Microwave-enhanced manganese, iron and aluminum leaching device in manganese oxide slag
The leaching device, which combines microwave selective heating and mechanical stirring, solves the problem of low leaching efficiency of manganese, iron, and aluminum in manganese oxide slag, achieving efficient and energy-saving resource utilization and improving the corrosion resistance and intelligent operation of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WANBOLU MINING (CHINA) CO LTD
- Filing Date
- 2025-06-24
- Publication Date
- 2026-05-15
AI Technical Summary
Existing technologies are insufficient for efficiently leaching manganese, iron, and aluminum from manganese oxide slag. Traditional wet leaching methods are inefficient and energy-intensive, and existing microwave devices cannot achieve uniform heating and efficient stirring, which limits the development of resource utilization.
The leaching device employs a combination of microwave selective heating and mechanical stirring, along with precise temperature control and corrosion-resistant design. It utilizes a microwave-feeded deformer for focused heating and a DC motor for rotational stirring to ensure uniform mixing and heating of materials. Corrosion-resistant materials and coatings are used to protect the equipment.
It significantly improves the leaching efficiency of manganese, iron, and aluminum in manganese oxide slag, reduces energy consumption, extends equipment life, enables intelligent operation, reduces labor costs, and is suitable for the resource utilization of various manganese, iron, and aluminum-containing wastes.
Smart Images
Figure CN224243171U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of metallurgy and resource recycling technology, specifically relating to a microwave-enhanced leaching device for manganese, iron and aluminum in manganese oxide slag. Background Technology
[0002] In modern industrial production, the manganese smelting industry is booming. However, the resulting manganese oxide slag, as a solid waste, is gradually becoming a key factor restricting the sustainable development of the industry. Manganese oxide slag is rich in valuable metals such as manganese, iron, and aluminum. If it can be utilized as a resource, it can not only create considerable economic benefits for enterprises but also effectively alleviate resource shortages. However, currently, the resource utilization of manganese slag has become a bottleneck problem for the survival and development of electrolytic manganese dioxide enterprises. How to rationally develop and utilize manganese slag and eliminate its environmental pollution has become an important issue that enterprises must overcome to fulfill their social responsibility and achieve green development.
[0003] Traditional methods for extracting manganese, iron, aluminum, and other metals from manganese oxide slag primarily employ wet leaching. This process suffers from numerous drawbacks: low leaching efficiency, resulting in the incomplete extraction of valuable metals and resource waste; high energy consumption, with the lengthy reaction process consuming significant amounts of energy and substantially increasing production costs; and prolonged reaction times, extending production cycles and reducing enterprise efficiency. These problems severely limit the development of manganese oxide slag resource utilization, prompting the industry to continuously seek more efficient processing technologies.
[0004] With continuous technological advancements, microwave technology has gradually gained attention due to its unique advantages. Microwaves possess significant characteristics such as uniform heating, selective heating, and rapid reaction speed, demonstrating immense potential in the field of metal leaching. They can significantly improve leaching efficiency and effectively shorten reaction time. Theoretically, applying microwave technology to manganese oxide slag treatment can overcome the limitations of traditional wet leaching processes, bringing new hope for the resource utilization of manganese slag. However, current microwave technology lacks a dedicated device for microwave-enhanced leaching of manganese, iron, and aluminum from manganese oxide slag. Existing devices on the market cannot fully utilize the characteristics of microwaves, making it difficult to achieve uniform heating and efficient mixing of manganese oxide slag, and also unable to precisely adjust the microwave cavity energy, thus significantly reducing the effectiveness of microwave technology in manganese oxide slag treatment. Therefore, developing a microwave-enhanced leaching device that can fully utilize the characteristics of microwave technology to achieve high efficiency and energy saving is of significant practical importance and urgent need for promoting the resource utilization of manganese oxide slag and solving industry development challenges.
[0005] Chinese patent literature discloses an "ultrasonic oxygen-enriched leaching device" (publication number: CN222886750U). This device solves problems such as gas-liquid mixing and enhanced mass transfer during the leaching process, which helps to improve the leaching effect. However, the ultrasonic energy is easily attenuated and the heating is uneven in high-concentration slurry, which limits the dissociation efficiency of valuable metals. In addition, the equipment has defects in corrosion resistance design. The ultrasonic transducer and the inner wall of the reactor are not protected by corrosion-resistant materials or coatings, making them susceptible to corrosion by strong acid leaching solutions, which shortens the equipment life, increases maintenance costs, and poses a risk of pollution. Utility Model Content
[0006] This invention addresses the aforementioned problems by utilizing the selective heating, penetrating heating, and rapid heating characteristics of microwaves to enhance the leaching of manganese, iron, and aluminum from manganese oxide slag. It develops a device capable of uniform heating, mixing, and adjusting microwave cavity energy to promote efficient leaching of manganese, iron, and aluminum from manganese oxide slag. The equipment is energy-saving and environmentally friendly; selective microwave heating reduces energy waste, and the waste gas treatment system reduces environmental pollution. Operation is simple; the automated control system enables intelligent operation of the leaching process, reducing labor costs. It is suitable for the resource utilization of various solid wastes containing manganese, iron, and aluminum.
[0007] To achieve the above technical objectives, the present invention adopts the following technical solution:
[0008] A microwave-enhanced leaching device for manganese, iron, and aluminum in manganese oxide slag is characterized by comprising a rotating device, a microwave feed inlet, a microwave cavity, a temperature control system, and a leaching container. The rotating device is connected to the microwave cavity via a bearing. The microwave feed inlet is connected to the microwave cavity via a microwave feed deformer and a waveguide. The temperature control system's sensors and controller are connected to the microwave cavity and a DC motor. The leaching container is fixed on a container jacket inside the cavity.
[0009] Furthermore, the rotating device includes a DC motor, a transmission shaft bearing, and a container jacket.
[0010] Furthermore, the DC motor is disposed on the outer layer of the microwave cavity.
[0011] Furthermore, the portion of the drive shaft that enters the microwave cavity is hollow.
[0012] Furthermore, the bearing is embedded in the walls of the outer layer and the inner layer of the microwave cavity.
[0013] Furthermore, the container jacket is connected to the drive shaft.
[0014] Furthermore, the container jacket is made of polyethylene material.
[0015] Furthermore, the microwave cavity is configured to be square or hexagonal in shape.
[0016] Furthermore, the leaching container is made of polytetrafluoroethylene (PTFE).
[0017] Furthermore, the leaching container is covered with a fiber sleeve.
[0018] The technical principle of this utility model:
[0019] This invention achieves efficient leaching of valuable metals from manganese oxide slag by combining the synergistic effect of microwave and mechanical stirring with precise temperature control and corrosion-resistant design.
[0020] Microwave technology is the core technology of the device. The microwave feed deformer at the microwave feed inlet utilizes the directional focusing characteristics of microwaves at initial entry into the microwave cavity to focus the microwave energy onto the container being heated, allowing the microwave energy to be concentrated on the material in the leaching container. Controllable microwave magnetrons are installed on the left and right sides of the microwave cavity. Microwaves, through penetrating heating, cause the ions and polar molecules inside the material to vibrate at high speeds and generate heat through friction, achieving selective heating. This heating method can significantly reduce the activation energy of chemical reactions and accelerate the reaction rate of manganese, iron, aluminum, and other metal oxides with the leaching agent in manganese oxide slag.
[0021] A DC motor rotation device plays an auxiliary role in enhancing leaching efficiency. The DC motor drives the drive shaft to rotate, causing the container jacket connected to the drive shaft to rotate accordingly. Four to six holes in the container jacket secure the leaching container, allowing for repeated stirring of the sample and reactant within the container. This not only promotes thorough mixing of the material and the leaching agent but also ensures more uniform microwave heating, further improving leaching efficiency. The container jacket is made of polyethylene or polytetrafluoroethylene (PTFE), a material that does not absorb microwaves, ensuring that microwaves can penetrate and heat the material.
[0022] A temperature control system ensures the reaction proceeds within the optimal temperature range. An infrared temperature sensor monitors the temperature inside the reaction chamber in real time and sends the signal to the controller. The controller automatically adjusts the microwave power according to the set temperature, achieving precise temperature control. The microwave cavity is made of smooth stainless steel with a corrosion-resistant coating on the inner wall. Its square or hexagonal shape ensures uniform heating of the materials. A powerful exhaust fan at the top, connected to pipes, promptly removes waste gases generated during the reaction, maintaining stable pressure within the cavity. The leaching container is made of polytetrafluoroethylene (PTFE) with an outer fiber sleeve. An external bracket clamps the lid, and an internal safety valve effectively prevents damage from overpressure, ensuring safe reaction operation.
[0023] Compared with the prior art, the present invention has the following advantages:
[0024] At the technical principle level, most existing leaching devices rely on traditional heating or single physical enhancement methods, such as ultrasonic-assisted leaching, which have low energy utilization efficiency and uneven heating. This utility model innovatively integrates microwave selective heating and mechanical dynamic stirring technology. It utilizes high-frequency electromagnetic waves generated by a microwave magnetron to achieve internal self-heating of the material through ion conduction and dipole rotation, significantly reducing the reaction activation energy. At the same time, a DC motor drives the container jacket to rotate, ensuring thorough mixing of the material and the leaching agent, eliminating the microwave heating blind zone, and forming a synergistic enhancement mechanism of "internal heating-external stirring," significantly improving leaching efficiency.
[0025] From a structural design perspective, existing devices suffer from poor temperature control accuracy and insufficient corrosion resistance. This invention achieves precise temperature control through infrared temperature measurement and controller linkage, ensuring the reaction proceeds under optimal thermodynamic conditions. The microwave cavity is made of stainless steel with a corrosion-resistant coating, and combined with a PTFE leaching container and jacket, effectively resisting corrosion from strong acid leaching agents and extending the equipment's service life. Furthermore, the microwave feed deformer design at the microwave feed inlet utilizes the initial focusing characteristics of microwaves to directionally enhance the energy density of the target area, further improving heating efficiency. Attached Figure Description
[0026] Figure 1 This is a schematic diagram of the structure of the device of this utility model;
[0027] Figure 2 This is a top view of the device of this utility model.
[0028] In the attached diagram: 1-DC motor; 2-drive shaft; 3-bearing; 4-outer layer of microwave cavity; 5-inner layer of microwave cavity; 6-container jacket; 7-leaching container; 8-infrared thermometer; 9-microwave feed deformer; 10-waveguide; 11-magnetron; 12-controller; 13-exhaust fan. Detailed Implementation
[0029] The present utility model patent will be further described in detail below with reference to the accompanying drawings and examples:
[0030] Example 1
[0031] like Figure 1 As shown, a microwave-enhanced leaching device for manganese, iron, and aluminum in manganese oxide slag includes a DC motor rotating device, a microwave feed inlet, a microwave cavity, a temperature control system, and a leaching container.
[0032] The DC motor rotation device includes a DC motor 1, a drive shaft 2, a bearing 3, and a container jacket 6. The DC motor 1 is located on the outer layer 4 of the microwave cavity. The bearing 3 is embedded in the walls of the outer layer 4 and the inner layer 5 of the microwave cavity. The drive shaft 2 passes through the bearing 3, and the portion of the drive shaft 2 entering the microwave cavity is hollow. The container jacket 6 is connected to the drive shaft 2 and is made of polyethylene. The jacket has four holes for fixing the leaching container 7. The leaching container 7 is made of polytetrafluoroethylene (PTFE) and has an additional fiber sleeve on the outside. The dimensions of the leaching container 7 fit the fixing holes in the container jacket 6. A fixing frame is added to the outside of the leaching container 7 to clamp the container lid. A safety valve is installed in the leaching container 7. The DC motor 1 is connected to the drive shaft 2, and the rotation control of the DC motor 1 is connected to a controller 12, which controls the speed and start / stop. A microwave feed deformer 9 is installed at the microwave feed inlet. The microwave feed deformer 9 is located at the connection between the waveguide 10 and the microwave cavity and is used to focus microwave energy.
[0033] The microwave cavity is mainly made of smooth stainless steel with a corrosion-resistant coating on the inner wall. The cavity is square in shape. A powerful exhaust fan 13 is installed on the top of the microwave cavity and connected to a pipe for external exhaust. The microwave generator consists of two controllable and adjustable power microwave magnetrons 11 with a frequency of 2.45 GHz and a maximum power of 1000 W for each microwave. They are connected to a controller 12. The two magnetrons 11 are distributed and installed on the left and right sides of the microwave cavity, and the microwave power is set to 600 W.
[0034] The temperature control system includes a temperature sensor and a controller 12. Temperature monitoring is performed using an infrared thermometer 8. The infrared thermometer 8 signal is input to the controller 12, and the reaction temperature is set to 70°C.
[0035] Example 2
[0036] like Figure 1 As shown, a microwave-enhanced leaching device for manganese, iron, and aluminum in manganese oxide slag includes a DC motor rotating device, a microwave feed inlet, a microwave cavity, a temperature control system, and a leaching container.
[0037] The DC motor rotation device includes a DC motor 1, a drive shaft 2, a bearing 3, and a container jacket 6. The DC motor 1 is located on the outer layer 4 of the microwave cavity. The bearing 3 is embedded in the walls of the outer layer 4 and the inner layer 5 of the microwave cavity. The drive shaft 2 passes through the bearing 3, and the portion of the drive shaft 2 entering the microwave cavity is hollow. The container jacket 6 is connected to the drive shaft 2 and is made of polyethylene. The jacket has four holes for fixing the leaching container 7. The leaching container 7 is made of polytetrafluoroethylene (PTFE) and has an additional fiber sleeve on the outside. The dimensions of the leaching container 7 fit the fixing holes in the container jacket 6. A fixing frame is added to the outside of the leaching container 7 to clamp the container lid. A safety valve is installed in the leaching container 7. The DC motor 1 is connected to the drive shaft 2, and the rotation control of the DC motor 1 is connected to a controller 12, which controls the speed and start / stop. A microwave feed deformer 9 is installed at the microwave feed inlet. The microwave feed deformer 9 is located at the connection between the waveguide 10 and the microwave cavity and is used to focus microwave energy.
[0038] The microwave cavity is mainly made of smooth stainless steel with a corrosion-resistant coating on the inner wall. The cavity is hexagonal in shape. A powerful exhaust fan 13 is installed on the top of the microwave cavity and connected to a pipe for external exhaust. The microwave generator consists of two controllable and adjustable power microwave magnetrons 11 with a frequency of 2.45 GHz and a maximum power of 1000 W for each microwave. They are connected to a controller 12. The two magnetrons 11 are distributed and installed on the left and right sides of the microwave cavity, and the microwave power is set to 800 W.
[0039] The temperature control system includes a temperature sensor and a controller 12. Temperature monitoring is performed using an infrared thermometer 8. The infrared thermometer 8 signal is input to the controller 12, and the reaction temperature is set to 80°C.
[0040] Example 3
[0041] like Figure 1 As shown, a microwave-enhanced leaching device for manganese, iron, and aluminum in manganese oxide slag includes a DC motor rotating device, a microwave feed inlet, a microwave cavity, a temperature control system, and a leaching container.
[0042] The DC motor rotation device includes a DC motor 1, a drive shaft 2, a bearing 3, and a container jacket 6. The DC motor 1 is located on the outer layer 4 of the microwave cavity. The bearing 3 is embedded in the walls of the outer layer 4 and the inner layer 5 of the microwave cavity. The drive shaft 2 passes through the bearing 3, and the portion of the drive shaft 2 entering the microwave cavity is hollow. The container jacket 6 is connected to the drive shaft 2 and is made of polyethylene. The jacket has four holes for fixing the leaching container 7. The leaching container 7 is made of polytetrafluoroethylene (PTFE) and has an additional fiber sleeve on the outside. The dimensions of the leaching container 7 fit the fixing holes in the container jacket 6. A fixing frame is added to the outside of the leaching container 7 to clamp the container lid. A safety valve is installed in the leaching container 7. The DC motor 1 is connected to the drive shaft 2, and the rotation control of the DC motor 1 is connected to a controller 12, which controls the speed and start / stop. A microwave feed deformer 9 is installed at the microwave feed inlet. The microwave feed deformer 9 is located at the connection between the waveguide 10 and the microwave cavity and is used to focus microwave energy.
[0043] The microwave cavity is mainly made of smooth stainless steel with a corrosion-resistant coating on the inner wall. The cavity is square in shape. A powerful exhaust fan 13 is installed on the top of the microwave cavity and connected to a pipe for external exhaust. The microwave generator consists of two controllable and adjustable power microwave magnetrons 11 with a frequency of 2.45 GHz and a maximum power of 1000 W for each microwave. They are connected to a controller 12. The two magnetrons 11 are distributed and installed on the left and right sides of the microwave cavity, and the microwave power is set to 1000 W.
[0044] The temperature control system includes a temperature sensor and a controller 12. Temperature monitoring is performed using an infrared thermometer 8. The infrared thermometer 8 signal is input to the controller 12, and the reaction temperature is set to 90°C.
[0045] The working principle of the microwave-enhanced manganese, iron, and aluminum leaching device in manganese oxide slag according to this utility model is as follows:
[0046] A microwave-enhanced leaching device for manganese, iron, and aluminum from manganese oxide slag is disclosed. The drive shaft entering the microwave cavity is hollow, and a container jacket is connected to the drive shaft. Bearings are embedded in the inner and outer walls of the microwave cavity to fix the drive shaft. The container jacket is round and made of polyethylene, a non-microwave-absorbing material that allows microwaves to penetrate. Six holes are opened in the container jacket for fixing the leaching container. The leaching container is made of polytetrafluoroethylene (PTFE), a non-microwave-absorbing material that allows microwaves to penetrate. The leaching container is fixed in the jacket and rotated by a motor, ensuring uniform mixing of the sample and leaching agent within the container, thus improving metal leaching efficiency. The motor rotation control is connected to a controller, which controls the rotation speed and on / off operation.
[0047] The microwave cavity is made of stainless steel with a polished inner wall and a corrosion-resistant coating. The cavity is quadrilateral in shape. A powerful exhaust fan is installed at the top of the microwave cavity, connected to a duct for external exhaust. The microwave generator consists of two controllable and adjustable power magnetrons at a frequency of 2.45 GHz. Each magnetron has a maximum power of 1000 W and is connected to a controller. The microwave power is adjustable from 600 W to 1000 W. The two magnetrons are located on the left and right sides. A microwave feed deformer is installed at the microwave feed inlet. Utilizing the directional focusing characteristics of the initial microwave inlet, the microwave energy is fully utilized to heat the material, ensuring the reaction occurs within the optimal temperature range. The microwave feed deformer ensures that the microwave feed into the microwave cavity is focused on the container being heated from the very beginning.
[0048] The temperature control system primarily employs an infrared temperature sensor for temperature control. The infrared temperature signal is input to the controller to monitor the temperature inside the reaction chamber in real time and adjust the microwave power accordingly. The leaching container is made of polytetrafluoroethylene (PTFE), with an additional fiber sleeve added to the outside. The container dimensions fit the fixing holes in the container jacket. A fixing bracket is added to the outside of the container to clamp the container lid, and a safety valve is installed inside the container to prevent damage from overpressure.
[0049] Those skilled in the art will recognize that the examples described herein are intended to help the reader understand the principles of this invention, and should be understood as not limiting the scope of protection of this invention to such specific statements and embodiments. Those skilled in the art can make various other specific modifications and combinations based on these technical teachings disclosed herein without departing from the scope of this invention, and these modifications and combinations are still within the scope of protection of this invention.
Claims
1. A microwave-enhanced leaching device for manganese, iron, and aluminum from manganese oxide slag, characterized in that, The device includes a rotating device, a microwave feed inlet, a microwave cavity, a temperature control system, and an leaching container. The rotating device is connected to the microwave cavity via a bearing (3). The microwave feed inlet is connected to the microwave cavity via a microwave feed deformer (9) and a waveguide (10). The temperature control system's sensor and controller (12) are connected to the microwave cavity and a DC motor (1). The leaching container (7) is fixed on a container jacket (6) inside the cavity.
2. The microwave-enhanced manganese, iron, and aluminum leaching device for manganese oxide slag according to claim 1, characterized in that, The rotating device includes a DC motor (1), a drive shaft (2), a bearing (3), and a container jacket (6).
3. The microwave-enhanced manganese, iron, and aluminum leaching device for manganese oxide slag according to claim 2, characterized in that, The DC motor (1) is disposed on the outer layer (4) of the microwave cavity.
4. The microwave-enhanced manganese, iron, and aluminum leaching device for manganese oxide slag according to claim 2, characterized in that, The part of the drive shaft (2) that enters the microwave cavity is hollow.
5. The microwave-enhanced manganese, iron, and aluminum leaching device for manganese oxide slag according to claim 1, characterized in that, The bearing (3) is embedded in the walls of the outer layer (4) and the inner layer (5) of the microwave cavity.
6. The microwave-enhanced manganese, iron, and aluminum leaching device for manganese oxide slag according to claim 1, characterized in that, The container jacket (6) is connected to the drive shaft (2).
7. The microwave-enhanced manganese, iron, and aluminum leaching device for manganese oxide slag according to claim 1, characterized in that, The container jacket (6) is made of polyethylene.
8. The microwave-enhanced manganese, iron, and aluminum leaching device for manganese oxide slag according to claim 1, characterized in that, The microwave cavity is configured to be square or hexagonal in shape.
9. The microwave-enhanced manganese, iron, and aluminum leaching device for manganese oxide slag according to claim 1, characterized in that, The leaching container (7) is made of polytetrafluoroethylene.
10. The microwave-enhanced manganese, iron, and aluminum leaching device for manganese oxide slag according to claim 1, characterized in that, The leaching container (7) is covered with a fiber sleeve.