A high-efficiency smelting and casting system for the production of various copper and copper alloy ingots.

Abstract

This utility model discloses a high-efficiency smelting and casting system for producing various copper and copper alloy ingots. It includes a gas-fired vertical shaft furnace mounted on an operating platform. A furnace feeding device is located on the side of the furnace. An induction furnace and a vertical semi-continuous casting machine are located on the side of the operating platform furthest from the furnace feeding device. The operating platform also includes a transfer channel and a distribution channel connecting the gas-fired vertical shaft furnace and the induction furnace. By using a high-thermal-efficiency gas-fired vertical shaft furnace as the smelting equipment, the most energy-intensive melting stage is replaced. Only the induction furnace is used for refining and heat preservation at the rear end, resulting in significantly lower overall energy consumption than traditional solutions that use induction furnaces throughout the entire process. Through modular design, different types and quantities of induction furnaces can be flexibly selected according to different products. A single system can efficiently produce a variety of products, from ordinary copper and brass to oxygen-free copper, high-copper alloys, bronze, and cupronickel, breaking the limitation of gas-fired vertical shaft furnaces being able to produce only a single product.

Description

Technical Field

[0001] This utility model relates to the field of copper and copper alloy ingot production technology, specifically to a high-efficiency smelting and casting system for the production of different copper and copper alloy ingots. Background Technology

[0002] Currently, the production of copper and copper alloy ingots both domestically and internationally mainly relies on induction furnaces (including cored and coreless induction furnaces) as the core equipment for smelting and holding. Induction furnace smelting technology is mature, produces high-quality melts, and offers flexible equipment configuration, effectively handling operations such as slag removal, temperature adjustment, composition adjustment, and casting. However, it also has significant drawbacks: First, the smelting energy consumption of induction furnaces, especially coreless induction furnaces, is extremely high (approximately 320~420 kW·h / t), resulting in persistently high production costs; second, due to the limited melting capacity of a single furnace, multiple furnace groups are often required to achieve large-scale production, which not only significantly increases the equipment footprint but also leads to substantial initial investment costs.

[0003] Gas-fired vertical shaft furnaces are another type of copper smelting equipment. They employ a counter-current heat exchange principle and boast significant advantages such as high thermal efficiency (over 70%), low energy consumption (approximately 32 m³ / t of natural gas), and large single-unit capacity (over 300,000 tons / year). However, their production process involves continuous melting and tapping of copper, with no molten pool inside the furnace to store the melt. Therefore, essential refining operations such as slag removal, composition adjustment, temperature regulation, and settling cannot be performed. This limitation has historically restricted their application to the simple production process of low-oxygen copper rods, making them unsuitable for the production of diverse copper and copper alloy ingots with complex process requirements. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide an efficient smelting and casting system for the production of different copper and copper alloy ingots. It uses a high thermal efficiency gas vertical furnace as the smelting equipment, replacing the melting stage which has the highest energy consumption. Only the induction furnace is used at the back end for refining and heat preservation. The overall energy consumption is much lower than the traditional solution that uses an induction furnace throughout the entire process, which can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high-efficiency smelting and casting system for the production of different copper and copper alloy ingots, comprising a gas-fired vertical furnace set on an operating platform, a furnace feeding device set on the side of the gas-fired vertical furnace, an induction furnace and a vertical semi-continuous casting machine set on the side of the operating platform away from the furnace feeding device, and a transfer channel and a distribution channel set on the operating platform for connecting the gas-fired vertical furnace and the induction furnace.

[0006] In a preferred embodiment of this invention, the transfer channel and the distribution channel are connected, and the number of distribution channels is an even number.

[0007] As a preferred embodiment of this utility model, the transfer channel and the distribution channel are provided with a drain port that communicates with the pouring ladle or the accident pit.

[0008] As a preferred technical solution of this utility model, the induction furnace is selected as either a cored induction furnace or a coreless induction furnace depending on the type of alloy produced.

[0009] As a preferred technical solution of this utility model, the operating platform is also equipped with an induction furnace feeding trolley.

[0010] As a preferred embodiment of this utility model, an induction casting furnace is further provided between the induction furnace and the vertical semi-continuous casting machine, and the induction casting furnace is set on the casting furnace operating platform.

[0011] As a preferred technical solution of this utility model, the number of induction furnaces is two, four or six, which alternately receive copper liquid provided by gas-fired vertical furnaces, and are equipped with a corresponding number of vertical semi-continuous casting machines.

[0012] Compared with existing technologies, the advantages of this invention are as follows: It uses a high-efficiency gas-fired vertical shaft furnace as the smelting equipment, replacing the most energy-intensive melting stage. Only an induction furnace is used at the rear for refining and heat preservation, resulting in a significantly lower overall energy consumption than the traditional method that uses an induction furnace throughout the entire process. Calculations show that the energy cost of producing each ton of molten copper can be reduced by approximately 100-200 yuan, demonstrating extremely significant economic benefits. Through modular design, different types and quantities of induction furnaces can be flexibly selected according to different products. A single system can efficiently produce a variety of products, from ordinary copper and brass to oxygen-free copper, high-copper alloys, bronze, and cupronickel, breaking the limitation of gas-fired vertical shaft furnaces being able to produce only a single type of product. Attached Figure Description

[0013] Figure 1 This is a structural schematic diagram of configuration scheme I of this utility model; Figure 2 yes Figure 1 Schematic diagram of the facade structure; Figure 3 This is a schematic diagram of another embodiment of configuration scheme I of this utility model; Figure 4 This is a schematic diagram of another embodiment of configuration scheme I of this utility model; Figure 5 This is a structural schematic diagram of configuration scheme II of this utility model; Figure 6 This is a schematic diagram of another embodiment of configuration scheme II of this utility model; Figure 7 This is a schematic diagram of another embodiment of configuration scheme II of this utility model; Figure 8 This is a structural schematic diagram of configuration scheme III of this utility model; Figure 9 This is a schematic diagram of another embodiment of configuration scheme III of this utility model.

[0014] In the diagram: 1 Vertical furnace charging device, 2 Gas-fired vertical furnace, 3 Transfer flow channel, 4 Distribution flow channel, 5 Induction furnace, 6 Vertical semi-continuous casting machine, 7 Induction furnace charging trolley, 8 Induction casting furnace. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figure 1-9 This utility model provides a technical solution: a high-efficiency smelting and casting system for the production of various copper and copper alloy ingots, including a gas-fired vertical shaft furnace 2 installed on an operating platform. A vertical shaft furnace feeding device 1 is installed on the side of the gas-fired vertical shaft furnace 2 for feeding materials into it. The gas-fired vertical shaft furnace smelting process is as follows: the furnace body is a vertical cylindrical structure, with its feeding port at the top and heating burners arranged in the lower middle part of the furnace body. After the raw material is added to the furnace chamber from the top feeding port, it is continuously heated and melted by the burners arranged in the lower middle part of the furnace body as it falls from top to bottom. After melting, the molten copper continuously flows out of the furnace body from the copper outlet at the bottom. Gas-fired vertical shaft furnace production involves continuous melting and continuous copper tapping. Since there is no molten pool for storing molten copper in the furnace body, the molten metal cannot be stored and its temperature adjusted within the furnace body. Therefore, operations such as alloy preparation, slag removal, temperature adjustment, and composition adjustment cannot be performed. Thus, gas-fired vertical shaft furnace smelting is currently mainly used in conjunction with continuous casting and rolling mills for the production of low-oxygen copper rods.

[0017] An induction furnace 5 and a vertical semi-continuous casting machine 6 are respectively installed on the side of the operating platform away from the vertical shaft furnace charging device 1. The induction furnace 5 is selected as either a cored induction furnace or a coreless induction furnace depending on the alloy being produced. The gas-fired vertical shaft furnace adopts continuous charging and continuous melting of copper liquid. During the process of the raw material falling from top to bottom, it can fully contact and preheat with the flue gas rising from bottom to top in the furnace. Therefore, it has the characteristics of high thermal efficiency and low energy consumption, with a thermal efficiency of up to 70%. In addition, by reasonably adjusting the gas distribution ratio of the burners, the atmosphere in the furnace can be adjusted to a slightly reducing atmosphere, effectively ensuring that the oxygen content of the copper liquid is 200~400PPM, which is very suitable for the production of low-oxygen tough copper and other copper. Vertical shaft furnaces generally have a large capacity, with an annual output of over 300,000 tons.

[0018] Because gas-fired vertical shaft furnaces use natural gas for heating, and have high thermal efficiency and low energy consumption, their production costs are lower compared to induction furnaces. For example, the energy consumption for smelting copper ingots using a cored induction furnace is approximately 320 kW·h / t, while the energy consumption for smelting using a coreless induction furnace is approximately 420 kW·h / t. In contrast, the energy consumption for smelting using a gas-fired vertical shaft furnace is approximately 32 m³ / t (natural gas). Taking a well-known domestic copper processing company as an example, its comprehensive electricity price is 0.8 yuan / kW·h, and the price of natural gas is 4.5 yuan / m³. Therefore, the production costs are calculated as follows: the main energy cost for smelting copper using a cored induction furnace is 256 yuan / t, the main energy cost for smelting copper using a coreless induction furnace is 336 yuan / t, and the main energy cost for smelting copper using a gas-fired vertical shaft furnace is 144 yuan / t. Thus, gas-fired vertical shaft furnace smelting can save approximately 100-200 yuan / t in energy costs. Taking a copper processing enterprise with an annual production capacity of 100,000 tons of copper and copper alloy products as an example, its smelting feed volume reaches about 150,000 tons, which saves about 15-20 million yuan in energy costs annually. In the current fierce competition among domestic copper processing enterprises, this cost saving can create considerable economic benefits. Moreover, if the gas-fired vertical shaft furnace uses pure oxygen burners, its natural gas consumption per ton will be even lower, theoretically as low as half of the current energy consumption.

[0019] The operating platform is also equipped with a transfer channel 3 and a distribution channel 4 for connecting the gas-fired vertical furnace 2 and the induction furnace 5. The molten copper in the gas-fired vertical furnace 2 enters different distribution channels 4 through the transfer channel 3, and is then distributed to different induction furnaces 5 for slag removal, temperature adjustment, composition adjustment and settling treatment.

[0020] In a preferred embodiment, an induction casting furnace 8 is further provided between the induction furnace 5 and the vertical semi-continuous casting machine 6. The induction casting furnace 8 is located on the casting furnace operating platform to improve production efficiency.

[0021] In a preferred embodiment, the transfer channel 3 and the distribution channel 4 are connected, and the number of distribution channels 4 is 2, 4 or 6, corresponding to 2, 4 or 6 sets of induction furnaces 5 and vertical semi-continuous casting machines 6, etc.

[0022] Option I, please refer to Figure 1-4 : This unit, consisting of one gas-fired vertical shaft furnace, two cored induction furnaces, and two vertical semi-continuous casting machines, produces ordinary copper and brass. Depending on the selected ingot specifications, each induction furnace has an effective capacity of approximately 25 tons. The production cycle is about 2-3 hours per casting cycle, with an hourly capacity of 8-13 tons / hour and an annual output of approximately 50,000-80,000 tons / year. The estimated investment for this unit is approximately 11 million yuan. In contrast, a unit with the same capacity, induction furnace smelting, heat preservation, and vertical semi-continuous casting, would require 2-3 sets, with a maximum investment of approximately 21 million yuan, resulting in a saving of approximately 10 million yuan.

[0023] Alternatively, this solution can be configured with either 1 gas-fired vertical shaft furnace + 4 cored induction furnaces + 4 vertical semi-continuous casting machines or 1 gas-fired vertical shaft furnace + 6 cored induction furnaces + 6 vertical semi-continuous casting machines, making full use of the capacity of gas-fired vertical shaft furnace 2 (the melting capacity of the gas-fired vertical shaft furnace can be selected within the range of 6~30t / h) to achieve a two-fold and three-fold increase in capacity. Since the increase in the capacity of gas-fired vertical shaft furnace 5 will not increase the equipment cost by much, while the induction furnace melting, heat preservation + vertical semi-continuous casting unit needs to be configured two or three times, the investment saved by this invention will also be two or three times.

[0024] When producing ordinary copper and ordinary brass, induction furnace 5 is a conventional cored induction furnace, whose functions include slag removal, adjusting the temperature of molten copper, and settling of the melt. The cored induction furnace can be a vertical furnace or a horizontal furnace. Since the horizontal furnace has better overall sealing, it should be selected as much as possible. Its functions can include heat preservation, casting furnace, or simply as a transfer and temperature control furnace. A dedicated induction casting furnace 8 will be configured later for casting.

[0025] For the production of ordinary brass: Induction furnace 5 is selected as a cored induction furnace. This furnace needs to have a certain heating capacity. During the production process, zinc ingots need to be added to the furnace to adjust the melt composition, and slag removal and settling operations are performed. This cored induction furnace can be a vertical or horizontal furnace, which can perform both heating and melting and casting functions, or after the composition is adjusted to meet the requirements, it can be transferred to a dedicated induction casting furnace 8 for casting.

[0026] Combination Figure 1 , Figure 2 The gas-fired vertical furnace 2 melts cathode copper and recycled waste materials, and then continuously supplies molten copper through the transfer channel 3. The molten copper is transferred to the cored induction furnace 5 through the distribution channel 4. Two cored induction furnaces 5 are set up to receive liquid alternately. When the first cored induction furnace 5 is full, the distribution channel 4 is tilted towards the second cored induction furnace under the action of the bottom hydraulic cylinder. Molten copper begins to be supplied into the second cored induction furnace, while the first cored induction furnace moves to the casting position to start slag removal, temperature adjustment, and settling operations. Then, molten copper is poured into the crystallizer of the first vertical semi-continuous casting machine 6 for casting operations. After casting is completed, the first cored induction furnace 5 moves to the liquid receiving position to receive liquid, and the second cored induction furnace performs the same production operations as the first cored induction furnace. Production alternates in this way.

[0027] In this scheme, the distribution channel 4 adopts two liquid supply methods: one is to receive liquid through the rear slag skimmer and liquid receiving port of the cored induction furnace (such as...). Figure 1 (Left image) Another method involves setting a transfer port in the middle of the rotating shaft at the center of the cored induction furnace. The molten copper is received through this port (e.g., Figure 1(See right figure). In this invention, all schemes flexibly select these two liquid transfer methods. In the following schemes, the liquid transfer methods will not be described one by one.

[0028] Figure 3 This is the layout scheme in Scheme I, which involves one gas-fired vertical shaft furnace, four induction furnaces, and four vertical semi-continuous casting machines. The left diagram in the scheme does not consider the induction furnace charging trolley 7, while the right diagram shows the scheme with all induction furnace charging trolleys 7 installed.

[0029] Figure 4 The arrangement scheme in Scheme I is one gas-fired vertical shaft furnace configured with six induction furnaces and six vertical semi-continuous casting machines.

[0030] In addition, a weighing device is installed at the bottom 5 of the cored induction furnace to accurately measure the copper liquid in the furnace chamber. All induction furnaces of this invention are equipped with weighing devices, which will not be described in detail here.

[0031] During brass production, a feeding port is set at the top of the cored induction furnace, and zinc oxide is added by lifting with an overhead crane. Alternatively, a feeding trolley 7 can be used for feeding.

[0032] The operation of the flow channel and the slag removal and feeding operations of the induction furnace are all completed on the operating platform.

[0033] Considering the reasonable scale of domestic copper processing enterprises, as well as the reasonable arrangement of equipment and flow channels, this invention considers a maximum configuration of 6 induction furnaces (induction furnaces that directly receive material from the gas-fired vertical furnace, excluding induction casting furnaces) for one gas-fired vertical furnace, and the following schemes are the same; in addition, if long-term operation is carried out in the receiving induction furnace, each receiving induction furnace can be equipped with an induction casting furnace to further improve the production efficiency of the furnace group.

[0034] In the following plans, similar to Plan I regarding capacity expansion, investment savings, and allocation principles, will not be elaborated upon one by one.

[0035] Option II, please refer to Figure 5-7 : One gas-fired vertical shaft furnace + two cored induction furnaces + two induction casting furnaces + two vertical semi-continuous casting machines, or one gas-fired vertical shaft furnace + four cored induction furnaces + four induction casting furnaces + four vertical semi-continuous casting machines, or one gas-fired vertical shaft furnace + six cored induction furnaces + six induction casting furnaces + six vertical semi-continuous casting machines can be used to produce oxygen-free copper or low-oxygen copper with strict requirements on oxygen content. It can also be used for the production of ordinary copper ingots.

[0036] For the production of oxygen-free copper or low-oxygen copper with specific oxygen content requirements: To ensure the oxygen content of the molten metal, the receiving induction furnace 5 is a horizontal cored induction furnace with better sealing. A separate cored induction casting furnace is also provided for casting the molten metal. Aeration bricks are installed at the bottom of the furnace chamber. Gases are introduced into the furnace chamber to adjust the oxygen content of the molten metal. These gases include CO, compressed air, and nitrogen. CO primarily reduces the oxygen content in the furnace chamber, compressed air increases it, and nitrogen is introduced when CO or compressed air is not needed to maintain the pores of the aeration bricks and also to degas and remove slag from the molten metal. The aeration bricks are positioned appropriately at the bottom of the furnace chamber according to the layout of the induction furnace. Based on experience, 2-3 aeration bricks can be installed in a single furnace. Through the installation of the aeration bricks, the oxygen content of the molten metal in the furnace chamber can be effectively adjusted between 5 and 200 ppm. The CO flow rate selected in this invention is 0.5~1 m³ / h, compressed air is 2~5 m³ / h, nitrogen is 2~5 m³ / h, and pressure is 0.4~0.6 MPa. The induction furnace should be a well-sealed horizontal furnace, and a dedicated casting furnace should be subsequently installed. The liquid transfer process requires a fully enclosed system, and the flow channel should be equipped with supplementary heating and inert gas protection.

[0037] Option III, please refer to Figure 8-9 : One gas-fired vertical shaft furnace + two coreless induction furnaces + two vertical semi-continuous casting machines, or one gas-fired vertical shaft furnace + four coreless induction furnaces + four vertical semi-continuous casting machines, or one gas-fired vertical shaft furnace + six coreless induction furnaces + six vertical semi-continuous casting machines can produce high copper alloys, complex brass, bronze, cupronickel, etc.

[0038] When producing high-copper alloys, bronze, cupronickel, etc., induction furnace 5 is selected as a coreless induction furnace. This induction furnace has melting capacity. After receiving the copper liquid provided by the gas vertical furnace 2, alloying elements need to be added into the furnace to adjust the composition. The copper liquid with qualified composition can be transferred to the casting furnace for settling and casting, or directly cast into ingots through the flow channel.

[0039] In addition, if long-term operation is to be carried out in the induction furnace 5 for receiving materials, each induction furnace for receiving materials can be equipped with an induction casting furnace 8 to further improve the production efficiency of the furnace group. The configuration of the induction casting furnace 8 is similar to that of scheme II, except that the liquid receiving induction furnace in the figure is replaced with a coreless induction furnace.

[0040] Figure 8The display shows two configuration options for Scheme III. Since Scheme III is mainly used to produce copper alloys with relatively complex compositions, the gas-fired vertical furnace 2 can only provide pure copper and copper liquid after returning scrap is melted. In the coreless induction furnace 5, alloying elements need to be added for alloying treatment. Therefore, it is suitable to set up a feeding trolley 7 to facilitate feeding. Thus, the configuration of Scheme III needs to consider the reasonable arrangement of the feeding trolley. If the feeding trolley 7 is not set up, a crane can also be selected for feeding.

[0041] Figure 9 The configuration scheme in Scheme III is one gas-fired vertical shaft furnace with six receiving induction furnaces.

[0042] Option IV: One gas-fired vertical shaft furnace is used in conjunction with two coreless induction furnaces and two cored induction furnaces, or one gas-fired vertical shaft furnace is used in conjunction with two coreless induction furnaces (or four coreless induction furnaces) and four cored induction furnaces (or two cored induction furnaces) to produce ordinary copper, ordinary brass, high copper alloys, complex brass, bronze, cupronickel, etc. However, considering that there is only one gas-fired vertical shaft furnace in this configuration, it cannot simultaneously supply copper liquid with a large difference in composition to multiple induction furnaces. Otherwise, the composition inside the induction furnace cannot be adjusted. Alternatively, the gas-fired vertical shaft furnace may only be used to provide pure copper liquid, requiring the addition of scrap and alloying elements by the furnace group for alloying. Or, in this configuration, the gas-fired vertical shaft furnace supplies liquid to different induction furnaces according to the alloy composition, rather than supplying liquid simultaneously. If the liquid is supplied separately, the gas-fired vertical shaft furnace can be connected to more induction furnaces if the flow channel arrangement allows. However, connecting more induction furnaces is not to take advantage of the high production capacity of the gas-fired vertical shaft furnace.

[0043] Configuration IV is any combination of Configurations I, II, and III, and will not be illustrated further. Furthermore, the configuration of the gas-fired shaft furnace 2, which supplies molten copper to different downstream induction furnaces, involves more induction furnaces. This is not the intention of this invention to fully utilize the high production capacity advantage of the gas-fired shaft furnace, and will not be described in detail.

[0044] In the above scheme, since the gas-fired vertical furnace 2 is continuously supplied with liquid, the downstream induction furnaces 5 are configured in pairs to alternately receive the liquid supply from the gas-fired vertical furnace. When the gas-fired vertical furnace supplies liquid to 4 or 6 induction furnaces, the width, slope, and length of the transfer channel should be the same to ensure that the copper liquid is supplied in equal quantities and at the same rate in each channel. The transfer channel needs to be well sealed, and insulation and heat replenishment measures should be set up. Gas protection should be set up if necessary. The transfer channel needs to be equipped with a drain port in a suitable place. In case of a problem, the copper liquid will be transferred to the ladle or emergency pit through the drain port. The induction furnace should fully consider its heating and heat preservation capabilities according to its functional requirements. The induction furnace should fully consider the needs of normal operation and safe production, such as reasonable feeding, slag removal, tilting, transfer, casting, and emergency accidents.

[0045] The above process equipment configurations all involve a gas-fired vertical shaft furnace + induction furnace + vertical semi-continuous casting machine or fully continuous casting machine. Based on the current technical situation of casting machines in China, since fully continuous casting machines require the import of foreign equipment, domestic casting machines are mainly vertical semi-continuous casting machines. The above schemes all take vertical semi-continuous casting machine 6 as an example.

[0046] Since the gas-fired vertical shaft furnace 2 has a large capacity, in order to maximize its production capacity advantage, the induction furnace should be equipped with a large furnace chamber, and large-sized ingots (single ingot weight 6~25t) should be selected, with an ingot width of 450~1250mm. Among them, for the ingot width series of 450mm, it is advisable to select three ingots to be cast at the same time, and for the ingot width series of 650mm, double-flow casting should be used.

[0047] By using a "one furnace to multiple furnaces" configuration and different types of induction furnaces, it is possible to efficiently produce a variety of products, from ordinary copper and brass to oxygen-free copper, high-copper alloys, bronze, and cupronickel, thus achieving the unification of large-scale continuous production and flexible conversion of multiple alloys.

[0048] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency smelting and casting system for the production of various copper and copper alloy ingots, characterized in that: It includes a gas-fired vertical furnace (2) set on the operating platform. A vertical furnace feeding device (1) is provided on the side of the gas-fired vertical furnace (2). An induction furnace (5) and a vertical semi-continuous casting machine (6) are respectively provided on the side of the operating platform away from the vertical furnace feeding device (1). A transfer channel (3) and a distribution channel (4) for connecting the gas-fired vertical furnace (2) and the induction furnace (5) are provided on the operating platform.

2. The high-efficiency smelting and casting system for producing different copper and copper alloy ingots according to claim 1, characterized in that: The transfer channel (3) and the distribution channel (4) are connected, and the number of distribution channels (4) is an even number.

3. The high-efficiency smelting and casting system for producing different copper and copper alloy ingots according to claim 1, characterized in that: The transfer channel (3) and the distribution channel (4) are provided with a drain outlet that communicates with the pouring ladle or the accident pit.

4. The efficient smelting and casting system for producing different copper and copper alloy ingots according to claim 1, characterized in that: The induction furnace (5) is selected as either a cored induction furnace or a coreless induction furnace depending on the type of alloy produced.

5. The high-efficiency smelting and casting system for producing different copper and copper alloy ingots according to claim 1, characterized in that: The operating platform is also equipped with an induction furnace feeding trolley (7).

6. The efficient smelting and casting system for producing different copper and copper alloy ingots according to claim 1, characterized in that: An induction casting furnace (8) is also provided between the induction furnace (5) and the vertical semi-continuous casting machine (6), and the induction casting furnace (8) is set on the casting furnace operation platform.

7. A high-efficiency smelting and casting system for the production of different copper and copper alloy ingots according to any one of claims 1-6, characterized in that: The number of induction furnaces (5) is two, four or six, which alternately receive copper liquid supplied by gas-fired vertical furnaces (2) and are equipped with a corresponding number of vertical semi-continuous casting machines (6).

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