Graphite horizontal continuous reaction device for rare earth ore sulfuric acid slurrying decomposition

Abstract

The utility model discloses a graphite horizontal continuous reaction device for rare earth ore sulfuric acid slurrying decomposition, which comprises a graphite multi-stage chamber horizontal reaction kettle, a plurality of first partition plates and a plurality of second partition plates are mounted on the inner bottom wall of the graphite multi-stage chamber horizontal reaction kettle at intervals, and the first partition plates and the second partition plates are arranged in a staggered manner; an inner cavity of the graphite multistage chamber horizontal reaction kettle is divided into a plurality of chambers by the plurality of first partition plates and the plurality of second partition plates; a lower opening is formed in the bottom of the first partition; an upper opening is formed in the top of the second partition; a stirring assembly is mounted in each of the plurality of chambers; a jacket heating assembly is mounted on the outer wall of the graphite multistage chamber horizontal reaction kettle; a rare earth ore feeding hole and a sulfuric acid feeding hole are formed in one side of the top surface of the graphite multistage chamber horizontal reaction kettle. The device can realize uniform mixing decomposition and continuous feeding and discharging of rare earth minerals and sulfuric acid, and has the characteristics of high heating efficiency, good slurry uniformity and continuous and stable feeding and discharging.

Description

Technical Field

[0001] The utility model relates to the technical field of wet smelting of rare earth minerals, in particular to a horizontal continuous graphite reaction device for sulfuric acid slurry decomposition of rare earth minerals. Background Art

[0002] The Bayan Obo mixed rare earth concentrate is composed of bastnaesite and monazite. Currently, the main industrialized rare earth concentrate decomposition technologies are concentrated sulfuric acid high-temperature roasting decomposition and concentrated alkaline solution atmospheric pressure decomposition. However, neither the high-temperature acid process nor the alkaline process can achieve the comprehensive utilization of the rare earths, fluorine, and phosphorus in the mineral.

[0003] To achieve comprehensive utilization of the valuable elements in mixed rare earth minerals, Chinese Patent Publication No. CN109022838A discloses a method for processing fluorine-containing rare earth mineral particles. The fluorine-containing rare earth mineral particles are mixed with a sulfuric acid solution in a specific proportion, then heated and insulated for a liquid-solid reaction. The exhaust gas is condensed and absorbed in an exhaust gas treatment system to produce a fluorosilicic acid product. This method achieves rapid decomposition of the fluorine-containing rare earth mineral particles, easily controls the reaction, and allows for the recycling of residual acid resources. However, issues remain unresolved, such as material heating, continuous loading and unloading, and corrosion and wear resistance of the equipment.

[0004] Therefore, a graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a horizontal continuous graphite reaction device for sulfuric acid slurry decomposition of rare earth ores, aiming to solve or improve at least one of the above technical problems.

[0006] To achieve the above-mentioned object, the present invention provides the following solution: The present invention provides a graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores, comprising a graphite multi-stage chamber horizontal reactor, wherein a plurality of first partitions and a plurality of second partitions are installed on the inner bottom wall of the graphite multi-stage chamber horizontal reactor at intervals, and the first partitions and the second partitions are arranged in a staggered manner; the plurality of first partitions and the plurality of second partitions divide the inner cavity of the graphite multi-stage chamber horizontal reactor into a plurality of chambers;

[0007] The bottom of the first partition is provided with a lower opening, and the top of the second partition is provided with an upper opening;

[0008] A stirring assembly is installed in each of the chambers, and a jacket heating assembly is installed on the outer wall of the graphite multi-stage chamber horizontal reactor;

[0009] The graphite multi-stage chamber horizontal reactor has a rare earth ore feed port and a sulfuric acid feed port on one side of the top surface, and an exhaust gas outlet and a slurry overflow port on the other side of the top surface;

[0010] A feed baffle is installed on one side of the inner top wall of the graphite multi-stage chamber horizontal reactor, and the rare earth ore feed port and the sulfuric acid feed port are both facing the feed baffle.

[0011] According to a graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores provided by the utility model, the jacket heating assembly includes a jacket body fixedly mounted on the outer wall of the graphite multi-stage chamber horizontal reactor, a heating medium inlet is provided at the top of the side wall of the jacket body, and a heating medium outlet is provided at the bottom of the jacket body, and both the heating medium inlet and the heating medium outlet are connected to the inner cavity of the jacket body.

[0012] According to a graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores provided by the utility model, the stirring assembly includes a drive motor and a stirring paddle, the drive motor is installed on the top surface of the graphite multi-stage chamber horizontal reactor, the stirring paddle is rotatably connected in the inner cavity of the graphite multi-stage chamber horizontal reactor, and the stirring paddle is installed on the output shaft of the drive motor through a coupling; a plurality of the stirring paddles are respectively located in a plurality of the chambers.

[0013] According to the utility model, a graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores is provided. A control system is installed on the outer wall of the graphite multi-stage chamber horizontal reactor, and several of the drive motors are electrically connected to the control system.

[0014] According to the graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores provided by the utility model, the number of the chambers is not less than six, and the number of the chambers is an even number.

[0015] According to the graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores provided by the utility model, the number of the first partitions is one more than the number of the second partitions.

[0016] According to a graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores provided by the utility model, the graphite multi-stage chamber horizontal reactor is a cylindrical structure, the shapes of the first partition plate and the second partition plate are adapted to the shape of the inner wall of the graphite multi-stage chamber horizontal reactor, and a gap is provided between the top of the first partition plate and the top of the second partition plate and the top of the inner wall of the graphite multi-stage chamber horizontal reactor.

[0017] The utility model discloses the following technical effects:

[0018] The utility model installs a plurality of first partitions and a plurality of second partitions in a graphite multi-stage chamber horizontal reactor to divide the inner cavity into a plurality of chambers. By changing the opening positions of the first partitions and the second partitions, the slurry can flow continuously in the plurality of chambers, thereby reducing short circuits and improving reaction efficiency and product quality. The slurry processing capacity can be increased by increasing the number of chambers, and the uniform mixing and decomposition of rare earth minerals and sulfuric acid and continuous feeding and discharging of materials can be achieved.

[0019] The utility model ensures uniform distribution and efficient transfer of temperature in the reaction system through the jacket heating component, has high heating efficiency, effectively avoids the problem of decreased reaction efficiency caused by local overheating or uneven temperature, and improves the stability and efficiency of the overall process;

[0020] The utility model can achieve preliminary mixing of the ore powder material added through the rare earth ore feed port and the sulfuric acid added through the sulfuric acid feed port through the feed baffle, thereby preventing the ore powder particles from being entrained by the tail gas to generate dust; the graphite multi-stage chamber horizontal reactor of the utility model has good corrosion resistance and wear resistance, and there is no need to worry about corrosion and wear of high-temperature mixed acid slurry; the device of the utility model as a whole has the characteristics of high heating efficiency, good slurry uniformity, and continuous and stable material feeding and discharging, and can be used for the decomposition of rare earth minerals under high temperature and mixed acid (sulfuric acid, hydrofluoric acid, phosphoric acid) systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural diagram of the utility model;

[0023] Figure 2 This is a schematic structural diagram of the first partition in the present utility model;

[0024] Figure 3 This is a schematic structural diagram of the second partition in the present invention.

[0025] Among them, 1. rare earth ore feed port; 2. sulfuric acid feed port; 3. heating medium inlet; 4. feed baffle; 5. jacket body; 6. stirring paddle; 7. first partition; 8. tail gas outlet; 9. slurry overflow port; 10. heating medium outlet; 11. lower opening; 12. upper opening. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0028] Reference Figure 1-Figure 3 The utility model provides a graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores, comprising a graphite multi-stage chamber horizontal reactor, wherein a plurality of first partitions 7 and a plurality of second partitions are installed on the inner bottom wall of the graphite multi-stage chamber horizontal reactor, and the first partitions 7 and the second partitions are arranged alternately; the plurality of first partitions 7 and the plurality of second partitions divide the inner cavity of the graphite multi-stage chamber horizontal reactor into a plurality of chambers;

[0029] A lower opening 11 is formed at the bottom of the first partition 7, and an upper opening 12 is formed at the top of the second partition;

[0030] A stirring assembly is installed in each of the chambers, and a jacket heating assembly is installed on the outer wall of the graphite multi-stage chamber horizontal reactor;

[0031] A rare earth ore feed port 1 and a sulfuric acid feed port 2 are provided on one side of the top surface of the graphite multi-stage chamber horizontal reactor, and an exhaust gas outlet 8 and a slurry overflow port 9 are provided on the other side of the top surface;

[0032] A feed baffle 4 is installed on one side of the inner top wall of the graphite multi-stage chamber horizontal reactor, and the rare earth ore feed port 1 and the sulfuric acid feed port 2 are both facing the feed baffle 4;

[0033] In this embodiment, the graphite multi-stage chamber horizontal reactor is made of isostatically pressed graphite material, which has good thermal conductivity, corrosion resistance and wear resistance, and can realize the heating, corrosion resistance and wear resistance functions of the device;

[0034] With such a configuration, the utility model installs a plurality of first partitions 7 and a plurality of second partitions in a graphite multi-stage chamber horizontal reactor to divide its inner cavity into a plurality of chambers. By changing the opening positions of the first partitions 7 and the second partitions, the slurry is continuously flowed in the plurality of chambers, thereby reducing short circuits and improving reaction efficiency and product quality. The slurry processing capacity can be increased by increasing the number of chambers, and the uniform mixing and decomposition of rare earth minerals and sulfuric acid and continuous feeding and discharging of materials can be achieved.

[0035] The utility model ensures uniform distribution and efficient transfer of temperature in the reaction system through the jacket heating component, has high heating efficiency, effectively avoids the problem of decreased reaction efficiency caused by local overheating or uneven temperature, and improves the stability and efficiency of the overall process;

[0036] The utility model can preliminarily mix the ore powder material added through the rare earth ore feed port 1 and the sulfuric acid added through the sulfuric acid feed port 2 through the feed baffle 4, thereby preventing the ore powder particles from being entrained by the tail gas to generate dust; the graphite multi-stage chamber horizontal reactor of the utility model has good corrosion resistance and wear resistance, and there is no need to worry about corrosion and wear of high-temperature mixed acid slurry; the device of the utility model as a whole has the characteristics of high heating efficiency, good slurry uniformity, and continuous and stable material feeding and discharging, and can be used for the decomposition of rare earth minerals under high temperature and mixed acid (sulfuric acid, hydrofluoric acid, phosphoric acid) systems.

[0037] Further optimized, the jacket heating assembly includes a jacket body 5 fixedly mounted on the outer wall of the graphite multi-stage chamber horizontal reactor, a heating medium inlet 3 is provided at the top of the side wall of the jacket body 5, and a heating medium outlet 10 is provided at the bottom of the jacket body 5, and the heating medium inlet 3 and the heating medium outlet 10 are both connected to the inner cavity of the jacket body 5;

[0038] The jacket heating method is adopted, and a heating medium is passed into the jacket body 5. The heating medium is steam or heat-conducting oil, and is indirectly heated through the jacket body 5. The heating medium can heat the material to the required reaction temperature without introducing impurities into the reaction system.

[0039] To further optimize the solution, the stirring assembly includes a drive motor and a stirring paddle 6. The drive motor is installed on the top surface of the graphite multi-stage chamber horizontal reactor. The stirring paddle 6 is rotatably connected to the inner cavity of the graphite multi-stage chamber horizontal reactor. The stirring paddle 6 is installed on the output shaft of the drive motor through a coupling; several stirring paddles 6 are respectively located in several chambers.

[0040] To further optimize the solution, a control system is installed on the outer wall of the graphite multi-stage chamber horizontal reactor, and several drive motors are electrically connected to the control system;

[0041] The control element can be set according to the specific use environment, for example, it can be a single chip microcomputer or controlled by a PLC, ARM (Advanced RISC Machine: high-end reduced instruction set machine), FPGA (Field-Programmable Gate Array: Field Programmable Gate Array) and other methods, which are not specifically limited in this embodiment;

[0042] The control system controls the speed of the driving motor to adjust the stirring rate.

[0043] According to the further optimization scheme, the number of chambers is not less than six, and the number of chambers is an even number. The number of chambers is determined according to the processing volume. The larger the processing volume, the more chamber levels there are.

[0044] In a further optimized solution, the number of the first partitions 7 is one more than the number of the second partitions.

[0045] Further optimization scheme, the graphite multi-stage chamber horizontal reactor has a cylindrical structure, the shapes of the first partition plate 7 and the second partition plate are adapted to the shape of the inner wall of the graphite multi-stage chamber horizontal reactor, and a gap is provided between the top of the first partition plate 7 and the top of the second partition plate and the top of the inner wall of the graphite multi-stage chamber horizontal reactor.

[0046] Directions:

[0047] Add rare earth minerals continuously and evenly from the rare earth mineral feed port 1 at the upper leftmost chamber of the device;

[0048] Sulfuric acid is prepared into a solution of the required concentration and continuously added at a steady flow rate from the sulfuric acid feed port 2;

[0049] The rare earth ore and sulfuric acid are initially mixed and then enter the first chamber of the reactor to form a slurry;

[0050] The slurry flows downward from the upper part of the first chamber and flows into the bottom of the second chamber from the lower opening 11 of the first partition. The slurry then flows upward from the bottom of the second chamber and flows into the upper part of the third chamber from the upper opening 12 of the second partition. The slurry flows to the next chamber in this way until it flows out from the slurry overflow port 9 of the last chamber.

[0051] During the reaction, the stirring paddle 6 is fully opened to mix the materials evenly. The mixed gas of hydrogen fluoride, silicon tetrafluoride, water vapor and sulfuric acid mist generated during the reaction enters the exhaust gas treatment device from the exhaust gas outlet 8.

[0052] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0053] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the implementation methods of the present invention. A person skilled in the art will be able to make other variations or modifications based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A horizontal continuous graphite reactor for sulfuric acid pulping and decomposition of rare earth ores, characterized by: The invention comprises a graphite multi-stage chamber horizontal reactor, wherein a plurality of first partitions (7) and a plurality of second partitions are installed on the inner bottom wall of the graphite multi-stage chamber horizontal reactor at intervals, and the first partitions (7) and the second partitions are arranged in a staggered manner; the plurality of first partitions (7) and the plurality of second partitions divide the inner cavity of the graphite multi-stage chamber horizontal reactor into a plurality of chambers; The bottom of the first partition (7) is provided with a lower opening (11), and the top of the second partition is provided with an upper opening (12); A stirring assembly is installed in each of the chambers, and a jacket heating assembly is installed on the outer wall of the graphite multi-stage chamber horizontal reactor; A rare earth ore feed port (1) and a sulfuric acid feed port (2) are provided on one side of the top surface of the graphite multi-stage chamber horizontal reactor, and an exhaust gas outlet (8) and a slurry overflow port (9) are provided on the other side of the top surface; A feed baffle (4) is installed on one side of the inner top wall of the graphite multi-stage chamber horizontal reactor, and the rare earth ore feed port (1) and the sulfuric acid feed port (2) are both facing the feed baffle (4).

2. The graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores according to claim 1, characterized in that: The jacket heating assembly comprises a jacket body (5) fixedly mounted on the outer wall of the graphite multi-stage chamber horizontal reactor, a heating medium inlet (3) is provided at the top of the side wall of the jacket body (5), and a heating medium outlet (10) is provided at the bottom of the jacket body (5), and both the heating medium inlet (3) and the heating medium outlet (10) are communicated with the inner cavity of the jacket body (5).

3. The graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores according to claim 1, characterized in that: The stirring assembly includes a driving motor and a stirring paddle (6), wherein the driving motor is mounted on the top surface of the graphite multi-stage chamber horizontal reactor, and the stirring paddle (6) is rotatably connected to the inner cavity of the graphite multi-stage chamber horizontal reactor, and the stirring paddle (6) is mounted on the output shaft of the driving motor through a coupling; a plurality of the stirring paddles (6) are respectively located in a plurality of the chambers.

4. The graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores according to claim 3, characterized in that: A control system is installed on the outer wall of the graphite multi-stage chamber horizontal reactor, and the plurality of drive motors are electrically connected to the control system.

5. The graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores according to claim 1, characterized in that: The number of the chambers is not less than six, and the number of the chambers is an even number.

6. The graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores according to claim 1, characterized in that: The number of the first partitions (7) is one more than the number of the second partitions.

7. The graphite horizontal continuous reaction device for sulfuric acid slurry decomposition of rare earth ores according to claim 1, characterized in that: The graphite multi-stage chamber horizontal reactor is a cylindrical structure, the shapes of the first partition (7) and the second partition are both adapted to the shape of the inner wall of the graphite multi-stage chamber horizontal reactor, and a gap is provided between the top of the first partition (7) and the top of the second partition and the top of the inner wall of the graphite multi-stage chamber horizontal reactor.

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