～180 DEG C, drying time is 6 hours；
(6), dried fluorescent material is crossed 150 mesh sieves；
(7), the fluorescent powder sieved is loaded in ceramic disk, sabot quality 1.2～1.5kg, and in the middle of dish, reserve the sky of a diameter 20～25mm；
(8), the fluorescent material of above-mentioned sabot put into temperature reached design temperature and have in the burner hearth push pedal of 400 DEG C, 450 DEG C, 480 DEG C, 550 DEG C, 460 DEG C, 600 DEG C totally six warm area high temperature reduction furnaces, wherein, within 10 minutes, advance successively according to each warm area calcination, after equipment continuous running 5～6 hours, it is thus achieved that low temperature calcination processes recycling recovery fluorescent material later。
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| CN201410693000.4A CN105694843A (en) | 2014-11-25 | 2014-11-25 | Phosphor recovering treatment technology |
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| CN201410693000.4A CN105694843A (en) | 2014-11-25 | 2014-11-25 | Phosphor recovering treatment technology |
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| CN105694843A true CN105694843A (en) | 2016-06-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108276984A (en) * | 2018-01-17 | 2018-07-13 | 浙江江山三友电子有限公司 | A kind of rare-earth trichromatic fluorescent powder recycling powder rinsing process |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5242555B2 (en) * | 1975-04-24 | 1977-10-25 | ||
| CN1193178A (en) * | 1997-02-07 | 1998-09-16 | 株式会社东芝 | Method for regenerating fluorophor and regenerating device |
| CN101018840A (en) * | 2005-04-01 | 2007-08-15 | 松下电器产业株式会社 | Method for regenerating fluorescent material and fluorescent lamp |
| CN101200638A (en) * | 2007-11-30 | 2008-06-18 | 彩虹集团电子股份有限公司 | Regeneration method of phosphor for rear earth three primary colors lamp |
| CN101565617A (en) * | 2009-06-01 | 2009-10-28 | 彩虹集团电子股份有限公司 | Method for regenerating UV excitation rare-earth phosphor |
| CN101942298A (en) * | 2010-09-29 | 2011-01-12 | 江门市科恒实业股份有限公司 | Method for regenerating rare earth trichromatic fluorescent powder for lamp |
-
2014
- 2014-11-25 CN CN201410693000.4A patent/CN105694843A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5242555B2 (en) * | 1975-04-24 | 1977-10-25 | ||
| CN1193178A (en) * | 1997-02-07 | 1998-09-16 | 株式会社东芝 | Method for regenerating fluorophor and regenerating device |
| CN101018840A (en) * | 2005-04-01 | 2007-08-15 | 松下电器产业株式会社 | Method for regenerating fluorescent material and fluorescent lamp |
| CN101200638A (en) * | 2007-11-30 | 2008-06-18 | 彩虹集团电子股份有限公司 | Regeneration method of phosphor for rear earth three primary colors lamp |
| CN101565617A (en) * | 2009-06-01 | 2009-10-28 | 彩虹集团电子股份有限公司 | Method for regenerating UV excitation rare-earth phosphor |
| CN101942298A (en) * | 2010-09-29 | 2011-01-12 | 江门市科恒实业股份有限公司 | Method for regenerating rare earth trichromatic fluorescent powder for lamp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108276984A (en) * | 2018-01-17 | 2018-07-13 | 浙江江山三友电子有限公司 | A kind of rare-earth trichromatic fluorescent powder recycling powder rinsing process |
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Application publication date: 20160622 |