Acid leaching impurity removal device for zirconium oxide processing

Abstract

The utility model discloses an acid leaching impurity removal device for zirconium oxide processing, which belongs to the technical field of zirconium oxide production equipment and structurally comprises a reaction unit, a diluted hydrochloric acid feeding unit, a diluted ammonia water feeding unit and a control system. According to the utility model, the online thermometer and the online pH meter on the reaction kettle are used for monitoring in real time and feeding data back to the control system, so that the temperature and the pH value are accurately controlled, the reaction conditions are ensured to be stable, zirconium ions are prevented from being hydrolyzed in advance or ferric ions are prevented from being precipitated incompletely, and meanwhile, the reaction temperature is reduced. The diluted hydrochloric acid and diluted ammonia water feeding unit is electrically connected with the control system, the feeding amount can be accurately controlled, the stirring speed of the stirring assembly is controlled by the control system, so that solutions are fully mixed, and the device is simple and convenient to operate, high in automation degree, easy to maintain and capable of improving the production efficiency and ensuring the purity and the quality of final zirconium oxide products.

Description

Technical Field

[0001] This utility model relates to the technical field of zirconium oxide production equipment, specifically to an acid leaching and impurity removal device for zirconium oxide processing. Background Technology

[0002] In the production of zirconium oxide, the ammonia neutralization and precipitation method is a commonly used process. This method transforms raw materials into the desired zirconium oxide product through a series of chemical reactions and precipitation separation steps. However, ferric ions are common impurities in zirconium oxychloride, and the content of ferric ions in zirconium oxychloride needs to be strictly controlled within a certain range to ensure the quality of the final zirconium oxide product. The presence of ferric ions not only affects the purity of zirconium oxide but may also trigger a series of adverse reactions in subsequent production processes, such as affecting the color and performance of the product, thereby reducing the product's market competitiveness.

[0003] In existing technologies, acid leaching is commonly used for impurity removal: acid leaching is applied to remove Fe... 3+ Zirconium oxychloride is dissolved in dilute hydrochloric acid solution. The acidic environment and high chloride ion environment of the dilute hydrochloric acid inhibit the hydrolysis of zirconium oxychloride into zirconium hydroxide colloid, while simultaneously allowing Fe... 3+ Dissolve completely; then adjust the pH of the solution to Fe using dilute ammonia. 3+ In the precipitation range (pH≈2.5-3.0), ferric hydroxide precipitate is formed, while zirconium ions (Zr) are released. 4+ The ferric hydroxide remains dissolved within this pH range, and then precipitates and aggregates through stirring and / or heating. Finally, impurities are removed by filtration. This process requires precise control of pH and temperature to avoid Zr... 4+ Pre-hydrolysis or Fe 3+ If precipitation is incomplete, the precipitate is separated from the solution by a filtration device to obtain a pure zirconium oxychloride mixed solution. After the zirconium oxychloride mixed solution passes the trivalent iron ion test, it can proceed to the next process step to continue the production of zirconium oxide using the ammonia water neutralization and precipitation method.

[0004] However, existing acid leaching and impurity removal devices have certain limitations in design and function, making it difficult to fully meet the requirements of the above-mentioned impurity removal schemes. Although these devices have basic pH control, temperature control, and stirring functions, there is still room for improvement in terms of precise pH control, ensuring stable reaction conditions, and improving impurity removal efficiency. In particular, when treating zirconium oxychloride solutions containing ferric ions, existing devices often struggle to achieve precise pH adjustment and stable control, resulting in unsatisfactory impurity removal effects and potentially affecting the quality of the final zirconium oxide product.

[0005] Therefore, developing a specialized acid leaching and impurity removal device for zirconium oxide processing is particularly important. This device should be able to precisely control reaction conditions, including pH, temperature, and stirring speed, to ensure that ferric ions are removed efficiently and completely. Simultaneously, the device should also possess advantages such as ease of operation, high degree of automation, and ease of maintenance to reduce production costs and improve production efficiency. Utility Model Content

[0006] To address the technical deficiencies in the background art, this utility model proposes an acid leaching and impurity removal device for zirconium oxide processing, which solves the aforementioned technical problems and meets practical needs. The specific technical solution is as follows:

[0007] An acid leaching and impurity removal device for zirconium oxide processing includes a reaction unit, a dilute hydrochloric acid feeding unit, a dilute ammonia feeding unit, and a control system. The reaction unit includes a reaction vessel, a stirring assembly disposed inside the reaction vessel, and a heating jacket disposed outside the reaction vessel. An online thermometer and an online pH meter are installed on the reaction vessel.

[0008] The dilute ammonia water feeding unit includes a dilute ammonia water feeding pipe and a second metering pump. One end of the dilute ammonia water feeding pipe is placed in the reaction vessel, and the other end is connected in series with the second metering pump and the dilute ammonia water storage tank.

[0009] The dilute hydrochloric acid feeding unit includes a dilute hydrochloric acid feed pipe, a first metering pump, and a dilute hydrochloric acid dropper. One end of the dilute hydrochloric acid dropper is placed inside the reactor, and the other end is connected to the liquid outlet of the first metering pump. One end of the dilute hydrochloric acid feed pipe is connected to the liquid inlet of the first metering pump, and the other end is connected to the dilute hydrochloric acid storage tank.

[0010] The control system includes a pH control module, a temperature control module, a feed control module, and a stirring control module. The dilute hydrochloric acid feed unit and the dilute ammonia feed unit are both electrically connected to the control system and are jointly controlled by the pH control module and the feed control module of the control system.

[0011] As a further technical solution of this utility model, the stirring assembly includes a motor disposed on the top of the reactor, a plurality of stirring blades disposed inside the reactor, and a rotating shaft whose two ends are respectively connected to the motor power output shaft and the stirring blades. The motor is electrically connected to the control system.

[0012] As a further technical solution of this utility model, the dilute hydrochloric acid feeding unit also includes a three-way valve and a dilute hydrochloric acid dropper disposed on the dilute hydrochloric acid feed pipe between the first metering pump and the reactor. One end of the dilute hydrochloric acid dropper is connected to one outlet end of the three-way valve, and the other end is placed inside the reactor. The inlet end of the three-way valve is connected to the first metering pump through the dilute hydrochloric acid feed pipe, and the other outlet end of the three-way valve is connected to the dilute hydrochloric acid feed pipe placed inside the reactor.

[0013] As a further technical solution of this utility model, a first filter is provided on the dilute hydrochloric acid feed pipe on the inlet side of the first metering pump, the three-way valve is an automatic valve, and the three-way valve and the first metering pump are electrically connected to the control system respectively.

[0014] As a further technical solution of this utility model, the dilute ammonia water feeding unit also includes a second filter on the dilute ammonia water feeding pipe on the liquid inlet side of the second metering pump, and a control valve on the dilute ammonia water feeding pipe between the second metering pump and the reactor. The control valve is an automatic valve, and both the control valve and the second metering pump are electrically connected to the control system.

[0015] As a further technical solution of this utility model, one end of the online pH meter is placed inside the reaction vessel, and the other end is installed on the top of the reaction vessel. The online pH meter is electrically connected to the control system.

[0016] As a further technical solution of this utility model, one end of the online thermometer is placed inside the reactor and the other end is installed on the top of the reactor. The heating jacket contains several electric heating rods arranged around the reactor. The online thermometer and the electric heating rods are both electrically connected to the control system.

[0017] As a further technical solution of this utility model, the top of the reactor is provided with a feeding port, the bottom of the reactor is provided with a discharge pipe, and the discharge pipe is connected to the filter device through a pipeline.

[0018] The beneficial effects of this utility model are as follows:

[0019] The online thermometer and pH meter on the reactor can monitor and feed data back to the control system in real time, enabling precise control of temperature and pH values. This ensures stable reaction conditions and prevents premature hydrolysis of zirconium ions or incomplete precipitation of ferric ions. The dilute hydrochloric acid and dilute ammonia feeding units are electrically connected to the control system, allowing for precise control of the feed rate and improving impurity removal efficiency. The stirring component's stirring speed is controlled by the control system to ensure thorough mixing of the solution. In addition, the installation of a first and second filter can filter impurities and prevent clogging. The design of the feeding port and discharge pipe facilitates raw material input and product output. Overall, this acid leaching impurity removal device is easy to operate, highly automated, and easy to maintain. It can reduce production costs, improve production efficiency, and ensure the purity and quality of the final zirconium oxide product. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a top view of the reaction vessel of this utility model.

[0022] Wherein: 1-Reaction unit; 11-Reaction vessel; 12-Stirring assembly; 121-Motor; 122-Rotating shaft; 123-Stirring blade; 13-Heating jacket; 131-Electric heating rod; 14-Feeding port; 15-Discharge pipe; 16-Online thermometer; 17-Online pH meter; 18-Filtering device; 2-Dilute hydrochloric acid feeding unit; 21-First filter; 22-First metering pump; 23-Three-way valve; 24-Dilute hydrochloric acid feeding pipe; 25-Dilute hydrochloric acid dropper; 26-First drip port; 3-Dilute ammonia feeding unit; 31-Second filter; 32-Second metering pump; 33-Control valve; 34-Dilute ammonia feeding pipe; 35-Second drip port. Detailed Implementation

[0023] The embodiments of this utility model will be described below with reference to the accompanying drawings and related examples. The embodiments of this utility model are not limited to the following examples, and this utility model relates to relevant necessary components in this technical field, which should be regarded as well-known technology in this technical field and can be known and mastered by those skilled in this technical field.

[0024] Combination Figures 1 to 2 As shown, this utility model discloses an acid leaching and impurity removal device for zirconium oxide processing, including a reaction unit 1, a dilute hydrochloric acid feeding unit 2, a dilute ammonia water feeding unit 3, and a control system. The reaction unit 1 includes a reaction vessel 11, a stirring assembly 12 disposed inside the reaction vessel 11, and a heating jacket 13 disposed outside the reaction vessel 11. An online thermometer 16 and an online pH meter 17 are installed on the reaction vessel 11.

[0025] The dilute ammonia water feeding unit 3 includes a dilute ammonia water feeding pipe 34 and a second metering pump 32. One end of the dilute ammonia water feeding pipe 34 is placed in the reaction vessel 11, and the other end is connected in series with the second metering pump 32 and the dilute ammonia water storage tank.

[0026] The dilute hydrochloric acid feeding unit 2 includes a dilute hydrochloric acid feed pipe 24, a first metering pump 22, and a dilute hydrochloric acid dropper 25. One end of the dilute hydrochloric acid dropper 25 is placed inside the reaction vessel 11, and the other end is connected to the liquid outlet of the first metering pump 22. One end of the dilute hydrochloric acid feed pipe 24 is connected to the liquid inlet of the first metering pump 22, and the other end is connected to the dilute hydrochloric acid storage tank.

[0027] The control system includes a pH control module, a temperature control module, a feed control module, and a stirring control module. The dilute hydrochloric acid feed unit 2 and the dilute ammonia feed unit 3 are both electrically connected to the control system and are jointly controlled by the pH control module and the feed control module of the control system.

[0028] The acid leaching and impurity removal device of this invention achieves real-time monitoring of the temperature and pH value inside the reaction vessel 11 through an online thermometer 16 and an online pH meter 17 installed on the reaction vessel 11. These sensors feed the data back to the control system, enabling the system to adjust the heating power of the heating jacket 13 and the feed rates of dilute hydrochloric acid and dilute ammonia water in a timely manner according to the actual reaction conditions, thereby ensuring that the reaction conditions are stable within the optimal range. Precise control avoids the generation of zirconium ions (Zr). 4+ Pre-hydrolyzing into zirconium hydroxide colloid also preserves the presence of ferric ions (Fe). 3+ It can be completely precipitated as ferric hydroxide at the appropriate pH value, and then removed by filtration.

[0029] The dilute hydrochloric acid feeding unit 2 and the dilute ammonia feeding unit 3 provide precise material delivery for the reaction. The dilute hydrochloric acid feeding unit 2 delivers dilute hydrochloric acid into the reactor 11 at a precisely controlled flow rate through the first metering pump 22 and the dilute hydrochloric acid dropper 25. At the same time, the three-way valve 23 makes the feeding path of dilute hydrochloric acid more flexible, allowing it to be delivered directly or through the dilute hydrochloric acid feed pipe 24 into the reactor 11 as needed. The dilute ammonia feeding unit 3 delivers dilute ammonia into the reactor 11 at a precisely controlled flow rate through the second metering pump 32 and the dilute ammonia feed pipe 34 to adjust the pH value of the solution. Precise material delivery ensures the stability of the acidity and alkalinity during the reaction process and improves the impurity removal efficiency.

[0030] Furthermore, the stirring assembly 12 ensures thorough mixing of the solution within the reactor 11, accelerating the chemical reaction. The stirring speed of the stirring assembly 12 is controlled by a control system, allowing for adjustment of the stirring intensity based on the reaction conditions, ensuring sufficient contact and reaction of the reactants in the solution. The first filter 21 and the second filter 31 effectively filter impurities from the dilute hydrochloric acid and dilute ammonia water. The feed port 14 and discharge pipe 15 facilitate the input of raw materials and the output of products, making the entire impurity removal process smoother. The discharge pipe 15 is connected to the filter device 18 via a pipeline, further ensuring the effective removal of impurities from the product and improving the purity and quality of the final zirconia product.

[0031] Combination Figure 1 As shown, in one of the preferred embodiments of the present invention, the stirring assembly 12 includes a motor 121 disposed on the top of the reactor 11, a plurality of stirring blades 123 disposed inside the reactor 11, and a rotating shaft 122 whose two ends are respectively connected to the power output shaft of the motor 121 and the stirring blades 123. The motor 121 is electrically connected to the control system.

[0032] In the process of acid leaching to remove impurities, in order to ensure that ferric ions can be effectively removed, the reactants in the solution need to be in full contact and react. The stirring blade 123 can rotate under the drive of the motor 121, thereby fully stirring the solution in the reaction vessel 11, breaking the concentration gradient in the solution, so that dilute hydrochloric acid, dilute ammonia water and zirconium oxychloride solution containing ferric ions can be mixed evenly, thereby helping to accelerate the rate of chemical reaction and improve the impurity removal efficiency.

[0033] Furthermore, the motor 121 of the stirring assembly 12 is electrically connected to the control system and is controlled by the stirring control module, allowing the stirring speed to be precisely adjusted according to the actual reaction conditions. In the initial stage of the reaction, a faster stirring speed may be needed to accelerate the mixing of reactants; while in the later stage of the reaction, in order to reduce disturbance to the precipitate that has already formed, the stirring speed may need to be appropriately reduced. Through the precise control of the control system, the stirring assembly 12 can maintain optimal working condition throughout the entire impurity removal process.

[0034] Combination Figure 1 As shown, in one of the preferred embodiments of this utility model, the dilute hydrochloric acid feeding unit 2 further includes a three-way valve 23 and a dilute hydrochloric acid dropper 25 disposed on the dilute hydrochloric acid feed pipe 24 between the first metering pump 22 and the reactor 11. One end of the dilute hydrochloric acid dropper 25 is connected to one outlet end of the three-way valve 23, and the other end is placed inside the reactor 11. The inlet end of the three-way valve 23 is connected to the first metering pump 22 through the dilute hydrochloric acid feed pipe 24, and the other outlet end of the three-way valve 23 is connected to the dilute hydrochloric acid feed pipe 24 placed inside the reactor 11.

[0035] Furthermore, in the above structure, a first filter 21 is provided on the dilute hydrochloric acid feed pipe 24 on the inlet side of the first metering pump 22, the three-way valve 23 is an automatic valve, and both the three-way valve 23 and the first metering pump 22 are electrically connected to the control system.

[0036] Specifically, in the process of removing ferric ions from zirconium oxychloride, the dilute hydrochloric acid feeding unit 2 is connected to the dilute hydrochloric acid feeding pipe 24 and the dilute hydrochloric acid drip pipe 25 through the three-way valve 23, realizing flexible switching of the feeding mode. During the feeding stage, the three-way valve 23 and the first metering pump 22 are uniformly controlled by the feeding control module. Rapid feeding is achieved through the dilute hydrochloric acid feeding pipe 24, which can ensure that the required acidity environment is quickly reached in the reactor 11. At the same time, the precise metering function of the first metering pump 22 also ensures the accuracy of the feeding amount and avoids the occurrence of over- or under-feeding.

[0037] When entering the pH adjustment stage, the pH control module of the control system takes over the control of the three-way valve 23 and the first metering pump 22. At this time, dilute hydrochloric acid is dispersed and dripped into the reactor through several first drip ports 26 on the dilute hydrochloric acid dropper 25, thereby ensuring that the dilute hydrochloric acid is evenly distributed in the reactor 11. Through the above control method, the amount of dilute hydrochloric acid added can be more accurately controlled, thereby avoiding excessive fluctuations in the solution pH value. The online pH meter 17 monitors the pH value in the reactor 11 in real time and feeds the data back to the control system. When the pH value exceeds the preset range, the control system will adjust the pump speed of the first metering pump 22 and the on / off state of the three-way valve 23 in a timely manner to ensure that the dilute hydrochloric acid can be dripped into the reactor 11 in an appropriate and stable manner, thereby effectively controlling the decrease in pH value. Through the cooperation of the dilute hydrochloric acid feeding unit 2 and the control system, the pH value in the reactor 11 can be accurately controlled to ensure Fe 3+ It can precipitate as ferric hydroxide within the optimal pH range, while zirconium ions (Zr) can precipitate as ferric hydroxide. 4+ (Then it remains in a dissolved state.)

[0038] Combination Figure 1 As shown, in one of the preferred embodiments of the present invention, the dilute ammonia water feeding unit 3 further includes a second filter 31 disposed on the dilute ammonia water feeding pipe 34 disposed on the liquid inlet side of the second metering pump 32, and a control valve 33 disposed on the dilute ammonia water feeding pipe 34 disposed between the second metering pump 32 and the reactor 11. The control valve 33 is an automatic valve, and both the control valve 33 and the second metering pump 32 are electrically connected to the control system.

[0039] In the above structure, the second filter 31 effectively filters impurities in the dilute ammonia water, preventing these impurities from entering the reaction vessel 11 and adversely affecting the reaction process. The control valve 33 is an automatic valve and is electrically connected to the control system, controlled by the pH control module. During the removal of ferric ions, when the solution pH needs to be adjusted to Fe... 3+ During the precipitation phase, the pH control module precisely controls the opening of the control valve 33 and the pumping speed of the second metering pump 32 based on the data fed back by the online pH meter 17. This allows the dilute ammonia solution to be evenly dripped into the reaction vessel 11 through several second drip ports 35 on the dilute ammonia solution inlet pipe 34, thereby more accurately adjusting the pH value of the solution. When the pH value of the solution reaches Fe 3+ During the precipitation range, Fe 3+ This will produce ferric hydroxide precipitate, while zirconium ions (Zr) will form. 4+ If it remains dissolved, the ferric hydroxide precipitate can be separated from the solution through subsequent filtration and separation steps.

[0040] Combination Figure 1As shown, in one of the preferred embodiments of the present invention, one end of the online pH meter 17 is placed inside the reaction vessel 11, and the other end is installed on the top of the reaction vessel 11. The online pH meter 17 is electrically connected to the control system.

[0041] The online pH meter 17 can monitor the pH value in the reaction solution in real time, while the other end is installed on the top of the reaction vessel 11 and electrically connected to the control system so that the monitored pH value data can be fed back to the control system in real time.

[0042] In the acid leaching process, precise control of the solution's pH value is crucial to ensuring the effective precipitation and removal of ferric ions. When Fe... 3+ After zirconium oxychloride is dissolved in dilute hydrochloric acid solution, the pH of the solution needs to be adjusted to Fe using dilute ammonia. 3+ During the sedimentation phase, the online pH meter 17 can monitor the pH value of the solution in real time and transmit the data to the control system.

[0043] Based on data fed back from the online pH meter 17, the control system precisely adjusts the feed rate of dilute ammonia water through the pH control module, thereby achieving precise control of the solution's pH value and ensuring that the solution's pH value remains consistently at the Fe... 3+ Within the precipitation range, Fe... 3+ It can be fully precipitated as ferric hydroxide, while zirconium ions (Zr) 4+ (Then it remains in a dissolved state.)

[0044] In addition, the real-time monitoring function of the online pH meter 17 can promptly detect abnormal fluctuations in pH value, such as pH value deviation from the set range due to operational errors or equipment failure. Once an abnormality is detected, the control system can immediately take measures to adjust, such as adjusting the feed rate of dilute ammonia water or suspending the feed, thereby avoiding premature hydrolysis of zirconium ions or incomplete precipitation of ferric ions.

[0045] Combination Figure 1 As shown, in one of the preferred embodiments of this utility model, one end of the online thermometer 16 is placed inside the reactor 11, and the other end is installed on the top of the reactor 11. The heating jacket 13 has a plurality of electric heating rods 131 arranged around the reactor 11. The online thermometer 16 and the electric heating rods 131 are both electrically connected to the control system.

[0046] The online thermometer 16 can monitor the temperature of the solution in the reactor 11 in real time and feed the data back to the control system. The electric heating rod 131 in the heating jacket 13 can heat the reactor 11 according to the instructions of the control system to maintain or adjust the solution temperature, thereby ensuring that the reaction is carried out at a suitable temperature and avoiding the precipitation effect of ferric ions or premature hydrolysis of zirconium ions due to excessively high or low temperatures.

[0047] Combination Figure 1 As shown, in one of the preferred embodiments of the present invention, the top of the reactor 11 is provided with a feeding port 14, and the bottom of the reactor 11 is provided with a discharge pipe 15, which is connected to the filter device 18 through a pipe.

[0048] The feeding port 14 is located at the top of the reactor 11, which makes it convenient for operators to put the zirconium oxychloride raw material containing trivalent iron ions and the required reagents into the reactor 11 for reaction. The discharge pipe 15 located at the bottom allows the treated solution to flow smoothly out of the reactor 11 after the reaction is completed. The discharge pipe 15 is connected to the filter device 18, which can effectively filter out impurities such as iron hydroxide precipitate generated in the reaction.

[0049] As one of the preferred embodiments of this utility model, the acid leaching and impurity removal device also includes a condensation and reflux unit (not shown) in its structure, which includes a condenser and a reflux pipe installed on the top of the reactor 11 and connected to the reactor 11. The lower end of the condenser is connected to the reactor 11 through the reflux pipe, and the upper end is provided with an exhaust pipe.

[0050] The condenser cools the volatilized hydrochloric acid, causing it to reliquefy and flow back into the reactor 11 through the reflux pipe. This effectively reduces the loss of hydrochloric acid through volatilization, maintains a stable concentration of hydrochloric acid within the reactor 11, and ensures pressure balance within the reactor 11. This guarantees that the reaction proceeds as expected, ensuring the use of dilute hydrochloric acid to inhibit the hydrolysis of zirconium oxychloride and to promote the reaction of Fe. 3+ The solution is fully dissolved, and the stable reaction environment also facilitates subsequent adjustment of the solution pH to Fe using dilute ammonia. 3+ In the precipitation zone, ferric hydroxide precipitate is generated, thus removing impurities.

[0051] In summary, this invention achieves efficient removal of ferric ions from zirconium oxychloride through precise control of reaction conditions, efficient material conveying and mixing, and auxiliary measures such as filtration and stirring. This improves the impurity removal efficiency and ensures the purity and quality of the final zirconium oxide product.

[0052] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. An acid leaching and impurity removal device for zirconium oxide processing, comprising a reaction unit (1), a dilute hydrochloric acid feeding unit (2), a dilute ammonia water feeding unit (3), and a control system, characterized in that: The reaction unit (1) includes a reaction vessel (11), a stirring assembly (12) disposed inside the reaction vessel (11), and a heating jacket (13) disposed outside the reaction vessel (11). An online thermometer (16) and an online pH meter (17) are installed on the reaction vessel (11). The dilute ammonia water feeding unit (3) includes a dilute ammonia water feeding pipe (34) and a second metering pump (32). One end of the dilute ammonia water feeding pipe (34) is placed in the reactor (11), and the other end is connected in series with the second metering pump (32) and the dilute ammonia water storage tank. The dilute hydrochloric acid feeding unit (2) includes a dilute hydrochloric acid feed pipe (24), a first metering pump (22) and a dilute hydrochloric acid dropper (25). One end of the dilute hydrochloric acid dropper (25) is placed inside the reactor (11), and the other end is connected to the liquid outlet of the first metering pump (22). One end of the dilute hydrochloric acid feed pipe (24) is connected to the liquid inlet of the first metering pump (22), and the other end is connected to the dilute hydrochloric acid storage tank. The control system includes a pH control module, a temperature control module, a feed control module and a stirring control module. The dilute hydrochloric acid feed unit (2) and the dilute ammonia feed unit (3) are electrically connected to the control system and are jointly controlled by the pH control module and the feed control module of the control system.

2. The acid leaching and impurity removal device for zirconium oxide processing according to claim 1, characterized in that: The stirring assembly (12) includes a motor (121) disposed on the top of the reactor (11), several stirring blades (123) disposed inside the reactor (11), and a rotating shaft (122) whose two ends are respectively connected to the power output shaft of the motor (121) and the stirring blades (123). The motor (121) is electrically connected to the control system.

3. The acid leaching and impurity removal device for zirconium oxide processing according to claim 1, characterized in that: The dilute hydrochloric acid feeding unit (2) also includes a three-way valve (23) and a dilute hydrochloric acid dropper (25) on the dilute hydrochloric acid feed pipe (24) between the first metering pump (22) and the reactor (11). One end of the dilute hydrochloric acid dropper (25) is connected to one outlet end of the three-way valve (23), and the other end is placed inside the reactor (11). The inlet end of the three-way valve (23) is connected to the first metering pump (22) through the dilute hydrochloric acid feed pipe (24), and the other outlet end of the three-way valve (23) is connected to the dilute hydrochloric acid feed pipe (24) placed inside the reactor (11).

4. The acid leaching and impurity removal device for zirconium oxide processing according to claim 3, characterized in that: A first filter (21) is provided on the dilute hydrochloric acid feed pipe (24) on the inlet side of the first metering pump (22). The three-way valve (23) is an automatic valve. The three-way valve (23) and the first metering pump (22) are electrically connected to the control system respectively.

5. The acid leaching and impurity removal device for zirconium oxide processing according to claim 1, characterized in that: The dilute ammonia water feeding unit (3) also includes a second filter (31) installed on the dilute ammonia water feeding pipe (34) on the liquid inlet side of the second metering pump (32), and a control valve (33) installed on the dilute ammonia water feeding pipe (34) between the second metering pump (32) and the reactor (11). The control valve (33) is an automatic valve, and the control valve (33) and the second metering pump (32) are electrically connected to the control system respectively.

6. The acid leaching and impurity removal device for zirconium oxide processing according to claim 1, characterized in that: One end of the online pH meter (17) is placed inside the reactor (11), and the other end is installed on the top of the reactor (11). The online pH meter (17) is electrically connected to the control system.

7. The acid leaching and impurity removal device for zirconium oxide processing according to claim 1, characterized in that: One end of the online thermometer (16) is placed inside the reactor (11), and the other end is installed on the top of the reactor (11). The heating jacket (13) has several electric heating rods (131) arranged around the reactor (11). The online thermometer (16) and the electric heating rods (131) are both electrically connected to the control system.

8. The acid leaching and impurity removal device for zirconium oxide processing according to claim 1, characterized in that: The reactor (11) is provided with a feeding port (14) at the top and a discharge pipe (15) at the bottom. The discharge pipe (15) is connected to the filter device (18) through a pipe.

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