CN106737218A - The method for cutting silicon chips of low cost - Google Patents

The method for cutting silicon chips of low cost Download PDF

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Publication number
CN106737218A
CN106737218A CN201611261879.0A CN201611261879A CN106737218A CN 106737218 A CN106737218 A CN 106737218A CN 201611261879 A CN201611261879 A CN 201611261879A CN 106737218 A CN106737218 A CN 106737218A
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China
Prior art keywords
mortar
cutting
liquid
new
cutting liquid
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Pending
Application number
CN201611261879.0A
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Chinese (zh)
Inventor
郝东东
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Jiangsu Aoming Energy Co Ltd
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Jiangsu Aoming Energy Co Ltd
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Priority to CN201611261879.0A priority Critical patent/CN106737218A/en
Publication of CN106737218A publication Critical patent/CN106737218A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/04Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass
    • B24C1/045Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for treating only selected parts of a surface, e.g. for carving stone or glass for cutting
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0007Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a liquid carrier
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B24GRINDING; POLISHING
    • B24CABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
    • B24C9/006Treatment of used abrasive material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The present invention relates to silicon chip cutting technique field, in existing silicon chip cutting technique, because mortar consumption is big, in order to cost-effective, most enterprises using will reclaim mortar be configured to mortar product with new mortar by the way of use, but fresh sand and new cutting liquid use ratio are high during configuration, and subsequent cleaning processes cleaning water consumption is big, cannot recycle, cause production cost higher, in order to solve this technical problem, the present invention provides a kind of method for cutting silicon chips of low cost, by the use ratio for changing fresh sand and new cutting liquid in mortar product allocation plan, with the waste water effective recycling produced to subsequent cleaning processes, the effect of production cost is reduced so as to reach.

Description

The method for cutting silicon chips of low cost
Technical field
The present invention relates to silicon chip cutting technique field, specially a kind of method for cutting silicon chips of low cost.
Background technology
In existing silicon chip cutting technique, because mortar consumption is big, most enterprises are re-used using mortar is reclaimed Mode with cost-effective, the general principle that mortar is reclaimed is:Separation of solid and liquid is carried out to waste mortar using centrifuge, after separation Liquid phase is mainly the dirty liquid for including most of little particles and cutting liquid, and solid phase is the bulky grain carborundum that can be continuing with. Liquid phase is further processed using filter press, little particle is kept completely separate with cutting liquid, what acquisition can continue to use cuts Cut liquid.Then the bulky grain carborundum and cutting liquid that will be reclaimed combine the new cutting liquid mixed configuration of a certain amount of fresh sand, are made tool The mortar product for having cutting power is continuing with, and back and forth carries out.
Existing silicon chip cutting technique generally comprises following steps:
1. cutting machine is cut using mortar product to silicon rod, and cutting is completed, blanking to degumming machine.
2. degumming machine carries out prerinse and degumming, and step includes:
(1) No. 1, No. 2 grooves of degumming machine carry out spray prerinse using running water to crystal bar;
(2) No. 3 groove running water of degumming machine are cleaned by ultrasonic;
(3) No. 4 groove lactic acid degummings of degumming machine.
(4) blanking is to cleaning machine
3. cleaning machine carries out inserted sheet cleaning, and step includes:
(1) No. 1 groove citric acid of cleaning machine is cleaned by ultrasonic;
(2) No. 2 grooves of cleaning machine, No. 3 groove running water overflow ultrasound rinsings;
(3) No. 4 grooves of cleaning machine, No. 5 groove medicaments are cleaned by ultrasonic;
(4) No. 6 grooves of cleaning machine, No. 7 grooves, No. 8 grooves, No. 9 groove pure water overflow rinsings.
(5) blanking is to sorting table;
4. shipment is packed after sorting table sorting inspection.
Wherein, the mortar product in step 1 is formed by new mortar and the configuration of online mortar, and concrete configuration method is:
(1) new mortar configuration:
Fresh sand and recovery sand are according to 9:, into sand, new cutting liquid and recovery cutting liquid are according to 5 for 1 proportional arrangement:5 ratio is matched somebody with somebody It is set to cutting liquid;
By sand, cutting liquid according to 1:1 proportional arrangement is the suspension of 1.660-1.670kg/L into density, is stirred 8 hours Laggard line density monitoring, meets new mortar standard (such as table 1) and is configured for mortar product afterwards.
The new mortar standard of table 1
(2) online mortar configuration:
The antiquated sand pulp density for producing will be cut and be diluted to 1.5-1.6kg/L, be then separated into centrifuge and once weighed Liquid and a light liquid.Carry out press filtration to a light liquid with filter press again, produce online recycling cutting liquid;
Add and reconciled during online recycling cutting liquid is added into a heavy-fluid, by the density of a heavy-fluid adjust to 1.55-1.6kg/L, is then separated into secondary heavy-fluid and secondary light liquid with centrifuge by a heavy-fluid again.With filter press to secondary Light liquid carries out press filtration, produces online recycling cutting liquid.Reconciled during online recycling cutting liquid is added into secondary heavy-fluid, will be secondary The density of heavy-fluid is adjusted to 1.680-1.685kg/L, as online mortar.
(3) mortar product configuration:
The new mortar and online mortar that complete will be configured according to 2:8 ratio is mixed into mortar product, and stirring 2 hours is laggard Line density is monitored, and meeting mortar product standard (such as table 2) is used to cut afterwards.
The mortar product standard of table 2
There is following defect in above-mentioned processing step:
1. fresh sand, new cutting liquid use ratio are high in mortar product configuration, and fresh sand ratio is 90%, and new cutting liquid proportional is 50%, production cost is high;
2. degumming machine spray is big with running water usage amount, and production cost is high, waste water resource.
3. cleaning machine rinsing Water usage is big, No. 2 grooves of cleaning machine, No. 3 groove running water overflow rinsings, No. 6 grooves, No. 7 grooves, 8 Number groove, No. 9 groove pure water overflows rinsings, production cost are high, waste water resource.
The content of the invention
For the problems of the prior art, the present invention provides a kind of method for cutting silicon chips of low cost.
To realize above technical purpose, the technical scheme is that:A kind of method for cutting silicon chips of low cost, its step Including:
A. cutting machine is cut using mortar product to silicon rod, and cutting is completed, blanking to degumming machine.
B. degumming machine originally Water spray prerinse;
C. degumming machine running water is cleaned by ultrasonic;
D. degumming machine lactic acid degumming, blanking to cleaning machine;
E. cleaning machine citric acid is cleaned by ultrasonic;
F. cleaning machine running water overflow ultrasound rinsing;
G. cleaning machine medicament is cleaned by ultrasonic;
H. cleaning machine pure water overflow rinsing, blanking to sorting table;
I. shipment is packed after sorting table sorting inspection.
The collocation method of mortar product is in the step A:
A. new mortar configuration:
Fresh sand and recovery sand are according to 6:, into sand, new cutting liquid and recovery cutting liquid are according to 1 for 4 proportional arrangement:9 ratio is matched somebody with somebody It is set to cutting liquid;
By sand, cutting liquid according to 1:1 proportional arrangement is the suspension of 1.660-1.670kg/L into density, is stirred 8 hours Laggard line density monitoring, configures after meeting new mortar standard for mortar product, and new mortar standard is as follows:
D50 values:9.40-12.00;
Little particle adds up (0-5.13um):< 5%;
Particle diameter is concentrated accumulative (7.50-13.31um):≥80;
The largest particles (19.50um):< 0.15%;
25 DEG C of pH value:5.0-7.5;
Electrical conductivity (us/cm):< 30;
Viscosity (mPas):240-320;
25 DEG C of proportion (kg/L):1.665-1.670;
Moisture content:≤ 0.5%.
B. online mortar configuration:
The waste mortar cutting liquid for producing will be cut and be diluted to 1.5-1.6kg/L.Then the waste mortar that will have been diluted with from Scheming is separated into a heavy-fluid and a light liquid.Carry out press filtration to a light liquid with filter press again, produce online recycling cutting liquid;
Add and reconciled during online recycling cutting liquid is added into a heavy-fluid, by the density of a heavy-fluid adjust to 1.55-1.6kg/L, is then separated into secondary heavy-fluid and secondary light liquid with centrifuge by a heavy-fluid again.With filter press to secondary Light liquid carries out press filtration, produces online recycling cutting liquid.Reconciled during online recycling cutting liquid is added into secondary heavy-fluid, will be secondary The density of heavy-fluid is adjusted to 1.680-1.685kg/L, as online mortar.
C. mortar product configuration:
The new mortar and online mortar that complete will be configured according to 2:8 ratio is mixed into mortar product, and stirring 2 hours is laggard Line density is monitored, and is used to cut after meeting mortar product standard, and mortar product standard is as follows:
D50 values:8.65-9.40;
Little particle adds up (0-5.13um):< 6%;
Particle diameter is concentrated accumulative (7.50-13.31um):≥80;
The largest particles (19.50um):< 0.2%;
25 DEG C of pH value:5.0-7.5;
Electrical conductivity (us/cm):< 30;
Viscosity (mPas):200-280;
25 DEG C of proportion (kg/L):1.675-1.680;
Moisture content:≤ 0.8%.
From the above, it can be seen that the advantage that the present invention possesses is:Fresh sand, new cutting liquid are used in mortar product configuration Ratio reduction, fresh sand ratio is 60%, and new cutting liquid proportional is 10%, effectively reduces production cost.
Used as improvement, the mortar product in the step A is also added with dispersant;Dispersant is used to improve mortar flowing Property, prevent mortar bonding die.
Used as improvement, the waste water produced in the step B is reused for step B after being processed through filter press press filtration;Waste water pressure Reused after filter, reduce production cost, saving water resource.
Used as improvement, the waste water produced in the step F is reused for step B after being processed through filter press press filtration;Waste water pressure Reused after filter, reduce production cost, saving water resource.
Used as improvement, the waste water produced in the step H is used for step F;The waste water produced in step H is used for step F, weight It is multiple to utilize, reduce production cost, saving water resource.
From the above, it can be seen that the present invention possesses advantages below:
1. fresh sand, the reduction of new cutting liquid use ratio in mortar product configuration, fresh sand ratio is 60%, newly cuts liquid proportional It is 10%, effectively reduces production cost;
2. it is reused for spraying prerinse after the waste water press filtration that the prerinse of degumming machine spray is produced, recycles, reduces Production cost, has saved water resource.
3. cleaning machine running water overflow is reused for degumming machine spray prerinse after being cleaned by ultrasonic the waste water press filtration for producing, and follows Ring is utilized, and reduces production cost, has saved water resource.
4. the waste water after cleaning machine pure water overflow rinsing is cleaned by ultrasonic for running water overflow, and a water is dual-purpose, reduces life Cost is produced, water resource has been saved.
Brief description of the drawings
Fig. 1 is process chart of the invention.
Fig. 2 is water circulation use flow chart of the present invention.
Specific embodiment
With reference to Fig. 1, a specific embodiment of the invention is described in detail, but any limit is not done to claim of the invention It is fixed.
As shown in figure 1, a kind of method for cutting silicon chips of low cost, its step includes:
A. cutting machine is cut using mortar product to silicon rod, and cutting is completed, blanking to degumming machine.
B. degumming machine carries out prerinse, degumming to the silicon rod after cutting, and step includes:
A. No. 1 groove originally Water spray prerinse of degumming machine
B. No. 2 groove running water of degumming machine are cleaned by ultrasonic;
C. No. 3 groove lactic acid degummings of degumming machine, blanking to cleaning machine;
C. cleaning machine carries out inserted sheet cleaning
A. No. 1 groove citric acid of cleaning machine is cleaned by ultrasonic;
B. No. 2 grooves of cleaning machine, No. 3 groove running water overflow ultrasound rinsings;
C. No. 4 grooves of cleaning machine, No. 5 groove medicaments are cleaned by ultrasonic;
D. No. 6 grooves of cleaning machine, No. 7 grooves, No. 8 grooves, No. 9 groove pure water overflow rinsings.
Wherein, the mortar product in step A is formed by new mortar and the configuration of online mortar, and concrete configuration method is:
A. new mortar configuration:
Fresh sand and recovery sand are according to 9:, into sand, new cutting liquid and recovery cutting liquid are according to 5 for 1 proportional arrangement:5 ratio is matched somebody with somebody It is set to cutting liquid;
By sand, cutting liquid according to 1:1 proportional arrangement is the suspension of 1.660-1.670kg/L into density, is stirred 8 hours Laggard line density monitoring, meets new mortar standard (such as table 1) and is configured for mortar product afterwards.
The new mortar standard of table 1
B. online mortar configuration:
To cut the antiquated sand pulp density for producing be diluted to 1.5-1.6kg/L (during first production, it is necessary to new cutting liquid or Cutting liquid dilution waste mortar is reclaimed, after starting production, when there is online recycling cutting liquid to produce, is diluted with online recycling cutting liquid Waste mortar), then it is separated into a heavy-fluid and a light liquid with centrifuge.Light liquid is pressed with filter press again Filter, produces online recycling cutting liquid;
Add and reconciled during online recycling cutting liquid is added into a heavy-fluid, by the density of a heavy-fluid adjust to 1.55-1.6kg/L, is then separated into secondary heavy-fluid and secondary light liquid with centrifuge by a heavy-fluid again.With filter press to secondary Light liquid carries out press filtration, produces online recycling cutting liquid.Reconciled during online recycling cutting liquid is added into secondary heavy-fluid, will be secondary The density of heavy-fluid is adjusted to 1.680-1.685kg/L, as online mortar.
C. mortar product configuration:
The new mortar and online mortar that complete will be configured according to 2:8 ratio is mixed into mortar product, and stirring 2 hours is laggard Line density is monitored, and meeting mortar product standard (such as table 2) is used to cut afterwards.
The mortar product standard of table 2
Because the ratio of new cutting liquid in mortar product is relatively low, mortar mobility weakens, and easily sand occurs during section blanking Slurry deposition bonding die, causes sliver problem, in order to make up this problem, chemical industry dispersion is further introduced in mortar product Agent, to improve mortar mobility, it is ensured that section quality.
In order to ensure quality of cutting into slices, make up because of the cutting power that fresh sand in mortar product and new cutting liquid proportional reduction bring Decline problem, when being cut, suitably can increase finished product mortar on original Process ba- sis.
Because originally water consumption is big in cleaning step, to being recycled after each step water reuse filter press simple process, Including:
1. degumming machine originally Water spray prerinse water consumption is big, therefore the waste water for being produced introduces wastewater disposal basin, then through pressure Reuse pool is introduced after filter treatment, the water of reuse pool is used for degumming machine and sprays prerinse, so that production cost is reduced, while Saving water resource.
2. because the ultrasound overflow rinsing of cleaning machine running water and pure water overflow rinsing water amount are big, and pure water overflow rinsing is produced Raw waste water cleanliness factor is higher, meets running water ultrasound overflow rinsing water standard, therefore the waste water that pure water overflow rinsing is produced For running water ultrasound overflow rinsing, to reduce production cost, while saving water resource.
3. the waste water for being produced after pair cleaning machine running water ultrasound overflow rinsing introduces wastewater disposal basin, after then being processed through filter press Reuse pool is introduced, the water of reuse pool is used for degumming machine originally Water spray prerinse, same to reduce production cost and save water Resource.
As a example by cutting 680,000 silicon chips, former technique and new technology of the present invention contrast are as follows:
Former technique:
1. when new mortar is configured in mortar product configuration, fresh sand and recovery sand are according to 9:1 proportional arrangement, new cutting liquid and Cutting liquid is reclaimed according to 5:5 proportional arrangement.It is 35kg per knife fresh sand consumption, new cutting liquid consumption is 19.5kg.
2. per knife mortar product consumption 390kg.
3. degumming machine originally Water spray prerinse waste water, cleaning machine running water ultrasound overflow poaching wastewater and pure water overflow drift Waste water is washed not recycle.
New technology:
1. when new mortar is configured in mortar product configuration, fresh sand and recovery sand are according to 6:4 proportional arrangement, new cutting liquid and Cutting liquid is reclaimed according to 1:9 proportional arrangement.It is 17.2kg per knife fresh sand consumption, new cutting liquid consumption is 4.3kg.
2. per knife mortar product consumption 430kg.
3. degumming machine originally Water spray prerinse waste water, cleaning machine running water ultrasound overflow poaching wastewater and pure water overflow drift Waste water is washed to recycle according to the method described in the present invention.
Monolithic Cost comparisons such as table 3.
The former technique of table 3 and new technology monolithic Cost comparisons
Cut respectively with former technique and new technology, cutting yield contrast table 4.
The former technique of table 4 is contrasted with new technology yield
As can be seen that using after new technology, monolithic cost is reduced, but has no effect on cutting effect from above-mentioned contrast, into Product yield maintains an equal level with former technique substantially, has no too big change.
In sum, the present invention has advantages below:
1. fresh sand, the reduction of new cutting liquid use ratio in mortar product configuration, fresh sand ratio is 60%, newly cuts liquid proportional It is 10%, effectively reduces production cost;
2. chemical industry dispersant is introduced in mortar product, mortar mobility is improved, to make up mortar product because of new cutting Low the brought mortar deposition bonding die problem of liquid allocation ratio, it is ensured that section quality.
3. it is reused for spraying prerinse after the waste water press filtration that the prerinse of degumming machine spray is produced, recycles, reduces Production cost, has saved water resource.
4. cleaning machine running water overflow is reused for degumming machine spray prerinse after being cleaned by ultrasonic the waste water press filtration for producing, and follows Ring is utilized, and reduces production cost, has saved water resource.
5. the waste water after cleaning machine pure water overflow rinsing is cleaned by ultrasonic for running water overflow, and a water is dual-purpose, reduces life Cost is produced, water resource has been saved.
It is understood that above with respect to specific descriptions of the invention, being merely to illustrate the present invention and being not limited to this Technical scheme described by inventive embodiments.It will be understood by those within the art that, still the present invention can be repaiied Change or equivalent, to reach identical technique effect;As long as satisfaction uses needs, all within protection scope of the present invention.

Claims (5)

1. a kind of method for cutting silicon chips of low cost, its step includes:
A. cutting machine is cut using mortar product to silicon rod, and cutting is completed, blanking to degumming machine.
B. degumming machine originally Water spray prerinse;
C. degumming machine running water is cleaned by ultrasonic;
D. degumming machine lactic acid degumming, blanking to cleaning machine;
E. cleaning machine citric acid is cleaned by ultrasonic;
F. cleaning machine running water overflow ultrasound rinsing;
G. cleaning machine medicament is cleaned by ultrasonic;
H. cleaning machine pure water overflow rinsing, blanking to sorting table;
I. shipment is packed after sorting table sorting inspection.
The collocation method of mortar product is in the step A:
A. new mortar configuration:
Fresh sand and recovery sand are according to 6:, into sand, new cutting liquid and recovery cutting liquid are according to 1 for 4 proportional arrangement:9 proportional arrangement into Cutting liquid;
By sand, cutting liquid according to 1:1 proportional arrangement into density for 1.660-1.670kg/L suspension, stirring 8 hours it is laggard Line density is monitored, and is configured for mortar product after meeting new mortar standard, and new mortar standard is as follows:
D50 values:9.40-12.00;
Little particle adds up (0-5.13um):< 5%;
Particle diameter is concentrated accumulative (7.50-13.31um):≥80;
The largest particles (19.50um):< 0.15%;
25 DEG C of pH value:5.0-7.5;
Electrical conductivity (us/cm):< 30;
Viscosity (mPas):240-320;
25 DEG C of proportion (kg/L):1.665-1.670;
Moisture content:≤ 0.5%.
B. online mortar configuration:
The waste mortar cutting liquid for producing will be cut and be diluted to 1.5-1.6kg/L.Then the waste mortar centrifuge that will have been diluted It is separated into a heavy-fluid and a light liquid.Carry out press filtration to a light liquid with filter press again, produce online recycling cutting liquid;
Reconciled being added in an online recycling cutting liquid heavy-fluid of addition, the density of a heavy-fluid is adjusted to 1.55- 1.6kg/L, is then separated into secondary heavy-fluid and secondary light liquid with centrifuge by a heavy-fluid again.Secondary light liquid is entered with filter press Row press filtration, produces online recycling cutting liquid.Reconciled during online recycling cutting liquid is added into secondary heavy-fluid, by secondary heavy-fluid Density is adjusted to 1.680-1.685kg/L, as online mortar.
C. mortar product configuration:
The new mortar and online mortar that complete will be configured according to 2:8 ratio is mixed into mortar product, and stirring carries out close after 2 hours Degree monitoring, is used to cut after meeting mortar product standard, and mortar product standard is as follows:
D50 values:8.65-9.40;
Little particle adds up (0-5.13um):< 6%;
Particle diameter is concentrated accumulative (7.50-13.31um):≥80;
The largest particles (19.50um):< 0.2%;
25 DEG C of pH value:5.0-7.5;
Electrical conductivity (us/cm):< 30;
Viscosity (mPas):200-280;
25 DEG C of proportion (kg/L):1.675-1.680;
Moisture content:≤ 0.8%.
2. it is according to claim 1 low cost method for cutting silicon chips, it is characterised in that:Finished sand in the step A Slurry is also added with dispersant.
3. it is according to claim 1 low cost method for cutting silicon chips, it is characterised in that:What is produced in the step B is useless Water is reused for step B after being processed through filter press press filtration.
4. it is according to claim 1 low cost method for cutting silicon chips, it is characterised in that:What is produced in the step F is useless Water is reused for step B after being processed through filter press press filtration.
5. it is according to claim 1 low cost method for cutting silicon chips, it is characterised in that:What is produced in the step H is useless Water is used for step F.
CN201611261879.0A 2016-12-30 2016-12-30 The method for cutting silicon chips of low cost Pending CN106737218A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN108807594A (en) * 2018-06-12 2018-11-13 山东大海新能源发展有限公司 A kind of solar panel processing-waste circulation recycle system
CN108821490A (en) * 2018-06-12 2018-11-16 山东大海新能源发展有限公司 A kind of solar panel processing disintegrating system in waste pipe for realizing near-zero release

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CN102234379A (en) * 2010-09-25 2011-11-09 蒙特集团(香港)有限公司 Method for reducing use amount of new silicon carbide abrasive in solar silicon wafer cutting mortar
KR20130060470A (en) * 2011-11-30 2013-06-10 오씨아이 주식회사 High efficiency recycling method and system for sawing liquid in waste sludge formed by semiconductor and solar cell wafer using membrane process
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108807594A (en) * 2018-06-12 2018-11-13 山东大海新能源发展有限公司 A kind of solar panel processing-waste circulation recycle system
CN108821490A (en) * 2018-06-12 2018-11-16 山东大海新能源发展有限公司 A kind of solar panel processing disintegrating system in waste pipe for realizing near-zero release

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