CN107513619B - A method of recovery indium and tin from ito glass waste material - Google Patents
A method of recovery indium and tin from ito glass waste material Download PDFInfo
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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
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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
- C22B25/00—Obtaining tin
- C22B25/06—Obtaining tin from scrap, especially tin scrap
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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
- C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
- C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
- C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
- C22B3/40—Mixtures
- C22B3/409—Mixtures at least one compound being an organo-metallic compound
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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
- C22B58/00—Obtaining gallium or indium
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/22—Electrolytic production, recovery or refining of metals by electrolysis of solutions of metals not provided for in groups C25C1/02 - C25C1/20
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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 present invention provides the methods of a kind of recovery indium and tin from ito glass waste material, include the following steps: (1) with HCl and HNO3Mixed solution impregnate ito glass powder, and H is added2O2Solution；(2) using the mixed solution of P204 and kerosene as extractant, HCl solution is that strippant is extracted and is stripped to leachate；(3) NaOH solution is added dropwise into the water phase after back extraction, is then separated by solid-liquid separation, Na is obtained2SnO3Solution and In (OH)3Solid；(4)In(OH)3It is electrolysed after solid dissolving with hydrochloric acid, obtains sponge indium；To Na2SnO3NaHCO is added in solution3Solution, the precipitating of generation dry to obtain SnO through high temperature2Product.This method can be realized simultaneously indium and the high efficiency of tin leaches, and also has the advantages that acid and alkali consumption amount is low, reaction efficiency is high, easy to operate, environmental pollution is small, is suitable for industrialized production.
Description
Technical field
The invention belongs to scrap concrete technical field more particularly to a kind of methods of recovery indium and tin from ITO waste material.
Background technique
Liquid crystal display device (Liquid Crystal Display, LCD) has work because its manufacturing cost constantly reduces
Voltage is low, low energy consumption, flicker free, total colouring function admirable, light portable, electromagnetic-radiation-free and to be easily achieved big picture aobvious
The advantages that showing and one of rapidly become current most great-hearted electronic product, it is all kinds of aobvious to be widely used in computer, TV, mobile phone etc.
Show equipment.
Liquid crystal display may enter the date of retirement after using 3-5, so as to cause largely discarded liquid crystal is generated
Show device, the increase of learies will constitute potential threat to environment.ITO has good as nano indium tin metal oxide
Electric conductivity and the transparency can cut off the electron radiation, ultraviolet light and far infrared being harmful to the human body.Therefore, indium tin oxide
It is usually sprayed in glass, plastics and electronic display, is used as transparent conductive film, while reducing the electronics spoke being harmful to the human body
It penetrates and ultraviolet, infra-red radiation.Indium is the rare precious metal that content is very low in a kind of earth's crust, and there are about 60%~70% indiums to be used for
The production of tin indium oxide (ITO) glass in liquid crystal display.Currently, the recovery processing technology of waste liquid crystal display is mainly
Landfill and burning, operating procedure is simple, treating capacity is big, operating cost is cheap, is that most countries and area are very heavy in the world
The municipal solid wastes processing mode wanted.In the case where indium, tin resource are rare, this mode can not effective recycling
Indium, tin scarce resource, to accelerate the exploitation of indium, tin mineral, cause the destruction of ecological environment and accelerate the withered of mineral resources
It exhausts.
The country is directed generally to exist from the recycling such as smeltery's slag, waste water content about the patent literature report of recovery indium
0.5% or more high-grade indium.Patent document CN101133172A discloses the method and dress of a kind of recovery indium from useless LCD
It sets.This method has carried out the comparative experiments with 48h dissolution for 24 hours using the hydrochloric acid of 1%, 3% and 10% 3 various concentration respectively,
It is too long that there are extraction times, the low problem of production efficiency.
Patent document CN 101722169A discloses a kind of method of liquid crystal display (LCD) harmless processing, and this method is by liquid
Heating and decomposition treatment after glass substrate in crystal display containing liquid crystal crushes, the organic gas of generation is sufficiently fired at high temperature
Harmless discharge after burning processing, but without reference to the specific method of recovery indium.
Patent document CN1900770A discloses a kind of liquid crystal display panel resource processing method, which realizes to useless
Old glass panel harmless treatment, but gone in the step of removing light polarizing film using organic matter, inorganic acid or inorganic base immersion
The method removed, resource consumption is big, and environment easy to pollute and is difficult to realize industrialization.
Summary of the invention
The technical problem to be solved by the present invention is to overcome the shortcomings of to mention in background above technology and defect, provide one
The cleaning of kind technique, short, easy to operate, metal recovery rate high recovery indium and tin from ito glass waste material the method for process.
In order to solve the above technical problems, technical solution proposed by the present invention be one kind from ito glass waste material recovery indium with
The method of tin, includes the following steps:
(1) HCl solution and HNO are used3The mixed solution A of solution impregnates ito glass powder, and H is added in soaking process2O2It is molten
Liquid obtains leachate and leached mud after reaction；
(2) using the mixed solution B of di-(2-ethylhexyl)phosphoric acid ester (P204) and kerosene as extractant, HCl solution is
Strippant is extracted and is stripped to leachate；
(3) NaOH solution is added dropwise into the water phase after back extraction, is separated by solid-liquid separation after reaction, Na is obtained2SnO3It is molten
Liquid and In (OH)3Solid, with dissolving with hydrochloric acid In (OH)3Solid is obtained containing In3+Solution；
(4) to containing In3+Solution is electrolysed, and sponge indium is obtained after separation of solid and liquid；To Na2SnO3NaHCO is added in solution3
Solution obtains Sn (OH)4It precipitates, dries to obtain SnO through high temperature after separation of solid and liquid2Product.
Above-mentioned method, it is preferred that in the mixed solution A of the step (1) molar ratio of hydrochloric acid and nitric acid be 8:(3~
7), H in mixed solution A+Molar concentration be 7~8mol/L.By Experimental Research, it has been found that hydrochloric acid to the leaching rate of indium compared with
Height, nitric acid are higher to the leaching rate of tin, by control hydrochloric acid and nitric acid ratio it is appropriate, can simultaneously high efficiency leach indium with
Tin.
Above-mentioned method, it is preferred that in the step (1), H is added per minute2O2The volume of solution accounts for mixed solution A body
Long-pending 0.2%~1.5%；The H2O2The mass fraction of solution is 15%~45%.It is furthermore preferred that the H2O2The matter of solution
Measuring score is 30%.The H of dropwise addition2O2Solution should not be excessive, H when excessive2O2Volume fraction is larger, and acid solution volume fraction is smaller,
To which pulp density increases, mass transfer rate is caused to reduce；If with constant flow pump by H2O2During being continuously added, it is molten that acid can be reduced
Liquid concentration, causes metal leaching rate to reduce；Therefore, by H2O2The rate of addition control of solution within the scope of the invention, can be into one
Step improves the oxidisability of solution, facilitates metal and dissolves in acid, to further increase leaching efficiency, but also can be avoided
A large amount of oxygen, which generate, in reaction process overflows.
Theoretically H is added in above-mentioned method in mixed solution A2O2Following chemical reaction occurs after solution:
In2O3+6H+→2In3++3H2O；
2InO+6H++3H2O2→2In3++6H2O+O2↑；
2In2O+12H++6H2O2→4In3++12H2O+O2↑；
SnO+H2O2+4H+→Sn4++3H2O。
Above-mentioned method, it is preferred that the current density of electrolytic process is 100~250A/m in the step (4)2, use
Aluminium sheet is as anode.It is furthermore preferred that current density is 150~200A/m2.It is rich by electrolysis displacement using aluminium sheet as anode
Indium in indium liquid, than traditional being directly added into, aluminium powder progress displacement efficiency is higher, and the rate of recovery of indium is higher, and additional power source makes sun
Electronics in the aluminium sheet of pole faster flows to cathode, and Al loses electronics and becomes Al3+, In3+Electronics, which is obtained, in cathode becomes sponge indium.
Above-mentioned method, it is preferred that the NaHCO being added in the step (4)3With Na in solution2SnO3Molar ratio be
(1.5~2.5): 1.It is furthermore preferred that the NaHCO being added in the step (4)3With Na in solution2SnO3Molar ratio be (1.8~
2): 1.Under alkaline condition, NaHCO is added when solution oxide current potential is higher3Adjust the pH of solution, the SnO in precipitation solution3 2-,
Prepare SnO2Product avoids largely consuming, reduce the reaction time for soda acid；It is chemically reacted below the generation of the process:
Na2SnO3+2NaHCO3+H2O→Sn(OH)4+2Na2CO3.Obtained Sn (OH)4SnO can be obtained after filtering drying in colloid2
Product: Sn (OH)4→SnO2+2H2O。
Above-mentioned method, it is preferred that first generate In (OH) after NaOH solution is added dropwise in the step (3)3With Sn (OH)4It is heavy
Form sediment, continuing to be added dropwise dissolves precipitating, until stop being added dropwise when precipitating is no longer reduced, pH value >=9 of aqueous phase solution at this time, then into
Row is separated by solid-liquid separation and obtains Na2SnO3Solution and In (OH)3Solid.This reaction process, main that following chemical reaction occurs:
In3++3OH-→In(OH)3；
Sn2++4OH-→Sn(OH)4；
Sn(OH)4+2OH-→SnO3 2-+3H2O；
Above-mentioned method, it is preferred that the ratio of the quality of the volume and ito glass powder of mixed solution A in the step (1)
For 20~30ml/g.
Above-mentioned method, it is preferred that in the step (1) soaking temperature be 30 DEG C~60 DEG C, soaking time be 30~
H is added dropwise in 60min2O2The time of sustained response is 30~60min after solution.It is furthermore preferred that soaking temperature is 50 DEG C~60 DEG C.
Above-mentioned method, it is preferred that the preparation process of ito glass powder includes operating in detail below in the step (1)
Step: first impregnating 30~60min of ito glass waste material with n-hexane, then removes ito glass waste material upper layer and lower layer polarisation with blade
Waste material is finally crushed to 0.5~2.5mm by piece, obtains ito glass powder.It is furthermore preferred that waste material is crushed to 0.5~
1.0mm obtains ito glass powder.Within the scope of the invention by granularity control, be conducive to improve ito glass in leaching process
Powder participates in the surface area of reaction, while carrying out mechanical activation, accelerates reaction speed.
Compared with prior art, using method of the invention from ito glass waste material recovery indium and tin, can be realized simultaneously
The high efficiency of indium and tin leaches, the rate of recovery of indium and tin up to 95% or more, sponge indium product and SnO2The purity of product is equal
Up to 90% or more；Method of the invention also has that acid and alkali consumption amount is low, reaction efficiency is high, at low cost, easy to operate, environment is dirty
Small advantage is contaminated, industrialized production is suitable for.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is the present invention
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is the process flow chart of the method for recovery indium and tin of the invention from ito glass waste material.
Specific embodiment
To facilitate the understanding of the present invention, invention herein is done below in conjunction with Figure of description and preferred embodiment more complete
Face meticulously describes, but protection scope of the present invention is not limited to following specific embodiments.
Unless otherwise defined, all technical terms used hereinafter are generally understood meaning phase with those skilled in the art
Together.Technical term used herein is intended merely to the purpose of description specific embodiment, and it is of the invention to be not intended to limitation
Protection scope.
Unless otherwise specified, various raw material, reagent, the instrument and equipment etc. used in the present invention can pass through city
Field is commercially available or can be prepared by existing method.
Embodiment 1:
A kind of method of recovery indium and tin of the invention from ito glass waste material, process flow chart is as shown in Figure 1, packet
Include following steps:
(1) waste liquid crystal display is disassembled, except decapsidate, bracket, takes out liquid crystal display panel, removes circuit board, conductive plate, back
After light source etc., ITO (Indium Tin Oxide) glass is obtained, ito glass 30min is impregnated with n-hexane, removes liquid crystal, use knife
Piece removes upper layer and lower layer polaroid, is crushed the ito glass powder for obtaining that granularity is 1.5mm；
(2) HCl solution and HNO are used3The mixed solution A of solution impregnates ito glass powder 60min at 30 DEG C, mixes molten
The ratio of the quality of the volume and ito glass powder of liquid A is 20ml/g, and the molar ratio of hydrochloric acid and nitric acid is 8:3 in mixed solution A,
H in mixed solution A+Concentration is 7mol/L, while in soaking process, volume to be added per minute as mixed liquor volume
The H that mass fraction is 30% is added in 0.2% speed2O2Solution, after addition the sustained response time be 30min, obtain leachate and
Leached mud；
(3) using the mixed solution B of P204 and kerosene as extractant, HCl solution is that strippant extracts leachate
It takes and is stripped；
(4) NaOH solution is added dropwise into the water phase after back extraction, until stopping being added dropwise when the precipitating generated is no longer reduced, at this time
The pH value of aqueous phase solution is 9, is separated by solid-liquid separation after reaction, obtains Na2SnO3Solution and In (OH)3Solid, it is molten with hydrochloric acid
It solves In (OH)3Solid is obtained containing In3+Solution；
(5) using aluminium sheet as anode, to containing In3+Solution is electrolysed, and the current density of electrolytic process is 200A/m2, electrolysis
Sponge indium is obtained after completion after being separated by solid-liquid separation；To Na2SnO3NaHCO is added in solution3Solution, the NaHCO of addition3With solution
Middle Na2SnO3Molar ratio be 2.5:1, obtain Sn (OH)4It precipitates, dries to obtain SnO through high temperature after separation of solid and liquid2Product.
Measured through detection means such as ICP, the recovery rate of indium is 95.2% in the method for the present embodiment, sponge indium product it is pure
The recovery rate that degree is 93.5%, Sn is 95.7%, purity 92.3%.
Embodiment 2
A kind of method of recovery indium and tin of the invention from ito glass waste material, includes the following steps:
(1) waste liquid crystal display is disassembled, except decapsidate, bracket, takes out liquid crystal display panel, removes circuit board, conductive plate, back
After light source etc., ITO (Indium Tin Oxide) glass is obtained, ito glass 60min is impregnated with n-hexane, removes liquid crystal, use knife
Piece removes upper layer and lower layer polaroid, and being crushed and obtaining granularity is 1.5mm ito glass powder；
(2) HCl solution and HNO are used3The mixed solution A of solution impregnates ito glass powder 60min at 30 DEG C, mixes molten
The ratio of the quality of the volume and ito glass powder of liquid A is 25ml/g, and the molar ratio of hydrochloric acid and nitric acid is 2:1 in mixed solution A,
H in mixed solution A+Concentration is 8mol/L, while in soaking process, volume to be added per minute as mixed liquor volume
The H that mass fraction is 30% is added in 0.5% speed2O2Solution, after addition the sustained response time be 45min, obtain leachate and
Leached mud；
(3) using the mixed solution of P204 and kerosene as extractant, HCl solution is that strippant extracts leachate
And back extraction；
(4) NaOH solution is added dropwise into the water phase after back extraction, until stopping being added dropwise when the precipitating generated is no longer reduced, at this time
The pH value of aqueous phase solution is 9, is separated by solid-liquid separation after reaction, obtains Na2SnO3Solution and In (OH)3Solid, it is molten with hydrochloric acid
It solves In (OH)3Solid is obtained containing In3+Solution；
(5) using aluminium sheet as anode, to containing In3+Solution is electrolysed, and the current density of electrolytic process is 200A/m2, electrolysis
Sponge indium is obtained after completion after being separated by solid-liquid separation；To Na2SnO3NaHCO is added in solution3Solution, the NaHCO of addition3With solution
Middle Na2SnO3Molar ratio be 2:1, obtain Sn (OH)4It precipitates, dries to obtain SnO through high temperature after separation of solid and liquid2Product.
Measured through detection means such as ICP, the recovery rate of indium is 97.2% in the method for the present embodiment, sponge indium product it is pure
The recovery rate that degree is 96.4%, Sn is 96.8%, purity 93.5%.
Embodiment 3
A kind of method of recovery indium and tin of the invention from ito glass waste material, includes the following steps:
(1) waste liquid crystal display is disassembled, except decapsidate, bracket, takes out liquid crystal display panel, removes circuit board, conductive plate, back
After light source etc., ITO (Indium Tin Oxide) glass is obtained, ito glass 60min is impregnated with n-hexane, removes liquid crystal, use knife
Piece removes upper layer and lower layer polaroid, and being crushed and obtaining granularity is 0.5mm ito glass powder；
(2) HCl solution and HNO are used3The mixed solution A of solution impregnates ito glass powder 60min at 30 DEG C, mixes molten
The ratio of the quality of the volume and ito glass powder of liquid A is 30ml/g, and the molar ratio of hydrochloric acid and nitric acid is 8:5 in mixed solution A,
H in mixed solution A+Concentration is 8mol/L, while in soaking process, volume to be added per minute as mixed liquor volume
The H that mass fraction is 30% is added in 0.5% speed2O2Solutions Solution, the sustained response time is 45min after addition, is leached
Liquid and leached mud；
(3) using the mixed solution B of P204 and kerosene as extractant, HCl solution is that strippant extracts leachate
It takes and is stripped；
(4) NaOH solution is added dropwise into the water phase after back extraction, until stopping being added dropwise when the precipitating generated is no longer reduced, at this time
The pH value of aqueous phase solution is 9, is separated by solid-liquid separation after reaction, obtains Na2SnO3Solution and In (OH)3Solid, it is molten with hydrochloric acid
It solves In (OH)3Solid is obtained containing In3+Solution；
(5) using aluminium sheet as anode, to containing In3+Solution is electrolysed, and the current density of electrolytic process is 200A/m2, electrolysis
Sponge indium is obtained after completion after being separated by solid-liquid separation；To Na2SnO3NaHCO is added in solution3Solution, the NaHCO of addition3With solution
Middle Na2SnO3Molar ratio be 2:1, obtain Sn (OH)4It precipitates, dries to obtain SnO through high temperature after separation of solid and liquid2Product.
Measured through detection means such as ICP, the recovery rate of indium is 98.3% in the method for the present embodiment, sponge indium product it is pure
The recovery rate that degree is 96.2%, Sn is 95.5%, purity 94.9%.
Embodiment 4
A kind of method of recovery indium and tin of the invention from ito glass waste material, includes the following steps:
(1) waste liquid crystal display is disassembled, except decapsidate, bracket, takes out liquid crystal display panel, removes circuit board, conductive plate, back
After light source etc., ITO (Indium Tin Oxide) glass is obtained, ito glass 60min is impregnated with n-hexane, removes liquid crystal, use knife
Piece removes upper layer and lower layer polaroid, and being crushed and obtaining granularity is 0.5mm ito glass powder；
(2) HCl solution and HNO are used3The mixed solution A of solution impregnates ito glass powder 60min at 30 DEG C, mixes molten
The ratio of the quality of the volume and ito glass powder of liquid A is 30ml/g, and the molar ratio of hydrochloric acid and nitric acid is 8:5 in mixed solution A,
H in mixed solution A+Concentration is 8mol/L, while in soaking process, volume to be added per minute as mixed liquor volume
The hydrogenperoxide steam generator that mass fraction is 30% is added in 0.5% speed, and the sustained response time is 45min after addition, is soaked
Liquid and leached mud out；
(3) using the mixed solution B of P204 and kerosene as extractant, HCl solution is that strippant extracts leachate
It takes and is stripped；
(4) NaOH solution is added dropwise into the water phase after back extraction, until stopping being added dropwise when the precipitating generated is no longer reduced, at this time
The pH value of aqueous phase solution is 9, is separated by solid-liquid separation after reaction, obtains Na2SnO3Solution and In (OH)3Solid, it is molten with hydrochloric acid
It solves In (OH)3Solid is obtained containing In3+Solution；
(5) using aluminium sheet as anode, to containing In3+Solution is electrolysed, and the current density of electrolytic process is 200A/m2, electrolysis
Sponge indium is obtained after completion after being separated by solid-liquid separation；To Na2SnO3NaHCO is added in solution3Solution, the NaHCO of addition3With solution
Middle Na2SnO3Molar ratio be 2.5:1, obtain Sn (OH)4It precipitates, dries to obtain SnO through high temperature after separation of solid and liquid2Product.
Measured through detection means such as ICP, the recovery rate of indium is 99.1% in the method for the present embodiment, sponge indium product it is pure
The recovery rate that degree is 97.7%, Sn is 96.3%, purity 93.7%.
Claims (8)
1. a kind of method of recovery indium and tin from ito glass waste material, which comprises the steps of:
(1) HCl solution and HNO are used3The mixed solution A of solution impregnates ito glass powder, and H is added in soaking process2O2Solution, instead
Should after obtain leachate and leached mud；
(2) using the mixed solution B of di-(2-ethylhexyl)phosphoric acid ester and kerosene as extractant, HCl solution is strippant pair
Leachate is extracted and is stripped；
(3) NaOH solution is added dropwise into the water phase after back extraction, first generates In (OH) after NaOH solution is added dropwise3With Sn (OH)4It is heavy
It forms sediment, continuing to be added dropwise dissolves precipitating, stops being added dropwise when precipitating is no longer reduced, at this time pH value >=9 of aqueous phase solution, reacts knot
It is separated by solid-liquid separation after beam, obtains Na2SnO3Solution and In (OH)3Solid, with dissolving with hydrochloric acid In (OH)3Solid is obtained containing In3+It is molten
Liquid；
(4) to containing In3+Solution is electrolysed, and sponge indium is obtained after separation of solid and liquid；To Na2SnO3NaHCO is added in solution3Solution,
It obtains Sn (OH)4It precipitates, dries to obtain SnO through high temperature after separation of solid and liquid2Product.
2. the method according to claim 1, wherein hydrochloric acid and nitric acid in the mixed solution A of the step (1)
Molar ratio is 8:(3~7), H in mixed solution A+Concentration be 7~8mol/L.
3. method according to claim 1 or 2, which is characterized in that in the step (1), H is added per minute2O2Solution
Volume accounts for the 0.2%~1.5% of mixed solution A volume；The H2O2The mass fraction of solution is 15%~45%.
4. method according to claim 1 or 2, which is characterized in that the current density of electrolytic process is in the step (4)
100~250A/m2, using aluminium sheet as anode.
5. method according to claim 1 or 2, which is characterized in that the NaHCO being added in the step (4)3In solution
Na2SnO3Molar ratio be (1.5~2.5): 1.
6. method according to claim 1 or 2, which is characterized in that the volume and ITO of mixed solution A in the step (1)
The ratio of the quality of glass powder is 20~30ml/g.
7. method according to claim 1 or 2, which is characterized in that soaking temperature is 30 DEG C~60 in the step (1)
DEG C, soaking time is 30~60min, and H is added dropwise2O2The time of sustained response is 30~60min after solution.
8. method according to claim 1 or 2, which is characterized in that the preparation of ito glass powder in the step (1)
Journey includes operating procedure in detail below: first impregnating 30~60min of ito glass waste material with n-hexane, then removes ITO glass with blade
Glass waste material upper layer and lower layer polaroid, is finally crushed to 0.5~2.5mm for waste material, obtains ito glass powder.
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| CN108423867A (en) * | 2018-03-06 | 2018-08-21 | 常州大学 | A kind of tin indium oxide etching waste liquid processing unit |
| CN109628746B (en) * | 2019-01-03 | 2021-02-26 | 江西铜业技术研究院有限公司 | Method for extracting tin from silver separating slag |
| CN109868489A (en) * | 2019-04-02 | 2019-06-11 | 柳州光华科技有限公司 | A kind of refinement of tin and recovery method |
| CN110408958B (en) * | 2019-08-28 | 2021-08-13 | 广东先导稀材股份有限公司 | Method for separating and recovering tin and indium from indium-tin alloy |
| CN111996550A (en) * | 2019-12-16 | 2020-11-27 | 青海西部铟业有限责任公司 | Method for directly electrolyzing and extracting metal indium from indium back extraction solution |
| KR102430314B1 (en) * | 2020-09-03 | 2022-08-05 | 고등기술연구원연구조합 | Leaching Method of Indium from Waste Liquid Crystal Dispaly Panel |
| CN112591786A (en) * | 2020-12-15 | 2021-04-02 | 株洲火炬安泰新材料有限公司 | Method for recovering ITO powder from ITO target grinding waste liquid |
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