CN109502559A - A kind of method of cadmium telluride waste recovery tellurium - Google Patents
A kind of method of cadmium telluride waste recovery tellurium Download PDFInfo
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- CN109502559A CN109502559A CN201811523738.0A CN201811523738A CN109502559A CN 109502559 A CN109502559 A CN 109502559A CN 201811523738 A CN201811523738 A CN 201811523738A CN 109502559 A CN109502559 A CN 109502559A
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- cadmium telluride
- tellurium
- cadmium
- waste recovery
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- MARUHZGHZWCEQU-UHFFFAOYSA-N 5-phenyl-2h-tetrazole Chemical compound C1=CC=CC=C1C1=NNN=N1 MARUHZGHZWCEQU-UHFFFAOYSA-N 0.000 title claims abstract description 77
- 229910052714 tellurium Inorganic materials 0.000 title claims abstract description 66
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 title claims abstract description 66
- 239000002699 waste material Substances 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000011084 recovery Methods 0.000 title claims abstract description 26
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000000843 powder Substances 0.000 claims abstract description 38
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 25
- 239000011593 sulfur Substances 0.000 claims abstract description 25
- 239000005864 Sulphur Substances 0.000 claims abstract description 17
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 238000005292 vacuum distillation Methods 0.000 claims abstract description 13
- 230000001681 protective effect Effects 0.000 claims abstract description 9
- 238000004073 vulcanization Methods 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 8
- 229910052793 cadmium Inorganic materials 0.000 claims description 33
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 33
- 239000007789 gas Substances 0.000 claims description 19
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 9
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 238000004821 distillation Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 4
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002351 wastewater Substances 0.000 abstract description 4
- 230000001698 pyrogenic effect Effects 0.000 abstract description 3
- CJOBVZJTOIVNNF-UHFFFAOYSA-N cadmium sulfide Chemical compound [Cd]=S CJOBVZJTOIVNNF-UHFFFAOYSA-N 0.000 abstract description 2
- 238000003912 environmental pollution Methods 0.000 abstract description 2
- XSOKHXFFCGXDJZ-UHFFFAOYSA-N telluride(2-) Chemical compound [Te-2] XSOKHXFFCGXDJZ-UHFFFAOYSA-N 0.000 description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000008151 electrolyte solution Substances 0.000 description 5
- 229910004613 CdTe Inorganic materials 0.000 description 4
- 239000003792 electrolyte Substances 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910052980 cadmium sulfide Inorganic materials 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 229910003069 TeO2 Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- WUPHOULIZUERAE-UHFFFAOYSA-N 3-(oxolan-2-yl)propanoic acid Chemical compound OC(=O)CCC1CCCO1 WUPHOULIZUERAE-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- GXDVEXJTVGRLNW-UHFFFAOYSA-N [Cr].[Cu] Chemical compound [Cr].[Cu] GXDVEXJTVGRLNW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229940065285 cadmium compound Drugs 0.000 description 1
- 150000001662 cadmium compounds Chemical class 0.000 description 1
- 229910000369 cadmium(II) sulfate Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005342 ion exchange Methods 0.000 description 1
- 150000007522 mineralic acids Chemical class 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005486 sulfidation Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B19/00—Selenium; Tellurium; Compounds thereof
- C01B19/02—Elemental selenium or tellurium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The present invention relates to a kind of methods of cadmium telluride waste recovery tellurium, belong to field of thermometallurgical technology.Cadmium telluride waste material is broken into powder first and obtains cadmium telluride wasted powder by step；Obtained cadmium telluride wasted powder is uniformly mixed with sulphur, is pressed into small column；By obtained small column sealing, filled with protective gas under the conditions of, temperature be 450~550 DEG C of 30~45min of vulcanization obtain sulfur product；Obtained sulfur product is crushed frustillatum, then vacuum distillation, which obtains then being evaporated in vacuo, obtains tellurium product in the mixture and condensate pans of Containing Sulfur cadmium.The present invention is a completely new process flow, effectively recycles tellurium in cadmium telluride waste material using pyrogenic process, realizes the secondary use of tellurium resource.This process flow is short, and technology path is scientific and reasonable, discharges in production process without gas, the generation of waste water, and environmental pollution is low.The method rate of recovery is high, and tellurium purity is up to 99.9% or more.
Description
Technical field
The present invention relates to a kind of methods of cadmium telluride waste recovery tellurium, belong to field of thermometallurgical technology.
Background technique
Since non-renewable resources are more and more rare, utilization is renewable, sustainable, clean, Ke Xunhuanliyong too
Positive energy photovoltaic apparatus, as cadmium telluride solar battery increasingly receives an acclaim.Such as from cadmium telluride cells waste material (such as used tellurium
Cadmium solar battery and manufacture cadmium telluride solar battery process in generate waste material) in recycling tellurium be one increasingly by
To the project of concern.
A kind of technology of the recycling of telluride cadmium component cadmium telluride is to use acid solution separated and dissolved semiconductive thin film, then in alkalinity
It is precipitated in environment.Component is disassembled first and recycles lead system or copper common wire, is then crushed encapsulation with hammer mill and is partly led
The layer glass of body thin film.CdTe and CdS film, glass fragment, EVA etc. are put into the mixing of sulfuric acid and hydrogen peroxide together
In solution, CdTe and CdS semiconductor is dissolved in acid solution together with back electrode metal.Reaction generates CdSO4With Te (SO4)2It is mixed
Close solution.CdCO is obtained by precipitating3And TeO2Sediment.Hydrogen furnace restores CdCO again3, TeO2Mud cake, then heating synthesis
CdTe.The shortcomings that this mode is various metal impurities, cannot be removed, and the CdTe recovered is caused to cannot be directly used to electricity
The production of pond component.Another way is with NaOH or KOH concentrated solution.Tellurium therein can be re-dissolved in this way, make itself and its
He divides metal (including cadmium).High-purity electrolysis tellurium ingot can be obtained from obtained telluride sodium or telluride potassium electrolyte.
The simple substance Te of high-purity (99.7%) can be generated in this recovery process, and reaches the 80% even higher rate of recovery.
And 99% or more cadmium is recovered with precipitation form, is only less than 1% loss in aqueous.So the cadmium of this part must pass through again
Ion-exchange treatment recycles.The above method mainly include crushing cadmium telluride solar battery waste material, with inorganic acid/or oxidation
The cadmium telluride solar battery waste material of agent and crushing reacts, and extracts and separating tellurium and cadmium.These multiple steps
It is rapid to seem sufficiently complex usually using method.Furthermore cadmium telluride solar battery is crushed, from relatively large glass and plastics
Material of the weight less than 0.05% is recycled in the middle, is done so obvious uneconomical.Moreover, also containing in cadmium telluride solar battery
The materials such as copper chromium, the tellurium that this method obtains usually mix with copper and cadmium etc., and purity is not high enough, it is necessary to further be located
Reason.
Number of patent application is 20111025011.5 to propose the first electrolyte solution contacts cadmium components containing telluride, with the
By the second electrolyte solution contacts comparative electrode of anionic spacer between one electrolyte solution, in the cadmium component containing telluride and
Apply voltage difference between the comparative electrode, so that tellurium removes from the component containing cadmium telluride and is deposited on the comparative electrode
On.Number of patent application is that 201010162679.6 propositions contact the cadmium telluride group with the electrolyte solution that pH is about 9 or more
Part adds voltage between the telluride cadmium component and affiliated comparative electrode with the opposite electrode of the electrolyte solution contacts
Difference, to cause tellurium to remove in the telluride cadmium component and be deposited on the comparative electrode.Foregoing invention method can generate
A large amount of cadmium wastewater needs that waste water is further processed, recycles to cadmium element, and recycles link to water
The dependence of circular treatment technology is very high.
It is reported that sulfuric acid can be used as the electrolyte of electrochemical cell to remove cadmium telluride in cadmium telluride old and useless battery,
And by adjusting the voltage that uses, the concentration of cadmium regains cadmium and tellurium on one of the electrodes in mixing speed and electrolyte
Than the Cadimium telluride thin film for being classified as 1:1 to 1:6, this report is not described in how the experiment carries out, and therefore, it is difficult to replicate.But
It is that simulated experiment shows the cadmium telluride for hardly resulting in and being used directly to directly produce Cadimium telluride thin film.In addition, the simulated experiment
When attempting individually to recycle tellurium, pure tellurium only can just be obtained at the very low pH of range, this may be because tellurium and cadmium are in sulfuric acid electricity
Solving in matter is in the form of ions.They have deposits on electrode under condition of similarity, mutually pollutes.It is especially electric
Pollution becomes apparent when solution matter intermediate ion concentration changes with deposition process.Industrial application is usually good at maintaining electrolyte pH
In very narrow range, therefore it is difficult to obtain the tellurium of reliable quality.
Summary of the invention
For the above-mentioned problems of the prior art and deficiency, the present invention provides a kind of side of cadmium telluride waste recovery tellurium
Method.The invention is realized by the following technical scheme.
A kind of method of cadmium telluride waste recovery tellurium comprising following steps:
Cadmium telluride waste material is broken into powder first and obtains cadmium telluride wasted powder by step 1；
The cadmium telluride wasted powder that step 1 obtains is uniformly mixed by step 2 with sulphur, is pressed into small column；
Step 3, the small column for obtaining step 2 sealing, filled with protective gas under the conditions of, temperature be 450~550 DEG C vulcanization
30~45min obtains sulfur product；
Step 4, the sulfur product for obtaining step 3 are crushed frustillatum, and then vacuum distillation obtains the mixture of Containing Sulfur cadmium
With tellurium product in condensate pans.
Cadmium telluride wasted powder is 80~120 mesh in the step 1；Cadmium telluride waste material is crushed the time as 15~20min, turns
1000~1200r/min of speed.
Cadmium telluride wasted powder and sulphur molar ratio are 1:1.1~1.3 in the step 2.
Small column pressing pressure is 7~9Mpa in the step 2, and roundlet column diameter is 1.2~1.8cm, the height of small column
Degree is 2~2.5cm.
Protective gas is nitrogen or argon gas in the step 3.
Small bulk height × diameter is 0.3cm~0.8cm × 0.3cm~0.8cm in the step 4.
The vacuum degree being evaporated in vacuo in the step 4 is 15~30pa, and vapo(u)rizing temperature is 700~780 DEG C, the time of distillation
For 30~50min.
Key reaction of the present invention in sulfidation: 2CdTe+2S=2CdS+Te2。
The beneficial effects of the present invention are:
The present invention is a completely new process flow, and tellurium is effectively recycled in cadmium telluride waste material using pyrogenic process, realizes tellurium money
The secondary use in source.This process flow is short, and technology path is scientific and reasonable, discharges in production process without gas, the generation of waste water,
Environmental pollution is low.The method rate of recovery is high, and tellurium purity is up to 99.9% or more.
Detailed description of the invention
Fig. 1 is process flow chart of the invention.
Specific embodiment
With reference to the accompanying drawings and detailed description, the invention will be further described.
Embodiment 1
As shown in Figure 1, the method for the cadmium telluride waste recovery tellurium comprising following steps:
Step 1, by 1200g cadmium telluride waste material, (tellurium content is broken into powder for 53.17wt%, cadmium content 46.83wt%) first
Obtain cadmium telluride wasted powder；Cadmium telluride wasted powder is 100 mesh；Wherein the cadmium telluride waste material broken time is 15min, revolving speed
1000r/min；
Step 2 rubs cadmium telluride wasted powder and 190.44g sulphur that step 1 obtains according to cadmium telluride wasted powder and sulphur
You are pressed into small column than being uniformly mixed for 1:1.2；Wherein small column pressing pressure is 8Mpa, and roundlet column diameter is 1.8cm,
The height of small column is 2.5cm；
Step 3, the small column for obtaining step 2 sealing, filled with protective gas under the conditions of, temperature be 500 DEG C of vulcanization 30min
Obtain sulfur product；Wherein shield gas is nitrogen；
Step 4, the sulfur product for obtaining step 3 are crushed frustillatum (small bulk height × diameter is 0.8cm × 0.5cm), so
Vacuum distillation (vacuum degree of vacuum distillation is 20pa, and vapo(u)rizing temperature is 700 DEG C, and the time of distillation is 30min) obtains sulfur-bearing afterwards
Tellurium product in the mixture and condensate pans of cadmium.
This example finally obtains 625.39g tellurium product.The rate of recovery of tellurium reaches 99.01%.To finally obtained sulfur-bearing cadmium
Mixture and condensate pans in tellurium product analyzed, the results are shown in Table 1:
Table 1
As shown in Table 1, the purity that can obtain tellurium product in embodiment 1 in condensate pans reaches 99.95%, in the mixture of crucible
Cadmium sulfide is enriched with.
Embodiment 2
As shown in Figure 1, the method for the cadmium telluride waste recovery tellurium comprising following steps:
Step 1, by 1200g cadmium telluride waste material, (tellurium content is broken into powder for 53.17wt%, cadmium content 46.83wt%) first
Obtain cadmium telluride wasted powder；Cadmium telluride wasted powder is 100 mesh；Wherein the cadmium telluride waste material broken time is 15min, revolving speed
1000r/min；
Step 2 rubs cadmium telluride wasted powder and 190.44g sulphur that step 1 obtains according to cadmium telluride wasted powder and sulphur
You are pressed into small column than being uniformly mixed for 1:1.2；Wherein small column pressing pressure is 8Mpa, and roundlet column diameter is 1.8cm,
The height of small column is 2.5cm；
Step 3, the small column for obtaining step 2 sealing, filled with protective gas under the conditions of, temperature be 450 DEG C of vulcanization 40min
Obtain sulfur product；Wherein shield gas is nitrogen；
Step 4, the sulfur product for obtaining step 3 are crushed frustillatum (small bulk height × diameter is 0.8cm × 0.5cm), so
Vacuum distillation (vacuum degree of vacuum distillation is 20pa, and vapo(u)rizing temperature is 720 DEG C, and the time of distillation is 40min) obtains sulfur-bearing afterwards
Tellurium product in the mixture and condensate pans of cadmium.
This example finally obtains 627.25g tellurium product.The rate of recovery of tellurium reaches 99.31%.To finally obtained sulfur-bearing cadmium
Mixture and condensate pans in tellurium product analyzed, the results are shown in Table 2:
Table 2
As shown in Table 2, the purity that can obtain tellurium product in embodiment 2 in condensate pans reaches 99.97%, the sulphur in crucible mixture
Cadmium is enriched with.
Embodiment 3
As shown in Figure 1, the method for the cadmium telluride waste recovery tellurium comprising following steps:
Step 1, by 1200g cadmium telluride waste material, (tellurium content is broken into powder for 53.17wt%, cadmium content 46.83wt%) first
Obtain cadmium telluride wasted powder；Cadmium telluride wasted powder is 100 mesh；Wherein the cadmium telluride waste material broken time is 15min, revolving speed
1000r/min；
Step 2 rubs cadmium telluride wasted powder and 190.44g sulphur that step 1 obtains according to cadmium telluride wasted powder and sulphur
You are pressed into small column than being uniformly mixed for 1:1.2；Wherein small column pressing pressure is 8Mpa, and roundlet column diameter is 1.8cm,
The height of small column is 2.5cm；
Step 3, the small column for obtaining step 2 sealing, filled with protective gas under the conditions of, temperature be 550 DEG C of vulcanization 40min
Obtain sulfur product；Wherein shield gas is nitrogen；
Step 4, the sulfur product for obtaining step 3 are crushed frustillatum (small bulk height × diameter is 0.8cm × 0.5cm), so
Vacuum distillation (vacuum degree of vacuum distillation is 15pa, and vapo(u)rizing temperature is 750 DEG C, and the time of distillation is 40min) obtains sulfur-bearing afterwards
Tellurium product in the mixture and condensate pans of cadmium.
This example finally obtains 628.47g tellurium product.The rate of recovery of tellurium reaches 99.50%.To finally obtained sulfur-bearing cadmium
Mixture and condensate pans in tellurium product analyzed, the results are shown in Table 3:
Table 3
As shown in Table 3, the purity that can obtain tellurium product in embodiment 3 in condensate pans reaches 99.97%, the sulphur in crucible mixture
Cadmium is enriched with.
By embodiment 1 ~ 3 it is found that the tellurium in pyrogenic process provided by the invention recycling cadmium telluride diaphragm solar battery recycles
Method obtains the pure tellurium and vulcanization cadmium compound that purity is 99.9% or more；And the rate of recovery of tellurium reaches (99% or more), realizes
The high efficiente callback of tellurium.
Embodiment 4
As shown in Figure 1, the method for the cadmium telluride waste recovery tellurium comprising following steps:
Step 1, by 1200g cadmium telluride waste material, (tellurium content is broken into powder for 53.17wt%, cadmium content 46.83wt%) first
Obtain cadmium telluride wasted powder；Cadmium telluride wasted powder is 80 mesh；Wherein the cadmium telluride waste material broken time is 20min, revolving speed
1200r/min；
Step 2, the cadmium telluride wasted powder that step 1 is obtained and sulphur are 1 according to cadmium telluride wasted powder and sulphur molar ratio:
1.1 are uniformly mixed, and are pressed into small column；Wherein small column pressing pressure is 7Mpa, and roundlet column diameter is 1.2cm, small column
Height is 2cm；
Step 3, the small column for obtaining step 2 sealing, filled with protective gas under the conditions of, temperature be 550 DEG C of vulcanization 40min
Obtain sulfur product；Wherein shield gas is argon gas；
Step 4, the sulfur product for obtaining step 3 are crushed frustillatum (small bulk height × diameter is 0.5cm × 0.3cm), so
Vacuum distillation (vacuum degree of vacuum distillation is 30pa, and vapo(u)rizing temperature is 780 DEG C, and the time of distillation is 50min) obtains sulfur-bearing afterwards
Tellurium product in the mixture and condensate pans of cadmium.
Embodiment 5
As shown in Figure 1, the method for the cadmium telluride waste recovery tellurium comprising following steps:
Step 1, by 1200g cadmium telluride waste material, (tellurium content is broken into powder for 53.17wt%, cadmium content 46.83wt%) first
Obtain cadmium telluride wasted powder；Cadmium telluride wasted powder is 120 mesh；Wherein the cadmium telluride waste material broken time is 18min, revolving speed
1100r/min；
Step 2, the cadmium telluride wasted powder that step 1 is obtained and sulphur are 1 according to cadmium telluride wasted powder and sulphur molar ratio:
1.3 are uniformly mixed, and are pressed into small column；Wherein small column pressing pressure is 9Mpa, and roundlet column diameter is 1.6cm, small column
Height is 2.1cm；
Step 3, the small column for obtaining step 2 sealing, filled with protective gas under the conditions of, temperature be 480 DEG C of vulcanization 45min
Obtain sulfur product；Wherein shield gas is argon gas；
Step 4, the sulfur product for obtaining step 3 are crushed frustillatum (small bulk height × diameter is 0.3cm × 0.8cm), so
Vacuum distillation (vacuum degree of vacuum distillation is 25pa, and vapo(u)rizing temperature is 760 DEG C, and the time of distillation is 45min) obtains sulfur-bearing afterwards
Tellurium product in the mixture and condensate pans of cadmium.
In conjunction with attached drawing, the embodiment of the present invention is explained in detail above, but the present invention is not limited to above-mentioned
Embodiment within the knowledge of a person skilled in the art can also be before not departing from present inventive concept
Put that various changes can be made.
Claims (7)
1. a kind of method of cadmium telluride waste recovery tellurium, it is characterised in that include the following steps:
Cadmium telluride waste material is broken into powder first and obtains cadmium telluride wasted powder by step 1；
The cadmium telluride wasted powder that step 1 obtains is uniformly mixed by step 2 with sulphur, is pressed into small column；
Step 3, the small column for obtaining step 2 sealing, filled with protective gas under the conditions of, temperature be 450~550 DEG C vulcanization
30~45min obtains sulfur product；
Step 4, the sulfur product for obtaining step 3 are crushed frustillatum, and then vacuum distillation is obtained then being evaporated in vacuo and be obtained
Tellurium product in the mixture and condensate pans of sulfur-bearing cadmium.
2. the method for cadmium telluride waste recovery tellurium according to claim 1, it is characterised in that: cadmium telluride in the step 1
Wasted powder is 80~120 mesh.
3. the method for cadmium telluride waste recovery tellurium according to claim 1, it is characterised in that: cadmium telluride in the step 2
Wasted powder and sulphur molar ratio are 1:1.1~1.3.
4. the method for cadmium telluride waste recovery tellurium according to claim 1, it is characterised in that: small column in the step 2
Pressing pressure is 7~9Mpa, and roundlet column diameter is 1.2~1.8cm, and the height of small column is 2~2.5cm.
5. the method for cadmium telluride waste recovery tellurium according to claim 1, it is characterised in that: protect gas in the step 3
Body is nitrogen or argon gas.
6. the method for cadmium telluride waste recovery tellurium according to claim 1, it is characterised in that: small bulk in the step 4
Height × diameter 1.5cm~2.5cm × 1.2cm~1.8cm.
7. the method for cadmium telluride waste recovery tellurium according to claim 1, it is characterised in that: vacuum is steamed in the step 4
The vacuum degree evaporated is 15~30pa, and vapo(u)rizing temperature is 700~780 DEG C, and the time of distillation is 30~50min.
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Cited By (5)
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|---|---|---|---|---|
| CN112143896A (en) * | 2020-08-26 | 2020-12-29 | 昆明理工大学 | Method for recovering tellurium and bismuth from bismuth telluride waste |
| CN112375917A (en) * | 2020-11-11 | 2021-02-19 | 昆明理工大学 | Method for recovering tellurium copper from copper telluride slag |
| CN113060707A (en) * | 2021-03-16 | 2021-07-02 | 成都中建材光电材料有限公司 | Method for recovering cadmium telluride waste assembly |
| CN114132902A (en) * | 2021-12-31 | 2022-03-04 | 峨嵋半导体材料研究所 | Recovery method of cadmium telluride waste material |
| CN115520840A (en) * | 2022-09-15 | 2022-12-27 | 广东先导稀贵金属材料有限公司 | Method for separating and recovering tellurium and cadmium from cadmium telluride |
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| CN107128885A (en) * | 2016-08-16 | 2017-09-05 | 广东先导稀材股份有限公司 | The method that tellurium is reclaimed from cadmium telluride waste material |
| CN108862212A (en) * | 2018-08-31 | 2018-11-23 | 昆明鼎邦科技股份有限公司 | A method of extracting tellurium from copper tellurium slag |
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| CN107128885A (en) * | 2016-08-16 | 2017-09-05 | 广东先导稀材股份有限公司 | The method that tellurium is reclaimed from cadmium telluride waste material |
| CN108862212A (en) * | 2018-08-31 | 2018-11-23 | 昆明鼎邦科技股份有限公司 | A method of extracting tellurium from copper tellurium slag |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112143896A (en) * | 2020-08-26 | 2020-12-29 | 昆明理工大学 | Method for recovering tellurium and bismuth from bismuth telluride waste |
| CN112375917A (en) * | 2020-11-11 | 2021-02-19 | 昆明理工大学 | Method for recovering tellurium copper from copper telluride slag |
| CN113060707A (en) * | 2021-03-16 | 2021-07-02 | 成都中建材光电材料有限公司 | Method for recovering cadmium telluride waste assembly |
| CN114132902A (en) * | 2021-12-31 | 2022-03-04 | 峨嵋半导体材料研究所 | Recovery method of cadmium telluride waste material |
| CN115520840A (en) * | 2022-09-15 | 2022-12-27 | 广东先导稀贵金属材料有限公司 | Method for separating and recovering tellurium and cadmium from cadmium telluride |
| CN115520840B (en) * | 2022-09-15 | 2024-04-09 | 广东先导稀贵金属材料有限公司 | Method for separating and recovering tellurium and cadmium from cadmium telluride |
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