CN106734107A - A kind of its recovery method as resource of waste liquid crystal display screen panel glass - Google Patents
A kind of its recovery method as resource of waste liquid crystal display screen panel glass Download PDFInfo
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- CN106734107A CN106734107A CN201710004164.5A CN201710004164A CN106734107A CN 106734107 A CN106734107 A CN 106734107A CN 201710004164 A CN201710004164 A CN 201710004164A CN 106734107 A CN106734107 A CN 106734107A
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- liquid crystal
- crystal display
- waste liquid
- display screen
- screen panel
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
- B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
Abstract
The invention provides a kind of its recovery method as resource of waste liquid crystal display screen panel glass, waste liquid crystal display is split obtain waste liquid crystal display screen panel glass first, face glass particulate matter is obtained by crusher in crushing；Then it is mixed with a certain proportion of carbon dust, inserting carries out vacuum pyrolysis and reduction in vacuum reactor；Organic matter pyrolysis therein are that volatile matter extraction is cooled to fluid oil；There is reduction reaction in indium therein, generation simple substance indium enters pyrolysis solid product with carbon；Pyrolysis solid product is inserted in the container with agitating device, adds Medium Oil to be heated and stirred so that condensed after the fusing of simple substance indium, separated and recovered after cooling.The inventive method is simple to operation, device process is easy to control, and organic efficiency is high, it is to avoid the secondary pollution caused by wet-treating, is worthy of popularization.
Description
Technical field：
The invention belongs to secondary resource recycling field, and in particular to a kind of resource of waste liquid crystal display screen panel glass
Recovery method.
Technical background：
Liquid crystal display terminal have small volume, lightweight, low energy consumption, effect it is good, it is radiationless the characteristics of.It is mainly used in liquid
Brilliant TV, computer, monitor, smart mobile phone etc..Constantly brought forth new ideas with technology and accelerate with the speed for updating, discarded liquid crystal
Product quickly increases, how for carrying out recovery reprocessing to a little discarded liquid crystal, into extremely urgent problem.
Liquid crystal display can be divided into several parts composition, including its main functional parts-LCD, printed circuit board (PCB),
Backlight and metal edge frame.LCD includes 10-25 kind organic compounds, such as：Biphenyl, hexamethylene and cyanogen fluorine compounds,
Bromine, chlorine, etc., also including high concentration indium.
The major technique of recovery indium is divided into dry method, wet method and bioanalysis from liquid crystal display panel glass at present.Dry method
Mainly high temperature reduction method, chloride volatility process, because the indium in liquid crystal display panel glass is oxide, so high temperature reduction
Method is to utilize reducing agent under the high temperature conditions by indium oxide simple substance indium also in situ；Chloride volatility process, is logical under the high temperature conditions
Enter hydrogen chloride gas, with indium oxide reaction generation gaseous state inidum chloride, the product for obtaining indium is collected with alkali lye.Wet method is mainly molten
Agent extraction and acidleach are reclaimed.Bioanalysis is to carry out concentration and separation to indium in liquid crystal display panel glass using acclimated microorganism
Reclaim.From the point of view of from the above, there is the problem of the three wastes and high cost in wet-treating；The Biochemical method cycle is long, efficiency
It is low, it is impossible to the need for meeting commercial recovery；There is high cost, easily cause asking for secondary pollution in the chloride volatility process in dry method
Topic.
How to develop simple, efficient method and reclaim LCDs face glass, will wherein indium, glass, organic substance
Carry out being separately recovered treatment and seem extremely important.
The content of the invention：
The technical problems to be solved by the invention are to provide high useless of a kind of simple, pollution-free method, low cost, the rate of recovery
Its recovery method as resource of liquid crystal display panel glass.
A kind of its recovery method as resource of waste liquid crystal display screen panel glass of the present invention, is realized by following steps：
1) waste liquid crystal display is split and obtains waste liquid crystal display screen panel glass, panel glass is obtained by crusher in crushing
Glass particulate matter；
2) by step 1) in the face glass particulate matter that obtains mix with a certain proportion of carbon dust, then mixture is inserted very
In empty reactor, 900-1000 DEG C of pyrolysis temperature is controlled, system pressure is 20kpa, isothermal holding 30min；Waste liquid crystal display screen
Organic matter pyrolysis in face glass are volatile matter, and extraction device is cooled to liquid into condenser under vacuum suction effect
Oil；There is reduction reaction in the indium in waste liquid crystal display screen panel glass, generation simple substance indium enters pyrolysis solid product with carbon；
3) by step 2) in the pyrolysis solid product that obtains insert in the container with agitating device, add Medium Oil, make
Solid product must be pyrolyzed to be totally submerged with Medium Oil, container is then heated to 170-200 DEG C, start agitating device stirring 5-
10min, stops heating and stirs, and is filtered the product in container after after Medium Oil cooling, obtains glass dregs, indium block.
The step 1) in, the tiny particles content that described waste liquid crystal display screen panel glass is obtained after crushing is a diameter of
3-5mm。
The step 2) in, described carbon dust is the charcoal powder of a diameter of 1-3mm.
The step 2) in, described face glass particulate matter and the mass ratio of carbon dust is 2:1.
The step 2) in, described condenser chilling temperature is 0-20 DEG C.
The step 3) in, described Medium Oil is diesel oil or kerosene.
The step 3) in, described agitating device speed of agitator is 50-100rpm.
Using a kind of its recovery method as resource of waste liquid crystal display screen panel glass of above-mentioned technical proposal, the letter of its operation principle
State as follows：
The present invention mixes waste liquid crystal display screen panel glass breaking into particulate matter with carbon dust, is carried out under vacuum systems
Pyrolysis and reduction reaction, the organic cracking in waste liquid crystal display screen panel glass are small-molecule substance, form volatile matter and enter
Condenser is cooled to fluid oil；Indium oxide carries out reduction reaction with carbon in waste liquid crystal display screen panel glass, obtains simple substance indium,
Mixed with pyrolysis solid product；Then solid product will be pyrolyzed to be placed in 200 DEG C of oil, the fusing point of indium is 156.61
DEG C, in whipping process, the indium of molten condition is condensed together, and bulk is formed after cooling.After filtering separation of solid and liquid, obtain
To solid product can be that can obtain indium block by hand-sorted, other solid products are mainly glass fertile absorber, after collection
Can be used as glass regenerative raw materials.
The beneficial effects of the invention are as follows：
1st, during vacuum themal dissociation waste liquid crystal display panel glass, carbon dust is added, while real in one step
Existing two processes, organic matter is separated, then high-efficiency vacuum reduction indium oxide is simple substance indium；
2nd, the separation of the simple substance indium in solid mixture makes full use of the physical characteristic of indium low melting point, molten higher than indium in oil temperature
In the oil of point, indium is in a liquid state, and is condensed together in whipping process, and bulk is formed after cooling, it is easy to divided from solid product
Pick and obtain.
3rd, after the separated organic matter of waste liquid crystal display screen panel glass and indium after processing, can be regenerated as glass melting
Raw material, it is also possible to as road fill material etc..
4th, this method creatively proposes waste liquid crystal display screen panel glass method of resource, and raw material is simple and easy to get, side
Method is simple to operation, and device process is easy to control, can give full play to process advantage and feedstock availability, has obtained unexpected
Technique effect.
Brief description of the drawings：
Fig. 1 is a kind of process chart of its recovery method as resource of waste liquid crystal display screen panel glass.
Specific embodiment：
Embodiment 1
Waste liquid crystal display is split and obtains waste liquid crystal display screen panel glass, a diameter of 3- is obtained by crusher in crushing
The face glass particulate matter of 5mm；Then the carbon dust of 1kg face glass particulate matter 1-3mm a diameter of with 500g is mixed, is inserted true
In empty reactor, 1000 DEG C of pyrolysis temperature is controlled, system pressure is 20kpa, isothermal holding 30min；Waste liquid crystal display screen panel
Organic matter pyrolysis in glass are volatile matter, and extraction device enters condenser, the cooling of condenser under vacuum suction effect
Temperature is 20 DEG C, is cooled to fluid oil；There is reduction reaction in the indium in waste liquid crystal display screen panel glass, generate simple substance indium with carbon
Into pyrolysis solid product；Pyrolysis solid product is inserted in the container with agitating device, kerosene is added, then added container
Heat starts agitating device stirring 10min to 200 DEG C, and speed of agitator is 100rpm；Stop heating and stir, after after kerosene cooling
Product in container is filtered, glass dregs, indium block is obtained.
Embodiment 2
Waste liquid crystal display is split and obtains waste liquid crystal display screen panel glass, a diameter of 3- is obtained by crusher in crushing
The face glass particulate matter of 5mm；Then the carbon dust of 1kg face glass particulate matter 1-3mm a diameter of with 500g is mixed, is inserted true
In empty reactor, 900 DEG C of pyrolysis temperature is controlled, system pressure is 20kpa, isothermal holding 30min；Waste liquid crystal display screen panel glass
Organic matter pyrolysis in glass are volatile matter, and extraction device enters condenser, the cooling temperature of condenser under vacuum suction effect
It is 0 DEG C to spend, and is cooled to fluid oil；There is reduction reaction in the indium in waste liquid crystal display screen panel glass, generation simple substance indium enters with carbon
Enter to be pyrolyzed solid product；Pyrolysis solid product is inserted in the container with agitating device, diesel oil is added, then container is heated
To 170 DEG C, start agitating device stirring 5min, speed of agitator is 50rpm；Stop heating and stir, will hold after diesel oil is cooled down
Product in device is filtered, and obtains glass dregs, indium block.
Embodiment 3
Waste liquid crystal display is split and obtains waste liquid crystal display screen panel glass, a diameter of 3- is obtained by crusher in crushing
The face glass particulate matter of 5mm；Then the carbon dust of 1kg face glass particulate matter 1-3mm a diameter of with 500g is mixed, is inserted true
In empty reactor, 950 DEG C of pyrolysis temperature is controlled, system pressure is 20kpa, isothermal holding 30min；Waste liquid crystal display screen panel glass
Organic matter pyrolysis in glass are volatile matter, and extraction device enters condenser, the cooling temperature of condenser under vacuum suction effect
It is 10 DEG C to spend, and is cooled to fluid oil；There is reduction reaction in the indium in waste liquid crystal display screen panel glass, generation simple substance indium enters with carbon
Enter to be pyrolyzed solid product；Pyrolysis solid product is inserted in the container with agitating device, diesel oil is added, then container is heated
To 185 DEG C, start agitating device stirring 5min, speed of agitator is 50rpm；Stop heating and stir, will hold after diesel oil is cooled down
Product in device is filtered, and obtains glass dregs, indium block.
Claims (7)
1. a kind of its recovery method as resource of waste liquid crystal display screen panel glass, it is characterised in that：Comprise the following steps：
1) waste liquid crystal display is split and obtains waste liquid crystal display screen panel glass, face glass is obtained by crusher in crushing
Grain thing；
2) by step 1) in the face glass particulate matter that obtains mix with a certain proportion of carbon dust, then that mixture is inserted into vacuum is anti-
Answer in device, control 900-1000 DEG C of pyrolysis temperature, system pressure is 20kpa, isothermal holding 30min；Waste liquid crystal display screen panel
Organic matter pyrolysis in glass are volatile matter, and extraction device is cooled to fluid oil into condenser under vacuum suction effect；
There is reduction reaction in the indium in waste liquid crystal display screen panel glass, generation simple substance indium enters pyrolysis solid product with carbon；
3) by step 2) in the pyrolysis solid product that obtains insert in the container with agitating device, add Medium Oil so that heat
Solution solid product is totally submerged with Medium Oil, and container then is heated into 170-200 DEG C, starts agitating device stirring 5-
10min, stops heating and stirs, and is filtered the product in container after after Medium Oil cooling, obtains glass dregs, indium block.
2. its recovery method as resource of a kind of waste liquid crystal display screen panel glass according to claim 1, it is characterised in that：Institute
The face glass particulate matter stated is 2 with the mass ratio of carbon dust:1.
3. a kind of its recovery method as resource of waste liquid crystal display screen panel glass according to claim 1 and 2, its feature exists
In：The a diameter of 3-5mm of tiny particles content that described waste liquid crystal display screen panel glass is obtained after crushing.
4. its recovery method as resource of a kind of waste liquid crystal display screen panel glass according to claim 3, it is characterised in that：Institute
The carbon dust stated is the charcoal powder of a diameter of 1-3mm.
5. its recovery method as resource of a kind of waste liquid crystal display screen panel glass according to claim 1, it is characterised in that：Institute
The condenser chilling temperature stated is 0-20 DEG C.
6. its recovery method as resource of a kind of waste liquid crystal display screen panel glass according to claim 1, it is characterised in that：Institute
The Medium Oil stated is diesel oil or kerosene.
7. its recovery method as resource of a kind of waste liquid crystal display screen panel glass according to claim 1, it is characterised in that：Institute
The agitating device speed of agitator stated is 50-100rpm.
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| CN201710004164.5A CN106734107B (en) | 2017-01-04 | 2017-01-04 | A kind of recovery method as resource of waste liquid crystal display screen panel glass |
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| CN201710004164.5A CN106734107B (en) | 2017-01-04 | 2017-01-04 | A kind of recovery method as resource of waste liquid crystal display screen panel glass |
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| CN106734107A true CN106734107A (en) | 2017-05-31 |
| CN106734107B CN106734107B (en) | 2019-05-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109457125A (en) * | 2018-10-08 | 2019-03-12 | 上海交通大学 | The method for controlling liquid crystal and enriching and reclaiming indium that carbon pyrolysis-vacuum autoreduction separates in discarded liquid crystal display panel |
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| CN101722169A (en) * | 2009-11-20 | 2010-06-09 | 郭玉文 | Method for harmless heat treatment of waste liquid crystal display |
| CN102703707A (en) * | 2012-06-15 | 2012-10-03 | 广西金山铟锗冶金化工有限公司 | Method for recovering indium and germanium from zinc leaching residue |
| JP2013223841A (en) * | 2012-04-23 | 2013-10-31 | Sharp Corp | Recycling method of flat panel |
| CN204676134U (en) * | 2015-06-04 | 2015-09-30 | 江西龙天勇有色金属有限公司 | The production system of the rich indium raw material in a kind of indium wet method workshop |
| CN105063364A (en) * | 2015-09-02 | 2015-11-18 | 扬州宁达贵金属有限公司 | Method for recycling indium from waste liquid crystal display |
| CN105483389A (en) * | 2016-01-13 | 2016-04-13 | 云南大学 | Leaching method for indium in waste liquid crystal panel and leaching agent |
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2017
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101613802A (en) * | 2009-07-13 | 2009-12-30 | 中国科学院生态环境研究中心 | The technology of reclaiming lead and producing environment-friendly building material by waste flint glass and support equipment |
| CN101722169A (en) * | 2009-11-20 | 2010-06-09 | 郭玉文 | Method for harmless heat treatment of waste liquid crystal display |
| JP2013223841A (en) * | 2012-04-23 | 2013-10-31 | Sharp Corp | Recycling method of flat panel |
| CN102703707A (en) * | 2012-06-15 | 2012-10-03 | 广西金山铟锗冶金化工有限公司 | Method for recovering indium and germanium from zinc leaching residue |
| CN204676134U (en) * | 2015-06-04 | 2015-09-30 | 江西龙天勇有色金属有限公司 | The production system of the rich indium raw material in a kind of indium wet method workshop |
| CN105063364A (en) * | 2015-09-02 | 2015-11-18 | 扬州宁达贵金属有限公司 | Method for recycling indium from waste liquid crystal display |
| CN105483389A (en) * | 2016-01-13 | 2016-04-13 | 云南大学 | Leaching method for indium in waste liquid crystal panel and leaching agent |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109457125A (en) * | 2018-10-08 | 2019-03-12 | 上海交通大学 | The method for controlling liquid crystal and enriching and reclaiming indium that carbon pyrolysis-vacuum autoreduction separates in discarded liquid crystal display panel |
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| CN106734107B (en) | 2019-05-21 |
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Effective date of registration: 20190424 Address after: 517000 Building E of Xionghua Science and Technology Park, No. 1 Xingye Avenue, Heyuan High-tech Zone, Guangdong Province Applicant after: Heyuan Longxin Optical Technology Co., Ltd. Address before: 410100 new Changhai center service outsourcing base, No. 29, A, Changsha economic and Technological Development Zone, Changsha, Hunan, 3, 2 floor 204 Applicant before: Changsha convergent Environment Technology Co., Ltd. |
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Address after: 517000 Building E of Xionghua Science and Technology Park, No. 1 Xingye Avenue, Heyuan High-tech Zone, Guangdong Province Patentee after: Xionghua (Heyuan) Optical Technology Co.,Ltd. Address before: 517000 Building E of Xionghua Science and Technology Park, No. 1 Xingye Avenue, Heyuan High-tech Zone, Guangdong Province Patentee before: Heyuan Longxin Optical Technology Co.,Ltd. |
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