A pretreatment system for rare earth electrolytic raw materials

Abstract

The application discloses a kind of rare earth electrolysis raw materials's pretreatment system, it is related to rare earth field, it solves the technical problem that traditional rare earth electrolysis raw materials's pretreatment process cannot be adapted to raw material state difference automatic adjustment and leads to electrolytic cell voltage fluctuation and product purity instability.The system includes spiral feeder, detection box, first-stage drying box, second-stage drying screening box and storage tank;The feeding port of spiral feeder is placed rare earth electrolysis raw materials, spiral feeder, detection box, first-stage drying box, second-stage drying screening box and storage tank are sequentially connected, first-stage drying box is equipped with first-stage drying assembly, second-stage drying screening box is equipped with vibrating screening assembly and hot air blowing assembly;The real-time moisture content of rare earth electrolysis raw materials is obtained by detection assembly inside detection box, and drying screening strategy is triggered according to real-time moisture content.The application avoids excessive drying, effectively reduces the energy consumption of pretreatment equipment and material loss.

Description

Technical Field

[0001] This invention relates to the field of rare earths, and more specifically, to a pretreatment system for rare earth electrolytic raw materials. Background Technology

[0002] Rare earth oxides, fluoride salts, and other electrolytic raw materials are highly hygroscopic. Their moisture content varies greatly depending on factors such as storage temperature and humidity, exposure time, production batches, and powder particle size and looseness. Traditional pretreatment processes use standardized parameters—manually fixed temperature, air velocity, and drying time—which cannot adapt to differences in material conditions. 1. When the environment is humid and the moisture content of the material is high, the fixed drying parameters are not completely dehydrated. The excessive moisture in the raw materials can easily lead to changes in the conductivity of the molten salt after the raw materials enter the electrolytic cell, triggering hydrolysis side reactions, producing oxygen-containing slag, and reducing the current efficiency and metal purity during rare earth electrolysis. 2. If high parameters are used to dry materials in a dry environment with low moisture content, it will cause powder overheating and agglomeration, fine powder burn-off, and particle size deterioration, ultimately destroying the optimal particle size range and causing energy waste. 3. Manual parameter adjustment has a strong lag and cannot synchronously match batch differences in impurity content and powder looseness, resulting in uneven pretreatment quality of each batch, which directly causes voltage fluctuations in the electrolytic cell and unstable product purity. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a pretreatment system for rare earth electrolytic raw materials to address the shortcomings of the prior art. This system solves the technical problem that the traditional pretreatment process for rare earth electrolytic raw materials cannot automatically adjust to the differences in the state of the raw materials, resulting in voltage fluctuations in the electrolytic cell and unstable product purity.

[0004] This invention discloses a pretreatment system for rare earth electrolytic raw materials. The system includes a screw feeder, a detection box, a primary drying box, a secondary drying and screening box, and a storage box. The screw feeder has a feed inlet for rare earth electrolytic raw materials, and its discharge outlet is connected to the detection box via a pipe. The discharge outlet of the detection box is connected to the feed inlet of the primary drying box via a pipe. The discharge outlet of the primary drying box is connected to the feed inlet of the secondary drying and screening box via a pipe. The discharge outlet of the secondary drying and screening box is connected to the feed inlet of the storage box via a pipe. The primary drying box contains a primary drying component, the detection box contains a detection component, and the secondary drying and screening box contains a vibrating screening component and a hot air purging component. The real-time moisture content of rare earth electrolytic raw materials is obtained through the detection component, and the drying and screening strategy is triggered based on the real-time moisture content to control the primary drying component, vibrating screening component and hot air purging component.

[0005] As a further improvement, the drying and screening strategy is as follows: Set an upper limit benchmark value and a lower limit benchmark value for moisture content. Compare the real-time moisture content with the upper limit benchmark value and the lower limit benchmark value respectively. When the real-time moisture content is greater than or equal to the upper limit benchmark value, it indicates that the moisture content of the raw material exceeds the standard and intensive drying measures are taken. When the real-time moisture content is less than or equal to the lower limit benchmark value, it indicates that the moisture content of the raw material is dry and slow-down drying measures are taken. When the real-time moisture content is greater than the lower limit benchmark value and less than the upper limit benchmark value, it indicates that the moisture content of the raw material is suitable and initial drying measures are taken.

[0006] Furthermore, the initial drying measure is as follows: The heating power of the heating rod in the primary drying assembly is set to a preset initial heating power P. 加热棒0 The blowing time of the fan in the hot air blowing assembly is set to a preset initial blowing time T0, and the output power of the fan is set to a preset initial fan output power P. 风机0 The output power of the motor in the vibrating screening assembly is set to a preset initial motor output power P. 电机0 .

[0007] Furthermore, the enhanced drying measures are as follows: Based on the real-time moisture content, the upper limit benchmark value of moisture content, the lower limit benchmark value of moisture content, and the initial heating power P 加热棒0 The first heating power P was calculated. 加热棒1 The heating power of the heating rod is set to a first heating power P. 加热棒1 ; Calculate the first heating power P 加热棒1 The expression is: ; Where W0 is the real-time water content, W H W is the upper limit benchmark value for water content. L Lower limit benchmark value for moisture content; The first purging time T1 is calculated based on the real-time moisture content, the upper limit of moisture content, the lower limit of moisture content, and the initial purging time T0, and the purging time of the blower is set as the first purging time T1. The expression for calculating the first purging time T1 is: ; Based on the real-time moisture content, the upper limit benchmark value of moisture content, the lower limit benchmark value of moisture content, and the initial fan output power P 风机0 The output power P of the first fan was calculated. 风机1The output power of the fan is set to the first fan output power P. 风机1 ; Calculate the output power P of the first fan. 风机1 The expression is: ; Based on the real-time moisture content, the upper limit benchmark value of moisture content, the lower limit benchmark value of moisture content, and the initial motor output power P 电机0 The output power P of the first motor was calculated. 电机1 The output power of the motor is set to the first motor output power P. 电机1 ; Calculate the output power P of the first motor 电机1 The expression is: .

[0008] Furthermore, the measures to slow down the drying process are as follows: Based on the real-time moisture content, the upper limit benchmark value of moisture content, the lower limit benchmark value of moisture content, and the initial heating power P 加热棒0 The second heating power P was calculated. 加热棒2 The heating power of the heating rod is set to the second heating power P. 加热棒2 ; Calculate the second heating power P 加热棒2 The expression is: ; The second purging time T2 is calculated based on the real-time moisture content, the upper limit of moisture content, the lower limit of moisture content, and the initial purging time T0. The purging time of the blower is then set as the second purging time T2. The expression for calculating the second purging time T2 is: ; Based on the real-time moisture content, the upper limit benchmark value of moisture content, the lower limit benchmark value of moisture content, and the initial fan output power P 风机0 The output power P of the second fan was calculated. 风机2 The output power of the fan is set to the output power P of the second fan. 风机2 ; Calculate the output power P of the second fan. 风机2 The expression is: ; Based on the real-time moisture content, the upper limit benchmark value of moisture content, the lower limit benchmark value of moisture content, and the initial motor output power P 电机0 The output power P of the second motor was calculated. 电机2 The output power of the motor is set to the output power P of the second motor.电机2 ; Calculate the output power P of the second motor 电机2 The expression is: .

[0009] Furthermore, the primary drying assembly includes a hot air supply circuit and multiple heating rods. The primary drying chamber has a first cavity, in which a conveying device is provided. A filter plate is fixedly installed in the first cavity, and the conveying device is installed on the filter plate. The hot air supply circuit is installed at the bottom of the first cavity and below the filter plate. The hot air supply circuit has multiple air outlets. Multiple heating rods are installed on the top and side walls of the first cavity. The hot air supply circuit is connected to an external hot air blower. The conveying device, heating rods, and hot air blower are all electrically connected to a controller.

[0010] Furthermore, the vibrating screening assembly includes a screen body, a first screen, a second screen, a fixed base, a conveyor belt, a motor, two first damping components, and two second damping components; The secondary drying and screening box is provided with a second cavity. A fixed base is fixedly installed at the bottom of the second cavity. Two first shock absorbers are fixedly installed on the fixed base. Two second shock absorbers are fixedly installed on the fixed base through fixed blocks. The screen body is fixedly connected to the top of the two first shock absorbers. The screen body is fixedly connected to the top of the two second shock absorbers. A rotating shaft is rotatably installed on one side of the screen body. The bottom of the motor is fixedly installed on the fixed base. The drive end of the motor is connected to the rotating shaft through a conveyor belt. The screen body has a first screen and a second screen in the middle, with the first screen located above the second screen, and the motor is electrically connected to the controller.

[0011] Furthermore, the first screen has a mesh size of 100, and the second screen has a mesh size of 300.

[0012] Furthermore, the hot air purging assembly includes multiple fans, which are respectively fixedly installed on the inner wall of the second cavity, and all of the fans are electrically connected to the controller.

[0013] Furthermore, the detection component is an infrared moisture meter, and the probe of the infrared moisture meter is located inside the detection box.

[0014] Beneficial effects The advantages of this invention are: This invention comprises a screw feeder, a detection box, a primary drying box, a secondary drying and screening box, and a storage box. The detection component acquires the real-time moisture content of the rare earth electrolysis raw materials. Based on this real-time moisture content, a drying and screening strategy is triggered to control the primary drying component, vibrating screening component, and hot air purging component. This eliminates pretreatment parameter deviations caused by batch material and environmental humidity. While controlling moisture, it stabilizes powder particle size distribution, inhibits impurity activation, and simultaneously matches the three major process requirements of purity, particle size, and impurities of the electrolysis raw materials. It avoids human error, thereby stabilizing the conductivity and redox balance of the molten salt system, significantly improving the rare earth electrolysis current efficiency and the purity of the cathode deposition products. Process parameters are matched as needed to avoid over-drying and effectively reduce energy consumption and material loss in the pretreatment equipment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the rare earth electrolytic raw material pretreatment system of the present invention; Figure 2 This is a schematic diagram of the interior of the primary drying chamber of the pretreatment system of the present invention; Figure 3 This is a schematic diagram of the interior of the secondary drying and screening box of the pretreatment system of the present invention; Figure 4 This is a schematic diagram of the vibrating screening component of the pretreatment system of the present invention.

[0016] Among them: 1-Screw feeder, 2-Detection box, 3-First-stage drying box, 4-Second-stage drying and screening box, 5-Storage box, 30-First cavity, 31-Hot air supply circuit, 32-Heating rod, 33-Filter plate, 34-Air outlet, 35-Conveying device, 40-Second cavity, 41-Screen body, 42-First screen, 43-Second screen, 44-Fixed seat, 45-Conveyor belt, 46-Motor, 47-First shock absorber, 48-Second shock absorber, 49-Fan, 50-Fixed block, 51-Rotating shaft. Detailed Implementation

[0017] The present invention will be further described below with reference to embodiments, but this does not constitute any limitation on the present invention. Any limited modifications made by any person within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0018] See Figures 1-4This invention discloses a pretreatment system for rare earth electrolytic raw materials. The system includes a screw feeder 1, a detection box 2, a primary drying box 3, a secondary drying and screening box 4, and a storage box 5. The screw feeder 1 has a feed inlet for rare earth electrolytic raw materials, and its discharge outlet is connected to the detection box 2 via a pipe. The discharge outlet of the detection box 2 is connected to the feed inlet of the primary drying box 3 via a pipe. The discharge outlet of the primary drying box 3 is connected to the feed inlet of the secondary drying and screening box 4 via a pipe. The discharge outlet of the secondary drying and screening box 4 is connected to the feed inlet of the storage box 5 via a pipe. The primary drying box 3 is equipped with a primary drying component, the detection box 2 is equipped with a detection component, and the secondary drying and screening box 4 is equipped with a vibrating screening component and a hot air purging component.

[0019] Material flow: The material is fed through a spiral seal to the detection box 2 for parameter acquisition, then to the primary drying box 3 for dehydration and modification, then to the secondary drying and screening box 4 for vibrating screening and grading, and finally to the pulse blowing to remove impurities and dry. The processed material is then stored in the storage box 5.

[0020] like Figure 2 As shown, the primary drying assembly includes a hot air supply circuit 31 and multiple heating rods 32. The primary drying chamber 3 has a first cavity 30, in which a conveying device 35 is installed. A filter plate 33 is fixedly installed in the first cavity 30, and the filter plate 33 has multiple heat-conducting holes to facilitate the transfer of heat from the hot air supply circuit 31 to the conveying device 5. The conveying device 35 is installed on the filter plate 33. The hot air supply circuit 31 is installed at the bottom of the first cavity 30 and below the filter plate 33. The hot air supply circuit 31 has multiple air outlets 34. Multiple heating rods 32 are installed on the top and side walls of the first cavity 30. The hot air supply circuit 31 is connected to an external hot air blower. The conveying device 35, heating rods 32, and hot air blower are all electrically connected to a controller. This first cavity 30 is responsible for basic constant-temperature dehydration, removing only the free water on the powder surface, and setting a safe reference temperature range to avoid high temperatures directly causing rare earth powder agglomeration, burn-off, oxidation, and deterioration.

[0021] like Figure 3-4 As shown, the vibrating screening assembly includes a screen body 41, a first screen 42, a second screen 43, a fixed base 44, a conveyor belt 45, a motor 46, two first shock absorbers 47 and two second shock absorbers 48.

[0022] The secondary drying and screening box 4 is provided with a second cavity 40. A fixed base 44 is fixedly installed at the bottom of the second cavity 40. Two first shock absorbers 47 are fixedly installed on the fixed base 44. Two second shock absorbers 48 are fixedly installed on the fixed base 44 through a fixed block 50. The screen body 41 is fixedly connected to the top of the two first shock absorbers 47 and the top of the two second shock absorbers 48. A rotating shaft 51 is rotatably installed on one side of the screen body 41. The bottom of the motor 46 is fixedly installed on the fixed base 44. The drive end of the motor 46 is connected to the rotating shaft 51 through a conveyor belt 45.

[0023] A first screen 42 and a second screen 43 are provided in the middle of the screen body 41. The first screen 42 is located above the second screen 43. The motor 46 is electrically connected to the controller.

[0024] The first screen 42 has a mesh count of 100, and the second screen 43 has a mesh count of 300. The first screen 42 is used to precisely trap ultra-coarse particles, and the second screen 43 is used to precisely trap ultra-fine particles.

[0025] The hot air purging assembly includes multiple fans 49, which are fixedly installed on the inner wall of the second chamber 40. All fans 49 are electrically connected to the controller. The fans 49 are used to remove moisture and micro-impurities trapped between powder particles.

[0026] After the agglomerated powder is subjected to high-frequency vibration by a variable frequency vibrating screen, the clustered particles are completely broken up, and the originally closed particle pores are fully opened, exposing the bound water and interlayer moisture trapped inside the powder. At this time, combined with hot air blowing, the hot air can directly penetrate the micropores of the particles and accurately remove the residual moisture inside the powder. Compared with static drying, the dewatering efficiency and uniformity under the dynamic working conditions of screening are greatly improved, which is the core process for removing hidden moisture from powder.

[0027] The detection component is an infrared moisture meter, and the probe of the infrared moisture meter is located inside detection box 2. The infrared moisture meter is a Lankong HM-ZH2 infrared moisture meter.

[0028] The first damping component 47 and the second damping component 48 in this patent are both existing mature technologies, and their structures will not be explained in this patent.

[0029] The real-time moisture content of rare earth electrolytic raw materials is obtained by the detection component, and the drying and screening strategy is triggered based on the real-time moisture content to control the primary drying component, vibrating screening component and hot air purging component.

[0030] The drying and screening strategy involves setting an upper limit and a lower limit benchmark for moisture content, comparing the real-time moisture content with both the upper and lower limit benchmarks, and determining whether the moisture content is suitable for the raw materials when it is greater than the lower limit benchmark but less than the upper limit benchmark.

[0031] The initial drying measure is to set the heating power of the heating rod 32 in the primary drying component to a preset initial heating power P. 加热棒0 Set the blowing time of the fan 49 in the hot air blowing assembly to a preset initial blowing time T0, and set the output power of the fan 49 to a preset initial fan output power P. 风机0 The output power of motor 46 in the vibrating screen assembly is set to the preset initial motor output power P. 电机0 In this embodiment, the initial heating power P 加热棒0 The initial purging time is 2 minutes (T0), and the initial fan output power is 18 kW. 风机0 The initial motor output power P is 3kW. 电机0 The power is 0.8 kW. These parameters were obtained through numerous experiments.

[0032] When the real-time moisture content is greater than or equal to the upper limit benchmark value, it indicates that the moisture content of the raw materials exceeds the standard and intensive drying measures should be taken.

[0033] Strengthening drying measures include, Based on real-time moisture content, upper limit benchmark value of moisture content, lower limit benchmark value of moisture content, and initial heating power P 加热棒0 The first heating power P was calculated. 加热棒1 The heating power of the heating rod 32 is set to the first heating power P. 加热棒1 .

[0034] Calculate the first heating power P 加热棒1 The expression is: ; Where W0 is the real-time water content, W H W is the upper limit benchmark value for water content. L Lower limit benchmark value for moisture content; The first purging time T1 is calculated based on the real-time moisture content, the upper limit of moisture content, the lower limit of moisture content, and the initial purging time T0. The purging time of the blower 49 is then set as the first purging time T1.

[0035] The expression for calculating the first purging time T1 is: ; Based on real-time moisture content, upper limit benchmark value of moisture content, lower limit benchmark value of moisture content, and initial fan output power P风机0 The output power P of the first fan was calculated. 风机1 Set the output power of fan 49 to the first fan output power P. 风机1 .

[0036] Calculate the output power P of the first fan. 风机1 The expression is: ; Based on real-time moisture content, upper limit benchmark value of moisture content, lower limit benchmark value of moisture content, and initial motor output power P 电机0 The output power P of the first motor was calculated. 电机1 Set the output power of motor 46 to the first motor output power P. 电机1 .

[0037] Calculate the output power P of the first motor 电机1 The expression is: .

[0038] When the real-time moisture content is less than or equal to the lower limit benchmark value, it indicates that the moisture content of the raw materials is dry and measures to slow down the drying process are being taken.

[0039] The measures to slow down the drying process are as follows: Based on real-time moisture content, upper limit benchmark value of moisture content, lower limit benchmark value of moisture content, and initial heating power P 加热棒0 The second heating power P was calculated. 加热棒2 The heating power of heating rod 32 is set to the second heating power P. 加热棒2 .

[0040] Calculate the second heating power P 加热棒2 The expression is: ; The second purging time T2 is calculated based on the real-time moisture content, the upper limit of moisture content, the lower limit of moisture content, and the initial purging time T0. The purging time of the blower 49 is then set as the second purging time T2.

[0041] The expression for calculating the second purging time T2 is: ; Based on real-time moisture content, upper limit benchmark value of moisture content, lower limit benchmark value of moisture content, and initial fan output power P 风机0 The output power P of the second fan was calculated. 风机2 Set the output power of fan 49 to the output power P of the second fan. 风机2 .

[0042] Calculate the output power P of the second fan. 风机2 The expression is: ; Based on real-time moisture content, upper limit benchmark value of moisture content, lower limit benchmark value of moisture content, and initial motor output power P 电机0 The output power P of the second motor was calculated. 电机2 Set the output power of motor 46 to the output power P of the second motor. 电机2 .

[0043] Calculate the output power P of the second motor 电机2 The expression is: .

[0044] The entire set of equipment adopts a grading process of "primary constant temperature basic drying + secondary screening adaptive precision drying", and the core design principle is as follows: Rare earth powders are porous and prone to agglomeration. When damp materials fall into the constant-temperature drying chamber, the powders are in a compacted state. At this time, most of the moisture is trapped inside the particle agglomerates, and hot air can only penetrate the surface of the powder. If the primary drying directly increases the temperature and air velocity based on the moisture content, the high temperature will instantly cause the surface powder to overheat and sinter, burning away fine powder and destroying the 100-300 mesh standard particle size. At the same time, the moisture inside the powder still cannot escape, resulting in a false drying phenomenon of dry outside and wet inside, which cannot truly meet the standards. Therefore, the primary constant-temperature drying only performs conservative basic dehydration, removing only surface free water to ensure that the physical properties of the powder are not damaged.

[0045] In the primary drying chamber, the material residence time is short and the material accumulation is large, so fine-tuning of parameters has limited impact on the final moisture content, resulting in low adaptive adjustment accuracy. In contrast, the screening and purging process involves loose materials, a large contact area, and a fast response speed. Using the screening unit as the adaptive control terminal, it is possible to accurately match the differences in moisture content and looseness of different batches of materials, solving the problem of inconsistent drying quality with fixed parameters and achieving refined closed-loop control.

[0046] The above description is only a preferred embodiment of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. A pretreatment system for rare earth electrolytic raw materials, characterized in that, The system includes a screw feeder (1), a testing box (2), a primary drying box (3), a secondary drying and screening box (4), and a storage box (5); the screw feeder (1) has rare earth electrolytic raw materials placed in its inlet, the screw feeder (1) has its outlet connected to the testing box (2) via a pipe, the testing box (2) has its outlet connected to the inlet of the primary drying box (3) via a pipe, the primary drying box (3) has its outlet connected to the inlet of the secondary drying and screening box (4) via a pipe, the secondary drying and screening box (4) has its outlet connected to the inlet of the storage box (5) via a pipe, the primary drying box (3) has a primary drying component inside, the testing box (2) has a testing component inside, and the secondary drying and screening box (4) has a vibrating screening component and a hot air blowing component inside. The real-time moisture content of rare earth electrolytic raw materials is obtained through the detection component, and the drying and screening strategy is triggered based on the real-time moisture content to control the primary drying component, vibrating screening component and hot air purging component.

2. The pretreatment system for rare earth electrolytic raw materials according to claim 1, characterized in that, The drying and screening strategy is as follows: Set upper and lower limits for moisture content benchmarks. Compare the real-time moisture content with the upper and lower limits respectively. When the real-time moisture content is greater than the lower limit and less than the upper limit, it indicates that the moisture content of the raw material is suitable and initial drying measures are taken. When the real-time moisture content is greater than or equal to the upper limit, it indicates that the moisture content of the raw material exceeds the standard and intensive drying measures are taken. When the real-time moisture content is less than or equal to the lower limit, it indicates that the moisture content of the raw material is dry and slow-down drying measures are taken.

3. The pretreatment system for rare earth electrolytic raw materials according to claim 2, characterized in that, The initial drying measures are as follows: The heating power of the heating rod (32) in the primary drying assembly is set to a preset initial heating power P. 加热棒0 The blowing time of the fan (49) in the hot air blowing assembly is set to a preset initial blowing time T0, and the output power of the fan (49) is set to a preset initial fan output power P. 风机0 The output power of the motor (46) in the vibrating screening assembly is set to a preset initial motor output power P. 电机0 .

4. The pretreatment system for rare earth electrolytic raw materials according to claim 3, characterized in that, The enhanced drying measures are as follows: Based on the real-time moisture content, the upper limit benchmark value of moisture content, the lower limit benchmark value of moisture content, and the initial heating power P 加热棒0 The first heating power P was calculated. 加热棒1 The heating power of the heating rod (32) is set to the first heating power P. 加热棒1 ; Calculate the first heating power P 加热棒1 The expression is: ； Where W0 is the real-time water content, W H W is the upper limit benchmark value for water content. L Lower limit benchmark value for moisture content; The first purging time T1 is calculated based on the real-time moisture content, the upper limit of moisture content, the lower limit of moisture content, and the initial purging time T0. The purging time of the blower (49) is set as the first purging time T1. The expression for calculating the first purging time T1 is: ； Based on the real-time moisture content, the upper limit benchmark value of moisture content, the lower limit benchmark value of moisture content, and the initial fan output power P 风机0 The output power P of the first fan was calculated. 风机1 The output power of the fan (49) is set as the first fan output power P. 风机1 ; Calculate the output power P of the first fan. 风机1 The expression is: ； Based on the real-time moisture content, the upper limit benchmark value of moisture content, the lower limit benchmark value of moisture content, and the initial motor output power P 电机0 The output power P of the first motor was calculated. 电机1 The output power of the motor (46) is set to the first motor output power P. 电机1 ; Calculate the output power P of the first motor 电机1 The expression is: 。 5. The pretreatment system for rare earth electrolytic raw materials according to claim 4, characterized in that, The measures to slow down drying are as follows: Based on the real-time moisture content, the upper limit benchmark value of moisture content, the lower limit benchmark value of moisture content, and the initial heating power P 加热棒0 The second heating power P was calculated. 加热棒2 The heating power of the heating rod (32) is set to the second heating power P. 加热棒2 ; Calculate the second heating power P 加热棒2 The expression is: ； The second purging time T2 is calculated based on the real-time moisture content, the upper limit of moisture content, the lower limit of moisture content, and the initial purging time T0. The purging time of the blower (49) is set as the second purging time T2. The expression for calculating the second purging time T2 is: ； Based on the real-time moisture content, the upper limit benchmark value of moisture content, the lower limit benchmark value of moisture content, and the initial fan output power P 风机0 The output power P of the second fan was calculated. 风机2 The output power of the fan (49) is set as the output power P of the second fan. 风机2 ; Calculate the output power P of the second fan. 风机2 The expression is: ； Based on the real-time moisture content, the upper limit benchmark value of moisture content, the lower limit benchmark value of moisture content, and the initial motor output power P 电机0 The output power P of the second motor was calculated. 电机2 The output power of the motor (46) is set to the output power P of the second motor. 电机2 ; Calculate the output power P of the second motor 电机2 The expression is: 。 6. The pretreatment system for rare earth electrolytic raw materials according to claim 1, characterized in that, The primary drying assembly includes a hot air supply circuit (31) and multiple heating rods (32). The primary drying chamber (3) is provided with a first cavity (30). A conveying device (35) is provided in the first cavity (30). A filter plate (33) is fixedly installed in the first cavity (30). The conveying device (35) is installed on the filter plate (33). The hot air supply circuit (31) is installed at the bottom of the first cavity (30) and below the filter plate (33). Multiple air outlets (34) are provided on the hot air supply circuit (31). Multiple heating rods (32) are installed on the top and side walls of the first cavity (30). The hot air supply circuit (31) is connected to an external hot air blower. The conveying device (35), heating rods (32) and hot air blower are all electrically connected to the controller.

7. The pretreatment system for rare earth electrolytic raw materials according to claim 1, characterized in that, The vibrating screening assembly includes a screen body (41), a first screen (42), a second screen (43), a fixed base (44), a conveyor belt (45), a motor (46), two first shock absorbers (47) and two second shock absorbers (48). The secondary drying and screening box (4) is provided with a second cavity (40). A fixed seat (44) is fixedly installed at the bottom of the second cavity (40). Two first shock absorbers (47) are fixedly installed on the fixed seat (44). Two second shock absorbers (48) are fixedly installed on the fixed seat (44) through a fixed block (50). The screen body (41) is fixedly connected to the two first shock absorbers (47). The screen body (41) is fixedly connected to the two second shock absorbers (48). A rotating shaft (51) is rotatably installed on one side of the screen body (41). The bottom of the motor (46) is fixedly installed on the fixed seat (44). The drive end of the motor (46) is connected to the rotating shaft (51) through a conveyor belt (45). The screen body (41) is provided with a first screen (42) and a second screen (43) in the middle, with the first screen (42) located above the second screen (43), and the motor (46) is electrically connected to the controller.

8. The pretreatment system for rare earth electrolytic raw materials according to claim 7, characterized in that, The first screen (42) has a mesh count of 100, and the second screen (43) has a mesh count of 300.

9. The pretreatment system for rare earth electrolytic raw materials according to claim 1, characterized in that, The hot air purging assembly includes multiple fans (49), which are fixedly installed on the inner wall of the second cavity (40) and are electrically connected to the controller.

10. The pretreatment system for rare earth electrolytic raw materials according to claim 1, characterized in that, The detection component is an infrared moisture meter, and the probe of the infrared moisture meter is set inside the detection box (2).

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