CN117701900B - Equipment and method for extracting and separating noble metal palladium from waste catalyst - Google Patents
Equipment and method for extracting and separating noble metal palladium from waste catalyst Download PDFInfo
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- CN117701900B CN117701900B CN202410160883.6A CN202410160883A CN117701900B CN 117701900 B CN117701900 B CN 117701900B CN 202410160883 A CN202410160883 A CN 202410160883A CN 117701900 B CN117701900 B CN 117701900B
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- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 229910052763 palladium Inorganic materials 0.000 title claims abstract description 49
- 239000003054 catalyst Substances 0.000 title claims abstract description 37
- 239000002699 waste material Substances 0.000 title claims abstract description 24
- 229910000510 noble metal Inorganic materials 0.000 title claims abstract description 18
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012216 screening Methods 0.000 claims abstract description 33
- 238000002386 leaching Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 26
- 238000007599 discharging Methods 0.000 claims abstract description 9
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 239000002245 particle Substances 0.000 claims description 22
- 239000000243 solution Substances 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 9
- 239000002244 precipitate Substances 0.000 claims description 6
- 239000003929 acidic solution Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 3
- 239000010970 precious metal Substances 0.000 claims 2
- 230000008569 process Effects 0.000 abstract description 10
- 238000000605 extraction Methods 0.000 abstract description 6
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 238000012546 transfer Methods 0.000 abstract description 3
- 238000004064 recycling Methods 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- QZPSXPBJTPJTSZ-UHFFFAOYSA-N aqua regia Chemical compound Cl.O[N+]([O-])=O QZPSXPBJTPJTSZ-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- SWXVUIWOUIDPGS-UHFFFAOYSA-N diacetone alcohol Chemical compound CC(=O)CC(C)(C)O SWXVUIWOUIDPGS-UHFFFAOYSA-N 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910017604 nitric acid Inorganic materials 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007873 sieving Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
- C22B11/04—Obtaining noble metals by wet processes
- C22B11/042—Recovery of noble metals from waste materials
- C22B11/048—Recovery of noble metals from waste materials from spent catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C23/00—Auxiliary methods or auxiliary devices or accessories specially adapted for crushing or disintegrating not provided for in preceding groups or not specially adapted to apparatus covered by a single preceding group
- B02C23/08—Separating or sorting of material, associated with crushing or disintegrating
- B02C23/14—Separating or sorting of material, associated with crushing or disintegrating with more than one separator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/005—Preliminary treatment of scrap
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Food Science & Technology (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention belongs to the field of recycling of waste catalysts, and particularly relates to equipment for extracting and separating noble metal palladium from waste catalysts, which comprises a crushing device, a screening device and a leaching device; the screening device comprises an outer cylinder, an inner cylinder and a motor; the inner cylinder is rotatably arranged in the outer cylinder, one end of the inner cylinder is fixedly connected with the output end of the motor, the inner cylinder is a screening cylinder, an annular cavity is formed between the inner cylinder and the outer cylinder and is communicated with the output end of the crushing device, the discharging end of the inner cylinder is communicated with the leaching device, and the leaching device is used for dissolving palladium into a leaching agent; compared with the prior art, the invention forms the crushing device, the screening device and the leaching device into an integral structure, omits the process of material transfer, simplifies the process flow and improves the production efficiency; the invention has the advantages of simple structure, convenient operation, environmental protection, high efficiency and the like, and can be widely applied to the field of noble metal extraction; the invention designs a process of twice crushing and screening, and can improve the utilization rate of the waste catalyst.
Description
Technical Field
The invention belongs to the field of waste catalyst recycling, and particularly relates to equipment and a method for extracting and separating noble metal palladium from waste catalysts.
Background
The extraction and separation of noble metal palladium from waste catalyst is an important environmental protection and resource recovery work. Palladium is a rare and expensive metal and is widely used in the fields of automotive catalysts, petrochemical industry, pharmacy and the like. However, when the catalyst reaches its useful life, palladium is discarded and if it can be effectively recovered, it will make a significant contribution to sustainable development and environmental protection.
The palladium in the spent catalyst is mainly present in the active components of the catalyst, which are usually immobilized on a substance called "support". In the palladium extraction process, the waste catalyst needs to be pretreated firstly to separate out active components. This step typically involves the processes of crushing, milling, and chemical dissolution. In the prior art, three different devices are needed for the processes of crushing, screening and leaching and dissolving, and the transfer of materials is needed among the devices, which is usually realized by a conveyor belt in automatic production, thus increasing the cost and reducing the production efficiency.
Disclosure of Invention
The invention aims to provide equipment and a method for extracting and separating noble metal palladium from waste catalysts, so as to solve the problems in the prior art, and in order to achieve the purposes of the invention, the invention adopts the following technical scheme:
The equipment for extracting and separating the noble metal palladium from the waste catalyst comprises a crushing device, a screening device and a leaching device;
The screening device comprises an outer cylinder, an inner cylinder and a motor; the inner cylinder is rotatably arranged in the outer cylinder, one end of the inner cylinder is fixedly connected with the output end of the motor, the inner cylinder is a screening cylinder, an annular cavity is formed between the inner cylinder and the outer cylinder and is communicated with the output end of the crushing device, the discharging end of the inner cylinder is communicated with the leaching device, and the leaching device is used for dissolving palladium into a leaching agent;
The outer cylinder and the inner cylinder are obliquely arranged, and the leaching device is positioned at one end of the inner cylinder with lower height;
The inner cylinder is sleeved with a plurality of baffle rings, the inner ring of each baffle ring is fixedly connected with the outer wall surface of the inner cylinder, the outer ring of each baffle ring is rotatably connected with the inner wall surface of the outer cylinder, the inner ring of each baffle ring is provided with a notch, and a through hole for passing materials is formed between each notch and the outer wall surface of the inner cylinder;
an arc-shaped stop block is fixedly connected to the inner wall surface of the outer cylinder, and the arc-shaped stop blocks are arranged between two adjacent baffle rings.
Further, a plurality of connecting parts are arranged between the outer ring of the baffle ring and the inner wall surface of the outer cylinder, and the connecting parts are distributed around the circumference of the baffle ring;
The connecting part comprises an annular groove arranged on the outer ring of the baffle ring, a plurality of positioning bolts are connected to the outer cylinder in a threaded mode, the positioning bolts penetrate through the outer cylinder and are abutted to the balls, grooves matched with the balls are formed in the end portions of the positioning bolts, and the balls are rotatably located in the annular groove.
Further, the lower end of the outer cylinder is detachably connected with a lower baffle, the inner cylinder rotatably penetrates through the lower baffle, a first blanking pipe is arranged between the lower baffle and the lowermost baffle ring, and the first blanking pipe is fixedly connected with the outer cylinder and communicated with the annular cavity.
Further, a second screening mechanism is arranged at the discharging end of the inner cylinder;
the second screening mechanism comprises a fixed pipe, a screen and a connecting pipe, wherein the fixed pipe is fixedly connected with the blanking end of the inner cylinder, one end of the fixed pipe, which is far away from the inner cylinder, is fixedly connected with the screen, the fixed pipe is rotatably arranged in the connecting pipe, and the connecting pipe is communicated with the leaching device.
Further, the lower surface fixed connection second unloading pipe of connecting pipe, be provided with first hole on the wall of fixed pipe, be provided with the second hole on the wall of connecting pipe, the second hole intercommunication the second unloading pipe, the second hole is located on the outside periphery of first hole, when first, second hole coincidence distributes, by the material that the screen cloth blocked enters into from first, second hole the second unloading pipe.
Further, reducing mechanism includes the shell, rotationally set up two crushing roller in the shell, two crushing roller connects drive arrangement respectively to the two relative rotation, the shell top sets up the feeder hopper, the shell bottom is provided with the feed opening, the feed opening communicates the temporary storage pipe, temporary storage pipe fixed connection the urceolus, and communicate the annular chamber.
The method for extracting and separating noble metal palladium from the waste catalyst comprises the following steps:
Step one, crushing a catalyst by using a crushing device;
step two, the crushed catalyst particles enter a screening device to screen out particles meeting the particle size requirement; returning the particles which do not meet the particle size requirement to a crushing device again for crushing;
Step three, the catalyst particles enter a leaching device, and an acidic solution is added to dissolve palladium into the solution;
Step four, adding an organic extractant into the palladium-containing solution, and transferring palladium into the organic solution;
step five, adding a precipitant into the palladium-containing organic solution to realize palladium precipitation;
And step six, separating the palladium-containing precipitate, and drying and roasting the palladium-containing precipitate to obtain the metallic palladium.
The invention has the following beneficial effects: compared with the prior art, the invention forms the crushing device, the screening device and the leaching device into an integral structure, omits the process of material transfer, simplifies the process flow and improves the production efficiency; the invention has the advantages of simple structure, convenient operation, environmental protection, high efficiency and the like, and can be widely applied to the field of noble metal extraction; the invention designs a process of twice crushing and screening, and can improve the utilization rate of the waste catalyst.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of FIG. 1 at A;
FIG. 3 is a schematic diagram of a baffle ring connection relationship;
FIG. 4 is an enlarged schematic view of FIG. 1 at B;
FIG. 5 is a schematic diagram of the mating relationship of a connecting tube and a fixed tube.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 5 in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. The technical means used in the examples are conventional means well known to those skilled in the art unless otherwise indicated.
In the description of the present invention, it should be understood that the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.
As shown in fig. 1, the equipment for extracting and separating noble metal palladium from the waste catalyst comprises a crushing device, a screening device and a leaching device;
The screening device comprises an outer cylinder 4, an inner cylinder 5 and a motor 6; the inner cylinder 5 is rotatably arranged in the outer cylinder 4, one end of the inner cylinder 5 is fixedly connected with the output end of the motor 6, the inner cylinder 5 is a screening cylinder, an annular cavity is formed between the inner cylinder 5 and the outer cylinder 4 and is communicated with the output end of the crushing device, the discharging end of the inner cylinder 5 is communicated with the leaching device, and the leaching device is used for dissolving palladium into a leaching agent.
The outer cylinder 4 and the inner cylinder 5 are obliquely arranged, and the leaching device is positioned at one end of the inner cylinder 5 with lower height.
Specifically, the bottom of the outer cylinder 4, the bottom of the crushing device and the motor 6 are respectively supported on the ground through brackets. The outer cylinder 4 and the inner cylinder 5 are coaxially arranged. The crushed palladium-containing particles enter the annular cavity, and along with the rotation of the inner cylinder 5, the palladium-containing particles meeting the particle size requirement enter the inner cylinder 5 and are output to a leaching device for leaching extraction. Compared with the prior art, the invention forms the crushing device, the screening device and the leaching device into an integral structure, omits the process of transferring materials, simplifies the process flow and improves the production efficiency. The invention has the advantages of simple structure, convenient operation, environmental protection, high efficiency and the like, and can be widely applied to the field of noble metal extraction. The waste catalyst is the prior art, such as a waste automotive catalyst.
As shown in fig. 1 and fig. 3, the inner cylinder 5 and the outer cylinder 4 are all obliquely arranged, a plurality of baffle rings 7 are sleeved on the inner cylinder 5, an inner ring of each baffle ring 7 is fixedly connected with the outer wall surface of the inner cylinder 5, an outer ring of each baffle ring 7 is rotatably connected with the inner wall surface of the outer cylinder 4, a notch part 701 is arranged on the inner ring of each baffle ring 7, and a through hole for passing materials is formed between the notch part 701 and the outer wall surface of the inner cylinder 5.
The material in the annular chamber and the inner barrel 5 moves downwards under the action of dead weight. The size of the baffle ring 7 is adapted to the annular cavity. The through holes may be in an arc-shaped waist-shaped hole structure as shown in fig. 3, and the plurality of notch portions 701 are uniformly distributed around the circumferential direction of the inner cylinder 5.
As shown in fig. 1-3, a plurality of connecting parts 8 are arranged between the outer ring of the baffle ring 7 and the inner wall surface of the outer cylinder 4, and the plurality of connecting parts 8 are distributed around the circumference of the baffle ring 7;
The connecting part 8 comprises an annular groove arranged on the outer ring of the baffle ring 7, a plurality of positioning bolts 801 are connected to the outer cylinder 4 in a threaded mode, the positioning bolts 801 penetrate through the outer cylinder 4 and are abutted against the balls 802, grooves matched with the balls 802 are formed in the end portions of the positioning bolts 801, and the balls 802 are rotatably located in the annular groove.
The balls 802 roll with the rotation of the retainer ring 7. The grooves at the end of the positioning bolts 801 limit the balls 802, so that the rotating smoothness of the baffle ring 7 is improved. And the positioning bolt 801 is removed, so that the ball 802 can be taken out, and the assembly between the inner cylinder and the outer cylinder is convenient.
The baffle ring 7 has two functions, namely, the baffle ring can block materials, reduce the passing speed of the materials, enable palladium-containing particles to be screened more uniformly, and realize positioning and fixing between the inner cylinder and the outer cylinder through matching with the balls 802.
Further, the lower end of the outer cylinder 4 is detachably connected with a lower baffle, the inner cylinder 5 rotatably penetrates through the lower baffle, a first blanking pipe is arranged between the lower baffle and the lowermost baffle ring 7, and the first blanking pipe is fixedly connected with the outer cylinder 4 and is communicated with the annular cavity.
Further, a second screening mechanism 9 is arranged at the discharging end of the inner cylinder 5;
The second screening mechanism 9 comprises a fixed pipe 901, a screen 902 and a connecting pipe 906, wherein the fixed pipe 901 is fixedly connected with the blanking end of the inner cylinder 5, one end of the fixed pipe 901, which is far away from the inner cylinder 5, is fixedly connected with the screen 902, the fixed pipe 901 is rotatably arranged in the connecting pipe 906, and the connecting pipe 906 is communicated with the leaching device.
The second screening mechanism 9 is used for carrying out secondary screening on the materials screened by the inner cylinder 5, so that the coarse screening of the inner cylinder 5 can be designed, and the fine screening structure of the second screening mechanism 9 is realized. The connection pipe 906 is fixedly provided by a column. With the rotation of the inner cylinder 5, the stationary tube 901 rotates together, causing the screen 902 to rotate, so that the material piled inside the screen 902 can be effectively screened.
Further, the lower surface of the connecting pipe 906 is fixedly connected with a second blanking pipe 905, a first drain hole 903 is formed in the wall surface of the fixed pipe 901, a second drain hole 904 is formed in the wall surface of the connecting pipe 906, the second drain hole 904 is communicated with the second blanking pipe 905, the second drain hole 904 is located on the outer circumferential surface of the first drain hole 903, and when the first drain hole and the second drain hole are distributed in a superposition mode, materials blocked by the screen 902 enter the second blanking pipe 905 from the first drain hole and the second drain hole.
When the fixed pipe 901 is rotated to the first and second holes to be overlapped, as shown in fig. 5, the material enters the second discharging pipe 905 through the first and second holes.
In order to achieve more thorough comminution and sieving, it is necessary to re-feed the portion of material to the comminution apparatus for comminution, including material that cannot pass through the screen 902 and a portion of material that can pass through the screen 902.
Further, the smashing device comprises a shell 2, two smashing roll shafts 3 are rotatably arranged in the shell 2, the two smashing roll shafts 3 are respectively connected with a driving device and rotate relatively to each other, a feeding hopper 201 is arranged at the top of the shell 2, a discharging opening 202 is formed in the bottom of the shell 2, the discharging opening 202 is communicated with a temporary storage pipe 401, and the temporary storage pipe 401 is fixedly connected with the outer cylinder 4 and is communicated with the annular cavity.
The driving device can be a motor, a belt and the like. The crushing roller shaft 3 is of the prior art, and a plurality of teeth 301 are arranged on the surface of the crushing roller shaft for crushing materials. The leaching device is of prior art, for example a reaction tank 1, which is provided with a feed inlet 101, the feed inlet 101 being in communication with a connecting pipe 906.
In addition, referring to fig. 1, an arc-shaped stop block 402 is fixedly connected to the inner wall surface of the outer cylinder 4, and an arc-shaped stop block 402 is arranged between two adjacent baffle rings 7, wherein the arc-shaped stop block 402 is preferably of a semicircular structure or a major arc structure. The outer ring of the inner cylinder 5 is wrapped by the arc-shaped stop block 402, the arc-shaped stop block 402 does not rotate along with the inner cylinder 5, an arc-shaped notch structure is formed above the inner cylinder 5, and materials move downwards from the arc-shaped notch and pass through the baffle rings 7. The arc-shaped stop block 402 has the advantages that materials can pass through the upper portion of the inner cylinder 5 at a constant speed, and the screening effect of the materials is improved. The screened particulate material is prevented from leaking out from below the inner barrel 5, so that the material in the inner barrel 5 can be output from the inside of the inner barrel. And a space is formed between the lower baffle plate and the lowermost baffle ring 7, the space is internally communicated with the first blanking pipe, the arc-shaped stop block 402 is not arranged, and the material in the annular cavity is output from the space.
The method for extracting and separating noble metal palladium from the waste catalyst comprises the following steps:
Step one, crushing a catalyst by using a crushing device;
step two, the crushed catalyst particles enter a screening device to screen out particles meeting the particle size requirement; returning the particles which do not meet the particle size requirement to a crushing device again for crushing;
Step three, the catalyst particles enter a leaching device, and an acidic solution such as nitric acid, hydrochloric acid, aqua regia and the like is added to dissolve palladium into the solution;
Step four, adding an organic extractant into the palladium-containing solution, and transferring palladium into the organic solution; this step may be carried out in other reaction vessels and the organic extractant may be a diacetone solvent.
Step five, adding a sodium hydroxide precipitant into the palladium-containing organic solution to realize palladium precipitation;
And step six, separating the palladium-containing precipitate, and drying and roasting the palladium-containing precipitate to obtain the metallic palladium.
The above embodiments are only illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications, variations, alterations, substitutions made by those skilled in the art to the technical solution of the present invention should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the design of the present invention.
Claims (6)
1. The equipment for extracting and separating the noble metal palladium from the waste catalyst is characterized by comprising a crushing device, a screening device and a leaching device;
The screening device comprises an outer cylinder (4), an inner cylinder (5) and a motor (6); the inner cylinder (5) is rotatably arranged in the outer cylinder (4), one end of the inner cylinder (5) is fixedly connected with the output end of the motor (6), the inner cylinder (5) is a screening cylinder, an annular cavity is formed between the inner cylinder (5) and the outer cylinder (4), the annular cavity is communicated with the output end of the crushing device, the discharging end of the inner cylinder (5) is communicated with the leaching device, and the leaching device is used for dissolving palladium into a leaching agent;
The novel material feeding device is characterized in that the inner cylinder (5) and the outer cylinder (4) are obliquely arranged, a plurality of baffle rings (7) are sleeved on the inner cylinder (5), the inner ring of each baffle ring (7) is fixedly connected with the outer wall surface of the inner cylinder (5), the outer ring of each baffle ring (7) is rotatably connected with the inner wall surface of the outer cylinder (4), a notch part (701) is arranged on the inner ring of each baffle ring (7), and a through hole for passing materials is formed between the notch part (701) and the outer wall surface of the inner cylinder (5);
The lower end of the outer cylinder (4) is detachably connected with a lower baffle, the inner cylinder (5) rotatably penetrates through the lower baffle, a first blanking pipe is arranged between the lower baffle and the lowermost baffle ring (7), and the first blanking pipe is fixedly connected with the outer cylinder (4) and is communicated with the annular cavity.
2. The equipment for extracting and separating noble metal palladium from waste catalysts according to claim 1, wherein a plurality of connecting parts (8) are arranged between the outer ring of the baffle ring (7) and the inner wall surface of the outer cylinder (4), and the connecting parts (8) are distributed around the circumference of the baffle ring (7);
The connecting part (8) comprises an annular groove arranged on the outer ring of the baffle ring (7), a plurality of positioning bolts (801) are connected to the outer cylinder (4) in a threaded mode, the positioning bolts (801) penetrate through the outer cylinder (4) and are abutted to the balls (802), grooves matched with the balls (802) are formed in the end portions of the positioning bolts (801), and the balls (802) are rotatably located in the annular groove.
3. The equipment for extracting and separating noble metal palladium from waste catalyst according to claim 1, wherein the blanking end of the inner cylinder (5) is provided with a second screening mechanism (9);
The second screening mechanism (9) comprises a fixed pipe (901), a screen (902) and a connecting pipe (906), wherein the fixed pipe (901) is connected with the blanking end of the inner cylinder (5), the fixed pipe (901) is far away from one end of the inner cylinder (5) and is fixedly connected with the screen (902), the fixed pipe (901) is rotatably arranged in the connecting pipe (906), and the connecting pipe (906) is communicated with the leaching device.
4. The device for extracting and separating precious metal palladium from waste catalysts according to claim 3, wherein the lower surface of the connecting pipe (906) is fixedly connected with a second blanking pipe (905), a first drain hole (903) is formed in the wall surface of the fixed pipe (901), a second drain hole (904) is formed in the wall surface of the connecting pipe (906), the second drain hole (904) is communicated with the second blanking pipe (905), the second drain hole (904) is located on the rotating path of the first drain hole (903), and when the first drain hole and the second drain hole are distributed in a superposition mode, materials blocked by the screen (902) enter the second blanking pipe (905) from the first drain hole and the second drain hole.
5. The equipment for extracting and separating precious metal palladium from waste catalysts according to claim 1, wherein the crushing device comprises a shell (2), two crushing roller shafts (3) are rotatably arranged in the shell (2), the two crushing roller shafts (3) are respectively connected with a driving device and rotate relatively, a feed hopper (201) is arranged at the top of the shell (2), a feed opening (202) is arranged at the bottom of the shell (2), the feed opening (202) is communicated with a temporary storage tube (401), and the temporary storage tube (401) is fixedly connected with the outer cylinder (4) and is communicated with the annular cavity.
6. The method for extracting and separating the noble metal palladium from the waste catalyst is applied to the equipment for extracting and separating the noble metal palladium from the waste catalyst as claimed in claim 1, and is characterized by comprising the following steps:
Step one, crushing a catalyst by using a crushing device;
step two, the crushed catalyst particles enter a screening device to screen out particles meeting the particle size requirement; returning the particles which do not meet the particle size requirement to a crushing device again for crushing;
Step three, the catalyst particles enter a leaching device, and an acidic solution is added to dissolve palladium into the solution;
Step four, adding an organic extractant into the palladium-containing solution, and transferring palladium into the organic solution;
step five, adding a precipitant into the palladium-containing organic solution to realize palladium precipitation;
And step six, separating the palladium-containing precipitate, and drying and roasting the palladium-containing precipitate to obtain the metallic palladium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410160883.6A CN117701900B (en) | 2024-02-05 | 2024-02-05 | Equipment and method for extracting and separating noble metal palladium from waste catalyst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| US5727740A (en) * | 1996-07-03 | 1998-03-17 | Robinson; Forrest L. | Method and apparatus for recovering fractional components of soil |
| JP2009035800A (en) * | 2007-08-03 | 2009-02-19 | Dowa Metals & Mining Co Ltd | Method for recovering precious metal and method for producing copper |
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| CN112899478A (en) * | 2021-01-13 | 2021-06-04 | 深圳市正力实业有限公司 | Device and method for efficiently purifying precious metals in waste automobile exhaust catalyst |
| CN113046561A (en) * | 2021-03-09 | 2021-06-29 | 广东明方科技有限公司 | Grading extraction device and method for gold, silver and palladium precious metals in waste circuit boards |
| CN116219173A (en) * | 2023-02-22 | 2023-06-06 | 绍兴金冶环保科技有限公司 | Recovery method of silver-containing catalyst waste |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB572578A (en) * | 1943-05-17 | 1945-10-15 | Abraham Carel Hendrik Faurie | Improved process for the extraction of gold and other metals from gold bearing ores |
| GB960900A (en) * | 1961-10-30 | 1964-06-17 | Oxy Catalyst Inc | Improvements in or relating to a catalytic exhaust purifier for internal combustion engines and a method of purifying exhaust gases |
| US5727740A (en) * | 1996-07-03 | 1998-03-17 | Robinson; Forrest L. | Method and apparatus for recovering fractional components of soil |
| JP2009035800A (en) * | 2007-08-03 | 2009-02-19 | Dowa Metals & Mining Co Ltd | Method for recovering precious metal and method for producing copper |
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| CN112899478A (en) * | 2021-01-13 | 2021-06-04 | 深圳市正力实业有限公司 | Device and method for efficiently purifying precious metals in waste automobile exhaust catalyst |
| CN113046561A (en) * | 2021-03-09 | 2021-06-29 | 广东明方科技有限公司 | Grading extraction device and method for gold, silver and palladium precious metals in waste circuit boards |
| CN116219173A (en) * | 2023-02-22 | 2023-06-06 | 绍兴金冶环保科技有限公司 | Recovery method of silver-containing catalyst waste |
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| CN117701900A (en) | 2024-03-15 |
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