An oxygen-increasing kneading device for nitrogen atomized aluminum powder
By introducing a spraying component, a heating component, and a nitrogen distributor into the nitrogen atomized aluminum powder oxygenation kneading device, the problems of uneven oxidant addition, uneven heating temperature, and incomplete discharge were solved, achieving a more efficient oxygenation kneading and discharge process.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QUJING HUAYIXING NEW MATERIAL CO LTD
- Filing Date
- 2025-08-26
- Publication Date
- 2026-07-21
AI Technical Summary
Existing nitrogen-atomized aluminum powder oxygenation kneading devices suffer from problems such as uneven oxidant addition, uneven heating temperature, and incomplete material discharge, which affect production quality and efficiency.
The design incorporates a spray assembly, a heating assembly, and a nitrogen distributor to achieve uniform addition of the oxidant and uniform control of the heating temperature. A sealing mechanism and a screw conveyor ensure thorough discharge.
This improves the uniformity of oxygen content and heating temperature in nitrogen-atomized aluminum powder, ensuring thorough discharge and significantly improving production quality and efficiency.
Smart Images
Figure CN224525998U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of metal powder preparation and production technology, specifically relating to an oxygen-enriching kneading device for nitrogen-atomized aluminum powder. Background Technology
[0002] Nitrogen-atomized aluminum powder is a metal powder produced from aluminum ingots using a nitrogen atomization method. The production process mainly includes aluminum ingot melting, atomization powdering, aluminum powder grading, and packaging. Prepared under inert gas protection via nitrogen atomization, it ultimately yields spherical aluminum powder particles. Nitrogen-atomized aluminum powder is characterized by low oxygen content and good flowability. With the increasing demand for aluminum powder, nitrogen-atomized aluminum powder with a high oxygen content of 1.0%-1.5% is used in nuclear waste filling containers. However, the oxygen content of the atomized aluminum powder produced using the above process is generally below 1%, which clearly does not meet the requirements, necessitating oxygenation treatment of the atomized aluminum powder. An aluminum powder oxygen-enriched kneader is a special kneading equipment used for controlled oxidation or passivation treatment of aluminum. In existing technology, the commonly used structure of a kneader typically includes a frame, a kneading body mounted on the frame, and a kneading agitator installed inside the kneading body. A top cover is located on the kneading body, and a hydraulic drive mechanism is installed on the kneading body to open and close the top cover. A material discharge drive device is mounted on the frame to drive the rotation of the kneading body. The above-described oxygen-enriched kneader has the following shortcomings during use: Firstly, existing oxygen-enriched kneading devices require the hydraulic drive mechanism to open the top cover when adding the oxidant. Adding oxidant using a hydraulically driven mechanism to open the top cover is cumbersome. The oxidant is poured into the kneader, leading to uneven addition. Furthermore, the existing kneader's structure is rudimentary, failing to achieve uniform heating, resulting in uneven reaction temperatures during the oxygen-assisted kneading of atomized aluminum powder, severely impacting product quality. Secondly, after oxygen-assisted kneading, the top cover needs to be opened, and the kneader rotated using a feeding mechanism to dump the atomized aluminum powder. This method results in incomplete discharge, requiring manual assistance and reducing production efficiency. Therefore, developing a nitrogen-atomized aluminum powder oxygen-assisted kneading device with a reasonable structure, good kneading production effect, and thorough and efficient discharge is objectively necessary. Summary of the Invention
[0003] The purpose of this invention is to provide an oxygen-enriched kneading device for nitrogen-atomized aluminum powder that has a reasonable structure, good kneading production effect, and thorough and efficient discharge.
[0004] The purpose of this utility model is achieved as follows: It includes a frame, a kneader body, a kneading agitator, a top cover, and a hydraulic drive mechanism for opening and closing the top cover. A feeding mechanism is provided on the top cover. A heating assembly is provided on the outer side of the kneader body. The kneading agitator is installed in the lower part of the kneader body. Spraying assemblies are symmetrically arranged on both sides of the kneader body above the kneading agitator. Each spraying assembly is connected to an oxidant storage tank via an inlet pipe. An inlet valve and a pressure pump are provided on the inlet pipe. The kneader body is located above the two spraying assembly assemblies. A nitrogen distributor is fixedly installed, and the nitrogen distributor is connected to a nitrogen storage tank through an air inlet pipe. An air inlet valve is installed on the air inlet pipe. An exhaust pipe is set on the upper part of the kneader body, and an exhaust valve and an air pump are installed on the exhaust pipe in sequence. A strip-shaped discharge port is machined on the bottom of the kneader body. A receiving trough is installed on the bottom of the kneader body outside the strip-shaped discharge port. A sealing mechanism that slides and cooperates with the strip-shaped discharge port is set in the receiving trough. Discharge chute is set on both sides of the receiving trough. A screw conveyor is installed at the end of the discharge chute, and a discharge port is set at the end of the screw conveyor.
[0005] Compared with existing technologies, the advantages of this device are: First, this device has modified and upgraded the structure of existing kneaders. The spraying component can evenly add oxidant to the kneader body to knead with aluminum powder without opening the top cover. The heating component can evenly heat the kneader body, ensuring uniform heating temperature during use. The nitrogen distributor can evenly introduce nitrogen into the kneader body during the aluminum powder kneading process. The spraying component, heating component, and nitrogen distributor in this device can increase the oxygen content of aluminum powder during the kneading process, which can significantly improve the effect of oxygenated kneading of aluminum powder; Second, This device features an optimized discharge mechanism. During the oxygen-kneading process of aluminum powder, the sealing mechanism can dynamically seal the strip-shaped discharge port to ensure the quality of the oxygen-kneading process. During discharge, the sealing mechanism releases the seal on the strip-shaped discharge port, allowing the oxygen-kneaded atomized aluminum powder to exit through the outlet and enter the receiving trough. From there, it passes through the discharge chute into the screw conveyor and is discharged. This discharge method solves the problem of incomplete discharge during the tumbling process, ensuring that the oxygen-kneaded atomized aluminum powder is completely discharged from the bottom of the kneader body. This significantly improves discharge efficiency and offers advantages such as a reasonable structure, good performance, and ease of adoption. Attached Figure Description
[0006] Figure 1 This is a front view schematic diagram of the present invention; Figure 2 This is a side view of the present invention; In the diagram: 1-Frame, 2-Kneader body, 3-Kneading agitator, 4-Top cover, 41-Feed pipe, 42-First cylinder, 43-Sealing plate, 44-Feeding hopper, 5-Hydraulic drive mechanism, 6-Liquid inlet pipe, 61-Liquid inlet valve, 62-Pressure pump, 7-Oxidant storage tank, 8-Nitrogen distributor, 9-Air inlet pipe, 91-Air inlet valve, 10-Nitrogen storage tank, 11-Exhaust pipe, 12-Exhaust valve, 1 3-Air pump, 14-Material receiving trough, 141-Second cylinder, 142-Sealing plate, 15-Discharge chute, 16-Screw conveyor, 17-Heating jacket, 18-Reinforcing connecting rod, 19-Electric heating rod, 20-Spray pipe, 21-Nozzle, 22-Rotating joint, 23-Drive motor, 24-Drive gear, 25-Driven gear, 26-Molecular sieve filter, 27-Bypass pipe, 28-Bypass valve. Detailed Implementation
[0007] The present invention will be further described below with reference to the accompanying drawings, but this description is not intended to limit the present invention in any way. Any changes or improvements made based on the teachings of the present invention shall fall within the protection scope of the present invention.
[0008] like Figures 1-2As shown, this utility model includes a frame 1, a kneader body 2, a kneading agitator 3, a top cover 4, and a hydraulic drive mechanism 5 for opening and closing the top cover 4. After the aluminum powder inside the kneader body 2 is discharged, the top cover can be opened using the hydraulic drive mechanism 5 to facilitate access to the kneader body 2 for cleaning and maintenance. The kneading agitator 3 is a Z-shaped agitator structure used in the prior art, mainly including two parallel Z-shaped agitator blades and a driver for driving the Z-shaped agitator blades to rotate. The driver includes a drive motor, a reducer, a transmission box, and two meshing gears, etc. The hydraulic drive mechanism 5 is a structure used in the prior art. A feeding mechanism is provided on the top cover 4, and a heating component is provided on the outside of the kneader body 2. The kneading agitator 3 is installed in the lower part of the kneader body 2. Spraying assemblies are symmetrically arranged on both sides of the kneader body 2 above the kneading agitator 3. Each spraying assembly is connected to an oxidant storage tank 7 via a liquid inlet pipe 6. The oxidant storage tank 7 stores liquid oxidant. An inlet valve 61 and a pressure pump 62 are installed on the liquid inlet pipe 6. A nitrogen distributor 8 is fixedly installed inside the kneader body 2 above the two spraying pipe assemblies. The nitrogen distributor 8 is connected to a nitrogen storage tank 10 via an air inlet pipe 9. The nitrogen storage tank 10 stores nitrogen. An air inlet valve 91 and a flow meter are installed on the air inlet pipe 9. The flow meter can monitor the nitrogen flow rate in real time and adjust the nitrogen flow rate as needed to ensure the rapid flow of nitrogen into the kneader body 2. The kneading machine body 2 is equipped with an exhaust pipe 11 on its upper part. An exhaust valve 12 and a vacuum pump 13 are sequentially installed on the exhaust pipe 11. The vacuum pump 13 actively extracts air from the kneading machine body 2, effectively reducing the internal air pressure and thus accelerating the nitrogen replacement process and improving the efficiency of oxygenated kneading. The exhaust valve 12 ensures that outside air does not flow back into the kneading machine body 2 during the extraction process, guaranteeing the purity of the internal gas environment. A pressure sensor (not shown in the figure) is installed on the kneading machine body 2. The pressure sensor can monitor the internal air pressure of the kneading machine body 2 in real time, ensuring the accuracy and efficiency of the nitrogen protection process. Continuous air pressure data allows operators to adjust the nitrogen input and emission rate in a timely manner, thereby maintaining an ideal air pressure environment and avoiding oxidation or other adverse reactions caused by improper air pressure. It also helps to save energy and reduce emissions, and optimize production costs. The air pressure sensor is a structure used in existing technology, and finished products can be purchased directly according to the needs of use. The bottom of the kneader body 2 is machined with a strip-shaped discharge port. A receiving groove 14 is installed on the bottom of the kneader body 2 outside the strip-shaped discharge port. A sealing mechanism that slides and cooperates with the strip-shaped discharge port is provided in the receiving groove 14. Discharge chute 15 is provided on both sides of the receiving groove 14. A screw conveyor 16 is installed at the end of the discharge chute 15, and a discharge port is provided at the end of the screw conveyor 16.
[0009] The working process of this device is as follows: The hydraulic drive mechanism 5 closes the top cover 4 on top of the kneader body 2, the sealing mechanism seals the strip-shaped discharge port, then the exhaust valve 12 and the vacuum pump 13 are opened, and the air is drawn out of the kneader body 2 by the vacuum pump 13 and the exhaust pipe 11, so that the air pressure in the kneader body 2 is in a vacuum state. Then the vacuuming is stopped, the vacuum pump 13 is closed, the exhaust valve 12 is closed, the air inlet valve 91 and the opening valve on the nitrogen storage tank 10 are opened, and the nitrogen in the nitrogen storage tank 10 will enter the nitrogen distributor 8 through the air inlet pipe 9. Inside, nitrogen is evenly distributed within the kneader body 2 via nitrogen distributor 8. During the process of introducing nitrogen into the kneader body 2, the inlet valve 91 can be adjusted to a lower flow level according to the flow meter to maintain nitrogen protection throughout the production process. Next, the kneading agitator 3 is turned on, and aluminum powder is added to the kneader body 2 using the feeding mechanism. Under the protection of nitrogen, the kneading agitator 3 agitates the aluminum powder. After a certain period of agitation, the liquid inlet valve 61 and the pressure pump 62 are opened, and the oxidant in the oxidant storage tank 7 is pumped by the pressure pump 62. Under the action of the spraying device, the oxidant will enter the spraying assembly through the inlet pipe 6. The spraying assembly will evenly spray the oxidant into the kneader body 2. After the oxidant is added, the inlet valve 61 and the pressure pump 62 will be closed. The sprayed oxidant and aluminum powder will be kneaded under the continuous stirring action of the kneading agitator 3. After the oxygen kneading treatment, the oxygen content of the aluminum powder will be increased. At this time, the sealing mechanism will be released from the strip outlet, and the atomized aluminum powder after oxygen kneading will be discharged from the strip outlet into the receiving trough 14, and then through the discharge chute. 15 enters the screw conveyor 16 and is discharged through the screw conveyor 16. The discharge method set by this device can solve the problem of incomplete discharge during the tumbling discharge process, and can ensure that the atomized aluminum powder after oxygen kneading is completely discharged from the bottom of the kneader body 2, which can significantly improve the discharge efficiency. After the aluminum powder after oxygen kneading is discharged from the kneader body 2, the air inlet valve 91 is closed and the nitrogen supply to the kneader body 2 is stopped. Aluminum powder is added to the kneader body 2 according to the above operation method, and the oxygen kneading operation of aluminum powder can be performed again.
[0010] Furthermore, to achieve sealing of the feeding mechanism and improve the effect of oxygen-kneading aluminum powder, the feeding mechanism includes a feeding pipe 41, a first cylinder 42, and a sealing plate 43. The first cylinder 42 is a structure used in the prior art, and finished products are directly purchased according to the stroke size used. A feeding port is machined on the top of the top cover 4. The feeding pipe 41 is vertically installed on the top of the top cover 4 outside the feeding port. A top plate is installed on the top of the feeding pipe 41. The fixed end of the first cylinder 42 is installed on the top plate. The sealing plate 43 is installed on the movable end of the first cylinder 42 and slides with the feeding port. A sealing ring is provided on the outer side of the sealing plate 43. One side of the feeding pipe 41... Equipped with a feeding hopper 44, when aluminum powder needs to be added to the kneader body 2, the first cylinder 42 is controlled to move the sealing plate 43 upward. The sealing plate 43 moves upward and disengages from the inlet. When the sealing plate 43 moves upward to above the outlet of the feeding hopper 44, aluminum powder is added into the kneader body 2 through the feeding hopper 44 and the feed pipe 41. After the aluminum powder is added, the first cylinder 42 is controlled to move the sealing plate 43 downward. The sealing plate 43 moves downward and blocks the inlet, so that the oxygen-adding kneading operation of aluminum powder can be carried out. The sealing ring set on the outside of the sealing plate 43 is to enhance the sealing performance between the sealing plate 43 and the inlet and prevent nitrogen from escaping from the gap between the inlet and the sealing plate 43.
[0011] Furthermore, to improve the efficiency of material discharge from the kneader body 2, the sealing mechanism includes a second cylinder 141 and a sealing plate 142. There are one or two second cylinders 141. The second cylinder 141 uses a structure already in the prior art; finished products can be directly purchased based on the required stroke size. The fixed end of the second cylinder 141 is mounted on the frame 1, and the movable end of the second cylinder 141 extends from below the receiving trough 14 into its interior. The sealing plate 142 is mounted on the top of the movable end of the second cylinder 141 and slides in cooperation with the strip-shaped discharge port. A sealing ring is provided on the outer side of the sealing plate 142. When the kneader body 2 is performing oxygenated kneading, the sealing plate 142 is located inside the strip-shaped discharge port, sealing it. When material discharge is required... The second cylinder 141 is controlled to move the sealing plate 142 downward, releasing the sealing plate 142 from the strip outlet. When the sealing plate 142 moves down to below the inlet of the discharge chute 15, the second cylinder 141 is stopped. The aluminum powder in the kneader body 2 falls from the strip outlet onto the sealing plate 141 under the action of the kneading agitator 3, and then enters the discharge chute 15 through the sealing plate 141. Finally, it is discharged through the screw conveyor 16. The sealing plate 141 can be set with a sloping structure that is high in the middle and low on both sides, so that the aluminum powder can enter the discharge chute 15 from both sides of the sealing plate 141. The sealing ring set on the outside of the sealing plate 141 is to enhance the sealing performance between the sealing plate 141 and the strip outlet, and prevent nitrogen from escaping from the gap between the strip outlet and the sealing plate 141.
[0012] Furthermore, to ensure uniform heating temperature of the kneader body 2 during the aluminum powder oxidation kneading process, the heating assembly includes heating jackets 17 spaced apart on the outside of the kneader body 2. Multiple reinforcing connecting rods 18 are provided between the heating jackets 17 and the kneader body 2 to improve the connection strength between the heating jackets 17 and the kneader body 2. A heating medium inlet is located at the upper part of one side of the heating jacket 17, and a heating medium outlet is located at the bottom of the other side. During the oxygen-assisted kneading of the aluminum powder, a heating medium, such as steam or heat transfer oil, is added into the heating jacket 17 through the heating medium inlet. After 8 hours, the kneader body 2 can be heated. The heating medium flows within the heating jacket 17, and the heated medium after heating is discharged from the heating medium outlet. During use, a temperature sensor can be installed on the heating jacket 17. The temperature sensor is a structure used in the prior art, and finished products are purchased directly according to the power used. The temperature sensor can monitor the heating temperature of the kneader body 2 in a timely manner. If the temperature of the kneader body 2 is lower than the set standard temperature, multiple sets of electric heating rods 19 are installed inside the heating jacket 17. The electric heating rods 19 can quickly heat the kneader body 2 and increase the heating temperature of the kneader body 2 in a short time.
[0013] Furthermore, to ensure that the oxidizing liquid is evenly sprayed inside the kneader body 2 and mixed with the aluminum powder, the spraying assembly includes a spray pipe 20 and nozzles 21. The spray pipe 20 is rotatably installed inside the kneader body 2. One end of the spray pipe 20 inside the kneader body 2 is sealed by a sealing plate, and the other end of the spray pipe 20 outside the kneader body 2 is connected to the liquid inlet pipe 6 by a rotating joint 22. A gear transmission mechanism for driving the spray pipe 20 to rotate is provided on the outside of the kneader body 2. The nozzles 21 are evenly spaced on the spray pipe 20 inside the kneader body 2. The gear transmission mechanism includes a drive motor 23, a driving gear 24, and a driven gear 25. The drive motor 23 is a structure used in the prior art, and a finished product can be directly purchased according to the power required. The drive motor 23 is installed on the outside of the kneader body 2 by a support plate. The drive gear 24 is mounted on the output shaft of the drive motor 23, and the driven gear 25 is mounted on the outer wall of the spray pipe 20 and meshes with the drive gear 24. In use, the oxidant enters the rotary joint 22 through the liquid inlet pipe 6, then enters the spray pipe 20, and is then sprayed out from the nozzle 21. Normally, the nozzle 11 is located above the kneader body 2, and the nozzle 21 sprays the oxidant downwards. However, during the spraying process of the nozzle 21, the drive motor 23 can be turned on. The drive motor 23 drives the drive gear 24 to rotate, and the drive gear 24 drives the driven gear 25 to rotate. The driven gear 25 will then drive the spray pipe 20 to rotate. By rotating the spray pipe 20 at a certain angle, the spraying direction of the nozzle 21 can be adjusted. This can adjust the spraying range of the nozzle 21, thereby improving the uniformity of the oxidant spraying. After the nozzle 21 is adjusted to the required angle, the drive motor can be turned off.
[0014] Furthermore, in order to ensure that nitrogen is evenly distributed inside the kneader body 2, the nitrogen distributor 8 is a hollow box with an A-frame structure on the top surface and multiple air outlets evenly distributed on the bottom. Nitrogen enters the box through the air inlet pipe 9 and is then sprayed out through the air outlets, which can ensure that the nitrogen entering the kneader body 2 is even.
Claims
1. An oxygen-enriched kneading device for nitrogen-atomized aluminum powder, comprising a frame (1), a kneader body (2), a kneading agitator (3), a top cover (4), and a hydraulic drive mechanism (5) for driving the top cover (4) to open and close, characterized in that: A feeding mechanism is provided on the top cover (4). A heating component is provided on the outside of the kneader body (2). The kneading agitator (3) is installed in the lower part of the kneader body (2). Spraying components are symmetrically arranged on both sides of the kneader body (2) above the kneading agitator (3). Each spraying component is connected to an oxidant storage tank (7) through a liquid inlet pipe (6). A liquid inlet valve (61) and a pressure pump (62) are provided on the liquid inlet pipe (6). A nitrogen distributor (8) is fixedly installed in the kneader body (2) above the two spray pipe components. The nitrogen distributor (8) is connected to a nitrogen storage tank (10) through an air inlet pipe (9). An air inlet valve is installed on the air inlet pipe (9). (91) and flow meter, an exhaust pipe (11) is provided on the upper part of the kneader body (2), an exhaust valve (12) and a vacuum pump (13) are provided on the exhaust pipe (11) in sequence, a pressure sensor is provided on the kneader body (2), a strip-shaped discharge port is machined on the bottom of the kneader body (2), a receiving groove (14) is installed on the bottom of the kneader body (2) outside the strip-shaped discharge port, a sealing mechanism that slides and cooperates with the strip-shaped discharge port is provided in the receiving groove (14), a discharge chute (15) is provided on both sides of the receiving groove (14), a screw conveyor (16) is installed at the end of the discharge chute (15), and a discharge port is provided at the end of the screw conveyor (16).
2. The oxygen-enriched kneading device for nitrogen-atomized aluminum powder according to claim 1, characterized in that: The feeding mechanism includes a feeding pipe (41), a first cylinder (42), and a sealing plate (43). A feeding port is machined on the top of the top cover (4). The feeding pipe (41) is vertically installed on the top of the top cover (4) outside the feeding port. A top plate is installed on the top of the feeding pipe (41). The fixed end of the first cylinder (42) is installed on the top plate. The sealing plate (43) is installed on the movable end of the first cylinder (42) and slides with the feeding port. A sealing ring is provided on the outside of the sealing plate (43). A feeding hopper (44) is installed on one side of the feeding pipe (41).
3. The oxygen-enriched kneading device for nitrogen-atomized aluminum powder according to claim 1, characterized in that: The sealing mechanism includes a second cylinder (141) and a sealing plate (142). There are 1 to 2 second cylinders (141). The fixed end of the second cylinder (141) is mounted on the frame (1). The movable end of the second cylinder (141) extends from below the receiving groove (14) to the inside of the receiving groove (14). The sealing plate (142) is mounted on the top of the movable end of the second cylinder (141) and slides in cooperation with the strip-shaped discharge port. A sealing ring is provided on the outer side of the sealing plate (142).
4. The oxygen-enriched kneading device for nitrogen-atomized aluminum powder according to claim 1, characterized in that: The heating assembly includes heating jackets (17) spaced apart on the outside of the kneader body (2). Multiple reinforcing connecting rods (18) are provided between the heating jackets (17) and the kneader body (2). A heating medium inlet is provided on the upper part of one side of the heating jackets (17), and a heating medium outlet is provided on the bottom of the other side.
5. The oxygen-enriched kneading device for nitrogen-atomized aluminum powder according to claim 4, characterized in that: The heating jacket (17) is provided with multiple sets of electric heating rods (19).
6. The oxygen-enriched kneading device for nitrogen-atomized aluminum powder according to claim 1, characterized in that: The spray assembly includes a spray pipe (20) and nozzles (21). The spray pipe (20) is rotatably installed inside the kneader body (2). One end of the spray pipe (20) inside the kneader body (2) is sealed by a sealing plate. The other end of the spray pipe (20) outside the kneader body (2) is connected to the liquid inlet pipe (6) by a rotating joint (22). A gear transmission mechanism for driving the spray pipe (20) to rotate is provided on the outside of the kneader body (2). The nozzles (21) are installed at equal intervals on the spray pipe (20) inside the kneader body (2).
7. The oxygen-enriched kneading device for nitrogen-atomized aluminum powder according to claim 6, characterized in that: The gear transmission mechanism includes a drive motor (23), a drive gear (24), and a driven gear (25). The drive motor (23) is mounted on the outside of the kneader body (2) via a support plate. The drive gear (24) is mounted on the output shaft of the drive motor (23). The driven gear (25) is mounted on the outer wall of the spray pipe (20) and meshes with the drive gear (24).
8. The oxygen-enriched kneading device for nitrogen-atomized aluminum powder according to claim 1, characterized in that: The nitrogen distributor (8) is a hollow box with an A-frame structure on the top surface and multiple air outlets evenly distributed on the bottom.