Energy-saving lead melting furnace equipment and control method for battery production

Abstract

The present invention discloses an energy-saving lead melting furnace equipment and control method for battery production, which belongs to the technical field of battery production. In the present invention: the equipment includes an upper tank body, a heating tank, etc. The upper tank body has a flange connected to the heating tank, and a residual material detection module is provided on the bottom side, and a vertical heat absorption pipe body, a lead ingot unloading channel and a feeding chamber are provided inside, and a feeding manipulator is provided in the top feeding chamber. The vertical heat absorption pipe body connects the melting chamber and the feeding chamber, and the feeding chamber has a temperature sensing module. There is also a heat recovery component, including a main heat recovery pipe and multiple heat recovery branches, the main heat recovery pipe has an airflow pump, and the branch has an airflow electric control valve. Multiple support components include a telescopic drive and a support frame, the support frame is inserted into the lead ingot unloading channel, the vertical heat absorption pipe body is divided into a preheating isolation area, and the non-uppermost area is connected to the heat recovery branch pipe. The present invention can ensure the continuous input of lead ingots, reduce heat energy loss, and improve the comprehensive utilization rate of heat energy of the lead melting furnace.

Description

Technical Field

[0001] The invention relates to the technical field of battery production, and in particular to energy-saving lead melting furnace equipment and a control method for battery production. Background Art

[0002] In battery production, lead melting furnaces are mainly used to produce lead plates. Lead plates are an important component of batteries. In the production process, the lead needs to be melted and then formed into plates through processes such as casting or coating. In battery production, lead ingot blanks are generally continuously fed into the lead melting furnace. The common way to feed lead ingot blanks is to feed them directly from the top of the towering lead ingot furnace to ensure the stability of the amount of lead ingots in the lead melting furnace. However, this method of feeding will cause a large amount of heat to be directly discharged from the upper opening of the lead ingot furnace, resulting in large heat loss in the lead melting furnace and a large waste of heating electricity.

[0003] One existing method is to install a cover plate on the upper opening of the lead melting furnace, and open the cover plate when feeding lead ingots from the upper opening of the lead melting furnace to reduce heat loss. However, when the cover plate is opened and the lead ingots are fed, a large amount of heat in the furnace will still escape, and the frequency of feeding lead ingots into the lead melting furnace is relatively high. The use of the cover plate method is not ideal for reducing the heat escape from the furnace.

[0004] In summary, how to ensure that the lead smelting furnace is continuously loaded with lead ingots while further reducing the heat energy loss of the lead smelting furnace and achieving the effect of improving the utilization rate of heat energy has become a problem that needs to be solved. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides an energy-saving lead melting furnace equipment and control method for battery production, which not only ensures the continuous input of lead ingots, but also reduces the heat energy loss of the lead melting furnace and improves the comprehensive utilization rate of the heat energy of the lead melting furnace.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention provides an energy-saving lead melting furnace device for battery production. The device comprises a heating tank, which comprises a melting cavity located inside the heating tank, an electromagnetic heating ring for heating the lead ingots in the melting cavity, and a lead liquid discharge channel connected to the bottom of the melting cavity.

[0008] The equipment includes a preheating tank installed above the heating tank through a flange structure, the preheating tube is equipped with an upper tank body, the bottom of the upper tank body is equipped with a residual material detection module for monitoring the amount of lead ingots in the melting chamber, a vertical heat absorbing tube body is installed inside the upper tank body, and a lead ingot unloading channel is located around the vertical heat absorbing tube body, a feeding chamber with an open upper side is opened on the top of the upper tank body, and a feeding manipulator for vertically placing lead ingots into the feeding chamber is arranged above the feeding chamber of the upper tank body. The bottom opening of the vertical heat absorbing tube body is connected to the top area of ​​the melting chamber, and the top opening of the vertical heat absorbing tube body is connected to the bottom area of ​​the feeding chamber. The feeding chamber is equipped with a temperature sensing module.

[0009] The equipment includes a heat recovery component, which is equipped with a main heat recovery pipe with an upper end inserted into the top of the preheating tank and connected to the feed chamber, and a plurality of heat recovery branch pipes independently connected to the main heat recovery pipe, wherein the main heat recovery pipe is equipped with an airflow pump, and each heat recovery branch pipe is independently equipped with an airflow electric control valve.

[0010] The equipment includes multiple support components, each of which is equipped with a telescopic drive and a support frame connected to the output end of the telescopic drive, and the support frame is movably inserted into the lead ingot feeding channel. A preheating partition area separated by multiple support frames is formed in the vertical heat absorption tube body, and the top of the preheating partition area other than the uppermost position is connected to a heat return branch pipe.

[0011] As a preferred technical solution of the device of the present invention: a plurality of round hole slots are opened on the top of the upper tank body, and the upper end of the main heat recovery pipe is inserted in the round hole slot position at the top of the upper tank body. The round hole slot at the non-top of the upper tank body penetrates the vertical heat absorption pipe body, and the heat recovery branch pipe is inserted in the round hole slot position at the non-top of the upper tank body.

[0012] As a preferred technical solution of the device of the present invention: the upper tank body is provided with a plurality of guide grooves, which penetrate the vertical heat absorbing pipe body. The output end of the telescopic drive is connected with a shaft rod, and one end of the shaft rod is fixedly connected with the support frame.

[0013] As a preferred technical solution of the device of the present invention: a side edge groove is arranged on the ring side of the feed cavity at the top of the upper tank body, and the temperature sensor module is installed at the position of the side edge groove.

[0014] As a preferred technical solution of the device of the present invention: the vertical height of the preheating isolation area is greater than the length dimension of the lead ingot.

[0015] As a preferred technical solution of the equipment of the present invention: the telescopic drive is fixedly installed on the outside of the upper tank body, and the support frame is equipped with a plurality of rotating wheels for supporting the lead ingots.

[0016] As a preferred technical solution of the device of the present invention: there is an ascending airflow gap between adjacent wheels of the same support frame for vertical flow of air.

[0017] The present invention provides a control method for energy-saving lead melting furnace equipment for battery production, comprising the following contents:

[0018] S1. The lead melting furnace equipment is started, the feeding robot continuously feeds lead ingots, the residual material detection module monitors that the amount of lead ingots in the melting chamber continues to increase, and the electromagnetic heating coil starts to heat the lead ingots in the melting chamber.

[0019] S2. When the residual material detection module detects that the amount of lead ingots in the melting chamber reaches the maximum reference value preset by the system:

[0020] S2.1. The support assembly at the bottom is started, driving its support frame to extend into the lead ingot feeding channel, and the feeding robot throws a lead ingot into the lead ingot feeding channel.

[0021] S2.2. The support assembly at the upper side is started, driving its support frame to extend into the lead ingot feeding channel, and the feeding robot throws a lead ingot into the lead ingot feeding channel.

[0022] S2.3. Repeat the operation in S2.2 until the topmost support assembly drives its support frame to extend into the lead ingot feeding channel, and the feeding robot puts a lead ingot into the lead ingot feeding channel.

[0023] S3. During the process of continuous heating of the lead ingots in the melting chamber by the electromagnetic heating coil, part of the heat escapes upward and enters the lead ingot feeding channel above, continuously preheating the multiple lead ingots in the lead ingot feeding channel.

[0024] S4. When the residual material detection module detects that the amount of lead ingots in the melting chamber is lower than the maximum reference value preset by the system:

[0025] S4.1. The support assembly at the bottom position is started, driving its support frame to retract and detach from the lead ingot unloading channel, and the lead ingot supported by the bottom support frame falls into the melting chamber.

[0026] S4.2. After the lead ingot supported by the support frame falls into the melting chamber, the support assembly drives the support frame to advance again and extend into the lead ingot unloading channel.

[0027] S4.3. The support components above the bottommost support component complete the retraction and advancement of the support frame one by one from bottom to top.

[0028] S5. The feeding robot replenishes the lead ingots into the lead ingot unloading channel.

[0029] S6. The temperature sensor module monitors the rising air temperature in real time, denoted as T x .

[0030] The system presets n temperature reference values: [T1, T2, T3, ..., T n ], where n is the number of heat recovery branches, T1>T2>T3>...>T n .

[0031] Judge T x With [T1, T2, T3, ..., T n ], if T x ≥T m , then counting from low to high, the air flow electric control valve of the mth heat recovery branch is opened, where T m ∈[T1, T2, T3, ..., T n ].

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. The present invention provides an upper tank body, a vertical heat absorbing pipe body and a lead ingot feeding channel, and uses the vertical heat absorbing pipe body to connect the melting chamber with the feeding chamber, so that part of the heat escaping from the melting chamber can preheat the lead ingots in the lead ingot feeding channel, reducing the heat loss caused by the heat being discharged directly from the upper opening of the furnace. In addition, a heat recovery component is provided, and multiple heat recovery branches can selectively open the airflow electric control valve according to the relationship between the rising airflow temperature monitored by the temperature sensing module and the preset temperature reference value, so that the airflow with the appropriate temperature can flow back to the corresponding position, further improving the utilization rate of heat and reducing heat loss.

[0034] 2. The present invention is equipped with a feeding robot, which can vertically place lead ingots above the feeding chamber to realize automatic feeding of lead ingots. At the same time, multiple support components and their support frames can move in the lead ingot feeding channel. By controlling the telescopic drive of the support component, the lead ingots can be orderly dropped into the melting chamber and new lead ingots can be added, ensuring the continuous feeding of lead ingots.

[0035] 3. The present invention utilizes a preheating and heat recovery system formed by a vertical heat absorbing pipe body and a heat recovery component to recover and reuse the escaped heat, which not only ensures the demand for continuous production of lead ingots, but also effectively reduces the heat energy loss of the lead melting furnace, thereby improving the comprehensive utilization rate of the heat energy of the lead melting furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the overall structure of the lead melting furnace equipment of the present invention.

[0037] Figure 2 It is a schematic diagram of the coordination of the preheating tank, the heat recovery assembly and the support assembly in the present invention.

[0038] Figure 3 It is a structural schematic diagram of the preheating tank in the present invention.

[0039] Figure 4 for Figure 2 A partial enlarged schematic diagram in the middle.

[0040] Figure 5 for Figure 2A partial enlarged schematic diagram of point B in the middle.

[0041] Figure 6 It is a top view of the vertical heat absorption tube body in the present invention.

[0042] Figure 7 It is a top view of the support assembly in the present invention.

[0043] Among them: 1-heating tank, 101-lower tank body, 102-melting chamber, 103-electromagnetic heating coil, 104-lead liquid discharge channel; 2-preheating tank, 201-upper tank body, 202-vertical heat absorption pipe body, 203-lead ingot unloading channel, 2031-preheating isolation area, 204-round hole slot, 205-feeding chamber, 2051-edge groove, 206-residual material detection module, 207-temperature sensor module, 208-guide groove; 3-heat recovery component, 301-main heat recovery pipe, 302-air flow pump, 303-heat recovery branch pipe, 304-air flow electric control valve; 4-feeding manipulator; 5-lead ingot; 6-support component, 601-telescopic drive, 602-shaft rod, 603-support frame, 604-rotor, 605-rising air flow gap. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] Embodiment 1: The present invention designs an energy-saving lead melting furnace equipment for battery production, and the main equipment structure is as follows:

[0046] like Figure 1 Heating tank 1: The heating tank 1 includes a lower tank body 101, which has a melting chamber 102 inside. The melting chamber 102 is used to accommodate lead ingots for melting. An electromagnetic heating coil 103 surrounds the melting chamber 102 to provide a heat source for melting the lead ingots. The bottom of the melting chamber 102 is connected to a lead liquid discharge channel 104, through which the molten lead liquid can be discharged for subsequent battery plate production processes, such as casting or coating.

[0047] like Figure 1 , Figure 3 , Figure 4 , Figure 5 , Figure 6, preheating tank 2 and related components: The main body of the preheating tank 2 is the upper tank body 201, which is installed above the heating tank 1 through a flange structure. A residual material detection module 206 is arranged on its bottom side for real-time monitoring of the amount of lead ingots in the melting chamber 102. A vertical heat-absorbing pipe body 202 and a lead ingot unloading channel 203 are installed in the inner periphery of the upper tank body 201. The bottom opening of the vertical heat-absorbing pipe body 202 is connected to the top area of ​​the melting chamber 102, and the top opening is connected to the bottom area of ​​the feeding chamber 205 to form a heat conduction channel. The lead ingot unloading channel 203 is located in the inner periphery of the vertical heat-absorbing pipe body 202 and is used for the transportation of lead ingots. A feeding chamber 205 is opened at the top of the upper tank body 201, and a feeding manipulator 4 is arranged above the feeding chamber 205 for automatically placing lead ingots vertically into the feeding chamber 205. The feeding chamber 205 is equipped with a temperature sensing module 207 for monitoring the temperature of the rising air flow. The top of the upper tank body 201 is also provided with a plurality of circular hole slots 204, and the circular hole slots 204 not on the top penetrate the vertical heat absorbing pipe body 202 for installing the heat recovery component 3. At the same time, the upper tank body 201 is provided with a plurality of guide grooves 208, which penetrate the vertical heat absorbing pipe body 202 inwardly for guiding the shaft rod 602 and the support frame 603 of the support component 6.

[0048] like Figure 2 , Figure 3 , heat recovery component 3: The heat recovery component 3 includes a main heat recovery pipe 301, an airflow pump 302, a heat recovery branch pipe 303 and an airflow electric control valve 304. The upper end of the main heat recovery pipe 301 is inserted into the top of the preheating tank 2 and communicated with the feed chamber 205. The airflow pump 302 is installed on the main heat recovery pipe 301 to drive the airflow circulation. Multiple heat recovery branch pipes 303 are independently connected to the main heat recovery pipe 301, and each heat recovery branch pipe 303 is equipped with an independent airflow electric control valve 304. The heat recovery branch pipe 303 is inserted according to the position of the round hole slot 204 on the upper tank body 201. The non-top round hole slot 204 corresponds to the installation position of the heat recovery branch pipe 303, so that the heat recovery branch pipe 303 can be connected to the preheating isolation area 2031 in the vertical heat absorption pipe body 202.

[0049] like Figure 2 , Figure 5 , Figure 7, Support assembly 6: Support assembly 6 includes a telescopic driver 601, a shaft 602, a support frame 603 and a rotating wheel 604. The telescopic driver 601 is fixedly mounted on the outside of the upper tank 201, and its output end is connected to the shaft 602, and one end of the shaft 602 is fixedly connected to the support frame 603. The support frame 603 is movably inserted into the lead ingot feeding channel 203, and a plurality of rotating wheels 604 are arranged on the support frame 603 to support the lead ingot 5 and enable it to move smoothly in the lead ingot feeding channel 203. The lead ingot and the support frame 603 are actually in rolling contact. There is an updraft gap 605 between adjacent rotating wheels 604 of the same support frame 603 to ensure that the airflow can flow vertically and realize heat exchange. A preheating partition area 2031 separated by a plurality of support frames 603 is formed in the vertical heat absorption tube body 202. The top of the preheating partition area 2031 other than the uppermost position is connected to a heat recovery branch pipe 303, and the vertical height of the preheating partition area 2031 is greater than the length of the lead ingot 5, ensuring that the lead ingot can be fully preheated in the preheating partition area 2031.

[0050] Embodiment 2: The present invention designs a control method for an energy-saving lead melting furnace device for battery production, and the main method contents are as follows:

[0051] First, the startup and feeding stage:

[0052] After the lead melting furnace equipment is started, the feeding robot 4 starts to continuously feed the lead ingots. The residual material detection module 206 monitors the amount of lead ingots in the melting chamber 102 in real time. As the lead ingots are fed, the amount of lead ingots in the melting chamber 102 continues to increase. When the electromagnetic heating coil 103 receives the start signal, it starts to heat the lead ingots in the melting chamber 102 to gradually melt the lead ingots.

[0053] Then, the lead ingot storage and preheating stage:

[0054] When the residual material detection module 206 detects that the amount of lead ingots in the melting chamber 102 reaches the maximum reference value preset by the system, the support assembly 6 is started. The support assembly 6 at the bottom position is started first, and the telescopic driver 601 drives its support frame 603 to extend into the lead ingot feeding channel 203, and then the feeding manipulator 4 throws a lead ingot into the lead ingot feeding channel 203. Then the support assembly 6 at the upper position is started in turn, and the above actions are repeated until the support assembly 6 at the top position drives its support frame 603 to extend into the lead ingot feeding channel 203, and the feeding manipulator 4 throws the last lead ingot. At this time, the lead ingots in the lead ingot feeding channel 203 are distributed in multiple layers and are separated by multiple support frames 603 in different preheating isolation areas 2031. During the continuous heating process of the lead ingots in the melting chamber 102 by the electromagnetic heating coil 103, part of the heat escapes upward and enters the upper lead ingot feeding channel 203 through the vertical heat absorption tube body 202, and continuously preheats the multiple lead ingots in the lead ingot feeding channel 203.

[0055] Third, the lead ingot falling and replenishment stage:

[0056] When the residual material detection module 206 detects that the amount of lead ingots in the melting chamber 102 is lower than the maximum reference value preset by the system, the bottommost support assembly 6 is started, and the telescopic driver 601 drives its support frame 603 to retract and disengage from the lead ingot unloading channel 203, and the lead ingot supported by the bottommost support frame 603 falls into the melting chamber 102 under the action of gravity. After the lead ingot supported by the support frame 603 falls into the melting chamber 102, the support assembly 6 drives the support frame 603 to advance again and extend into the lead ingot unloading channel 203. Subsequently, the support assembly 6 above the bottommost support assembly 6 completes the retraction and advancement of the support frame 603 one by one from bottom to top, so that the lead ingots originally on each support frame 603 are moved down by one support frame 603 position. In this process, the feeding robot 4 replenishes the lead ingots to the lead ingot unloading channel 203 to ensure that there is always enough lead ingot reserve in the lead ingot unloading channel 203.

[0057] Finally, the heat recovery control stage:

[0058] The temperature sensor module 207 monitors the temperature of the rising airflow in real time, denoted as T x The system presets n temperature reference values: [T1, T2, T3, ..., T n ], where n is the number of heat recovery branches 303, T1>T2>T3>…>T n . Judge T x With [T1, T2, T3, …, T n ], if T x ≥T m , then counting from low to high, the airflow electric control valve 304 of the mth heat recovery branch pipe 303 is opened. For example, if the airflow temperature detected by the temperature sensing module 207 is high, T x ≥T1, the airflow electric control valve 304 of the bottom heat recovery branch pipe 303 is opened to allow the high-temperature airflow to flow back to the bottom preheating isolation area 2031 for heat recovery; if T x ≥T2, the airflow electric control valve 304 of the second heat recovery branch pipe 303 is opened, and so on, so as to selectively return the airflow of suitable temperature to the corresponding position according to the different airflow temperatures, thereby improving the heat utilization rate.

[0059] Through the coordinated work of the above-mentioned equipment structure and control method, the present invention effectively reduces the heat energy loss of the lead melting furnace while ensuring the continuous production of lead ingots, improves the comprehensive utilization rate of the heat energy of the lead melting furnace, and is suitable for related processes such as lead plate manufacturing in battery production.

[0060] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An energy-saving lead melting furnace device for battery production, the device comprising a heating tank (1), the heating tank (1) comprising a melting chamber (102) located inside the heating tank (1), an electromagnetic heating ring (103) for heating the lead ingot in the melting chamber (102), and a lead liquid discharge channel (104) connected to the bottom of the melting chamber (102), characterized in that: The device comprises a preheating tank (2) installed above a heating tank (1) via a flange structure, the preheating tank (2) being provided with an upper tank body (201), a residual material detection module (206) for monitoring the amount of lead ingots in a melting chamber (102) being provided on the bottom side of the upper tank body (201), a vertical heat absorbing pipe body (202) and a lead ingot unloading channel (203) located inside the vertical heat absorbing pipe body (202) being installed inside the upper tank body (201), a feeding chamber (205) with an open upper side opening being provided on the top of the upper tank body (201), and a feeding robot (4) for vertically placing lead ingots into the feeding chamber (205) being provided above the feeding chamber (205) of the upper tank body (201); The bottom opening of the vertical heat absorbing tube body (202) is in communication with the top area of ​​the melting chamber (102), and the top opening of the vertical heat absorbing tube body (202) is in communication with the bottom area of ​​the feeding chamber (205); Wherein, the feed chamber (205) is provided with a temperature sensing module (207) for detecting the temperature of the rising airflow; The device comprises a heat recovery component (3), wherein the heat recovery component (3) is provided with a main heat recovery pipe (301) whose upper end is inserted into the top of a preheating tank (2) and communicated with a feed chamber (205), and a plurality of heat recovery branch pipes (303) independently communicated with the main heat recovery pipe (301), wherein the main heat recovery pipe (301) is provided with an airflow pump (302), and each heat recovery branch pipe (303) is independently provided with an airflow electric control valve (304), and the system presets n temperature reference values ​​that increase in sequence, and each temperature reference value independently controls the opening and closing state of the airflow electric control valve (304) of a heat recovery branch pipe (303), wherein a lower temperature reference value corresponds to an opening and closing state of the airflow electric control valve (304) with a higher control position; The device comprises a plurality of support components (6), wherein the support components (6) are provided with a telescopic drive (601), a support frame (603) connected to an output end of the telescopic drive (601), and the support frame (603) is movably inserted into a lead ingot feeding channel (203); A preheating isolation area (2031) separated by a plurality of support frames (603) is formed in the vertical heat absorption pipe body (202), and the top of the preheating isolation area (2031) other than the uppermost position is connected to a heat return branch pipe (303).

2. The energy-saving lead melting furnace equipment for battery production according to claim 1 is characterized in that: A plurality of circular hole slots (204) are provided on the top of the upper tank body (201), and the upper end of the main heat recovery pipe (301) is inserted into the circular hole slot (204) at the top of the upper tank body (201); The non-top circular hole slot (204) of the upper tank body (201) penetrates the vertical heat absorption pipe body (202), and the heat recovery branch pipe (303) is inserted at the position of the non-top circular hole slot (204) of the upper tank body (201).

3. The energy-saving lead melting furnace equipment for battery production according to claim 1 is characterized in that: The upper tank body (201) is provided with a plurality of guide grooves (208), and the guide grooves (208) penetrate the vertical heat absorption pipe body (202); The output end of the telescopic driver (601) is connected to a shaft rod (602), and one end of the shaft rod (602) is fixedly connected to a support frame (603).

4. The energy-saving lead melting furnace equipment for battery production according to claim 1 is characterized in that: A side groove (2051) is arranged on the ring side of the top feed cavity (205) of the upper tank body (201), and the temperature sensing module (207) is installed at the position of the side groove (2051).

5. The energy-saving lead melting furnace equipment for battery production according to claim 1 is characterized in that: The vertical height of the preheating isolation area (2031) is greater than the length dimension of the lead ingot (5).

6. The energy-saving lead melting furnace equipment for battery production according to claim 1 is characterized in that: The telescopic driver (601) is fixedly mounted on the outside of the upper tank body (201), and the support frame (603) is provided with a plurality of rotating wheels (604) for supporting the lead ingot (5).

7. The energy-saving lead melting furnace equipment for battery production according to claim 6 is characterized in that: There is an ascending airflow gap (605) between adjacent rotating wheels (604) of the same support frame (603) for vertical flow of air.

8. A control method for energy-saving lead melting furnace equipment for battery production, characterized in that: An energy-saving lead melting furnace equipment for battery production according to any one of claims 1 to 7, comprising the following contents: S1. The lead melting furnace equipment is started, the feeding robot (4) continuously feeds lead ingots, the residual material detection module (206) detects that the amount of lead ingots in the melting chamber (102) continues to increase, and the electromagnetic heating coil (103) starts to heat the lead ingots in the melting chamber (102); S2. When the residual material detection module (206) detects that the amount of lead ingots in the melting chamber (102) reaches the maximum reference value preset by the system: S2.

1. The bottommost support assembly (6) is started, driving its support frame (603) to extend into the lead ingot feeding channel (203), and the feeding manipulator (4) feeds a lead ingot into the lead ingot feeding channel (203); S2.

2. The support assembly (6) at the upper position is started, driving its support frame (603) to extend into the lead ingot feeding channel (203), and the feeding manipulator (4) throws a lead ingot into the lead ingot feeding channel (203); S2.

3. Repeat the operation in step S2.2 until the topmost support assembly (6) drives its support frame (603) to extend into the lead ingot feeding channel (203), and the feeding manipulator (4) feeds a lead ingot into the lead ingot feeding channel (203); S3. During the process of the electromagnetic heating coil (103) continuously heating the lead ingots in the melting chamber (102), part of the heat escapes upward and enters the lead ingot feeding channel (203) above, and continuously preheats the multiple lead ingots in the lead ingot feeding channel (203); S4. When the residual material detection module (206) detects that the amount of lead ingots in the melting chamber (102) is lower than the maximum reference value preset by the system: S4.

1. The bottommost support assembly (6) is started, driving its support frame (603) to retract and detach from the lead ingot unloading channel (203), and the lead ingot supported by the bottommost support frame (603) falls into the melting chamber (102); S4.

2. After the lead ingot supported by the support frame (603) falls into the melting chamber (102), the support assembly (6) drives the support frame (603) to be pushed forward again and extend into the lead ingot feeding channel (203); S4.

3. The support assembly (6) above the bottommost support assembly (6) completes the retraction and advancement of the support frame (603) one by one from bottom to top; S5. The feeding robot (4) replenishes the lead ingots into the lead ingot feeding channel (203); S6. The temperature sensor module (207) monitors the temperature of the rising airflow in real time, denoted as T x ; The system presets n temperature reference values: [T1, T2, T3, ..., T n ], where n is the number of heat recovery branches (303), T1>T2>T3>...>T n ; Judge T x With [T1, T2, T3, ..., T n ], if T x ≥T m , counting from low to high, the air flow electric control valve (304) of the mth heat recovery branch pipe (303) is opened, where T m ∈[T1, T2, T3, ..., T n ].

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