Method for dynamically controlling temperature of molten salt in molten salt chlorination furnace

Abstract

The invention relates to the technical field of chemical production, and provides a method for dynamically controlling the temperature of fused salt in a fused salt chlorination furnace, which comprises the following steps: continuously adding chlorine, titanium slag, petroleum coke and chlorate into the fused salt chlorination furnace, carrying out fused salt chlorination reaction, and monitoring the temperature of the fused salt in real time; on the basis of the deviation between the real-time molten salt temperature and the preset reference temperature, the furnace returning flow of the liquid titanium tetrachloride slurry is adjusted according to a first dynamic proportion, main body excess heat is absorbed through gasification phase change of the liquid titanium tetrachloride slurry in the molten salt, and the discharge flow of the waste molten salt is adjusted according to a second dynamic proportion so that residual excess heat can be removed; and the real-time molten salt temperature is maintained to be stabilized in a process requirement interval. The scheme can guarantee continuous and efficient operation of the reaction and improve the raw material utilization rate.

Description

Technical Field

[0001] This invention relates to the field of chemical production technology, and in particular to a method for dynamic control of molten salt temperature in a molten salt chlorination furnace. Background Technology

[0002] The core industrial method for producing titanium tetrachloride is currently the molten salt chlorination process, which uses a molten salt composed of sodium chloride (NaCl) and potassium chloride (KCl) as the reaction medium, and carries out the chlorination reaction within a temperature range of 730℃ to 780℃. This temperature range is set based on the following rigid constraints: the lower temperature limit ensures the molten salt remains in a liquid state, providing the necessary fluidity and mass transfer conditions for the reaction; the upper temperature limit prevents excessive vaporization of the molten salt components, which could lead to compositional imbalance.

[0003] In existing technologies, on the one hand, because the molten salt chlorination reaction continuously releases a large amount of heat (mainly from the exothermic reaction of TiO2 with C and Cl2 to form TiCl4), if the excess heat is not removed sufficiently, the molten salt temperature will exceed 780℃, triggering vaporization; if heat dissipation is excessive, the temperature will drop below 730℃, causing the molten salt to solidify, thus posing a risk of temperature runaway. On the other hand, traditional temperature control methods rely on fixed flow rate cooling, which cannot dynamically respond to temperature fluctuations and is difficult to maintain a narrow process temperature window (730℃~780℃).

[0004] Therefore, there is an urgent need for a method for dynamic control of molten salt temperature that can simultaneously avoid the risks of molten salt vaporization and solidification, and ensure the continuous and stable operation of the reaction. Summary of the Invention

[0005] To address the risk of temperature runaway in molten salt chlorination reactions in existing technologies, traditional temperature control methods rely on fixed-flow cooling, which cannot dynamically respond to temperature fluctuations and struggle to maintain a narrow process temperature window. This disclosure provides a method for dynamic temperature control of molten salt in a molten salt chlorination furnace, comprising: Step a: Continuously add chlorine gas, titanium slag, petroleum coke and chloride salt into the molten salt chlorination furnace to carry out the molten salt chlorination reaction and monitor the molten salt temperature in real time; Step b: Based on the deviation between the real-time molten salt temperature and the preset reference temperature, adjust the return flow rate of liquid titanium tetrachloride slurry according to the first dynamic ratio, utilize its vaporization phase change in the molten salt to absorb the excess heat of the main body, and adjust the discharge flow rate of waste molten salt according to the second dynamic ratio to remove residual excess heat. Step c: Maintain the real-time molten salt temperature within the required range for the process.

[0006] In some embodiments, step b further includes: Based on the first thermal balance reference coefficient and the addition flow rate of the titanium slag, the reference value of the liquid titanium tetrachloride slurry is determined. Based on the baseline value of the liquid titanium tetrachloride slurry, the return flow rate of the liquid titanium tetrachloride slurry is calculated according to the following formula. Q 泥浆 =Q 泥浆_base ×[1+(T-T0) / C1]; Among them, Q 泥浆 Q represents the return flow rate of the liquid titanium tetrachloride slurry, expressed in kg / h. 泥浆_base The reference value for the liquid titanium tetrachloride slurry is kg / h, T is the real-time molten salt temperature in °C, T0 is the preset reference temperature in °C, and C1 is the first dynamic ratio, dimensionless.

[0007] In some embodiments, determining the baseline value of the liquid titanium tetrachloride slurry based on the thermal balance baseline coefficient and the real-time addition flow rate of the titanium slag includes: The product of the first thermal balance reference coefficient and the added flow rate of the titanium slag is calculated and used as the reference value for the liquid titanium tetrachloride slurry. The formula is as follows: Q 泥浆_base =K×Q 钛渣 ; Among them, Q 泥浆_base The reference value for the liquid titanium tetrachloride slurry is expressed in kg / h, where K is the first thermal balance reference coefficient, dimensionless, and Q is the reference value. 钛渣 The real-time addition flow rate of the titanium slag is expressed in kg / h.

[0008] In some embodiments, K is 4.3 and C1 is 100.

[0009] In some embodiments, step b further includes: The baseline value of the waste molten salt is determined based on the second thermal balance reference coefficient and the addition flow rate of the titanium slag. Based on the baseline value of the waste molten salt, the discharge flow rate of the waste molten salt is calculated according to the following formula. Q 废盐 =Q 废盐_base ×[1+(T-T0) / C2]; Among them, Q 废盐 Q represents the discharge flow rate of the waste molten salt, expressed in kg / h. 废盐_base The reference value for the waste molten salt is kg / h, T is the real-time molten salt temperature in °C, T0 is the preset reference temperature in °C, and C2 is the second dynamic ratio, dimensionless.

[0010] In some embodiments, determining the reference value of the waste molten salt based on the second thermal balance reference coefficient and the addition flow rate of the titanium slag includes: The product of the second heat balance reference coefficient and the added flow rate of the titanium slag is calculated and used as the reference value for the waste molten salt. The formula is as follows: Q 废盐_base =M×Q 钛渣 ; Among them, Q 废盐_base The reference value for the waste molten salt is given in kg / h, M is the second heat balance reference coefficient, which is dimensionless, and Q is the reference value for the waste molten salt. 钛渣 The real-time addition flow rate of the titanium slag is expressed in kg / h.

[0011] In some embodiments, M is 0.4 and C2 is 100.

[0012] In some embodiments, the preset reference temperature is determined based on the process requirement range.

[0013] In some embodiments, step c includes maintaining the real-time molten salt temperature stable within the range of 730~780°C.

[0014] In some embodiments, the preset reference temperature is 750°C.

[0015] The aforementioned method for dynamic temperature control of molten salt in a molten salt chlorination furnace acquires molten salt temperature data in real time, providing immediate feedback signals for closed-loop control. This overcomes the limitation of fixed cooling capacity in detecting temperature fluctuations, helping to identify overheating (>780℃) or underheating (<730℃) and allowing sufficient response time for regulation. Through dual-channel dynamic proportional adjustment, the latent heat of phase change during the vaporization of titanium tetrachloride slurry rapidly absorbs excess heat from the main body, directly suppressing the molten salt temperature from exceeding the upper limit (780℃), avoiding vaporization risks, efficiently absorbing heat to prevent overheating, and achieving real-time matching of heat dissipation and heat release intensity. By removing residual heat through sensible heat, reducing emissions at low temperatures slows heat dissipation and prevents the temperature from falling below the lower limit (730℃) and causing solidification. Dynamic emissions help ensure compositional stability. The titanium tetrachloride slurry bears the main body heat and the residual heat from waste molten salt treatment, forming a tiered heat dissipation mechanism. The dual-channel flow rate increases or decreases proportionally, avoiding overload or failure of single-channel control. Maintaining the process temperature range enables closed-loop control. The molten salt temperature is kept within the range of 730~780℃, which helps to provide a stable reaction space and avoid compositional imbalance.

[0016] In summary, this invention, through a synergistic mechanism of real-time monitoring and dual-channel dynamic proportional adjustment, precisely matches the exothermic intensity and heat dissipation requirements of the molten salt chlorination reaction, stably controls the molten salt temperature within the process requirement range, overcomes the risk of molten salt vaporization or solidification caused by temperature runaway, ensures continuous and efficient operation of the reaction, and improves raw material utilization. Attached Figure Description

[0017] 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 embodiments can be obtained based on these drawings without creative effort.

[0018] Figure 1 A flowchart illustrating a method for dynamic temperature control of molten salt in a molten salt chlorination furnace, as provided in one embodiment of the present invention; Figure 2 A process diagram for controlling the temperature of molten salt in a molten salt chlorination furnace, provided for another embodiment of the present invention. Detailed Implementation

[0019] The embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the embodiments and the accompanying drawings are used to illustrate the principles of this disclosure by way of example, but should not be used to limit the scope of this disclosure. This disclosure can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0020] These embodiments are provided to make the disclosure thorough and complete, and to fully express the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​set forth in these embodiments should be interpreted as exemplary only and not as limiting.

[0021] Furthermore, the terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. Terms such as "including" or "contains" mean that the element preceding the word covers the element listed after the word, and do not exclude the possibility of covering other elements as well.

[0022] All terms used in this disclosure have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0023] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[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] Please refer to Figure 1 , Figure 1 The flowchart shown illustrates a method for dynamically controlling the molten salt temperature in a molten salt chlorination furnace according to an embodiment of the present invention. The method for dynamically controlling the molten salt temperature in a molten salt chlorination furnace shown in this embodiment includes: Step a: Continuously add chlorine gas, titanium slag, petroleum coke and chloride salts into the molten salt chlorination furnace to carry out the molten salt chlorination reaction and monitor the molten salt temperature in real time.

[0026] In one specific embodiment, the chloride salt is a mixture of NaCl and KCl.

[0027] The process diagram for controlling the molten salt temperature in the molten salt chlorination furnace is shown below. Figure 2 As shown, the chlorination reaction that occurs in the molten salt chlorination furnace involving titanium slag, petroleum coke, and chloride salts is as follows: TiO2 + C + Cl2 → TiCl4 + CO2 TiO2 + 2C + 2Cl2 → TiCl4 + 2CO; The above reaction process releases a large amount of heat.

[0028] The aforementioned real-time acquisition of molten salt temperature data provides an immediate feedback signal for closed-loop control, overcoming the deficiency that a fixed cooling capacity cannot detect temperature fluctuations. This helps to identify over-temperature (>780℃) or under-temperature (<730℃) conditions, allowing for response time for regulation.

[0029] Step b: Based on the deviation between the real-time molten salt temperature and the preset reference temperature, adjust the return flow rate of liquid titanium tetrachloride slurry according to the first dynamic ratio, utilize its vaporization phase change in the molten salt to absorb the excess heat of the main body, and adjust the discharge flow rate of waste molten salt according to the second dynamic ratio to remove residual excess heat.

[0030] The first dynamic ratio is the flow rate regulation ratio of the main cooling channel (titanium tetrachloride slurry), whose core function is to absorb excess heat (>85%) from the main body and achieve rapid cooling through the latent heat of phase change. The second dynamic ratio is the flow rate regulation ratio of the auxiliary cooling channel (waste molten salt), whose core function is to remove residual excess heat (<15%) and prevent overheating through sensible heat release. It is worth noting that in actual industrial production, the values ​​of the first and second dynamic ratios can be the same (indicating that the flow rate regulation ratios of the titanium tetrachloride slurry and the waste molten salt are the same) or different (indicating that the flow rate regulation ratios of the titanium tetrachloride slurry and the waste molten salt are different). Preferably, both the first and second dynamic ratios are 100.

[0031] In one specific embodiment, the preset reference temperature is 750°C. Based on the deviation between the real-time molten salt temperature and the preset reference temperature (750°C), dual-channel cooling medium regulation is implemented. The main cooling channel adjusts the return flow rate of liquid titanium tetrachloride slurry according to a first dynamic ratio, allowing it to vaporize and undergo phase change within the molten salt to absorb excess heat from the main body. The auxiliary cooling channel adjusts the discharge flow rate of waste molten salt according to a second dynamic ratio, removing residual excess heat through sensible heat.

[0032] The above-mentioned system utilizes dual-channel dynamic proportional adjustment to rapidly absorb excess heat from the main body by leveraging the latent heat of phase change during the vaporization of titanium tetrachloride slurry. This directly suppresses the molten salt temperature from exceeding the upper limit (780℃), mitigating the risk of vaporization and efficiently absorbing heat to avoid overheating. It achieves real-time matching between heat dissipation and heat release. Residual heat is removed through sensible heat removal, and reducing emissions at low temperatures slows heat dissipation, preventing the temperature from falling below the lower limit (730℃) and causing solidification. Dynamic emissions help ensure compositional stability. The titanium tetrachloride slurry absorbs the main body's heat and the residual heat from the waste molten salt treatment, forming a tiered heat dissipation mechanism. The dual-channel flow rate is increased or decreased proportionally to avoid overload or failure of a single control method.

[0033] Step c: Maintain the real-time molten salt temperature within the range required by the process.

[0034] In one specific embodiment, the preset reference temperature is determined based on the process requirement range. Specifically, the real-time molten salt temperature is maintained stable within the process requirement range of 730~780℃.

[0035] Maintaining the above-mentioned process temperature range enables closed-loop control. Keeping the molten salt temperature within the range of 730~780℃ helps to provide a stable reaction space and avoid compositional imbalance.

[0036] The present invention discloses a method for dynamic control of molten salt temperature in a molten salt chlorination furnace. Through a synergistic mechanism of real-time monitoring and dual-channel dynamic proportional adjustment, the method accurately matches the exothermic intensity and heat dissipation requirements of the molten salt chlorination reaction, stabilizes the molten salt temperature within the process requirement range, overcomes the risk of molten salt vaporization or solidification caused by temperature runaway, ensures continuous and efficient operation of the reaction, and improves the utilization rate of raw materials.

[0037] According to several embodiments of the present invention, step b further includes: determining a reference value for the liquid titanium tetrachloride slurry based on a first heat balance reference coefficient and the addition flow rate of titanium slag; and calculating the return flow rate of the liquid titanium tetrachloride slurry according to the following formula based on the reference value of the liquid titanium tetrachloride slurry. Q 泥浆 =Q 泥浆_base ×[1+(T-T0) / C1]; Among them, Q 泥浆 Q represents the return flow rate of liquid titanium tetrachloride slurry, expressed in kg / h. 泥浆_base The reference value for liquid titanium tetrachloride slurry is kg / h, T is the real-time molten salt temperature in °C, T0 is the preset reference temperature in °C, and C1 is the first dynamic ratio, dimensionless.

[0038] According to several embodiments of the present invention, determining the reference value of liquid titanium tetrachloride slurry based on a heat balance reference coefficient and the real-time addition flow rate of titanium slag includes: calculating the product of a first heat balance reference coefficient and the addition flow rate of titanium slag, and using this product as the reference value of the liquid titanium tetrachloride slurry, as shown in the following formula. Q 泥浆_base =K×Q 钛渣 ; Among them, Q 泥浆_base The reference value for liquid titanium tetrachloride slurry is expressed in kg / h, where K is the first thermal balance reference coefficient, dimensionless, and Q... 钛渣 The real-time addition flow rate of titanium slag is expressed in kg / h.

[0039] According to several embodiments of the present invention, K is 4.3 and C1 is 100.

[0040] As a feasible embodiment of the main cooling channel, the preset reference temperature is 750℃. The flow rate adjustment for the titanium tetrachloride slurry satisfies the following: the reference return flow rate is set to 4.3 times the titanium slag addition flow rate, i.e., Q... 泥浆_base =4.3Q 钛渣 Set the first dynamic ratio C1 to 100, and dynamically adjust the flow rate Q based on the real-time molten salt temperature T. 泥浆 =4.3Q 钛渣 ×[1+(T-750) / 100], it can be seen from this formula that for every 1℃ deviation of the temperature from the reference value, the flow rate increases or decreases by 1% of the reference value.

[0041] According to several embodiments of the present invention, step b further includes: determining a reference value for the waste molten salt based on a second heat balance reference coefficient and the addition flow rate of the titanium slag; and calculating the discharge flow rate of the waste molten salt according to the following formula based on the reference value of the waste molten salt. Q 废盐 =Q 废盐_base ×[1+(T-T0) / C2]; Among them, Q 废盐 Q represents the discharge flow rate of waste molten salt, expressed in kg / h. 废盐_base The reference value for waste molten salt is kg / h, T is the real-time molten salt temperature in °C, T0 is the preset reference temperature in °C, and C2 is the second dynamic ratio, dimensionless.

[0042] According to several embodiments of the present invention, determining the baseline value of the waste molten salt based on a second heat balance baseline coefficient and the addition flow rate of titanium slag includes: calculating the product of the second heat balance baseline coefficient and the addition flow rate of titanium slag, and using it as the baseline value of the waste molten salt, as shown in the following formula. Q 废盐_base =M×Q 钛渣 ; Among them, Q 废盐_base The reference value for waste molten salt is expressed in kg / h, M is the second heat balance reference coefficient, which is dimensionless, and Q is the reference value for waste molten salt. 钛渣 The real-time addition flow rate of titanium slag is expressed in kg / h.

[0043] According to several embodiments of the present invention, M is 0.4 and C2 is 100.

[0044] As a feasible embodiment of the auxiliary cooling channel, the preset reference temperature is 750℃. The flow rate adjustment for the waste molten salt satisfies the following: the set reference discharge flow rate is 0.4 times the titanium slag addition flow rate, i.e., Q... 废盐_base =0.4Q 钛渣 The second dynamic ratio C2 is set to 100, and the flow rate Q is dynamically adjusted based on the real-time molten salt temperature T. 废盐 =0.4Q 钛渣 ×[1+(T-750) / 100], it can be seen from this formula that for every 1℃ deviation of the temperature from the reference value, the flow rate increases or decreases by 1% of the reference value.

[0045] To further understand the method for dynamic control of molten salt temperature in a molten salt chlorination furnace according to the present invention, the following detailed description is provided in specific embodiments at different molten salt temperatures.

[0046] Example 1 When the real-time molten salt temperature is 750℃, the corresponding return flow rate Q of the titanium tetrachloride slurry is... 泥浆 =4.3Q 钛渣(kg / h), waste molten salt discharge flow rate Q 废盐 =0.4Q 钛渣 (kg / h).

[0047] Example 2 When the real-time molten salt temperature is 760℃, exceeding the temperature by 10℃, the corresponding return flow rate Q of the titanium tetrachloride slurry is... 泥浆 =4.3Q 钛渣 ×1.1 (kg / h), waste molten salt discharge flow rate Q 废盐 =0.4Q 钛渣 ×1.1 (kg / h).

[0048] Example 3 When the real-time molten salt temperature is 730℃ and the low temperature is 20℃, the corresponding return flow rate Q of the titanium tetrachloride slurry is... 泥浆 =4.3Q 钛渣 ×0.8 (kg / h), waste molten salt discharge flow rate Q 废盐 =0.4Q 钛渣 ×0.8 (kg / h).

[0049] As can be seen from the above three embodiments, titanium tetrachloride slurry plays a primary cooling role, accounting for 87% of the additional heat dissipation at 760°C, demonstrating its high efficiency in latent heat of vaporization. At 730°C, the reduction in slurry volume contributes 92% to the heat storage effect. Waste molten salt plays a synergistic role; the increased emissions during overheating replenish the molten salt composition, preventing localized aging, while the reduced emissions at low temperatures maintain the stability of the molten salt volume and prevent component concentration. The technical solution of this application forms a complete closed loop of monitoring, control, and stabilization.

[0050] The embodiments of this disclosure have now been described in detail. To avoid obscuring the concept of this disclosure, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0051] While specific embodiments of this disclosure have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of this disclosure. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner.

Claims

1. A method for dynamically controlling the temperature of molten salt in a molten salt chlorination furnace, characterized in that, include: Step a: Continuously add chlorine gas, titanium slag, petroleum coke and chloride salt into the molten salt chlorination furnace to carry out the molten salt chlorination reaction and monitor the molten salt temperature in real time; Step b: Based on the deviation between the real-time molten salt temperature and the preset reference temperature, adjust the return flow rate of liquid titanium tetrachloride slurry according to the first dynamic ratio, utilize its vaporization phase change in the molten salt to absorb the excess heat of the main body, and adjust the discharge flow rate of waste molten salt according to the second dynamic ratio to remove residual excess heat. Step c: Maintain the real-time molten salt temperature within the required range for the process.

2. The method for dynamic control of molten salt temperature in a molten salt chlorination furnace according to claim 1, characterized in that, Step b further includes: Based on the first thermal balance reference coefficient and the addition flow rate of the titanium slag, the reference value of the liquid titanium tetrachloride slurry is determined. Based on the baseline value of the liquid titanium tetrachloride slurry, the return flow rate of the liquid titanium tetrachloride slurry is calculated according to the following formula. Q 泥浆 =Q 泥浆_base ×[1+(T-T0) / C1]; Among them, Q 泥浆 Q represents the return flow rate of the liquid titanium tetrachloride slurry, expressed in kg / h. 泥浆_base The reference value for the liquid titanium tetrachloride slurry is kg / h, T is the real-time molten salt temperature in °C, T0 is the preset reference temperature in °C, and C1 is the first dynamic ratio, dimensionless.

3. The method for dynamic control of molten salt temperature in a molten salt chlorination furnace according to claim 2, characterized in that, The determination of the baseline value for liquid titanium tetrachloride slurry based on the thermal balance baseline coefficient and the real-time addition flow rate of the titanium slag includes: The product of the first thermal balance reference coefficient and the added flow rate of the titanium slag is calculated and used as the reference value for the liquid titanium tetrachloride slurry. The formula is as follows: Q 泥浆_base =K×Q 钛渣 ; Among them, Q 泥浆_base The reference value for the liquid titanium tetrachloride slurry is expressed in kg / h, where K is the first thermal balance reference coefficient, dimensionless, and Q is the reference value. 钛渣 The real-time addition flow rate of the titanium slag is expressed in kg / h.

4. The method for dynamic control of molten salt temperature in a molten salt chlorination furnace according to claim 3, characterized in that, K is set to 4.3, and C1 is set to 100.

5. The method for dynamic control of molten salt temperature in a molten salt chlorination furnace according to claim 1, characterized in that, Step b further includes: The baseline value of the waste molten salt is determined based on the second thermal balance reference coefficient and the addition flow rate of the titanium slag. Based on the baseline value of the waste molten salt, the discharge flow rate of the waste molten salt is calculated according to the following formula. Q 废盐 =Q 废盐_base ×[1+(T-T0) / C2]; Among them, Q 废盐 Q represents the discharge flow rate of the waste molten salt, expressed in kg / h. 废盐_base The reference value for the waste molten salt is kg / h, T is the real-time molten salt temperature in °C, T0 is the preset reference temperature in °C, and C2 is the second dynamic ratio, dimensionless.

6. The method for dynamic control of molten salt temperature in a molten salt chlorination furnace according to claim 5, characterized in that, The determination of the baseline value for the waste molten salt based on the second thermal balance baseline coefficient and the addition flow rate of the titanium slag includes: The product of the second heat balance reference coefficient and the added flow rate of the titanium slag is calculated and used as the reference value for the waste molten salt. The formula is as follows: Q 废盐_base =M×Q 钛渣 ; Among them, Q 废盐_base The reference value for the waste molten salt is expressed in kg / h, M is the second heat balance reference coefficient, which is dimensionless, and Q is... 钛渣 The real-time addition flow rate of the titanium slag is expressed in kg / h.

7. The method for dynamic control of molten salt temperature in a molten salt chlorination furnace according to claim 6, characterized in that, M is 0.4, and C2 is 100.

8. The method for dynamic control of molten salt temperature in a molten salt chlorination furnace according to claim 1, characterized in that, The preset reference temperature is determined based on the range of process requirements.

9. The method for dynamic control of molten salt temperature in a molten salt chlorination furnace according to claim 1, characterized in that, Step c includes: The real-time molten salt temperature is maintained within the range of 730~780℃.

10. The method for dynamic control of molten salt temperature in a molten salt chlorination furnace according to claim 9, characterized in that, The preset reference temperature is 750℃.

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