Anti-scaling lithium concentrate channelization dissolution reactor
By combining a double-layered electrothermal reactor with a scraped mixing paddle and an auger discharge assembly, the problems of blockage and reduced heat transfer efficiency caused by precipitate accumulation in the lithium concentrate pipeline leaching reactor were solved, achieving efficient solid-liquid separation and reaction stability.
Patent Information
- Application Number
- CN202511085692.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-04
- Publication Date
- 2025-12-19
AI Technical Summary
In the pipeline leaching process of lithium concentrate, the accumulation of precipitates on the reactor wall leads to blockage and reduced heat transfer efficiency, affecting reaction efficiency and stability, and is difficult to remove.
The system employs a double-layered electrothermal reactor combined with a wall-scraping mixing impeller and an auger discharge assembly. The wall-scraping mixing impeller removes sediment, while the auger discharge assembly discharges solid sediment. The combination of bevel gear reversing drive and sprocket reduction drive structure ensures smooth material mixing and discharge.
It improves the efficiency of lithium ore leaching reaction and the stability of equipment operation, realizes solid-liquid separation and continuous material discharge, reduces the risk of scaling and clogging, and ensures temperature uniformity and full contact of reactants in the reactor.
Smart Images
Figure CN121155463A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of lithium concentrate processing reaction equipment technology, specifically an anti-scaling lithium concentrate pipeline leaching reactor. Background Technology
[0002] In the high-temperature reaction pipeline stage of the lithium concentrate leaching process, spodumene concentrate undergoes a core chemical reaction with concentrated sulfuric acid under continuous high temperature and pressure. This reaction disrupts the originally stable α-spodumene structure, converting the lithium element into soluble lithium sulfate, while releasing major impurities such as aluminum and silicon. As the reaction conditions change, lithium ions in the ore are gradually released into the liquid phase, forming a viscous solution. This slurry is rich in lithium salts and other dissolved mineral components, providing a foundation for subsequent extraction and purification. The high-temperature environment helps accelerate the mineral dissolution process and improve reaction efficiency, but it may also trigger some side reactions, leading to excessive concentration of certain impurities or mineral components in the solution, especially when the concentration of certain ions in the solution is too high or the pH value is too low. When changes occur, some dissolved minerals precipitate, forming solid particles. These precipitates may include minerals such as lithium carbonate and silicates. The accumulation of these precipitates on the reactor wall gradually forms a solid layer. This solid layer hinders the flow of materials within the reactor, slowing down the slurry flow rate and even causing blockages in some areas. This not only affects the sufficient contact of reactants and reaction efficiency but may also cause local pressure increases, raising the operational risk of the equipment. Furthermore, the precipitates deposited on the reactor wall are difficult to completely remove. Over time, the precipitates accumulate, forming a thick sediment layer. The presence of this sediment layer also reduces heat transfer efficiency, making the temperature distribution within the reactor uneven and affecting the stability and consistency of the reaction. Summary of the Invention
[0003] The purpose of this invention is to provide an anti-scaling lithium concentrate pipeline leaching reactor, in which the treated spodumene concentrate and concentrated sulfuric acid are fed into a double-layered electrothermal reactor. During the leaching reaction, a geared motor drives the auger discharge assembly below the double-layered electrothermal reactor. Simultaneously, the auger discharge assembly transmits power to the wall-scraping mixing paddle in the double-layered electrothermal reactor through a bevel gear reversing transmission structure and a sprocket reduction transmission structure. The wall-scraping mixing paddle mixes the materials and scrapes off the precipitates adhering to the inner wall of the reactor during the leaching reaction. After the reaction, the resulting slurry is discharged through the discharge pipe of the double-layered electrothermal reactor. Then, the geared motor is turned on, and the resulting solid precipitates are discharged through a square-mouth guide hopper and the auger discharge assembly, thereby solving the problems mentioned in the background art.
[0004] To achieve the above objectives, the present invention provides the following technical solution: an anti-scaling lithium concentrate pipeline leaching reactor, comprising:
[0005] An external frame is provided, and a double-layered electrothermal reactor in a horizontal position is installed at the top of the external frame. Feed ports and discharge pipes are respectively installed on the left and right outer walls of the double-layered electrothermal reactor. A wall-scraping mixing paddle is installed at the central axis position inside the double-layered electrothermal reactor. One end of the wall-scraping mixing paddle extends to the outside of the double-layered electrothermal reactor and is equipped with a sprocket reduction transmission structure.
[0006] An inner frame is located inside the outer frame. A top-mounted feed hopper is installed at the top of the inner frame. The upper end of the top-mounted feed hopper is connected to the lower solid phase discharge outlet of the double-layered electrothermal reactor. An electric flap gate is installed inside the top-mounted feed hopper. An auger-type discharge assembly is installed inside the inner frame at the lower end of the top-mounted feed hopper. The central axis of the auger-type discharge assembly and the double-layered electrothermal reactor is perpendicular in a top-view projection. A geared motor for driving the auger-type discharge assembly is installed on one outer wall of the inner frame. A bevel gear reversing transmission structure for maintaining power connection is installed between the auger-type discharge assembly and the sprocket reduction transmission structure. A control box electrically connected to the input end of the geared motor, the electric flap gate, and the double-layered electrothermal reactor is installed on one outer wall of the outer frame.
[0007] Preferably, the double-layered electrothermal reactor consists of an outer tank fixed to the top of the outer frame, an inner reaction tank installed at the central axis position inside the outer tank, and a heat-conducting sleeve installed on the outer circumference of the inner reaction tank. An electric heating rod is installed inside the heat-conducting sleeve, and the input end of the electric heating rod is electrically connected to the output end of the control box.
[0008] Preferably, two No. 2 liquid inlet valves are installed on the outer wall of the outer tank near the sprocket reduction transmission structure. One end of the No. 2 liquid inlet valve extends into the interlayer between the outer tank and the inner reaction tank. A No. 1 liquid inlet valve is installed at both the front and rear positions of the top of the outer tank. The lower end of the No. 1 liquid inlet valve extends into the interior of the heat-conducting sleeve. A first liquid drain valve is installed on one side of the bottom of the outer tank. The upper end of the first liquid drain valve extends into the interlayer between the outer tank and the inner reaction tank. A second liquid drain valve is installed on the bottom of the outer tank on the side of the first liquid drain valve. The upper end of the second liquid drain valve extends into the heat-conducting sleeve.
[0009] Preferably, the scraper-type mixing slurry is located at the central axis position inside the inner reaction tank, the feeding port is located on one side of the outer wall of the outer tank and communicates with the inner reaction tank, the discharge pipe is installed on the other side of the outer tank and one end of the discharge pipe is communicated with the inner reaction tank, and the upper end of the upper guide hopper extends into the interior of the inner reaction tank.
[0010] Preferably, the scraper-type mixing paddle includes a central shaft rotatably mounted on the central axis of the inner reaction tank via bearings, material-pulling plates fixed at both ends of the central shaft surface, and a descaling plate integrally formed between the upper and lower ends of the two material-pulling plates. The side of the descaling plate away from the central axis of the central shaft is in contact with the inner wall of the inner reaction tank.
[0011] Preferably, the auger discharge assembly includes a receiving cylinder installed inside the inner frame, an auger shaft rotatably installed inside the receiving cylinder, and a screen installed on one side of the bottom end of the receiving cylinder. One end of the auger shaft extends through to the outside of the receiving cylinder and is fixedly connected to the drive shaft of the geared motor via a coupling. The other end of the auger shaft also extends through to the outside of the receiving cylinder and drives the central shaft to rotate via a bevel gear reversing transmission structure and a sprocket reduction transmission structure.
[0012] Preferably, the lower end of the upper guide hopper is connected to the receiving cylinder, and the top end of the receiving cylinder is provided with a hollowed-out part that communicates with the upper guide hopper.
[0013] Preferably, a discharge hopper is installed at the bottom of the receiving cylinder below the screen, and a material control valve is installed at the bottom of the discharge hopper.
[0014] Preferably, the bevel gear reversing transmission structure includes a driving bevel gear fixed to the other end of the auger shaft, a horizontal shaft rotatably mounted on the outer wall of one side of the outer frame via a bearing seat, and a driven bevel gear fixed to one end of the horizontal shaft near the auger shaft. The driven bevel gear and the driving bevel gear mesh with each other.
[0015] Preferably, the sprocket reduction transmission structure includes a secondary sprocket fixed at one end of the central shaft, a driven bevel gear at one end of the horizontal shaft, and a double sprocket shaft rotatably mounted on the outer wall of one side of the outer frame. A primary chain is installed between the double sprocket shaft and the primary sprocket, and a secondary chain is installed between the double sprocket shaft and the secondary sprocket.
[0016] Compared with the prior art, the beneficial effects of this invention are as follows: This anti-scaling lithium concentrate pipeline leaching reactor is equipped with an external frame, a double-layered electrothermal reactor, a discharge pipe, an inner frame, a square-mouthed guide hopper, an electric flap gate, an auger discharge assembly, and a geared motor, a bevel gear reversing transmission structure, and a sprocket reduction transmission structure, among other mutually cooperating components. Lithium spodumene concentrate and concentrated sulfuric acid are fed into the double-layered electrothermal reactor. During the leaching reaction, the geared motor drives the auger discharge assembly below the double-layered electrothermal reactor. Simultaneously, the auger discharge assembly transmits power to the wall-scraping mixing paddle in the double-layered electrothermal reactor through the bevel gear reversing transmission structure and the sprocket reduction transmission structure. The wall-scraping mixing paddle... The mixture is stirred and the slurry is used to remove the precipitates adhering to the inner wall of the reactor during the leaching reaction. After the reaction is completed, the slurry is discharged through the discharge pipe of the double-layered electrothermal reactor. Then, the geared motor is turned on so that the solid precipitates generated are discharged through the square-mouth guide hopper and the screw conveyor assembly. This achieves the purpose of anti-scaling and solid-liquid separation of materials. By utilizing the thermal control advantages of the double-layered structure and the high-efficiency discharge capacity of the screw conveyor assembly, combined with the thorough mixing and descaling function of the wall-scraping mixing slurry, the efficiency of lithium ore leaching and extraction reaction and the operational stability of the equipment are greatly improved. It effectively solves the problems of scaling and clogging, realizes continuous and efficient discharge of materials and solid-liquid separation, and provides a reliable slurry raw material basis for the efficient utilization of lithium resources.
[0017] The double-layered structure design makes the heating and temperature control of the reactor more uniform, allowing heat to penetrate evenly into the reactants through radiation and heat conduction, ensuring stable temperature during the reaction process and facilitating the full dissolution of minerals. Furthermore, the electrothermal heating method allows the reactor to respond quickly to temperature changes, reducing heat loss and improving energy efficiency. The bevel gear reversing transmission structure and sprocket reduction transmission structure distribute the power from the single geared motor to the auger discharge assembly and the wall-scraping mixing paddle, ensuring stable operation of the wall-scraping mixing paddle in high-solids slurry. During rotation, the paddle continuously scrapes the wall surface, removing nascent microcrystalline precipitates or adhered colloids before they form a stable scale layer, reducing the incidence of scaling problems. Timely removal of precipitates prevents excessive accumulation within the reactor, avoiding the formation of an insulation layer and ensuring constant thermal conductivity between the inner wall and the material. This eliminates the temperature distribution imbalance caused by scale buildup, ensuring sufficient solid-liquid contact within the reactor and improving reactant conversion and dissolution efficiency.
[0018] Secondly, after the dissolution reaction is completed, the low-solids lithium sulfate solution is discharged through the discharge pipe by gravity and external pump equipment. Then, the thick precipitate is directionally extruded by the control of the upper guide hopper, electric flap gate, and auger discharge assembly, achieving effective solid-liquid separation. This ensures continuous operation of the reactor, reduces downtime for cleaning, and improves material recovery efficiency. Furthermore, the efficient solid-liquid separation helps with subsequent purification and processing steps, further ensuring the purity and quality of the product. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 ;
[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 ;
[0021] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 3 ;
[0022] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the present invention. Figure 1 ;
[0023] Figure 5 This is a schematic diagram of the three-dimensional cross-sectional structure of the present invention. Figure 2 ;
[0024] Figure 6 This is a schematic diagram of the three-dimensional cross-sectional structure of the outer tank in Embodiment 2 of the present invention;
[0025] Figure 7 This is a three-dimensional structural diagram of the sprocket reduction transmission structure according to Embodiment 3 of the present invention;
[0026] Figure 8 This is a three-dimensional structural diagram of the auger-type discharge assembly and the upper guide hopper connected in the third embodiment of the present invention.
[0027] In the diagram: 1. Outer frame; 2. Inner frame; 3. Outer tank; 301. No. 1 inlet valve; 302. No. 2 inlet valve; 303. Feed inlet; 304. Electric heating rod; 4. Inner reaction tank; 401. Discharge pipe; 5. Heat-conducting jacket; 6. Scraper-type mixing paddle; 601. Central shaft; 602. Feeding plate; 603. Descaling plate; 7. Screw-type discharge assembly; 701. Receiving cylinder; 702. Screw shaft; 703. Screen; 704. Discharge hopper; 705. Material control device. 8. Valve; 9. Upper guide hopper; 10. Electric flap gate; 11. Bevel gear reversing transmission structure; 12. Horizontal shaft; 13. Driven bevel gear; 14. Driving bevel gear; 15. Sprocket reduction transmission structure; 16. Double sprocket shaft; 17. Primary sprocket; 18. Primary chain; 19. Secondary sprocket; 10. Secondary chain; 11. Control box; 12. Gear motor; 13. First drain valve; 14. Second drain valve. Detailed Implementation
[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0029] Example 1, by Figures 1 to 5 The present invention includes an outer frame 1, on the top of which is a double-layered electrothermal reactor in a horizontal position. Feed inlets 303 and discharge pipes 401 are respectively installed on the left and right outer walls of the double-layered electrothermal reactor. A wall-scraping mixing paddle 6 is installed at the central axis position inside the double-layered electrothermal reactor. One end of the wall-scraping mixing paddle 6 extends through to the outside of the double-layered electrothermal reactor and is equipped with a sprocket reduction transmission structure 11.
[0030] The inner frame 2 is located inside the outer frame 1. The top of the inner frame 2 is equipped with an upper opening guide hopper 8. The upper end of the upper opening guide hopper 8 is connected to the lower solid phase discharge outlet of the double-layered electrothermal reactor. An electric flap gate 9 is installed inside the upper opening guide hopper 8. The auger discharge assembly 7 is installed inside the inner frame 2 at the lower end of the upper opening guide hopper 8. The central axis of the auger discharge assembly 7 and the double-layered electrothermal reactor is vertical in the top view projection plane. A geared motor 13 is installed on one side of the outer wall of the inner frame 2 to drive the auger discharge assembly 7. A bevel gear reversing transmission structure 10 is installed between the auger discharge assembly 7 and the sprocket reduction transmission structure 11 to maintain power connection. A control box 12 is installed on one side of the outer wall of the outer frame 1 and is electrically connected to the input end of the geared motor 13, the electric flap gate 9, and the double-layered electrothermal reactor.
[0031] The double-layered electrothermal reactor consists of an outer tank 3 fixed at the top of the outer frame 1, an inner reaction tank 4 installed at the central axis position inside the outer tank 3, and a heat-conducting sleeve 5 installed on the outer circumference of the inner reaction tank 4. An electric heating rod 304 is installed inside the heat-conducting sleeve 5. The input end of the electric heating rod 304 is electrically connected to the output end of the control box 12. The upper end of the upper feed hopper 8 extends into the interior of the inner reaction tank 4.
[0032] The staff turns on the electric heating rod 304 through the control box 12 to operate the electric heating rod 304 to continuously heat the heat transfer fluid in the heat conduction sleeve 5. Through heat conduction and insulation, the temperature distribution in the inner reaction tank 4 is controlled to avoid local overheating or uneven cooling, thereby ensuring the stability of the reaction conditions.
[0033] Two No. 2 liquid inlet valves 302 are installed on the outer wall of the outer tank 3 near the sprocket reduction transmission structure 11. One end of the No. 2 liquid inlet valve 302 extends into the interlayer between the outer tank 3 and the inner reaction tank 4. A No. 1 liquid inlet valve 301 is installed at the front and rear positions of the top of the outer tank 3. The lower end of the No. 1 liquid inlet valve 301 extends into the interior of the heat-conducting sleeve 5. The lithium spodumene concentrate and concentrated sulfuric acid to be reacted are fed into the inner reaction tank 4 through the feed port 303. The No. 2 liquid inlet valve 302 introduces the external heat transfer fluid into the interlayer between the outer tank 3 and the inner reaction tank 4, while the No. 1 liquid inlet valve 301 introduces the external heat transfer fluid into the heat-conducting sleeve 5, so that two heating sleeves are formed on the outside of the inner reaction tank 4.
[0034] A first drain valve 14 is installed on one side of the bottom of the outer tank 3. The upper end of the first drain valve 14 extends into the interlayer between the outer tank 3 and the inner reaction tank 4. A second drain valve 15 is installed on the bottom of the outer tank 3 on one side of the first drain valve 14. The upper end of the second drain valve 15 extends into the heat-conducting sleeve 5. The first drain valve 14 is used to discharge the heat transfer fluid in the interlayer between the outer tank 3 and the inner reaction tank 4, while the second drain valve 15 is used to discharge the heat transfer fluid in the heat-conducting sleeve 5.
[0035] The scraper-type mixing slurry 6 is located at the central axis position inside the inner reaction tank 4. The feeding port 303 is located on one side of the outer wall of the outer tank 3 and is connected to the inner reaction tank 4. The discharge pipe 401 is installed on the other side of the outer tank 3, and one end of the discharge pipe 401 is connected to the inner reaction tank 4. The discharge pipe 401 is connected to the feed end of the external pump equipment to ensure the smooth discharge of the slurry after the reaction is completed. A cover structure can also be installed at the end of the feeding port 303 to keep the inner reaction tank 4 in a sealed state.
[0036] Example 2, based on Example 1, is... Figure 5The scraping mixing paddle 6 includes a central shaft 601 mounted on the central axis of the inner reaction tank 4 via bearings, material-pulling plates 602 fixed at both ends of the central shaft 601, and a descaling plate 603 integrally formed between the upper and lower ends of the two material-pulling plates 602. The side of the descaling plate 603 away from the central axis of the central shaft 601 is in contact with the inner wall of the inner reaction tank 4. The rotational power of the geared motor 13 is transmitted to the central shaft 601 through the bevel gear reversing transmission structure 10 and the sprocket reduction transmission structure 11. The central shaft 601 drives the material-pulling plates 602 on both sides to rotate. By utilizing the contact between the descaling plate 603 and the inner wall of the inner reaction tank 4, the reaction and descaling are carried out simultaneously through the real-time mechanical intervention of the material-pulling plates 602 and the descaling plate 603, the hydrodynamic conditions for the directional deposition of precipitates are disrupted, and the problem of temperature distribution imbalance caused by the thickening of the scale layer is eliminated.
[0037] Example 3, based on Example 2, by Figure 7 and Figure 8 The auger discharge assembly 7 provides continuous and uniform material propulsion, ensuring efficient discharge of solid sediments and residual materials at different reaction stages, avoiding blockages and equipment damage caused by material accumulation. The auger discharge assembly 7 includes a receiving cylinder 701 installed inside the inner frame 2, an auger shaft 702 rotatably installed inside the receiving cylinder 701, and a screen 703 installed on one side of the bottom end of the receiving cylinder 701. One end of the auger shaft 702 extends through to the outside of the receiving cylinder 701 and is fixedly connected to the drive shaft of the geared motor 13 via a coupling. The other end of the auger shaft 702 also extends through to the outside of the receiving cylinder 701 and drives the central shaft 601 to rotate via a bevel gear reversing transmission structure 10 and a sprocket reduction transmission structure 11. The lower end of the upper guide hopper 8 is connected to the receiving cylinder 701. The top of the receiving cylinder 701 is provided with a hollow part that communicates with the upper guide hopper 8.
[0038] A discharge hopper 704 is installed at the bottom of the receiving cylinder 701 below the screen 703, and a control valve 705 is installed at the bottom of the discharge hopper 704. During the solid removal stage, the operator opens the electric flap gate 9 through the control box 12. The electric flap gate 9 makes the inner reaction tank 4, the upper guide hopper 8, and the receiving cylinder 701 open. Then, the wet slurry material enters the receiving cylinder 701 through the upper guide hopper 8 and the electric flap gate 9. The drive shaft of the reduction motor 13 drives the auger shaft 702 to rotate. The auger shaft 702 pushes the wet slurry material towards the screen 703 until the filtered wet slurry material is discharged through the discharge hopper 704 and the control valve 705, completing the solid-liquid separation of the material in the inner reaction tank 4.
[0039] The bevel gear reversing transmission structure 10 includes a driving bevel gear 1003 fixed to the other end of the auger shaft 702, a horizontal shaft 1001 rotatably mounted on the outer wall of one side of the outer frame 1 via a bearing seat, and a driven bevel gear 1002 fixed to one end of the horizontal shaft 1001 near the auger shaft 702. The driven bevel gear 1002 and the driving bevel gear 1003 mesh with each other. The sprocket reduction transmission structure 11 includes a secondary sprocket 1104 fixed to one end of the central shaft 601, a driven bevel gear 1002 at one end of the horizontal shaft 1001, and a double sprocket shaft 1101 rotatably mounted on the outer wall of one side of the outer frame 1. A primary chain 1103 is installed between the double sprocket shaft 1101 and the primary sprocket 1102, and a secondary chain 1105 is installed between the double sprocket shaft 1101 and the secondary sprocket 1104.
[0040] When the auger shaft 702 is driven to rotate by the geared motor 13, the auger shaft 702 drives the horizontal shaft 1001 to rotate through the active bevel gear 1003 and the driven bevel gear 1002. Then, the horizontal shaft 1001 drives the double sprocket shaft 1101 to rotate through the first-stage sprocket 1102 and the first-stage chain 1103. The double sprocket shaft 1101 transmits the rotational power to the central shaft 601 through the second-stage chain 1105 and the second-stage sprocket 1104, so that the scraper-type mixing paddle 6 and the auger-type discharge assembly 7 simultaneously receive the rotational power from the geared motor 13, realizing the synchronous control of the mixing and discharge of materials in the reactor.
[0041] In this embodiment of the application, the cleanliness of the inner wall of the double-layered electrothermal reactor supported by the outer frame 1 is first checked to ensure that there is no material adhering to the wall-scraping mixing slurry 6. The upper guide hopper 8 in the inner frame 2 is verified to be sealed and connected to the lower discharge port of the double-layered electrothermal reactor. The electric flap gate 9 is closed to lock the solid phase discharge channel. Then, the auger discharge assembly 7 is rotated using the reduction motor 13 to confirm that there is no mechanical obstruction. The power supply to the control box 12 is turned on to activate the reduction motor 13 to drive the auger discharge assembly 7. During the process, the scraper-type mixing paddle 6 is driven to idle through the bevel gear reversing transmission structure 10 and the sprocket reduction transmission structure 11. The uniformity of the gap between the scraper-type mixing paddle 6 and the inner wall of the double-layered electrothermal reactor is observed, and abnormal noises from the sprocket are listened for. The machine is stopped and ready for operation after the transmission chain runs smoothly. The pretreated spodumene concentrate is fed into the double-layered electrothermal reactor through the feeding port 303. The process is stopped once the liquid level reaches the working volume. Concentrated sulfuric acid is injected into the double-layered electrothermal reactor through a metering pump, controlling the acid-ore molar ratio. The acid injection process is then initiated. The wall-scraping impeller stirs at low speed. After all materials have been added, the speed-reducing motor 13 and the wall-scraping mixing impeller 6 are increased to the operating speed. The wall-scraping mixing impeller 6 continuously scrapes the inner wall and forcibly mixes the materials, initiating the acid hydrolysis and dissolution reaction. The cutting edge of the wall-scraping mixing impeller 6 peels the initial precipitate from the inner wall of the reactor and disperses the solid particles into the main body of the slurry through the swirling action of the impeller blades. According to the preset reaction time and temperature parameters, when the slurry becomes a homogeneous and viscous state and no particle reflection is observed through the sight glass, the dissolution is marked as complete. After dissolution is completed, the working... Personnel stop heating the reactor and rotating the scraper-type mixing paddle 6. After the material settles, the lithium sulfate-containing liquid phase is discharged through the discharge pipe 401 under the action of gravity and the pumping of the external conveying pump. Then, the electric flap gate 9 is opened through the control box 12. At this time, the upper guide hopper 8 and the double-layer electric heating reactor are connected. Then, the precipitate is pushed by the spiral blades of the auger discharge assembly 7 and output in a direction. The personnel place the receiving bucket at the discharge end of the auger discharge assembly 7 to receive the discharged wet slurry material.
[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.
[0043] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An anti-fouling type lithium concentrate pipeline digestion reactor, characterized by, The utility model relates to a double-layered electric heating reactor, which comprises an outer frame (1) and an inner frame (2). The double-layered electric heating reactor is composed of an outer tank (3) fixed on the top end of the outer frame (1), an inner reaction tank (4) installed on the inner tank (3) and a heat conduction sleeve (5) installed on the outer periphery of the inner reaction tank (4). The outer tank (3) is provided with two No. 2 liquid inlet valves (302) on the side wall near the chain wheel reduction transmission structure (11), one end of the No. 2 liquid inlet valve (302) extending into the interlayer between the outer tank (3) and the inner reaction tank (4), a No. 1 liquid inlet valve (301) installed on the top end of the outer tank (3), the lower end of the No. 1 liquid inlet valve (301) extending into the inner heat conduction sleeve (5), a first liquid outlet valve (14) installed on one side of the bottom end of the outer tank (3), the upper end of the first liquid outlet valve (14) extending into the interlayer between the outer tank (3) and the inner reaction tank (4), and a second liquid outlet valve (15) installed on the bottom end of the outer tank (3) on the side of the first liquid outlet valve (14), the upper end of the second liquid outlet valve (15) extending into the heat conduction sleeve (5).
2. The anti-fouling lithium concentrate pipe-in reactor according to claim 1, characterized in that: 3. The anti-fouling lithium concentrate pipe-in reactor of claim 2, wherein: 4. The anti-fouling lithium concentrate pipe-in reactor of claim 2, wherein: The wall-scraping mixing paddle (6) is arranged at the middle axis position inside the inner reaction tank (4), the feeding port (303) is arranged on the outer wall of the outer tank (3) and communicates with the inner reaction tank (4), the discharge pipe (401) is installed on the other outer wall of the outer tank (3), one end of the discharge pipe (401) communicates with the inner reaction tank (4), and the upper end of the upper port material guiding hopper (8) extends to the inside of the inner reaction tank (4).
5. The anti-fouling lithium concentrate pipe-in reactor of claim 4, wherein: The wall-scraping mixing paddle (6) comprises a middle shaft (601) rotatably arranged at the middle axis position inside the inner reaction tank (4), a stirring plate (602) fixed at both ends of the surface of the middle shaft (601), and a descaling plate (603) integrally formed between the upper and lower ends of the two stirring plates (602), wherein the side of the descaling plate (603) away from the middle axis of the middle shaft (601) is in contact with the inner wall of the inner reaction tank (4).
6. An anti-fouling lithium concentrate pipe-in reaction reactor according to claim 5, characterized in that: The auger type discharging assembly (7) comprises a receiving cylinder (701) installed inside the inner frame (2), an auger shaft (702) rotatably arranged inside the receiving cylinder (701), and a screen (703) installed on one side of the bottom end of the receiving cylinder (701), one end of the auger shaft (702) penetrates to the outside of the receiving cylinder (701) and is fixedly connected through a shaft coupling and the driving shaft of a speed reducer motor (13), the other end of the auger shaft (702) also penetrates to the outside of the receiving cylinder (701) and drives the rotation of the middle shaft (601) through the umbrella gear reversing transmission structure (10) and the chain wheel speed reduction transmission structure (11).
7. An anti-fouling lithium concentrate pipe-in reaction reactor according to claim 6, characterized in that: The lower end of the upper port material guiding hopper (8) is connected with the receiving cylinder (701), and the top end of the receiving cylinder (701) is provided with a hollow part in communication with the upper port material guiding hopper (8).
8. The anti-fouling lithium concentrate pipe-in reactor of claim 7, wherein: A discharge hopper (704) is installed at the bottom end of the receiving cylinder (701) below the screen (703), and a material control valve (705) is installed at the bottom end of the discharge hopper (704).
9. The anti-fouling lithium concentrate pipe-in reactor of claim 6, wherein: The umbrella gear reversing transmission structure (10) comprises a driving umbrella gear (1003) fixed at the other end of the auger shaft (702), a horizontal shaft (1001) rotatably arranged on the outer wall of one side of the outer frame (1), and a driven umbrella gear (1002) fixed at one end of the horizontal shaft (1001) close to the auger shaft (702), wherein the driven umbrella gear (1002) and the driving umbrella gear (1003) are in meshing engagement.
10. The anti-fouling lithium concentrate pipe-in reactor of claim 9, wherein: The chain wheel speed reduction transmission structure (11) comprises a secondary chain wheel (1104) fixed at one end of the middle shaft (601), a driven umbrella gear (1002) at one end of the horizontal shaft (1001), and a double chain wheel shaft (1101) rotatably arranged on the outer wall of one side of the outer frame (1), wherein a primary chain (1103) is installed between the double chain wheel shaft (1101) and a primary chain wheel (1102), and a secondary chain (1105) is installed between the double chain wheel shaft (1101) and the secondary chain wheel (1104).