Indium ingot casting equipment and cooling method thereof

Abstract

The invention relates to the technical field of waste heat recovery, and discloses indium ingot casting equipment which comprises an air cooler, a casting module used for casting indium ingots and a waste heat recovery module which are sequentially connected, and the temperature in the casting module is jointly adjusted through the air cooler and the waste heat recovery module; the waste heat recovery module comprises a drying box, a drying cavity and a waste heat recovery cavity are formed in the drying box, an exhaust port is formed in the top of the drying box, the drying cavity communicates with the exhaust port, a shutter is arranged between the drying cavity and the waste heat recovery cavity, and the degree of communication between the drying cavity and the waste heat recovery cavity is adjusted through the opening degree of the shutter. The invention further discloses an indium ingot casting cooling method. According to the indium ingot casting cooling method, the cooling rate is jointly controlled through the air cooler and the waste heat recovery module so that air holes can be prevented from being generated during indium ingot casting.

Description

Technical Field

[0001] The present application relates to the field of waste heat recovery technology, and specifically to an indium ingot casting device and a cooling method thereof. Background Art

[0002] In the casting of indium ingots, the indium liquid is poured into the mold and cooled into an indium ingot. During this cooling process, air cooling or water cooling is generally used. The water cooling method uses the flow of water to remove heat for cooling, and the air cooling method uses air exchange to remove heat. When air cooling is used, an air cooler is generally used for cooling, but the hot air during cooling is often discharged without being utilized, resulting in low energy utilization efficiency. Summary of the Invention

[0003] In view of the above problems, the present application provides an indium ingot casting device and a cooling method thereof. The device cools the indium ingot casting through an air cooler, and utilizes the hot air generated after the air cooler cools the casting module through a waste heat recovery module. The hot air will enter the waste heat recovery chamber from the drying chamber through the blinds to dry the material in the waste heat recovery chamber. In this way, the heat after cooling can be utilized to improve the energy utilization efficiency.

[0004] The technical solution of this application is:

[0005] An indium ingot casting device includes a cooling fan, a casting module for casting indium ingots, and a waste heat recovery module connected in sequence. The temperature in the casting module is jointly regulated by the cooling fan and the waste heat recovery module; the waste heat recovery module includes a drying box, a drying cavity and a waste heat recovery cavity are provided in the drying box, an exhaust port is provided on the top of the drying box, the drying cavity is connected to the exhaust port, and a shutter is provided between the drying cavity and the waste heat recovery cavity. The shutter adjusts the degree of connectivity between the drying cavity and the waste heat recovery cavity by opening.

[0006] Preferably, a U-shaped hot air duct is provided between the casting module and the waste heat recovery module, an exhaust fan is provided in the middle of the hot air duct, and a regulating valve is provided between the casting module and the hot air duct.

[0007] Preferably, the waste heat recovery module is provided with an adjustment handle for adjusting the opening of the shutters, and the adjustment handle is located on the side of the waste heat recovery module.

[0008] Preferably, the casting module includes a casting chamber and a conveying unit. The conveying unit is located in the casting chamber. A casting port is provided on the top of the casting chamber, and the casting port is located at one end close to the hot air duct. An indium ingot mold is provided on the conveying unit. The casting port is used to cast the indium liquid into the indium ingot mold. A discharge port is provided at the bottom of the casting chamber, and the discharge port is located at one end of the casting chamber away from the casting port. The conveying unit is used to convey the cooled indium ingot to the discharge port for discharge outward. Pneumatic switches are provided on both the casting port and the discharge port.

[0009] Preferably, a reversing valve is provided on the waste heat recovery chamber, and the reversing valve is used to adjust whether the exhaust port is connected to the waste heat recovery chamber or to the drying chamber. The reversing valve is provided with a reversing handle for controlling the connection direction.

[0010] Preferably, a material tray for carrying materials and a placement rack for placing the material tray are provided in the waste heat recovery chamber.

[0011] Preferably, the drying chamber is provided with an openable door.

[0012] A cooling method for indium ingot casting, the cooling method involving the above-mentioned indium ingot casting equipment, wherein after indium liquid is cast into a casting module, when the temperature inside the casting module is higher than 200°C, a cooling fan is operated at a set parameter of 25-30°C, and at the same time, the opening of the shutter is adjusted to 40-50%, the exhaust fan is turned off, and the opening of the regulating valve is adjusted to 40-50%;

[0013] Preferably, the setting parameters of the air cooler can be selected as 25°C, 26°C, 27°C, 28°C, 29°C, and 30°C; more preferably, the setting parameters of the air cooler can also be selected as 26°C, 27°C, 28°C, and 29°C;

[0014] Preferably, the opening of the blinds can be selected as 42%, 44%, 46%, 48%, or 50%; more preferably, the opening of the blinds can be selected as 44%, 46%, or 48%;

[0015] Preferably, the opening of the regulating valve can be selected as 40%, 42%, 44%, 46%, 48%, or 50%; more preferably, the opening of the regulating valve can be selected as 42%, 44%, or 46%.

[0016] Preferably, when the temperature in the casting module is lower than 200°C, the cooling fan is operated at a setting parameter of 16-20°C, and the opening of the shutter is adjusted to 85-100%;

[0017] Preferably, the setting parameters of the air cooler can be selected as 16°C, 17°C, 18°C, 19°C, and 20°C; more preferably, the setting parameters of the air cooler can also be selected as 17°C, 18°C, and 19°C;

[0018] Preferably, the opening degree of the shutters can be selected as 85%, 90%, 95%, or 100%; more preferably, the opening degree of the shutters can be selected as 90% or 95%.

[0019] One of the above technical solutions of this application has at least one of the following advantages or beneficial effects:

[0020] The present application uses an air cooler to cool the indium ingot casting, and uses the hot air generated after the air cooler cools the casting module through the waste heat recovery module. The hot air will enter the waste heat recovery chamber from the drying chamber through the louver to dry the material in the waste heat recovery chamber. In this way, the heat after cooling can be utilized to improve the energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of this application;

[0022] Figure 2 This is a structural diagram of the waste heat recovery module of this application.

[0023] Among them, the figure markings of each drawing are as follows: 1. Cooling air blower; 2. Casting module; 3. Waste heat recovery module; 4. Hot air duct; 5. Control valve; 21. Casting chamber; 22. Conveying unit; 23. Pneumatic switch; 31. Drying chamber; 32. Waste heat recovery chamber; 33. Shutter; 34. Adjusting handle; 35. Reversing valve; 36. Material tray; 37. Placement rack; 38. Box door; 41. Exhaust fan; 211. Casting port; 212. Discharge port; 221. Indium ingot mold; 311. Exhaust port. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0025] Example 1

[0026] First, the equipment of the present application is explained. Specifically, an indium ingot casting equipment includes a casting chamber 21 and a conveying mechanism, wherein the casting port 211 of the casting chamber 21 is located at the top of the casting chamber 21 and at the starting end of the conveying direction of the conveying mechanism, and the discharge port 212 of the casting chamber 21 is located at the bottom of the casting chamber 21 and at the other end away from the casting port 211. The casting port 211 and the discharge port 212 are pneumatically controlled to switch, and an indium ingot mold 221 is provided on the conveying mechanism. More specifically, indium liquid is cast into the indium ingot mold 221 through the casting port 211, and after cooling is completed, it is conveyed to the discharge port 212 to discharge the cooled indium ingot outward.

[0027] See also Figures 1-2 , an indium ingot casting device, the casting device includes a cooling fan 1, a casting module 2 for casting indium ingots and a waste heat recovery module 3 connected in sequence, and the temperature in the casting module 2 is jointly adjusted by the cooling fan 1 and the waste heat recovery module 3;

[0028] The waste heat recovery module 3 includes a drying box, which is provided with a drying chamber and a waste heat recovery chamber 32. An exhaust port 311 is provided on the top of the drying box, and the drying chamber is connected to the exhaust port 311. A shutter 33 is provided between the drying chamber and the waste heat recovery chamber 32. The shutter 33 adjusts the degree of connection between the drying chamber and the waste heat recovery chamber 32 by opening.

[0029] In actual application, the casting module 2 forms an indium ingot by casting indium liquid into a mold of the indium ingot and cooling it, and the cold air from the air cooler 1 passes through the casting module 2 and exchanges heat in the casting module 2 before entering the drying chamber 31. Since the temperature of the gas after heat exchange will rise, the wind in the drying chamber 31 is hot air, and the hot air circulates through the shutters 33 between the drying chamber 31 and the waste heat recovery chamber 32, so that it can enter the waste heat recovery chamber 32 from the drying chamber 31. It should be noted that the waste heat recovery chamber 32 is provided with materials to be dried, and the hot air entering the waste heat recovery chamber 32 from the drying chamber 31 can dry the materials in the waste heat recovery chamber 32, and the drying chamber is connected to the exhaust port 311 so that the hot air can be discharged outward from the exhaust port 311, thereby avoiding the continuous increase in air pressure in the casting module 2 and the drying box due to the continuous cooling of the air cooler 1, which causes safety problems.

[0030] A U-shaped hot air duct 4 is provided between the casting module 2 and the waste heat recovery module 3 , an exhaust fan 41 is provided in the middle of the hot air duct 4 , and a regulating valve 5 is provided between the casting module 2 and the hot air duct 4 .

[0031] In the above design, the hot air duct 4 can guide the airflow in the casting module 2 into the waste heat recovery chamber 32, thereby drying the material in the waste heat recovery chamber 32. On the other hand, the hot air discharged from the casting module 2 can be discharged into the drying box through the exhaust fan 41 to improve the flow efficiency of the gas. When the temperature in the casting module 2 is higher than 200°C, the exhaust fan 41 needs to be turned off so that the hot air is not easily discharged. It can also contact with the gas in the casting module 2 to generate heat transfer, so that the cooling rate in the casting module 2 is further reduced, thereby further avoiding the generation of pores in the indium ingot. Specifically, two guide plates can be set at the hot air duct 4 to improve the flow effect of the airflow.

[0032] It should be noted that when the temperature inside the casting module 2 is lower than 200°C, the opening of the regulating valve 5 is 100%. When the temperature inside the casting module 2 is higher than 200°C, the opening of the regulating valve 5 can be reduced to reduce the flow rate of the airflow discharged outward from the casting module 2, so that the airflow stays in the casting module 2 for a longer time, and the overall gas ventilation rate in the casting module 2 is reduced, so that the gas temperature in the casting module 2 is higher, that is, the cooling rate is reduced, thereby avoiding the formation of pores in the indium ingot.

[0033] Preferably, the waste heat recovery module 3 is provided with an adjustment handle 34 for adjusting the opening of the shutter 33 , and the adjustment handle 34 is located on the side of the waste heat recovery module 3 .

[0034] In the above design, the opening of the shutter 33 can be adjusted by adjusting the handle 34 , which makes it convenient for the staff to operate the opening of the shutter 33 .

[0035] Preferably, the casting module 2 includes a casting chamber 21 and a conveying unit 22. The conveying unit 22 is located in the casting chamber 21. A casting port 211 is provided at the top of the casting chamber 21. The casting port 211 is located at one end close to the hot air duct 4. An indium ingot mold 221 is provided on the conveying unit 22. The casting port 211 is used to cast the indium liquid into the indium ingot mold 221. A discharge port 212 is provided at the bottom of the casting chamber 21. The discharge port 212 is located at one end of the casting chamber 21 away from the casting port 211. The conveying unit 22 is used to convey the cooled indium ingot to the discharge port 212 for discharge outward. Both the casting port 211 and the discharge port 212 are provided with a pneumatic switch 23.

[0036] Through the above design, the indium liquid enters the casting chamber 21 through the casting port 211. During casting, the pneumatic switch 23 is in the open state; when casting is completed, the pneumatic switch 23 is in the closed state, thereby preventing the cold air of the air cooler 1 from being discharged from the casting chamber 21 to the outside and reducing the cooling rate. Specifically, the conveying method of the conveying unit 22 is to advance the molds one by one. When the mold located below the casting port 211 completes one casting, the conveying unit 22 conveys the next mold to the bottom of the casting port 211. Specifically, when all the molds located below the casting port 211 of the conveying unit 22 have completed casting, but the mold located at the other end of the casting port 211 has not yet cooled down, the conveying unit 22 is turned off until the indium ingot in the mold is cooled down. Only then will the next round of casting be carried out. On the other hand, when the indium ingot has finished cooling, the conveying unit 22 will operate and convey the mold located directly above the discharge port 212. At this time, the opening direction of the mold changes from upward to downward, and the indium ingot in the mold is separated from the mold by its own weight and falls above the discharge port 212. At this time, the pneumatic switch 23 of the discharge port 212 is opened to discharge the indium ingot on the discharge port 212 outward. In other states, the pneumatic switch 23 of the discharge port 212 is in the closed state, thereby preventing the cold air blown by the cold air blower 1 into the casting chamber 21 from being discharged outward from the discharge port 212, thereby reducing the cooling rate. The cooling rate in the casting chamber 21 can be guaranteed by the pneumatic switches 23 of the casting port 211 and the discharge port 212.

[0037] Preferably, a reversing valve 35 is provided on the waste heat recovery chamber 32 , and the reversing valve 35 is used to adjust whether the exhaust port 311 is connected to the waste heat recovery chamber 32 or to the drying chamber. The reversing valve 35 is provided with a reversing handle for controlling the connection direction.

[0038] In the above design, the staff can control the flow direction of the gas by adjusting the reversing handle, so that the exhaust port 311 and the waste heat recovery chamber 32 are connected. In this way, the gas in the drying chamber 31 can enter the waste heat recovery chamber 32 from the shutter 33 to dry the material, and be discharged from the exhaust port 311. In this state, it can be ensured that the gas can enter the waste heat recovery chamber 32 to dry the material, and the flow of the gas can also be controlled by controlling the opening of the shutter 33. When the opening of the shutter 33 is adjusted to a larger degree, the flow of the gas is accelerated and the cooling rate is accelerated; when the opening of the shutter 33 is adjusted to a smaller degree, the flow of the gas is slowed down and the cooling rate is slowed down. When the reversing valve 35 connects the exhaust port 311 and the drying chamber, the gas in the drying chamber 31 can enter the waste heat recovery chamber 32 from the louver 33 or be discharged outward from the exhaust port 311. In this state, the flow of gas can be accelerated, thereby improving the cooling efficiency. When the temperature of the casting module 2 is lower than 200°C, the reversing valve 35 is in a state of connecting the drying chamber 31 and the exhaust port 311, thereby further improving the cooling rate; when the temperature of the casting module 2 is higher than 200°C, the reversing valve 35 is in a state of connecting the waste heat recovery chamber 32 and the exhaust port 311, thereby the cooling rate can be jointly controlled by the louver 33 to further reduce the cooling rate.

[0039] Preferably, a material tray 36 for carrying materials and a placement rack 37 for placing the material tray 36 are provided in the waste heat recovery cavity 32 .

[0040] Through the above design, the material tray 36 can be used to place materials that need to be dried. Specifically, through the placement rack 37, the staff can place the material tray 36 on the placement rack 37, and can also take the material tray 36 out from the placement rack 37, which is more convenient for the staff to operate.

[0041] Preferably, the drying chamber is provided with an openable door 38 .

[0042] In the above design, the staff can replace the material that needs to be dried through the box door 38.

[0043] The cooling method for casting indium ingots includes: after casting the indium liquid into the casting module 2, when the temperature inside the casting module 2 is higher than 200°C, the air cooler 1 is operated with a set parameter of 25-30°C, and at the same time, the opening of the shutter 33 is adjusted to 40-50%, the exhaust fan is turned off, and the opening of the regulating valve is adjusted to 40-50%.

[0044] Preferably, when the temperature in the casting module 2 is lower than 200° C., the air cooler 1 is operated at a setting parameter of 16-20° C., and the opening of the shutter 33 is adjusted to 85-100%.

[0045] Preferably, when the temperature inside the casting module 2 is higher than 200°C, the setting parameters of the air cooler 1 can be selected as 25°C, 26°C, 27°C, 28°C, 29°C, 30°C; more preferably, the setting parameters of the air cooler 1 can also be selected as 26°C, 27°C, 28°C, 29°C; preferably, the opening of the shutters 33 can be selected as 42%, 44%, 46%, 48%, 50%; more preferably, the opening of the shutters 33 can also be selected as 44%, 46%, 48%; preferably, the opening of the regulating valve can be selected as 40%, 42%, 44%, 46%, 48%, 50%; more preferably, the opening of the regulating valve can be selected as 42%, 44%, 46%.

[0046] Preferably, when the temperature inside the casting module 2 is lower than 200°C, the setting parameters of the air cooler 1 can be selected as 16°C, 17°C, 18°C, 19°C, 20°C; more preferably, the setting parameters of the air cooler 1 can also be selected as 17°C, 18°C, 19°C; preferably, the opening of the shutters 33 can be selected as 85%, 90%, 95%, 100%; more preferably, the opening of the shutters 33 can also be selected as 90%, 95%.

[0047] Through the above design, when the temperature inside the casting module 2 exceeds 200°C, the set temperature parameters of the cooling fan 1 and the opening of the shutter 33 are synchronously controlled to reduce the cooling rate. This is because when the casting module 2 is cooled at a cooling rate that keeps the temperature inside the casting module 2 below 200°C and the temperature is higher than 200°C, we found that the indium ingot will have the undesirable phenomenon of air holes. After reducing the cooling rate, the undesirable phenomenon of air holes is alleviated. Therefore, reducing the cooling rate by controlling the temperature setting parameters of the cooling fan 1 and the opening of the shutter 33 can reduce the air holes in the indium ingot during the casting process, thereby improving the quality of the indium ingot. On the other hand, since the cooling fan 1 exchanges heat through the casting module 2, the hot air with heat will enter the waste heat recovery cavity 32 to dry the material, thereby improving the energy utilization rate.

[0048] Example 2

[0049] A cooling method for casting an indium ingot, using the casting equipment of Example 1;

[0050] Specifically, in this embodiment, when the temperature of the casting module 2 is higher than 200°C, the air cooler 1 operates with a temperature setting parameter of 25°C, and the reversing valve 35 is adjusted to connect the exhaust port 311 with the waste heat recovery chamber 32. At the same time, the opening of the shutter 33 is adjusted to 40%, and the exhaust fan 41 is closed, and the opening of the regulating valve 5 is adjusted to 40%; when the temperature of the casting module 2 is lower than 200°C, the air cooler 1 operates with a setting parameter of 16°C, and the reversing valve 35 is adjusted to connect the exhaust port 311 with the drying chamber 31. At the same time, the opening of the shutter 33 is adjusted to 85%, the exhaust fan 41 is opened, and the opening of the regulating valve 5 is adjusted to 80%.

[0051] Example 3

[0052] It is basically the same as Example 2, except that:

[0053] In this embodiment, when the temperature of the casting module 2 is higher than 200°C, the air cooler 1 operates with a temperature setting parameter of 30°C, and the reversing valve 35 is adjusted to connect the exhaust port 311 with the waste heat recovery chamber 32. At the same time, the opening of the shutter 33 is adjusted to 50%, and the exhaust fan 41 is closed, and the opening of the regulating valve 5 is adjusted to 50%; when the temperature of the casting module 2 is lower than 200°C, the air cooler 1 operates with a setting parameter of 20°C, and the reversing valve 35 is adjusted to connect the exhaust port 311 with the drying chamber 31. At the same time, the opening of the shutter 33 is adjusted to 100%, the exhaust fan 41 is opened, and the opening of the regulating valve 5 is adjusted to 100%.

[0054] Example 4

[0055] It is basically the same as Example 2, except that:

[0056] In this embodiment, when the temperature of the casting module 2 is higher than 200°C, the air cooler 1 operates with a temperature setting parameter of 27°C, and the reversing valve 35 is adjusted to connect the exhaust port 311 with the waste heat recovery chamber 32. At the same time, the opening of the shutter 33 is adjusted to 45%, and the exhaust fan 41 is closed, and the opening of the regulating valve 5 is adjusted to 45%; when the temperature of the casting module 2 is lower than 200°C, the air cooler 1 operates with a setting parameter of 18°C, and the reversing valve 35 is adjusted to connect the exhaust port 311 with the drying chamber 31. At the same time, the opening of the shutter 33 is adjusted to 90%, the exhaust fan 41 is opened, and the opening of the regulating valve 5 is adjusted to 90%.

[0057] Comparative Example 1

[0058] This comparative example 1 is basically the same as Example 2, except that:

[0059] In this comparative example, the air cooler 1 always operates at a temperature setting parameter of 15°C, the reversing valve 35 is adjusted to connect the exhaust port 311 with the drying chamber 31, the opening of the shutter 33 is 100%, the exhaust fan 41 is turned on, and the opening of the regulating valve 5 is adjusted to 100%.

[0060] Comparative Example 2

[0061] This comparative example 2 is basically the same as comparative example 1, except that:

[0062] In this comparative example, the air cooler 1 always operates at the set parameters of 31°C, and the reversing valve 35 is adjusted to connect with the exhaust port 311 and the waste heat recovery chamber 32. At the same time, the opening of the shutter 33 is 100%, and the exhaust fan 41 is turned on, and the opening of the regulating valve 5 is adjusted to 100%.

[0063] In order to further reflect the advantages of the present application, the present application adopts the casting and cooling methods of Examples 2 to 4 and Comparative Examples 1 to 2 to cast indium ingots. The number of pores and the cooling time of the indium ingots after casting are shown in Table 1. It should be noted that the number of pores is confirmed by observing the number of bubble holes generated on the surface of the indium ingots after casting five indium ingots, and the cooling time refers to the time from the completion of cooling of the indium ingot to the discharge of the material.

[0064] Table 1 Detailed list of the number of pores and cooling time of the indium ingots of each embodiment and comparative example

[0065] Number of pores in indium ingot Cooling time Example 2 0 180mim Example 3 0 190mim Example 4 0 170mim Comparative Example 1 10-15 120mim Comparative Example 2 2 to 5 150mim

[0066] Result analysis:

[0067] 1. It can be seen from Examples 2, 3, and 4 that when the temperature in the casting chamber 21 is higher than 200°C, the cooling rate is controlled by increasing the temperature setting parameters of the cooling fan 1, adjusting the connectivity of the reversing valve 35, and adjusting the opening of the shutter 33, thereby reducing the cooling rate. It can be observed that no pores exist on the surface of the cooled indium ingot, thereby improving the quality. However, the cooling time is optimal in Example 4. Therefore, under the premise of ensuring that no pores are generated in the indium ingot, the temperature setting parameters and the opening adjustment of the shutter 33 in Example 4 have the highest cooling efficiency.

[0068] 2. It can be seen from Example 2 and Comparative Example 1 that although Comparative Example 1 adopts the same cooling rate for cooling regardless of whether the temperature in the casting chamber 21 is higher than 200°C, and the temperature setting parameter of the air cooler 1 is low, which greatly reduces the cooling time, the frequency of indium liquid casting increases due to the reduction in cooling time. The temperature in the casting chamber 21 rises with each casting. Therefore, when the temperature in the casting chamber 21 exceeds 200°C, when cooling is still performed at the cooling rate, 10 to 15 pores can be observed on the surface of the indium ingot prepared in this case. Although the cooling efficiency is improved, the quality of the indium ingot is reduced.

[0069] 3. It can be seen from Comparative Examples 1 and 2 that when the same cooling rate is used for cooling regardless of whether the temperature in the casting chamber 21 is higher than 200°C, the higher the temperature setting parameter of the air cooler 1, the longer the cooling time. Therefore, the frequency of indium liquid casting is relatively not as high as in Comparative Example 1, which leads to the temperature in the casting chamber 21 not rising as fast as in Comparative Example 1. Therefore, the time that the temperature in the casting chamber 21 exceeds 200°C is not as long as in Comparative Example 2. Therefore, correspondingly, fewer pores are generated on the surface of the indium ingot.

[0070] 4. It can be seen from Example 2, Comparative Example 1, and Comparative Example 2 that the exhaust fan 41 of Comparative Example 1 and Comparative Example 2 is always in the open state, so the gas flow in Comparative Example 1 and Comparative Example 2 is faster, thereby accelerating the cooling rate. Therefore, although the temperature setting parameter of the air cooler 1 in Comparative Example 2 is higher than that in Example 2, the cooling rate is faster than that in Example 2, and the cooling time used is shorter. Therefore, when the temperature in the casting chamber 21 exceeds 200°C, cooling the indium ingot using the cooling method of Comparative Example 2 will also cause pores to form on the surface of the indium ingot.

[0071] In summary, the temperature in the casting chamber 21 is related to the frequency of casting, the temperature setting parameters of the air cooler 1, the opening and closing status of the exhaust fan 41, and the opening of the reversing valve 35 and the shutter 33. Specifically, when the cooling rate is too fast, the frequency of casting will be accelerated, which will cause the temperature in the casting chamber 21 to exceed 200°C more easily. In this case, the cooling of the indium ingot will cause the problem of pores. On the other hand, when the temperature in the casting chamber 21 exceeds 200°C, by increasing the temperature setting parameters of the air cooler 1, the reversing valve 35 is adjusted to connect the waste heat recovery chamber with the exhaust port, and the opening of the shutter 33 is adjusted to reduce the gas flow rate and the cooling rate. Although the cooling time is increased, the surface of the indium ingot no longer produces the problem of pores, thereby improving the quality of the indium ingot. On the other hand, the heat of the hot air can also be used to dry the material, thereby improving the energy utilization efficiency.

[0072] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. An indium ingot casting device, characterized in that: It includes a cooling fan, a casting module for casting indium ingots and a waste heat recovery module connected in sequence, and the temperature in the casting module is jointly adjusted by the cooling fan and the waste heat recovery module; The waste heat recovery module includes a drying box, which is provided with a drying cavity and a waste heat recovery cavity. An exhaust port is provided on the top of the drying box, and the drying cavity is connected to the exhaust port. A shutter is provided between the drying cavity and the waste heat recovery cavity, and the shutter adjusts the degree of connectivity between the drying cavity and the waste heat recovery cavity by opening.

2. The indium ingot casting equipment according to claim 1, characterized in that: A U-shaped hot air duct is provided between the casting module and the waste heat recovery module, an exhaust fan is provided in the middle of the hot air duct, and a regulating valve is provided between the casting module and the hot air duct.

3. The indium ingot casting equipment according to claim 1, characterized in that: The waste heat recovery module is provided with an adjustment handle for adjusting the opening of the shutter, and the adjustment handle is located on the side of the waste heat recovery module.

4. The indium ingot casting equipment according to claim 2, characterized in that: The casting module includes a casting chamber and a conveying unit. The conveying unit is located in the casting chamber. A casting port is provided on the top of the casting chamber. The casting port is located at one end close to the hot air duct. An indium ingot mold is provided on the conveying unit. The casting port is used to cast the indium liquid into the indium ingot mold. A discharge port is provided at the bottom of the casting chamber. The discharge port is located at one end of the casting chamber away from the casting port. The conveying unit is used to transport the cooled indium ingot to the discharge port for discharge. Both the casting port and the discharge port are provided with pneumatic switches.

5. The indium ingot casting equipment according to claim 1, characterized in that: The waste heat recovery chamber is provided with a reversing valve, which is used to adjust whether the exhaust port is connected to the waste heat recovery chamber or to the drying chamber. The reversing valve is provided with a reversing handle for controlling the connection direction.

6. The indium ingot casting equipment according to claim 1, characterized in that: A material tray for carrying materials and a placement rack for placing the material tray are provided in the waste heat recovery chamber.

7. The indium ingot casting equipment according to claim 1, characterized in that: The drying chamber is provided with an openable door.

8. A cooling method for casting an indium ingot, characterized in that: The cooling method relates to the indium ingot casting equipment as described in any one of claims 1 to 7 above. After the indium liquid is cast into the casting module, when the temperature inside the casting module is higher than 200°C, the cooling fan is operated with a set parameter of 25 to 30°C, and at the same time, the opening of the shutter is adjusted to 40 to 50%, the exhaust fan is turned off, and the opening of the regulating valve is adjusted to 40 to 50%.

9. The cooling method for indium ingot casting according to claim 8, characterized in that: When the temperature in the casting module is lower than 200° C., the cooling fan is operated at a setting parameter of 16-20° C., and the opening of the shutter is adjusted to 85-100%.

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