CN106801143A - A kind of method for reclaiming waste and old solar panel silver - Google Patents
A kind of method for reclaiming waste and old solar panel silver Download PDFInfo
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- CN106801143A CN106801143A CN201710047337.1A CN201710047337A CN106801143A CN 106801143 A CN106801143 A CN 106801143A CN 201710047337 A CN201710047337 A CN 201710047337A CN 106801143 A CN106801143 A CN 106801143A
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- silver
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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
- C22B7/006—Wet processes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/02—Silicon
- C01B33/037—Purification
-
- 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
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
- C22B11/046—Recovery of noble metals from waste materials from manufactured products, e.g. from printed circuit boards, from photographic films, paper or baths
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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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention belongs to technical field of waste recovery, and in particular to a kind of method of the waste and old solar panel silver of recovery, comprise the following steps：A, take waste and old solar battery chip；B, the battery chip is soaked using sodium hydroxide solution, remove the aluminium lamination in the aluminium back surface field of the chip, obtained except the silicon chip after aluminium；C, the silicon chip except after aluminium is processed with the mixed solution of nitrite and copper sulphate, leach the silver on the pole plate of the aluminium flake, obtain carrying the battery chip after silver；D, the battery chip that will be carried after silver soak in being put into hydrofluoric acid solution, obtain silicon material.The method of the invention can be effectively to waste and old crystal silicon solar chip valuable constituent carry out renewable resources treatment, effects of energy conservation and environmental protection is good, the method can not only be collected into the silver of recovery, moreover it is possible to the silicon material of high-purity be obtained by post processing, with great economic results in society.
Description
Technical field
The invention belongs to technical field of waste recovery, and in particular to one kind is carried out reclaiming the waste and old sun with nitrite solution
Can the silver-colored method of cell panel.
Background technology
Crystal silicon solar is popularized, with people since last century the nineties as one kind of green energy resource in the whole world
Pay attention to environmental protection the reinforcement of dynamics, crystal silicon solar industry is even more and obtains fast development.However, solar power station
Life cycle is generally 20-25, and when transformation efficiency is reduced to a certain extent, battery failure is, it is necessary to scrap renewal；In addition,
Can also be produced in battery, battery component production, photovoltaic plant maintenance process and largely scrap component.It is expected from after the year two thousand twenty,
The solid waste of the solar panel of the whole world and China occurs and increases substantially that accumulative discarded amount also can gradually increase,
The treatment disposal and the recycling of valuable constituent of waste and old solar panel when the time comes will turn into an important environmental protection subject.
On the other hand, a large amount of battery waste products can be produced in crystal silicon solar energy battery plate production process, it is reclaimed
Using can with reduces cost, particularly realize aborning valuable constituent reusable edible and waste discharge recycle have it is great
Economic worth and environmental and ecological benefit.
But, using extremely toxic substances such as strong acid or cyanide such as nitric acid or chloroazotic acid in existing silver impregnation technique, it is to operation ring
Border, wastewater treatment etc. have a significant impact.
The content of the invention
Therefore, the technical problems to be solved by the invention are the bottleneck for overcoming prior art, so as to propose that one kind is sub-
Nitrate solution carries out the method for reclaiming waste and old solar panel silver.
In order to solve the above technical problems, the invention discloses a kind of method for reclaiming waste and old solar panel silver, it is described
Method is comprised the following steps：
A, take waste and old solar battery chip；
B, the battery chip is soaked using sodium hydroxide solution, remove the aluminium lamination in the aluminium back surface field of the chip, obtained
Except the silicon chip after aluminium；
C, the silicon chip except after aluminium is processed with the mixed solution of nitrite and copper sulphate, leach the aluminium flake
Pole plate on silver, obtain carrying the battery chip after silver；
D, the battery chip carried after silver is put into hydrofluoric acid solution and soaked, obtain silicon material.
Preferably, chip described in the step b and the solid-liquid mass ratio of sodium hydroxide solution are 1：6~1：3.
Preferably, the nitrite in the step c and the nitrite in the mixed solution of copper sulphate are natrium nitrosum,
Concentration is 0.5~2m/L.
Preferably, the copper sulphate in the mixed solution of the nitrite in the step c and copper sulphate, concentration is 0.05~
0.3m/L。
Preferably, the concentration of sodium hydroxide solution is 20%~40% in the step b
Preferably, the concentration of hydrofluoric acid solution described in the step d is 5~40%.
Preferably, in the step c pH value of solution between 3~6, carry silver leaching reaction temperature be 30 DEG C~70
DEG C, the reaction time is 0.5~7 hour.
Preferably, the soak time of the step b is 0.5~3 hour.
Preferably, soak removal in the step d is impurity oxygen SiClx.
It is more highly preferred to, the waste and old solar battery chip in the step a is to disassemble mode and sorting by machinery
What the method for the treatment of was obtained.
Above-mentioned technical proposal of the invention has advantages below compared to existing technology：The method of the invention can be effectively
Valuable constituent to waste and old crystal silicon solar chip carries out renewable resources treatment, and effects of energy conservation and environmental protection is good, and the method not only may be used
To be collected into the silver of recovery, moreover it is possible to the silicon material of high-purity is obtained by post processing, with great economic results in society.
Specific embodiment
Embodiment 1 present embodiment discloses a kind of method for reclaiming waste and old solar panel silver, methods described include with
Lower step：
The waste and old solar components of 2000W are disassembled by machinery, cracking and sorting can obtain aluminium 20kg, copper 1kg, plastics
34kg, ultra-clear glasses 100kg, by after flushing again by crystal-silicon solar cell chip chemical Treatment；Chemical Treatment mistake
Journey is as follows：By solar cell chip solid-to-liquid ratio be 1：4, concentration be in 30% strong base solution NaOH immersion until aluminium back surface field
Remove completely, the time is that 0.5h (is 2Al+2NaOH+2H with the reaction equation of highly basic2O=2NaAlO2+3H2↑)；Then again will
In mixed solution system without aluminium solar cell chip input 100L nitrite-copper ion, the concentration of its Sodium Nitrite is
The concentration of 1.5m/L and copper ion is 0.2m/L, and the pH value of solution system is adjusted to 5, and is stirred under 55 DEG C of reaction temperature
Leaching makes silver dissolving for 6 hours completely, and its silver-colored rate of recovery can reach 80.1%；Then being put into without silver-colored solar cell chip
Reaction in the hydrofluoric acid solution (concentration is 25%) of 40L.The impurity such as reaction, the silicon nitride on removing silicon chip, to obtain pure silicon
Material 60kg, the silicon material rate of recovery is about 90%；The aluminium in body containing aluminium liquid is converted into aluminum oxide by separation of solid and liquid after except aluminium, is obtained about
6kg aluminum oxide, aluminium recovery is about 93%.
Embodiment 2 present embodiment discloses a kind of method for reclaiming waste and old solar panel silver, methods described include with
Lower step：
The waste and old solar components of 1000W are disassembled by machinery, cracking and sorting can obtain aluminium 20kg, copper 1kg, plastics
34kg, ultra-clear glasses 100kg, by after flushing again by crystal-silicon solar cell chip chemical Treatment；Chemical Treatment mistake
Journey is as follows：By solar cell chip solid-to-liquid ratio be 1：6, concentration be 20% NaOH strong base solution in immersion until aluminium the back of the body
Field removes completely, and the time is that 3h (is 2Al+2NaOH+2H with the reaction equation of highly basic2O=2NaAlO2+3H2↑)；Then again will
In mixed solution system without aluminium solar cell chip input 100L nitrite-copper ion, the concentration of its Sodium Nitrite is
The concentration of 2m/L and copper ion is 0.05m/L, and the pH value of solution system is adjusted to 3, and is stirred under 30 DEG C of reaction temperature
Leaching makes silver dissolving for 7 hours completely, and its silver-colored rate of recovery can reach 80.1%；Then being put into without silver-colored solar cell chip
The impurity such as reaction in the hydrofluoric acid solution (concentration is 5%) of 40L, the silicon nitride on removing silicon chip, to obtain pure silicon material 60kg,
The silicon material rate of recovery is about 90%；The aluminium in body containing aluminium liquid is converted into aluminum oxide by separation of solid and liquid after except aluminium, obtains about 6kg oxidations
Aluminium, aluminium recovery is about 92%.
Embodiment 3 present embodiment discloses a kind of method for reclaiming waste and old solar panel silver, methods described include with
Lower step：
The waste and old solar components of 2000W are disassembled by machinery, cracking and sorting can obtain aluminium 20kg, copper 1kg, plastics
34kg, ultra-clear glasses 100kg, by after flushing again by crystal-silicon solar cell chip chemical Treatment；Chemical Treatment mistake
Journey is as follows：By solar cell chip solid-to-liquid ratio be 1：4, concentration be in 40% NaOH strong base solution immersion until aluminium back surface field
Remove completely, the reaction time is that 2h (is 2Al+2NaOH+2H with the reaction equation of highly basic2O=2NaAlO2+3H2↑)；Then again
Will be without in the mixed solution system of aluminium solar cell chip input 100L nitrite-copper ion, the concentration of its Sodium Nitrite
For the concentration of 0.5m/L and copper ion is 2m/L, the pH value of solution system is adjusted to 6, and stirred under 70 DEG C of reaction temperature
Leaching makes silver dissolving for 0.5 hour completely, and its silver-colored rate of recovery can reach 80.1%；Then being put into without silver-colored solar cell chip
The impurity such as reaction in the hydrofluoric acid solution (concentration is 40%) of 40L, the silicon nitride on removing silicon chip, to obtain pure silicon material
60kg, the silicon material rate of recovery is about 90%；The aluminium in body containing aluminium liquid is converted into aluminum oxide by separation of solid and liquid after except aluminium, is obtained about
6kg aluminum oxide, aluminium recovery is about 91.8%.
Obviously, above-described embodiment is only intended to clearly illustrate example, and not to the restriction of implementation method.It is right
For those of ordinary skill in the art, can also make on the basis of the above description other multi-forms change or
Change.There is no need and unable to be exhaustive to all of implementation method.And the obvious change thus extended out or
Among changing still in the protection domain of the invention.
Claims (10)
1. it is a kind of to reclaim the silver-colored method of waste and old solar panel, it is characterised in that to the described method comprises the following steps：
A, take waste and old solar battery chip；
B, the battery chip is soaked using sodium hydroxide solution, remove the aluminium lamination in the aluminium back surface field of the chip, obtained except aluminium
Silicon chip afterwards；
C, the silicon chip except after aluminium is processed with the mixed solution of nitrite and copper sulphate, leach the pole of the aluminium flake
Silver on plate, obtains carrying the battery chip after silver；
D, the battery chip carried after silver is put into hydrofluoric acid solution and soaked, obtain silicon material.
2. according to claim 1 to reclaim the silver-colored method of the silver-colored method cell panel of waste and old solar panel, its feature exists
In chip described in the step b is 1 with the solid-liquid mass ratio of sodium hydroxide solution：6~1：3.
3. according to claim 2 to reclaim the silver-colored method of the silver-colored method cell panel of waste and old solar panel, its feature exists
Nitrite in, nitrite in the step c with the mixed solution of copper sulphate is natrium nitrosum, concentration is 0.5~
2m/L。
4. according to claim 3 to reclaim the silver-colored method of the silver-colored method cell panel of waste and old solar panel, its feature exists
Copper sulphate in, nitrite in the step c with the mixed solution of copper sulphate, concentration is 0.05~0.3m/L.
5. according to claim 4 to reclaim the silver-colored method of the silver-colored method cell panel of waste and old solar panel, its feature exists
In the concentration of sodium hydroxide solution is 20%~40% in the step b.
6. according to claim 5 to reclaim the silver-colored method of the silver-colored method cell panel of waste and old solar panel, its feature exists
In the concentration of hydrofluoric acid solution described in the step d is 5~40%.
7. according to claim 6 to reclaim the silver-colored method of the silver-colored method cell panel of waste and old solar panel, its feature exists
In the pH value of solution puies forward the reaction temperature of silver leaching for 30 DEG C~70 DEG C between 3~6 in the step c, and the reaction time is
0.5~7 hour.
8. according to claim 7 to reclaim the silver-colored method of the silver-colored method cell panel of waste and old solar panel, its feature exists
In the soak time of the step b is 0.5~3 hour.
9. according to claim 8 to reclaim the silver-colored method of the silver-colored method cell panel of waste and old solar panel, its feature exists
In soak removal in the step d is impurity oxygen SiClx.
10. according to claim 9 to reclaim the silver-colored method of the silver-colored method cell panel of waste and old solar panel, its feature exists
In the waste and old solar battery chip in the step a is that the method for disassembling mode and sorting process by machinery is obtained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710047337.1A CN106801143A (en) | 2017-01-22 | 2017-01-22 | A kind of method for reclaiming waste and old solar panel silver |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710047337.1A CN106801143A (en) | 2017-01-22 | 2017-01-22 | A kind of method for reclaiming waste and old solar panel silver |
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| CN201710047337.1A Pending CN106801143A (en) | 2017-01-22 | 2017-01-22 | A kind of method for reclaiming waste and old solar panel silver |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719043A (en) * | 2020-06-09 | 2020-09-29 | 山西潞安太阳能科技有限责任公司 | Method for recycling waste solar cell |
Citations (4)
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|---|---|---|---|---|
| US5096486A (en) * | 1990-12-13 | 1992-03-17 | Sunshine Precious Metals Incorporated | Treatment of metal bearing mineral material |
| CN103978021A (en) * | 2014-05-08 | 2014-08-13 | 刘景洋 | Waste crystalline silicon solar cell panel disassembling and recovering method |
| CN105355541A (en) * | 2015-10-23 | 2016-02-24 | 乐山新天源太阳能科技有限公司 | Solar cell recycling method |
| CN105618461A (en) * | 2015-12-31 | 2016-06-01 | 东莞珂洛赫慕电子材料科技有限公司 | Method for recycling crystalline silicon solar cell module |
-
2017
- 2017-01-22 CN CN201710047337.1A patent/CN106801143A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5096486A (en) * | 1990-12-13 | 1992-03-17 | Sunshine Precious Metals Incorporated | Treatment of metal bearing mineral material |
| CN103978021A (en) * | 2014-05-08 | 2014-08-13 | 刘景洋 | Waste crystalline silicon solar cell panel disassembling and recovering method |
| CN105355541A (en) * | 2015-10-23 | 2016-02-24 | 乐山新天源太阳能科技有限公司 | Solar cell recycling method |
| CN105618461A (en) * | 2015-12-31 | 2016-06-01 | 东莞珂洛赫慕电子材料科技有限公司 | Method for recycling crystalline silicon solar cell module |
Non-Patent Citations (3)
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| 夏士朋、徐剑峰: ""从镀银废金属中回收银的试验研究"", 《四川化工与腐蚀控制》 * |
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| 武汉大学、吉林大学等校编: "《高等学校教材 无机化学 下册（第二版）》", 31 December 1983, 高等教育出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111719043A (en) * | 2020-06-09 | 2020-09-29 | 山西潞安太阳能科技有限责任公司 | Method for recycling waste solar cell |
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Application publication date: 20170606 |