Conjoined furnace

Abstract

The utility model provides a conjoined furnace. The conjoined furnace comprises a slag removal furnace, a separation furnace, a first metal furnace and a second metal furnace, the slag removal furnace and the separation furnace are in common wall connection, the first metal furnace and the separation furnace are in common wall connection, the whole structure is compact in arrangement, energy and refractory material consumption are saved, and the occupied area is small. Metal melts are in direct-current communication in the slag removal furnace, the separation furnace and the first metal furnace, the metal melts with different densities are fully layered due to density difference in the flowing process, the process is short, the latent heat utilization rate is high, energy consumption is low, and continuous operation can be achieved; and an integrally poured lining is arranged in each furnace body, so that the heat preservation effect is good, and the energy consumption is further reduced.

Description

Technical Field

[0001] This utility model belongs to the field of pyrometallurgical technology, specifically relating to a combined furnace. Background Technology

[0002] In the smelting process of non-ferrous metals, mixed metal melts composed of multiple metals often occur, requiring further removal of impurities and separation to obtain individual metals. For example, in the smelting process of lead-zinc materials, lead and zinc can be reduced simultaneously, with zinc volatilizing into the flue gas in the form of zinc vapor. The lead and zinc-containing metal melt is then obtained by lead rain collection, and further separation based on the difference in melting points between lead and zinc yields crude zinc.

[0003] Chinese patent CN205556750U discloses a direct smelting system that simultaneously produces metallic lead and zinc. The zinc vapor obtained after smelting lead and zinc materials is condensed into zinc-lead liquid using a zinc vapor condenser. The cooled zinc-lead liquid then enters a cooling chute and a lead-zinc separation tank connected to it to separate the zinc liquid from the lead liquid. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a combined furnace that can achieve effective separation of molten metal, and has the advantages of uniform temperature field, good metal separation effect, low energy consumption and simple operation.

[0005] To solve the above-mentioned technical problems, the integrated furnace provided by this utility model includes a slag removal furnace, a separation furnace, a first metal furnace, a second metal furnace, a first common wall, a second common wall, a first channel, a second channel, and a third channel;

[0006] The furnace bodies of the slag removal furnace, the separation furnace, and the first metal furnace are a single integral furnace body, wherein the slag removal furnace and the separation furnace are separated by the first common wall, and the first metal furnace and the separation furnace are separated by the second common wall;

[0007] The first channel passes through the first common wall and connects the slag removal furnace and the separation furnace;

[0008] The second channel passes through the second common wall and connects the separation furnace and the first metal furnace;

[0009] The third channel connects the separation furnace and the second metal furnace;

[0010] The slag removal furnace is provided with a material inlet and a slag outlet. The slag outlet is lower than the material inlet, and both the material inlet and the slag outlet are higher than the first channel.

[0011] The height of the third channel is higher than the height of the second channel.

[0012] Furthermore, the slag removal furnace also includes a cofferdam; the cofferdam is disposed inside the furnace body and connected to the bottom surface of the furnace body, and the bottom of the cofferdam is provided with a connecting hole; the material inlet and the slag outlet are respectively disposed on both sides of the cofferdam; the height of the material inlet and the slag outlet is higher than that of the cofferdam.

[0013] Furthermore, the first channel and the second channel are respectively located at both ends of the separation furnace along its length; the second channel and the third channel are respectively located on opposite long sides of the separation furnace.

[0014] Furthermore, the upper part of the slag removal furnace is equipped with a dust collection hood located above the material inlet.

[0015] Furthermore, the integrated furnace provided by this utility model also includes a heating system, which includes a first heating device, a second heating device, and a third heating device; the first heating device is disposed on the upper part of the slag removal furnace; the second heating device is disposed on the upper part of the separation furnace; and the third heating device is disposed on the upper part of the second metal furnace.

[0016] Furthermore, the third channel is provided with a movable adjustment plate, which moves at the opening of the third channel to adjust the height difference between the opening of the third channel and the second channel.

[0017] Furthermore, the integrated furnace provided by this utility model also includes several movable furnace covers, which are interconnected and cover the upper parts of the slag removal furnace, the separation furnace, the first metal furnace and the second metal furnace.

[0018] Furthermore, the separation furnace also includes a vent pipe, which is located on the side of the furnace body near the first channel.

[0019] Furthermore, the integrated furnace provided by this utility model also includes an inner lining system, which includes a first inner lining, a second inner lining, a third inner lining, and a fourth inner lining. The first inner lining corresponds to and is disposed inside the slag removal furnace, the second inner lining corresponds to and is disposed inside the separation furnace, the third inner lining corresponds to and is disposed inside the first metal furnace, and the fourth inner lining corresponds to and is disposed inside the second metal furnace. Furthermore, the first, second, third, and fourth inner linings are all integrally cast.

[0020] This utility model has the following beneficial effects:

[0021] 1) The combined furnace provided by this utility model shares the furnace walls of the slag removal furnace and the separation furnace as well as the first metal furnace and the separation furnace, which is compact, saves energy and refractory material, and occupies a small area;

[0022] 2) The molten metal flows directly through the slag removal furnace, the separation furnace and the first metal furnace, resulting in a short process, high latent heat utilization, low energy consumption and continuous operation.

[0023] 3) Each furnace body is equipped with an integrally cast lining, which has good heat insulation effect and reduces heat loss;

[0024] 4) The first and second channels are set at both ends of the length of the separator, so that the two metals with different melt densities can be fully separated during the flow, resulting in a high direct metal recovery rate.

[0025] 5) Setting up a weir in the slag removal furnace allows for complete separation of the slag phase and the metal phase, simplifying the slag removal operation;

[0026] 6) The furnace cover and vent pipe are designed to facilitate furnace maintenance. Attached Figure Description

[0027] Figure 1 This is a top sectional view of the integrated furnace provided in some embodiments of this utility model.

[0028] Figure 2 yes Figure 1 Schematic diagram of the cross section along the AA direction.

[0029] Figure 3 yes Figure 1 Schematic diagram of the cross section along the BB direction.

[0030] Figure 4 yes Figure 1 Schematic diagram of the cross section along the CC direction.

[0031] Figure 5 yes Figure 1 Schematic diagram of the cross section in the middle DD direction.

[0032] Figure 6 yes Figure 1 Schematic diagram of the cross section in the middle EE direction.

[0033] Figure 7 This is a top view schematic diagram of the furnace cover of the lead return pool of the integrated furnace provided in some embodiments of this utility model.

[0034] Explanation of reference numerals in the attached figures:

[0035] 001 First shared wall, 002 Second shared wall

[0036] 010 First Channel, 020 Second Channel, 030 Third Channel

[0037] 100 slag removal furnace,

[0038] 110 Material Inlet, 120 Slag Outlet, 130 Cofferdam, 131 Connecting Hole, 140 Dust Collection Hood

[0039] 200 separation furnace,

[0040] 210 vent pipe,

[0041] 300 First Metal Furnace

[0042] 400 Second Metal Furnace

[0043] 510 First heating device, 520 Second heating device, 530 Third heating device.

[0044] 600 furnace cover,

[0045] 610 explosion-proof door,

[0046] 710 First lining, 720 Second lining, 730 Third lining, 740 Fourth lining. Detailed Implementation

[0047] To more clearly and completely describe the technical solution of this utility model, the following detailed description is provided through specific embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model. Various changes can be made within the scope of the claims of this utility model.

[0048] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of this utility model. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0049] It should be noted that in the description of this utility model, terms such as "inner," "outer," "upper," "lower," "top," and "bottom," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0050] Furthermore, it should be noted that in the description of this utility model, unless otherwise expressly specified and limited, the terms "set," "connect," and "install" should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items.

[0051] like Figure 1 As shown, the integrated furnace provided in this embodiment includes a slag removal furnace 100, a separation furnace 200, a first metal furnace 300, a second metal furnace 400, a first common wall 001, a second common wall 002, a first channel 010, a second channel 020, and a third channel 030; as Figure 5 As shown, the slag removal furnace 100 includes a material inlet 110 and a slag outlet 120. The slag outlet 120 is lower than the material inlet 110, and both the material inlet 110 and the slag outlet 120 are higher than the first channel 010; Figure 1 As shown, the furnace bodies of the slag removal furnace 100, the separator 200, and the first metal furnace 300 are a single integral furnace body. The slag removal furnace 100 and the separator 200 are separated by a first common wall 001, and the first metal furnace 300 and the separator 200 are separated by a second common wall 002. A first channel 010 passes through the first common wall 001 and connects the slag removal furnace 100 and the separator 200; a second channel 020 passes through the second common wall 002 and connects the separator 200 and the first metal furnace 300; a third channel 030 connects the separator 200 and the second metal furnace 400. Figure 4 As shown, the height of the third channel 030 is higher than the height of the second channel 020. In the integrated furnace provided by this utility model, the slag removal furnace 100 and the separation furnace 200, as well as the first metal furnace 300 and the separation furnace 200, share some furnace walls, resulting in a compact layout, saving energy and refractory material usage, and occupying a small area. The molten metal flows directly through the slag removal furnace 100, the separation furnace 200, and the first metal furnace 300, resulting in a short flow path, high latent heat utilization, and low energy consumption.

[0052] like Figure 1 and Figure 5 As shown in some embodiments of this utility model, the slag removal furnace 100 further includes a cofferdam 130; the cofferdam 130 is disposed inside the furnace body of the slag removal furnace 100 and connected to the bottom surface of the furnace body, and a connecting hole 131 is provided at the bottom of the cofferdam 130; the material inlet 110 and the slag outlet 120 are respectively disposed on both sides of the cofferdam 130; the heights of the material inlet 110 and the slag outlet 120 are both higher than the cofferdam 130. The cofferdam 130 and the connecting hole 131 provided at the bottom of the cofferdam 130 facilitate the thorough stratification of slag and molten metal, and the slag removal operation is simple.

[0053] like Figure 1As shown, in some embodiments provided by this utility model, the first channel 010 and the second channel 020 are respectively disposed at both ends of the separation furnace 200 along its length; the second channel 020 and the third channel 030 are respectively disposed on opposite long sides of the separation furnace 200. Distributing the first and second channels at both ends of the separation furnace along its length ensures that the eutectic containing two metals of different densities undergoes sufficient stratification during flow, resulting in a high metal recovery rate.

[0054] like Figure 5 As shown, in some embodiments of this utility model, the integrated furnace also includes a dust collection hood 140, which is located above the slag removal furnace 100, corresponding to the material inlet 110. The dust collection hood 140 can reduce dust pollution when materials enter the integrated furnace.

[0055] like Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments provided by this utility model, the combined furnace further includes a heating system, which includes a first heating device 510, a second heating device 520 and a third heating device 530; the first heating device 510 is disposed on the upper part of the slag removal furnace 100; the second heating device 520 is disposed on the upper part of the separation furnace 200; and the third heating device 530 is disposed on the upper part of the second metal furnace 400.

[0056] In some embodiments provided by this utility model, the third channel 030 is provided with a movable adjustment plate. The adjustment plate moves at the opening of the third channel 030 to adjust the height difference between the opening of the third channel 030 and the second channel 020, so as to adjust the composition of the metal phase flowing out through the third channel 030 according to product requirements.

[0057] like Figure 2 , Figure 4 and Figure 5 As shown in some embodiments of this utility model, the integrated furnace also includes several movable furnace covers 600, which are interconnected and cover the upper parts of the slag removal furnace 100, the separation furnace 200, the first metal furnace 300, and the second metal furnace 400. Figure 2 As shown, the separation furnace 200 also includes a vent pipe 210, which is located on the side of the furnace body near the first channel 010. The movable and removable furnace cover 600 allows for maintenance of each furnace body, and the vent pipe facilitates the rapid emptying of molten metal from the furnace during maintenance.

[0058] like Figure 1 , Figure 2 , Figure 4 and Figure 5As shown, some embodiments of this utility model further include an inner lining system, which includes a first inner lining 710, a second inner lining 720, a third inner lining 730, and a fourth inner lining 740. The first inner lining 710 corresponds to and is disposed inside the slag removal furnace 100; the second inner lining 720 corresponds to and is disposed inside the separation furnace 200; the third inner lining 730 corresponds to and is disposed inside the first metal furnace 300; and the fourth inner lining 740 corresponds to and is disposed inside the second metal furnace 400. Preferably, the first inner lining 710, the second inner lining 720, the third inner lining 730, and the fourth inner lining 740 are all integrally cast. The integrally cast inner lining inside each furnace body provides good insulation and reduces the energy consumption of the integrated furnace.

[0059] Example

[0060] In this embodiment, the molten metal is a slag-containing lead-zinc molten metal produced by a lead-zinc mixed smelting system. Its main components are molten lead, molten zinc, and a small amount of slag. The densities of the three components, from smallest to largest, are: slag, molten zinc, and molten lead. The slag-containing lead-zinc molten metal at approximately 550°C enters the slag removal furnace 100 through the material inlet 110. A dust removal hood is installed above the material inlet 110 in the slag removal furnace 100 to remove the smoke and dust generated when the material flows through the inlet, thus preventing environmental pollution. Molten lead-zinc containing slag flows through the connecting hole 131 at the bottom of the weir 130, while a light slag layer passes over the weir 130, accelerating the separation of slag and molten metal. The separated slag is discharged from the furnace through the slag discharge port 120 via the slag discharge chute. The top height of the connecting hole 131 is positioned according to the feed rate, and is lower than the boundary height between the slag layer and the metal layer, allowing the metal layer to enter the separation furnace 200 through the connecting hole 131, while the slag layer is blocked by the weir 130 within the slag removal furnace 100. A first heating device 510 is installed at the top of the slag removal furnace 100 to control the furnace temperature to be stable at around 550-650℃, keeping the lead and zinc in a low-volatility molten state, promoting the flow of the slag-containing lead-zinc melt within the furnace and the separation of slag.

[0061] The molten lead and zinc in the slag removal furnace 100 flows into the separator 200 through the first channel 010 in the first common wall 001 between the slag removal furnace 100 and the separator 200. The separator 200 is a long and narrow furnace body. The first channel 010 is located at one end of the long side of the separator 200. The other end of the long side of the separator 200 is provided with a second channel 020 and a third channel 030. The molten lead and zinc flowing from the slag removal furnace 100 flows from one end of the separator 200 to the other end. During the flow, due to the difference in density, the molten lead and molten zinc gradually separate into layers, from bottom to top: a molten lead layer, a mixed lead-zinc liquid layer, and a molten zinc layer. The height of the molten zinc layer is approximately 220-250 mm. As the amount of liquid in the furnace continues to accumulate, the molten lead layer and the molten zinc layer become thicker and thicker. The lead molten layer enters the first metal furnace 300 through the second channel 020 at the bottom of the separation furnace 200, while the zinc molten layer above it enters the second metal furnace 400 through the third channel 030, which is higher than the second channel 020, thus completing the separation of lead and zinc. The first metal furnace 300 allows the separated lead molten metal to enter the next stage in liquid form, with a lead molten metal temperature of approximately 470-480℃, thus circulating throughout the entire process. The third channel 030 and the second channel 020 are positioned opposite each other on the two long sides of the separation furnace 200. A movable adjusting plate is provided in the third channel 030. The adjusting plate moves at the opening of the third channel 030 to adjust the height difference between the opening of the third channel 030 and the second channel 020. Different heights of the adjusting plate can be set according to product requirements, gradually extending the separation time of the lead and zinc molten metal in the separation furnace 200. The longer the separation time, the more thorough the separation of lead and zinc, reducing the lead content in the upper zinc molten metal, and thus adjusting the composition of the zinc molten metal entering the second metal furnace 400. Due to differences in the height of the regulating plates, the zinc liquid entering the second metal furnace 400 from the separation furnace 200 has different lead contents. A second heating device 520 is installed at the top of the separation furnace 200 to control the furnace temperature, ensuring that the metal in the separation furnace 200 remains fluid in a eutectic state for lead-zinc separation. Since the lead content in the lead-zinc eutectic is much higher than the zinc content, less zinc liquid is separated into the second metal furnace 400 after gravity stratification in the separation furnace 200. To ensure the continuity of the next zinc ingot casting process, the zinc liquid needs to be stored in liquid form in the second metal furnace 400. Therefore, a third heating device 530 is installed at the top of the second metal furnace 400 to maintain the zinc liquid at 500-550°C before casting. At the same time, the slag removal furnace 100, the separation furnace 200, the first metal furnace 300, and the second metal furnace 400 are all lined with special castable refractory, which is integrally cast to enhance the insulation inside the furnace and further reduce energy consumption.

[0062] The separation furnace 200 also includes a vent pipe 210, which is located on the side of the furnace body near the first channel 010. In case of equipment malfunction or need for shutdown for maintenance, the residual molten metal in the furnace can be directly discharged through the vent pipe 210 for quick maintenance. At the same time, all furnace bodies, including the slag removal furnace 100, the separation furnace 200, the first metal furnace 300, and the second metal furnace 400, are equipped with movable furnace covers 600. The furnace covers 600 are interconnected and cover the upper part of the furnace body, which facilitates the maintenance of the furnace body. Explosion-proof doors 610 can be selectively installed on the furnace covers 600. In case of abnormal situations such as deflagration or sudden increase in furnace pressure, the explosion-proof doors 610 will automatically open to release pressure under the action of air pressure and overcome their own gravity. After the pressure is released, the explosion-proof doors 610 will automatically close under their own gravity and continue to maintain a sealed state.

[0063] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A combined furnace, characterized in that, It includes a slag removal furnace (100), a separation furnace (200), a first metal furnace (300), a second metal furnace (400), a first common wall (001), a second common wall (002), a first channel (010), a second channel (020), and a third channel (030); The furnace bodies of the slag removal furnace (100), the separation furnace (200), and the first metal furnace (300) are a single integral furnace body. The slag removal furnace (100) and the separation furnace (200) are separated by a first common wall (001), and the first metal furnace (300) and the separation furnace (200) are separated by a second common wall (002); the first channel (010) passes through the first common wall (001) and connects the slag removal furnace (100) and the separation furnace (200); The second channel (020) passes through the second common wall (002) and connects the separation furnace (200) and the first metal furnace (300); The third channel (030) connects the separation furnace (200) and the second metal furnace (400); The slag removal furnace (100) is provided with a material inlet (110) and a slag outlet (120). The slag outlet (120) is lower than the material inlet (110), and both the material inlet (110) and the slag outlet (120) are higher than the first channel (010). The height of the third channel (030) is higher than the height of the second channel (020).

2. The integrated furnace as described in claim 1, characterized in that, The slag removal furnace (100) also includes a cofferdam (130); the cofferdam (130) is located inside the furnace body of the slag removal furnace (100) and connected to the bottom surface of the furnace body, and the bottom of the cofferdam (130) is provided with a connecting hole (131); the material inlet (110) and the slag outlet (120) are respectively located on both sides of the cofferdam (130); the height of the material inlet (110) and the slag outlet (120) is higher than that of the cofferdam (130).

3. The integrated furnace as described in claim 1, characterized in that, The first channel (010) and the second channel (020) are respectively located at both ends of the separation furnace (200) along its length; the second channel (020) and the third channel (030) are respectively located on opposite long sides of the separation furnace (200).

4. The integrated furnace as described in claim 2, characterized in that, The slag removal furnace (100) is equipped with a dust collection hood (140) located above the material inlet (110).

5. The combined furnace as described in any one of claims 1-4, characterized in that, It also includes a heating system, which includes a first heating device (510), a second heating device (520) and a third heating device (530); the first heating device (510) is disposed on the upper part of the slag removal furnace (100); the second heating device (520) is disposed on the upper part of the separation furnace (200); and the third heating device (530) is disposed on the upper part of the second metal furnace (400).

6. The combined furnace as described in any one of claims 1-4, characterized in that, The third channel (030) is provided with a movable adjustment plate, which moves at the opening of the third channel (030) to adjust the height difference between the opening of the third channel (030) and the second channel (020).

7. The combined furnace as described in any one of claims 1-4, characterized in that, It also includes several movable furnace covers (600), which are interconnected and cover the upper parts of the slag removal furnace (100), the separation furnace (200), the first metal furnace (300) and the second metal furnace (400).

8. The combined furnace as described in any one of claims 1-4, characterized in that, The separation furnace (200) also includes a vent pipe (210), which is located on the side of the furnace body near the first channel (010).

9. The combined furnace as described in any one of claims 1-4, characterized in that, It also includes an inner lining system, which includes a first inner lining (710), a second inner lining (720), a third inner lining (730), and a fourth inner lining (740); the first inner lining (710) is matched with the slag removal furnace (100) and disposed inside the slag removal furnace (100), the second inner lining (720) is matched with the separation furnace (200) and disposed inside the separation furnace (200), the third inner lining (730) is matched with the first metal furnace (300) and disposed inside the first metal furnace (300), and the fourth inner lining (740) is matched with the second metal furnace (400) and disposed inside the second metal furnace (400).

10. The combined furnace as described in claim 9, characterized in that, The first inner lining (710), the second inner lining (720), the third inner lining (730) and the fourth inner lining (740) are all integrally cast.

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