High-yield energy-saving rare earth metal electrolytic furnace

Abstract

The application discloses a high-yield energy-saving rare earth metal electrolytic furnace in the technical field of electrolytic devices, which comprises a furnace body, a water tank and power generation equipment; an electrolytic cavity, a graphite layer and an exhaust layer are arranged in the furnace body; a crucible is arranged at the bottom of the electrolytic cavity; a plurality of exhaust holes are formed in the top of the exhaust layer; a first exhaust port is arranged at the bottom of the exhaust layer; a cover body is detachably connected to the top of the furnace body; an anode and a cathode are arranged at the lower end of the cover body; a pneumatic device is fixedly connected to the top of the cover body; an output shaft of the pneumatic device extends into the electrolytic cavity through the cover body; a stirring shaft is fixedly connected to the output shaft of the pneumatic device; and the anode and the cathode are arranged on the two sides of the stirring shaft; a heating plate is arranged in the water tank; a water vapor discharge port and a second exhaust port are arranged at the top of the water tank; an air inlet pipe of the power generation equipment is communicated with the second exhaust port through a third pipeline; and the power generation equipment is communicated with waste gas purification equipment through a seventh pipeline. The technical scheme of the application effectively reduces the power consumption, reduces the emission of polluted waste gas and achieves the purpose of energy saving and emission reduction.

Description

Technical Field

[0001] This invention belongs to the field of electrolysis equipment technology, specifically a high-yield and energy-saving rare earth metal electrolysis furnace. Background Technology

[0002] Rare earth metals are mainly prepared using molten salt electrolysis and metallothermic reduction methods. Different preparation methods are used for rare earth elements depending on their melting and boiling points. Molten salt electrolysis is the primary industrial method for producing mixed rare earth metals and single light rare earth metals such as lanthanum, cerium, praseodymium, and neodymium. It features large-scale production, no need for reducing agents, continuous production capability, and relative economy and convenience. Therefore, molten salt electrolysis plays a crucial role in rare earth metal production and has a wide range of applications. Because high temperatures are required for effective electrolysis of rare metals, an insulation layer needs to be added to the electrolytic furnace to reduce heat loss and promote rare metal electrolysis. However, the insulation layer and graphite layer of traditional electrolytic furnaces have a short lifespan and require frequent replacement.

[0003] To address the aforementioned issues, Chinese patent CN104328458A discloses a high-yield, energy-saving rare earth metal electrolytic furnace, comprising a cylindrical outer steel sleeve and an inner steel sleeve. The inner steel sleeve is inserted into the outer steel sleeve, and the gap between the outer wall of the inner steel sleeve and the inner wall of the outer steel sleeve is filled with a packing layer. A graphite tank is provided inside the inner steel sleeve, and the interior of the graphite tank has a accommodating space for containing electrolyte. A crucible for collecting the rare earth metal generated by electrolysis is provided at the bottom of the accommodating space. A furnace cover plate is provided at the upper end of the outer steel sleeve, and a circular furnace opening corresponding to the opening of the graphite tank is provided in the middle of the furnace cover plate. Four graphite anodes extending into the graphite tank are fixed inside the circular furnace opening. The four graphite anodes form a hollow column structure, and an electrolytic cathode is provided in the center of each graphite anode.

[0004] The technical solution of the above invention effectively solves the problem of short lifespan of electrolytic furnace materials requiring periodic replacement. However, during the electrolysis process, heat energy is naturally dissipated, cooling water is not rationally utilized or collected, and electrolysis waste gas is directly emitted. The energy and resources generated during electrolysis are not rationally utilized, and the waste gas generated is not rationally emitted, which is not conducive to energy conservation and emission reduction. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide a high-yield and energy-saving rare earth metal electrolytic furnace that rationally utilizes the energy and resources generated during electrolysis, reduces electricity consumption, and minimizes environmental pollution from waste gas, thereby achieving the goals of energy conservation and emission reduction.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A high-yield and energy-saving rare earth metal electrolytic furnace includes a furnace body, a water tank, and a power generation device;

[0008] The furnace body is arranged from the inside out as follows: an electrolysis chamber, a graphite layer, a vacuum layer, an exhaust layer, and a water-cooling layer. A crucible is placed at the bottom of the electrolysis chamber. Several exhaust holes are opened at the top of the exhaust layer, and a first exhaust port is provided at the bottom of the exhaust layer. The first exhaust port extends through the water-cooling layer to the outside of the furnace body. A cover is detachably connected to the top of the furnace body. An anode and a cathode are provided at the lower end of the cover. An annular groove is provided at the lower end of the cover, which connects the electrolysis chamber and the exhaust layer. A pneumatic device is fixedly connected to the top of the cover. The output shaft of the pneumatic device extends through the cover into the electrolysis chamber. A stirring shaft is fixedly connected to the output shaft of the pneumatic device. The anode and cathode are located on both sides of the stirring shaft.

[0009] The water tank is equipped with a heating plate, which is composed of several metal tubes. The top of the water tank is equipped with a water vapor discharge port and a second exhaust port. The water vapor discharge port is connected to the air inlet of the pneumatic device through a second pipe. One end of the metal tube is connected to the first pipe, and the other end of the metal tube is connected to the second exhaust port.

[0010] The air intake pipe of the power generation equipment is connected to the second exhaust port through a third pipe.

[0011] The above solution achieved the following beneficial effects:

[0012] When the anode and cathode are energized, electrolysis generates a large amount of heat, which is discharged along with the exhaust gas. The exhaust gas is not discharged directly through the cover, but enters the exhaust layer through the exhaust port and is then transported to the water tank. The exhaust layer covers the entire side wall of the furnace body, which maintains the temperature inside the furnace body. This can increase the heating rate during the heating stage and reduce heat loss during the electrolysis stage. The rare metals produced by electrolysis will accumulate in the crucible for easy removal.

[0013] Hot air entering the water tank passes through several metal pipes, which conduct heat to the water. The resulting steam then enters a pneumatic device through pipes. The pneumatic device's output shaft rotates, driving a stirring shaft. This stirring shaft causes the electrolyte to flow within the electrolysis chamber, ensuring thorough electrolysis of the electrolyte far from the anode and cathode. The exhaust gas from the water tank then enters a power generation unit. This unit utilizes the heat and pressure of the exhaust gas to generate electricity, storing the generated heat energy. After further treatment, this energy can power the anode and cathode. The entire process utilizes the energy generated by electrolysis multiple times, rationally utilizing the energy produced to improve electrolysis efficiency while effectively reducing energy consumption.

[0014] Furthermore, an inlet and an outlet are provided at the upper end of the water-cooled layer.

[0015] Beneficial effects: The vacuum layer can reduce heat conduction and heat loss in the electrolysis chamber; by supplying cooling water to the inlet and discharging cooling water from the outlet, the outermost layer of the furnace body is cooled and the outer surface temperature of the furnace body is reduced.

[0016] Furthermore, the pneumatic device is a pneumatic motor, the air inlet of the pneumatic motor is detachably connected to the second pipe, a switch valve is installed on the second pipe, the second pipe is connected to a fourth pipe, the switch valve is located between the connection between the second pipe and the fourth pipe and the air inlet of the pneumatic motor, the exhaust port of the pneumatic motor is connected to the fourth pipe through a fifth pipe, the air inlet pipe of the power generation equipment is also connected to the fourth pipe, and the fifth pipe is detachably connected to the exhaust port of the pneumatic motor.

[0017] Beneficial effects: The air inlet of the pneumatic motor is detachably connected to the second pipe, and the fifth pipe is detachably connected to the exhaust port of the pneumatic motor. After the pipes are detached, it is easy to open the cover. The switch valve can control whether the water vapor generated in the water tank is delivered to the pneumatic motor, so that the pneumatic motor can be turned off when the electrolyte does not need to be stirred. After the switch valve is closed, the water vapor is delivered to the air inlet pipe of the power generation equipment through the fourth pipe for power generation. The exhaust gas after passing through the pneumatic motor will enter the power generation equipment through the fifth pipe and the fourth pipe for power generation, thus reusing the exhaust gas.

[0018] Furthermore, the power generation equipment is a steam turbine generator, and an air booster pump is installed on the fourth pipe. The air booster pump is located between the fifth pipe and the fourth pipe and the steam turbine generator's air intake pipe. The air booster pump is electrically connected to the steam turbine generator's output box.

[0019] Beneficial effects: Steam turbine generators can efficiently generate electricity using the hot exhaust gas produced by electrolysis. The electricity generated by the steam turbine generator powers the booster pump, increasing the rotational speed of the pneumatic motor and simultaneously increasing the pressure of the hot exhaust gas entering the steam turbine generator. This allows for more thorough mixing of the electrolyte, resulting in better power generation from the steam turbine generator.

[0020] Furthermore, the graphite layers on both sides of the crucible are inverted conical in shape, and the crucible is placed at the bottom of the inclined surface of the conical graphite layer system.

[0021] Beneficial effects: As much of the rare metals produced by electrolysis as possible can fall into the crucible, reducing the chance of rare metals remaining in the electrolysis chamber.

[0022] Furthermore, the metal tubes are copper tubes, and several copper tubes are arranged horizontally and vertically and are interconnected.

[0023] Beneficial effects: Copper has a high thermal conductivity, which can effectively transfer the heat energy in the waste gas from electrolysis to the water. The cross-sectional and cross-sectional arrangement of several copper pipes can increase the contact area between the copper pipes and the water, resulting in better heating of the water.

[0024] Furthermore, it also includes waste gas purification equipment and waste gas incineration equipment. The waste gas purification equipment is connected to the waste gas incineration equipment through a seventh pipeline. The waste gas incineration equipment is an electrically heated RCO catalytic combustion equipment, which is electrically connected to the turbine generator output box.

[0025] Beneficial effects: The waste gas generated by electrolysis has a significant impact on the environment. The waste gas is initially purified by purification equipment and then further purified by waste gas incineration equipment, which reduces environmental pollution. The waste gas incineration equipment can use the electricity generated by the steam turbine generator for incineration, which saves energy and reduces environmental pollution, thus achieving the goal of energy conservation and emission reduction.

[0026] Furthermore, the exhaust gas purification equipment is equipped with a partition plate, which divides the interior of the exhaust gas purification equipment into a spray chamber and a filter chamber.

[0027] The spray chamber is connected to the exhaust pipe of the steam turbine generator through the sixth pipe. A through hole is provided at the lower end of the partition plate, which connects the spray chamber and the filter chamber. A wastewater discharge port is provided at the bottom of the spray chamber.

[0028] The filter chamber is connected to the seventh pipe, and several activated carbon plates are detachably connected to the inner wall of the filter chamber.

[0029] Beneficial effects: Spraying can adsorb most of the solid particulate matter in the waste gas into the water. After the waste gas containing a small amount of solid particulate matter passes through multiple layers of activated carbon plates, the remaining solid particulate matter will be adsorbed onto the activated carbon. The solid particulate matter in the waste gas after passing through the waste gas purification equipment will be greatly reduced, and the waste gas will be initially purified.

[0030] Furthermore, the spray chamber is connected to the drain outlet through the eighth pipe, and the sixth pipe extends into the spray chamber. The end of the pipe in the spray chamber is detachably connected to a spraying device.

[0031] Beneficial effects: Using the cooling water used to cool the furnace body to spray the exhaust gas can purify the exhaust gas, reuse water resources, and reduce water waste. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of Embodiment 1 of the high-yield and energy-saving rare earth metal electrolytic furnace of the present invention;

[0033] Figure 2 This is a schematic diagram of Embodiment 2 of the high-yield and energy-saving rare earth metal electrolytic furnace of the present invention;

[0034] Figure 3 This is a schematic diagram of the furnace body of an embodiment of the high-yield and energy-saving rare earth metal electrolytic furnace of the present invention;

[0035] Figure 4 This is a schematic diagram of the water tank in an embodiment of the high-yield and energy-saving rare earth metal electrolytic furnace of the present invention;

[0036] Figure 5 This is a schematic diagram of the waste gas purification equipment of an embodiment of the high-yield and energy-saving rare earth metal electrolytic furnace of the present invention. Detailed Implementation

[0037] The following detailed description illustrates the specific implementation method:

[0038] The reference numerals in the accompanying drawings include: furnace body 1, first pipe 2, water tank 3, third pipe 4, steam turbine generator 5, fourth pipe 6, air booster pump 7, switch valve 8, fifth pipe 9, second pipe 10, eighth pipe 11, exhaust gas purification equipment 12, seventh pipe 13, exhaust gas incineration equipment 14, sixth pipe 15, pneumatic motor 101, annular groove 102, water inlet 103, water cooling layer 104, exhaust layer 105, vacuum layer 106, graphite layer 107, crucible 108, anode 109, stirring shaft 110, cathode 111, electrolysis chamber 112, drain outlet 113, exhaust hole 114, cover 115, heating plate 301, copper pipe 302, spray chamber 1201, filter chamber 1202, wastewater discharge outlet 1203, spraying equipment 1204, partition plate 1205, activated carbon plate 1206.

[0039] Example 1:

[0040] As attached Figure 1 , Figure 3 and Figure 4 As shown: A high-yield and energy-saving rare earth metal electrolytic furnace includes a furnace body 1, a water tank 3, and a steam turbine generator 5;

[0041] The furnace body 1 is provided with an electrolysis chamber 112, a graphite layer 107, a vacuum layer 106, an exhaust layer 105, and a water-cooling layer 104 arranged from the inside to the outside. A crucible 108 is detachably connected to the bottom of the electrolysis chamber 112. The graphite layers 107 on both sides of the crucible 108 are inverted conical in shape. The crucible 108 is placed at the bottom of the conical inclined surface of the graphite layer 107. Several exhaust holes 114 are opened at the top of the exhaust layer 105. A first exhaust port is opened at the bottom right side of the exhaust layer 105. The first exhaust port extends through the water-cooling layer 104 to the outside of the furnace body 1. A water inlet 103 and a drain 113 are respectively opened on both sides of the top of the water-cooling layer 104. The top of the furnace body 1 is threadedly connected to a cover 115. An anode 109 and a cathode 111 are fixedly connected to the lower end of the cover 115. An annular groove 102 is provided at the lower end of the cover 115, which connects the electrolysis chamber 112 to the exhaust layer 105. A pneumatic motor 101 is fixedly connected to the top of the cover 115. The output shaft of the pneumatic motor 101 extends through the cover 115 into the electrolysis chamber 112. A stirring shaft 110 is coaxially fixedly connected to the output shaft of the pneumatic motor 101. The anode 109 and the cathode 111 are located on both sides of the stirring shaft 110.

[0042] A heating plate 301 is installed inside the water tank 3. The heating plate 301 consists of two vertical copper pipes 302 and four horizontal copper pipes 302. All copper pipes 302 are interconnected. The left vertical pipe is connected to the first exhaust port through the first pipe 2. The upper end of the right vertical pipe is connected to the second exhaust port. A water vapor discharge port is installed at the top of the water tank 3. The water vapor discharge port is connected to the air inlet of the pneumatic motor 101 through the second pipe 10. The air inlet of the pneumatic motor 101 is detachably connected to the second pipe 10. A switch valve 8 is installed on the second pipe 10.

[0043] The second exhaust port is connected to the intake pipe of the steam turbine generator 5 through the third pipe 4. The intake pipe of the steam turbine generator 5 is connected to the second pipe 10 through the fourth pipe 6. The exhaust port of the pneumatic motor 101 is connected to the fourth pipe 6 through the fifth pipe 9. The fifth pipe 9 is detachably connected to the exhaust port of the pneumatic motor 101. An air booster pump 7 is installed on the fourth pipe 6. The connection point between the fourth pipe 6 and the second pipe 10 is located between the water vapor exhaust port and the switch valve 8. The air booster pump 7 is located between the connection point between the fifth pipe 9 and the fourth pipe 6 and the intake pipe of the steam turbine generator 5. The air booster pump 7 is electrically connected to the power output box of the steam turbine generator 5.

[0044] The specific implementation process is as follows:

[0045] First, add rare metal electrolyte to the electrolysis chamber 112, cover it with the cover 115, connect the second pipe 10 to the air inlet of the pneumatic motor 101, and connect the fifth pipe 9 to the exhaust port of the pneumatic motor 101; when the anode 109 and cathode 111 are energized, the cations in the electrolyte move to the cathode 111, absorb electrons, undergo a reduction reaction, and generate new substances; the anions in the electrolyte move to the anode 109, release electrons, undergo an oxidation reaction, and generate rare metal substances; in the early stage of electrolysis, the temperature in the furnace body 1 will continue to rise. At this time, the electrolyte does not need to be stirred, so the switch valve 8 is closed first. When the furnace body 1 needs to reach a high temperature to meet the electrolysis conditions, in order to prevent the temperature inside the furnace body 1 from being lost too quickly, the annular groove 102 opened on the cover 115 will transport the hot gas generated during electrolysis to the exhaust layer 105. The exhaust layer 105 is located in the middle layer of the furnace body 1. The hot gas will pass through the side and bottom of the furnace body 1 from top to bottom, thereby reducing the loss of hot gas. The hot gas is also used to heat or keep the furnace body 1 warm. In order to prevent the temperature of the outer wall of the furnace body 1 from being too high, cooling water can be sent from the water inlet 103 of the water cooling layer 104 and then discharged from the drain outlet 113 to cool the outer wall of the furnace body 1.

[0046] The high-temperature gas inside the furnace body 1 is finally transported to the water tank 3 through the first exhaust pipe. After passing through the copper pipe 302 inside the water tank 3, the hot gas is transported to the steam turbine generator 5 through the second exhaust port. When the hot gas passes through the copper pipe 302, it heats the water in the water tank 3, generating water vapor. When the switch valve 8 is opened, the water vapor is transported to the air inlet of the pneumatic motor 101 through the second pipe 10, and then discharged from the exhaust port of the pneumatic motor 101 and transported to the fourth pipe 6 through the fifth pipe 9. The rotation of the pneumatic motor 101 drives the stirring shaft 110 to rotate, stirring the electrolyte inside the furnace body 1, so that the electrolyte far away from the anode 109 and cathode 111 can be fully electrolyzed. If stirring is not required, simply close the switch valve 8, and the water vapor will directly enter the steam turbine generator 5 through the fourth pipe 6 and the air booster pump 7. The electrolyzed metal will settle in the crucible 108.

[0047] The hot air entering the turbine generator 5 through the third pipe 4 drives the turbine of the turbine generator 5 to rotate and generate electricity. The power is then supplied to the air booster pump 7, which pressurizes the hot air after passing through the pneumatic motor 101 and delivers it into the turbine generator 5 to generate electricity. The excess electricity generated by the turbine generator 5 can be collected, processed, and used to supply power to the anode 109 and cathode 111.

[0048] The entire process utilizes the heat generated by electrolysis itself to heat or maintain the temperature of furnace body 1, improving its insulation effect. Simultaneously, maintaining the high temperature inside furnace body 1 requires a significant amount of electricity, so heat preservation of furnace body 1 also reduces electricity consumption. The steam generated by heating water with hot air drives the pneumatic motor 101 to rotate, ensuring more complete electrolysis of the electrolyte inside furnace body 1. The hot air after passing through water tank 3 and the pneumatic motor 101 is used to generate electricity. The recovered and processed electrical energy can then power the anode 109 and cathode 111, effectively reducing electricity consumption. The entire process fully utilizes the hot air generated during rare metal electrolysis, reusing it multiple times, thus reducing energy consumption and saving energy.

[0049] Example 2:

[0050] The difference from the above embodiments is that, Figure 2 and Figure 5 As shown, it also includes a waste gas purification device 12 and a waste gas incineration device 14; a partition plate is fixedly connected inside the waste gas purification device 12, which divides the interior of the waste gas purification device 12 into a spray chamber 1201 and a filter chamber 1202. The exhaust pipe of the steam turbine generator 5 is connected to the spray chamber 1201 through the sixth pipe 15, and the filter chamber 1202 is connected to the waste gas incineration device 14 through the seventh pipe 13. A through hole is provided at the lower end of the partition plate, which connects the spray chamber 1201 and the filter chamber 1202. A wastewater discharge port 1203 is provided at the bottom of the spray chamber 1201.

[0051] The spray chamber 1201 is connected to the drain outlet 113 via the eighth pipe 11. The sixth pipe 15 extends into the spray chamber 1201, and the end of the pipe inside the spray chamber 1201 is detachably connected to a spraying device 1204. Several activated carbon plates 1206 are detachably connected to the inner wall of the filter chamber 1202. The waste gas incineration device 14 is an electrically heated RCO catalytic incineration device, and the waste gas incineration device 14 is electrically connected to the power output box of the steam turbine generator 5.

[0052] The specific implementation process is as follows:

[0053] The exhaust gas after passing through the steam turbine generator 5 enters the spray chamber 1201 through the sixth pipe 15. The cooling water after cooling the furnace body 1 is transported to the spray chamber 1201 through the eighth pipe 11 and discharged from the spraying device 1204, which can spray the exhaust gas to achieve preliminary purification. The exhaust gas then enters the filter chamber 1202 and passes through several layers of activated carbon plates 1206 for further purification. Finally, the exhaust gas enters the incineration device through the seventh pipe 13, where the electricity generated by the steam turbine generator 5 is used to heat and catalytically incinerate the exhaust gas. Finally, the treated exhaust gas is discharged.

[0054] Environmental pollution can be effectively reduced by treating the exhaust gas from furnace 1 before it is released. By making reasonable use of the energy and resources generated during the electrolysis process of furnace 1 to treat the exhaust gas, the goal of energy conservation and emission reduction in the whole process can be achieved.

[0055] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific structures and / or characteristics in the solutions are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A high-yield, energy-saving rare earth metal electrolytic furnace, characterized in that: Includes the furnace body, water tank, and power generation equipment; The furnace body is arranged from the inside out as follows: an electrolysis chamber, a graphite layer, a vacuum layer, an exhaust layer, and a water-cooling layer. A crucible is placed at the bottom of the electrolysis chamber. Several exhaust holes are opened at the top of the exhaust layer, and a first exhaust port is provided at the bottom of the exhaust layer. The first exhaust port extends through the water-cooling layer to the outside of the furnace body. A cover is detachably connected to the top of the furnace body. An anode and a cathode are provided at the lower end of the cover. An annular groove is provided at the lower end of the cover, which connects the electrolysis chamber and the exhaust layer. A pneumatic device is fixedly connected to the top of the cover. The output shaft of the pneumatic device extends through the cover into the electrolysis chamber. A stirring shaft is fixedly connected to the output shaft of the pneumatic device. The anode and cathode are located on both sides of the stirring shaft. The water tank is equipped with a heating plate, which is composed of several metal tubes. The top of the water tank is equipped with a water vapor discharge port and a second exhaust port. The water vapor discharge port is connected to the air inlet of the pneumatic device through a second pipe. One end of the metal tube is connected to the first pipe, and the other end of the metal tube is connected to the second exhaust port. The air intake pipe of the power generation equipment is connected to the second exhaust port through a third pipe.

2. The high-yield, energy-saving rare earth metal electrolytic furnace according to claim 1, characterized in that: The upper part of the water-cooled layer is equipped with a water inlet and a water outlet.

3. The high-yield, energy-saving rare earth metal electrolytic furnace according to claim 2, characterized in that: The pneumatic device is a pneumatic motor. The air inlet of the pneumatic motor is detachably connected to the second pipe. A switch valve is installed on the second pipe. The second pipe is connected to a fourth pipe. The switch valve is located between the connection between the second and fourth pipes and the air inlet of the pneumatic motor. The exhaust port of the pneumatic motor is connected to the fourth pipe through a fifth pipe. The air inlet pipe of the power generation equipment is also connected to the fourth pipe. The fifth pipe is detachably connected to the exhaust port of the pneumatic motor.

4. The high-yield, energy-saving rare earth metal electrolytic furnace according to claim 3, characterized in that: The power generation equipment is a steam turbine generator. An air booster pump is installed on the fourth pipe. The air booster pump is located between the fifth pipe and the fourth pipe and the steam turbine generator's air intake pipe. The air booster pump is electrically connected to the steam turbine generator's output box.

5. The high-yield, energy-saving rare earth metal electrolytic furnace according to claim 4, characterized in that: The graphite layers on both sides of the crucible are inverted cone shape, and the crucible is placed at the bottom of the inclined surface of the graphite layer cone system.

6. The high-yield, energy-saving rare earth metal electrolytic furnace according to claim 5, characterized in that: The metal pipes are copper pipes, and several copper pipes are arranged horizontally and vertically and are interconnected.

7. The high-yield, energy-saving rare earth metal electrolytic furnace according to claim 6, characterized in that: It also includes waste gas purification equipment and waste gas incineration equipment. The waste gas purification equipment is connected to the waste gas incineration equipment through the seventh pipeline. The waste gas incineration equipment is an electrically heated RCO catalytic combustion equipment, which is electrically connected to the turbine generator output box.

8. The high-yield, energy-saving rare earth metal electrolytic furnace according to claim 7, characterized in that: The exhaust gas purification equipment is equipped with a partition plate, which divides the interior of the equipment into a spray chamber and a filter chamber. The spray chamber is connected to the exhaust pipe of the steam turbine generator through the sixth pipe. A through hole is provided at the lower end of the partition plate, which connects the spray chamber and the filter chamber. A wastewater discharge port is provided at the bottom of the spray chamber. The filter chamber is connected to the seventh pipe, and several activated carbon plates are detachably connected to the inner wall of the filter chamber.

9. The high-yield, energy-saving rare earth metal electrolytic furnace according to claim 8, characterized in that: The spray chamber is connected to the drain outlet through the eighth pipe, and the sixth pipe extends into the spray chamber. The end of the pipe in the spray chamber is detachably connected to a spraying device.

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