Metal melt tundish
By incorporating submerged flow holes, conveying pipes, overflow channels, and slag baffles in the tundish, the problem of oxide scale flowing into the crystallizer was solved, improving casting quality and the service life of the tundish, and ensuring temperature measurement accuracy and liquid level control stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-03-24
AI Technical Summary
In existing continuous casting methods, when the tundish is conveying molten metal, the surface of the easily oxidized melt generates oxide scale, which causes the oxide scale to flow with the melt towards the crystallizer inlet, resulting in slag inclusions inside the product and affecting casting quality. Furthermore, the traditional tundish structure is prone to inaccurate temperature measurement and liquid level control failure.
A molten metal tundish was designed. By setting submerged flow holes, conveying pipes, overflow channels and slag baffles on the side plates, the oxide scale is prevented from entering the buffer area. The inclined slag baffles and liquid level control system prevent oxide scale from flowing into the crystallizer, ensuring temperature measurement accuracy and liquid level stability.
It effectively prevents oxide scale from entering the crystallizer, improves the quality of casting products, extends the service life of the tundish, avoids inaccurate temperature measurement and liquid level control failure, and ensures construction safety.
Smart Images
Figure CN224026479U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of continuous casting tundish, and particularly relates to a metal melt tundish. BACKGROUND
[0002] A tundish is a refractory container commonly used in the process of continuous casting of metal, which is usually a metal container with a refractory lining and is generally rectangular or trapezoidal in shape. In the process of continuous casting, the metal melt is received in the tundish and further flows into a crystallizer to form a casting blank by cooling and solidification in the crystallizer.
[0003] In the prior art, the tundish is only used as a metal melt buffer container between the holding furnace and the crystallizer, and especially for some easily oxidized metal melts, the flow channel and the surface layer of the metal melt in the tundish generate a large number of oxide skins during flow conveying, which continuously flow into the crystallizer inlet along with the melt and easily cause internal slag inclusion of the product. SUMMARY
[0004] The utility model discloses a metal melt tundish which is simple in structure and reasonable in design and solves the above problems.
[0005] The utility model discloses the following technical scheme to realize the above-mentioned purpose:
[0006] A metal melt tundish comprises:
[0007] A bottom plate is provided with side plate one, side plate three, side plate two and side plate four at the upper edge thereof, wherein the side plate one and the side plate two are oppositely arranged, the side plate three and the side plate four are oppositely arranged, and the area surrounded by the bottom plate, the side plate one, the side plate three, the side plate two and the side plate four is a buffer area of the metal melt;
[0008] A subsurface flow hole one is formed in the side plate one, wherein the area above the subsurface flow hole one in the side plate one is a slag blocking area;
[0009] A conveying pipeline is arranged on one side of the side plate three, and the liquid outlet of the conveying pipeline is communicated with the buffer area.
[0010] As a further optimization scheme of the utility model, the hole axis of the subsurface flow hole one is obliquely arranged.
[0011] As a further optimization scheme of the utility model, an overflow channel is arranged on one side of the side plate four, wherein the position of the bottom wall of the through slot of the overflow channel adjacent to one end of the side plate four is higher than the position of the upper end of the hole wall of the subsurface flow hole one.
[0012] As a further optimization scheme of the utility model, the bottom wall of the through slot of the overflow channel is an overflow inclined surface.
[0013] As a further optimization scheme of the utility model, the side plate four is adjacent to the position of the bottom plate and is provided with a flow hole, and the side plate two is provided with a subsurface flow hole two.
[0014] As a further optimization scheme of the utility model, the end surface of the liquid outlet hole of the conveying pipeline is pressed against the end surface of the graphite ring liquid inlet of the crystallizer, and the outer side surface of the side plate one is used for pressing against the end surface of the outlet of the main flow groove.
[0015] As a further optimization scheme of the utility model, the side plate one is fixedly provided with a slag baffle, the slag baffle is adjacent to the subsurface flow hole one and is arranged, and the lower end edge position of the slag baffle is lower than the upper end position of the hole wall of the subsurface flow hole.
[0016] As a further optimization scheme of the utility model, the slag baffle is arranged obliquely, and the upper end position of the slag baffle is arranged close to the side plate one, and the lower end position of the slag baffle is arranged away from the side plate one.
[0017] As a further optimization scheme of the utility model, the upper edge position of the slag baffle is higher than the upper end opening position of the main flow groove.
[0018] As a further optimization scheme of the utility model, the thickness size of the slag baffle gradually decreases from top to bottom.
[0019] The utility model at least has the following beneficial effects: the utility model provides a kind of metal melt tundish, including bottom plate, the buffer area of melt is enclosed by bottom plate and the side plate one, side plate two, side plate three, side plate four being arranged thereon, by the subsurface flow hole one being arranged on side plate one and the conveying pipeline being integrally arranged on side plate three, when the melt conveyed by main flow groove enters buffer area through subsurface flow hole one, realize that side plate one blocks the oxide skin on the surface of melt, and side plate three blocks the oxide skin on the surface of melt in buffer area, realize that oxide skin in melt entering into crystallizer is blocked in multiple stages, avoid the situation that product is in slag inclusion due to oxide skin with melt mass gathering at crystallizer inlet,;
[0020] And the slag baffle is arranged outside subsurface flow hole one, by the obliquely arranged slag baffle, the oxide skin on the surface of melt flowing in main flow groove is blocked by slag baffle, and the contact and friction of oxide skin with side plate one under high temperature condition are blocked, prevent side plate one from being corroded, prolong the service life of tundish;
[0021] And, by the flow guiding of conveying pipeline to melt entering into crystallizer, effectively avoid that melt is conveyed by traditional auxiliary flow groove and overflow to the graphite ring temperature measuring hole on crystallizer, cause that temperature measuring thermocouple is not accurate in temperature measurement;
[0022] In addition, by arranging the overflow channel on the fourth side plate, when the liquid level control system fails to control the subsurface flow hole, the molten metal rising in the liquid level is overflowed through the overflow channel, so that the accident is avoided. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 is the overall structure schematic diagram of the tundish of the utility model;
[0024] Figure 2 is the overall structure schematic diagram of the tundish of the utility model from another perspective;
[0025] Figure 3 is the front view sectional structure schematic diagram of the utility model; Figure 1
[0026] Figure 4 is the installation position schematic diagram of the tundish, the crystallizer, the flow channel and the connected furnace of the utility model;
[0027] Figure 5 is the installation position schematic diagram of the traditional tundish, the crystallizer, the flow channel and the connected furnace;
[0028] Figure 6 is the local sectional structure schematic diagram of the tundish and the flow channel of the utility model;
[0029] Figure 7 is the local sectional structure schematic diagram of the first side plate at the position of the subsurface flow hole one of the utility model.
[0030] In the figure: 1, the first side plate; 11, the subsurface flow hole one; 2, the second side plate; 21, the subsurface flow hole two; 3, the third side plate; 4, the fourth side plate; 41, the discharge hole; 5, the overflow channel; 51, the overflow inclined surface; 6, the conveying pipeline; 7, the bottom plate; 8, the main flow channel; 9, the mounting frame; 10, the connected furnace; 101, the crystallizer; 102, the temperature measuring hole; 103, the graphite ring; 104, the flow passage; 105, the auxiliary flow channel; 106, the slag retaining plate; 111, the support. DETAILED DESCRIPTION
[0031] It is necessary to point out here that the following detailed description is only used to further illustrate the application, and cannot be understood as limiting the protection scope of the application, and the skilled in the art can make some non-essential improvements and adjustments to the application according to the above application content.
[0032] Example 1
[0033] As shown in Figure 1 , Figure 2 and Figure 3 , the utility model provides a kind of metal melt tundish, comprising:
[0034] A bottom plate 7 is provided with side plates one 1, three 3, two 2 and four 4 respectively at the upper edges of the bottom plate 7, wherein the side plates one 1 and two 2 are oppositely arranged, and the side plates three 3 and four 4 are oppositely arranged, and the area surrounded by the bottom plate 7, the side plates one 1, three 3, two 2 and four 4 is a buffer area of the metal melt;
[0035] The side plate one 1 is provided with a submerged flow hole one 11, wherein the area above the submerged flow hole one 11 of the side plate one 1 is a slag blocking area;
[0036] The side plate three 3 is provided with a conveying pipe 6 at one side, and the liquid outlet of the conveying pipe 6 is communicated with the buffer area.
[0037] It should be noted that the conventional tundish structure, such as Figure 5 As shown in the figure, the tundish is fixedly arranged on one side of the connected furnace 10 through a support 111, and the input end and the output end of the tundish are respectively provided with a secondary flow groove 105, the secondary flow groove 105 at the input end is used for being communicated with the main flow groove 8, and the secondary flow groove 105 at the output end is used for being communicated with the crystallizer 101, so that the metal melt directly flows into the buffer area of the tundish through the main flow groove 8, and then further flows into the crystallizer 101, and the process is not blocked by the generated oxide skin, so that the oxide skin is easy to flow into the crystallizer 101 with the melt, and the oxide skin is easy to gather at the entrance of the crystallizer 101, causing the problem of internal slag inclusion of the product, and affecting the casting quality of the product.
[0038] Therefore, in the above embodiment, as shown in Figure 1 and Figure 2 The buffer area surrounded by the bottom plate 7, the side plates one 1, three 3, two 2 and four 4 is a cuboid area. In actual application, as shown in Figure 4 The tundish is arranged on one side of the crystallizer 101, and the tundish is fixedly arranged on one side of the connected furnace 10 through a mounting frame 9, wherein the buffer area is communicated with the crystallizer 101 through the conveying pipe 6, and the buffer area is communicated with the main flow groove 8 through the submerged flow hole one 11, at this time, the area above the submerged flow hole one 11 of the side plate one 1 is the slag blocking area, so that when the metal melt continuously conveyed through the main flow groove 8 is oxidized to generate oxide skin at the uppermost exposed part, the oxide skin is floated on the surface of the melt due to the small density of the oxide skin, and the melt with large density flows below the oxide skin, so that when the melt flows into the buffer area of the tundish through the submerged flow hole one 11, the side plate one 1 effectively prevents the oxide skin from entering the buffer area, and the side plate three 3 above the area of the conveying pipe 6 serves as a slag blocking structure, so as to block the oxide skin impurities outside the entrance of the crystallizer 101, thereby solving the problem that the oxide skin flows into the entrance of the crystallizer 101 with the melt and gathers, causing the problem of internal slag inclusion of the product.
[0039] It should be noted that the molten metal can be aluminum melt, steel melt, iron melt, copper melt, etc., which is not limited here. Exemplarily, in the production technology of producing copper-aluminum composite flat rod by means of core filling continuous casting method, the molten metal is aluminum melt, and the liquid inlet end of the conveying pipeline 6 is the aluminum outlet, and the liquid outlet end of the conveying pipeline 6 is the aluminum inlet connected to the crystallizer 101.
[0040] Moreover, as shown in Figure 4 , the melt in the buffer area is guided into the crystallizer 101 through the conveying pipeline 6, and the edge position of the graphite ring 103 on the crystallizer 101 is reserved enough space for the temperature measuring hole to install the temperature measuring thermocouple, so as to avoid the situation that the traditional tundish (such as Figure 5 ) installation application causes excessive melt to overflow the temperature measuring hole, affecting the temperature measuring accuracy.
[0041] Exemplarily, the hole axis of the first undercurrent hole 11 is inclined, that is, the hole diameter position of the first undercurrent hole 11 outside the first side plate 1 is staggered with the hole diameter position of the first undercurrent hole 11 inside the first side plate 1, as shown in Figure 7 , one of the situations is exemplified, that is, the hole diameter position of the first undercurrent hole 11 outside the first side plate 1 is lower than the hole diameter position of the first undercurrent hole 11 inside the first side plate 1, so that the melt flowing through the first undercurrent hole 11 reduces the flow rate and slowly flows into the buffer area, thereby avoiding the situation that the splash caused by excessive impact force of the melt in the buffer area.
[0042] Exemplarily, continuing to refer to Figure 1 and Figure 3 , one side of the fourth side plate 4 is provided with an overflow channel 5, wherein the through groove bottom wall of the overflow channel 5 is higher than the hole wall upper end position of the first undercurrent hole 11. It should be noted that in order to control the liquid level of the melt in the buffer area of the tundish, a plug connected with the liquid level control system can be arranged in the first undercurrent hole 11 to control the flow rate of the melt, thereby controlling the liquid level of the buffer area. However, in order to avoid the situation that the liquid level control system fails, causing the liquid level of the melt in the buffer area to abnormally rise to the overflow height, the excess melt can be overflowed through the overflow channel 5 to avoid accidents. It should be noted that a receiving container can be arranged at the overflow end of the overflow channel 5 to receive the overflowed melt and ensure the safety of the construction site.
[0043] As shown in Figure 5 , the through groove bottom wall of the overflow channel 5 is an overflow slope 51, which is helpful for guiding the overflowed melt.
[0044] Exemplarily, continuing to refer to Figure 1 and Figure 3The side plate four 4 is provided with a flow hole 41 adjacent to the position of the bottom plate 7, and the side plate two 2 is provided with a submerged flow hole two 21, so that the molten metal in the buffer area of the tundish can be discharged through the flow hole 41 when the production of the casting product is completed. Of course, it should be noted that the flow hole 41 and the submerged flow hole two 21 are in a blocked state during casting. The blocking method can be a plug, a blockage, etc., which is not limited here.
[0045] The submerged flow hole one 11 and the submerged flow hole two 21 are symmetrically arranged. According to the installation position of the tundish and the connected furnace 10, one of them is selected as a through hole communicating with the main flow groove 8, and the other is blocked.
[0046] As shown in Figure 4 , the liquid outlet end surface of the conveying pipe 6 abuts against the liquid inlet end surface of the graphite ring 103 of the crystallizer 101, and the outer side surface of the side plate one 1 is used to abut against the outlet end surface of the main flow groove 8. The outlet of the main flow groove 8 and the liquid inlet end of the graphite ring 103 of the crystallizer 101 are both covered with heat preservation cotton as a leakage protection. The tundish is placed on the mounting rack 9 connected with the connected furnace 10, and is pushed by the pushing device. The tundish is pushed by the pushing device, and the outer side of the side plate two 2 is used to abut against the outlet end of the main flow groove 8. The position of the submerged flow hole one 11 is located at the middle position of the groove bottom of the main flow groove 8. Then, the outer side of the side plate four 4 is pushed to align the liquid outlet end of the conveying pipe 6 with the liquid inlet position of the graphite ring 103 of the crystallizer 101. Then, the tundish is fixed, and the excess heat preservation cotton is cut. It can be seen that the tundish body has a lightweight design, and integrates rapid installation, rapid disassembly and high safety. It does not need to be fixed and installed by means of traditional screws.
[0047] Embodiment 2
[0048] Based on the content of embodiment 1, please continue to refer to Figure 6 , the side plate one 1 is fixedly provided with a slag retaining plate 106, which is arranged adjacent to the submerged flow hole one 11 and the lowermost end edge position of the slag retaining plate 106 is lower than the uppermost end position of the hole wall of the submerged flow hole one 11. The slag retaining plate 106 can block the oxidation skin generated in the molten metal flowing through the main flow groove 8 outside the side plate one 1. The metal melt with high density flows to the submerged flow hole one 11 under the action of gravity. At the same time, the oxidation skin and slag with low density are blocked above the submerged flow hole one 11 by the slag retaining plate 106, thereby improving the slag retaining effect.
[0049] For example, the slag dam 106 is arranged obliquely, and the upper end of the slag dam 106 is arranged close to the side plate 1, and the lower end of the slag dam 106 is arranged away from the side plate 1. The oblique direction can guide the metal melt to flow along the slope of the slag dam 106, so that the oxide scale impurities are gathered above the slope of the slag dam 106, and the impurities are effectively prevented from being taken into the submerged hole 11 by the flowing melt.
[0050] Further, the upper edge of the slag dam 106 is arranged higher than the upper end of the main flow groove 8, and the thickness of the slag dam 106 gradually decreases from top to bottom. The oxide scale does not contact the side plate 1, so that the corrosion of the side plate 1 under high temperature condition is avoided, and the service life of the side plate 1 is prolonged. Further, the upper edge of the slag dam 106 contacts the oxide scale with a large frequency and area, so that the upper end of the slag dam 106 is arranged thick to improve the effect of resisting the erosion and friction of the oxide scale.
[0051] It should be noted that the metal melt tundish is arranged at the side of the crystallizer 101 in use. At this time, the outlet end of the main flow groove 8 is communicated with the submerged hole 11, the submerged hole 2 21 and the flow hole 41 are blocked, and the conveying pipeline 6 is communicated with the liquid inlet of the graphite ring 103 of the crystallizer 101. At this time, the edge of the graphite ring 103 is arranged to reserve enough space for the temperature measuring hole to arrange the temperature measuring thermocouple.
[0052] Then, the metal melt is poured into the groove of the main flow groove 8, and the metal melt flows into the buffer area of the tundish through the submerged hole 11 under the guidance of the main flow groove 8. At this time, the side plate 1 above the submerged hole 11 is used as a slag dam area to block the oxide scale generated by the melt in the main flow groove 8 outside the tundish, and the oxide scale generated in the long-term conveying process of the melt is effectively prevented from being taken into the tundish. Further, the melt is conveyed under the guidance of the conveying pipeline 6, and the melt taken into the crystallizer 101 is further prevented from taking the oxide scale, so that the oxide scale on the surface of the melt is completely blocked outside the inlet of the crystallizer 101.
[0053] Further, the slag dam 106 is arranged at the side of the submerged hole 11, so that the oxide scale with small density is blocked outside the slag dam 106 when the melt in the main flow groove 8 flows. The obliquely arranged slag dam 106 effectively increases the distance between the oxide scale and the submerged hole 11, increases the difficulty of the oxide scale entering the submerged hole 11, and blocks the contact and friction of the oxide scale under high temperature condition with the side plate 1, so that the side plate 1 is prevented from being corroded and rubbed, and the service life of the side plate 1 is prolonged.
[0054] In addition, when the liquid level control system fails, the overflow melt can be discharged from the tundish in time through the overflow channel 5, so that accidents are avoided.
[0055] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that, for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which all belong to the protection scope of the present application.
Claims
1. A tundish for molten metal, characterized in that, include: The bottom plate (7) has side plates 1 (1), 3 (3), 2 (2) and 4 (4) respectively arranged on its upper edge. The side plates 1 (1) and 2 (2) are arranged opposite to each other, and the side plates 3 (3) and 4 (4) are arranged opposite to each other. The area surrounded by the bottom plate (7), side plates 1 (1), 3 (3), 2 (2) and 4 (4) is a buffer area for molten metal. The side plate (1) is provided with a subsurface flow hole (11), wherein the area of the side plate (1) above the subsurface flow hole (11) is a slag-blocking area; A conveying pipe (6) is provided on one side of the side plate three (3), and the liquid outlet of the conveying pipe (6) is connected to the buffer area.
2. The tundish for molten metal according to claim 1, characterized in that, The centerline of the hole of the subsurface flow hole (11) is set at an angle.
3. A tundish for molten metal according to claim 2, characterized in that, An overflow channel (5) is provided on one side of the side plate four (4), wherein the bottom wall of the overflow channel (5) is located at one end of the side plate four (4) at a position higher than the upper end of the hole wall of the submerged flow hole one (11).
4. A tundish for molten metal according to claim 3, characterized in that, The bottom wall of the overflow channel (5) is an overflow slope (51).
5. A molten metal intermediate ladle according to claim 4, characterized in that, The side plate four (4) has a discharge hole (41) near the bottom plate (7), and the side plate two (2) has a submersible hole two (21).
6. A tundish for molten metal according to claim 5, characterized in that, The liquid outlet end face of the conveying pipe (6) is pressed against the liquid inlet end face of the graphite ring (103) of the crystallizer (101), and the outer side of the side plate (1) is pressed against the outlet end face of the main channel (8).
7. A tundish for molten metal according to claim 6, characterized in that, A slag baffle (106) is fixedly installed on the side plate (1). The slag baffle (106) is installed near the subsurface flow hole (11), and the lowermost edge of the slag baffle (106) is lower than the uppermost position of the hole wall of the subsurface flow hole.
8. A tundish for molten metal according to claim 7, characterized in that, The slag baffle (106) is inclined, with the upper end of the slag baffle (106) positioned close to the side plate (1) and the lower end of the slag baffle (106) positioned away from the side plate (1).
9. A tundish for molten metal according to claim 8, characterized in that, The upper edge of the baffle plate (106) is higher than the upper opening of the main channel (8).
10. A tundish for molten metal according to claim 9, characterized in that, The thickness of the slag baffle (106) gradually decreases from top to bottom.