A furnace for use in a continuous casting process

Abstract

The application provides a furnace applied to a continuous casting process and belongs to the technical field of furnaces. The furnace comprises a furnace body, the furnace body is internally provided with a first furnace chamber, a second furnace chamber and a third furnace chamber which are sequentially communicated, the first furnace chamber is internally provided with a first heating device for melting materials, and the third furnace chamber is internally provided with a second heating device for heat preservation of molten liquid. The third furnace chamber is provided with a to-be-coated product inlet and a to-be-coated product outlet which are oppositely arranged, and the to-be-coated product outlet is connected with a first crystallizer for penetrating the to-be-coated product. The furnace applied to the continuous casting process is beneficial to stably maintaining the temperature and pressure of the solution in the furnace chamber where the crystallizer is located, thereby being beneficial to guaranteeing the coating effect.

Description

Technical Field

[0001] This invention relates to the field of furnace equipment technology, and more specifically to a furnace used in continuous casting processes. Background Technology

[0002] When using continuous casting to manufacture copper-clad steel bimetallic materials, the production process is as follows: a cleaned steel core is passed through molten copper, and then the outer surface of the steel core is covered with a certain thickness of copper by the cooling effect of the crystallizer.

[0003] When using this method, the copper liquid used to coat the steel core needs to maintain a stable temperature and pressure. Due to the consumption of copper liquid by the steel core extending into the copper liquid and the replenishment of new copper liquid, the temperature and pressure of the copper liquid are prone to fluctuation. When the temperature and pressure of the copper liquid are unstable, coating errors are likely to occur, resulting in uneven thickness of the coated copper liquid. Summary of the Invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that are prone to coating errors due to the instability of the temperature and pressure of the copper liquid, thereby providing a furnace for continuous casting process.

[0005] To address the aforementioned problems, the present invention provides a furnace for continuous casting processes, comprising: a furnace body, wherein the furnace body has a first furnace chamber, a second furnace chamber, and a third furnace chamber connected in sequence, wherein a first heating device for melting materials is provided in the first furnace chamber, and a second heating device for heat preservation of the molten liquid is provided in the third furnace chamber;

[0006] The third furnace chamber is provided with an inlet and an outlet for the product to be coated, which are arranged opposite to each other. The outlet for the product to be coated is connected to a first crystallizer for passing through the product to be coated.

[0007] Furthermore, the linings of the first, second, and third furnace chambers are made of refractory bricks.

[0008] Furthermore, the first crystallizer is connected to the first support member, which is a brick structure with a central perforation. The first crystallizer is inserted into the perforation of the first support member and then secured by a locking mechanism.

[0009] Furthermore, the first support member is embedded in the refractory bricks of the lining of the third furnace.

[0010] Furthermore, a second crystallizer for passing through the product to be coated is connected to the inlet of the third furnace chamber. The second crystallizer is fixed to a second support member, which is a brick structure with a central perforation. The second crystallizer is inserted into the perforation of the second support member and then fixed in place.

[0011] Furthermore, the second support member is embedded in the refractory bricks of the lining of the third furnace.

[0012] Furthermore, the first support member and the second support member are spaced apart by a constraint member, which is a shaped brick with a limiting step.

[0013] Furthermore, the space between the outer shell and the inner lining of the furnace body is filled with ramming material.

[0014] Furthermore, a heat-insulating material is provided between the ramming material and the outer shell of the furnace body.

[0015] Furthermore, the first furnace chamber and the second furnace chamber are connected by a first graphite connector, and the second furnace chamber and the third furnace chamber are connected by a second graphite connector. The first graphite connector and the second graphite connector are respectively located at the bottom of the second furnace chamber.

[0016] The technical solution of this invention has the following advantages:

[0017] 1. The furnace provided by the present invention for continuous casting process separates the first furnace chamber and the third furnace chamber by setting a second furnace chamber, thereby avoiding the impact of the new material molten in the first furnace chamber directly entering the third furnace chamber and causing impact on the molten liquid in the third furnace chamber, which is conducive to ensuring the stability of the temperature and pressure of the molten liquid in the third furnace chamber; the crystallizer is directly connected to the third furnace chamber, and since the third furnace chamber maintains the stability of the molten liquid used to coat the product at all times, the coating effect of the crystallizer can also be guaranteed.

[0018] 2. The furnace for continuous casting process provided by the present invention uses a first support member to install a first crystallizer into a third furnace chamber, and uses a second support member to install a second crystallizer into a third furnace chamber. The first support member and the second support member are connected by a constraint member for limiting and securing, which avoids the first support member and the second support member from shifting axially, thereby facilitating the covering effect of the crystallizer in the third furnace chamber.

[0019] 3. The furnace for continuous casting provided by the present invention, by setting a second furnace chamber, can further perform deoxygenation of the solution, thus avoiding the effect of coating due to the presence of oxygen in the solution in the third furnace chamber.

[0020] 4. The furnace for continuous casting provided by the present invention, by setting a first crystallizer at the outlet of the third furnace chamber and a second crystallizer at the inlet for cladding work, is beneficial to calibrating and improving the coaxiality of the products entering the furnace, thereby reducing cladding error. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional view of a furnace used in the continuous casting process in an embodiment of the present invention;

[0023] Figure 2 This is a top view of a furnace used in the continuous casting process in an embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional schematic diagram of the second crystallizer in an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the constraint component in an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the assembly of the first crystallizer and the sleeve in an embodiment of the present invention.

[0027] Explanation of reference numerals in the attached figures:

[0028] 1. First furnace chamber; 2. Second furnace chamber; 3. Third furnace chamber; 4. Refractory bricks; 5. Ramming mix;

[0029] 11. First graphite communicating vessel; 12. Annular welded channel; 13. Straight welded channel; 14. Iron core; 15. Insulating plate; 16. Water jacket; 17. Copper coil; 21. Second graphite communicating vessel;

[0030] 31. First crystallizer; 32. First support member; 33. Constraint member; 34. Second support member; 35. Second crystallizer; 311. Sleeve; 312. Inner liner; 331. Limiting step; 313. Core-setting mold. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0034] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0035] This embodiment provides a furnace for use in continuous casting processes.

[0036] like Figure 1 As shown, the furnace described in this embodiment includes a furnace body, which has a first furnace chamber 1, a second furnace chamber 2, and a third furnace chamber 3 connected in sequence. The first furnace chamber is provided with a first heating device for melting materials, and the third furnace chamber 3 is provided with a second heating device for keeping the molten liquid warm. The third furnace chamber 3 is provided with an inlet for the product to be coated and an outlet for the product to be coated, which are arranged opposite to each other. A first crystallizer 31 for passing through the product to be coated is connected to the outlet for the product to be coated.

[0037] Here, by setting up a second furnace chamber 2 to separate the first furnace chamber 1 and the third furnace chamber 3, the newly melted material from the first furnace chamber 1 is prevented from directly entering the third furnace chamber 3 and impacting the molten liquid in the third furnace chamber 3, which helps to ensure the stability of the temperature and pressure of the molten liquid in the third furnace chamber 3. The crystallizer is directly connected to the third furnace chamber 3, and since the third furnace chamber 3 maintains the stability of the molten liquid used to coat the product at all times, the coating effect of the crystallizer can also be guaranteed.

[0038] It should be noted that, for the aforementioned coated products, this embodiment illustrates the production of copper-clad steel bimetallic materials. The production process involves: a clean steel core being horizontally passed through molten copper in a copper melting furnace, and copper of a certain thickness being continuously cast at the outlet using a horizontally installed crystallizer. As an alternative implementation, this furnace can also be used to produce other coated products formed using a hot-dip galvanizing process.

[0039] like Figure 1 As shown, in this embodiment, the first furnace chamber 1, the second furnace chamber 2, and the third furnace chamber 3 are lined with refractory bricks 4, and ramming material 5 is filled between the furnace chamber and the refractory bricks 4 to provide good insulation and support. Here, the ramming material 5 can be a readily available and mature refractory monolithic ramming material. Furthermore, another layer of refractory bricks 4 is laid between the outer shell of the furnace body and the ramming material 5. The refractory bricks 4 located on the inner side of the furnace chamber are in direct contact with the molten copper; a layer of asbestos is laid outside the refractory bricks 4 located on the outer side to enhance the insulation effect of the furnace body. Here, the direction outward from the center of the furnace body is the outer direction in this embodiment, and the direction from the outer shell of the furnace body towards the center is the inner direction in this embodiment.

[0040] In this embodiment, the tops of the first furnace chamber 1, the second furnace chamber 2, and the third furnace chamber 3 are all equipped with furnace covers to facilitate the addition of solid copper material or deoxidizing material into the furnace chamber. A first heating device is connected below the first furnace chamber 1 and includes an annular molten groove 12. The annular molten groove 12 is connected to the first furnace chamber 1 through a straight molten groove 13 to facilitate heat exchange between the molten solution and the copper material located in the first furnace chamber 1.

[0041] Still Figure 1 As shown, an electromagnetic induction component is provided in the annular molten groove 12. The electromagnetic induction component includes an iron core 14, an insulating plate 15 and a water jacket 16 arranged sequentially from the inside to the outside. A copper coil 17 passes through the center of the iron core 14 and is arranged around the molten groove on both sides. After the copper coil 17 is energized, it is subjected to electromagnetic induction, and the molten solution rotates clockwise in the annular molten groove 12 and exchanges heat with the copper material in the first furnace chamber 1.

[0042] Furthermore, the second heating device is connected below the third furnace chamber 3. The second heating device can be configured similarly to the first heating device to heat or maintain the temperature of the molten copper inside the third furnace chamber 3. As an alternative implementation, the second heating device can also employ other heating methods, as long as they ensure that the molten copper inside the third furnace chamber 3 remains within a stable temperature range.

[0043] like Figure 1As shown, in this embodiment, the first furnace chamber 1 and the second furnace chamber 2 are connected by a first graphite connector 11, and the second furnace chamber 2 and the third furnace chamber 3 are connected by a second graphite connector 21. Using graphite connectors to connect the first furnace chamber 1, the second furnace chamber 2, and the third furnace chamber 3 can protect the molten copper inside the furnace from oxidation and can reduce copper oxide and cuprous oxide, thereby ensuring the coating effect of the steel core. Here, the first graphite connector 11 and the second graphite connector 21 are respectively located at the bottom of the second furnace chamber 2 to avoid the addition of oxygen-degrading impurities floating on the molten copper.

[0044] In this embodiment, combustible deoxygenating materials, such as charcoal, are placed in the second furnace chamber 2. Setting up the second furnace chamber 2 can avoid interference from the deoxygenating materials placed in the first furnace chamber 1 during the heating process, which would affect the convection effect of the copper liquid. As an alternative implementation, deoxygenating materials can be placed in the first furnace chamber 1, the second furnace chamber 2, and the third furnace chamber 3 to enhance the deoxygenation effect in the furnace chamber.

[0045] In this embodiment, the first crystallizer 31 is provided with an interface suitable for inputting inert gas. By inputting inert gas into the first crystallizer 31, air can be prevented from being introduced into the steel core when it enters the furnace, thereby avoiding affecting the normal coating effect.

[0046] like Figure 3 As shown, a core-fixing mold 313 is provided on the second crystallizer 35 to constrain the coating thickness of the product to be coated. One end of the core-fixing mold 313 faces the interior of the furnace 1. The core-fixing mold 313 is detachably connected to the inner wall of the second crystallizer 35. Specifically, the core-fixing mold 313 can be a high-precision mold made of ceramic material. An annular groove is provided on the inner wall of the second crystallizer 35, and the core-fixing mold 313 is embedded in the annular groove. After the steel core to be coated enters the second crystallizer 35, the coating thickness of the copper liquid is constrained by the core-fixing mold 313, thereby effectively maintaining the coaxiality of the steel core and the uniformity of the copper layer coating. Here, the core-fixing mold 313 is detachably provided on the second crystallizer 35. When the core-fixing mold 313 is worn by the steel core, affecting the uniformity of the copper layer coating, the old core-fixing mold 313 can be removed and replaced with a new core-fixing mold 313, which helps to maintain the uniformity of the copper coating on the steel core.

[0047] For cost and ease of assembly considerations, it is preferred that the first crystallizer 31 is provided with an inert gas interface but not with a core-setting mold 313, and the second crystallizer 35 is provided with a core-setting mold 313 but not with an inert gas interface. As an alternative implementation, the first crystallizer 31 and the second crystallizer 35 can use the same crystallizer product, that is, both are provided with an inert gas interface and a core-setting mold 313, with the first crystallizer 31 only using the inert gas interface and the second crystallizer 35 only using the core-setting mold 313 function.

[0048] like Figure 2 As shown, in this embodiment, the first crystallizer 31 is connected to the first support member 32. The first support member 32 is a brick structure with a central perforation. The first crystallizer 31 is inserted into the perforation of the first support member 32 and then secured by a locking mechanism. Specifically, the first support member 32 is embedded in the refractory bricks 4 lining the third furnace chamber 3. Since ramming material 5 is filled between the two layers of refractory bricks 4 in the furnace chamber, the outer wall of the first support member 32 is pressed and tightened by the ramming material 5, and both ends of the first support member 32 are pressed and tightened by the refractory bricks 4, thereby forming a fixed state of the first support member 32 in the third furnace chamber 3.

[0049] like Figure 2 and Figure 5 As shown, in this embodiment, the first crystallizer 31 and the first support member 32 are connected by a sleeve 311. One end of the sleeve 311 is engaged with the outer boss of the first crystallizer 31. The sleeve 311 and the first support member 32 are interference-fitted, which fixes the first crystallizer 31 and the first support member 32 and prevents the first crystallizer 31 from moving axially inward or outward. Here, the part of the first crystallizer 31 used for passing through the outlet of the product to be coated in the third furnace 3 is fitted with an inner liner 312 to provide protection and heat preservation.

[0050] Based on the structure of the first crystallizer 31, in this embodiment, a second crystallizer 35 for passing through the product to be coated is connected to the inlet of the third furnace 3. The second crystallizer 35 is fixed to the second support member 34, which is a brick structure with a central perforation. The second crystallizer 35 is inserted into the perforation of the second support member 34 and then fixedly connected. Specifically, the second support member 34 is embedded in the refractory bricks 4 lining the third furnace 3. Since ramming material 5 is filled between the two layers of refractory bricks 4 in the furnace, the outer wall of the second support member 34 is pressed and tightened by the ramming material 5, and the two ends of the second support member 34 are pressed and tightened by the refractory bricks 4, thereby forming a fixed state of the second support member 34 in the third furnace 3.

[0051] It should be noted that the fixing method between the second crystallizer 35 and the second support member 34 can be the same as the fixing method between the first crystallizer 31 and the first support member 32 described above. The first crystallizer 31 and the second crystallizer 35 can center the incoming steel core, making it coaxial with the crystallizer, thereby helping to reduce coating errors.

[0052] like Figure 2 and Figure 4As shown, in this embodiment, the first support member 32 and the second support member 34 are spaced apart by a constraint member 33. The constraint member 33 is a shaped brick with limiting steps 331 formed at both ends. Here, the opposite end faces of the first support member 32 and the second support member 34 are both right angle surfaces. The limiting steps 331 on the shaped brick are respectively engaged with the two right angle surfaces, so that the shaped brick abuts against the first support member 32 and the second support member 34 respectively. Since the shaped brick itself is a rigid brick body, the first support member 32 and the second support member 34 are constrained by the shaped brick after abutting, thereby preventing relative movement between the two, which is beneficial to ensuring the installation and fixing state of the first crystallizer 31 and the second crystallizer 35.

[0053] Working principle:

[0054] The first and second heating devices are activated, and solid copper material is added into the first furnace chamber 1. The molten copper flows through the second furnace chamber 2 into the third furnace chamber 3. Since the second heating device is connected to the bottom of the third furnace chamber 3, the molten copper can maintain a stable liquid phase in the third furnace chamber 3. The steel core is inserted through the inlet of the product to be coated. Under the action of the first crystallizer 31, a copper-coated steel core is formed. When it exits with the product to be coated at the outlet, the copper coating process is carried out again under the action of the second crystallizer 35. The copper-coated steel core after exiting is used for the next process.

[0055] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A furnace for use in continuous casting processes, characterized in that, include: The furnace body has a first furnace chamber (1), a second furnace chamber (2) and a third furnace chamber (3) connected in sequence. The first furnace chamber (1) is provided with a first heating device for melting materials, and the third furnace chamber (3) is provided with a second heating device for heat preservation of the molten liquid. The third furnace (3) is provided with an inlet and an outlet for the product to be coated, which are arranged opposite to each other. The inlet for the product to be coated is connected to a first crystallizer (31) for passing through the product to be coated. The first crystallizer (31) is provided with an interface suitable for inputting inert gas. The outlet for the product to be coated is connected to a second crystallizer (35) for passing through the product to be coated. The second crystallizer (35) is provided with a core-fixing mold (313) for constraining the coating thickness of the product to be coated. One end of the core-fixing mold (313) is arranged facing the inside of the furnace. The core-fixing mold (313) is detachably connected to the inner wall of the second crystallizer (35). The first crystallizer (31) is connected to the first support member (32), which is a brick structure with a central perforation. The first crystallizer (31) is inserted into the perforation of the first support member (32) and then connected by a locking mechanism. The first support member (32) is embedded in the lining of the third furnace chamber (3); The second crystallizer (35) is fixed on the second support member (34). The second support member (34) is a brick structure with a central perforation. The second crystallizer (35) is inserted into the perforation of the second support member (34) and then connected by a locking mechanism. The second support member (34) is embedded in the lining of the third furnace chamber (3); The first support member (32) and the second support member (34) are spaced apart by a constraint member (33).

2. The furnace for continuous casting process according to claim 1, characterized in that, The inner linings of the first furnace chamber (1), the second furnace chamber (2) and the third furnace chamber (3) are refractory bricks (4).

3. The furnace for continuous casting process according to claim 1, characterized in that, The constraint member (33) is a brick with a limiting step (331).

4. The furnace for continuous casting process according to any one of claims 1-3, characterized in that, The furnace body is filled with ramming material (5) between the outer shell and the inner lining.

5. The furnace for continuous casting process according to claim 4, characterized in that, A heat-insulating material is provided between the ramming material (5) and the outer shell of the furnace body.

6. The furnace for continuous casting process according to any one of claims 1-3, characterized in that, The first furnace chamber (1) and the second furnace chamber (2) are connected by a first graphite connector (11), and the second furnace chamber (2) and the third furnace chamber (3) are connected by a second graphite connector (21). The first graphite connector (11) and the second graphite connector (21) are respectively located at the bottom of the second furnace chamber (2).

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