CN106629731A - Method for recycling and processing waste silicon mud - Google Patents
Method for recycling and processing waste silicon mud Download PDFInfo
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- CN106629731A CN106629731A CN201611244272.1A CN201611244272A CN106629731A CN 106629731 A CN106629731 A CN 106629731A CN 201611244272 A CN201611244272 A CN 201611244272A CN 106629731 A CN106629731 A CN 106629731A
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- silicon mud
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/06—Recovery or working-up of waste materials of polymers without chemical reactions
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2371/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
- C08J2371/02—Polyalkylene oxides
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Treatment Of Sludge (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The present invention relates to a method for recycling and processing waste silicon mud, and the method includes the following steps: a. mixing the waste silicon mud and water proportionally, adding a dispersant in given amount, and conducting sufficient stirring; and b. heating well stirred slurry to 50-85 DEG C, and injecting the heated slurry to a first horizontal centrifuge through a peristaltic pump; mixing the obtained first separated sands and water under sufficient stirring, and injecting a mixture of the first separated sands and water to a second horizontal centrifuge through the peristaltic pump for centrifugal separation; mixing the obtained second separated sands and water under sufficient stirring, and injecting a mixture of the second separated sands and water to a third horizontal centrifuge through the peristaltic pump for centrifugal separation; drying the obtained third separated sands, and sorting the dried sands by a multistage air classifier, thereby obtaining a silicon carbide finished product after recycling and processing. The method greatly improves the utilization rate of resources. The contents of silicon carbide and polyethylene glycol in the obtained filter residues are low, while the content of silicon in the filter residues is high, as a result, the filter residues can be used as deoxidizers in steel-making and rubber additives. The whole production process realizes zero emission, and the method solves the outstanding problem on environmental protection in the field.
Description
Technical field
The present invention relates to a kind of useless silicon mud recovery and treatment method.
Background technology
In recent years photovoltaic industry due to production capacity it is seriously superfluous, in industry each manufacturer's technological innovation and drop this
Pressure is serious all the more, and link is cut similarly as the silicon chip of one of main production link in the middle of photovoltaic whole production line
So.The reduction of the mortar cost in silicon chip cutting process as one of main auxiliary material becomes the main of silicon chip manufacturer
This means drops.
The waste mortar that silicon chip manufacturer carries out being produced after silicon chip cutting entrusts other factory to continue after being recycled offline
Carry out silicon chip processing to use, but due to the limitation of technology and technique cause the yield that waste mortar is reclaimed offline relatively low and into
This is higher.Through technological innovation and improvement, it is online that waste mortar is installed in silicon chip workshop by current majority silicon chip manufacturers
Recovery system, carries out voluntary recall and processes waste mortar.Compared with offline recovery, online recycling waste mortar high income, cost declines
Substantially（Mortar cost can decline more than 50%）, and it is easy to management.
However, substantial amounts of silicon mud discarded object can be produced in waste mortar online recycling processing procedure（Main component is silica flour, carbon
SiClx and polyethylene glycol）.The a large amount of carborundum contained in silicon mud discarded object and polyethylene glycol（Carborundum content about 35%, poly- second two
Alcohol content about 28%）Still have and reclaim use value.In addition, silicon mud discarded object is not if focused on, environment can be caused sternly
Heavily contaminated.
At present, the most of silicon mud discarded object in industry is extracted after washing and adopted after a part of polyethylene glycol therein
Processed with the simple and crude mode such as burial, discarded.This not only causes the very big wasting of resources, while also causing to environment
Serious pollution.Therefore, for generation in photovoltaic industry silicon chip production link waste mortar online recycling processing procedure
Silicon mud carries out recycling and has larger economic benefit, and can mitigate the pollution to environment.
The content of the invention
The technical problem to be solved in the present invention is：Overcome the deficiencies in the prior art, there is provided a kind of useless silicon mud recycling side
Method, solves the wasting of resources in the past useless silicon mud processing procedure and pollutes the technical problem of environment.
The technical solution adopted for the present invention to solve the technical problems is：A kind of useless silicon mud recovery and treatment method, including with
Lower step：
A, useless silicon mud is mixed in proportion with water, and add a certain amount of dispersant and be sufficiently stirred for；
B, the slurry being stirred is heated into 50-85 DEG C after one-level horizontal centrifuge is squeezed into by peristaltic pump, it is separated after shape
Into first separation sand and first separation liquid；
Described first separation sand carries out mixing with water to be squeezed into two grades of horizontal centrifuges and carries out by peristaltic pump again after being sufficiently stirred for
Centrifugation；Secondary separation liquid and secondary separation sand are formed after separated；
The secondary separation sand is centrifuged squeezing into three-stage horizontal type centrifuge by peristaltic pump after mixing and be sufficiently stirred for water
Separate；Formed after separated three times and separate sand and three separating liquids；
Three times separate sand dried and by Multi-stage airflow grader sorted and be recycled process after carborundum into
Product.
Further, in step b, the first separation liquid adds a certain amount of filter aid to squeeze into by high-pressure pump
Plate and frame filter press carries out press filtration；
The pressing filtering liquid that press filtration is obtained adds activated carbon to be decolourized；
Liquid after decolouring carries out again press filtration process, and the liquid after press filtration passes sequentially through ion exchange resin and carries out ion exchange
And vacuum distillation apparatus carry out distillation dehydration, and obtain polyethylene glycol finished product.
Further, the secondary separation liquid for being formed in step b is used to be mixed with the useless silicon mud in step a；
Three separating liquids formed in step b are used to be stirred with first separation sand to mix.
Further, in step a, the silicon mud that gives up is with water according to 1:0.8～1:3 mass ratio is mixed, and is added
The amount of dispersant is that silicon mud per ton adds dispersant 80-200g.
Further, the amount for adding filter aid is that one-level separating liquid per ton adds filter aid 5kg-20kg；
The amount of added activated carbon is that activated carbon 4.5kg-8kg is added in pressing filtering liquid per ton.
Further, the distilled water for producing after the distillation of Jing vacuum distillation apparatus is used to mix with the stirring of secondary separation sand.
Further, described filter aid using polyacrylamide, polyamine, polyvinyl alcohol, polyethylene glycol oxide, acrylic acid and
Methyl olefin(e) acid polymer, calcium oxide, calcium hydroxide, ferric sulfate, aluminum sulfate, iron chloride, cellulose, modified starch or diatomite.
The invention has the beneficial effects as follows：Solar silicon wafers are cut into the carborundum in the useless silicon mud after waste mortar recycling
Content is reduced to less than 10%, polyethyleneglycol content and is reduced to less than 5%, greatly improves resource utilization, and resulting
Filter residue due to carborundum and polyethyleneglycol content it is relatively low, silicone content is higher, can be used as deoxidizer in steel production, rubber additive
Deng whole production process realizes zero-emission, solves the field and projects environmental issue.
Specific embodiment
Presently in connection with specific embodiment, the present invention is further illustrated.
A kind of useless silicon mud recovery and treatment method, comprises the following steps：
A, useless silicon mud is mixed in proportion with water, and add a certain amount of dispersant and be sufficiently stirred for；Useless silicon mud is with water according to 1:0.8
～1:3 mass ratio is mixed, and the amount of the dispersant for being added is that silicon mud per ton adds dispersant 80-200g.
B, the slurry being stirred is heated into 50-85 DEG C after one-level horizontal centrifuge is squeezed into by peristaltic pump, it is separated it
First separation sand and first separation liquid are formed afterwards；One-level horizontal centrifuge rotating speed is 500-800 rev/min；
First separation sand carries out mixing being sufficiently stirred for water, and density domination squeezes into two grades in 1.3-1.7kg/L, then by peristaltic pump
Horizontal centrifuge is centrifuged；Secondary separation liquid and secondary separation sand are formed after separated；Two grades of horizontal centrifuges
Rotating speed is 700-1000 rev/min；
Secondary separation sand mixes with water and is sufficiently stirred for, density domination in 1.3-1.7kg/L, then by peristaltic pump squeeze into three-level crouch
Formula centrifuge is centrifuged；Formed after separated three times and separate sand and three separating liquids；Three-stage horizontal type centrifuge turn
Speed is 900-1200 rev/min.
Separate the carbonization that sand is dried and sorted and be recycled after processing by Multi-stage airflow grader for three times
Silicon finished product.The gas flow of Multi-stage airflow grader internal cyclone collector is set as into 3/minutes of 80-120m, by multistage gas
The rotating speed of current classifier is controlled at 450-700 rev/min.
First separation liquid Polyethylene glycol is higher, therefore, in stepb, first separation liquid adds a certain amount of drainage
Agent is squeezed into plate and frame filter press and carries out press filtration by high-pressure pump；Also applicable frame filter press；Filter aid adopts polyacrylamide, gathers
Amine, polyvinyl alcohol, polyethylene glycol oxide, acrylic acid and methyl olefin(e) acid polymer, calcium oxide, calcium hydroxide, ferric sulfate, aluminum sulfate,
Iron chloride, cellulose, modified starch or diatomite.
The amount of added filter aid is that one-level separating liquid per ton adds filter aid 5kg-20kg；The pressing filtering liquid that press filtration is obtained adds
Enter activated carbon to be decolourized；The amount of added activated carbon is that activated carbon 4.5kg-8kg is added in pressing filtering liquid per ton.Liquid after decolouring
Body carries out again press filtration process, and the liquid after press filtration passes sequentially through ion exchange resin and carries out ion exchange and vacuum distillation dress
Putting carries out distillation dehydration, and obtains polyethylene glycol finished product.
Jing after plate and frame filter press press filtration, pressing filtering liquid is used to extract polyethylene glycol first separation liquid, in the filter residue that press filtration is got off
Carborundum and polyethyleneglycol content are than relatively low（Carborundum content≤10%, polyethyleneglycol content≤5%）Can be used as making steel industry
Reducing agent.
To realize the purpose that economizes on resources, the secondary separation liquid for being formed in stepb is used to enter with the useless silicon mud in step a
Row mixing；Secondary separation liquid can be so made full use of, and avoids toppling over the part secondary separation liquid pollution on the environment.
Equally, be realize economize on resources and environmental protection purpose, in step b formed three separating liquids be used for and one
Secondary separation sand is stirred mixing.
Equally, be realize economize on resources and environmental protection purpose, Jing vacuum distillation apparatus distillation after produce steaming
Distilled water is used to mix with the stirring of secondary separation sand.
Useless silicon mud is processed using the processing method of the present invention, fully extracts the polyethylene glycol in useless silicon mud and carbonization
Silicon, mitigates its pollution on the environment.
With the above-mentioned desirable embodiment according to the present invention as enlightenment, by above-mentioned description, relevant staff is complete
Entirely various change and modification can be carried out in the range of without departing from this invention technological thought.The technology of this invention
Property scope is not limited to the content on specification, it is necessary to its technical scope is determined according to right.
Claims (7)
1. a kind of useless silicon mud recovery and treatment method, is characterized in that, comprise the following steps：
A, useless silicon mud is mixed in proportion with water, and add a certain amount of dispersant and be sufficiently stirred for；
B, the slurry being stirred is heated into 50-85 DEG C after one-level horizontal centrifuge is squeezed into by peristaltic pump, it is separated after shape
Into first separation sand and first separation liquid；
Described first separation sand carries out mixing with water to be squeezed into two grades of horizontal centrifuges and carries out by peristaltic pump again after being sufficiently stirred for
Centrifugation；Secondary separation liquid and secondary separation sand are formed after separated；
The secondary separation sand is centrifuged squeezing into three-stage horizontal type centrifuge by peristaltic pump after mixing and be sufficiently stirred for water
Separate；Formed after separated three times and separate sand and three separating liquids；
Three times separate sand dried and by Multi-stage airflow grader sorted and be recycled process after carborundum into
Product.
2. useless silicon mud recovery and treatment method according to claim 1, is characterized in that, described once to divide in step b
Chaotropic adds a certain amount of filter aid to squeeze into plate and frame filter press by high-pressure pump and carries out press filtration；
The pressing filtering liquid that press filtration is obtained adds activated carbon to be decolourized；
Liquid after decolouring carries out again press filtration process, and the liquid after press filtration passes sequentially through ion exchange resin and carries out ion exchange
And vacuum distillation apparatus carry out distillation dehydration, and obtain polyethylene glycol finished product.
3. useless silicon mud recovery and treatment method according to claim 1, is characterized in that, secondary point formed in step b
Chaotropic is used to be mixed with the useless silicon mud in step a；
Three separating liquids formed in step b are used to be stirred with first separation sand to mix.
4. useless silicon mud recovery and treatment method according to claim 1, is characterized in that, in step a, give up silicon mud and water according to
1:0.8～1:3 mass ratio is mixed, and the amount of the dispersant for being added is that silicon mud per ton adds dispersant 80-200g.
5. useless silicon mud recovery and treatment method according to claim 2, is characterized in that, the amount for adding filter aid is per ton one
Level separating liquid adds filter aid 5kg-20kg；
The amount of added activated carbon is that activated carbon 4.5kg-8kg is added in pressing filtering liquid per ton.
6. useless silicon mud recovery and treatment method according to claim 2, is characterized in that, produce after the distillation of Jing vacuum distillation apparatus
Raw distilled water is used to mix with the stirring of secondary separation sand.
7. useless silicon mud recovery and treatment method according to claim 2, is characterized in that, described filter aid adopts polyacrylamide
Amine, polyamine, polyvinyl alcohol, polyethylene glycol oxide, acrylic acid and methyl olefin(e) acid polymer, calcium oxide, calcium hydroxide, ferric sulfate, sulphur
Sour aluminium, iron chloride, cellulose, modified starch or diatomite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244272.1A CN106629731A (en) | 2016-12-29 | 2016-12-29 | Method for recycling and processing waste silicon mud |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611244272.1A CN106629731A (en) | 2016-12-29 | 2016-12-29 | Method for recycling and processing waste silicon mud |
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| CN106629731A true CN106629731A (en) | 2017-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611244272.1A Pending CN106629731A (en) | 2016-12-29 | 2016-12-29 | Method for recycling and processing waste silicon mud |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107266080A (en) * | 2017-07-03 | 2017-10-20 | 常州赛蓝光伏技术有限公司 | Non-burning brick method is made using useless silicon mud |
| CN107325870A (en) * | 2017-07-19 | 2017-11-07 | 常州赛蓝光伏技术有限公司 | The method for preparing cutting particle loaded fluid is reclaimed using useless silicon mud |
| CN110205440A (en) * | 2018-10-26 | 2019-09-06 | 成亚资源科技股份有限公司 | The processing method that useless silicon mud recycles |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982536A (en) * | 2010-11-02 | 2011-03-02 | 林小妹 | Method for recovering silicon carbide and polyethylene glycol cutting fluid from waste silicon wafer cutting fluid |
| CN103182249A (en) * | 2011-12-30 | 2013-07-03 | 财团法人工业技术研究院 | Method for modifying porous substrate and modified porous substrate |
| CN103288086A (en) * | 2012-01-15 | 2013-09-11 | 佳明新材料科技有限公司 | Recovery method of silicon carbide, silicon powder and polyethylene glycol from cutting fluid of silicon chips |
| CN105886096A (en) * | 2014-12-25 | 2016-08-24 | 江南大学 | Novel method for recycling polyethylene glycol and silicon carbide in silicon wafer cutting waste mortar |
-
2016
- 2016-12-29 CN CN201611244272.1A patent/CN106629731A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101982536A (en) * | 2010-11-02 | 2011-03-02 | 林小妹 | Method for recovering silicon carbide and polyethylene glycol cutting fluid from waste silicon wafer cutting fluid |
| CN103182249A (en) * | 2011-12-30 | 2013-07-03 | 财团法人工业技术研究院 | Method for modifying porous substrate and modified porous substrate |
| CN103288086A (en) * | 2012-01-15 | 2013-09-11 | 佳明新材料科技有限公司 | Recovery method of silicon carbide, silicon powder and polyethylene glycol from cutting fluid of silicon chips |
| CN105886096A (en) * | 2014-12-25 | 2016-08-24 | 江南大学 | Novel method for recycling polyethylene glycol and silicon carbide in silicon wafer cutting waste mortar |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107266080A (en) * | 2017-07-03 | 2017-10-20 | 常州赛蓝光伏技术有限公司 | Non-burning brick method is made using useless silicon mud |
| CN107325870A (en) * | 2017-07-19 | 2017-11-07 | 常州赛蓝光伏技术有限公司 | The method for preparing cutting particle loaded fluid is reclaimed using useless silicon mud |
| CN110205440A (en) * | 2018-10-26 | 2019-09-06 | 成亚资源科技股份有限公司 | The processing method that useless silicon mud recycles |
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