An automatic control system and control method for tantalum-niobium metal production

Abstract

The present invention relates to a control method for an automatic control system for the production of tantalum-niobium metals. The control system is designed according to the production process of tantalum-niobium metals, has a high degree of automation, and solves the problems in the production process of tantalum-niobium metals. An automatic cleaning system is provided in the automatic control system of the present invention, which can automatically clean the pipe positions that are prone to blockage to avoid blockage; the present invention arranges an organic liquid storage tank and a stratification detector in the extraction system to recycle the organic liquid used for extraction, thereby improving resource utilization and reducing costs. At the same time, the equipment of the automatic control system is selected according to the process characteristics to ensure that the monitoring data is accurate and reliable, the equipment is not easy to corrode, and has a long service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of tantalum-niobium production, and in particular relates to an automatic control system for tantalum-niobium metal production. Background Art

[0002] Tantalum and niobium have excellent properties such as high melting point, high density, high temperature resistance, corrosion resistance, wear resistance, superconductivity and high strength. They are important metal raw materials that are indispensable in modern cutting-edge electronics, aerospace, medical and military equipment industries. Many niobium and tantalum products have no substitutes. As automated production technology becomes more and more mature, tantalum and niobium metal production lines are also being adjusted towards automation. However, due to the process characteristics of tantalum and niobium production, namely high solid content, high slurry viscosity, easy crystallization, strong corrosiveness, etc., it is easy to cause pipeline blockage, unstable monitoring signals, etc., making it difficult to achieve a high degree of automated production.

[0003] In order to achieve ideal automated production of tantalum and niobium, the automatic control system for tantalum and niobium metal production needs to be designed according to the process characteristics to avoid problems such as adhesion, blockage, corrosion, and inaccurate data. Summary of the invention

[0004] The present invention aims to provide an automatic control system for the production of tantalum-niobium metal, which is designed according to the production process of tantalum-niobium metal, has a high degree of automation, and solves the problems in the production process of tantalum-niobium metal.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] An automatic control system for tantalum-niobium metal production, including a decomposition system, an acid adjustment system, an extraction system, a neutralization system, a central control system, and an automatic cleaning system;

[0007] Each of the decomposition system, acid adjustment system, extraction system and neutralization system comprises a reaction tank and corresponding feed pipes and discharge pipes, the feed pipes and discharge pipes are provided with valves, and each system also comprises a level meter for monitoring the liquid level of the reaction tank;

[0008] The decomposition system is used to complete the decomposition of tantalum-niobium ore. The valve of the feed pipe is controlled to open so as to add sulfuric acid and hydrofluoric acid into the decomposition tank in proportion. After the decomposition of the tantalum-niobium ore is completed, the valve of the discharge pipe is controlled to open, the slurry obtained by decomposition is filtered and then transported to the acid adjustment section.

[0009] The acid adjustment system is used to complete the acid adjustment work, control the feed pipe valve to open to add sulfuric acid and hydrofluoric acid into the decomposition tank in proportion, adjust the acidity of the slurry to the target value, and after completion, control the discharge pipe valve to open to transport the slurry to the extraction section;

[0010] The extraction system includes 2-octanol extraction, pickling agent extraction, anti-niobium agent extraction, and anti-tantalum agent extraction sections in sequence. Corresponding reagents are added in proportion in each extraction section. The organic phase obtained in each extraction section is transported to the next extraction section. Niobium liquid is obtained after extraction with anti-niobium agent. Tantalum liquid is obtained after the remaining organic phase is extracted with anti-tantalum agent. The niobium liquid and tantalum liquid are transported to the neutralization section for neutralization.

[0011] The neutralization system is used to neutralize the niobium liquid and tantalum liquid respectively, adding ammonia water and pure water to the niobium liquid or tantalum liquid in proportion to adjust the slurry to the target pH;

[0012] The decomposition system, acid adjustment system, extraction system and neutralization system are respectively connected to the central control system for communication; the automatic cleaning system is connected to the pipeline for cleaning the pipeline.

[0013] Furthermore, the automatic control system also includes a potassium tantalate fluoate production control system, which includes a reactor and a cooling crystallization tank; both the reactor and the cooling crystallization tank are provided with temperature sensors, and the temperature sensors are connected to the central control system.

[0014] Furthermore, the automatic cleaning system includes a flushing liquid feed pipe, a sewage pipe, a sample liquid extraction pipe, and a concentration meter;

[0015] The feed pipe, the sewage pipe, and the sample liquid extraction pipe are all provided with valves;

[0016] The sample liquid extraction tube is connected to the sampling inlet of the concentration meter; the valves on the flushing liquid feed pipe and the sewage pipe are electrically connected to the concentration meter.

[0017] Furthermore, the liquid level meter is a radar liquid level meter, and the radar liquid level meter includes a shell made of polyvinylidene fluoride.

[0018] Furthermore, the flow meter adopts a dual-frequency excitation electromagnetic flow meter, and the flow meter lining is made of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer material.

[0019] Furthermore, the decomposition system also includes a temperature sensor, the liquid level meter monitors the liquid level of the reaction tank, and sends the liquid level data to the central control system, and the central control system controls the opening and closing of the sulfuric acid and hydrofluoric acid feed valves according to the liquid level control; the temperature sensor monitors the temperature of the reaction tank, and sends the temperature data to the central control system, and the central control system controls the opening and closing of the sulfuric acid and hydrofluoric acid feed valves according to the temperature data;

[0020] The acid conditioning system includes a sulfuric acid feed pipe and a hydrofluoric acid feed pipe, and also includes a temperature sensor, which monitors the temperature of the acid conditioning tank and controls the opening and closing degree of the valve according to the temperature, thereby controlling the feed speed of sulfuric acid and hydrofluoric acid;

[0021] The neutralization system includes a pure water feed pipe, an ammonia water feed pipe, and a liquid feed pipe, and the central control system controls the flow of each feed pipe according to a preset ratio.

[0022] Furthermore, in the decomposition system, when the temperature sensor detects that the temperature in the reaction tank is greater than 90°C, the central control system controls the closing of the sulfuric acid and hydrofluoric acid feed valves; when the temperature is less than 60°C, the central control system controls the opening of the sulfuric acid and hydrofluoric acid feed valves.

[0023] Furthermore, in the acid adjustment system, when the temperature sensor monitors that the temperature of the reaction tank is greater than 90°C, the central control system controls the closing of the sulfuric acid and hydrofluoric acid feed valves; when the temperature is less than 60°C, the central control system controls the opening of the sulfuric acid and hydrofluoric acid feed valves.

[0024] Furthermore, the extraction system also includes an organic liquid storage tank, in which a liquid level stratification detector is arranged, and the liquid level stratification detector is connected to the central control system; a water phase outlet is arranged at the bottom of the storage tank, an organic liquid outlet is arranged at the side, and corresponding valves are arranged on the outlets; after the liquid level stratification detector detects the stratification of liquid in the storage tank, the central control system controls the valve on the water phase outlet to open and discharge the water phase; when the water phase drops to a preset liquid level, the valve on the water phase outlet is controlled to close and the drainage is stopped.

[0025] Furthermore, the extraction system includes a pure water storage tank, which is connected to the reaction tank of the neutralization system through a pure water feed pipe. The pure water storage tank is provided with a temperature sensor and a heating device to heat the pure water in the pure water storage tank; the temperature sensor monitors the water temperature in the pure water storage tank, and the heating device performs heating work according to the water temperature in the pure water storage tank, and controls the water temperature to 70-80°C.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The automatic control system of the present invention is provided with an automatic cleaning system, which can automatically clean the pipe positions that are prone to clogging to avoid clogging; the present invention arranges an organic liquid storage tank and a stratification detector in the extraction system to recycle the organic liquid used for extraction, thereby improving resource utilization and reducing costs.

[0028] The present invention selects the equipment according to the process characteristics, thereby ensuring that the monitoring data is accurate and reliable, the equipment is not prone to corrosion, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A control block diagram for the production of tantalum-niobium metal according to the present invention;

[0030] Figure 2 It is the structural diagram of the sweeping mechanism of the automatic cleaning system;

[0031] Figure 3 This is a diagram of the organic liquid recycling system in the tantalum-niobium extraction process;

[0032] Figure 4 This is the structural diagram of the organic liquid storage tank.

[0033] Explanation of symbols: 1-central control system, 2-decomposition system, 3-acid adjustment system, 4-extraction system, 5-neutralization system, 6-potassium fluorotantalate production control system, 7-automatic cleaning system;

[0034] 41- sec-octanol extraction tank, 42- pickling agent extraction tank, 43- reverse niobium agent extraction tank, 44- reverse tantalum agent extraction tank, 45- organic liquid storage tank, 46- aqueous phase, 47- organic phase, 48- sec-octanol stock solution storage tank, 49- sec-octanol stock solution;

[0035] 451-liquid inlet, 452-organic phase outlet, 453-discharge valve, 454-water phase outlet, 455-drain valve, 456-stratification detector;

[0036] 71-discharging pipe, 72-sealing plate, 73-motor, 74-rotating rod, 75-spiral blade, 76-cleaning brush, 77-connecting rod, 78-drain pipe, 79-discharging port. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The present invention provides an automatic control system for the production of tantalum and niobium metals, such as Figure 1 As shown, it includes decomposition system, acid adjustment system, extraction system, neutralization system, central control system and automatic cleaning system;

[0039] The decomposition system comprises a reaction tank, a sulfuric acid feed pipe, a hydrofluoric acid feed pipe and a discharge pipe; valves are arranged on the feed pipe and the discharge pipe; and a liquid level meter and a temperature sensor are arranged in the reaction tank.

[0040] The acid adjustment system comprises a reaction tank, a slurry feed pipe, a sulfuric acid feed pipe, a hydrofluoric acid feed pipe and a discharge pipe; valves are arranged on the feed pipe and the discharge pipe; and a liquid level meter and a temperature sensor are arranged in the reaction tank.

[0041] The extraction system includes a plurality of extraction reaction tanks, each of which is provided with a liquid level meter; the plurality of extraction reaction tanks are connected in sequence through discharge pipes (the organic phase discharge pipe of the upper extraction tank is the feed pipe of the lower extraction tank), each reaction tank is provided with a corresponding feed pipe (slurry feed pipe, extractant feed pipe), and valves are provided on the feed pipe and the discharge pipe;

[0042] The neutralization system includes a reaction tank, a slurry feed pipe, an ammonia feed pipe, a pure water feed pipe, and a discharge pipe; valves are provided on the feed pipe and the discharge pipe, and a liquid level meter is provided in the reaction tank;

[0043] The decomposition system is used to complete the decomposition of tantalum-niobium ore. The valve of the feed pipe is controlled to open to add sulfuric acid and hydrofluoric acid into the decomposition tank in proportion. After the decomposition is completed, the valve of the discharge pipe is controlled to open, the slurry obtained by decomposition is filtered and then transported to the acid adjustment section.

[0044] The acid adjustment system is used to complete the acid adjustment work, control the feed pipe valve to open to add sulfuric acid and hydrofluoric acid into the decomposition tank in proportion, adjust the acidity of the slurry to the target value, and after completion, control the discharge pipe valve to open and transport it to the extraction section;

[0045] The extraction system includes a secondary octanol extraction reaction tank, a pickling agent extraction reaction tank, a reverse niobium agent extraction reaction tank, and a reverse tantalum agent extraction reaction tank in sequence. Corresponding reagents are added to each extraction reaction tank in proportion. The organic phase obtained in each extraction reaction tank is transported to the next extraction reaction tank. Niobium liquid is obtained after extraction with the reverse niobium agent. Tantalum liquid is obtained after the remaining organic phase is extracted with the reverse tantalum agent. The niobium liquid and the tantalum liquid are transported to the neutralization section for neutralization.

[0046] The neutralization system is used to neutralize the niobium liquid and tantalum liquid respectively, that is, to add ammonia water and pure water to the niobium liquid or tantalum liquid in proportion to adjust the slurry to the target pH;

[0047] The automatic control system also includes a potassium fluorotantalate production control system. Potassium fluorotantalate is prepared from tantalum liquid obtained by extraction. The potassium fluorotantalate production control system includes a reactor and a cooling crystallization tank. The reactor and the cooling crystallization tank are both provided with a temperature sensor and a liquid level gauge, and the temperature sensor and the liquid level gauge are connected to the central control system. The reactor is provided with a tantalum liquid feed pipe and a discharge pipe, and the discharge pipe is connected to the cooling crystallization tank. Valves are provided on the feed pipe and the discharge pipe.

[0048] The decomposition system, acid adjustment system, extraction system and neutralization system are respectively connected to the central control system; the central control system is used to receive the monitoring data of the liquid level meter and temperature sensor and control each valve;

[0049] The automatic cleaning system is arranged on the pipeline of the system and is used for cleaning the pipeline.

[0050] The temperature sensors in the present invention all adopt glass-lined sleeve thermometers filled with heat transfer oil, and are arranged in a multi-point uniform manner in a reaction tank with a large amount of material to ensure that the measured temperature is accurate.

[0051] The automatic cleaning system designed by the present invention comprises a flushing liquid feed pipe, a sewage pipe, a sample liquid extraction pipe, and a concentration meter; valves are arranged on the feed pipe, the sewage pipe, and the sample liquid extraction pipe;

[0052] The sample liquid extraction tube is connected to the sampling inlet of the concentration meter; the valves on the flushing liquid feed pipe and the sewage pipe are electrically connected to the concentration meter.

[0053] The automatic cleaning system is set at the place where the pipeline is prone to clogging, such as on the discharge pipe of the decomposition reaction tank. The sample liquid extraction pipe is connected to one side of the discharge pipe to form a three-way structure. A valve is provided on the sample liquid extraction pipe, which is controlled by the central control system. The central control system opens the valve regularly to extract sample liquid to the concentration meter for monitoring. When the sample liquid concentration is detected to be abnormal, the concentration meter sends a signal to control the valves on the flushing liquid feed pipe and the drain pipe to open. At the same time, the central control system controls the valves at both ends of the discharge pipe to close, and puts the flushing liquid into the discharge pipe to flush it, thereby realizing automatic cleaning.

[0054] In another embodiment, the discharge pipe is further provided with a sweeping mechanism, as shown in FIG. Figure 2 As shown, a sewage pipe is fixed to the lower surface of the end of the discharge pipe. The sewage pipe is inclined and the inclination direction is along the vertical direction to the right. The discharge port of the discharge pipe is arranged on the side opposite to the sewage pipe for discharging the liquid. A sealing plate is fixed to the end of the discharge pipe by mounting bolts. A motor is fixed to the right end of the sealing plate. A rotating rod is fixed to the output shaft of the motor. A through hole is opened in the center of the sealing plate. The end of the rotating rod away from the output shaft of the motor passes through the through hole and extends to the inside of the discharge pipe. A spiral blade is fixed to the outer surface of the rotating rod. Connecting rods are fixed to the left and right sides of the upper and lower ends of the rotating rod. Cleaning brushes are fixed to the opposite ends of the upper and lower connecting rods. The pipeline is cleaned by flushing with flushing liquid combined with rotating and sweeping with a cleaning brush, which effectively prevents blockage in the pipeline, improves production efficiency, and avoids frequent maintenance.

[0055] The liquid level meter of the present invention adopts a radar liquid level meter, which does not need to be in direct contact with the solution to avoid corrosion. At the same time, the radar liquid level meter is provided with a shell made of polyvinylidene fluoride material to further avoid corrosion by volatile acidic gases, thereby ensuring monitoring accuracy and having a long service life.

[0056] In the process of the present invention, the slurry contains particles and the flow signal is unstable. Therefore, the flow meter on the pipeline for conveying the slurry adopts a slurry-type, dual-frequency excitation electromagnetic flow meter to ensure stable signals and accurate data. The lining of the flow meter is made of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer (PFA) to prevent corrosion.

[0057] For some non-slurry liquid flow measurements, such as sulfuric acid, pure water, ammonia water, etc., a balanced flow meter is used to measure the flow rate. The material of the balanced flow meter and the liquid contact surface is 316L stainless steel.

[0058] The valves of the present invention are specifically selected as follows: for slurry, hydrofluoric acid, internal particles and crystallization conditions, fluorine-lined, enhanced sealing pneumatic cock valves are selected; for viscous substances, fluorine-lined V-type ball valves are used, which have a self-cleaning function. The valve body material is 304 or 316L stainless steel.

[0059] The present invention also provides a control method for the automatic control system for the production of tantalum and niobium metals:

[0060] In the decomposition system, the liquid level meter monitors the liquid level in the reaction tank and sends the liquid level data to the central control system. The central control system controls the opening and closing of the valve according to the liquid level. When the liquid level exceeds the preset maximum value, the feed valve is controlled to be closed; the temperature sensor monitors the temperature of the reaction tank and sends the temperature data to the central control system. The central control system controls the opening and closing of the sulfuric acid and hydrofluoric acid feed valves according to the temperature data; when the temperature sensor monitors that the temperature in the reaction tank is greater than 90°C, the central control system controls the closing of the sulfuric acid and hydrofluoric acid feed valves and waits for the feed liquid to cool down. When the temperature is less than 60°C, the central control system controls the opening of the sulfuric acid and hydrofluoric acid feed valves to continue feeding.

[0061] In the acid adjustment system, the temperature sensor monitors the temperature of the acid adjustment reaction tank, controls the opening and closing degree of the valve according to the temperature, controls the feed rate of sulfuric acid and hydrofluoric acid, and thus controls the heating rate; when the temperature sensor monitors that the temperature of the reaction tank is greater than 90°C, the central control system controls the closure of the sulfuric acid and hydrofluoric acid feed valves, and when the temperature is less than 60°C, the central control system controls the opening of the sulfuric acid and hydrofluoric acid feed valves.

[0062] The extraction system includes multiple extraction sections. A large amount of organic liquid extractant (octanol) is required in the extraction. In order to recycle the organic liquid, the present invention provides an organic liquid storage tank. The organic phase solution used in the extraction process is placed in the organic liquid storage tank. After standing, the solution is stratified. The lower layer is an aqueous solution containing some impurities; the upper layer is an organic liquid, which can be reused as an extractant.

[0063] Based on the concept of recycling organic liquid, the present invention also designs an organic liquid recycling system, such as Figure 3 As shown, it includes a secondary octanol extraction tank, a pickling agent extraction tank, a reverse niobium agent extraction tank, a reverse tantalum agent extraction tank, and an organic liquid storage tank connected by pipelines in sequence; corresponding reagents are added in proportion to each extraction tank for extraction, and the organic phase obtained in each extraction reaction tank is transported to the next extraction tank, and finally the reverse tantalum agent, i.e., ultrapure water, is used to extract the remaining organic phase, so that tantalum enters the water phase, and the organic phase is discharged into the organic liquid storage tank through the pipeline;

[0064] See also Figure 4 , there is a liquid inlet on the top of the organic liquid storage tank, and a stratification detector is provided in the organic liquid storage tank; a water phase outlet is provided at the bottom of the organic liquid storage tank, and a drain valve is provided at the water phase outlet; an organic phase outlet is provided on the side of the organic liquid storage tank, and a discharge valve is provided at the organic phase outlet, and the organic phase outlet is connected to the 2-octanol extraction tank through a pipeline;

[0065] Specifically, the sec-octanol extraction tank includes a sec-octanol feed pipe and a slurry feed pipe; the sec-octanol feed pipe includes a sec-octanol stock solution feed branch pipe and a sec-octanol recovery solution feed branch pipe, and the organic phase outlet is connected to the sec-octanol recovery solution feed branch pipe through a pipeline. The recovered sec-octanol can enter the sec-octanol extraction tank through the sec-octanol recovery solution feed branch pipe for utilization. Of course, each extraction will cause a small amount of sec-octanol to be consumed (it may be mixed in the water phase and discharged). As the number of extractions increases, the recovered sec-octanol will gradually decrease. At this time, new sec-octanol can be added through the sec-octanol stock solution feed branch pipe (unused sec-octanol is stored in the sec-octanol stock solution storage tank).

[0066] In this embodiment, the stratification detector adopts a radio frequency capacitance interface detector, and the radio frequency capacitance interface detector is inserted from the top of the organic liquid storage tank; because most of the organic liquid is 2-octanol, and the content of water and other impurities is relatively small, after the organic liquid is stratified, its stratification interface is located at a lower position in the organic liquid storage tank; in order to ensure that the stratification interface can be detected, it is necessary to make the bottom end of the radio frequency capacitance interface detector close to the bottom of the tank, preferably 0-10cm away from the bottom of the organic liquid storage tank. In this embodiment, the bottom end of the radio frequency capacitance interface detector is 8cm away from the bottom of the tank.

[0067] The delamination detector is electrically connected to the central control system, and the drain valve and the discharge valve are electrically connected to the central control system. The central control system receives the monitoring data of the delamination detector and controls the opening and closing of the corresponding valves according to the monitoring data.

[0068] After the organic liquid is discharged into the organic liquid storage tank, the organic liquid is allowed to stand for a period of time and then stratified. When the stratification detector detects the appearance of a stratified interface, the central control system controls the drain valve at the water phase outlet to open, the water phase is continuously discharged, and the stratified interface continuously drops; until the liquid level at the stratified interface is lower than the set minimum threshold, the central control system controls the drain valve to close. In this embodiment, the minimum threshold of the liquid level at the stratified interface is 15 cm from the tank bottom.

[0069] The height of the organic phase outlet from the tank bottom must be higher than the lowest threshold of the liquid level at the stratification interface. The organic phase outlet is preferably set at 1 / 2-1 / 4 of the height of the organic liquid storage tank, close to the bottom of the organic liquid storage tank, so that most of the organic phase solution stored in the tank can be discharged and utilized. In actual production, the setting height of the organic liquid storage tank is lower than the height of the extraction tank, so the organic phase solution needs to be pumped into the extraction tank.

[0070] Since the extracted slurry contains a large amount of sulfuric acid and hydrofluoric acid, the organic liquid will also contain a small amount of acid solution, which is corrosive. Therefore, the selected delamination detector is covered with an anti-corrosion coating on the surface. Specifically, a delamination detector made of 304 stainless steel is selected, and its surface is covered with a polytetrafluoroethylene coating, which can extend the service life of the delamination detector.

[0071] The neutralization system includes a pure water feed pipe, an ammonia feed pipe, and a liquid feed pipe. The central control system controls the flow of each feed pipe according to a preset ratio to perform neutralization. The neutralization system also includes a pure water storage tank, which is connected to the reaction tank of the neutralization system through a pure water feed pipe. The pure water storage tank is provided with a temperature sensor and a heating device to heat the pure water in the pure water storage tank; the temperature sensor monitors the water temperature in the pure water storage tank in real time, and the heating device performs heating work according to the water temperature in the pure water storage tank, and controls the water temperature to 70-80°C.

[0072] In the potassium fluorotantalate production control system, the reactor is used to react and generate potassium fluorotantalate. The temperature of the reactor is controlled at about 100°C. The reactor is equipped with a temperature sensor to measure the temperature in real time and send it to the central control system. The central control system includes a timing module. When the temperature received by the central control system reaches 100°C, the timing starts. After 2 hours, the reactor is controlled to stop heating, and the materials generated by the reaction are sent to the cooling crystallization tank for cooling by controlling the valve and pump; the cooling crystallization tank is started, and when the temperature in the cooling crystallization tank drops to 5°C, the central control system starts timing. After 24-48 hours, the central control system controls the discharge valve of the cooling crystallization tank to open and discharge. The specific reaction time and cooling crystallization time can be set according to the situation. When the temperature reaches the preset value, the timing module starts timing. After the preset time, the central control system controls the corresponding equipment to start and stop or the valve to open, so as to realize the automatic production of potassium fluorotantalate.

Claims

1. A control method for an automatic control system for tantalum-niobium metal production, characterized in that: The automatic control system for tantalum-niobium metal production includes a decomposition system, an acid adjustment system, an extraction system, a neutralization system, a central control system, and an automatic cleaning system; The decomposition system, acid adjustment system, extraction system, and neutralization system each include a reaction tank and corresponding feed pipes and discharge pipes, the feed pipes and discharge pipes are provided with valves, and each system also includes a level meter for monitoring the liquid level of the reaction tank; The decomposition system, acid adjustment system, extraction system and neutralization system are respectively connected to the central control system for communication; the automatic cleaning system is connected to the pipeline for cleaning the pipeline; The decomposition system includes a temperature sensor, the liquid level meter monitors the liquid level of the reaction tank, sends the liquid level data to the central control system, and the central control system controls the valve according to the liquid level; the temperature sensor monitors the temperature of the reaction tank, sends the temperature data to the central control system, and the central control system controls the opening and closing of the sulfuric acid and hydrofluoric acid feed valves according to the temperature data; The acid conditioning system includes a sulfuric acid feed pipe and a hydrofluoric acid feed pipe, and also includes a temperature sensor, which monitors the temperature of the acid conditioning tank and controls the opening and closing degree of the valve according to the temperature, thereby controlling the feed speed of sulfuric acid and hydrofluoric acid; The neutralization system includes a pure water feed pipe, an ammonia water feed pipe, and a liquid feed pipe, and the central control system controls the flow of each feed pipe according to a preset ratio.

2. The control method of an automatic control system for tantalum-niobium metal production according to claim 1, characterized in that: The automatic control system for tantalum-niobium metal production also includes a potassium tantalate fluoate production control system, which includes a reactor and a cooling crystallization tank; both the reactor and the cooling crystallization tank are provided with temperature sensors, which are connected to the central control system.

3. The control method of the automatic control system for tantalum-niobium metal production according to claim 1, characterized in that: The automatic cleaning system includes a flushing liquid feed pipe, a sewage pipe, a sample liquid extraction pipe, and a concentration meter; The feed pipe, drain pipe and sample liquid extraction pipe are all provided with valves; The sample liquid extraction tube is connected to the sampling inlet of the concentration meter; the valves on the flushing liquid feed pipe and the sewage pipe are electrically connected to the concentration meter.

4. The control method of an automatic control system for tantalum-niobium metal production according to claim 1, characterized in that: The liquid level meter is a radar liquid level meter, and the radar liquid level meter includes a shell made of polyvinylidene fluoride.

5. The control method of the automatic control system for tantalum-niobium metal production according to claim 1, characterized in that: A flow meter is arranged on the pipeline for conveying the slurry. The flow meter adopts a dual-frequency excitation electromagnetic flow meter, and the lining of the flow meter is made of tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer material.

6. The control method of an automatic control system for tantalum-niobium metal production according to claim 1, characterized in that: In the decomposition system, when the temperature sensor detects that the temperature in the reaction tank is greater than 90° C., the central control system controls the closing of the sulfuric acid and hydrofluoric acid feed valves; when the temperature is less than 60° C., the central control system controls the opening of the sulfuric acid and hydrofluoric acid feed valves.

7. The control method of an automatic control system for tantalum-niobium metal production according to claim 1, characterized in that: In the acid adjustment system, when the temperature sensor monitors that the temperature of the reaction tank is greater than 90°C, the central control system controls the closing of the sulfuric acid and hydrofluoric acid feed valves; when the temperature is less than 60°C, the central control system controls the opening of the sulfuric acid and hydrofluoric acid feed valves.

8. The control method of an automatic control system for tantalum-niobium metal production according to claim 1, characterized in that: The extraction system also includes an organic liquid storage tank, in which a liquid level stratification detector is arranged, and the liquid level stratification detector is connected to the central control system; a water phase outlet is arranged at the bottom of the storage tank, an organic liquid outlet is arranged at the side, and corresponding valves are arranged on the outlets; after the liquid level stratification detector detects the stratification of liquid in the storage tank, the central control system controls the valve on the water phase outlet to open and discharge the water phase; when the water phase drops to a preset liquid level, the valve on the water phase outlet is controlled to close and the drainage is stopped.

9. The control method of an automatic control system for tantalum and niobium metal production according to claim 1, characterized in that: The neutralization system includes a pure water storage tank, which is connected to the reaction tank of the neutralization system through a pure water feed pipe. A temperature sensor is provided in the pure water storage tank, and a heating device is provided to heat the pure water in the pure water storage tank; the temperature sensor monitors the water temperature in the pure water storage tank, and the heating device performs heating work according to the water temperature in the pure water storage tank, and controls the water temperature to 70-80°C.

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