CN102205573A - Method for separating and purifying recycled plastics in waste electronic apparatus - Google Patents
Method for separating and purifying recycled plastics in waste electronic apparatus Download PDFInfo
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- CN102205573A CN102205573A CN2011101206525A CN201110120652A CN102205573A CN 102205573 A CN102205573 A CN 102205573A CN 2011101206525 A CN2011101206525 A CN 2011101206525A CN 201110120652 A CN201110120652 A CN 201110120652A CN 102205573 A CN102205573 A CN 102205573A
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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
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
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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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Abstract
The invention provides a method for separating and purifying recycled plastics in a waste electronic apparatus and relates to a method for separating and purifying plastics in a waste electronic apparatus. The plastics can be separated from metal impurities by using systematized techniques of combinational breaking and combinational screening. Different plastics can be separated from each other by using techniques of circulating breaking, flotation and high-pressure electrostatic separation. After being separated and purified, a single-component thermoplastic plastic particle product which mainly contains PS (polystyrene), PP (polypropylene), ABS (acrylonitrile butadiene styrene), PVC (poly vinyl chloride), and the like, is acquired. The product purity reaches 95%. The method has the obvious advantages of high separating effect, high plastic purity, large handling capacity, high comprehensive recovery rate, and the like.
Description
Technical field
The present invention relates to the isolation and purification method of plastics in a kind of waste and old electric electrical equipment, belong to the chemical metallurgy technical field.
Background technology
Plastics are widely used in the various electronic and electrical equipments, along with these electronic apparatus enter the date of retirement in a large number, waste plastics proportion in municipal solid wastes is more and more higher, and the regeneration of plastics in the waste and old electric electrical equipment has been become social question of common concern.In China, electronic apparatus accounts for 10～20% of plastics total flow with plastics, modal kind comprises ABS, PP, PS, PVC etc., have the higher utilization of resources and be worth, use the 3kg plastics with every computer, television set uses the 4kg plastics, refrigerator uses the 5kg plastics, mobile phone uses 100g to calculate, and these electric equipment products of scrapping will produce waste or used plastics up to more than 500,000 tons every year, abandons arbitrarily or mishandling meeting causes the serious environmental pollution.Therefore no matter still be the environmental protection angle from the angle that economizes on resources; all require effectively to reclaim and regeneration fully to these waste plastics are realized; not only can save the bulk petroleum resource and save a large amount of energy; simultaneously significantly alleviate environmental pressure, help the development of human health and social civilization.
The at present relevant technology that waste plastics recovery separates in the waste and old electric electrical equipment is based on following two aspects: (1) plastics separate with metal, i.e. separating by separation means realization plastics and iron, copper aluminium.(2) separation of mixed plastic promptly realizes the separation of variety classes plastics by separation means, to obtain the higher plastics of purity.Domestic on the plastics isolation technics with big gap is abroad arranged, see the following form.From development trend, mechanical dry method isolation technics makes the developing direction of plastics separation and recovery technology from now on.
Summary of the invention
The objective of the invention is to propose a kind of isolation and purification method that can overcome plastics in the waste and old electric electrical equipment above the whole bag of tricks defective, that conveniently produce, improve the rate of recovery.
The present invention includes following steps:
1) letter sorting is disassembled: after the letter sorting of waste and old electric electrical equipment category, with the manual parts of isolating plastics with the mechanical mode of disassembling and containing plastics;
2) fragmentation: plastics and the parts that contain plastics by coarse crushing, two-stage fragmentation in small, broken bits, are dissociated plastics and metal, other impurity things, and the while is removed impurity such as dust, fiber fragment in the negative pressure mode of gathering dust, the acquisition broken material;
3) magnetic separation: from broken material, magnetisable material is separated by magnetic separator;
4) eddy current electric separation: copper aluminium is separated acquisition mixed plastic material by the eddy current electrostatic separator;
5) circulation is broken: the mixed plastic material is broken by circulation, and make its particle diameter less than 5mm;
6) plastics purifying: successively the mixed plastic material of particle diameter less than 5mm sorted and purifying by suspension selection by winnowing and high-pressure electrostatic sorting.
The present invention has solved the key technology difficult problem that plastics separate with metal impurities with the systematization technology of combined crushing-compounding separation; Solved the key technology difficult problem that the variety classes plastics are separated from each other with the fragmentation that circulates, suspension selection by winnowing, high-pressure electrostatic sorting technology.Plastics are through separation and purification in the waste and old electric electrical equipment, and final recovery obtains the single component thermoplastic grain products based on PS, PP, ABS, PVC etc., and product purity can reach〉95%.The present invention has remarkable advantages such as good separating effect, plastics purity height, treating capacity are big, comprehensive recovery height.
The concrete technical scheme of fragmentation of the present invention is: be to carry out the low speed primary fragmentation under the condition of 40～80r/min at the rotating speed of cutter to the plastics disassembled and the parts that contain plastics, tear up, shear, roll effect by cutter, be broken into granularity less than 10cm fritter plastics, then the fritter plastics are placed carry out in the airtight high speed puy second-time breakage to raw meal particle size less than 3cm, by negative pressure Soft flocks, dust etc. are extracted simultaneously and separate.The bump that produces by high speed rotating tool in the puy, rub, rub broken effect and make thoroughly dissociating of plastics and iron, copper aluminium and other impurity things.
Magnetic separation of the present invention is that the material after the fragmentation is sent in the cylinder magnetic separator of rotating speed 150～180r/m, surface induction intensity 600～800mT, absorption and separating ferrum pledge from broken material, the irony thing after the separation and select excess to discharge from feed opening separately respectively.
The alternating magnetic field highest frequency of eddy current electrostatic separator of the present invention is 460 Hz, and the pole surface magnetic field intensity is 480～960 kA/m, and magnetic roller rotating speed is 2500-2800 r/min.Slice plastic particle and copper aluminium are discharged from the feed opening that respectively carries vibration screen respectively, and wherein not separated dust, sandy soil, rubble etc. are separated by vibration screen.Resulting sheet mixed plastic particles containing metal and other impurity are less than 0.5%, and the plastics recovery rate is greater than 96%.
Plastics purifying of the present invention is the plastics purification system that constitutes with circulation pulverizing, suspension selection by winnowing and high-pressure electrostatic sorting.The PS that according to type obtains respectively after purified, PP, ABS, PVC plastic grain product, product purity is greater than 95%, and the rate of recovery is greater than 96%.
Wherein, the present invention's fragmentation that circulates is: after cracking and sorting is removed metal and other impurity, the coarse grain plastics enter in the disintegrating machine to be pulverized, wherein the disintegrating machine wall adopts sandwich design, is connected with recirculated water in the interlayer to reduce body temperature, under the pulverizer vibratory sieve is set, the sieve diameter 5mm of vibratory sieve, plastic grain carries out classification through vibratory sieve, and the coarse granule plastics greater than 5mm on the sieve return fragmentation again in the disintegrating machine, and enter the suspension air classifier less than the 5mm plastic grain carries out purifying one time to sieve down.
The suspension selection by winnowing: the difference according to the relative density of plastics can realize being separated from each other of variety classes plastics, based on PP density minimum in the mixed plastic of PS, PP, ABS, PVC, and PVC density maximum, ABS is close with PS density.Therefore the most segregative is the PP plastics, and mixed plastic particles is at the effect low suspension of bottom air-flow and rise in the suspension air classifier, and light plastic is blown in the separator and separates.Suspension selection by winnowing progression is 3 grades, controlled wind speed 1.2-1.5m/s.Plastic grain can obtain purity respectively after the suspension selection by winnowing〉90%PP plastics, purity〉90%PVC plastics, ABS and PS mixed plastic.Above-mentioned plastic grain send into respectively carry out in the high-tension electrostatic classifier secondarily purified.
The high-pressure electrostatic sorting: purity does not meet the requirements of plastics or mixed plastic particles drops into high-tension electrostatic separator again behind a purifying, carries out secondarily purified.Plastic grain has the character of frictional electrification, and frictional electrification is in proper order: (positive charge) ABS〉PET〉PS〉PE〉PP〉PVC (negative electrical charge).At first in friction cyclone, stir with the PET material, make plastics by frictional electrification, according to plastic friction chargeding performance difference, contact and provide the high-voltage electrostatic field with rotary electrode with the plastics of frictional electrification, because the compound action of centrifugal force and electrostatic force, be to throw away the plastic grain that falls from rotary electrode to present different tracks and produce certain distance, carry out categorised collection with the container of being with dividing plate, thereby realize the sorting and the purifying of variety classes plastics owing to current potential is different.Plastic grain carries out frictional electrification after treatment in PET friction cyclone, free-falling is then carried out purifying to the high pressure electrostatic separator.The control technology condition is: friction cyclone material is PET, friction velocity 18-20m/s, fraction time 60s; High-pressure electrostatic electric-field intensity 400～500kv/m, 3 grades of high-pressure electrostatic sorting progression.
Advantage of the present invention:
1, the present invention is a kind of method for a kind of complete mechanical dry type separation recovery waste plastics, does not need chemical reagent and parting liquid, has the advantage of separative efficiency height, product purity height, cleanliness without any pollution.
2, the present invention has realized rapidly and efficiently separating of waste plastics and metal, other impurity with two-stage fragmentation, magnetic separation, the combined cracking and sorting technology of eddy current electric separation; Compare traditional hand-sorted, single selection by winnowing, magnetic separation or electric separation separation method, not only metal and other impurity removal efficacy height, and also disposal ability is big.
3, the present invention with suspension selection by winnowing and high-pressure electrostatic sorting combined sort purification technique, realized the meticulous separation of mixed plastic, compare with traditional water partition method, floatation, solvent segregation do not have waste water, the discharging of lean solution, waste plastics uniform component after purified, the purity height, can be directly use remarkable in economical benefits originally as the plastic products of high added value.
The specific embodiment
Operating procedure:
1, letter sorting is disassembled: waste and old electric electrical equipment is according to sorting such as kinds such as TV, computer, air-conditioning, washing machine, refrigerator ice cabinet, other electronic apparatus, then disassemble and carry out craft on the platform and add mechanical type flowing water and disassemble operation, finish the process of disassembling from outside to inside at automatic transport formula physics.Plastics that separate or plastic components are according to type stacked and are stored, to make things convenient for subsequent treatment.
2, fragmentation: to the plastic casing disassembled, contain plastic components etc. and carry out the low speed primary fragmentation, the rotating speed of cutter is 40～80r/min, tear up, shear, roll effect by cutter, make the bulk plastics be broken into granularity less than 10cm fritter plastics, then carry out second-time breakage to the airtight high speed puy, the bump that produces by high speed rotating tool, rub, rub broken effect and make thoroughly dissociating of plastics and iron, copper aluminium and other impurity things by conveyor delivery.The broken material granularity extracts Soft flocks, dust etc. by negative pressure simultaneously and separates less than 3cm.
3, magnetic separation: the mass transport after the fragmentation is entered cylinder magnetic separator, index drum rotating speed 150-180r/m, surface induction intensity 600-800mT adsorbs and the separating ferrum pledge from broken material, finishes and separates back irony thing and select excess respectively from feed opening discharge separately.
4, eddy current electric separation: the mass transport after the magnetic separation is entered eddy current electrostatic separator continuation separation remove copper aluminium, control alternating magnetic field highest frequency 460 Hz, pole surface magnetic field intensity 480～960 kA/m, magnetic roller rotating speed 2500-2800 r/min.Slice plastic particle and copper aluminium are discharged from the feed opening that respectively carries vibration screen respectively, and wherein not separated dust, sandy soil, rubble etc. are separated by vibration screen.
5, circulation is broken: after cracking and sorting is removed metal and other impurity, the coarse grain plastics enter in the cycle crushing machine and pulverize, wherein the disintegrating machine wall adopts sandwich design, is connected with recirculated water in the interlayer to reduce body temperature, and the plastics granularity is less than 5mm after the fragmentation that circulates.Under the pulverizer vibratory sieve is set, vibratory sieve sieve diameter 5mm, through the vibratory sieve classification, plastic grain returns fragmentation on the sieve, and the following plastic grain of sieve enters the suspension air classifier and carries out purifying one time.
6, suspension selection by winnowing: based on PP density minimum in the mixed plastic of PS, PP, ABS, PVC, PVC density maximum, ABS is close with PS density.The most segregative is the PP plastics, and mixed plastic particles is at the effect low suspension of bottom air-flow and rise in the suspension air classifier, and light plastic is blown in the separator and separates.Suspension selection by winnowing progression is 3 grades, controlled wind speed 1.2-1.5m/s.Plastic grain can obtain PP plastics, PVC plastics, ABS and PS mixed plastic respectively after the suspension selection by winnowing.Above-mentioned plastic grain send into respectively carry out in the high-tension electrostatic classifier secondarily purified.
7, high-pressure electrostatic sorting: the control technology condition is: friction cyclone material is PET, fraction time 60s; High-pressure electrostatic electric-field intensity 400～500kv/m, 3 grades of high-pressure electrostatic sorting progression.
Purity does not meet the requirements of plastics or mixed plastic particles drops into high-tension electrostatic separator again behind a purifying, carries out secondarily purified.The plastic grain free-falling enters to be carried out frictional electrification and handles in the friction cyclone of PET material, then fall into and carry out purifying in the high-tension electrostatic separator.
Respectively waste and old television set thermoplastic, waste and old washing machine thermoplastic and waste refrigerators thermoplastic are carried out separation and purification by above method of operating, the result is as follows:
1, the separation and purification of waste and old television set thermoplastic
The thermoplastic that obtain of waste and old television set after letter sorting is disassembled comprises 4 kinds of PS, PP, BAS, PVC etc., comprise shell and contain plastic components etc., the proportion of composing of mixed plastic is: PS82.4%, PP8.7%, PVC3.1%, ABS1.6%, Fe and alloy 2.2%, CuAl and alloy 0.8%, other impurity 1.2%.
Above-mentioned mixed plastic carries out primary fragmentation, second-time breakage, magnetic separation, the processing of eddy current electric separation successively, behind cracking and sorting, and the sheet mixed plastic that obtains, mixed plastic containing metal and other impurity 0.42%, the mixed plastic rate of recovery 97.68%.Be higher than 0.5% as mixed plastic containing metal and impurity, can return once more and handle.
After the fragmentation that circulates, suspension selection by winnowing, high-pressure electrostatic sorting were handled successively, the plastic grain technical target of the product that obtains after purified saw the following form through the mixed plastic behind the cracking and sorting.
| Title | Purity | The rate of recovery | Productive rate |
| PS | 95.88% | 96.71% | 81.2% |
| ABS | 95.25% | 96.59% | 1.58% |
| PP | 97.52% | 97.45% | 8.5% |
| PVC | 96.74% | 97.43% | 3.05% |
2, the separation and purification of waste and old washing machine thermoplastic
The thermoplastic that obtain of waste and old washing machine after letter sorting is disassembled comprises 4 kinds of PS, PP, BAS, PVC etc., comprise shell and contain plastic components etc., the proportion of composing of mixed plastic is: PS6.8%, PP79.7%, PVC6.8%, ABS3.9%, Fe and alloy 1.8%, CuAl and alloy 0.1%, other impurity 1.0%.
Above-mentioned mixed plastic carries out primary fragmentation, second-time breakage, magnetic separation, the processing of eddy current electric separation successively, behind cracking and sorting, and the sheet mixed plastic that obtains, the mixed plastic rate of recovery 97.55%; Mixed plastic containing metal and other impurity 0.48%.Be higher than 0.5% as thermoplasticity mixed plastic containing metal and impurity, can return once more and handle.
After the fragmentation that circulates, suspension selection by winnowing, high-pressure electrostatic sorting were handled successively, the plastic grain technical target of the product that obtains after purified saw the following form through the mixed plastic behind the cracking and sorting.
| Title | Purity | The rate of recovery | Productive rate |
| PS | 95.67% | 96.65% | 6.7% |
| ABS | 95.08% | 96.33% | 3.85% |
| PP | 98.32% | 98.01% | 77.50% |
| PVC | 95.82% | 96.97% | 6.71% |
3, the separation and purification of waste refrigerators thermoplastic
The processing of waste refrigerators is slightly different with other waste and old electric electrical equipment.Complete machine is directly handled after disassembling compressor and outside heat sink.Carry out primary fragmentation, second-time breakage, magnetic separation, the processing of eddy current electric separation successively, behind cracking and sorting, products such as the sheet mixed plastic that obtains respectively, iron, copper aluminium, polyurethane foam particle, wherein polyurethane foam is reclaimed separately in the negative pressure dust collecting system.The thermoplasticity mixed plastic rate of recovery 96.58%; Resulting mixed plastic constituent is: PS34.68%, PP32.59%, PVC10.64%, ABS21.61%, containing metal and other impurity 0.48%.Be higher than 0.5% as thermoplasticity mixed plastic containing metal and impurity, can return once more and handle.
Above-mentioned mixed plastic is after the fragmentation that circulates, suspension selection by winnowing, high-pressure electrostatic sorting are handled successively, and the plastic grain technical target of the product that obtains after purified sees the following form:
| Title | Purity | The rate of recovery | Productive rate |
| PS | 95.37% | 95.48% | 33.53% |
| ABS | 95.18% | 96.77% | 21.21% |
| PP | 97.62% | 97.36% | 31.39% |
| PVC | 95.41% | 97.22% | 10.47% |
Claims (7)
1. a waste and old electric electrical equipment reclaims the isolation and purification method of plastics, it is characterized in that may further comprise the steps:
1) letter sorting is disassembled: after the letter sorting of waste and old electric electrical equipment category, with the manual parts of isolating plastics with the mechanical mode of disassembling and containing plastics;
2) fragmentation: plastics and the parts that contain plastics by coarse crushing, two-stage fragmentation in small, broken bits, are dissociated plastics and metal, other impurity things, and the while is removed dust, fiber fragment impurity in the negative pressure mode of gathering dust, the acquisition broken material;
3) magnetic separation: from broken material, magnetisable material is separated by magnetic separator;
4) eddy current electric separation: copper and aluminium are separated acquisition mixed plastic material by the eddy current electrostatic separator;
5) circulation is broken: the mixed plastic material is broken by circulation, and make its particle diameter less than 5mm;
6) plastics purifying: successively the mixed plastic material of particle diameter less than 5mm sorted and purifying by suspension selection by winnowing and high-pressure electrostatic sorting.
2. 1 described waste and old electric electrical equipment reclaims the isolation and purification method of plastics as requested, it is characterized in that described fragmentation is: with rotating speed is that the cutter of 40～80r/min makes the bulk plastics be broken into granularity less than 10cm fritter plastics, then the fritter plastics are placed carry out in the airtight high speed puy second-time breakage to raw meal particle size less than 3cm, by negative pressure Soft flocks and dust are extracted simultaneously and separate.
3. 1 described waste and old electric electrical equipment reclaims the isolation and purification method of plastics as requested, it is characterized in that described magnetic separator is that rotating speed is that 150～180r/m, surface induction intensity are the cylinder magnetic separator of 600～800mT.
4. 1 described waste and old electric electrical equipment reclaims the isolation and purification method of plastics as requested, the alternating magnetic field highest frequency that it is characterized in that described eddy current electrostatic separator is 460 Hz, the pole surface magnetic field intensity is 480～960 kA/m, and magnetic roller rotating speed is 2500～2800 r/min.
5. 1 described waste and old electric electrical equipment reclaims the isolation and purification method of plastics as requested, it is characterized in that the disintegrating machine machine wall when described circulation is broken adopts sandwich design, adopts the recirculated water cooling in interlayer.
6. 1 described waste and old electric electrical equipment reclaims the isolation and purification method of plastics as requested, and the progression that it is characterized in that described suspension selection by winnowing is 3 grades, and wind speed is 1.2～1.5m/s.
7. 1 described waste and old electric electrical equipment reclaims the isolation and purification method of plastics as requested, and when it is characterized in that described high-pressure electrostatic sorting: friction cyclone material is PET, friction velocity 18～20m/s, fraction time 60s; High-pressure electrostatic electric-field intensity 400～500kv/m, 3 grades of high-pressure electrostatic sorting progression.
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Cited By (13)
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| CN102615738A (en) * | 2012-04-09 | 2012-08-01 | 魏冠然 | Process for separating metal layers from nonconductive substrate by high-voltage discharge |
| CN103057026A (en) * | 2013-01-06 | 2013-04-24 | 上海帮容环保科技有限公司 | Production process of regeneration product of mixed plastic sorted from municipal domestic wastes |
| CN104178633A (en) * | 2014-08-18 | 2014-12-03 | 台州伟博环保设备科技有限公司 | Yellow scrap copper recovery production line |
| CN105268546A (en) * | 2014-05-27 | 2016-01-27 | 广州金南磁塑有限公司 | Material sorting method |
| CN105576315A (en) * | 2015-12-21 | 2016-05-11 | 江西源丰有色金属有限公司 | Method for recycling crushed waste storage battery shells |
| CN107511945A (en) * | 2016-06-17 | 2017-12-26 | 江西格林美资源循环有限公司 | A kind of regeneration treating method and its device of electronic waste plastics |
| CN108927912A (en) * | 2018-06-08 | 2018-12-04 | 安徽国生新材料有限公司 | A kind of separation and recovery method of waste plastic |
| CN109366807A (en) * | 2018-12-06 | 2019-02-22 | 湘南学院 | A kind of mechanical intelligence method for fine finishing sorting various material from comprehensive waste plastics |
| CN110328207A (en) * | 2019-05-27 | 2019-10-15 | 昌鑫生态科技(陕西)有限公司 | Waste ammunition environmental protection is recycled technology |
| CN111590785A (en) * | 2020-06-02 | 2020-08-28 | 南京浦世环境科技发展有限公司 | Method for preparing wood-plastic composite material by using waste mask |
| CN112192787A (en) * | 2019-07-08 | 2021-01-08 | 潍坊赢道物资中心 | Method for recycling secondary materials of plastic shell of lead-acid storage battery |
| CN113618965A (en) * | 2021-07-30 | 2021-11-09 | 江西格林循环产业股份有限公司 | Purification and regeneration process and equipment for waste refrigerator plastic |
| CN114800938A (en) * | 2021-05-10 | 2022-07-29 | 上海睿聚环保科技有限公司 | Sorting mode of recycled plastics and application thereof |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102615738A (en) * | 2012-04-09 | 2012-08-01 | 魏冠然 | Process for separating metal layers from nonconductive substrate by high-voltage discharge |
| CN103057026A (en) * | 2013-01-06 | 2013-04-24 | 上海帮容环保科技有限公司 | Production process of regeneration product of mixed plastic sorted from municipal domestic wastes |
| CN105268546A (en) * | 2014-05-27 | 2016-01-27 | 广州金南磁塑有限公司 | Material sorting method |
| CN104178633A (en) * | 2014-08-18 | 2014-12-03 | 台州伟博环保设备科技有限公司 | Yellow scrap copper recovery production line |
| CN105576315A (en) * | 2015-12-21 | 2016-05-11 | 江西源丰有色金属有限公司 | Method for recycling crushed waste storage battery shells |
| CN107511945B (en) * | 2016-06-17 | 2023-05-16 | 江西格林循环产业股份有限公司 | Regeneration treatment method and device for electronic waste plastic |
| CN107511945A (en) * | 2016-06-17 | 2017-12-26 | 江西格林美资源循环有限公司 | A kind of regeneration treating method and its device of electronic waste plastics |
| CN108927912A (en) * | 2018-06-08 | 2018-12-04 | 安徽国生新材料有限公司 | A kind of separation and recovery method of waste plastic |
| CN109366807A (en) * | 2018-12-06 | 2019-02-22 | 湘南学院 | A kind of mechanical intelligence method for fine finishing sorting various material from comprehensive waste plastics |
| CN110328207A (en) * | 2019-05-27 | 2019-10-15 | 昌鑫生态科技(陕西)有限公司 | Waste ammunition environmental protection is recycled technology |
| CN112192787A (en) * | 2019-07-08 | 2021-01-08 | 潍坊赢道物资中心 | Method for recycling secondary materials of plastic shell of lead-acid storage battery |
| CN111590785A (en) * | 2020-06-02 | 2020-08-28 | 南京浦世环境科技发展有限公司 | Method for preparing wood-plastic composite material by using waste mask |
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Application publication date: 20111005 |