CN102228890A - Multistage winnowing-high voltage electrostatic separation method - Google Patents
Multistage winnowing-high voltage electrostatic separation method Download PDFInfo
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Abstract
一种环境保护技术领域的多级风选-高压静电分选方法，通过将多级风选机依次串联后，再将多级风选机的输出端与电选机和非金属收集器相连，采用风力输送待分离的破碎废弃电路板金属与非金属的尺寸为1.20mm-0.02mm的颗粒混合物料进行多级风力分选，其中：第一、第二级风选机等分选得到的混合金属和非金属混合物料再分别进入相应的电选机进行高压静电分选；最后一级或二级风选机分选得到的非金属物料直接进入非金属收集器，进行收集。
A multi-stage winnowing-high-voltage electrostatic sorting method in the field of environmental protection technology. After connecting the multi-stage winnowing machines in series, and then connecting the output ends of the multi-stage winnowing machines with the electric separator and the non-metallic collector, Use wind power to transport the broken waste circuit board metal and non-metallic particle mixture materials with a size of 1.20mm-0.02mm to be separated for multi-stage wind separation, in which: the mixture obtained by the first and second air separators, etc. The metal and non-metal mixed materials enter the corresponding electric separators for high-voltage electrostatic separation; the non-metal materials separated by the last or second air separator directly enter the non-metal collector for collection.
Description
Technical field
What the present invention relates to is a kind of method of environmental protection technical field, specifically is a kind of multistage pneumatic separation-high-pressure electrostatic method for separating that is used for smashing waste circuit board metal and non-metallic particle.
Background technology
At present, China has become production, the consumption big country of household electrical appliances and electronic product.Along with the enforcement of " waste household appliances old for new service " policy, the discarded amount of television set in 2010, refrigerator, washing machine, air-conditioner, computer every year will be above 3,000 ten thousand.In addition, it is superseded to also have every year electronic products such as a large amount of mobile phones, duplicator, facsimile machine, printer to scrap, and waste electronic electrical equipment total amount reaches ten thousand tons of 300-500 every year.Therefore, the annual electronic waste amount of handling of China reaches hundreds of tons, and wherein printed circuit board (PCB) accounts for 4% of total amount greatly.
Tens times of the natural mineral reserve of grade of metal even hundreds of times have important recovery value in the waste printed circuit board.In recent years, metal and nonmetallic method are the methods of wet method gravity separation or selection by winnowing in the broken circuit board of domestic separation.Because thin material is difficult to disperse in liquid, so the very difficult sinking of part metals, it is low that the wet method gravity separation exists the efficiency of separation, product needed dehydration, drying, and problems such as mud and wastewater treatment in the wet method gravity separation.Selection by winnowing is with smashing waste printed circuit board (PCB) machinery powder, is divided into a lot of ranks through vibratory sieve, and each rank adopts airflow separator, and the realization metal separates with nonmetallic substance.Its shortcoming is that the efficiency of separation of airflow separator is low, influenced greatly by material shapes, and (material 0.5mm) can't be realized effective sorting for fine fraction.
The high-pressure electrostatic method for separating is by mechanical driving device metal and nonmetal hybrid particles to be given on the ground connection separate roller surface of rotation, be subjected to anion bombardment that corona electrode produces and charged, metallic particles loses negative electrical charge rapidly by the ground connection transfer roller, stationary electrode attract and under the gravity effect metallic particles fly away from the transfer roller surface, non-metallic particle then keeps institute electronegative, under the electric field force effect, be close to the transfer roller surface, turn to the rear with transfer roller, under the hairbrush brush, thereby realize separating.The high-pressure electrostatic method for separating has characteristics such as cost is low, efficient, simple in structure, pollution-free with air-flow selection by winnowing and the wet concentration ratio that utilizes density contrast, is a kind of typical environmental friendliness technology.
But still face some problem demanding prompt solutions in the high-pressure electrostatic sorting: factor has a strong impact on the stability of assorting room because agglomeration and nuclear power be insufficient etc. for (1) absorption and agglomeration traits of a large amount of fine non-metallic particles when sorting, small particle diameter nonmetal; (2) content of non-metallic material is 75% in the broken circuit board, and a large amount of non-metallic materials enters into the live load that separator strengthens electrostatic separator; (3) under the too high situation of non-metallic material content, the high-pressure electrostatic sorting can't reach higher separative efficiency and bigger output simultaneously; (4) dust raising phenomenon is serious in the course of conveying of material, influences workers ' health.
Summary of the invention
The present invention is directed to the prior art above shortcomings, a kind of multistage pneumatic separation-high-pressure electrostatic method for separating is provided, adopt multistage pneumatic separation-high-pressure electrostatic sorting method that combines to separate the metal and the non-metallic particle of smashing waste circuit board efficiently.
The present invention is achieved by the following technical solutions, the present invention is by after connecting the multistage pneumatic separation machine successively, output with the multistage pneumatic separation machine links to each other with nonmetal gatherer with the high-pressure electrostatic separator again, adopt wind-force to carry smashing waste circuit board metal to be separated and the granulate mixture material of the nonmetallic 1.20mm-0.02mm of being of a size of to carry out multistage pneumatic separating, wherein: hybrid metal that sortings such as first, second grade winnowing machine obtain and non-metal mixture material enter corresponding electrostatic separator more respectively and carry out the high-pressure electrostatic sorting; The non-metallic material that afterbody or the sorting of secondary winnowing machine obtain directly enters nonmetal gatherer, collects.
The air quantity of described multistage pneumatic separating is 2000-10000m
3/ h, blast 3000-10000Pa;
The voltage of described electrostatic separator is 10000-50000V.
The present invention adopts pneumatic separating to reduce the nonmetallic content of high-pressure electrostatic separator charging, and particularly middle small particle diameter non-metallic material is compared with traditional high-pressure electrostatic sorting technology, has improved productive rate, purity and the rate of recovery of metalliferous material.The present invention will solve the problem that separative efficiency that the conventional high-tension electrostatic separation exists is low and yield poorly, and be a sorting new technology of broken circuit board efficiently.
Description of drawings
Fig. 1 is a schematic diagram of the present invention;
Among the figure: the mixed material of 1 smashing waste circuit board, 2 one-level winnowing machines, 3 secondary winnowing machines, 4 force 3 winds select the metal of machine, 5 air blasts, 6 one-level selection by winnowing and non-metallic material, 9-high-pressure electrostatic separator, 10-high-pressure electrostatic separator, the nonmetal gatherer of 11-that non-metallic material, 7 secondary selection by winnowing metals and non-metallic material, 8 force 3 winds select.
The specific embodiment
Below embodiments of the invention are elaborated, present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment
Elect example as with force 3 wind power sorting-secondary high-pressure electrostatic branch:
The mixed material of smashing waste circuit board adopts wind-force to transmit, and whole system is carried out under air-proof condition.The air quantity of multistage pneumatic separating system is 3500m
3/ h, blast 7000Pa; The voltage of electrostatic separator is 25000V.
Present embodiment is by after connecting the multistage pneumatic separation machine successively, output with the multistage pneumatic separation machine links to each other with nonmetal gatherer with electrostatic separator again, adopt wind-force to carry smashing waste circuit board metal to be separated and the granulate mixture material of the nonmetallic 1.20mm-0.02mm of being of a size of to carry out multistage pneumatic separating, wherein: hybrid metal that the sorting of first, second grade winnowing machine obtains and non-metal mixture material enter corresponding electrostatic separator more respectively and carry out the high-pressure electrostatic sorting; The non-metallic material that the sorting of afterbody winnowing machine obtains directly enters nonmetal gatherer, collects.
During separation, material at first to be separated enters three grades of component separation systems as Fig. 1; The material of first order pneumatic separating enters the high-pressure electrostatic separator and carries out sorting; The material of second level pneumatic separating enters the high-pressure electrostatic separator and carries out further sorting; The material of third level pneumatic separating is mainly nonmetal, directly collects as nonmetal.
Table 1 wind-force-high-pressure electrostatic sorting and high-pressure electrostatic sorting contrast.The original broken circuit board mixed powder of high-pressure electrostatic sorting, wherein tenor is 25wt%; Original broken circuit board mixed material tenor after selection by winnowing is brought up to 88wt%.The same 100g material that separates, the productive rate that adopts selection by winnowing-high-pressure electrostatic sorting is 7.75 times of conventional high-tension electrostatic separation, metal purity has improved 5.7 percentage points simultaneously.
Table 1 wind-force-high-pressure electrostatic sorting and high-pressure electrostatic sorting contrast
In the present embodiment, it is that main control parameters is all adjustable that force 3 wind selects air quantity, blast and the wind speed of system.In industrial production and experiment, can determine corresponding technological parameter according to separative efficiency and purity.
More than be the process of force 3 wind power sorting, in practical engineering application, can determine the match condition of corresponding sum of series and high-pressure electrostatic separator according to separative efficiency and purity.
Claims (4)
1. multistage pneumatic separation-high-pressure electrostatic method for separating, it is characterized in that, after the multistage pneumatic separation machine is connected successively, output with the multistage pneumatic separation machine links to each other with nonmetal gatherer with electrostatic separator again, adopt wind-force to carry smashing waste circuit board metal to be separated and the granulate mixture material of the nonmetallic 1.20mm-0.02mm of being of a size of to carry out multistage pneumatic separating, wherein: hybrid metal that sortings such as first, second grade winnowing machine obtain and non-metal mixture material enter corresponding electrostatic separator more respectively and carry out the high-pressure electrostatic sorting; The non-metallic material that afterbody or the sorting of secondary winnowing machine obtain directly enters nonmetal gatherer, collects.
2. multistage pneumatic separation according to claim 1-high-pressure electrostatic method for separating is characterized in that, the air quantity of described multistage pneumatic separating is 2000-10000m
3/ h, blast 3000-10000Pa.
3. multistage pneumatic separation according to claim 1-high-pressure electrostatic method for separating is characterized in that, the voltage of described electrostatic separator is 10000-50000V.
4. multistage pneumatic separation according to claim 1-high-pressure electrostatic method for separating is characterized in that, described smashing waste circuit board metal and the nonmetallic granulate mixture material that is of a size of 1.20mm-0.02mm.
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| CN201110108138XA CN102228890A (en) | 2011-04-28 | 2011-04-28 | Multistage winnowing-high voltage electrostatic separation method |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701551A (en) * | 2012-06-20 | 2012-10-03 | 严正刚 | Harmless treatment process for recycling industrial sludge |
| CN103191825A (en) * | 2013-04-23 | 2013-07-10 | 上海交通大学 | Information safety destruction and recycling method of semiconductor storage medium |
| CN104907255A (en) * | 2015-06-18 | 2015-09-16 | 浙江亚通焊材有限公司 | Device and technology for preparing powder used for high-quality iron-based 3D printing |
| CN107116030A (en) * | 2016-02-25 | 2017-09-01 | 神华集团有限责任公司 | The piece-rate system and separation method of solid mixture |
| CN107538644A (en) * | 2017-09-28 | 2018-01-05 | 张家港市立邦机械有限公司 | A kind of high-efficient low-noise mixed plastic electrostatic separator |
| CN107983649A (en) * | 2017-12-26 | 2018-05-04 | 安徽捷迅光电技术有限公司 | Stone device is removed in a kind of self-priming sorting of tealeaves |
| CN109622231A (en) * | 2018-11-26 | 2019-04-16 | 中国矿业大学 | The friction electrical selection sorting unit and method of electrification are strengthened in a kind of pre- classification |
| CN115555133A (en) * | 2022-10-10 | 2023-01-03 | 王传东 | A reverse-resistance high-voltage electrostatic classification device for extracting metal from waste circuit boards |
| CN115815285A (en) * | 2022-07-21 | 2023-03-21 | 湖南锐异资环科技有限公司 | A method for recovering metal aluminum from secondary aluminum ash |
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| US2135716A (en) * | 1937-02-27 | 1938-11-08 | Ritter Products Corp | Method and apparatus for separating foodstuff of the nature of cocoa beans |
| US4279740A (en) * | 1979-02-19 | 1981-07-21 | Marusho Industrial Co., Ltd. | Light-material segregating method and apparatus |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102701551A (en) * | 2012-06-20 | 2012-10-03 | 严正刚 | Harmless treatment process for recycling industrial sludge |
| CN103191825A (en) * | 2013-04-23 | 2013-07-10 | 上海交通大学 | Information safety destruction and recycling method of semiconductor storage medium |
| CN104907255A (en) * | 2015-06-18 | 2015-09-16 | 浙江亚通焊材有限公司 | Device and technology for preparing powder used for high-quality iron-based 3D printing |
| CN107116030A (en) * | 2016-02-25 | 2017-09-01 | 神华集团有限责任公司 | The piece-rate system and separation method of solid mixture |
| CN107538644A (en) * | 2017-09-28 | 2018-01-05 | 张家港市立邦机械有限公司 | A kind of high-efficient low-noise mixed plastic electrostatic separator |
| CN107983649A (en) * | 2017-12-26 | 2018-05-04 | 安徽捷迅光电技术有限公司 | Stone device is removed in a kind of self-priming sorting of tealeaves |
| CN109622231A (en) * | 2018-11-26 | 2019-04-16 | 中国矿业大学 | The friction electrical selection sorting unit and method of electrification are strengthened in a kind of pre- classification |
| CN115815285A (en) * | 2022-07-21 | 2023-03-21 | 湖南锐异资环科技有限公司 | A method for recovering metal aluminum from secondary aluminum ash |
| CN115555133A (en) * | 2022-10-10 | 2023-01-03 | 王传东 | A reverse-resistance high-voltage electrostatic classification device for extracting metal from waste circuit boards |
| CN115555133B (en) * | 2022-10-10 | 2025-01-24 | 王传东 | A device for reverse resistance high voltage electrostatic classification and extraction of metal from waste circuit boards |
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Application publication date: 20111102 |