Rare earth oxalic acid precipitation firing system
The automated processing of the rare earth oxalic acid precipitation and calcination system has solved the problem of reliance on manual operation for oxalate precipitate transfer, achieving efficient production and high-quality calcination results.
Patent Information
- Application Number
- CN202423154737.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-20
AI Technical Summary
In existing rare earth production processes, the transfer of oxalate precipitates relies on manual operation, resulting in wasted labor and low production efficiency. Furthermore, the oxalate precipitates are moist and prone to sticking to the walls, increasing the difficulty of calcination.
A rare earth oxalic acid precipitation and calcination system was designed, including a feed tank, an oxalic acid heat preservation tank, an oxalic acid dissolving kettle, a suction filter box, a screw feeder, and a calcination tank. By utilizing the stirring mechanism of the screw feeder and the auger conveying mechanism of the calcination tank, the system can automatically process oxalic acid precipitates, prevent clogging and adhesion, and improve production efficiency.
By automating the processing of oxalic acid precipitates, labor input is reduced, production efficiency is improved, oxalic acid precipitates are burned more thoroughly, and product quality is enhanced.
Smart Images
Figure CN223620450U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of rare earth production technology, and in particular to a rare earth oxalic acid precipitation and calcination system. Background Technology
[0002] Rare earth production involves acid dissolution (adding hydrochloric acid to dissolve the raw material), extraction (purifying to obtain a single element), precipitation (adding oxalic acid to form a precipitate), and calcination. Calcination is used to burn off the oxalic acid, resulting in rare earth oxides. Rare earth production involves crushing and preliminary refining the raw ore to form basic raw materials. These basic raw materials then undergo the above steps to form rare earth oxides. The calcination process involves burning oxalic acid at high temperatures, causing oxalic acid ions to combine with rare earth ions, thus forming rare earth oxides and completing the production process.
[0003] In the existing technology, after acid extraction, the material is added to oxalic acid and transferred to a vacuum filter box for precipitation. The precipitated solid material is then manually bent down and dug into a rare earth bowl before proceeding to the next process. This process consumes a lot of human resources, resulting in a waste of labor and reduced production efficiency. In addition, the generated oxalate precipitate is relatively moist and tends to stick to the wall, which makes it difficult to ignite and feed the oxalate precipitate. Summary of the Invention
[0004] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a rare earth oxalic acid precipitation and calcination system, which designs a feeding device based on the characteristics of oxalate precipitates to improve production efficiency.
[0005] The purpose of this utility model is achieved as follows:
[0006] A rare earth oxalic acid precipitation and calcination system includes a feed tank, an oxalic acid heat preservation tank, an oxalic acid dissolving kettle, an organic solvent reaction kettle, multiple suction filter boxes, a screw feeder, a precipitate bowl, and a calcination tank. The feed tank and the oxalic acid heat preservation tank are respectively connected to the inlet of the oxalic acid dissolving kettle, and the outlet of the oxalic acid dissolving kettle is connected to the organic solvent reaction kettle. A traveling crane is provided above the suction filter boxes and the precipitate bowl.
[0007] The outlet of the organic solvent reactor is connected to a filtration box for sedimentation. The filtration box is equipped with a filter screen. The overhead crane lifts the filter screen containing the oxalic acid precipitate from the filtration box to the screw feeder and feeds the oxalic acid precipitate into the screw feeder.
[0008] The screw feeder includes a base and a body mounted on the base. A screw is installed inside the body, with one end of the screw extending out of the body and connected to a reducer. The reducer is connected to a first motor and is fixed to the body of the screw feeder. The top of the body has multiple feed inlets, and each feed inlet has a hopper above it. The hopper communicates with the interior of the body. A stirring mechanism is installed inside the hopper.
[0009] A sedimentation basin is provided below the discharge port of the screw feeder, and the sedimentation basin is installed on the machine body; after the sedimentation basin is full, the material in the sedimentation basin is lifted by the overhead crane above the sedimentation basin and transferred to the incineration tank.
[0010] The incineration vessel includes a vessel body, with a feed pipe at the top of the vessel body 81 and the bottom end of the feed pipe extending into the interior of the vessel body. A discharge pipe is provided on the outer wall of the bottom surface of the vessel body and is connected to the interior of the vessel body.
[0011] Furthermore, the stirring mechanism includes a second motor, a first rotating rod, and a stirring frame. The bottom of the second motor is bolted to the top of the hopper, and the output end of the second motor passes through the surface of the hopper via a bearing and is bolted to the first rotating rod. A stirring frame is bolted to the upper part of the first rotating rod.
[0012] Furthermore, the stirring rack includes a horizontal bar and four vertical bars. The four vertical bars are symmetrically arranged on both sides of the first rotating rod with the first rotating rod as the axis of symmetry. The center of the horizontal bar is connected to the upper part of the first rotating rod.
[0013] Furthermore, a vertical bar is provided at each end of the crossbar of the stirring rack.
[0014] Furthermore, a third motor is bolted to the lower right side of the hopper. The output end of the third motor passes through the hopper via a bearing and is bolted to a second rotating rod. The other end of the second rotating rod is rotatably connected to the inner wall of the hopper via a bearing.
[0015] Furthermore, multiple feed plates are evenly wound around the surface of the second rotating rod.
[0016] Furthermore, the upper part of the hopper is cylindrical, the middle part is frustoconical, and the lower part is cylindrical, and the length of the vertical rod of the stirring frame is adjusted according to the inclination angle of the frustoconical shape of the hopper.
[0017] Furthermore, the tank is equipped with an auger conveyor mechanism, one end of which is connected to a drive motor, which is fixed to the outer wall of the tank.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] This invention provides a rare earth oxalic acid precipitation and calcination system. Due to the limited capacity of the filtration tank, the output of one reactor corresponds to multiple filtration tanks. The screw feeder of this invention is equipped with multiple hoppers, which can simultaneously process oxalic acid precipitates from multiple filtration tanks, thus improving production efficiency. At the same time, it eliminates the need for manual material digging. In view of the characteristics of oxalic acid precipitates being moist and prone to sticking to the walls, the hopper of this screw feeder is equipped with a stirring mechanism to mix the oxalic acid precipitates more evenly, preventing blockage and adhesion. In addition, the auger conveying mechanism in the calcination tank makes the calcination of oxalic acid precipitates more thorough, thereby improving product quality. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of this utility model.
[0021] Figure 2 This is a schematic diagram of the screw feeder of this utility model.
[0022] in:
[0023] 1. Liquid tank, 2. Oxalic acid heat preservation tank, 3. Oxalic acid dissolving kettle, 4. Organic solvent reaction kettle, 5. Filter box, 6. Screw feeder, 61. Machine base, 62. First motor, 63. Reducer, 64. Screw, 65. Feed hopper, 66. Stirring mechanism, 66. Second motor, 661. First rotating rod, 662. Stirring frame, 663. Third motor, 67. Second rotating rod, 68. Feed plate, 69. Sediment bowl, 7. Incineration tank, 81. Tank body, 82. Feed pipe, 83. Discharge pipe, 9. Crane. Detailed Implementation
[0024] To better understand the technical solution of this utility model, a detailed description will be provided below in conjunction with relevant illustrations. It should be understood that the specific embodiments described below are not intended to limit the specific implementation of the technical solution of this utility model, but are merely possible implementations of the technical solution of this utility model. It should be noted that the descriptions of the positional relationships of the components herein, such as component A being located above component B, are based on the relative positions of the components in the illustrations and are not intended to limit the actual positional relationships of the components. Example 1
[0025] See Figures 1-2 , Figure 1A schematic diagram of the structure of this utility model has been drawn. As shown in the figure, this utility model relates to a rare earth oxalic acid precipitation and calcination system, which includes multiple liquid tanks 1, oxalic acid heat preservation tanks 2, oxalic acid dissolving kettles 3, organic solvent reaction kettles 4, multiple suction filter boxes 5, a screw feeder 6, a precipitation material bowl 7, and a calcination tank 8. The liquid tanks 1 and oxalic acid heat preservation tanks 2 are respectively connected to the inlet of the oxalic acid dissolving kettle 3, and the outlet of the oxalic acid dissolving kettle 3 is connected to the organic solvent reaction kettle 4. Organic solvent is added to the organic solvent reaction kettle 4. The acid-dissolved rare earth solution comes into contact with a specific organic solvent, and the rare earth elements undergo a complexation reaction with the organic solvent, forming a complex with specific solubility and stability in the organic solvent reaction kettle 4. A traveling crane 9 is provided above the suction filter boxes 5 and the precipitation material bowls 7.
[0026] The outlet of the organic solvent reactor 4 is connected to the filtration box 5, where precipitation takes place. One organic solvent reactor 4 corresponds to two to three filtration boxes 5. The filtration box 5 is equipped with a filter screen to filter out the liquid. Oxalic acid precipitate is formed in the filter screen. A crane 9 is provided above the filtration box 5. The crane 9 lifts the filter screen containing the oxalic acid precipitate in the filtration box 5 to the screw feeder 6, and feeds the oxalic acid precipitate into the screw feeder 6.
[0027] The screw feeder 6 includes a base 61 and a body mounted on the base 61. A screw 64 is installed inside the body, with one end of the screw 64 extending out of the body and connected to a reducer 63. The reducer 63 is connected to a first motor 62 and is fixed to the body of the screw feeder 6. The top of the body has three feed inlets, and each feed inlet has a hopper 65 above it. The hopper 65 communicates with the interior of the body.
[0028] The hopper 65 is equipped with a stirring mechanism 66, which includes a second motor 661, a first rotating rod 662, and a stirring frame 663. The bottom of the second motor 661 is bolted to the top of the hopper 65. The output end of the second motor 661 passes through the surface of the hopper 65 through a bearing and is bolted to the first rotating rod 662. A stirring frame 663 is bolted to the upper part of the first rotating rod 662. The stirring frame 663 includes a horizontal bar and four vertical bars. The four vertical bars are symmetrically arranged on both sides of the first rotating rod 662 with the first rotating rod 662 as the axis of symmetry. The center of the horizontal bar is connected to the upper part of the first rotating rod 662, and a vertical bar is provided at each end of the horizontal bar.
[0029] The upper part of the feeding hopper 65 is cylindrical, the middle part is frustoconical, and the lower part is cylindrical. The length of the vertical rod of the stirring frame 663 is adjusted according to the inclination angle of the frustoconical shape of the feeding hopper 65. A third motor 67 is bolted to the lower right side of the feeding hopper 65. The output end of the third motor 67 passes through the feeding hopper 3 through a bearing and is bolted to a second rotating rod 68. The other end of the second rotating rod 68 is rotatably connected to the inner wall of the feeding hopper 3 through a bearing. Four feeding plates 69 are evenly arranged around the surface of the second rotating rod 68.
[0030] A sedimentation basin 7 is provided below the discharge port of the screw feeder 6, and the sedimentation basin 7 is installed on the machine body.
[0031] Once the material in the sedimentation basin 7 is full, it is lifted by the overhead crane 9 above the sedimentation basin 7 and transferred to the incineration tank 8.
[0032] The incineration vessel 8 includes a vessel body 81. A feed pipe 82 is provided at the top of the vessel body 81. The bottom end of the feed pipe 14 extends into the interior of the vessel body 81. A discharge pipe 83 is provided on the outer wall of the bottom surface of the vessel body 81. The discharge pipe 83 is connected to the interior of the vessel body 81. An electric control valve discharge pipe is provided on one side of the outer wall of the discharge pipe 83.
[0033] The tank 81 is equipped with an auger conveyor mechanism. One end of the auger conveyor mechanism is connected to a drive motor, which is fixed to the outer wall of the tank 81. The drive motor is used to stir the rare earth precipitate to prevent it from clumping.
[0034] Working principle:
[0035] This invention provides a rare earth oxalic acid precipitation and calcination system. First, acid dissolution is carried out in an oxalic acid dissolving kettle. After acid dissolution, the solution is introduced into an organic solvent reaction kettle for organic solvent reaction. Then, precipitation is carried out in a suction filter box. After precipitation, the solution is hoisted by a crane into the feeding hopper of a screw feeder.
[0036] The sediment is placed into the hopper, and the second motor is turned on. The second motor rotates, driving the first rotating rod to rotate, which in turn drives the mixing frame to rotate, thus achieving uniform mixing of the material. The mixed material continues to move to the bottom of the hopper, and the first motor is turned on to convey the raw material accumulated at the bottom of the hopper, thereby preventing blockage. By setting up a mixing mechanism, the material is mixed more evenly, resulting in better quality of the finished product. At the same time, the third motor drives the second rotating rod to rotate, which in turn drives the feeding plate to rotate. The feeding plate rotates continuously, constantly conveying the material downwards, thus preventing blockage, ensuring the normal operation of the equipment, and improving production efficiency.
[0037] Finally, the material in the oxalic acid precipitate bowl is hoisted to the incineration tank by a crane. Inside the tank, the material is conveyed by an auger while being incinerated, which makes the incineration more thorough and increases the yield of oxalic acid.
[0038] The above are merely specific application examples of this utility model and do not constitute any limitation on the scope of protection of this utility model. All technical solutions formed by equivalent transformations or equivalent substitutions fall within the scope of protection of this utility model.
Claims
1. A rare earth oxalic acid precipitation and calcination system, characterized in that: It includes a liquid tank (1), an oxalic acid heat preservation tank (2), an oxalic acid dissolving kettle (3), an organic solvent reaction kettle (4), multiple suction filter boxes (5), a screw feeder (6), a precipitate bowl (7), and an incineration tank (8). The liquid tank (1) and the oxalic acid heat preservation tank (2) are respectively connected to the inlet of the oxalic acid dissolving kettle (3), and the outlet of the oxalic acid dissolving kettle (3) is connected to the organic solvent reaction kettle (4). A traveling crane (9) is provided above the suction filter box (5) and the precipitate bowl (7). The outlet of the organic solvent reactor (4) is connected to the filtration box (5) for sedimentation. The filtration box (5) is equipped with a filter screen. The crane (9) lifts the filter screen containing the oxalic acid precipitate in the filtration box (5) to the screw feeder (6) and feeds the oxalic acid precipitate into the screw feeder (6). The screw feeder (6) includes a base (61) and a body mounted on the base (61). A screw (64) is mounted inside the body. One end of the screw (64) extends out of the body and connects to a reducer (63). The reducer (63) is connected to a first motor (62). The reducer (63) is fixed to the body of the screw feeder (6). The top of the body has multiple feed inlets, and each feed inlet has a hopper (65) above it. The hopper (65) communicates with the interior of the body. A stirring mechanism (66) is installed inside the hopper (65). The screw feeder (6) has a sedimentation basin (7) below the discharge port, and the sedimentation basin (7) is set on the machine body; after the sedimentation basin (7) is full, it is lifted by the overhead crane (9) above the sedimentation basin (7) and transferred to the incineration tank (8); The incineration vessel (8) includes a vessel body (81), a feed pipe (82) is provided at the top of the vessel body (81), the bottom end of the feed pipe (82) extends into the interior of the vessel body (81), and a discharge pipe (83) is provided on the outer wall of the bottom surface of the vessel body (81), the discharge pipe (83) is connected to the interior of the vessel body (81).
2. The rare earth oxalic acid precipitation and calcination system according to claim 1, characterized in that: The stirring mechanism (66) includes a second motor (661), a first rotating rod (662), and a stirring frame (663). The bottom of the second motor (661) is bolted to the top of the hopper (65). The output end of the second motor (661) passes through the surface of the hopper (65) through a bearing and is bolted to the first rotating rod (662). A stirring frame (663) is bolted to the upper part of the first rotating rod (662).
3. The rare earth oxalic acid precipitation and calcination system according to claim 2, characterized in that: The stirring rack (663) includes a horizontal bar and four vertical bars. The four vertical bars are symmetrically arranged on both sides of the first rotating rod (662) with the first rotating rod (662) as the axis of symmetry. The center of the horizontal bar is connected to the upper part of the first rotating rod (662).
4. The rare earth oxalic acid precipitation and calcination system according to claim 3, characterized in that: The stirring rack (663) has a vertical bar at each end of the horizontal bar.
5. The rare earth oxalic acid precipitation and calcination system according to claim 1, characterized in that: A third motor (67) is bolted to the lower right side of the hopper (65). The output end of the third motor (67) passes through the hopper (65) through a bearing and is bolted to a second rotating rod (68). The other end of the second rotating rod (68) is rotatably connected to the inner wall of the hopper (65) through a bearing.
6. The rare earth oxalic acid precipitation and calcination system according to claim 5, characterized in that: The surface of the second rotating rod (68) is uniformly surrounded by multiple feeding plates (69).
7. The rare earth oxalic acid precipitation and calcination system according to claim 3, characterized in that: The upper part of the feeding hopper (65) is cylindrical, the middle part is frustoconical, and the lower part is cylindrical. The length of the vertical rod of the stirring rack (663) is adjusted according to the frustoconical tilt angle of the feeding hopper (65).
8. The rare earth oxalic acid precipitation and calcination system according to claim 1, characterized in that: The tank (81) is equipped with an auger conveyor mechanism, one end of which is connected to a drive motor, which is fixed to the outer wall of the tank (81).