Reaction kettle for preparing silver-coated copper powder
By employing multiple stirrers and a double-layer jacket design in the reactor, the problem of uneven stirring of copper powder solution was solved, achieving uniform and dense coating and complete reaction of silver-coated copper powder, thus improving the preparation quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-03
- Publication Date
- 2026-03-27
AI Technical Summary
The copper powder solution in the existing reactor is not stirred evenly, which leads to insufficient reaction between the silver ammonia solution and the copper powder solution, resulting in uneven particle size of the silver-coated copper powder and incomplete coating.
Four stirrers are used to drive radial and plug-flow impellers to fully stir the copper powder solution, and the temperature is controlled by the jacket of the double-layer reactor. Combined with the uniform spraying of silver salt solution by the drip pipe, the reaction is ensured to proceed uniformly.
This method achieves uniform and dense coating of silver-coated copper powder, ensuring complete reaction of the copper powder and uniform particle size, thus improving the preparation quality.
Smart Images
Figure CN224040947U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of reaction kettle, concretely to a reaction kettle for preparing silver-coated copper powder. BACKGROUND
[0002] The existing silver-coated copper powder for electronic paste is prepared by adopting liquid phase reduction method in a reaction kettle, and the copper powder solution is stirred in the reaction kettle, and the silver ammonia solution is added dropwise into the copper powder solution to prepare silver-coated copper powder.
[0003] However, the existing technology has the following shortcomings: the copper powder solution in the reaction kettle is difficult to stir uniformly, the copper powder concentration in the local area is high, and the copper powder is not uniformly dispersed by stirring, so that the silver ammonia solution cannot fully react with the copper powder solution, resulting in uneven particle size of the silver-coated copper powder and non-dense wrapping. UTILITY MODEL CONTENT
[0004] In view of the deficiencies of the prior art, the utility model provides a reaction kettle for preparing silver-coated copper powder, which solves the problems that the copper powder solution in the reaction kettle is difficult to stir uniformly, the copper powder concentration in the local area is high, and the copper powder is not uniformly dispersed by stirring, so that the silver ammonia solution cannot fully react with the copper powder solution, resulting in uneven particle size of the silver-coated copper powder and non-dense wrapping.
[0005] The utility model provides the following technical scheme: a reaction kettle for preparing silver-coated copper powder, including the reaction kettle body, the top of reaction kettle body is installed with motor, the inside top wall rotation of reaction kettle body is installed with four stirrers, the top end of the stirrer in the middle extends to the top of reaction kettle body and is fixedly connected with driving gear, the top end of three stirrers all extends to the top of reaction kettle body and all is fixedly connected with driven gear, three driven gears all are engaged between the driving gear, and the output of motor is fixedly connected with driving gear, the side surface of reaction kettle body is fixedly installed with liquid storage tank, the discharge end of liquid storage tank is provided with current-carrying valve, the output of current-carrying valve is connected with drip tube, and the drip tube all extends to the inside of reaction kettle body.
[0006] The reaction kettle body is a double-layer reaction kettle, and a sandwich layer is arranged in the inside.
[0007] Preferred technical scheme one: the stirrer includes a stirring rod, and the surface of the stirring rod is provided with radial flow type stirring paddle and plug flow type stirring paddle.
[0008] Preferred technical scheme two: the drip tube is connected with a row of spray heads at one end in the inside of the kettle body.
[0009] Preferably, the upper surface of the reaction kettle body is provided with a water inlet, the bottom end of the reaction kettle body is provided with a water outlet, and the water inlet and the water outlet are communicated with the interlayer.
[0010] Preferably, the bottom of the reaction kettle body is provided with a discharge port, and the top of the reaction kettle is provided with a feeding port.
[0011] Preferably, the lower surface of the reaction kettle body is fixedly connected with four supporting legs.
[0012] Compared with the prior art, the utility model provides a reaction kettle for preparing silver-coated copper powder, has the following beneficial effects: when using, the copper powder raw material is placed in the inside of the reaction kettle body through the feeding port, then the silver salt solution in the liquid storage tank controls the flow rate through the current -carrying valve, flows through the dropping tube and sprays out from the spray head, can fully and uniformly react with the copper powder in the reaction kettle, and the constant temperature circulating water is introduced into the interlayer of the double -layer reaction kettle through the water inlet and the water outlet, realizes the control to the reaction kettle reaction temperature. The copper powder in the silver-coated copper powder prepared by using the reaction kettle can fully and completely react, and the silver is uniformly and densely wrapped. BRIEF DESCRIPTION OF DRAWINGS
[0013] Fig. 1 It is the structural schematic diagram of the utility model;
[0014] Fig. 2 It is the structural plan view of the utility model.
[0015] In the drawing: 1, motor;2, liquid storage tank;3, current -carrying valve;4, dropping tube;5, first spray head;6, interlayer;7, radial flow type stirring paddle;8, plug -flow type stirring paddle;9, feeding port;10, water inlet;11, reaction kettle body;12, water outlet;13, discharge port;14, driving gear;15, driven gear. DETAILED DESCRIPTION
[0016] Please refer to Figs. 1-2 ,
[0017] Embodiment one: a reaction kettle for preparing silver-coated copper powder, comprising a reaction kettle body 11, a motor 1 is installed on the top of the reaction kettle body 11, four stirrers are rotatably installed on the inner top wall of the reaction kettle body 11, the top end of the stirrer located in the middle extends to the top of the reaction kettle body 11 and is fixedly connected with a driving gear 14, the top end of the other three stirrers all extends to the top of the reaction kettle body 11 and is fixedly connected with a driven gear 15, the three driven gears 15 are all in meshing connection with the driving gear 14, the output end of the motor 1 is fixedly connected with the driving gear 14, a liquid storage tank 2 is fixedly installed on the side of the reaction kettle body 11, a current-carrying valve 3 is arranged on the discharge end of the liquid storage tank 2, the output end of the current-carrying valve 3 is connected with a dropping tube 4, and the dropping tube 4 extends into the inside of the reaction kettle body 11.
[0018] The reaction kettle body 11 is a double-layer reaction kettle, and a sandwich layer 6 is arranged in the inside of the reaction kettle body 11.
[0019] Embodiment two: the difference between the embodiment and embodiment one lies in that the stirrer comprises a stirring rod, radial flow type stirring paddles 7 and plug flow type stirring paddles 8 are arranged on the surface of the stirring rod, and the radial flow type stirring paddles 7 and the plug flow type stirring paddles 8 are driven by the motor 1 to stir the copper powder solution, so that the reaction is more sufficient.
[0020] Embodiment three: the difference between the embodiment and embodiment one lies in that the dropping tube 4 is connected with a row of spray heads 5 at one end in the inside of the kettle body 14, so that the spraying range of the solution is wider.
[0021] Embodiment four: the difference between the embodiment and embodiment one lies in that a water inlet 10 is arranged on the upper surface of the reaction kettle body 11, a water outlet 12 is arranged at the bottom end of the reaction kettle body 11, the water inlet 10 and the water outlet 12 are both connected with the sandwich layer 6, and it is convenient to add constant-temperature circulating water to control the temperature of the reaction kettle.
[0022] Embodiment five: the difference between the embodiment and embodiment one lies in that a discharge port 13 is arranged at the bottom of the reaction kettle body 11, and a feeding port 9 is arranged at the top of the reaction kettle 11, so as to facilitate the addition and discharge of materials.
[0023] Embodiment six: the difference between the embodiment and embodiment one lies in that four supporting legs are fixedly connected with the lower surface of the reaction kettle body 11, so that the reaction kettle body 11 is more stable.
[0024] In summary, the reaction kettle for preparing silver-coated copper powder, in use, the copper powder raw material is put into the inside of the reaction kettle body 11 through the feeding port 9, then the silver salt solution in the liquid storage tank is controlled by the flow rate of the carrier valve 3, flows through the dropping tube 4 and is sprayed out from the spray head 5, can fully and uniformly react with the copper powder in the reaction kettle, and the motor 1 drives the radial flow type stirring paddle 7 and the plug flow type stirring paddle 8 to fully and uniformly stir the copper powder solution, at the same time, the constant temperature circulating water is passed into the interlayer 6 of the double-layer reaction kettle through the water inlet 10 and the water outlet 12, to realize the control of the reaction temperature of the reaction kettle. The copper powder in the silver-coated copper powder prepared by using the reaction kettle can fully and completely react, and the silver is uniformly and densely coated.
Claims
1. A reactor for preparing silver-coated copper powder, comprising a reactor body (11), characterized in that: The top of the reactor body (11) is provided with an electric motor (1), the inner top wall of the reactor body (11) is rotatably provided with four stirrers, the top end of the middle stirrer extends to the top of the reactor body (11) and is fixedly connected with a driving gear (14), the top end of each of the other three stirrers extends to the top of the reactor body (11) and is fixedly connected with a driven gear (15), the three driven gears (15) are engaged with the driving gear (14), the output end of the electric motor (1) is fixedly connected with the driving gear (14), the side of the reactor body (11) is fixedly provided with a liquid storage tank (2), the discharge end of the liquid storage tank (2) is provided with a carrier valve (3), the output end of the carrier valve (3) is connected with a dropping tube (4), and the dropping tube (4) extends into the reactor body (11). The reactor body (11) is a double-layer reactor provided with a sandwich layer (6) inside.
2. The reactor for preparing silver-coated copper powder according to claim 1, characterized in that: The stirrer comprises a stirring rod, and the surface of the stirring rod is provided with radial flow stirring paddles (7) and plug flow stirring paddles (8).
3. The reactor for preparing silver-coated copper powder according to claim 2, characterized in that: The dropping tube (4) is connected with a row of nozzles (5) at one end in the reactor body (11).
4. The reactor for preparing silver-coated copper powder according to claim 3, characterized in that: The upper surface of the reactor body (11) is provided with a water inlet (10), the bottom end of the reactor body (11) is provided with a water outlet (12), and the water inlet (10) and the water outlet (12) are connected with the sandwich layer (6).
5. The reactor for preparing silver-coated copper powder according to claim 4, characterized in that: The bottom of the reactor body (11) is provided with a discharge port (13), and the top of the reactor body (11) is provided with a feeding port (9).
6. The reactor for preparing silver-coated copper powder according to claim 5, characterized in that: The lower surface of the reactor body (11) is fixedly connected with four supporting legs. The lower surface of the reactor body (11) is fixedly connected with four supporting legs.