Method for controlling the temperature of a zinc bath for depositing a pure zinc coating and related equipment

Abstract

The application discloses a kind of zinc liquid temperature control method of pure zinc plating layer and related equipment, comprising: determining the temperature setting value of fast cooling section hearth area electric radiation tube and the temperature setting value of fast cooling section outlet to electric radiation tube between grate;Determine the fast cooling section outlet temperature model calculation value under steady state and the fast cooling section outlet temperature correction value based on zinc liquid temperature heat balance;Determine the fast cooling section outlet temperature correction value based on the output of zinc pot induction heater;Determine the fast cooling section outlet temperature correction value based on zinc liquid temperature deviation by zinc liquid temperature deviation;Determine fast cooling section temperature setting value based on the fast cooling section outlet temperature model calculation value under steady state, the fast cooling section outlet temperature correction value based on zinc liquid temperature heat balance, the fast cooling section outlet temperature correction value based on the output of zinc pot induction heater and the fast cooling section outlet temperature correction value based on zinc liquid temperature deviation.

Description

Technical Field

[0001] This invention relates to the field of programming technology, and in particular to a method and related equipment for controlling the temperature of zinc bath in a pure zinc plating layer. Background Technology

[0002] In the hot-dip galvanizing process, the temperature of the zinc bath is a crucial factor affecting the characteristics of the galvanized layer. Furthermore, different zinc bath temperatures lead to significant variations in the physicochemical reactions between the steel substrate and the zinc bath. Different zinc bath temperatures influence iron loss from the steel, and the main components of zinc dross are closely related to iron content. Therefore, fluctuations in the zinc bath temperature have a significant impact on zinc dross formation, thus affecting product quality. The zinc bath temperature is regulated by the heat introduced by the strip steel and the power of the zinc pot's inductor. Given a fixed inductor power, the stability of the zinc bath temperature relies on the temperature of the strip steel entering the pot.

[0003] However, due to the lack of a calculation model for the strip temperature entering the pot, in order to ensure the control accuracy of the zinc liquid temperature in actual production, operators need to manually adjust the strip temperature entering the pot according to factors such as strip speed and specifications. If the monitoring is not in place, the zinc liquid temperature will fluctuate greatly, especially when the specifications change, which increases the difficulty of control and monitoring. Summary of the Invention

[0004] In view of the above problems, the present invention provides a method and related equipment for controlling the temperature of zinc liquid in pure zinc coating, the main purpose of which is to solve the problem of the lack of a more precise control method for the temperature of zinc liquid in cold rolling galvanizing units.

[0005] To solve at least one of the above-mentioned technical problems, in a first aspect, the present invention provides a method for controlling the temperature of zinc bath in a pure zinc plating coating, the method comprising:

[0006] A calculation model for the setpoint of the electric radiant tube is constructed to determine the setpoint of the electric radiant tube temperature in the furnace area of ​​the rapid cooling section and the setpoint of the electric radiant tube temperature between the outlet of the rapid cooling section and the grate. The setpoint of the electric radiant tube temperature in the furnace area of ​​the rapid cooling section and the setpoint of the electric radiant tube temperature between the outlet of the rapid cooling section and the grate are used to increase the outlet temperature of the rapid cooling section.

[0007] A calculation model for the setpoint of the strip temperature in the rapid cooling section is constructed to determine the model-calculated value of the rapid cooling section outlet temperature under steady state and the correction value of the rapid cooling section outlet temperature based on the thermal balance of the zinc liquid temperature.

[0008] The correction value for the outlet temperature of the rapid cooling section is determined by the output of the zinc pot induction heater after the output of the zinc pot induction heater exceeds the limit, the output of the zinc pot induction heater, and the upper and lower limits set by the zinc pot induction heater output system.

[0009] The correction value for the outlet temperature of the rapid cooling section is determined by the zinc liquid temperature deviation, wherein the zinc liquid temperature deviation is determined based on the difference between the actual value of the zinc liquid temperature and the set value of the zinc liquid temperature.

[0010] The rapid cooling section outlet temperature setpoint is determined based on the above-mentioned steady-state rapid cooling section outlet temperature model calculation value, the above-mentioned rapid cooling section outlet temperature correction value based on zinc liquid temperature thermal balance, the above-mentioned rapid cooling section outlet temperature correction value based on zinc pot induction heater output, and the above-mentioned rapid cooling section outlet temperature correction value based on zinc liquid temperature deviation. The above-mentioned rapid cooling section temperature setpoint is used to reduce the rapid cooling section outlet temperature.

[0011] Optionally, the above-mentioned calculation model for the setpoint of the electric radiant tube, used to determine the setpoint of the electric radiant tube temperature in the furnace region of the rapid cooling section and the setpoint of the electric radiant tube temperature between the outlet of the rapid cooling section and the grate, includes:

[0012] The temperature setpoint for the electric radiant tubes in the rapid cooling section of the furnace is determined based on the following formula:

[0013]

[0014] The above formula, T sp_ET_i The setpoint for the electric radiant tube temperature in the furnace area of ​​the rapid cooling section mentioned above; T sp_SF This is the setpoint for the strip temperature at the inlet of the rapid cooling section; T sp_ZP The setpoint for the zinc liquid temperature; i is the electric radiation controller number for the rapid cooling section furnace along the strip running path from the inlet to the outlet.

[0015] Optionally, the above-mentioned calculation model for the setpoint of the electric radiant tube, used to determine the setpoint of the electric radiant tube temperature in the furnace region of the rapid cooling section and the setpoint of the electric radiant tube temperature between the outlet of the rapid cooling section and the grate, includes:

[0016] The temperature setpoint for the electric radiant tube between the outlet of the rapid cooling section and the grate is determined based on the following formula:

[0017]

[0018] The above formula, T sp_main_ET_GI This is the setpoint for the temperature of the radiant tube between the outlet of the rapid cooling section and the grate. thk c This is the minimum strip thickness between the current roll and the next roll; T cor_ZP_1 This is the correction value for the electric radiation tube when the strip thickness is less than 0.5 mm; T cor_ZP_2 This is a correction value for electric radiation tubes with a strip thickness between 0.5 and 0.8 mm.

[0019] Optionally, the above-mentioned calculation model for the strip temperature setpoint in the rapid cooling section, used to determine the model-calculated value of the rapid cooling section outlet temperature under steady-state conditions and the correction value of the rapid cooling section outlet temperature based on the thermal balance of the zinc liquid temperature, includes:

[0020] The calculated value of the rapid cooling section outlet temperature under steady state is determined based on the following formula:

[0021]

[0022] The above formula, T sp_mode_JC The above values ​​are calculated from the model of the rapid cooling section outlet temperature under steady-state conditions. T sp_ZP Set the temperature of the zinc bath; T sp_JC_cr This is the temperature and thickness compensation value for the rapid cooling section;

[0023] The temperature and thickness compensation value for the rapid cooling section is determined based on the following formula:

[0024]

[0025] In the formula, thk c This represents the minimum strip thickness between the current roll and the next roll.

[0026] Optionally, the above-mentioned calculation model for the strip temperature setpoint in the rapid cooling section, used to determine the model-calculated value of the rapid cooling section outlet temperature under steady-state conditions and the correction value of the rapid cooling section outlet temperature based on the thermal balance of the zinc liquid temperature, includes:

[0027] The above correction value for the outlet temperature of the rapid cooling section based on the thermal balance of the zinc liquid temperature is determined using the following formula:

[0028]

[0029] The above formula, T sp_cor_ZP_heat The above is the correction value for the outlet temperature of the rapid cooling section based on the thermal balance of the zinc liquid temperature; T cor_ZP_heat_thk This is the zinc liquid temperature correction value for the strip thickness under zinc liquid thermal equilibrium. w F The width of the strip; w F_max The maximum strip width is designed for the unit; w F_min Design the minimum strip width for the unit; v F For furnace zone speed; v F_max The maximum furnace zone speed designed for the unit; v F_minMinimum furnace zone speed designed for the unit;

[0030] The zinc bath temperature correction value for the strip thickness under the above zinc bath thermal equilibrium is determined based on the following formula:

[0031]

[0032] In the above formula, t HK c This represents the minimum strip thickness between the current roll and the next roll.

[0033] Optionally, the above-mentioned method of determining the rapid cooling section outlet temperature correction value based on the output of the zinc pot induction heater by using the zinc pot induction heater output after exceeding the limit, the zinc pot induction heater output, and the upper and lower limits set by the zinc pot induction heater output system includes:

[0034] The above correction value for the rapid cooling section outlet temperature based on the output of the zinc pot induction heater is determined using the following formula:

[0035]

[0036] The above formula, T sp_cor_ZP_power The above is the correction value for the outlet temperature of the rapid cooling section based on the output of the zinc pot induction heater; k cor_ZP_power This is the correction value for the outlet temperature of the rapid cooling section after the output of the zinc pot induction heater exceeds the limit. P pv_ZP Output for zinc pot induction heater; P HL_ZP Set an upper limit for the output system of the zinc pot induction heater; P LL_ZP Set a lower limit for the output system of the zinc pot induction heater.

[0037] Optionally, the determination of the rapid cooling section temperature setpoint based on the above-mentioned model calculation value of the rapid cooling section outlet temperature under steady state, the above-mentioned correction value of the rapid cooling section outlet temperature based on the thermal balance of zinc liquid temperature, the above-mentioned correction value of the rapid cooling section outlet temperature based on the output of the zinc pot induction heater, and the above-mentioned correction value of the rapid cooling section outlet temperature based on the zinc liquid temperature deviation includes:

[0038] The above-mentioned rapid cooling section temperature setpoint is determined based on the sum of the above-mentioned steady-state rapid cooling section outlet temperature model calculation value, the above-mentioned rapid cooling section outlet temperature correction value based on zinc liquid temperature thermal balance, the above-mentioned rapid cooling section outlet temperature correction value based on zinc pot induction heater output, and the above-mentioned rapid cooling section outlet temperature correction value based on zinc liquid temperature deviation.

[0039] Secondly, embodiments of the present invention also provide a zinc bath temperature control device for pure zinc plating, comprising:

[0040] The first construction unit is used to construct a calculation model for the setpoint of the electric radiant tube to determine the setpoint of the electric radiant tube temperature in the furnace area of ​​the rapid cooling section and the setpoint of the electric radiant tube temperature between the outlet of the rapid cooling section and the grate.

[0041] The second building unit is used to build a calculation model for the setpoint of the strip temperature in the rapid cooling section to determine the calculated value of the rapid cooling section outlet temperature under steady state and the corrected value of the rapid cooling section outlet temperature based on the thermal balance of the zinc liquid temperature.

[0042] The first determining unit is used to determine the rapid cooling section outlet temperature correction value based on the output of the zinc pot induction heater by means of the zinc pot induction heater output exceeding the limit, the zinc pot induction heater output, and the upper and lower limits set by the zinc pot induction heater output system.

[0043] The second determining unit is used to determine the correction value of the rapid cooling section outlet temperature based on the zinc liquid temperature deviation, wherein the zinc liquid temperature deviation is determined based on the difference between the actual value of the zinc liquid temperature and the set value of the zinc liquid temperature.

[0044] The third determining unit is used to determine the rapid cooling section temperature setpoint based on the model calculated value of the rapid cooling section outlet temperature under the above steady state, the correction value of the rapid cooling section outlet temperature based on the thermal balance of zinc liquid temperature, the correction value of the rapid cooling section outlet temperature based on the output of the zinc pot induction heater, and the correction value of the rapid cooling section outlet temperature based on the deviation of zinc liquid temperature.

[0045] To achieve the above objectives, according to a third aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium comprising a stored program, wherein, when the program is executed by a processor, the steps of the zinc bath temperature control method for the pure zinc plating described above are implemented.

[0046] To achieve the above objectives, according to a fourth aspect of the present invention, an electronic device is provided, comprising at least one processor and at least one memory connected to the processor; wherein the processor is configured to invoke program instructions in the memory to execute the steps of the zinc liquid temperature control method for the pure zinc plating described above.

[0047] By utilizing the above technical solutions, the zinc liquid temperature control method and related equipment for pure zinc coating provided by this invention address the problem of the lack of a more precise control method for the zinc liquid temperature of cold-rolled galvanizing units. This invention determines the setpoint temperature of the electric radiant tube in the furnace region of the rapid cooling section and the setpoint temperature of the electric radiant tube between the rapid cooling section outlet and the grate by constructing a calculation model for the electric radiant tube setpoint. The aforementioned setpoint temperatures of the electric radiant tube in the furnace region of the rapid cooling section and the setpoint temperatures of the electric radiant tube between the rapid cooling section outlet and the grate are used to increase the outlet temperature of the rapid cooling section. A calculation model for the strip temperature setpoint of the rapid cooling section is also constructed to determine the model calculated value of the rapid cooling section outlet temperature under steady-state conditions and the correction value of the rapid cooling section outlet temperature based on the thermal balance of the zinc liquid temperature. The method outputs the temperature after exceeding the limit through the zinc pot induction heater. The rapid cooling section outlet temperature correction value is determined based on the output of the zinc pot induction heater by the upper and lower limits of the zinc pot induction heater output system. The rapid cooling section outlet temperature correction value is determined based on the zinc liquid temperature deviation, wherein the zinc liquid temperature deviation is determined based on the difference between the actual zinc liquid temperature and the set zinc liquid temperature. The rapid cooling section temperature setpoint is determined based on the calculated value of the rapid cooling section outlet temperature under steady-state conditions, the rapid cooling section outlet temperature correction value based on the zinc liquid temperature thermal balance, the rapid cooling section outlet temperature correction value based on the output of the zinc pot induction heater, and the rapid cooling section outlet temperature correction value based on the zinc liquid temperature deviation. The rapid cooling section temperature setpoint is used to reduce the rapid cooling section outlet temperature. In the above scheme, by studying the influence of strip steel of different thicknesses on the temperature of zinc liquid, a calculation model for the setpoint of the electric radiant tube was established, the setpoint of the electric radiant tube was obtained, and the closed-loop control of the output of the electric radiant tube was realized. By establishing the steady-state thermal balance of zinc liquid, a correction method for the setpoint of the rapid cooling section outlet temperature based on strip steel width and speed was proposed. In summary, the zinc liquid temperature control accuracy reached ±1℃, the process control capability Ppk≥2.2, and the formation of zinc dross was effectively suppressed.

[0048] Accordingly, the zinc liquid temperature control device, equipment, and computer-readable storage medium for pure zinc plating provided in the embodiments of the present invention also have the above-mentioned technical effects.

[0049] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0050] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The figures are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the figures. In the figures:

[0051] Figure 1 A schematic flowchart of a zinc bath temperature control method for pure zinc plating provided by an embodiment of the present invention is shown.

[0052] Figure 2 This invention provides a complete flowchart illustrating another method for controlling the temperature of a pure zinc plating solution according to an embodiment of the invention.

[0053] Figure 3 This diagram illustrates the relationship between the temperature and thickness compensation value of the rapid cooling section and the strip thickness according to an embodiment of the present invention.

[0054] Figure 4 This diagram illustrates the relationship between the outlet temperature correction value of the rapid cooling section based on the thermal balance of zinc liquid temperature and the strip thickness, according to an embodiment of the present invention.

[0055] Figure 5 This diagram illustrates the relationship between zinc liquid temperature deviation and compensation value according to an embodiment of the present invention.

[0056] Figure 6 This diagram illustrates the arrangement of the electric radiant tubes in a galvanizing annealing furnace according to an embodiment of the present invention.

[0057] Figure 7 This diagram illustrates the composition of a zinc bath temperature control device for pure zinc plating according to an embodiment of the present invention.

[0058] Figure 8 This diagram illustrates the composition of an electronic device for controlling the temperature of a pure zinc-plated liquid zinc layer, as provided in an embodiment of the present invention. Detailed Implementation

[0059] Exemplary embodiments of the invention will now be described in more detail with reference to the figures. While exemplary embodiments of the invention are shown in the figures, it should be understood that the invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the invention and to fully convey the scope of the invention to those skilled in the art.

[0060] To address the lack of a more precise method for controlling the temperature of the zinc bath in cold-rolled galvanizing units, this invention provides a method for controlling the temperature of the zinc bath in pure zinc coatings, such as... Figure 1 As shown, the method includes:

[0061] S101. Construct a calculation model for the setpoint of the electric radiant tube to determine the setpoint of the electric radiant tube temperature in the furnace area of ​​the rapid cooling section and the setpoint of the electric radiant tube temperature between the outlet of the rapid cooling section and the grate. The setpoint of the electric radiant tube temperature in the furnace area of ​​the rapid cooling section and the setpoint of the electric radiant tube temperature between the outlet of the rapid cooling section and the grate are used to increase the outlet temperature of the rapid cooling section.

[0062] The steps in S101 above also include S1011 and S1012:

[0063] S1011. Determine the temperature setpoint of the electric radiant tube in the furnace zone of the rapid cooling section based on the following formula:

[0064]

[0065] The above formula, T sp_ET_i The setpoint for the electric radiant tube temperature in the furnace zone of the rapid cooling section is ℃; T sp_SF The setpoint for the strip temperature at the inlet of the rapid cooling section, in °C; T sp_ZP is the setpoint for the zinc liquid temperature, in °C; i is the electric radiation controller number of the rapid cooling section furnace along the strip running path from the inlet to the outlet, with values ​​1, 2, ..., N-1, N.

[0066] In summary, the embodiment of this application calculates the set value of the electric radiant tube temperature in the furnace area of ​​the rapid cooling section based on the temperature of the strip steel at the inlet of the rapid cooling section and the temperature of the zinc liquid.

[0067] S1012. Determine the setpoint for the electric radiant tube between the outlet of the rapid cooling section and the grate based on the following formula:

[0068]

[0069] The above formula, T sp_main_ET_GI The setpoint for the electric radiant tube between the outlet of the rapid cooling section and the grate, in °C; thk c This is the minimum strip thickness between the current roll and the next roll, in mm. T cor_ZP_1 The correction value for the electric radiation tube when the strip thickness is less than 0.5 mm is taken as 50~200℃; T cor_ZP_2 The correction value for electric radiation tubes with strip thickness between 0.5 and 0.8 mm is taken as 0 to 100℃.

[0070] In summary, the embodiment of this application obtains the set value of the electric radiant tube temperature between the outlet of the rapid cooling section and the grate based on the strip thickness.

[0071] S102. Construct a calculation model for the setpoint of the strip temperature in the rapid cooling section to determine the calculated value of the rapid cooling section outlet temperature under steady state and the corrected value of the rapid cooling section outlet temperature based on the thermal balance of the zinc liquid temperature.

[0072] The steps in S102 above also include S1021 and S1022:

[0073] S1021. Determine the calculated model value of the rapid cooling section outlet temperature under the above steady-state condition based on the following formula:

[0074]

[0075] The above formula, T sp_mode_JC The measured value is the outlet temperature of the rapid cooling section under steady-state conditions, calculated by the model, in °C. T sp_ZP Set the zinc bath temperature to 400-500 °C. T sp_JC_cr This is the temperature and thickness compensation value for the rapid cooling section, in °C;

[0076] The temperature and thickness compensation value for the rapid cooling section is determined based on the following formula:

[0077]

[0078] In the formula, thk c This represents the minimum strip thickness between the current roll and the next roll.

[0079] Based on the above formula, the trend of the temperature and thickness compensation value of the rapid cooling section with the strip thickness can be determined, such as... Figure 3 As shown.

[0080] In summary, the embodiments of this application obtain the steady-state rapid cooling section outlet temperature model calculation value based on the strip thickness and zinc liquid temperature setpoint. T sp_mode_JC

[0081] S1022. Determine the above-mentioned correction value for the outlet temperature of the rapid cooling section based on the thermal balance of the zinc liquid temperature using the following formula:

[0082]

[0083] The above formula, T sp_cor_ZP_heat The above is the correction value for the outlet temperature of the rapid cooling section based on the thermal balance of the zinc liquid temperature; T cor_ZP_heat_thk This is the zinc liquid temperature correction value for the strip thickness under zinc liquid thermal equilibrium. w F The width of the strip; w F_max The maximum strip width is designed for the unit;w F_min Design the minimum strip width for the unit; v F For furnace zone speed; v F_max The maximum furnace zone speed designed for the unit; v F_min Minimum furnace zone speed designed for the unit;

[0084] For example, according to the zinc bath temperature balance, Q = Q1 + Q2 - Q3, where Q is the total heat, Q1 is the heat brought in by the strip, Q2 is the heat from the zinc pot induction heater, and Q3 is the system heat dissipation. When handling the heat balance, Q = 0, Q3 = constant, and the induction heater power is kept stable, with Q2 = constant. Therefore, the system heat change is proportional to the strip mass per unit time. Based on this, an automatic compensation value for the strip entering the pot temperature is established. T sp_cor_ZP_heat Based on the calculation model, the above-mentioned automatic compensation value for the strip steel entering the pot temperature is established, that is, the above-mentioned correction value for the rapid cooling section outlet temperature based on the thermal balance of zinc liquid temperature. T sp_cor_ZP_heat Computational model.

[0085] The zinc bath temperature correction value for the strip thickness under the above zinc bath thermal equilibrium is determined based on the following formula:

[0086]

[0087] In the above formula, t HK c This represents the minimum strip thickness between the current roll and the next roll.

[0088] In summary, the embodiments of this application, based on the thermal balance of the zinc liquid temperature, and according to the upper and lower limits of the width set by the unit and the upper and lower limits of the process section speed, obtain the correction value of the outlet temperature of the rapid cooling section. T sp_cor_ZP_heat

[0089] S103. The rapid cooling section outlet temperature correction value based on the output of the zinc pot induction heater is determined by the upper and lower limits of the zinc pot induction heater output and the zinc pot induction heater output system setting.

[0090] The above-mentioned step S103 also includes S1031:

[0091] S1031. Determine the above-mentioned correction value for the rapid cooling section outlet temperature based on the output of the zinc pot induction heater using the following formula:

[0092]

[0093] The above formula, Tsp_cor_ZP_power The value is the correction value for the outlet temperature of the rapid cooling section based on the output of the zinc pot induction heater, in °C; k cor_ZP_power This is the correction value for the outlet temperature of the rapid cooling section after the output of the zinc pot induction heater exceeds the limit, and is taken as 1~10℃. P pv_ZP Output of zinc pot induction heater, % P HL_ZP Set an upper limit for the output system of the zinc pot induction heater, % P LL_ZP Set a lower limit for the output system of the zinc pot induction heater, %.

[0094] In summary, this embodiment of the application obtains a corrected value for the outlet temperature of the rapid cooling section based on the output of the zinc pot induction heater. T sp_cor_ZP_power

[0095] S104. Determine the correction value of the rapid cooling section outlet temperature based on the zinc liquid temperature deviation, wherein the zinc liquid temperature deviation is determined based on the difference between the actual value of the zinc liquid temperature and the set value of the zinc liquid temperature.

[0096] Specifically, based on the deviation between the actual and set values ​​of the zinc liquid temperature, a correction value for the outlet temperature of the rapid cooling section is obtained. T sp_cor_ZP_temp As shown in the following formula:

[0097]

[0098] The above formula, T sp_cor_ZP_temp Δ represents the correction value for the outlet temperature of the rapid cooling section based on the temperature deviation of the zinc liquid, in °C. T ZP This refers to the temperature deviation of the zinc bath, i.e., the actual temperature of the zinc bath. T pv_ZP - Zinc liquid temperature setting value T sp_ZP .

[0099] Based on the above formula, the relationship between the correction value of the rapid cooling section outlet temperature and the zinc liquid temperature deviation is obtained, as follows: Figure 5 As shown.

[0100] S105. Based on the calculated value of the rapid cooling section outlet temperature model under the above steady state, the correction value of the rapid cooling section outlet temperature based on the thermal balance of zinc liquid temperature, the correction value of the rapid cooling section outlet temperature based on the output of the zinc pot induction heater, and the correction value of the rapid cooling section outlet temperature based on the deviation of zinc liquid temperature, the rapid cooling section temperature set value is determined, wherein the rapid cooling section temperature set value is used to reduce the rapid cooling section outlet temperature.

[0101] The above-mentioned step S105 also includes S1051:

[0102] S1051. Based on the sum of the above-mentioned steady-state rapid cooling section outlet temperature model calculation value, the above-mentioned rapid cooling section outlet temperature correction value based on zinc liquid temperature thermal balance, the above-mentioned rapid cooling section outlet temperature correction value based on zinc pot induction heater output, and the above-mentioned rapid cooling section outlet temperature correction value based on zinc liquid temperature deviation, the above-mentioned rapid cooling section temperature setpoint is determined as follows:

[0103]

[0104] The above formula: T SP_JC The setpoint for the rapid cooling section is in °C.

[0105] In summary, the embodiments of this application obtain the final rapid cooling section temperature setpoint by summing the calculated and corrected values ​​of the rapid cooling section outlet temperature model described above. T SP_JC .

[0106] Specifically, the following illustrates a specific embodiment of this application:

[0107] Application Example 1: Temperature Calculation of Electric Radiation Tubes

[0108] Layout diagram of the annealing furnace electric radiant tubes in the cold rolling galvanizing unit (see) Figure 6 As shown, there are a total of 2 sets of radiant tubes, with ET01 and ET02 in the first set and ET03 in the second set. The strip temperature at the inlet of the rapid cooling section is 760℃, and the zinc liquid temperature is 450℃. Based on the formula for the temperature setpoint of the radiant tubes in the rapid cooling section furnace area, the temperature setpoint of the radiant tubes in the rapid cooling section furnace area is obtained as follows:

[0109] (10)

[0110] In the formula: T sp_SF The setpoint for the strip temperature in the soaking zone, in °C; T sp_ZP The setpoint for the zinc bath temperature, in °C.

[0111] Application Example 2: Calculation of Correction Value for Rapid Cooling Section Outlet Temperature Based on Zinc Liquid Temperature Thermal Balance

[0112] The maximum and minimum widths of the No. 2 galvanizing unit are designed to be 1600mm and 700mm, respectively, and the maximum and minimum process speeds are 160m / min and 30m / min, respectively. Substituting these values ​​into the formula for correcting the outlet temperature of the rapid cooling section based on the thermal balance of the zinc liquid temperature, the corrected outlet temperature of the rapid cooling section based on the thermal balance of the zinc liquid temperature is obtained, as shown in the following formula:

[0113] (11)

[0114] This leads to the acquisition of corrected outlet temperatures for the rapid cooling section based on the thermal balance of the zinc liquid temperature for different specifications and speeds.

[0115] Application Example 3

[0116] A closed-loop control system for the zinc liquid in pure zinc coating was developed on the primary system of the galvanizing annealing furnace, such as... Figure 7 As shown.

[0117] Application Example 4

[0118] After the closed-loop control system for the zinc bath in the pure zinc coating was put into operation, stable closed-loop control of the zinc bath temperature was achieved. Compared with manual control, the zinc bath temperature decreased from ±1.5℃ to ±0.8℃. The zinc bath temperature Ppk increased from about 1.2 to about 2.2, with sufficient process capacity and the temperature remaining stable within ±1℃.

[0119] By employing the above technical solution, the zinc liquid temperature control method for pure zinc coating provided by this invention addresses the lack of a more precise control method for the zinc liquid temperature of cold-rolled galvanizing units. This invention establishes a calculation model for the setpoint of the electric radiant tube to determine the setpoint temperature of the electric radiant tube in the furnace region of the rapid cooling section and the setpoint temperature of the electric radiant tube between the rapid cooling section outlet and the grate. The aforementioned setpoint temperatures of the electric radiant tube in the furnace region of the rapid cooling section and the setpoint temperatures of the electric radiant tube between the rapid cooling section outlet and the grate are used to increase the outlet temperature of the rapid cooling section. A calculation model for the strip temperature setpoint of the rapid cooling section is also established to determine the model calculated value of the rapid cooling section outlet temperature under steady-state conditions and the correction value of the rapid cooling section outlet temperature based on the thermal balance of the zinc liquid temperature. The method utilizes the zinc pot induction heater to output the rapid cooling temperature after exceeding the limit. The rapid cooling section outlet temperature correction value is determined based on the output of the zinc pot induction heater by the section outlet temperature correction value, the output of the zinc pot induction heater, and the upper and lower limits of the zinc pot induction heater output system. The rapid cooling section outlet temperature correction value is determined based on the zinc liquid temperature deviation, wherein the zinc liquid temperature deviation is determined based on the difference between the actual value of the zinc liquid temperature and the set value of the zinc liquid temperature. The rapid cooling section temperature set value is determined based on the rapid cooling section outlet temperature model calculation value under the above steady state, the rapid cooling section outlet temperature correction value based on the zinc liquid temperature thermal balance, the rapid cooling section outlet temperature correction value based on the output of the zinc pot induction heater, and the rapid cooling section outlet temperature correction value based on the zinc liquid temperature deviation. The rapid cooling section temperature set value is used to reduce the rapid cooling section outlet temperature. In the above scheme, by studying the influence of strip steel of different thicknesses on the temperature of zinc liquid, a calculation model for the setpoint of the electric radiant tube was established, the setpoint of the electric radiant tube was obtained, and the closed-loop control of the output of the electric radiant tube was realized. By establishing the steady-state thermal balance of zinc liquid, a correction method for the setpoint of the rapid cooling section outlet temperature based on strip steel width and speed was proposed. In summary, the zinc liquid temperature control accuracy reached ±1℃, the process control capability Ppk≥2.2, and the formation of zinc dross was effectively suppressed.

[0120] Furthermore, as a response to the above Figure 1 In addition to the method shown, this embodiment of the invention also provides a zinc bath temperature control device for pure zinc plating, used to control the above-mentioned... Figure 1 The method shown is implemented accordingly. This device embodiment corresponds to the foregoing method embodiment. For ease of reading, this device embodiment will not repeat the details of the foregoing method embodiment, but it should be clear that the device in this embodiment can implement all the contents of the foregoing method embodiment. Figure 7 As shown, the device includes: a first construction unit 21, a second construction unit 22, a first determination unit 23, a second determination unit 24, and a third determination unit 25, wherein...

[0121] The first building unit 21 is used to build a calculation model for the setpoint of the electric radiant tube to determine the setpoint of the electric radiant tube temperature in the furnace area of ​​the rapid cooling section and the setpoint of the electric radiant tube temperature between the outlet of the rapid cooling section and the grate.

[0122] The second building unit 22 is used to build a calculation model for the setpoint of the strip temperature in the rapid cooling section to determine the calculated value of the rapid cooling section outlet temperature model under steady state and the corrected value of the rapid cooling section outlet temperature based on the thermal balance of the zinc liquid temperature.

[0123] The first determining unit 23 is used to determine the rapid cooling section outlet temperature correction value based on the output of the zinc pot induction heater by means of the zinc pot induction heater output exceeding the limit, the zinc pot induction heater output, and the upper and lower limits set by the zinc pot induction heater output system.

[0124] The second determining unit 24 is used to determine the correction value of the rapid cooling section outlet temperature based on the zinc liquid temperature deviation, wherein the zinc liquid temperature deviation is determined based on the difference between the actual value of the zinc liquid temperature and the set value of the zinc liquid temperature.

[0125] The third determining unit 25 is used to determine the rapid cooling section temperature setpoint based on the calculated value of the rapid cooling section outlet temperature model under the above steady state, the corrected value of the rapid cooling section outlet temperature based on the thermal balance of zinc liquid temperature, the corrected value of the rapid cooling section outlet temperature based on the output of the zinc pot induction heater, and the corrected value of the rapid cooling section outlet temperature based on the deviation of zinc liquid temperature.

[0126] The processor contains a kernel, which retrieves the corresponding program unit from memory. One or more kernels can be configured, and by adjusting kernel parameters, a method for controlling the temperature of the zinc bath in pure zinc plating can be implemented. This solves the problem of the lack of a more precise control method for the temperature of the zinc bath in cold-rolled galvanizing units.

[0127] This invention provides a computer-readable storage medium including a stored program that, when executed by a processor, implements the zinc bath temperature control method for pure zinc plating.

[0128] This invention provides a processor for running a program, wherein the program executes the zinc bath temperature control method for the pure zinc plating.

[0129] This invention provides an electronic device, which includes at least one processor and at least one memory connected to the processor; wherein the processor is used to call program instructions in the memory to execute the zinc bath temperature control method for pure zinc plating as described above.

[0130] This invention provides an electronic device 30, such as... Figure 8As shown, the electronic device includes at least one processor 301, and at least one memory 302 and bus 303 connected to the processor; wherein, the processor 301 and the memory 302 communicate with each other through the bus 303; the processor 301 is used to call program instructions in the memory to execute the above-mentioned zinc liquid temperature control method for pure zinc plating.

[0131] The smart electronic devices mentioned in this article can be PCs, tablets, mobile phones, etc.

[0132] This application also provides a computer program product that, when executed on a process management electronic device, is suitable for executing a program that initializes the steps of the zinc bath temperature control method with the above-described pure zinc coating.

[0133] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0134] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0135] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0136] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0137] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0138] This application also provides a computer program product, which includes computer software instructions that, when executed on a processing device, cause the processing device to perform actions such as... Figure 1 The control flow of the memory in the corresponding embodiment.

[0139] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0140] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0141] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0142] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0143] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0144] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0145] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A method for controlling the temperature of a zinc bath in a pure zinc plating process, characterized in that, include: A calculation model for the setpoint of the electric radiant tube is constructed to determine the setpoint of the electric radiant tube temperature in the furnace area of ​​the rapid cooling section and the setpoint of the electric radiant tube temperature between the outlet of the rapid cooling section and the grate. The setpoint of the electric radiant tube temperature in the furnace area of ​​the rapid cooling section and the setpoint of the electric radiant tube temperature between the outlet of the rapid cooling section and the grate are used to increase the outlet temperature of the rapid cooling section. A calculation model for the setpoint of the strip temperature in the rapid cooling section is constructed to determine the model-calculated value of the rapid cooling section outlet temperature under steady state and the correction value of the rapid cooling section outlet temperature based on the thermal balance of the zinc liquid temperature. The correction value for the outlet temperature of the rapid cooling section is determined by the output of the zinc pot induction heater after the output of the zinc pot induction heater exceeds the limit, the output of the zinc pot induction heater, and the upper and lower limits set by the zinc pot induction heater output system. The correction value for the outlet temperature of the rapid cooling section is determined by the zinc liquid temperature deviation, wherein the zinc liquid temperature deviation is determined based on the difference between the actual value of the zinc liquid temperature and the set value of the zinc liquid temperature. The rapid cooling section temperature setpoint is determined based on the model calculation value of the rapid cooling section outlet temperature under steady state, the correction value of the rapid cooling section outlet temperature based on the thermal balance of zinc liquid temperature, the correction value of the rapid cooling section outlet temperature based on the output of the zinc pot induction heater, and the correction value of the rapid cooling section outlet temperature based on the zinc liquid temperature deviation. The rapid cooling section temperature setpoint is used to reduce the rapid cooling section outlet temperature. The construction of the rapid cooling section strip temperature setpoint calculation model to determine the model calculated value of the rapid cooling section outlet temperature under steady state and the corrected value of the rapid cooling section outlet temperature based on the zinc liquid temperature thermal balance includes: The calculated value of the rapid cooling section outlet temperature under steady state is determined based on the following formula: The above formula, T sp_mode_JC The calculated value of the outlet temperature of the rapid cooling section under steady-state conditions; T sp_ZP Set the temperature of the zinc bath; T sp_JC_cr This is the temperature and thickness compensation value for the rapid cooling section; The temperature and thickness compensation value of the rapid cooling section is determined based on the following formula: In the formula, thk c This is the minimum strip thickness between the current roll and the next roll; The construction of the rapid cooling section strip temperature setpoint calculation model to determine the model calculated value of the rapid cooling section outlet temperature under steady state and the corrected value of the rapid cooling section outlet temperature based on the zinc liquid temperature thermal balance includes: The correction value for the outlet temperature of the rapid cooling section based on the thermal balance of the zinc liquid temperature is determined using the following formula: The above formula, T sp_cor_ZP_heat This is the correction value for the outlet temperature of the rapid cooling section based on the thermal balance of the zinc liquid temperature; T cor_ZP_heat_thk This is the zinc liquid temperature correction value for the strip thickness under zinc liquid thermal equilibrium. w F The width of the strip; w F_max The maximum strip width is designed for the unit; w F_min Design the minimum strip width for the unit; v F For furnace zone speed; v F_max The maximum furnace zone speed designed for the unit; v F_min Minimum furnace zone speed designed for the unit; The zinc bath temperature correction value for the strip thickness under zinc bath thermal equilibrium is determined based on the following formula: In the above formula, t HK c This is the minimum strip thickness between the current roll and the next roll; The method of determining the rapid cooling section outlet temperature correction value based on the output of the zinc pot induction heater by means of the zinc pot induction heater output exceeding the limit, the zinc pot induction heater output, and the upper and lower limits set by the zinc pot induction heater output system includes: The correction value for the rapid cooling section outlet temperature based on the output of the zinc pot induction heater is determined using the following formula: The above formula, T sp_cor_ZP_power This is the correction value for the outlet temperature of the rapid cooling section based on the output of the zinc pot induction heater; k cor_ZP_power This is the correction value for the outlet temperature of the rapid cooling section after the output of the zinc pot induction heater exceeds the limit. P pv_ZP Output for zinc pot induction heater; P HL_ZP Set an upper limit for the output system of the zinc pot induction heater; P LL_ZP Set a lower limit for the output system of the zinc pot induction heater.

2. The method according to claim 1, characterized in that, The calculation model for the setpoint of the electric radiant tube is constructed to determine the setpoint temperature of the electric radiant tube in the furnace region of the rapid cooling section and the setpoint temperature of the electric radiant tube between the outlet of the rapid cooling section and the grate, including: The temperature setpoint of the electric radiant tube in the rapid cooling section of the furnace is determined based on the following formula: The above formula, T sp_ET_i The set value for the temperature of the electric radiant tube in the furnace area of ​​the rapid cooling section; T sp_SF This is the setpoint for the strip temperature at the inlet of the rapid cooling section; T sp_ZP The setpoint for the zinc liquid temperature; i is the electric radiation controller number for the rapid cooling section furnace along the strip running path from the inlet to the outlet.

3. The method according to claim 1, characterized in that, The calculation model for the setpoint of the electric radiant tube is constructed to determine the setpoint temperature of the electric radiant tube in the furnace region of the rapid cooling section and the setpoint temperature of the electric radiant tube between the outlet of the rapid cooling section and the grate, including: The setpoint for the electric radiant tube between the outlet of the rapid cooling section and the grate is determined based on the following formula: The above formula, T sp_main_ET_GI The set value for the temperature of the electric radiant tube between the outlet of the rapid cooling section and the grate; thk c This is the minimum strip thickness between the current roll and the next roll; T cor_ZP_1 This is the correction value for the electric radiation tube when the strip thickness is less than 0.5 mm; T cor_ZP_2 This is a correction value for electric radiation tubes with a strip thickness between 0.5 and 0.8 mm.

4. The method according to claim 1, characterized in that, The determination of the rapid cooling section temperature setpoint based on the model calculated value of the rapid cooling section outlet temperature under steady state, the corrected value of the rapid cooling section outlet temperature based on the thermal balance of zinc liquid temperature, the corrected value of the rapid cooling section outlet temperature based on the output of the zinc pot induction heater, and the corrected value of the rapid cooling section outlet temperature based on the zinc liquid temperature deviation includes: The setpoint for the rapid cooling section temperature is determined by summing the calculated value of the rapid cooling section outlet temperature under steady-state conditions, the corrected value of the rapid cooling section outlet temperature based on the thermal balance of the zinc liquid temperature, the corrected value of the rapid cooling section outlet temperature based on the output of the zinc pot induction heater, and the corrected value of the rapid cooling section outlet temperature based on the deviation of the zinc liquid temperature.

5. A zinc bath temperature control device for pure zinc plating, characterized in that, include: The first construction unit is used to construct a calculation model for the setpoint of the electric radiant tube to determine the setpoint of the electric radiant tube temperature in the furnace area of ​​the rapid cooling section and the setpoint of the electric radiant tube temperature between the outlet of the rapid cooling section and the grate. The second building unit is used to build a calculation model for the setpoint of the strip temperature in the rapid cooling section to determine the calculated value of the rapid cooling section outlet temperature under steady state and the corrected value of the rapid cooling section outlet temperature based on the thermal balance of the zinc liquid temperature. The first determining unit is used to determine the rapid cooling section outlet temperature correction value based on the output of the zinc pot induction heater by means of the zinc pot induction heater output exceeding the limit, the zinc pot induction heater output, and the upper and lower limits set by the zinc pot induction heater output system. The second determining unit is used to determine the correction value of the rapid cooling section outlet temperature based on the zinc liquid temperature deviation, wherein the zinc liquid temperature deviation is determined based on the difference between the actual value of the zinc liquid temperature and the set value of the zinc liquid temperature. The third determining unit is used to determine the rapid cooling section temperature setpoint based on the model calculated value of the rapid cooling section outlet temperature under steady state, the correction value of the rapid cooling section outlet temperature based on the thermal balance of zinc liquid temperature, the correction value of the rapid cooling section outlet temperature based on the output of the zinc pot induction heater, and the correction value of the rapid cooling section outlet temperature based on the zinc liquid temperature deviation. The construction of the rapid cooling section strip temperature setpoint calculation model to determine the model calculated value of the rapid cooling section outlet temperature under steady state and the corrected value of the rapid cooling section outlet temperature based on the zinc liquid temperature thermal balance includes: The calculated value of the rapid cooling section outlet temperature under steady state is determined based on the following formula: The above formula, T sp_mode_JC The calculated value of the outlet temperature of the rapid cooling section under steady-state conditions; T sp_ZP Set the temperature of the zinc bath; T sp_JC_cr This is the temperature and thickness compensation value for the rapid cooling section; The temperature and thickness compensation value of the rapid cooling section is determined based on the following formula: In the formula, thk c This is the minimum strip thickness between the current roll and the next roll; The construction of the rapid cooling section strip temperature setpoint calculation model to determine the model calculated value of the rapid cooling section outlet temperature under steady state and the corrected value of the rapid cooling section outlet temperature based on the zinc liquid temperature thermal balance includes: The correction value for the outlet temperature of the rapid cooling section based on the thermal balance of the zinc liquid temperature is determined using the following formula: The above formula, T sp_cor_ZP_heat This is the correction value for the outlet temperature of the rapid cooling section based on the thermal balance of the zinc liquid temperature; T cor_ZP_heat_thk This is the zinc liquid temperature correction value for the strip thickness under zinc liquid thermal equilibrium. w F The width of the strip; w F_max The maximum strip width is designed for the unit; w F_min Design the minimum strip width for the unit; v F For furnace zone speed; v F_max The maximum furnace zone speed designed for the unit; v F_min Minimum furnace zone speed designed for the unit; The zinc bath temperature correction value for the strip thickness under zinc bath thermal equilibrium is determined based on the following formula: In the above formula, t HK c This is the minimum strip thickness between the current roll and the next roll; The method of determining the rapid cooling section outlet temperature correction value based on the output of the zinc pot induction heater by means of the zinc pot induction heater output exceeding the limit, the zinc pot induction heater output, and the upper and lower limits set by the zinc pot induction heater output system includes: The correction value for the rapid cooling section outlet temperature based on the output of the zinc pot induction heater is determined using the following formula: The above formula, T sp_cor_ZP_power This is the correction value for the outlet temperature of the rapid cooling section based on the output of the zinc pot induction heater; k cor_ZP_power This is the correction value for the outlet temperature of the rapid cooling section after the output of the zinc pot induction heater exceeds the limit. P pv_ZP Output for zinc pot induction heater; P HL_ZP Set an upper limit for the output system of the zinc pot induction heater; P LL_ZP Set a lower limit for the output system of the zinc pot induction heater.

6. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed by a processor, it implements a method for controlling the temperature of the zinc bath for a pure zinc plating as described in any one of claims 1 to 4.

7. An electronic device, characterized in that, The electronic device includes at least one processor and at least one memory connected to the processor; wherein the processor is used to call program instructions in the memory to execute the zinc liquid temperature control method for pure zinc plating as described in any one of claims 1 to 4.

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