Method for detecting and regulating molten salt components of a molten salt chlorination furnace

Abstract

This invention belongs to the field of titanium tetrachloride production technology and discloses a method for detecting and controlling the composition of molten salt in a molten salt chlorination furnace. The method includes: placing a sampling box under a protective atmosphere and introducing an inert protective gas to replace the air inside the box; taking molten salt from the molten salt chlorination furnace and injecting it into the sampling box, cooling and solidifying it under a protective atmosphere to form a molten salt sheet; performing X-ray fluorescence spectroscopy on the molten salt sheet to obtain the detection results of each component in the molten salt; comparing the detection results with preset ranges for key components of the molten salt; if the detection results of key components of the molten salt exceed the preset range, calculating the amount of raw material to be added based on the degree of component deviation and generating a control command; and outputting the control command to the raw material feeding system to adjust the amount of raw material added. The entire sampling and determination process of this invention is controlled within 5 minutes. It uses X-ray fluorescence detection technology, eliminates the need for complex sample pretreatment, and achieves automated and precise control of raw material addition based on real-time detection results, requiring minimal manual intervention.

Description

Technical Field

[0001] This invention belongs to the field of titanium tetrachloride production technology, specifically relating to a method for detecting and controlling the composition of molten salt in a molten salt chlorination furnace. Background Technology

[0002] In the production process of titanium tetrachloride using the molten salt chlorination method, the stability of the molten salt system directly determines the titanium slag conversion rate, chlorine utilization rate, and the quality of the titanium tetrachloride product. The contents of key components such as C, TiO2, NaCl, and MgCl2 in the molten salt must be strictly controlled within the optimal range. If the components deviate from the threshold, it will lead to problems such as decreased reaction efficiency, increased raw material consumption, and deterioration of product quality.

[0003] Existing molten salt composition detection technologies mainly employ chemical titration and inductively coupled plasma optical emission spectrometry (ICP-OES), which have significant drawbacks: First, the detection cycle is long, typically requiring 2-8 hours to complete the full composition detection of molten salt, failing to reflect the real-time state of the molten salt in the furnace in a timely manner; second, the detection cost is high, with expensive equipment purchase and maintenance for ICP-OES and other methods, and cumbersome operation and large reagent consumption for chemical titration; third, the detection process is complex, and the samples are prone to absorbing water and deteriorating, requiring multiple pretreatment steps for molten salt samples, which can easily introduce detection errors, and the samples are easily contaminated during processing, affecting the accuracy of the detection.

[0004] Due to the long detection cycle, the existing methods for controlling the composition of molten salt mostly rely on empirically adding raw materials, which cannot be accurately adjusted according to the real-time composition of molten salt. This results in large fluctuations in the composition of molten salt, which not only reduces the conversion rate of titanium slag and the utilization rate of chlorine, but also increases the ineffective consumption of raw materials such as titanium slag and petroleum coke. It may also cause production failures such as abnormal molten salt viscosity and pipeline blockage.

[0005] Therefore, there is an urgent need to develop a simple, rapid, and precise method for detecting and controlling the composition of molten salts to meet the needs of industrial production of titanium tetrachloride. Summary of the Invention

[0006] To address the shortcomings of the existing technology, a method for detecting and controlling the composition of molten salt in a molten salt chlorination furnace is provided. By optimizing the sampling method and detection technology, the method enables rapid determination of the full composition of molten salt within 5 minutes. Combined with real-time detection results, it enables precise automatic control of raw material replenishment, ensuring the stability of molten salt composition and reducing raw material consumption.

[0007] To achieve the above objectives, the following technical solution is adopted: This invention provides a method for detecting and controlling the composition of molten salt in a molten salt chlorination furnace, comprising the following steps: Sampling box pretreatment: Place the sampling box under a protective atmosphere and introduce inert protective gas into it to replace the air inside the box; Molten salt sampling: Molten salt is taken from the molten salt chlorination furnace and poured into a sampling box, where it is cooled and solidified under a protective atmosphere to form a molten salt sheet; Molten salt sheet detection: X-ray fluorescence spectroscopy is performed on the molten salt sheet to obtain the detection results of each component in the molten salt; Molten salt composition analysis: The detection results are compared with the preset range of key components of molten salt. If the detection results of key components of molten salt exceed the preset range, the amount of raw material to be added is calculated based on the degree of component deviation and a control command is generated. Molten salt composition control: The control command is output to the raw material feeding system to adjust the amount of corresponding raw material added; The total time from the start of the steps "molten salt sampling" and "molten salt sheet detection" to obtaining the detection results is controlled within 5 minutes; the steps of molten salt sampling, molten salt sheet detection, molten salt composition analysis and molten salt composition adjustment are executed cyclically with an interval of 15-30 minutes.

[0008] In some embodiments, the sampling box is made of a material selected from quartz, corundum, nickel-based alloys or molybdenum, and the inner wall of the sampling box is polished.

[0009] In some embodiments, the injection volume of molten salt into the sampling box is controlled so that the thickness of the molten salt sheet formed after cooling and solidification is 1-3 cm.

[0010] In some embodiments, the thickness of the molten salt sheet is 1 cm.

[0011] In some embodiments, the X-ray fluorescence spectroscopy detection employs a standard-free quantitative analysis method, with the following detection parameters: tube voltage 40-60kV, tube current 30-50mA, and single-element detection time 30-60 seconds.

[0012] In some embodiments, the preset range of key components of the molten salt includes: carbon content of 0.5-10 wt%, titanium dioxide content of 0.5-10 wt%, and sodium chloride content of 20-60 wt%.

[0013] In some embodiments, the step "if the detection result of the key component of the molten salt exceeds the preset range, calculate the amount of raw material to be added based on the degree of component deviation and generate a control instruction" includes: When the detected carbon content is below the preset lower limit, increase the amount of petroleum coke added; and / or When the detected titanium dioxide content exceeds the upper limit of the preset range, increase the chlorine gas flow rate; and / or When the detected sodium chloride content is lower than the preset lower limit, the amount of sodium chloride to be added is increased.

[0014] In some embodiments, the step of "outputting the control command to the raw material feeding system to adjust the replenishment amount of the corresponding raw material" includes: For every 0.1 wt% decrease in carbon content below the preset lower limit, the amount of petroleum coke added should be increased by 0.02-0.03 tons / hour; and / or For every 0.5 wt% increase in titanium dioxide content above the preset upper limit, increase the chlorine gas flow rate by 0.2-0.3 cubic meters per hour while maintaining the titanium slag feed rate unchanged; and / or For every 1 wt% drop in sodium chloride content below the preset lower limit, the amount of sodium chloride to be added should be increased by 0.05-0.08 tons / hour.

[0015] In some embodiments, the inert protective gas is argon or nitrogen, and the purging time is not less than 3 minutes.

[0016] In some embodiments, the molten salt composition analysis step and the molten salt composition control step are executed by a PLC control system, which is configured to: Receive molten salt composition detection results from X-ray fluorescence spectrometer; The detection results are automatically compared with the preset range of key components of molten salt stored therein; When the test result exceeds the preset range, the required amount of raw material to be added is calculated based on the pre-stored control algorithm; Output the corresponding control command to the raw material feeding system.

[0017] The present invention has the following beneficial technical effects: The present invention discloses a method for detecting and controlling the composition of molten salt in a molten salt chlorination furnace: The entire sampling and testing process takes less than 5 minutes, a significant reduction compared to the more than 2 hours required by existing detection technologies. This enables real-time and rapid detection of molten salt components, providing data support for timely regulation.

[0018] Using X-ray fluorescence detection technology, there is no need for complex sample pretreatment or the consumption of large amounts of chemical reagents, and the sampling box can be reused; at the same time, it avoids the high purchase and maintenance costs of high-end equipment such as ICP-OES, significantly reducing the detection cost.

[0019] Based on real-time detection results, the system can automatically and precisely control the addition of raw materials, avoiding the blindness of experience-based control, ensuring that the composition of molten salt remains stable within the optimal range, increasing the system's titanium yield by 2-5%, and reducing the consumption of raw materials such as titanium slag and petroleum coke by 8-12%.

[0020] The sampling process is completed under a protective atmosphere, requiring no complicated operations; X-ray fluorescence detection enables automated analysis, and the PLC control system automatically completes the output of control commands, requiring minimal manual intervention and reducing operational intensity and human error. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a flowchart of a method for detecting and controlling the composition of molten salt in a molten salt chlorination furnace according to an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to specific examples and the accompanying drawings.

[0024] It should be understood that the embodiments of the invention shown in the exemplary embodiments are merely illustrative. Although only a few embodiments have been described in detail in this invention, those skilled in the art will readily recognize that various modifications are possible without substantially departing from the teachings of the invention. Accordingly, all such modifications should be included within the scope of the invention. Other substitutions, modifications, variations, and deletions can be made to the design, operating conditions, and parameters of the following exemplary embodiments without departing from the spirit of the invention.

[0025] To address the technical shortcomings of existing molten salt chlorination furnaces, such as long detection cycles, high costs, and lagging control, this invention optimizes sampling methods and detection technologies to achieve rapid determination of the full composition of molten salt within 5 minutes. Combined with real-time detection results, it enables precise and automatic control of raw material replenishment, ensuring stable molten salt composition and reducing raw material consumption.

[0026] To achieve the above objectives, one aspect of the present invention provides a method for detecting and controlling the composition of molten salt in a molten salt chlorination furnace. Figure 1 The diagram shown is a schematic flowchart of the method.

[0027] like Figure 1 As shown, the evaluation method may include the following steps: Sampling box pretreatment: Place the sampling box under a protective atmosphere and introduce inert protective gas into it to replace the air inside the box; Molten salt sampling: Molten salt is taken from the molten salt chlorination furnace and poured into a sampling box, where it is cooled and solidified under a protective atmosphere to form a molten salt sheet; Molten salt sheet detection: X-ray fluorescence spectroscopy is performed on the molten salt sheet to obtain the detection results of each component in the molten salt; Molten salt composition analysis: The test results are compared with the preset range of key components of molten salt. If the test results of key components of molten salt exceed the preset range, the amount of raw material to be added is calculated based on the degree of deviation and a control instruction is generated. Molten salt composition control: The control command is output to the raw material feeding system to adjust the amount of corresponding raw material added; The total time from the start of the steps "molten salt sampling" and "molten salt sheet detection" to obtaining the detection results is controlled within 5 minutes; the steps of molten salt sampling, molten salt sheet detection, molten salt composition analysis and molten salt composition adjustment are executed cyclically with an interval of 15-30 minutes.

[0028] Specifically, the above-mentioned molten salt sampling, detection, and control steps are repeated every 15-30 minutes, forming a closed-loop cycle of "detection-analysis-control" to ensure that the molten salt composition remains stable within the optimal control range. The molten salt is rapidly cooled in the sampler, typically within 2-3 minutes, and then directly tested using X-ray fluorescence within 1-2 minutes. The total time for the entire sampling and determination process is controlled within 5 minutes, significantly shorter than the more than 2 hours required by existing detection technologies. This enables real-time and rapid detection of molten salt components, providing data support for timely control. In the rapid reaction process of molten salt chlorination, the composition changes rapidly; a detection delay exceeding 5 minutes will lead to severe lag in control, failing to effectively suppress composition fluctuations.

[0029] Using X-ray fluorescence detection technology, there is no need for complex sample pretreatment or the consumption of large amounts of chemical reagents, and the sampling box can be reused; at the same time, it avoids the high purchase and maintenance costs of high-end equipment such as ICP-OES, significantly reducing the detection cost.

[0030] Based on real-time detection results, the system can automatically and precisely control the addition of raw materials, avoiding the blindness of experience-based control, ensuring that the composition of molten salt remains stable within the optimal range, increasing the system's titanium yield by 2-5%, and reducing the consumption of raw materials such as titanium slag and petroleum coke by 8-12%.

[0031] In a preferred embodiment of the present invention, the sampling box is made of a material selected from quartz, corundum, nickel-based alloy or molybdenum, and the inner wall of the sampling box is polished to prevent sample adsorption.

[0032] Specifically, the material of the sampling box can be flexibly selected according to the temperature and composition of the molten salt, and the detection method is applicable to the molten salt system produced by titanium ore of different grades. It can be directly adapted to the existing molten salt chlorination furnace production system without the need for large-scale equipment modification, and its application prospects are good.

[0033] In a preferred embodiment of the present invention, the injection volume of molten salt into the sampling box is controlled so that the thickness of the molten salt sheet formed after cooling and solidification is 1-3 cm. Preferably, the thickness of the molten salt sheet is 1 cm.

[0034] Specifically, the molten salt in the furnace is quantitatively discharged into the pretreated sampling box through the sampling tube at the bottom of the molten salt chlorination furnace. The amount of molten salt injected is controlled so that the molten salt in the sampling box cools and forms a molten salt sheet with a thickness of 1 to 3 cm, preferably 1 cm. After the molten salt is injected, a protective atmosphere is continued to be introduced into the sampling box until the molten salt is completely cooled and solidified to prevent the molten salt from oxidizing when it comes into contact with air during the cooling process.

[0035] In a preferred embodiment of the present invention, X-ray fluorescence spectroscopy detection employs a standard-free quantitative analysis method, with the following detection parameters: tube voltage 40-60kV, tube current 30-50mA, and single-element detection time 30-60 seconds.

[0036] Specifically, the cooled and solidified molten salt sheet is removed from the sampling box, impurities on the surface of the molten salt sheet are removed, and it is placed on the detection stage of an X-ray fluorescence (XRF) detector. The full composition of the molten salt sheet, including C, TiO2, NaCl, and MgCl2, is determined using a standard-free quantitative analysis method.

[0037] In a preferred embodiment of the present invention, the preset ranges of the key components of the molten salt include: carbon content of 0.5-10 wt%, titanium dioxide content of 0.5-10 wt%, and sodium chloride content of 20-60 wt%. The preset ranges of the key components of the molten salt are the optimal control ranges of each key component in the molten salt preset according to the requirements of the titanium tetrachloride production process.

[0038] In a preferred embodiment of the present invention, the step "if the detection results of the key components of the molten salt exceed the preset range, calculate the amount of raw material to be added based on the degree of component deviation and generate a control command" includes: When the detected carbon content is below the preset lower limit, increase the amount of petroleum coke added; and / or When the detected titanium dioxide content exceeds the upper limit of the preset range, increase the chlorine gas flow rate; and / or When the detected sodium chloride content is lower than the preset lower limit, the amount of sodium chloride to be added is increased.

[0039] In a preferred embodiment of the present invention, the step of "outputting the control command to the raw material feeding system to adjust the replenishment amount of the corresponding raw material" includes: For every 0.1 wt% decrease in carbon content below the preset lower limit, the amount of petroleum coke added should be increased by 0.02-0.03 tons / hour; and / or For every 0.5 wt% increase in titanium dioxide content above the preset upper limit, increase the chlorine gas flow rate by 0.2-0.3 cubic meters per hour while maintaining the titanium slag feed rate unchanged; and / or For every 1 wt% drop in sodium chloride content below the preset lower limit, the amount of sodium chloride to be added should be increased by 0.05-0.08 tons / hour.

[0040] In a preferred embodiment of the present invention, the inert protective gas is argon or nitrogen, and the replacement time is not less than 3 minutes.

[0041] Specifically, the sampling box is placed in a protective atmosphere generating device, and an Ar or N2 protective atmosphere is introduced in advance to replace the air in the sampling box. The replacement time is not less than 3 minutes to ensure that there is no residual oxidizing gas in the sampling box.

[0042] The sampling process is completed under a protective atmosphere and requires no complicated operations.

[0043] In a preferred embodiment of the present invention, the molten salt composition analysis step and the molten salt composition control step are executed by a PLC control system, which is configured as follows: Receive molten salt composition detection results from X-ray fluorescence spectrometer; The test results are automatically compared with the preset range of key components of the molten salt stored in the database; When the test results exceed the preset range, the required amount of raw materials to be added is calculated based on the pre-stored control algorithm; Output the corresponding control commands to the raw material feeding system.

[0044] Specifically, the XRF detector's results are transmitted in real time to the PLC control system (Programmable Logic Controller Control System). The control system automatically compares the detection results with preset ranges to determine whether the molten salt composition deviates from the optimal range: if the detection value is within the preset range, the current raw material feed parameters are maintained; if the detection value exceeds the preset range, the raw material replenishment amount is calculated. The PLC control system automatically adjusts the replenishment amounts of titanium slag, petroleum coke, and NaCl based on the degree of composition deviation: when the C content is below 0.5wt%, the petroleum coke is added at a rate of 0.02~0.03 t / h for every 0.1wt% decrease; when the TiO2 content is above 10wt%, the chlorine gas flow rate is increased by 0.2~0.3 m³ / h for every 0.5wt% increase while maintaining the titanium slag feed rate unchanged; when the NaCl content is below 20wt%, the NaCl is added at a rate of 0.05~0.08 t / h for every 1wt% decrease.

[0045] X-ray fluorescence detection enables automated analysis. The PLC control system automatically completes the output of control commands, eliminating the need for extensive manual intervention and reducing operational intensity and human error.

[0046] The present invention is further illustrated below through examples. The accuracy of molten salt component detection in these examples is verified by comparison with ICP-OES detection results, and the raw material consumption reduction rate is calculated statistically based on raw material consumption within the same production cycle. Example 1 (1) Sampling preparation: Select a corundum material sampling box, polish the inner wall and place it in an Ar protective atmosphere generating device, and introduce Ar gas to replace it for 3 minutes.

[0047] (2) Molten salt sampling: The molten salt is discharged into the sampling box through the sampling tube at the bottom of the molten salt chlorination furnace. After cooling, a molten salt sheet with a thickness of 1 cm is formed. Ar gas protection is maintained throughout the process.

[0048] (3) Rapid detection: Place the molten salt sheet in the XRF detector, set the tube voltage to 50kV, the tube current to 40mA, and the detection time to 45s / element. Measure the contents of C, TiO2 and NaCl in the molten salt. The total detection time is 4min. The detection results are: C: 0.4wt%, TiO2: 3.2wt%, NaCl: 19wt%.

[0049] (4) Composition control: The PLC control system compares the preset thresholds (C: 0.5~10wt%, TiO2: 0.5~10wt%, NaCl: 20~60wt%) and determines that the C content is too low and the NaCl content is too low; it automatically adjusts the petroleum coke replenishment amount by 0.02t / h and the NaCl replenishment amount by 0.15t / h.

[0050] (5) Operational results: After adjustment, the molten salt composition was tested again after 30 minutes. The composition of molten salt was C: 0.52wt% and NaCl: 22.3wt%, while the other components remained stable within the optimal range. During the test, the titanium yield of the chlorination system increased by 4.5%, the consumption of titanium slag and petroleum coke decreased by 10.5% and 9.5% respectively, and the NaCl consumption decreased by 8.8%. The deviation between the XRF test results and the ICP-OES test results was ≤2%, and the test accuracy met the production requirements.

[0051] Example 2 (1) Sampling preparation: Select a nickel-based alloy sampling box, polish the inner wall and then purge with N2 gas for 4 minutes.

[0052] (2) Molten salt sampling: The material is discharged into the sampling box and cooled to form a molten salt sheet with a thickness of 1.2cm. The entire process is protected by N2 gas.

[0053] (3) Rapid detection: The XRF detector was set with tube voltage of 60kV, tube current of 50mA, detection time of 35s / element, and total detection time of 3min; the detection results were: C: 10.5wt%, TiO2: 10.5wt%, NaCl: 48wt%.

[0054] (4) Composition control: The PLC control system compares the preset thresholds (C: 0.5~10wt%, TiO2: 0.5~10wt%, NaCl: 20~60wt%). The control system determines that the C content and TiO2 content are too high; it automatically reduces the petroleum coke replenishment by 0.05t / h and increases the chlorine gas flow rate by 0.25m. 3 / h.

[0055] (5) Operational effect: After 20 minutes of adjustment, the molten salt composition changed to C: 9.1wt% and TiO2: 4.7wt%. During the test, the titanium yield of the chlorination system increased by 2.5%, and the consumption of titanium slag and petroleum coke decreased by 10.2% and 8.2% respectively. The deviation between the XRF detection result and the ICP-OES detection result was ≤1.8%, indicating excellent detection accuracy.

[0056] The above are exemplary embodiments disclosed in this invention. However, it should be noted that various changes and modifications can be made without departing from the scope of the embodiments of this invention as defined by the claims. Although the elements disclosed in the embodiments of this invention may be described or claimed individually, they may be understood as multiple unless explicitly limited to a singular number.

[0057] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the invention (including the claims) is limited to these examples. Within the framework of the invention, technical features of the above embodiments or different embodiments can be combined, and many other variations of different aspects of the invention exist, which are not provided in the details for the sake of brevity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. A method for detecting and controlling the composition of molten salt in a molten salt chlorination furnace, characterized in that, Includes the following steps: Sampling box pretreatment: Place the sampling box under a protective atmosphere and introduce inert protective gas into it to replace the air inside the box; Molten salt sampling: Molten salt is taken from the molten salt chlorination furnace and poured into a sampling box, where it is cooled and solidified under a protective atmosphere to form a molten salt sheet; Molten salt sheet detection: X-ray fluorescence spectroscopy is performed on the molten salt sheet to obtain the detection results of each component in the molten salt; Molten salt composition analysis: The detection results are compared with the preset range of key components of molten salt. If the detection results of key components of molten salt exceed the preset range, the amount of raw material to be added is calculated based on the degree of component deviation and a control command is generated. Molten salt composition control: The control command is output to the raw material feeding system to adjust the amount of corresponding raw material added; The total time from the start of the steps "molten salt sampling" and "molten salt sheet detection" to obtaining the detection results is controlled within 5 minutes; the steps of molten salt sampling, molten salt sheet detection, molten salt composition analysis and molten salt composition adjustment are executed cyclically with an interval of 15-30 minutes.

2. The detection and control method according to claim 1, characterized in that, The sampling box is made of a material selected from quartz, corundum, nickel-based alloy or molybdenum, and the inner wall of the sampling box is polished.

3. The detection and control method according to claim 1, characterized in that, Control the amount of molten salt injected into the sampling box so that the thickness of the molten salt sheet formed after cooling and solidification is 1-3 cm.

4. The detection and control method according to claim 3, characterized in that, The thickness of the molten salt sheet is 1 cm.

5. The detection and control method according to claim 1, characterized in that, The X-ray fluorescence spectroscopy detection adopts a standard-free quantitative analysis method, and the detection parameters are: tube voltage 40-60kV, tube current 30-50mA, and single element detection time 30-60 seconds.

6. The detection and control method according to claim 1, characterized in that, The preset ranges for the key components of molten salt include: carbon content 0.5-10wt%, titanium dioxide content 0.5-10wt%, and sodium chloride content 20-60wt%.

7. The detection and control method according to claim 1, characterized in that, The step "If the detection results of the key components of the molten salt exceed the preset range, calculate the amount of raw material to be added based on the degree of component deviation and generate a control instruction" includes: When the detected carbon content is below the preset lower limit, increase the amount of petroleum coke added; and / or When the detected titanium dioxide content exceeds the upper limit of the preset range, increase the chlorine gas flow rate; and / or When the detected sodium chloride content is lower than the preset lower limit, the amount of sodium chloride to be added is increased.

8. The detection and control method according to claim 7, characterized in that, The step "outputting the control command to the raw material feeding system to adjust the replenishment amount of the corresponding raw material" includes: For every 0.1 wt% decrease in carbon content below the preset lower limit, the amount of petroleum coke added should be increased by 0.02-0.03 tons / hour; and / or For every 0.5 wt% increase in titanium dioxide content above the preset upper limit, increase the chlorine gas flow rate by 0.2-0.3 cubic meters per hour while maintaining the titanium slag feed rate unchanged; and / or For every 1 wt% drop in sodium chloride content below the preset lower limit, the amount of sodium chloride to be added should be increased by 0.05-0.08 tons / hour.

9. The detection and control method according to claim 1, characterized in that, The inert protective gas is argon or nitrogen, and the replacement time is no less than 3 minutes.

10. The detection and control method according to claim 1, characterized in that, The molten salt composition analysis and molten salt composition control steps are executed by a PLC control system, which is configured as follows: Receive molten salt composition detection results from X-ray fluorescence spectrometer; The detection results are automatically compared with the preset range of key components of molten salt stored therein; When the test result exceeds the preset range, the required amount of raw material to be added is calculated based on the pre-stored control algorithm; Output the corresponding control command to the raw material feeding system.

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