CN113399440B - Treatment process for preparing pure copper powder by using waste circuit board - Google Patents

Treatment process for preparing pure copper powder by using waste circuit board Download PDF

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Publication number
CN113399440B
CN113399440B CN202110813484.1A CN202110813484A CN113399440B CN 113399440 B CN113399440 B CN 113399440B CN 202110813484 A CN202110813484 A CN 202110813484A CN 113399440 B CN113399440 B CN 113399440B
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Prior art keywords
copper powder
stirring
circuit board
particles
flotation
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CN202110813484.1A
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CN113399440A (en
Inventor
韩秀东
袁胜巧
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Anhui Lvzhou Danger Waste Comprehensive Utilization Co ltd
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Anhui Lvzhou Danger Waste Comprehensive Utilization Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C17/00—Disintegrating by tumbling mills, i.e. mills having a container charged with the material to be disintegrated with or without special disintegrating members such as pebbles or balls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
    • B03D—FLOTATION; DIFFERENTIAL SEDIMENTATION
    • B03D1/00—Flotation
    • B03D1/14—Flotation machines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling
    • 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
    • Y02W30/82—Recycling of waste of electrical or electronic equipment [WEEE]

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Biotechnology (AREA)
  • Processing Of Solid Wastes (AREA)

Abstract

The invention discloses a treatment process for preparing pure copper powder by using waste circuit boards, which specifically comprises the following steps: s1, dismantling a waste circuit board and crushing the waste circuit board into circuit board particles; s2, carrying out flotation after magnetic separation on the circuit board particles, and removing nonmetallic particles to obtain a metal concentrate; step S3, grinding the metal enriched body into enriched body powder, preparing concentrated body slurry with water in copper powder flotation equipment, adding a reagent, performing flotation, and cleaning, precipitating and drying the copper particles after flotation to obtain pure copper powder; the method removes the waste metal particles through twice flotation, separates the copper particles through twice flotation to obtain pure copper powder with the purity of 96 percent, and has simple whole preparation process, easily controlled process and less pollution to the environment; copper particles in the concentrate slurry are quickly floated on the surface by using copper powder flotation equipment, so that the flotation efficiency and the flotation effect are improved.

Description

Treatment process for preparing pure copper powder by using waste circuit board
Technical Field
The invention belongs to the technical field of waste circuit board resource recovery, and particularly relates to a treatment process for preparing pure copper powder by using a waste circuit board.
Background
With the acceleration of the updating speed of the electronic and electric products, a large number of waste circuit boards are generated, and the waste circuit boards are various in variety and complex in components and generally consist of a mixture of resin, glass fiber, plastic and various metals. On the one hand, the waste circuit board contains a large amount of toxic and harmful chemical substances, such as: the soldering points of the electronic element contain lead, the substrate contains polychlorinated biphenyl and polybrominated diphenyl ether, the infrared detector, the SMD resistor and other components also contain cadmium, mercury and chromium, the bromine-containing flame retardant and the polycyclic aromatic hydrocarbon are persistent organic pollutants, are not easy to be metabolized by organisms, and have negative effects on ecological environment and human health. On the other hand, in order to achieve better service performance of the circuit board, a large amount of precious metals are added into the circuit board, and the circuit board is a resource concentrate containing rare precious metals such as gold, silver, platinum, rhodium and the like and basic metals such as copper, iron, aluminum, zinc, nickel and the like, and particularly the copper content in the waste circuit board exceeds 20 percent and is much higher than the grade of common copper ores.
In recent years, the market has increasingly increased demands for pure copper powder, and the preparation of the pure copper powder into superfine copper powder or nanoscale copper powder has the properties of small size effect, surface interface effect, quantum tunneling effect and the like, so that the pure copper powder has extremely important application value in the industries of metallurgy, chemical industry, electronics, national defense, medicine, nuclear technology, aerospace and the like. Therefore, how to recycle the waste circuit board to prepare the pure copper powder has positive significance.
Disclosure of Invention
The invention aims to provide a treatment process for preparing pure copper powder by using a waste circuit board, which solves the problems of complex treatment process of the waste circuit board and low purity of the prepared copper powder in the prior art.
The aim of the invention can be achieved by the following technical scheme:
a treatment process for preparing pure copper powder by using waste circuit boards specifically comprises the following steps:
step S1: removing components on the surface of the waste circuit board, adding the removed components into a hammer crusher, starting the hammer crusher to work, and crushing the waste circuit board into circuit board particles with the granularity of 0.15-0.3mm under the condition that the rotating speed is 2000-3000 r/min;
step S2: carrying out magnetic separation on the circuit board particles to remove ferromagnetic metal particles in the circuit board particles, preparing the circuit board particles and water into mixed slurry with the concentration of 100-120g/L, carrying out flotation under the conditions that the rotating speed is 1800-2200r/min and the aeration quantity is 100L/h, and removing floating nonmetallic particles to obtain a precipitated metal concentrate;
step S3: ball milling the metal concentrate to obtain concentrate powder with the particle size of 0.05-0.1mm, and mixing the concentrate powder with water according to the weight ratio of 100g: the method comprises the steps of adding the 1L dosage ratio into a stirring box of copper powder flotation equipment to obtain concentrated slurry, sequentially adding sodium sulfide, sec-octyl alcohol and butyl xanthate into a feed hopper, starting a stirring motor and a foam scraping motor, performing flotation on the concentrated slurry, and cleaning, precipitating and drying copper particles collected in the foam collecting box to obtain pure copper powder.
Further, the weight ratio of sodium sulfide, sec-octanol, butyl xanthate and the concentrate slurry in step S3 is 0.015:0.02:0.02:100.
Further, copper powder flotation equipment, including frame, box subassembly, inflation rabbling mechanism and scrape bubble mechanism, the box subassembly is installed in the frame top, and the box subassembly includes agitator tank and bubble collecting box, agitator tank and bubble collecting box fixed connection, the top installation of agitator tank is fixed with the mounting panel, and one side installation of agitator tank is fixed with the feeder hopper, inflation rabbling mechanism installs on the mounting panel, scrape bubble mechanism and install in one side that the agitator tank top is close to the bubble collecting box.
Further, the bottom end of one side of the stirring box, which is far away from the bubble collecting box, is provided with a water outlet, and the bottom end of one side of the bubble collecting box, which is far away from the stirring box, is provided with a discharge outlet.
Further, aerify rabbling mechanism includes motor support and bobbin subassembly, motor support's bottom and mounting panel fixed connection, motor support's one side installation is fixed with agitator motor, agitator motor's output installation is fixed with first driving pulley, the bobbin subassembly includes the bobbin body, the bobbin body runs through the mounting panel, and bobbin support's top is fixed with the bobbin support, bobbin support's bottom and mounting panel upper surface fixed connection, it has the air inlet to open on the bobbin body, the air inlet is located the mounting panel below and communicates with bobbin body inside, installs the intake pipe on the air inlet, the free end bending of intake pipe upwards just is located one side top of mounting panel, and bobbin body's bottom one side is equipped with the inlet pipe, the one end and the bobbin body fixed intercommunication of inlet pipe, the other end of inlet pipe runs through agitator tank lateral wall and the inside bottom intercommunication of feeder hopper, and bobbin body inside rotation is connected with the (mixing) shaft, the top installation of (mixing) shaft is fixed with first driven pulley, and the bottom mounting of (mixing) shaft is fixed with the bulk cargo tray, the bulk cargo tray is fixed with the bulk cargo tray on the bottom of bobbin body, bulk cargo tray and blade match with one side of mounting panel and inside of the bobbin body are the through-shaped as the centre of a plurality of center of circle, the bulk cargo tray and a plurality of centre of circle of center of tray match, the bulk cargo tray is the centre of circle of a plurality of a circle of tray and the center of a plurality of tray and the center of the bulk cargo.
Further, scrape bubble mechanism and scrape bubble support including scraping bubble motor, speed reducer, pivot, scrape bubble motor and speed reducer and all be fixed in one side that the mounting panel upper surface is close to the feeder hopper, scrape the output of bubble motor and the output of speed reducer and pass through the shaft coupling transmission and be connected, the output installation of speed reducer is fixed with the second driving pulley, two it is opposite to be fixed in the top of agitator tank to scrape the bubble support, the pivot is rotated and is installed between two and scrape bubble support, and the one end installation of pivot is fixed with the second driven pulley, the second driven pulley passes through belt drive with the second driving pulley and is connected, is fixed with the horizontal pole that two opposition set up in the pivot, the both ends of horizontal pole all are fixed with and scrape the bubble board, scrape bubble board and agitator tank edge matched with.
The invention has the beneficial effects that:
removing surface components from a waste circuit board, crushing the waste circuit board into circuit board particles, carrying out magnetic separation to remove ferromagnetic metal particles, carrying out flotation without adding any medicament to remove non-metal particles to obtain metal concentrates, grinding the metal concentrates into concentrate powder, adding water to prepare concentrate slurry, adding the concentrate slurry into a stirring box of copper powder flotation equipment, adding an activating agent sodium sulfide, a foaming agent sec-octyl alcohol and a capturing agent butyl xanthate to carry out flotation treatment, scraping floating foam to obtain copper particles, and finally washing, precipitating and drying to obtain copper powder with high purity; the method removes the waste metal particles through twice flotation, separates the copper particles through twice flotation to obtain pure copper powder with the purity of 96 percent, and has simple whole preparation process, easily controlled process and less pollution to the environment;
according to the copper powder flotation device, the copper powder flotation device is used, the chemical in the feed hopper can be sucked into the bobbin body from the feed pipe while air is fed through the air inlet pipe, and the chemical and air are mixed into the concentrated slurry, so that the chemical and the concentrated slurry are fully contacted, and the chemical aggregation phenomenon is avoided; the generated bubbles can adsorb more copper particles combined with the medicament in the process of floating upwards from the bottom of the stirring tank, so that the copper particles in the slurry of the enriched body quickly float to the surface, the flotation efficiency and the flotation effect are improved, and finally the copper powder with high purity is obtained.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic elevational view of the copper powder flotation apparatus of the present invention;
fig. 2 is a schematic side view of copper powder flotation apparatus of the present invention;
fig. 3 is a schematic top view of the copper powder flotation apparatus of the present invention;
FIG. 4 is a schematic view of the structure of the pneumatic stirring mechanism of the present invention;
FIG. 5 is a schematic illustration of the mechanism of the spool assembly of the present invention;
fig. 6 is a schematic structural view of the bulk material tray of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1. a frame; 2. a housing assembly; 201. a stirring tank; 202. a bubble collecting box; 203. a water outlet; 204. a discharge port; 205. a feed hopper; 206. a mounting plate; 3. an inflatable stirring mechanism; 301. a motor bracket; 302. a stirring motor; 303. a first driving pulley; 304. a first driven pulley; 305. a spool assembly; 3051. a bobbin body; 3052. a bobbin holder; 3053. an air inlet; 3054. a feed pipe; 306. an air inlet pipe; 307. a stirring shaft; 308. stirring paddles; 309. a bulk tray; 3091. a blade; 3092. a through hole; 4. a foam scraping mechanism; 401. a bubble scraping motor; 402. a speed reducer; 403. a second driving pulley; 404. a second driven pulley; 405. a rotating shaft; 406. a foam scraping bracket; 407. a cross bar; 408. a foam scraping plate.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
A treatment process for preparing pure copper powder by using waste circuit boards specifically comprises the following steps:
step S1: removing components on the surface of the waste circuit board, adding the removed components into a hammer crusher, starting the hammer crusher to work, and crushing the waste circuit board into circuit board particles with the granularity of 0.15mm under the condition of the rotating speed of 2000 r/min;
step S2: carrying out magnetic separation on the circuit board particles to remove ferromagnetic metal particles in the circuit board particles, preparing the circuit board particles and water into mixed slurry with the concentration of 100g/L, carrying out flotation under the condition that the rotating speed is 1800r/min and the aeration amount is 100L/h, and removing floating nonmetallic particles to obtain a precipitated metal concentrate;
step S3: ball milling is carried out on the metal enrichment to obtain enrichment powder with the particle size of 0.05mm, and 100g of enrichment powder and water are obtained: the 1L dosage ratio is added into a stirring box 201 of copper powder flotation equipment to obtain enriched slurry, then sodium sulfide, sec-octanol and butyl xanthate are sequentially added into a feed hopper 205, a stirring motor 302 and a foam scraping motor 401 are started to perform flotation on the enriched slurry, and copper particles collected in a foam collecting box 202 are cleaned, precipitated and dried to obtain pure copper powder.
Example 2
A treatment process for preparing pure copper powder by using waste circuit boards specifically comprises the following steps:
step S1: removing components on the surface of the waste circuit board, adding the removed components into a hammer crusher, starting the hammer crusher to work, and crushing the waste circuit board into circuit board particles with the granularity of 0.2mm under the condition of the rotating speed of 2500 r/min;
step S2: carrying out magnetic separation on the circuit board particles to remove ferromagnetic metal particles in the circuit board particles, preparing the circuit board particles and water into mixed slurry with the concentration of 110g/L, carrying out flotation under the condition that the rotating speed is 2000r/min and the aeration quantity is 100L/h, and removing floating nonmetallic particles to obtain a precipitated metal concentrate;
step S3: ball milling is carried out on the metal enrichment to obtain enrichment powder with the particle size of 0.08mm, and 100g of enrichment powder and water are obtained: the 1L dosage ratio is added into a stirring box 201 of copper powder flotation equipment to obtain enriched slurry, then sodium sulfide, sec-octanol and butyl xanthate are sequentially added into a feed hopper 205, a stirring motor 302 and a foam scraping motor 401 are started to perform flotation on the enriched slurry, and copper particles collected in a foam collecting box 202 are cleaned, precipitated and dried to obtain pure copper powder.
Example 3
A treatment process for preparing pure copper powder by using waste circuit boards specifically comprises the following steps:
step S1: removing components on the surface of the waste circuit board, adding the removed components into a hammer crusher, starting the hammer crusher to work, and crushing the waste circuit board into circuit board particles with the granularity of 0.3mm under the condition of the rotating speed of 3000 r/min;
step S2: carrying out magnetic separation on the circuit board particles to remove ferromagnetic metal particles in the circuit board particles, preparing the circuit board particles and water into mixed slurry with the concentration of 120g/L, carrying out flotation under the condition that the rotating speed is 2200r/min and the aeration amount is 100L/h, and removing floating nonmetallic particles to obtain a precipitated metal concentrate;
step S3: ball milling is carried out on the metal enrichment to obtain enrichment powder with the particle size of 0.1mm, and 100g of enrichment powder and water are obtained: the 1L dosage ratio is added into a stirring box 201 of copper powder flotation equipment to obtain enriched slurry, then sodium sulfide, sec-octanol and butyl xanthate are sequentially added into a feed hopper 205, a stirring motor 302 and a foam scraping motor 401 are started to perform flotation on the enriched slurry, and copper particles collected in a foam collecting box 202 are cleaned, precipitated and dried to obtain pure copper powder.
The weight ratios of sodium sulfide, sec-octanol, butyl xanthate and concentrate slurry in step S3 of examples 1-3 above were all 0.015:0.02:0.02:100.
Referring to fig. 1-6, the copper powder flotation device in the foregoing embodiment includes a frame 1, a box assembly 2, an inflatable stirring mechanism 3 and a foam scraping mechanism 4, wherein the box assembly 2 is mounted on the top end of the frame 1, the box assembly 2 includes a stirring box 201 and a foam collecting box 202, the stirring box 201 and the foam collecting box 202 are fixedly connected, a mounting plate 206 is fixedly mounted on the top end of the stirring box 201, a feeding hopper 205 is fixedly mounted on one side of the stirring box 201, the inflatable stirring mechanism 3 is mounted on the mounting plate 206, and the foam scraping mechanism 4 is mounted on one side, close to the foam collecting box 202, above the stirring box 201.
A water outlet 203 is arranged at the bottom end of one side, far away from the foam collecting box 202, of the stirring box 201, and a discharge outlet 204 is arranged at the bottom end of one side, far away from the stirring box 201, of the foam collecting box 202.
The aeration stirring mechanism 3 comprises a motor bracket 301 and a bobbin assembly 305, wherein the bottom end of the motor bracket 301 is fixedly connected with a mounting plate 206, a stirring motor 302 is fixedly arranged on one side of the motor bracket 301, a first driving pulley 303 is fixedly arranged at the output end of the stirring motor 302, the bobbin assembly 305 comprises a bobbin body 3051, the bobbin body 3051 penetrates through the mounting plate 206, a bobbin bracket 3052 is fixedly arranged above the bobbin body 3051, the bottom end of the bobbin bracket 3052 is fixedly connected with the upper surface of the mounting plate 206, an air inlet 3053 is formed in the bobbin body 3051, the air inlet 3053 is positioned below the mounting plate 206 and is communicated with the inside of the bobbin body 3051, an air inlet pipe 306 is arranged on the air inlet 3053, the free end of the air inlet 306 is bent upwards and is positioned above one side of the mounting plate 206, a feed pipe 3054 is arranged on one side of the bottom end of the bobbin body 3051, one end of inlet pipe 3054 and bobbin body 3051 fixed intercommunication, the other end of inlet pipe 3054 runs through agitator tank 201 lateral wall and the inside bottom intercommunication of feeder hopper 205, and bobbin body 3051 inside rotates to be connected with (mixing) shaft 307, the top installation of (mixing) shaft 307 is fixed with first driven pulley 304, first driven pulley 304 passes through belt drive with first driving pulley 303 and is connected, and stirring rake 308 is installed to the bottom of (mixing) shaft 307, and the bottom mounting of bobbin body 3051 has bulk cargo tray 309, bulk cargo tray 309 cooperatees with stirring rake 308, and one side of bulk cargo tray 309 is fixed with a plurality of blades 3091, and a plurality of blades 3091 are circular array distribution with bulk cargo tray 309 center as the centre of a circle, and the center of bulk cargo tray 309 is opened there is through-hole 3092, through-hole 3092 cooperatees with the bottom of bobbin body 3051.
The foam scraping mechanism 4 comprises a foam scraping motor 401, a speed reducer 402, a rotating shaft 405 and foam scraping supports 406, the foam scraping motor 401 and the speed reducer 402 are both fixed on one side, close to the feeding hopper 205, of the upper surface of the mounting plate 206, the output end of the foam scraping motor 401 is connected with the output end of the speed reducer 402 through a coupling in a transmission mode, the output end of the speed reducer 402 is fixedly provided with a second driving pulley 403, the two foam scraping supports 406 are oppositely fixed to the top end of the stirring tank 201, the rotating shaft 405 is rotatably arranged between the two foam scraping supports 406, one end of the rotating shaft 405 is fixedly provided with a second driven pulley 404, the second driven pulley 404 is connected with the second driving pulley 403 through a belt in a transmission mode, two oppositely arranged cross bars 407 are fixed on the rotating shaft 405, and two ends of each cross bar 407 are fixedly provided with foam scraping plates 408, and the foam scraping plates are matched with the edge of the stirring tank 201.
The working principle of the copper powder flotation equipment is as follows:
when the copper powder flotation equipment is used, enriched slurry is firstly added into the stirring box 201, then sodium sulfide, sec-octanol and butyl xanthate are added into the feeding hopper 205, sodium sulfide is used as an activating agent, sec-octanol is used as a foaming agent, butyl xanthate is used as a capturing agent, the stirring motor 302 and the foam scraping motor 401 are started, the output end of the stirring motor 302 drives the stirring shaft 307 to rotate through belt pulley transmission, the stirring shaft 307 drives the stirring paddle 308 to rotate, the stirring paddle 308 is matched with the bulk tray 309, negative pressure is formed at the inner bottom end of the bobbin body 3051, air is sucked from the air inlet pipe 306, meanwhile, the medicament in the feeding hopper 205 is sucked into the bobbin body 3051 from the feeding pipe 3054, and is further discharged into the stirring box 201 from the bottom end of the bobbin body 3051, so that more copper particles can be adsorbed into the enriched slurry, copper particles in the enriched slurry can float on the surface in the process of upwards floating the stirring box 201, the output end of the foam scraping motor 401 drives the copper particles 405 to rotate through belt pulley transmission, the foam particles in the copper particles in the enriched slurry are scraped into the rotating box 408, and finally the foam particles are discharged from the surface of the copper slurry is discharged from the rotating box 408, and the foam particles are collected.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely illustrative and explanatory of the principles of the invention, as various modifications and additions may be made to the specific embodiments described, or similar thereto, by those skilled in the art, without departing from the principles of the invention or beyond the scope of the appended claims.

Claims (5)

1. Copper powder flotation equipment for preparing pure copper powder by utilizing a waste circuit board is characterized by comprising a frame (1), a box assembly (2), an inflatable stirring mechanism (3) and a foam scraping mechanism (4), wherein the box assembly (2) is arranged at the top end of the frame (1), the box assembly (2) comprises a stirring box (201) and a foam collecting box (202), the stirring box (201) and the foam collecting box (202) are fixedly connected, a mounting plate (206) is fixedly arranged at the top end of the stirring box (201), a feed hopper (205) is fixedly arranged at one side of the stirring box (201), the inflatable stirring mechanism (3) is arranged on the mounting plate (206), and the foam scraping mechanism (4) is arranged at one side, above the stirring box (201), close to the foam collecting box (202);
a water outlet (203) is formed in the bottom end of one side, far away from the foam collecting box (202), of the stirring box (201), and a discharge outlet (204) is formed in the bottom end of one side, far away from the stirring box (201), of the foam collecting box (202);
the inflatable stirring mechanism (3) comprises a motor support (301) and a bobbin assembly (305), the bottom end of the motor support (301) is fixedly connected with a mounting plate (206), a stirring motor (302) is fixedly arranged on one side of the motor support (301), a first driving pulley (303) is fixedly arranged at the output end of the stirring motor (302), the bobbin assembly (305) comprises a bobbin body (3051), the bobbin body (3051) penetrates through the mounting plate (206), the bobbin support (3052) is fixedly arranged above the bobbin body (3051), the bottom end of the bobbin support (3052) is fixedly connected with the upper surface of the mounting plate (206), an air inlet (3053) is formed in the bobbin body (3051), the air inlet (3053) is arranged below the mounting plate (206) and is internally communicated with the bobbin body (3051), an air inlet pipe (306) is arranged on the air inlet (3053), the free end of the air inlet pipe (306) is bent upwards and is arranged above one side of the mounting plate (206), a feeding pipe (3054) is arranged on one side of the bottom end of the bobbin body (3054), one end of the bobbin body (3054) is fixedly connected with the inner side wall (201) of the stirring box (307) through the stirring box, one end of the feeding hopper (3054) is fixedly connected with the inner side wall (201) of the stirring box (3054), the stirring device is characterized in that a first driven belt pulley (304) is fixedly arranged at the top end of the stirring shaft (307), the first driven belt pulley (304) is connected with the first driving belt pulley (303) through belt transmission, a stirring paddle (308) is fixedly arranged at the bottom end of the stirring shaft (307), a bulk material disc (309) is fixedly arranged at the bottom end of the bobbin body (3051), the bulk material disc (309) is matched with the stirring paddle (308), a plurality of blades (3091) are fixedly arranged on one side of the bulk material disc (309), the blades (3091) are distributed in a circular array by taking the center of the bulk material disc (309) as the center of a circle, through holes (3092) are formed in the center of the bulk material disc (309), and the through holes (3092) are matched with the bottom end of the bobbin body (3051).
The foam scraping mechanism (4) comprises a foam scraping motor (401), a speed reducer (402), a rotating shaft (405) and a foam scraping support (406), wherein the foam scraping motor (401) and the speed reducer (402) are both fixed on one side, close to a feed hopper (205), of the upper surface of a mounting plate (206), the output end of the foam scraping motor (401) is connected with the output end of the speed reducer (402) through a coupling in a transmission manner, a second driving pulley (403) is installed and fixed at the output end of the speed reducer (402), the two foam scraping supports (406) are oppositely fixed on the top end of the stirring box (201), the rotating shaft (405) is rotatably installed between the two foam scraping supports (406), a second driven pulley (404) is installed and fixed at one end of the rotating shaft (405), the second driven pulley (404) is connected with the second driving pulley (403) through a belt in a transmission manner, two oppositely arranged cross bars (407) are fixed on the rotating shaft (405), foam scraping plates (408) are both ends of the cross bars (407), and the edges of the foam scraping plates (408) are matched with the stirring box (201).
The treatment process for preparing the pure copper powder comprises the following steps:
step S1: removing components on the surface of the waste circuit board, and crushing the components into circuit board particles;
step S2: carrying out magnetic separation on the circuit board particles to remove ferromagnetic metal particles in the circuit board particles, preparing the circuit board particles and water into mixed slurry, carrying out flotation under the condition that the rotating speed is 1800-2200r/min and the aeration quantity is 100L/h, and removing floating nonmetallic particles to obtain a precipitated metal concentrate;
step S3: ball milling the metal enriched body into enriched body powder, mixing the enriched body powder and water according to 100g: the method comprises the steps of adding 1L of the dosage ratio into copper powder flotation equipment to obtain enriched slurry, sequentially adding sodium sulfide, sec-octyl alcohol and butyl xanthate into the copper powder flotation equipment, carrying out flotation on the enriched slurry, and cleaning, precipitating and drying copper particles collected in the copper powder flotation equipment to obtain pure copper powder.
2. The copper powder flotation device for preparing pure copper powder by using waste circuit boards according to claim 1, wherein the copper powder flotation device comprises: the granularity of the circuit board particles is 0.15-0.3mm.
3. The copper powder flotation device for preparing pure copper powder by using waste circuit boards according to claim 1, wherein the copper powder flotation device comprises: the dosage ratio of the circuit board particles to the water in the mixed slurry is 100-120g:1L.
4. The copper powder flotation device for preparing pure copper powder by using waste circuit boards according to claim 1, wherein the copper powder flotation device comprises: the particle size of the enriched powder is 0.05-0.1mm.
5. The copper powder flotation device for preparing pure copper powder by using waste circuit boards according to claim 1, wherein the copper powder flotation device comprises: the weight ratio of the sodium sulfide to the sec-octanol to the butyl xanthate to the enriched slurry is 0.015:0.02:0.02:100.
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CN106076657A (en) * 2016-06-16 2016-11-09 兰州理工大学 The flotation separation method of copper in a kind of waste mobile phone circuit board
CN108677021A (en) * 2018-06-26 2018-10-19 兰州理工大学 A method of recycling fine copper from useless circuit board
CN108940567A (en) * 2018-07-02 2018-12-07 兰州理工大学 Hydro-thermal vulcanization-warm water flotation separation method of copper in a kind of useless circuit board
CN110434158A (en) * 2019-08-26 2019-11-12 华南理工大学 A kind of technique that mechanical approach processing waste printed circuit board prepares copper alloy powder
CN110453076A (en) * 2019-08-26 2019-11-15 华南理工大学 A kind of method of waste printed circuit board metal concentrate recycling preparation regeneration copper alloy
CN110551897A (en) * 2019-08-26 2019-12-10 华南理工大学 process for preparing pure copper powder by treating waste circuit board through mechanical and physical method
CN113020219A (en) * 2021-03-15 2021-06-25 北京工业大学 Method for preparing low-iron-content metal powder by treating waste circuit board components through mechanical and physical method

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106076657A (en) * 2016-06-16 2016-11-09 兰州理工大学 The flotation separation method of copper in a kind of waste mobile phone circuit board
CN108677021A (en) * 2018-06-26 2018-10-19 兰州理工大学 A method of recycling fine copper from useless circuit board
CN108940567A (en) * 2018-07-02 2018-12-07 兰州理工大学 Hydro-thermal vulcanization-warm water flotation separation method of copper in a kind of useless circuit board
CN110434158A (en) * 2019-08-26 2019-11-12 华南理工大学 A kind of technique that mechanical approach processing waste printed circuit board prepares copper alloy powder
CN110453076A (en) * 2019-08-26 2019-11-15 华南理工大学 A kind of method of waste printed circuit board metal concentrate recycling preparation regeneration copper alloy
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CN113020219A (en) * 2021-03-15 2021-06-25 北京工业大学 Method for preparing low-iron-content metal powder by treating waste circuit board components through mechanical and physical method

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