Aluminum liquid temperature control device and aluminum liquid temperature control method

Abstract

The present application relates to the field of aluminum liquid temperature control, and specifically to an aluminum liquid temperature control device and an aluminum liquid temperature control method. The aluminum liquid temperature control device includes a filter box, a flow trough and a front box, the filter box is used to filter the aluminum liquid degassed by the degassing box, the flow trough is used to introduce the aluminum liquid filtered by the filter box into the front box, and the front box is used to output the aluminum liquid for casting and rolling. The aluminum liquid temperature control device also includes a temperature control mechanism, and the temperature control mechanism includes a first temperature measuring structure and a heating structure. The first temperature measuring structure is arranged in the front box, and is used to measure the temperature of the aluminum liquid in the front box. The heating structure is partially arranged in the filter box, and is used to heat the aluminum liquid in the filter box. The first temperature measuring structure is electrically connected to the heating structure. By directly monitoring the temperature of the aluminum liquid in the front box, the temperature of the aluminum liquid outflow can be better controlled, thereby improving the quality of the ingot.

Description

Technical Field

[0001] The present application relates to the field of aluminum liquid temperature control, and in particular to an aluminum liquid temperature control device and an aluminum liquid temperature control method. Background Art

[0002] At present, between smelting and casting, before the aluminum liquid enters the casting mold, the aluminum liquid after smelting and refining reaches the degassing box, flows through the filter box to the flow channel, enters the front box, and then enters the casting nozzle. When the melt flows out of the casting nozzle outlet, it immediately contacts the two rotating metal rollers to start the casting process. Too high or too low aluminum liquid temperature will not only reduce the intrinsic quality of the casting billet, but also easily cause the mold to freeze or leak, causing the production line to stop. Therefore, it is urgent to provide an aluminum liquid temperature control device to improve the temperature control accuracy of the aluminum liquid flowing out of the casting nozzle. Summary of the invention

[0003] In view of the above situation, it is necessary to provide a molten aluminum temperature control device to solve the problem of low control accuracy of the temperature of the molten aluminum flowing out of the casting nozzle.

[0004] An embodiment of the present application provides a molten aluminum temperature control device, which includes a filter box, a flow trough and a front box, wherein the filter box is used to filter the molten aluminum degassed by the degassing box, the flow trough is used to introduce the molten aluminum filtered by the filter box into the front box, and the front box is used to output the molten aluminum for casting. The molten aluminum temperature control device also includes a temperature control mechanism, which includes a first temperature measuring structure and a temperature rising structure. The first temperature measuring structure is arranged in the front box, and is used to measure the temperature of the molten aluminum in the front box. The temperature rising structure is partially arranged in the filter box, and is used to heat the molten aluminum in the filter box. The first temperature measuring structure is electrically connected to the temperature rising structure.

[0005] Between smelting and casting, the aluminum liquid passes through the degassing box and then enters the filter box. The filtered aluminum liquid enters the front box through the flow channel, and then enters the casting nozzle through the front box. When it flows out from the casting nozzle outlet, it immediately contacts the two rotating metal rollers to start the mold casting process. Among them, the flow channel is about two meters long. When the aluminum liquid enters the front box from the filter box, the temperature of the aluminum liquid fluctuates greatly due to the influence of the ambient temperature. The outflow temperature deviation of the aluminum liquid is controlled by monitoring the temperature of the furnace gas and / or aluminum liquid in the filter box. Too high or too low aluminum liquid temperature will reduce the quality of the ingot. By directly monitoring the temperature of the aluminum liquid in the front box, the outflow temperature of the aluminum liquid can be better controlled to improve the quality of the ingot.

[0006] In some embodiments of the present application, the temperature control mechanism further includes a second temperature measuring structure, which is disposed in the filter box and is used to measure the temperature in the filter box.

[0007] The second temperature measuring structure is used to measure the temperature of the furnace gas or aluminum liquid in the filter box. By monitoring the furnace gas temperature in the filter box, the heating structure can be started to quickly heat up according to temperature requirements after the stand plate is shut down.

[0008] The shutdown plate means that the filter box needs to be cleaned and maintained regularly. At this time, the heating needs to be stopped. After the cleaning or maintenance is completed, the filter box needs to be heated up quickly. The furnace gas temperature in the filter box is monitored to control the heating structure to heat or stop heating according to the temperature measurement data and the preset temperature comparison. When the second temperature measurement structure is used to measure the temperature of the aluminum liquid in the filter box, the temperature of the aluminum liquid in the filter box can be dynamically monitored to control the temperature of the aluminum liquid at each node between smelting and casting.

[0009] In some embodiments of the present application, the aluminum liquid temperature control device further includes a control mechanism, and the control mechanism includes a selection switch and a control system. The selection switch is electrically connected to the first temperature measuring structure, the second temperature measuring structure, and the control system to control the first temperature measuring structure or the second temperature measuring structure to be electrically connected to the control system. The control system is electrically connected to the temperature increasing structure.

[0010] In this aluminum liquid temperature control device, the control system receives the temperature signal of the first temperature measuring structure or the second temperature measuring structure, compares it with a given temperature signal, and then outputs a control signal to control the operation of the temperature increasing structure.

[0011] In some embodiments of the present application, the temperature increasing structure includes a power regulator and a heater, the power regulator and the heater are electrically connected, the power regulator is electrically connected to the control system, and the heater is disposed in the filter box.

[0012] In this aluminum liquid temperature control device, the power regulator is electrically connected to the control system, and the heating power of the power regulator is adjustable. The heating power can be adjusted according to the control signal sent by the control system, and the aluminum liquid in the front box is heated by the heater to adjust the temperature of the aluminum liquid in the front box.

[0013] In some embodiments of the present application, the control system includes a temperature recorder and a PID regulation controller. The temperature recorder is used to record the temperature signal transmitted by the first temperature measuring structure or the second temperature measuring structure and convert the temperature signal into a current signal and transmit it to the PID regulation controller. The PID regulation controller is used to control the output power of the power regulator.

[0014] In this aluminum liquid temperature control device, when the first temperature measuring structure is connected to the selection switch, the aluminum liquid temperature signal in the front box is input into the temperature recorder. While the temperature recorder records the temperature signal, it also converts the signal into a 4-20mA current signal and inputs it into the PID adjustment controller. The PID adjustment controller compares the signal with the given temperature signal to generate a temperature deviation, and then performs PID calculation on the deviation to output a 4-20mA control signal to control the heating power of the power regulator, thereby controlling the temperature of the aluminum liquid in the front box. When the deviation is large, the output of the PID adjustment controller is large, and the heating rate of the heater is fast. Conversely, the heating rate of the heater is slow. When the deviation is zero, the heater does not heat. This control system can automatically realize the temperature control of the aluminum liquid in the front box, and the system is stable and reliable.

[0015] In some embodiments of the present application, the first temperature measurement structure and the second temperature measurement structure are nickel-chromium-nickel-aluminum thermocouples.

[0016] The temperature measurement range of nickel-chromium-nickel-aluminum thermocouple is wide, ranging from -200℃ to 1400℃. The temperature of aluminum liquid in the filter box is generally around 750℃, and the temperature of aluminum liquid in the front box is generally required to be around 705℃. In order to improve the quality of the ingot, the aluminum liquid in the front box must be accurately controlled to ensure that it is within ±2℃. The nickel-chromium-nickel-aluminum thermocouple is selected, which is cheap, has high measurement accuracy at a temperature of around 705℃, and is easy to maintain and replace.

[0017] In some embodiments of the present application, the second temperature measuring structure includes a first thermometer, and the first thermometer is arranged above the aluminum liquid line in the filter box.

[0018] In this aluminum liquid temperature control device, the first thermometer is used to measure the temperature of the furnace gas in the filter box. By monitoring the furnace gas temperature in the filter box, the heating structure can be started to quickly heat up according to the temperature demand after the shutdown plate. The shutdown plate means that the filter box needs to be cleaned and maintained regularly, and the heating needs to be stopped at this time. After the cleaning or maintenance is completed, the filter box needs to be quickly heated up. By monitoring the furnace gas temperature in the filter box, the heating structure can be controlled to heat or stop heating according to the comparison between the temperature measurement data and the preset temperature.

[0019] In some embodiments of the present application, the second temperature measuring structure includes a second thermometer, and the second thermometer is arranged below the aluminum liquid line in the filter box.

[0020] The second thermometer is used to measure the temperature of the aluminum liquid in the filter box. By dynamically monitoring the temperature of the aluminum liquid in the filter box, the temperature of the aluminum liquid in each node between smelting and casting and rolling can be controlled.

[0021] Another aspect of the embodiment of the present application provides a method for controlling the temperature of molten aluminum, wherein the temperature control step comprises:

[0022] Preliminary temperature measurement: the aluminum liquid in the filter box enters the front box through the flow channel, and the first temperature measuring structure in the front box measures the first aluminum liquid temperature in the front box, and the first temperature measuring structure sends the first aluminum liquid temperature signal to the control system;

[0023] Temperature control: The control system controls the temperature raising structure in the filter box through the first aluminum liquid temperature signal to control the second aluminum liquid temperature in the filter box.

[0024] In some embodiments of the present application, the temperature control step includes:

[0025] A preset temperature is stored in the control system, and the control system compares the first aluminum liquid temperature with the preset temperature to perform:

[0026] If the temperature of the first aluminum liquid is equal to or higher than the preset temperature, the control system controls the heating structure to stop heating the aluminum liquid in the filter box;

[0027] If the temperature of the first aluminum liquid is lower than the preset temperature, the control system controls the heating structure to heat the aluminum liquid in the filter box.

[0028] This aluminum liquid temperature control method can better control the aluminum liquid temperature in the front box and improve the quality of the casting. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of an aluminum liquid temperature control device in an embodiment of the present application.

[0030] Figure 2 yes Figure 1 Schematic diagram of the structural connection of the Chalco liquid temperature control device.

[0031] Figure 3 yes Figure 1 Temperature measurement flow chart of the Chalco liquid temperature control device.

[0032] Main component symbols

[0033] Aluminum liquid temperature control device 100

[0034] Filter box 10

[0035] Flow channel 11

[0036] Front box 12

[0037] Casting nozzle 13

[0038] Roller 14

[0039] Temperature control mechanism 20

[0040] The first temperature measuring structure 21

[0041] Heating structure 22

[0042] Power Regulator 221

[0043] Heater 222

[0044] The second temperature measurement structure 23

[0045] First Thermometer 231

[0046] Second Thermometer 232

[0047] Control mechanism 30

[0048] Selector switch 31

[0049] Control system 32

[0050] Temperature recorder 321

[0051] PID regulation controller 322

[0052] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0054] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a centrally disposed element at the same time. When an element is considered to be "disposed on" another element, it may be directly disposed on the other element or there may be a centrally disposed element at the same time.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present application belongs. The terms used herein in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0056] An embodiment of the present application provides a molten aluminum temperature control device, which includes a filter box, a flow trough and a front box, wherein the filter box is used to filter the molten aluminum degassed by the degassing box, the flow trough is used to introduce the molten aluminum filtered by the filter box into the front box, and the front box is used to output the molten aluminum for casting. The molten aluminum temperature control device also includes a temperature control mechanism, which includes a first temperature measuring structure and a temperature rising structure. The first temperature measuring structure is arranged in the front box, and is used to measure the temperature of the molten aluminum in the front box. The temperature rising structure is partially arranged in the filter box, and is used to heat the molten aluminum in the filter box. The first temperature measuring structure is electrically connected to the temperature rising structure.

[0057] Between smelting and casting, the aluminum liquid passes through the degassing box and then enters the filter box. The filtered aluminum liquid enters the front box through the flow channel, and then enters the casting nozzle through the front box. When it flows out from the casting nozzle outlet, it immediately contacts the two rotating metal rollers to start the mold casting process. Among them, the flow channel is about two meters long. When the aluminum liquid enters the front box from the filter box, the temperature of the aluminum liquid fluctuates greatly due to the influence of the ambient temperature. The outflow temperature deviation of the aluminum liquid is controlled by monitoring the temperature of the furnace gas and / or aluminum liquid in the filter box. Too high or too low aluminum liquid temperature will reduce the quality of the ingot. By directly monitoring the temperature of the aluminum liquid in the front box, the outflow temperature of the aluminum liquid can be better controlled to improve the quality of the ingot.

[0058] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0059] See also Figure 1 One embodiment of the present application provides an aluminum liquid temperature control device 100 for controlling the temperature of the aluminum liquid in the front box 12 .

[0060] The aluminum liquid temperature control device 100 includes a filter box 10, a flow channel 11 and a front box 12. After passing through the degassing box, the aluminum liquid enters the filter box 10 for filtration. The filtered aluminum liquid enters the front box 12 through the flow channel 11, and then enters the casting nozzle 13 through the front box 12. The casting nozzle 13 introduces the aluminum liquid into a pair of rollers 14, and the aluminum liquid is rolled into an aluminum strip billet through the pair of rollers 14.

[0061] The aluminum liquid temperature control device 100 further includes a temperature control mechanism 20, which includes a first temperature measuring structure 21 and a temperature increasing structure 22. The first temperature measuring structure 21 is disposed in the front box 12 and below the aluminum liquid line, and is used to measure the temperature of the aluminum liquid in the front box 12. The temperature increasing structure 22 is partially disposed in the filter box 10, and is used to heat the aluminum liquid in the filter box 10.

[0062] In other embodiments, the first temperature measuring structure 21 is disposed in the front box 12 and located above the aluminum liquid line, and is used to measure the temperature of the furnace gas in the front box 12 .

[0063] Between smelting and casting, the aluminum liquid passes through the degassing box and enters the filter box 10. The filtered aluminum liquid enters the front box 12 through the flow slot 11, and then enters the casting nozzle 13 through the front box 12. When it flows out from the outlet of the casting nozzle 13, it immediately contacts the two rotating metal rollers 14 to start the casting process. Among them, the length of the flow slot 11 is about two meters. When the aluminum liquid enters the front box 12 from the filter box 10 through the flow slot 11, the temperature of the aluminum liquid fluctuates greatly due to the influence of the ambient temperature. The temperature deviation of the aluminum liquid flowing out of the front box 12 is large when the furnace gas and / or aluminum liquid temperature in the filter box 10 is monitored. Too high or too low aluminum liquid temperature will reduce the quality of the ingot. By directly monitoring the temperature of the aluminum liquid in the front box 12, the temperature of the aluminum liquid in the filter box 10 is adjusted by controlling the heating structure 22 to heat or stop heating according to the temperature of the aluminum liquid in the front box 12. The aluminum liquid temperature in the filter box 10 affects the aluminum liquid temperature in the front box 12, thereby better controlling the aluminum liquid temperature in the front box 12 and improving the quality of the casting.

[0064] In one embodiment, the temperature control mechanism 20 further includes a second temperature measuring structure 23, which is disposed in the filter box 10. The second temperature measuring structure 23 includes a first thermometer 231, which is disposed above the aluminum liquid line in the filter box 10. The first thermometer 231 is used to measure the temperature of the furnace gas in the filter box 10, and the temperature of the furnace gas in the filter box 10 is monitored so that the heating structure 22 can be started to quickly heat up according to the temperature demand after the stand plate is shut down.

[0065] It should be noted that the aluminum liquid line is selected according to actual use. For example, in actual use, if 90% of the space in the filter box 10 is calibrated to store aluminum liquid, and the aluminum liquid exceeds 90% in the filter box 10, it exceeds the warning line, then the aluminum liquid line can be set in the top 10% of the space in the filter box 10.

[0066] The shutdown plate means that the filter box 10 needs to be cleaned and maintained regularly. At this time, the heating needs to be stopped. After the cleaning or maintenance is completed, the filter box 10 needs to be heated up quickly. The furnace gas temperature in the filter box 10 is monitored to control the heating or stopping of the heating structure 22 based on the comparison between the temperature measurement data and the preset temperature.

[0067] In one embodiment, the second temperature measuring structure 23 also includes a second thermometer 232, which is located below the aluminum liquid line in the filter box 10 and is used to measure the temperature of the aluminum liquid in the filter box 10. By dynamically monitoring the temperature of the aluminum liquid in the filter box 10, the temperature of the aluminum liquid in each node between smelting and casting can be controlled.

[0068] Please also see Figure 2In one embodiment, the aluminum liquid temperature control device 100 further includes a control mechanism 30, and the control mechanism 30 includes a selection switch 31 and a control system 32, and the selection switch 31 and the control system 32 are electrically connected. The first temperature measuring structure 21 and the second temperature measuring structure 23 are both electrically connected to the selection switch 31, and are electrically connected to the control system 32 through the selection switch 31 respectively. The heating structure 22 and the control system 32 are electrically connected, and the control system 32 receives the temperature signal of the first temperature measuring structure 21 or the second temperature measuring structure 23, and compares it with the given temperature signal, and then outputs a control signal to control the operation of the heating structure 22. The given temperature signal refers to the temperature signal corresponding to the temperature that the aluminum liquid in the front box 12 should reach in advance, such as the temperature signal corresponding to 705°C.

[0069] When the first temperature measuring structure 21 is electrically connected to the control system 32 through the selection switch 31, the second temperature measuring structure 23 and the control system 32 are in a disconnected state. The first temperature measuring structure 21 measures the temperature of the aluminum liquid in the front box 12 and transmits the temperature signal to the control system 32. The control system 32 receives the temperature signal, compares it with the given temperature signal, and then outputs a control signal to control the temperature raising structure 22 to heat or not heat the aluminum liquid in the filter box 10.

[0070] When the second temperature measuring structure 23 is electrically connected to the control system 32 through the selection switch 31, the first temperature measuring structure 21 and the control system 32 are in a disconnected state. The second temperature measuring structure 23 measures the furnace gas temperature in the filter box 10 and transmits the temperature signal to the control system 32. The control system 32 receives the temperature signal, compares it with the given temperature signal, and then outputs a control signal to control the temperature raising structure 22 to heat the aluminum liquid in the filter box 10.

[0071] It can be understood that the second temperature measuring structure 23 can also measure the temperature of the aluminum liquid in the filter box 10 and transmit the temperature signal to the control system 32. The control system 32 receives the temperature signal, compares it with the given temperature signal, and then outputs a control signal to control the heating structure 22 to heat the aluminum liquid in the filter box 10.

[0072] In one embodiment, the temperature raising structure 22 includes a power regulator 221 and a heater 222. The heater 222 is disposed in the filter box 10 and is used to heat the aluminum liquid in the filter box 10. The power regulator 221 and the heater 222 are electrically connected. The power regulator 221 is electrically connected to the control system 32. The heating power of the power regulator 221 is adjustable. The heating power can be adjusted according to the control signal sent by the control system 32 to adjust the temperature of the aluminum liquid in the front box 12.

[0073] Specifically, the control system 32 includes a temperature recorder 321 and a PID (Regulating Controlling Apparatus) regulating controller 322. The first temperature measuring structure 21 is connected to the selection switch 31, and the temperature signal of the aluminum liquid in the front box 12 is input into the temperature recorder 321. While the temperature recorder 321 records the temperature signal, it also converts the signal into a 4-20 mA current signal and inputs it into the PID regulating controller 322. The PID regulating controller 322 compares the signal with the given temperature signal to generate a temperature deviation, and then performs PID calculation on the deviation to output a 4-20 mA control signal to control the heating power of the power regulator 221, thereby controlling the temperature of the aluminum liquid in the front box 12. When the deviation is large, the output of the PID regulating controller 322 is large, and the heating rate of the heater 222 is fast. On the contrary, the heating rate of the heater 222 is slow. When the deviation is zero, the heater 222 does not heat. This control system 32 can automatically realize the temperature control of the aluminum liquid in the front box 12, and the system is stable and reliable.

[0074] When the second temperature measuring structure 23 is connected to the selection switch 31, the furnace gas temperature signal in the front box 12 is input into the temperature recorder 321. While the temperature recorder 321 records the temperature signal, it also converts the signal into a 4-20mA current signal and inputs it into the PID adjustment controller 322. The PID adjustment controller 322 compares the signal with the given temperature signal to generate a temperature deviation, and then performs PID calculation on the deviation to output a 4-20mA control signal to control the heating power of the power regulator 221, thereby controlling the temperature of the furnace gas in the front box 12. When the deviation is large, the output of the PID regulator is large, and the heating rate of the heater 222 is fast. On the contrary, the heating rate of the heater 222 is slow. When the deviation is zero, the heater 222 does not heat. The control system 32 can automatically control the furnace gas temperature in the front box 12, so that it can quickly heat up when the machine is shut down and the plate is erected.

[0075] In one embodiment, the first temperature measuring structure 21 and the second temperature measuring structure 23 are nickel-chromium-nickel-aluminum, K-type thermocouples, which have a wide temperature measuring range of -200°C to 1400°C. The temperature of the aluminum liquid in the filter box 10 is generally around 750°C, and the temperature of the aluminum liquid in the front box 12 is generally required to be around 705°C. In order to improve the quality of the ingot, the aluminum liquid in the front box 12 must be accurately controlled to ensure that it is within ±2°C. Nickel-chromium-nickel-aluminum, K-type thermocouples are selected, which are cheap, have high measurement accuracy at a temperature of around 705°C, and are easy to maintain and replace.

[0076] In one embodiment, the first temperature measuring structure 21 is arranged in the front box 12. When the first temperature measuring structure 21 is electrically connected to the heating structure 22, it is actually necessary to output aluminum liquid with a temperature of 705°C to the casting nozzle 13. The first temperature measuring structure 21 measures the aluminum liquid temperature to be 700°C. After the aluminum liquid in the filter box 10 is heated by the heating structure 22, the aluminum liquid in the filter box 10 is quickly heated to 715°C. After the heated aluminum liquid in the filter box 10 flows into the front box 12 through the flow channel 11, the temperature is 703°C. At this time, the first temperature measuring structure 21 in the front box 12 feeds back the 703°C temperature signal to the heating structure 22. The heating structure 22 continues to heat the aluminum liquid in the filter box 10 until the aluminum liquid temperature measured by the first temperature measuring structure 21 is close to 705°C. By setting the first temperature measuring structure 21 in the front box 12, the fluctuation range of the aluminum liquid in the front box 12 can be controlled to not exceed ±0.5°C, while the production requires that the temperature fluctuation range of the aluminum liquid in the front box does not exceed the standard value of ±2°C. By setting the first temperature measuring structure 21 in the front box 12, the temperature control requirement can be effectively met.

[0077] In one embodiment, a second temperature measuring structure 23 is disposed in the filter box 10, and the second temperature measuring structure 23 measures the temperature of the aluminum liquid or furnace gas in the filter box 10. When the second temperature measuring structure 23 is electrically connected to the heating structure 22, it is actually necessary to output aluminum liquid with a temperature of 705°C to the casting nozzle 13. When the second temperature measuring structure 23 measures a temperature of 700°C, it is fed back to the heating structure 22 to heat the aluminum liquid in the filter box 10. When the aluminum liquid or furnace gas in the filter box 10 is heated to 705°C, the heated aluminum liquid in the filter box 10 flows into the front box 12 through the flow channel 11. After that, affected by the ambient temperature, the temperature of the aluminum liquid arriving in the front box 12 is 695°C, which is significantly different from 705°C. The production requires that the temperature fluctuation range of the aluminum liquid in the front box does not exceed the standard value ±2°C. If the temperature of the aluminum liquid in the front box 12 is too low, it will affect the quality of the casting.

[0078] Please also see Figure 3 The present application also provides a method for controlling the temperature of molten aluminum, comprising the following steps:

[0079] Preliminary temperature measurement: the aluminum liquid in the filter box 10 enters the front box 12 through the flow channel 11, and the first temperature measuring structure 21 in the front box 12 measures the first aluminum liquid temperature in the front box 12. The first temperature measuring structure 21 and the control system 32 are connected by the selection switch 31, and the first temperature measuring structure 21 sends the first aluminum liquid temperature signal to the control system 32.

[0080] Temperature control: The control system 32 controls the temperature raising structure 22 in the filter box 10 through the first aluminum liquid temperature signal to control the second aluminum liquid temperature in the filter box 10 .

[0081] The preset temperature is stored in the control system 32, and the control system 32 compares the first aluminum liquid temperature with the preset temperature to perform:

[0082] If the temperature of the first aluminum liquid is equal to or higher than the preset temperature, the control system 32 controls the heating structure 22 to stop heating the aluminum liquid in the filter box;

[0083] If the temperature of the first aluminum liquid is lower than the preset temperature, the control system 32 controls the heating structure 22 to heat the aluminum liquid in the filter box 10 .

[0084] This aluminum liquid temperature control method can better control the aluminum liquid temperature in the front box 12 and improve the quality of the casting.

[0085] By connecting the second temperature measuring structure 23 and the control system 32 through the selection switch 31, the aluminum liquid temperature control device 100 can also control the temperature of the furnace gas in the filter box 10, including the following steps:

[0086] Preliminary temperature measurement: the second temperature measuring structure 23 in the filter box 10 measures the furnace gas temperature in the filter box 10 , and the second temperature measuring structure 23 sends the furnace gas temperature signal to the control system 32 .

[0087] Temperature control: The control system 32 controls the temperature raising structure 22 in the filter box 10 through the furnace gas temperature signal to control the furnace gas temperature in the filter box 10 .

[0088] The preset temperature is stored in the control system 32, and the control system 32 compares the furnace gas temperature with the preset temperature to perform:

[0089] If the furnace gas temperature is equal to or higher than the preset temperature, the control system 32 controls the heating structure 22 to stop heating the aluminum liquid in the filter box 10;

[0090] If the furnace gas temperature is lower than the preset temperature, the control system 32 controls the heating structure 22 to heat the aluminum liquid in the filter box 10 .

[0091] This aluminum liquid temperature control method can better control the furnace gas temperature in the filter box 10. By monitoring the furnace gas temperature in the filter box 10, the heating structure 22 can be started to quickly heat up according to temperature requirements after the stand plate is shut down.

[0092] In addition, those skilled in the art may also make other changes within the spirit of the present application. Of course, these changes made according to the spirit of the present application should be included in the scope disclosed in the present application.

Claims

1. A temperature control device for aluminum liquid, comprising a filter box, a flow trough and a front box, wherein the filter box is used to filter the aluminum liquid after degassing by the degassing box, the flow trough is used to guide the aluminum liquid filtered by the filter box into the front box, and the front box is used to output the aluminum liquid for casting and rolling, characterized in that: The aluminum liquid temperature control device also includes a temperature control mechanism, and the temperature control mechanism includes a first temperature measuring structure and a temperature rising structure; The first temperature measuring structure is arranged in the front box and below the aluminum liquid line, and is used to measure the aluminum liquid temperature in the front box; The temperature raising structure is partially arranged in the filter box, and is used to heat the aluminum liquid in the filter box; The first temperature measuring structure is electrically connected to the temperature increasing structure; The temperature control mechanism further includes a second temperature measuring structure, which is arranged in the filter box. The second temperature measuring structure includes a first thermometer, which is arranged above the aluminum liquid line in the filter box. The first thermometer is used to measure the temperature of the furnace gas in the filter box. By monitoring the furnace gas temperature in the filter box, the heating structure can be started to quickly heat up according to the temperature demand after the stand plate is shut down. The second temperature measuring structure further includes a second thermometer, which is located below the aluminum liquid line in the filter box and is used to measure the temperature of the aluminum liquid in the filter box. By dynamically monitoring the temperature of the aluminum liquid in the filter box, the temperature of the aluminum liquid in each node between smelting and casting can be controlled. The first temperature measuring structure and the second temperature measuring structure are nickel-chromium-nickel-aluminum thermocouples; The aluminum liquid temperature control device also includes a control mechanism, which includes a selection switch and a control system, the selection switch is electrically connected to the control system, the first temperature measuring structure and the second temperature measuring structure are both electrically connected to the selection switch, and are electrically connected to the control system through the selection switch respectively, the temperature rising structure is electrically connected to the control system, the control system receives the temperature signal of the first temperature measuring structure or the second temperature measuring structure, compares it with a given temperature signal, and then outputs a control signal to control the operation of the temperature rising structure, the given temperature signal refers to a temperature signal corresponding to the temperature that the aluminum liquid in the front box should reach that is preset; When the first temperature measuring structure is electrically connected to the control system through the selection switch, the second temperature measuring structure and the control system are in a disconnected state, the first temperature measuring structure measures the temperature of the aluminum liquid in the front box, and transmits the temperature signal to the control system, the control system receives the temperature signal, compares it with a given temperature signal, and then outputs a control signal to control the temperature raising structure to heat or not heat the aluminum liquid in the filter box; When the second temperature measuring structure is electrically connected to the control system through the selection switch, the first temperature measuring structure and the control system are in a disconnected state, the second temperature measuring structure measures the furnace gas temperature in the filter box, and transmits the temperature signal to the control system, the control system receives the temperature signal, compares it with the given temperature signal, and then outputs a control signal to control the heating structure to heat the aluminum liquid in the filter box.

2. The aluminum liquid temperature control device according to claim 1, characterized in that: The temperature raising structure comprises a power regulator and a heater, the power regulator and the heater are electrically connected, the power regulator is electrically connected to the control system, and the heater is arranged in the filter box.

3. The aluminum liquid temperature control device according to claim 2, characterized in that: The control system includes a temperature recorder and a PID regulation controller. The temperature recorder is used to record the temperature signal transmitted by the first temperature measuring structure or the second temperature measuring structure and convert the temperature signal into a current signal and transmit it to the PID regulation controller. The PID regulation controller is used to control the output power of the power regulator.

4. A method for controlling the temperature of aluminum liquid, characterized in that: The aluminum liquid temperature control method is implemented by the aluminum liquid temperature control device according to any one of claims 1 to 3, and the aluminum liquid temperature control method comprises: Preliminary temperature measurement: the aluminum liquid in the filter box enters the front box through the flow channel, and the first temperature measuring structure in the front box measures the first aluminum liquid temperature in the front box, and the first temperature measuring structure sends the first aluminum liquid temperature signal to the control system; Temperature control: The control system controls the temperature raising structure in the filter box through the first aluminum liquid temperature signal to control the second aluminum liquid temperature in the filter box.

5. The aluminum liquid temperature control method according to claim 4, characterized in that: The temperature control step comprises: A preset temperature is stored in the control system, and the control system compares the first aluminum liquid temperature with the preset temperature to perform: If the temperature of the first aluminum liquid is equal to or higher than the preset temperature, the control system controls the heating structure to stop heating the aluminum liquid in the filter box; If the temperature of the first aluminum liquid is lower than the preset temperature, the control system controls the heating structure to heat the aluminum liquid in the filter box.

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