CN101585042B - Aqueous medium physical recovering art for valuable components in waste circuit board and device thereof - Google Patents

Aqueous medium physical recovering art for valuable components in waste circuit board and device thereof Download PDF

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Publication number
CN101585042B
CN101585042B CN200910033825A CN200910033825A CN101585042B CN 101585042 B CN101585042 B CN 101585042B CN 200910033825 A CN200910033825 A CN 200910033825A CN 200910033825 A CN200910033825 A CN 200910033825A CN 101585042 B CN101585042 B CN 101585042B
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diameter
circuit board
sorting bed
aqueous medium
light
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CN101585042A (en
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赵跃民
何亚群
段晨龙
张洪建
贺靖峰
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China University of Mining and Technology CUMT
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China University of Mining and Technology CUMT
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/82Recycling of waste of electrical or electronic equipment [WEEE]

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Abstract

An aqueous medium physical recovering art for the valuable components in the waste circuit board and a device thereof. The aqueous medium physical recovering art comprises: feeding the waste circuit board removing the toxic and harmful components to a wet impact crusher for crushing and stirring, pumping the ore pulp with a pump into a diameter-altered aqueous medium sorting bed arranged obliquelyfor separation of the light products and the heavy products; regulating and filter pressing the light products and the heavy products to obtain a metal concentrate and a nonmetal concentrate. The dev ice is composed of a diameter-altered aqueous medium sorting bed arranged obliquely, a feed device and a light and heavy product treating device. The invention takes the water as medium to recover thevaluable components in the waste circuit board, effectively avoids the dust diffusion and the gas generated by thermal decomposition in the material crushing process, speeds up the crushed product di scharge. The device adopts the diameter-altered aqueous medium sorting bed to sort the fine fraction materials and realizes the high-efficient recovering of the fine fraction materials.

Description

The aqueous medium physical of valuable constituent reclaims technology and equipment thereof in the waste printed circuit board
Technical field
The present invention relates to electron wastes recycling technology, the aqueous medium physical of valuable constituent reclaims technology and equipment thereof in particularly a kind of waste printed circuit board.
Background technology
In recent years, along with the electronic technology high speed development, produced a large amount of electron wastes.Because the electron wastes complicated component causes serious pollution to surrounding environment, brings very big pressure to environmental protection.Printed circuit board (PCB) is the basis of electronics industry, also is industry maximum in the electronic devices and components industry.Not only consumption is big for printed circuit board (PCB), development is fast, and it still is the big difficult point in the electron wastes resource research range.Usually contain 30% plastics, 30% indifferent oxide and 40% metal in the discarded printed circuit boards.Mainly containing hydrometallurgy, pyrometallurgy, mechanical treatment or several kinds of treatment technologies about the waste printed circuit board treatment technology both at home and abroad combines.The patent No. " 98105592 " discloses " a kind of method that is reclaimed valuable material by printed circuit board (PCB) ", this method be with printed circuit board (PCB) successively through shredding, pulverize, bang, efflorescence and isolate metal and nonmetallic substance.Though can realize the recovery of valuable material, whole shattering process is loaded down with trivial details, all materials is crushed to thin especially, need must consume lot of energy through the broken process in four roads.Secondly all are broken material adopts tank to carry out sorting, because thin material hindered falling speed in water is little, so metal sinks for a long time, exists shortcomings such as the efficiency of separation is low.The patent No. " 99102862 " discloses a kind of " process for breaking, separating and recovering of waste printed circuit board and device therefor thereof "; Its technology is with printed circuit board (PCB) coarse crushing, in small, broken bits; Be divided into a lot of ranks through vibratory sieve then; Each rank adopts common airflow separator, realizes that metal separates with nonmetallic.Its shortcoming is that classification is too much, and the common airflow separator efficiency of separation is low, influenced greatly by material shapes; (material 0.074mm) can't be realized effective sorting for fine fraction.Publication number " CN1535760A " discloses " the dry method physics of valuable constituent reclaims technology on the electron wastes integrated circuit board "; This method is through double teeth roller cutter, efficient impact crusher, magnetic separator, classifying screen, eddy current separator, damp type pneumatic separation machine, cylinder electrostatic separator, triboelectric separator with waste printed circuit board; Shear successively, fragmentation, screening, sorting, finally separate that to obtain with aluminium, copper be master's metal concentrate and nonmetallic substance.Though realized comprehensive recovery of valuable constituent on the electron wastes integrated circuit board, whole fragmentation and assorting room are comparatively loaded down with trivial details, need process twice dry milling process and magnetic separation, screening, must consume lot of energy.Shortcomings such as next adopts different screening installations to carry out sorting material crushing and screening to a plurality of grades, exists classification too much, and assorting room is comparatively loaded down with trivial details.And can produce a large amount of pernicious gas and smell in shearing, the impact grinding process, cause severe contamination environment.Publication number " CN1563440A " discloses " physics of metal concentrate reclaims technology in the waste printed circuit board "; Whole flow process all adopts the method for machinery and physical separation; With waste printed circuit board through double teeth roller cutter, efficient impact crusher, magnetic separator, classifying screen, cylinder electrostatic separator, efficient centrifugal separator; Shear successively, fragmentation, screening, sorting, final metal concentrate and the nonmetal enrich body that obtains multiple composition that separate.Though this method can realize comprehensive recovery of valuable constituent on the waste printed circuit board; But also exist fragmentation, classification, assorting room comparatively complicated; Shattering process need consume significant amount of energy; And can produce shortcomings such as a large amount of pernicious gases, contaminated environment, if suitability for industrialized production exists problems such as technology is loaded down with trivial details, the efficiency of separation is not high.
Summary of the invention
Technical problem: it is simple to the purpose of this invention is to provide a kind of technology, no secondary environmental pollution, lower limit of separation is low, good separation effect be the mechanical-physical method and apparatus that medium reclaims valuable constituent in the discarded printed circuit boards with water.
Technical scheme: the aqueous medium physical of valuable constituent reclaims technology in the waste printed circuit board of the present invention:
A. it is the wet method impact crusher of medium that the waste printed circuit board that will remove the poisonous and harmful components and parts is sent into water; Broken with the current in the wet method impact crusher while mixing; Impact the ore pulp that is crushed to below the 2mm grade through the wet method impact crusher, the sieve plate through wet method impact crusher exit flows out;
B. the ore pulp that flows out is sent in the agitator and stirred, ore pulp is squeezed in the diameter-verifying water medium sorting bed that is obliquely installed with the slag stock pump then, ore pulp mixes continuous sorting with the current that reducing sorting bed bottom gets into;
D. light product gets into light product buffer barrel by the road from the overfall on reducing sorting bed top and carries out current stabilization; Send in the light product filter press through the light product of slag stock pump after and to carry out press filtration current stabilization; Obtain purifying that to obtain with resin and glass fibre be master's nonmetal enrich body final can further the separation, the press filtration clear water returns agitator through circulation waterway;
Discharge gate gets into heavy product buffer barrel and carries out current stabilization heavy product by the road from reducing sorting bed bottom; Send in the heavy product filter press through the production thing of slag stock pump after and to carry out press filtration current stabilization; Obtain final can further separate to purify obtain the metal concentrate of metals such as copper, zinc, tin, nickel, the press filtration clear water returns agitator through circulation waterway.
The aqueous medium physical reclaimer of valuable constituent in the waste printed circuit board of the present invention comprises the diameter-verifying water medium sorting bed that is obliquely installed, feeding device that links to each other with diameter-verifying water medium sorting bed pipeline respectively and light, heavy product processing device; Feeding device is linked to each other with slag stock pump pipeline successively by wet method impact crusher, agitator and constitutes; Light product processing device is linked to each other with light product filter press pipeline successively by light product buffer barrel, slag stock pump and constitutes; Heavy product processing device is linked to each other with heavy product filter press pipeline successively by heavy product buffer barrel, slag stock pump and constitutes; Light product filter press links to each other with the agitator pipeline with the delivery port of heavy product filter press; Diameter-verifying water medium sorting bed is tubular, and internal diameter reduces from top to down gradually.
Described wet method impact crusher is by broken body, and the barrel-shaped sieve plate that is located in the broken body constitutes with the tup that is located in the barrel-shaped sieve plate, and the top of broken body is provided with water inlet, and the side is provided with feeding mouth, and the bottom is provided with material collecting tank; Said diameter-verifying water medium sorting bed comprises the cylindrical shell that internal diameter reduces from top to down gradually, is provided with fluid distributor in the cylindrical shell, and the top of cylindrical shell is provided with feeding mouth, and the below is provided with light product outlet and heavy product outlet, and the bottom is provided with inlet valve.
Beneficial effect: with water is that medium reclaims the valuable constituent in the discarded printed circuit boards; To send into the wet method impact crusher through pretreated waste printed circuit board and carry out fragmentation; Effectively avoided the gas that pyrolysis produces in diffusion and the material shattering process of dust; Can also avoid the disintegrating apparatus local temperature too high, quicken the discharge of broken afterproduct simultaneously, the mistake crushing phenomenon in the control shattering process.Whole flow process all adopts the method for wet crushing and wet split; Surpass breakdown products more than 95% to be distributed in-below the 1mm; And-waste printed circuit board metal degree of dissociation below the 1mm surpasses 90%; Therefore breakdown products can directly get into the sorting link, has avoided screening or the graded operation link in the mechanical processes, and technology is simpler.With waste printed circuit board through wet crushing machine, agitator, diameter-verifying water medium sorting bed, filter press; Carry out fragmentation, stirring, sorting, dehydration successively; Finally obtain further to separate purifying and obtain the metal concentrate of noble metals such as copper, zinc, tin, nickel and be master's nonmetal enrich body, solved the difficult problem of waste printed circuit board resource with resin and glass fibre.The diameter-verifying water medium sorting bed efficiency of separation is higher, sorting operating condition broad, and separation velocity is fast, can realize the effective sorting of wide grade multi-component masses by density.Fluid distributor in the diameter-verifying water medium sorting bed helps to produce the steady ascending current that is fit to the bed body structure, improves the uneven distribution of flow velocity in the same cross section.Choose at the solid-liquid two-phase flow branch and can improve waterpower significantly and distribute, improve the efficiency of separation, diameter-verifying water medium sorting bed lower limit of separation almost can arrive zero.The press filtration clear water can be squeezed into agitator again through circulation waterway, has realized that the closed cycle of aqueous medium is used, and helps saving water resource and reduces environmental pollution.Realized the high efficiente callback of micro-size fraction material, it is low to have a lower limit of separation, and environmental pollution is little, and Processes and apparatus is simple, and good separation effect has practicality widely in the present technique field.
Description of drawings
Fig. 1 is an aqueous medium physical removal process block diagram of the present invention.
Fig. 2 is an aqueous medium physical reclaimer system diagram of the present invention.
Fig. 3 is a wet method impact crusher structural representation of the present invention.
Fig. 4 is a diameter-verifying water medium sorting bed structure sketch map of the present invention.
Fig. 5 is a fluid distributor structural representation of the present invention.
Among the figure: 1-wet method impact crusher, 2-agitator, 3-slag stock pump, 4-diameter-verifying water medium sorting bed, the light product buffer barrel of 5-, 6-slag stock pump, the light product filter press of 7-, the heavy product filter press of 8-, 9-slag stock pump, the heavy product buffer barrel of 10-, 11-circulation waterway.The broken body of 1-1-, 1-2-water inlet, 1-3-tup, 1-4-feeding mouth, the barrel-shaped sieve plate of 1-5-, 1-6-material collecting tank, 4-1-cylindrical shell, 4-2-fluid distributor, 4-3-feeding mouth, the light product outlet of 4-4-, the heavy product outlet of 4-5-.
The specific embodiment
To combine accompanying drawing that one embodiment of the present of invention are done further to describe below:
Shown in Figure 1, aqueous medium physical of the present invention reclaims technology: will pass through pretreated waste printed circuit boards such as removing battery, poisonous and harmful components and parts and feed crusher chamber from the feeding mouth 1-4 of wet method impact crusher 1, current get into crusher chamber through water inlet 1-2; Tup 1-3 high-speed motion impacts material; The ore pulp that is crushed to below the 2mm grade flows out from sieve plate 1-5, gets into agitator 2 by the road and stirs, and the ore pulp after will being stirred by slag stock pump 3 is then squeezed in the diameter-verifying water medium sorting bed 4; Water gets into from reducing sorting bed 4 bottoms through water pump; Output is adjustable, and flow of slurry produces the speed change flow field in reducing sorting bed 4, and particle is in the variable motion state all the time in this flow field; According to the difference of storeroom character, realize effective separation the light, heavy material (metal component is with nonmetal); The light material that sorting obtains gets into pan feeding buffer barrel 5, by slag stock pump 6 the light material in the buffer barrel is squeezed into pressing filter 7 then, fully obtains nonmetal enrich body after the press filtration, and the clear water of institute's press filtration gets into through circulation waterway 11 and continues in the agitator 2 to use.The heavy material that sorting obtains gets into pan feeding buffer barrel 10, by slag stock pump 9 heavy material in the buffer barrel is squeezed into pressing filter 8 then, fully obtains metal concentrate after the press filtration, and the clear water of institute's press filtration gets into through circulation waterway 11 and continues in the agitator 2 to use.
Shown in Figure 2; Aqueous medium physical reclaimer of the present invention; Mainly by the diameter-verifying water medium sorting bed 4 that is obliquely installed, feeding device and light, heavy product processing device, the feeding device that links to each other with diameter-verifying water medium sorting bed 4 pipelines respectively with light, weigh product processing device; Feeding device is linked to each other with slag stock pump 3 pipeline successively by wet method impact crusher 1, agitator 2 and constitutes; Light product processing device is linked to each other with light product filter press 7 pipeline successively and is constituted by light product buffer barrel 5, slag stock pump 6; Heavy product processing device is linked to each other with heavy product filter press 8 pipeline successively and is constituted by heavy product buffer barrel 10, slag stock pump 9; Light product filter press 7 links to each other with agitator 2 pipelines with the delivery port of heavy product filter press 8.
Shown in Figure 3; Wet method impact crusher 1 is by broken body 1-1, and the barrel-shaped sieve plate 1-5 that is located in the broken body 1-1 constitutes with the tup 1-3 that is located in the barrel-shaped sieve plate 1-5, and the top of broken body 1-1 is provided with water inlet 1-2; The side is provided with feeding mouth 1-4, and the bottom is provided with material collecting tank 1-6.Some tup 1-3 are housed in broken body 1-1, and the link aperture of tup 1-3 is greater than the diameter of axle, and tup 1-3 is whipping state impact waste printed circuit board in shattering process.Waste printed circuit board gets into crusher chamber by feeding mouth 1-4, and tup 1-3 high-speed motion impacts material.Circuit board obtains energy and flies to the disintegrating machine cavity under the high velocity effect of impacting tup 1-3, the material of rapid speed will receive the second-time breakage effect of cavity and break.There is the partial circuit plate to obtain energy and in disintegrating machine cavity 1-1, rises, fall, is impacted tup 1-3 fragmentation once more, the partial material high-speed motion is also arranged, collide each other and then break with disintegrating machine feed collision back.Current get into crusher chamber through water inlet 1-2, and broken afterproduct is impacted into ore pulp and from sieve plate 1-5, flows out.
Shown in Figure 4; Diameter-verifying water medium sorting bed 4 is tubular, and internal diameter reduces from top to down gradually, and it comprises the cylindrical shell 4-1 that internal diameter reduces from top to down gradually; Be provided with fluid distributor 4-2 in the cylindrical shell 4-1; The top of cylindrical shell 4-1 is provided with feeding mouth 4-3, and the below is provided with light product outlet 4-4 and heavy product outlet 4-5, and the bottom is provided with inlet valve.The tilt adjustable of the diameter-verifying water medium sorting bed 4 that is obliquely installed is about 20 °.
Shown in Figure 5 is fluid distributor 4-2, and fluid distributor 4-2 is the dividing plate that offers some apertures, is located in the diameter-verifying water medium sorting bed 4 at interval, chooses distribution, the raising efficiency of separation in order to improve waterpower at the solid-liquid two-phase flow branch.

Claims (3)

1. the aqueous medium physical of valuable constituent reclaims technology in the waste printed circuit board, it is characterized in that:
A. adopt by broken body (1-1); Be located at the barrel-shaped sieve plate (1-5) in the broken body (1-1) and be located at the wet method impact crusher (1) that the tup (1-3) in the barrel-shaped sieve plate (1-5) constitutes; It is the wet method impact crusher (1) of medium that the waste printed circuit board of removing the poisonous and harmful components and parts is sent into water; Broken with the current in the wet method impact crusher (1) while mixing; Impact the ore pulp that is crushed to below the 2mm grade through wet method impact crusher (1), the sieve plate through wet method impact crusher (1) exit flows out, and directly gets into the sorting link;
B. the ore pulp that flows out is sent in the agitator (2) and stirred; Use slag stock pump (3) ore pulp to be squeezed in the diameter-verifying water medium sorting bed (4) that is obliquely installed then; Diameter-verifying water medium sorting bed (4) comprises the cylindrical shell (4-1) that internal diameter reduces from top to down gradually; Be provided with fluid distributor (4-2) in the cylindrical shell (4-1); The top of cylindrical shell (4-1) is provided with feeding mouth (4-3), and the below is provided with light product outlet (4-4) and heavy product outlet (4-5), and ore pulp mixes continuous sorting with the current that diameter-verifying water medium sorting bed (4) bottom gets into;
C. light product gets into light product buffer barrel (5) by the road from the overfall on diameter-verifying water medium sorting bed (4) top and carries out current stabilization; Through slag stock pump (6) the light product behind the current stabilization is sent in the light product filter press (7) and to be carried out press filtration; Obtain purifying that to obtain with resin and glass fibre be master's nonmetal enrich body final can further the separation, the press filtration clear water returns agitator (2) through circulation waterway (11);
Discharge gate gets into heavy product buffer barrel (10) and carries out current stabilization heavy product by the road from diameter-verifying water medium sorting bed (4) bottom; Through slag stock pump (9) the production thing behind the current stabilization is sent in the heavy product filter press (8) and to be carried out press filtration; Obtain final can further separate to purify obtain the metal concentrate of copper, zinc, tin, nickel metal, the press filtration clear water returns agitator (2) through circulation waterway (11).
2. the aqueous medium physical reclaimer of valuable constituent in the waste printed circuit board that reclaims technology according to claim 1; It comprises the diameter-verifying water medium sorting bed (4) that is obliquely installed, feeding device that links to each other with diameter-verifying water medium sorting bed (4) pipeline respectively and light, heavy product processing device; Said diameter-verifying water medium sorting bed (4) comprises the cylindrical shell (4-1) that internal diameter reduces from top to down gradually; Be provided with fluid distributor (4-2) in the cylindrical shell (4-1); The top of cylindrical shell (4-1) is provided with feeding mouth (4-3); The below is provided with light product outlet (4-4) and heavy product outlet (4-5), and the bottom is provided with inlet valve, and diameter-verifying water medium sorting bed (4) is tubular; Internal diameter reduces from top to down gradually, it is characterized in that: described feeding device is by wet method impact crusher (1), agitator (2) and slag stock pump (3) the pipeline successively formation that links to each other; Light product processing device is by light product buffer barrel (5), slag stock pump (6) formation that links to each other with light product filter press (7) pipeline successively; Heavy product processing device is by heavy product buffer barrel (10), slag stock pump (9) and weight product filter press (8) the pipeline successively formation that links to each other; Light product filter press (7) links to each other with agitator (2) pipeline with the delivery port of heavy product filter press (8); The tilt adjustable of the diameter-verifying water medium sorting bed (4) that is obliquely installed is about 20 °; Described wet method impact crusher (1) is by broken body (1-1); The tup (1-3) that is located at the barrel-shaped sieve plate (1-5) in the broken body (1-1) and is located in the barrel-shaped sieve plate (1-5) constitutes; The top of broken body (1-1) is provided with water inlet (1-2); The side is provided with feeding mouth (1-4), and the bottom is provided with material collecting tank (1-6).
3. the aqueous medium physical reclaimer of valuable constituent in the waste printed circuit board according to claim 2 is characterized in that: said fluid distributor (4-2) is for offering the dividing plate of some apertures.
CN200910033825A 2009-05-31 2009-05-31 Aqueous medium physical recovering art for valuable components in waste circuit board and device thereof Active CN101585042B (en)

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Publication number Priority date Publication date Assignee Title
CN101898196B (en) * 2010-07-23 2012-05-16 中国科学院广州能源研究所 Method and device for recycling electronic waste with complex components
TWI449478B (en) * 2012-09-13 2014-08-11 Jiin Yeeh Ding Entpr Corp Method and apparatus for recycling metal from printed circuit board waste
CN109604024A (en) * 2018-10-31 2019-04-12 株洲鼎端装备股份有限公司 Used Li ion cell crushing-separating apparatus and method
CN114713377B (en) * 2021-02-10 2023-06-02 中国矿业大学 Air flow-coordinated flexible bundling rod rotary friction electric separation device and separation method

Non-Patent Citations (1)

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张洪建 等.湿法破碎在废弃线路板资源化中的应用.《环境工程》.2006,第24卷(第5期),60-63. *

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