Regenerated metal reverberatory melting equipment

Abstract

The application discloses a kind of regenerative metal reverberatory smelting equipment, comprising: feeding chamber, accommodate raw material to be smelted;Combustion chamber;Flue gas circulating device, between the feeding chamber and the combustion chamber is connected, and the flue gas in the feeding chamber is input into the combustion chamber;And metal liquid circulating device, between the feeding chamber and the combustion chamber is connected, and the metal liquid in the combustion chamber is input into the feeding chamber;Wherein, the combustion chamber and the feeding chamber are communicated, the combustion chamber can input high-temperature flue gas into the feeding chamber, and the feeding chamber can input molten metal liquid into the combustion chamber.The application can adapt to different specifications of raw material, and energy saving and emission reduction in smelting process, effectively improve recovery rate.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal smelting, in particular to a regenerative metal back furnace smelting equipment. BACKGROUND

[0002] The regenerative metal is a metal and its alloy which is smelted by using waste metal products and metal waste in industrial production process as raw materials. Since the raw materials recovered in the market are relatively complex, such as different sizes of raw materials, and most of them are recovered in the form of baled materials, the raw materials carry impurities or contain paint, coating and other pollutants themselves. If the raw materials are directly back furnace smelted, a large amount of harmful gas will be generated in the combustion process, and it is difficult to produce qualified clean metal liquid.

[0003] Therefore, the existing raw materials need to be pretreated in a series of processes before back furnace smelting. First, the raw materials need to be crushed, then the impurities in the raw materials which are easy to separate are removed, and the paint, coating and other pollutants are thermally decomposed by the decomposition equipment at high temperature to decompose the attachments on the surface of the raw materials. Finally, the clean raw materials are sent into the smelting furnace for smelting to produce qualified metal liquid for subsequent casting.

[0004] From the above description, in order to remelt the raw materials, a series of equipment need to be used, and there is raw material consumption and a large amount of energy consumption in the pretreatment process, which is not conducive to energy saving and emission reduction and cost reduction. In addition, since the treatment equipment required for different raw materials is also different, the cost in the smelting process is further increased.

[0005] Therefore, it is necessary to improve the prior art to overcome the defects in the prior art. SUMMARY

[0006] The purpose of the present application is to provide a regenerative metal back furnace smelting equipment which can save energy and reduce emissions and reduce production cost.

[0007] The purpose of the present application is achieved by the following technical scheme: a regenerative metal back furnace smelting equipment, comprising: a charging chamber for accommodating raw materials to be smelted; a combustion chamber; a flue gas circulating device connected between the charging chamber and the combustion chamber and inputting flue gas in the charging chamber into the combustion chamber; and a metal liquid circulating device connected between the charging chamber and the combustion chamber and inputting metal liquid in the combustion chamber into the charging chamber; wherein the combustion chamber and the charging chamber are communicated, the combustion chamber can input high-temperature flue gas into the charging chamber, and the charging chamber can input molten metal liquid into the combustion chamber.

[0008] Further, the flue gas circulating device comprises a first flue gas pipe communicating with the charging chamber, a second flue gas pipe communicating with the combustion chamber, and a first driving member connected between the first flue gas pipe and the second flue gas pipe and providing driving force for the flue gas to flow from the first flue gas pipe to the second flue gas pipe.

[0009] Further, the raw material is stacked in the charging chamber, the charging chamber has a flue gas inlet, and the first flue gas pipe and the flue gas inlet are respectively located at two sides of the charging chamber in the stacking direction.

[0010] Further, the combustion chamber comprises a burner, and the second flue gas pipe is connected at a position of the combustion chamber close to the burner. Further, the molten metal circulating device comprises a first molten metal pipe communicating with the charging chamber, a second molten metal pipe communicating with the combustion chamber, and a second driving member connected between the first molten metal pipe and the second molten metal pipe and providing driving force for the molten metal to flow from the second molten metal pipe to the first molten metal pipe.

[0011] Further, the first molten metal pipe is connected at a bottom or a position close to the bottom of the charging chamber.

[0012] Further, a top of the charging chamber is provided with a charging opening, and the charging opening is provided with an openable and closable charging door.

[0013] Further, a treatment chamber is further provided and communicates between the charging chamber and the combustion chamber, the molten metal in the charging chamber can enter the combustion chamber through the treatment chamber, and the high-temperature flue gas in the combustion chamber can enter the charging chamber through the treatment chamber.

[0014] Further, a first molten metal flow channel is provided between the treatment chamber and the charging chamber, a second molten metal flow channel is provided between the treatment chamber and the combustion chamber, and the first molten metal flow channel and the second molten metal flow channel have a liquid level difference for driving the molten metal to flow from the charging chamber to the combustion chamber.

[0015] Further, a first flue gas flow channel is provided between the treatment chamber and the charging chamber, a second flue gas flow channel is provided between the treatment chamber and the combustion chamber, and the first flue gas flow channel and the second flue gas flow channel are both higher than the highest liquid level of the molten metal.

[0016] Compared with the prior art, the present application has the following beneficial effects: the present application sets the charging chamber and the combustion chamber, and the flue gas circulating device is arranged between the charging chamber and the combustion chamber, the charging chamber can accommodate raw materials of various specifications, the high-temperature flue gas generated by the combustion chamber can enter the charging chamber to perform high-temperature treatment on the surface of the raw materials in the charging chamber, so as to decompose the pollutants on the surface of the raw materials, and the flue gas carrying the decomposed pollutants is returned to the combustion chamber through the flue gas circulating device for combustion treatment, so as to avoid the pretreatment of the raw materials, save energy and reduce emissions, and reduce the cost, and since part of the pollutants can also provide the required substances for combustion, the energy consumption of the combustion chamber can also be reduced, and the cost is further reduced; the smelting equipment further comprises the metal liquid circulating device, the metal liquid in a molten state of the raw materials in the smelting process can enter the combustion chamber, the combustion chamber can heat the metal liquid, and the metal liquid is returned to the charging chamber through the metal liquid circulating device to flush the raw materials in a non-molten state, compared with directly burning and heating the raw materials, the raw material loss is less, and the recovery rate is effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a sectional view of the present application in the front view direction.

[0018] Figure 2 is a sectional view of the present application in the top view direction.

[0019] Figure 3 is a sectional view of the present application in the side view direction.

[0020] Figure 4 is Figure 1 structure schematic diagram when the feeding mechanism is arranged.

[0021] LIST OF REFERENCE NUMERALS

[0022] 100, charging chamber; 11, charging port; 12, charging door; 200, combustion chamber; 21, burner; 300, flue gas circulating device; 31, first flue gas pipeline; 32, second flue gas pipeline; 33, first driving member; 400, metal liquid circulating device; 41, first metal liquid pipeline; 42, second metal liquid pipeline; 43, second driving member; 500, treatment chamber; 600, first partition wall; 61, first metal liquid flow channel; 700, second partition wall; 71, second metal liquid flow channel; 72, second flue gas flow channel; 800, mounting space; 900, feeding mechanism. DETAILED DESCRIPTION

[0023] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the purpose of description, only the parts related to the present application are shown in the drawings, rather than all the structures. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0024] The terms "comprising" and "having" and any variations thereof herein are intended to cover a non-exclusive inclusion. For example, a process, method, system, product or apparatus that comprises a list of steps or units is not limited to the listed steps or units, but can optionally further include steps or units not listed, or can optionally further include other steps or units inherent to such processes, methods, products or apparatus.

[0025] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is explicitly contemplated that embodiments described herein can be combined with each other.

[0026] Reference will now be made to the drawings, in which Figures 1 to 4 As shown in the drawings, the regenerative metal melting equipment corresponding to a preferred embodiment of the present application comprises: a charging chamber 100 for accommodating raw materials to be melted; a combustion chamber 200 for providing heat; a flue gas circulating device 300 connected between the charging chamber 100 and the combustion chamber 200 and inputting flue gas in the charging chamber 100 into the combustion chamber 200; and a molten metal circulating device 400 connected between the charging chamber 100 and the combustion chamber 200 and inputting molten metal in the combustion chamber 200 into the charging chamber 100; wherein the combustion chamber 200 and the charging chamber 100 are communicated, the combustion chamber 200 can input high-temperature flue gas into the charging chamber 100, and the charging chamber 100 can input molten metal after melting into the combustion chamber 200.

[0027] The present application sets the charging chamber 100 and the combustion chamber 200, and the flue gas circulating device 300 is arranged between the charging chamber 100 and the combustion chamber 200. The charging chamber 100 can accommodate raw materials of various specifications, and the high-temperature flue gas generated by the combustion chamber 200 can enter the charging chamber 100 to perform high-temperature treatment on the surface of the raw materials in the charging chamber 100, thereby decomposing the pollutants on the surface of the raw materials. The flue gas carrying the decomposed pollutants is returned to the combustion chamber 200 through the flue gas circulating device 300 for combustion treatment, thereby avoiding the pretreatment of the raw materials, saving energy and reducing emissions, and reducing costs. In addition, part of the pollutants can also provide the required substances for combustion, thereby reducing the energy consumption of the combustion chamber 200 and further reducing costs. The smelting equipment further comprises a metal liquid circulating device 400. The metal liquid in a molten state during the smelting process of the raw materials can enter the combustion chamber 200, and the combustion chamber 200 can heat the metal liquid and return it to the charging chamber 100 through the metal liquid circulating device 400 to flush the raw materials in a non-molten state. Compared with directly burning and heating the raw materials, the raw material loss is less, and the recovery rate is effectively improved.

[0028] Further, the charging chamber 100 extends along the height direction of the smelting equipment to increase the volume of the charging chamber 100. A plurality of raw materials can be placed in the charging chamber 100 by stacking to facilitate thermal decomposition and smelting. The top of the charging chamber 100 is provided with a charging port 11, and the charging port 11 is provided with an openable and closable charging door 12. The raw materials can be poured into the charging chamber 100 from the charging port 11.

[0029] The combustion chamber 200 comprises a burner 21, and the burner 21 has a certain spacing with the bottom of the combustion chamber 200 to prevent the metal liquid flowing from the charging chamber 100 into the combustion chamber 200 from contacting and damaging the burner 21. In the present embodiment, the height of the burner 21 is higher than the highest liquid level of the metal liquid in the combustion chamber 200. Preferably, the number of burners 21 is multiple, and the burners 21 are arranged side by side. The ejection end of the burner 21 faces the charging chamber 100 and provides a driving force for the high-temperature flue gas flowing to the charging chamber 100.

[0030] Further, the flue gas circulating device 300 comprises a first flue gas pipeline 31, a second flue gas pipeline 32, and a first driving member 33. The first flue gas pipeline 31 communicates with the charging chamber 100, the second flue gas pipeline 32 communicates with the combustion chamber 200, and the first driving member 33 is connected between the first flue gas pipeline 31 and the second flue gas pipeline 32 and provides a driving force for the flue gas to flow from the first flue gas pipeline 31 to the second flue gas pipeline 32. In the present embodiment, the first driving member 33 can be a fan to provide suction.

[0031] The charging chamber 100 has a flue gas inlet (not shown in the figure), and the flue gas inlet and the first flue gas pipeline 31 are respectively located on both sides of the charging chamber 100 in the stacking direction of the raw materials to ensure that the raw materials in the entire charging chamber 100 can be effectively subjected to thermal decomposition, avoiding dead angles.

[0032] In an embodiment, the first flue gas pipe 31 is connected at a position near or at the top of the charging chamber 100, and the flue gas inlet is located at a position near or at the bottom of the charging chamber 100, so that the high-temperature flue gas can flow from the bottom to the top of the charging chamber 100 along the stacking direction of the raw materials under the action of the first driving member 33, ensuring that the raw materials in the entire charging chamber 100 can be effectively thermally decomposed. It is true that in other embodiments, the positions of the first flue gas pipe 31 and the flue gas inlet can be mutually reversed, which will not be described herein again.

[0033] Further, the molten metal circulating device 400 comprises a first molten metal pipe 41, a second molten metal pipe 42, and a second driving member 43. The first molten metal pipe 41 is in communication with the charging chamber 100, the second molten metal pipe 42 is in communication with the combustion chamber 200, and the second driving member 43 is connected between the first molten metal pipe 41 and the second molten metal pipe 42 and provides a driving force for the molten metal to flow from the second molten metal pipe 42 to the first molten metal pipe 41. In the embodiment, the second driving member 43 can be a circulating pump, which can be a mechanical circulating pump, an electromagnetic circulating pump, a permanent magnet circulating pump, etc.

[0034] Preferably, the first molten metal pipe 41 is connected at a position near or at the bottom of the charging chamber 100 to flush and smelt the raw materials at the bottom of the charging chamber 100. The advantage of this arrangement is that the stacked raw materials can gradually descend in height with the flushing, and when the raw materials in the charging chamber 100 descend to a certain height, the operator can reopen the charging port 11 and pour raw materials into the charging chamber 100, thereby realizing continuous and uninterrupted feeding and further improving the smelting efficiency.

[0035] Further, since the raw materials can carry some impurities that are difficult to thermally decompose, there can be dross and bottom slag in the molten metal smelted and flowed out of the charging chamber 100. In order to further improve the cleanliness of the molten metal, the smelting device further comprises a treatment chamber 500 connected between the charging chamber 100 and the combustion chamber 200, which is used to process the molten metal smelted out of the charging chamber 100 to perform operations such as slag scraping on the dross and bottom slag in the molten metal.

[0036] The charging chamber 100 and the treatment chamber 500 are separated by a first partition wall 600, and the treatment chamber 500 and the combustion chamber 200 are separated by a second partition wall 700. A plurality of passages for the flow of flue gas and molten metal are formed in the first partition wall 600 and the second partition wall 700, so that the molten metal in the charging chamber 100 can enter the combustion chamber 200 through the treatment chamber 500, and the high-temperature flue gas in the combustion chamber 200 can enter the charging chamber 100 through the treatment chamber 500,

[0037] Specifically, the first partition wall 600 is provided with a first molten metal flow channel 61 connecting the charging chamber 100 and the treatment chamber 500, and the second partition wall 700 is provided with a second molten metal flow channel 71 connecting the treatment chamber 500 and the combustion chamber 200. The first molten metal flow channel 61 and the second molten metal flow channel 71 have a liquid level difference for driving the molten metal to flow from the charging chamber 100 to the combustion chamber 200. The first molten metal flow channel 61 is located at the bottom or near the bottom of the first partition wall 600, and the second molten metal flow channel 71 is located at the bottom or near the bottom of the second partition wall 700, so as to prevent the molten metal in the smelting equipment from being too high, and ensure that the molten metal in the charging chamber 100 flows to the combustion chamber 200 in time.

[0038] The first molten metal flow channel 61 and the second molten metal flow channel 71 are both formed along the horizontal direction, which is convenient for shaping and facilitating the flow of molten metal. The first molten metal flow channel 61 is continuously or discontinuously distributed in the length direction of the first partition wall 600, and the second molten metal flow channel 71 is continuously or discontinuously distributed in the length direction of the second partition wall 700.

[0039] As a preferred embodiment, the first molten metal flow channel 61 is formed between the first partition wall 600 and the bottom surface of the charging chamber 100, and the bottom surface of the charging chamber 100 is higher than the bottom surface of the treatment chamber 500, so as to ensure that the molten metal can flow completely from the charging chamber 100 to the treatment chamber 500, and avoid the residues at the bottom of the molten metal from gathering at the bottom of the charging chamber 100. The bottom of the second molten metal flow channel 71 can be slightly higher than the bottom surface of the treatment chamber 500, so as to prevent the residues from entering the combustion chamber 200, and make the residues gather in the treatment chamber 500, which is convenient for the treatment of the residues. The bottom surface of the treatment chamber 500 can be equal to or slightly higher than the bottom surface of the combustion chamber 200, so as to facilitate the flow of the molten metal from the treatment chamber 500 to the combustion chamber 200.

[0040] The first partition wall 600 is provided with a first flue gas flow channel (not shown), and the second partition wall 700 is provided with a second flue gas flow channel 72. The height of the first flue gas flow channel and the second flue gas flow channel 72 is higher than the highest liquid level of the molten metal, so as to avoid the molten metal from flowing into and blocking the first flue gas flow channel and the second flue gas flow channel 72. The first flue gas flow channel and the second flue gas flow channel 72 are both formed along the horizontal direction. The first flue gas flow channel is continuously or discontinuously distributed in the length direction of the first partition wall 600, and the second flue gas flow channel 72 is continuously or discontinuously distributed in the length direction of the second partition wall 700.

[0041] As a preferred embodiment, the first flue gas channel is located near the bottom of the smelting device, so that the flue gas outlet of the first flue gas channel is near the bottom of the charging chamber 100. The height of the second flue gas channel 72 is consistent with the height of the burner 21, and the burner 21 faces the second flue gas channel 72, so that the high-temperature flue gas sprayed by the burner 21 can be directly sprayed to the second flue gas channel 72, thereby improving the flow effect of the flue gas. In addition, when the second flue gas channel 72 is discontinuously distributed along the length direction of the second partition wall 700, the projection of the second flue gas channel 72 in the horizontal direction is preferably to cover the burner 21, so as to prevent the high-temperature flue gas in the burner 21 from being sprayed to the second partition wall 700.

[0042] Preferably, in order to facilitate the connection of the molten metal circulating device 400, the circumferential side of the combustion chamber 200 protrudes relative to the treatment chamber 500 and the charging chamber 100, so that the side wall of the treatment chamber 500 and / or the charging chamber 100 and the side wall of the combustion chamber 200 form a mounting space 800, and the molten metal circulating device 400 is externally arranged in the mounting space 800.

[0043] Further, the smelting device further comprises a feeding mechanism 900, the feeding mechanism 900 comprises a taking and placing part (not shown in the figure) for taking and placing raw materials, and the feeding mechanism 900 can receive raw materials from the ground and transport the raw materials to the top of the charging chamber 100. When the feeding door 12 at the top of the charging chamber 100 is opened, the taking and placing part puts the raw materials into the charging chamber 100. Since the surface thermal decomposition work of the raw materials will be carried out in the charging chamber 100, harmful gas is easy to be generated and discharged when new raw materials are put in. In order to avoid the above situation, the taking and placing part has a cover body (not shown in the figure), and the cover body can be covered on the outer periphery of the charging port 11. When the feeding door 12 is opened and the raw materials are put in, the charging port 11 is closed by the cover body, so as to avoid the leakage of flue gas.

[0044] The working process of the present application is as follows: before starting the furnace, clean metal materials are added into the combustion chamber 200, and the raw materials to be smelted are stacked in the charging chamber 100, the burner 21 is opened to melt the metal materials; the first driving member 33 is opened, the high-temperature flue gas generated by the combustion chamber 200 enters the charging chamber 100 through the second flue gas flow channel 72 and the first flue gas flow channel in sequence, the oxygen content of the combustion chamber 200 is relatively low, and the high-temperature flue gas does not oxidize the raw materials when washing the raw materials, but can bring heat to decompose the coating on the surface of the raw materials, at the same time, the high-temperature flue gas carrying the decomposed coating enters the combustion chamber 200 through the first flue gas pipeline 31 and the second flue gas pipeline 32 in sequence; when the metal materials are melted to a certain liquid level, the second driving member 43 is opened, the second driving member 43 draws the metal liquid into the charging chamber 100, so that the metal liquid washes and transfers heat to the raw materials at the bottom of the charging chamber 100, in this process, the raw materials are gradually melted and mixed with the original metal liquid, and then enter the combustion chamber 200 through the first metal liquid flow channel 61, the treatment chamber 500 and the second metal liquid flow channel 71, and realize circulating flow through the metal liquid circulating device 400; in this process, the combustion chamber 200 can continuously provide the heat required for washing to the metal liquid, and the workers can process the metal liquid at the treatment chamber 500 to ensure the cleanliness of the metal liquid; when the raw materials in the charging chamber 100 are lowered to a certain height, the charging door 12 is opened, and the raw materials are continuously fed into the charging chamber 100, so that continuous smelting is realized.

[0045] The above is only the embodiment of the present application, and does not limit the patent scope of the present application, any equivalent structure or equivalent process transformation using the content of the present application specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A secondary metal melting and refining apparatus, characterized by comprising: The application relates to a smelting furnace. The smelting furnace comprises: a charging chamber (100) for containing raw materials to be smelted; a combustion chamber (200); a flue gas circulating device (300) connected between the charging chamber (100) and the combustion chamber (200) and used for inputting flue gas in the charging chamber (100) into the combustion chamber (200); and a molten metal circulating device (400) connected between the charging chamber (100) and the combustion chamber (200) and used for inputting molten metal in the combustion chamber (200) into the charging chamber (100). The combustion chamber (200) and the charging chamber (100) are communicated, the combustion chamber (200) can input high-temperature flue gas into the charging chamber (100), and the charging chamber (100) can input molten metal after being melted into the combustion chamber (200). The smelting furnace further comprises a treatment chamber (500), the charging chamber (100) and the treatment chamber (500) are separated by a first partition wall (600), and the treatment chamber (500) and the combustion chamber (200) are separated by a second partition wall (700). The molten metal in the charging chamber (100) can enter the combustion chamber (200) through the treatment chamber (500), the high-temperature flue gas in the combustion chamber (200) can enter the charging chamber (100) through the treatment chamber (500), the first partition wall (600) is provided with a first molten metal flow channel (61) for communicating the charging chamber (100) and the treatment chamber (500), and the second partition wall (700) is provided with a second molten metal flow channel (71) for communicating the treatment chamber (500) and the combustion chamber (200). The first molten metal flow channel (61) and the second molten metal flow channel (71) have a liquid level difference for driving the molten metal to flow from the charging chamber (100) to the combustion chamber (200), the first molten metal flow channel (61) is formed between the first partition wall (600) and the bottom surface of the charging chamber (100), the bottom surface of the charging chamber (100) is higher than the bottom surface of the treatment chamber (500), and the bottom of the second molten metal flow channel (71) is higher than the bottom surface of the treatment chamber (500).

2. The secondary metal melting facility of claim 1, wherein The flue gas circulating device (300) comprises: a first flue gas pipeline (31) communicated with the charging chamber (100); a second flue gas pipeline (32) communicated with the combustion chamber (200); and a first driving member (33) connected between the first flue gas pipeline (31) and the second flue gas pipeline (32) and used for providing driving force for inputting flue gas from the first flue gas pipeline (31) into the second flue gas pipeline (32).

3. The secondary metal melting facility of claim 2, wherein, The raw materials are stacked in the charging chamber (100), the charging chamber (100) is provided with a flue gas inlet, and the first flue gas pipeline (31) and the flue gas inlet are located on two sides of the charging chamber (100) in a stacking direction.

4. The secondary metal melting apparatus of claim 2, wherein The combustion chamber (200) comprises a burner (21), and the second flue gas pipeline (32) is connected to the combustion chamber (200) at a position close to the burner (21).

5. The secondary metal melting facility of claim 1, wherein, The molten metal circulating device (400) comprises: a first molten metal pipeline (41) communicating with the charging chamber (100); a second molten metal pipeline (42) communicating with the combustion chamber (200); and a second driving member (43) connected between the first molten metal pipeline (41) and the second molten metal pipeline (42) and providing a driving force for the molten metal to flow from the second molten metal pipeline (42) to the first molten metal pipeline (41).

6. The secondary metal melting facility of claim 5, wherein, The first molten metal pipeline (41) is connected at a bottom or a position close to the bottom of the charging chamber (100).

7. The secondary metal melting facility of claim 1, wherein, A top of the charging chamber (100) is provided with a charging opening (11), and the charging opening (11) is provided with an openable and closable charging door (12).

8. The secondary metal melting facility of claim 1, wherein, A first flue gas flow channel is arranged between the treatment chamber (500) and the charging chamber (100), and a second flue gas flow channel (72) is arranged between the treatment chamber (500) and the combustion chamber (200), and the heights of the first flue gas flow channel and the second flue gas flow channel (72) are both higher than the highest liquid level of the molten metal.

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