Dual-purpose multi-strand continuous casting induction heating tundish device

Abstract

The invention belongs to the field of induction heating tundishes, and particularly provides a dual-purpose multi-strand continuous casting induction heating tundish device which comprises a heat-resisting inner cladding layer, an outer protection layer is arranged on the outer side of the heat-resisting inner cladding layer, and the heat-resisting inner cladding layer is connected to the inner side of the outer protection layer in a combined mode. A middle heating layer is formed between the outer protection layer and the heat-resistant inner cladding, casting ladle pipes which are connected in a sealed mode are arranged on the two sides of the middle of the inner bottom face of the heat-resistant inner cladding in a penetrating mode, and the bottoms of the casting ladle pipes extend to the position below the bottom face of the outer protection layer in a penetrating mode; according to the method, the air bricks on the inner bottom face of the tundish are comprehensively laid, a heat-resisting inner cladding layer in the tundish can be protected, the tundish is completely prevented from being eroded and damaged by molten metal, the service life of the tundish is prolonged, argon can be injected into all positions in the tundish through laying of the air bricks, and the service life of the tundish is prolonged. And the impurity removal efficiency and quality of the tundish on the internal molten metal are improved.

Description

Technical Field

[0001] The invention relates to the field of induction heating tundish, and in particular to a dual-purpose multi-stream continuous casting induction heating tundish device. Background Art

[0002] A continuous casting machine is a device used for continuous casting of metals. It is mainly used to continuously cast high-temperature liquid metal into ingots with certain end face shapes and size specifications. The working principle of a continuous casting machine is to continuously pour high-temperature molten steel into one or a group of water-cooled copper crystallizers. The molten steel gradually solidifies into a billet shell along the periphery of the crystallizer. When the molten steel level rises to a certain height and the billet shell solidifies to a certain thickness, the straightening machine pulls the billet out and sprays water in the secondary cooling zone to cool the billet completely. The billet is then cut into fixed lengths by the cutting device according to the requirements of steel rolling.

[0003] The device used for storing molten metal in the continuous casting machine and transporting the liquid to multiple sets of water-cooled copper crystallizers is called the tundish. The tundish has high temperature resistance and can store molten metal, stir and mix it in it, and allow the molten metal to merge with materials that enhance the metal's properties.

[0004] During the use of the tundish, its inner bottom surface needs to bear the impact of the molten metal entering it. With the uninterrupted use of the tundish, the heat-resistant layer at the bottom of the tundish will gradually fall off, which makes it difficult for the tundish to have a long service life.

[0005] Therefore, we have made improvements on this and proposed a dual-purpose multi-strand continuous casting induction heating tundish device. Summary of the invention

[0006] The purpose of the present invention is to address the problem that the bottom surface of the existing tundish that is subjected to molten metal will be corroded by high heat and large flow of molten metal, causing damage to the tundish and preventing it from having a long service life.

[0007] In order to achieve the above-mentioned purpose of the invention, the present invention provides the following dual-purpose multi-strand continuous casting induction heating ladle device to improve the above-mentioned problems.

[0008] A dual-purpose multi-stream continuous casting induction heating tundish device comprises a heat-resistant inner cladding, an outer protective layer is arranged on the outer side of the heat-resistant inner cladding, the heat-resistant inner cladding is assembled and connected to the inner side of the outer protective layer, the outer protective layer and the heat-resistant inner cladding are assembled to form an intermediate heating layer, a sealingly connected casting tube is penetrated on both sides of the middle part of the inner bottom surface of the heat-resistant inner cladding, the bottom of the casting tube extends through and extends to below the bottom surface of the outer protective layer, a gas diversion bin is opened on the inner side of the casting tube, the output port of the gas diversion bin is respectively connected to the intermediate heating layer and the inner side of the heat-resistant inner cladding, a breathable brick is embedded in the inner bottom surface of the heat-resistant inner cladding, the position where the bottom surface of the breathable brick is connected to the casting tube is sealed on the outer side of the casting tube, one end of the gas diversion bin connected to the inside of the heat-resistant inner cladding is connected to the inside of the breathable brick, symmetrical circulation pipes are connected on both sides of the top surface of the heat-resistant inner cladding, the upper part of the circulation pipe is connected to the inside of the intermediate heating layer, and the bottom end of the circulation pipe is connected to both sides of the inside of the breathable brick.

[0009] As a preferred technical solution of the present application, symmetrical leakage holes are opened on both sides of the middle part of the inner bottom surface of the heat-resistant inner envelope, a sealing opening is opened on the outer side of the top of the leakage hole, and a combined guardrail is provided on the outer wall of the top of the heat-resistant inner envelope.

[0010] As a preferred technical solution of the present application, an insulating cladding is provided on the inner surface of the external protective layer, a combined embedding groove is opened on the inner side of the top of the insulating cladding, the combined eaves are embedded in the combined embedding groove, and symmetrical pipe clamps are fixed at the centers of both ends of the bottom surface of the external protective layer.

[0011] As a preferred technical solution of the present application, an induction heating coil is arranged equidistantly in the middle of the inner side of the intermediate heating layer, and the induction heating coils are connected in series end to end. A fitted preheating steel plate is provided on the outer surface of the heat-resistant inner cladding above the intermediate heating layer, and an intermediate steel ring is provided between the preheating steel plate and the thermal insulation cladding. The intermediate steel ring is sleeved on the outside of the casting tube, and a spiral coil is sleeved on the outside of the intermediate steel ring, and the spiral coil is connected in series end to end with the induction heating coil.

[0012] As a preferred technical solution of the present application, the casting tube is penetrated into the leakage hole, one end of the casting tube located inside the leakage hole is embedded and sealed on the inner wall of the leakage hole, the bottom end of the casting tube extends to the outside of the bottom of the external protective layer, an insulating conical hole is opened at the center of the casting tube, a brick body matching ring is provided at the top of the casting tube, a sliding sealing ring is provided on the outside of the top of the casting tube, the sliding sealing ring is embedded and lifts up and down to seal and slide on the inner wall of the sealing port, and springs arranged equidistantly in a ring are provided on the inside of the sliding sealing ring.

[0013] As a preferred technical solution of the present application, the gas diversion bin includes a diversion ring fixed on the outer wall of the bottom end of the casting tube, the casting tube is provided with diversion holes arranged in an annular manner and equidistantly outside the heat-insulating conical hole, the top of the diversion hole is connected to the outside of the top of the casting tube, the bottom of the diversion hole is connected to the diversion ring, an intermediate collecting bin is provided in the middle of the diversion hole, the opening position of the intermediate collecting bin is parallel to the intermediate heating layer, a top collecting bin is provided at the top of the casting tube, the top collecting bin is connected to the diversion hole, a bin top sealing cover is provided on the top surface of the top collecting bin, and a bin top sealing cover is provided with top diversion holes distributed in an annular manner and equidistantly.

[0014] As a preferred technical solution of the present application, a horizontal intermediate diversion hole is opened on the outer side of the middle part of the intermediate collecting bin, and the other end of the intermediate diversion hole passes through the intermediate steel ring and connects to the interior of the intermediate heating layer. An argon connecting pipe is connected to one side of the outer wall of the guide ring, and the outer wall of the other end of the argon connecting pipe is embedded in the pipe clamp.

[0015] As a preferred technical solution of the present application, symmetrical matching holes are provided on both sides of the middle part of the air-permeable brick, and the matching holes are sealingly sleeved on the outside of the matching ring of the brick body; the matching holes are provided on the outside of the air-permeable brick and are provided with an inner brick collection bin surrounding the matching holes; the inner brick collection bin is provided on the outside of the air-permeable brick and is provided with longitudinal and transverse overlapping holes; the interior of the longitudinal and transverse overlapping holes is connected with the inner brick collection bin; jet micropores are provided on the top of the longitudinal and transverse overlapping holes; the top of the jet micropores is connected to the outside of the air-permeable brick; the bottom of the inner brick collection bin is located on the bottom surface of the air-permeable brick and is connected to a top bin connecting pipe distributed in an annular manner with equal distances; the bottom end of the top bin connecting pipe seals and slides on the inner wall of the top diversion hole; one end of the top bin connecting pipe located on the inner side of the top diversion hole is connected to an annular box; the outer side of the top surface of the annular box is provided with annular and equidistantly distributed air inlet holes; the top surface of the air inlet holes fits against the inner wall of the bin top sealing cover.

[0016] As a preferred technical solution of the present application, the outer side of the circulation pipe is coated with a heat insulating layer, and a positioning elbow is connected to the position where the top of the circulation pipe is connected to the interior of the intermediate heating layer. A vent hole is opened at the position where the heat-resistant inner cladding is connected to the circulation pipe, and the interior of the vent hole is connected to the interior of the intermediate heating layer. A pipe body connecting nozzle is provided on the top of the vent hole, and the positioning elbow is sealed and sleeved on the outside of the pipe body connecting nozzle. The position where the heat-resistant inner cladding is connected to the circulation pipe is located outside the pipe body connecting nozzle and is limitedly rotated and connected to a limiting nut. A sand powder sealing layer is provided at the bottom between the limiting nut and the pipe body connecting nozzle, and the inner wall of the limiting nut is threadedly connected to the outer wall of the positioning elbow.

[0017] As a preferred technical solution of the present application, one end of the circulation pipe away from the positioning elbow is sealed and connected to the top surface of the air brick, and the position where the air brick is connected to the circulation pipe is provided with collecting bins on both sides, and the tops of the collecting bins on both sides are provided with second micropores arranged equidistantly, and the second micropores are connected to the outer side of the top surface of the air brick, and the circulation pipe is connected to the inside of the collecting bins on both sides.

[0018] Compared with the prior art, the present invention has the following beneficial effects: In the scheme of the present application: by fully laying air-permeable bricks on the bottom surface of the tundish, the heat-resistant inner cladding in the tundish can be protected, the tundish is completely prevented from being corroded and damaged by the molten metal, the service life of the tundish is increased, and the laying of air-permeable bricks can flush argon gas into all positions inside the tundish, thereby improving the efficiency and quality of the tundish in removing impurities from the internal molten metal.

[0019] 1. The present invention divides the tundish into a heat-resistant inner cladding layer and an outer protective layer, and an intermediate heating layer is arranged therebetween. Before the tundish is used, the square spiral coils laid all over can be used to quickly heat the preheated steel plate, so as to complete the overall and uniform heating of the heat-resistant inner cladding layer inside the tundish. When the tundish contacts the molten metal, they can contact at the same temperature, thereby increasing the static pressure of the molten steel and facilitating the stirring and purification of the molten metal.

[0020] 2. The present invention has a gas guide chamber inside the casting tube, which is connected with the air-permeable brick and the interior of the intermediate heating layer respectively. When the intermediate heating layer is heated to preheat the heat-resistant inner blanket, argon gas can be flushed into the intermediate heating layer to improve the safety protection effect inside the intermediate heating layer. At the same time, the argon gas inside the intermediate heating layer is circulated and flushed into the air-permeable brick by a circulation pipe, so that the argon gas can be reused to remove impurities in the molten metal. The middle part of the air-permeable brick is connected to the gas guide chamber, so that argon gas can be flushed into the inner side of the middle part to complete the removal of impurities in the molten metal in the middle of the intermediate bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the overall structure of a dual-purpose multi-strand continuous casting induction heating tundish device provided by the present invention; Figure 2 for Figure 1 The schematic structural diagram of the middle section of the tundish shown; Figure 3 for Figure 2 The schematic structural diagram of the tundish shown is a lateral cross-sectional view of the middle part; Figure 4 for Figure 3 A schematic diagram of the structure of the heat-resistant inner cladding and the outer protective layer decomposed as shown; Figure 5 for Figure 4 A schematic diagram of the structural breakdown of the position of the intermediate heating layer shown; Figure 6 for Figure 3 The structural diagram of the casting tube position shown; Figure 7 for Figure 6 The enlarged schematic diagram of the structure of the casting tube-wrapping position shown; Figure 8 for Figure 7 The structural decomposition diagram of the casting tube position shown; Fig. 9 for Figure 8 The structural section exploded and enlarged schematic diagram of the position of the air-permeable brick shown; Fig.10 for Figure 8 The enlarged schematic diagram of the middle structure of the gas diversion chamber is shown; Fig.11 for Figure 2 The schematic diagram of the structure of the circulation pipe connected to the heat-resistant inner cladding is shown; Fig.12 for Fig.11 The schematic diagram of the structure of the circulation pipe bottom connected to the air brick position is shown.

[0022] In the figure: 1, heat-resistant inner cladding; 11, leakage hole; 12, sealing mouth; 13, combined eaves; 2, external protective layer; 21, heat-insulating cladding; 22, combined embedded groove; 23, pipe clamp; 3, intermediate heating layer; 31, induction heating coil; 32, preheating steel plate; 33, intermediate steel ring; 34, spiral coil; 4, casting tube; 41, heat-insulating conical hole; 42, brick matching ring; 43, sliding sealing ring; 44, spring; 5, gas diversion chamber; 51, diversion ring; 52, diversion hole; 53, intermediate collection chamber; 5 4. Top collecting bin; 55. Bin top sealing cover; 56. Top diversion hole; 57. Middle diversion hole; 58. Argon connecting pipe; 6. Air-permeable brick; 61. Matching sleeve hole; 62. Collecting bin in brick; 63. Vertical and horizontal overlapping holes; 64. Jet micropores; 65. Top bin connecting pipe; 66. Ring box; 67. Air inlet hole; 7. Circulation pipe; 71. Insulation layer; 72. Positioning elbow; 73. Air leakage hole; 74. Pipe body connecting nozzle; 75. Limiting nut; 76. Sand powder sealing layer; 77. Collecting bins on both sides; 78. Second micropore. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] As described in the background art, the bottom surface of the tundish that bears the erosion of the molten metal will be corroded by the high heat and large flow of the molten metal, causing damage to the tundish and preventing it from having a long service life.

[0025] In order to solve this technical problem, the present invention provides a dual-purpose multi-strand continuous casting induction heating tundish device, which is used to improve the service life of the heat-resistant inner cladding inside the tundish, completely isolate the direct contact between the molten metal and the heat-resistant inner cladding, increase the durability of the heat-resistant inner cladding, and at the same time improve the impurity removal efficiency and quality of the molten metal.

[0026] Specifically, please refer to Figure 1-Figure 12 The dual-purpose multi-strand continuous casting induction heating tundish device specifically comprises: A heat-resistant inner envelope 1, an outer protective layer 2 is arranged on the outer side of the heat-resistant inner envelope 1, the heat-resistant inner envelope 1 is combined and connected to the inner side of the outer protective layer 2, and the outer protective layer 2 and the heat-resistant inner envelope 1 are combined to form an intermediate heating layer 3, and a sealed casting tube 4 is penetrated on both sides of the middle of the inner bottom surface of the heat-resistant inner envelope 1, and the bottom of the casting tube 4 extends through and extends to the bottom of the outer protective layer 2, and a gas guide chamber 5 is opened on the inner side of the casting tube 4, and the output ports of the gas guide chamber 5 are respectively The intermediate heating layer 3 and the inner side of the heat-resistant inner blanket 1 are connected, and a breathable brick 6 is embedded in the inner bottom surface of the heat-resistant inner blanket 1. The bottom surface of the breathable brick 6 is connected to the casting tube 4 and is sealed on the outside of the casting tube 4. One end of the gas guide chamber 5 connected to the inside of the heat-resistant inner blanket 1 is connected to the inside of the breathable brick 6. Symmetrical circulation pipes 7 are connected to both sides of the top surface of the heat-resistant inner blanket 1. The upper part of the circulation pipe 7 is connected to the inside of the intermediate heating layer 3, and the bottom end of the circulation pipe 7 is connected to both sides of the inside of the breathable brick 6.

[0027] The present invention provides a dual-purpose multi-strand continuous casting induction heating tundish device, which can protect the heat-resistant inner cladding 1 in the tundish by fully laying air-permeable bricks 6 on the bottom surface of the tundish, completely avoiding the tundish from being corroded and damaged by molten metal, thereby improving the service life of the tundish. The laying of the air-permeable bricks 6 can flush argon gas into all positions inside the tundish, thereby improving the efficiency and quality of the tundish in removing impurities from the internal molten metal.

[0028] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0029] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions in the embodiments may be combined with each other.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] Example 1 Please refer to Figure 1-Figure 12 A dual-purpose multi-strand continuous casting induction heating tundish device, wherein symmetrical leakage holes 11 are opened on both sides of the middle part of the inner bottom surface of the heat-resistant inner cladding 1, a sealing opening 12 is opened on the outer side of the top of the leakage hole 11, and a combined retaining eaves 13 is provided on the outer wall of the top of the heat-resistant inner cladding 1.

[0032] The inner surface of the outer protective layer 2 is provided with an insulating cladding 21 , the inner side of the top of the insulating cladding 21 is provided with a combined embedding groove 22 , the combined eaves 13 is embedded in the combined embedding groove 22 , and symmetrical pipe clamps 23 are fixed at the centers of both ends of the bottom surface of the outer protective layer 2 .

[0033] In the middle of the inner side of the intermediate heating layer 3, an induction heating coil 31 is arranged equidistantly, and the induction heating coils 31 are connected in series end to end. A preheating steel plate 32 is provided on the outer surface of the heat-resistant inner cladding 1 above the intermediate heating layer 3, and an intermediate steel ring 33 is provided between the preheating steel plate 32 and the heat-insulating cladding 21. The intermediate steel ring 33 is sleeved on the outside of the casting cladding tube 4, and a spiral coil 34 is sleeved on the outside of the intermediate steel ring 33. The spiral coil 34 is connected in series end to end with the induction heating coil 31.

[0034] The tundish is divided into a heat-resistant inner cladding layer 1 and an outer protective layer 2, with an intermediate heating layer 3 arranged therebetween. Before the tundish is used, the fully laid square spiral coils 34 can be used to quickly heat the preheating steel plate 32, thereby completing the overall and uniform heating of the heat-resistant inner cladding layer 1 inside the tundish. When the tundish contacts the molten metal, they can contact at the same temperature, thereby increasing the static pressure of the molten steel and facilitating the stirring and purification of the molten metal.

[0035] Example 2 The dual-purpose multi-strand continuous casting induction heating tundish device provided in Example 1 is further optimized. Specifically, Figure 1-Figure 12 The casting tube 4 is penetrated inside the leakage hole 11, and one end of the casting tube 4 located inside the leakage hole 11 is embedded and sealed on the inner wall of the leakage hole 11. The bottom end of the casting tube 4 extends to the outside of the bottom of the external protective layer 2. An insulating conical hole 41 is opened at the center of the casting tube 4. A brick matching ring 42 is provided at the top of the casting tube 4. A sliding sealing ring 43 is provided on the outside of the top of the casting tube 4. The sliding sealing ring 43 is embedded and lifted and sealed to slide on the inner wall of the sealing port 12. The inner side of the sliding sealing ring 43 is provided with springs 44 arranged in an annular shape with equal distances.

[0036] The gas guide bin 5 includes a guide ring 51 fixed on the outer wall of the bottom end of the casting tube 4, and the casting tube 4 is provided with guide holes 52 arranged in an annular manner and equidistantly outside the heat-insulating conical hole 41. The top of the guide hole 52 is connected to the outside of the top of the casting tube 4, and the bottom of the guide hole 52 is connected to the guide ring 51. An intermediate collecting bin 53 is provided in the middle of the guide hole 52, and the position of the intermediate collecting bin 53 is parallel to the intermediate heating layer 3. A top collecting bin 54 is provided at the top of the casting tube 4, and the top collecting bin 54 is connected to the guide hole 52. A bin top sealing cover 55 is provided on the top surface of the top collecting bin 54, and a bin top sealing cover 55 is provided inside with top flow holes 56 distributed in an annular manner and equidistantly.

[0037] A horizontal intermediate diversion hole 57 is opened on the outer side of the middle of the intermediate collecting bin 53, and the other end of the intermediate diversion hole 57 passes through the intermediate steel ring 33 and is connected to the interior of the intermediate heating layer 3. An argon connecting pipe 58 is connected to one side of the outer wall of the guide ring 51, and the outer wall of the other end of the argon connecting pipe 58 is embedded in the tube clamp 23.

[0038] Symmetrical matching sleeve holes 61 are provided on both sides of the middle of the air-permeable brick 6. The matching sleeve holes 61 are sealed and sleeved on the outside of the matching sleeve holes 42 of the brick body. The outside of the matching sleeve holes 61 is located inside the air-permeable brick 6. A brick collection bin 62 surrounding the matching sleeve holes 61 is provided. The outside of the brick collection bin 62 is located inside the air-permeable brick 6. Vertical and horizontal overlapping holes 63 are provided inside the brick collection bin 62. The vertical and horizontal overlapping holes 63 are connected with the brick collection bin 62. A jet micropore 64 is provided at the top of the vertical and horizontal overlapping holes 63. The top of the flow micropore 64 is connected to the outside of the air-permeable brick 6. The bottom of the collecting bin 62 in the brick is located on the bottom surface of the air-permeable brick 6 and is connected to a top bin connecting pipe 65 which is evenly distributed in an annular shape. The bottom end of the top bin connecting pipe 65 is sealed and slides on the inner wall of the top diversion hole 56. One end of the top bin connecting pipe 65 which is located on the inner side of the top diversion hole 56 is connected to an annular box 66. The outer side of the top surface of the annular box 66 is provided with annular evenly distributed air inlet holes 67. The top surface of the air inlet holes 67 is attached to the inner wall of the bin top sealing cover 55.

[0039] The outer side of the circulation pipe 7 is coated with a heat insulating layer 71, and a positioning elbow 72 is connected to the position where the top of the circulation pipe 7 is connected to the interior of the intermediate heating layer 3. An air leak hole 73 is opened at the position where the heat-resistant inner cladding 1 is connected to the circulation pipe 7. The interior of the air leak hole 73 is connected to the interior of the intermediate heating layer 3, and a pipe body connecting nozzle 74 is provided on the top of the air leak hole 73. The positioning elbow 72 is sealingly sleeved on the outside of the pipe body connecting nozzle 74. The position where the heat-resistant inner cladding 1 is connected to the circulation pipe 7 is located outside the pipe body connecting nozzle 74 and is limitedly rotatably connected to a limiting nut 75. A sand powder sealing layer 76 is provided at the bottom between the limiting nut 75 and the pipe body connecting nozzle 74, and the inner wall of the limiting nut 75 is threadedly connected to the outer wall of the positioning elbow 72.

[0040] One end of the circulation pipe 7 away from the positioning elbow 72 is sealed and connected to the top surface of the air brick 6. The position where the air brick 6 is connected to the circulation pipe 7 is provided with collecting bins 77 on both sides. The tops of the collecting bins 77 on both sides are provided with second micropores 78 arranged equidistantly. The second micropores 78 are connected to the outer side of the top surface of the air brick 6, and the circulation pipe 7 is connected to the inside of the collecting bins 77 on both sides.

[0041] A gas guide chamber 5 is provided inside the casting tube 4, which is connected to the air-permeable brick 6 and the interior of the intermediate heating layer 3 respectively. When the intermediate heating layer 3 is heated to preheat the heat-resistant inner blanket 1, argon gas can be flushed into the intermediate heating layer 3 to improve the safety protection effect inside the intermediate heating layer 3. At the same time, the argon gas inside the intermediate heating layer 3 is circulated and flushed into the air-permeable brick 6 through the circulation pipe 7, so that the argon gas can be reused to remove impurities in the molten metal. The middle part of the air-permeable brick 6 is connected to the gas guide chamber 5, so that argon gas can be flushed into the inner side of the middle part to complete the removal of impurities in the molten metal in the middle of the intermediate bag.

[0042] The use process of the dual-purpose multi-strand continuous casting induction heating tundish device provided by the present invention is as follows: Tundish preheating: Start argon gas delivery and energize the induction heating coil 31: During the argon gas transportation process, the argon gas entering the argon connecting pipe 58 will enter the inside of the guide ring 51 through the argon connecting pipe 58. The argon gas is evenly dispersed through the guide ring 51 and first enters the intermediate collecting bin 53 through the guide hole 52. The argon gas entering the intermediate collecting bin 53 will be subjected to pressure and will flow through the intermediate diversion hole 57 to the inside of the intermediate heating layer 3. When the argon gas enters the position of the intermediate heating layer 3, the air inside the intermediate heating layer 3 will be squeezed and flow into the air leakage holes 73 opened on both sides of the top of the heat-resistant inner envelope 1. As the argon gas continuously enters the intermediate heating layer 3, the argon gas will fill the intermediate heating layer 3, so that the intermediate heating layer 3 remains in a safe heating state.

[0043] After the argon gas is flushed into the middle heating layer 3, the subsequent argon gas will continue to enter and transport the argon gas inside the middle heating layer 3 to the inside of the circulation pipe 7. The argon gas enters the collecting bins 77 on both sides of the air brick 6 through the circulation pipe 7. The argon gas is evenly distributed through the collecting bins 77 on both sides, and then transported to the top of the air brick 6 through the second micropores 78.

[0044] After the induction heating coil 31 is energized, as the current is transmitted around the induction heating coil 31, the preheating steel plate 32 arranged on one side of the induction heating coil 31 will be gradually heated by the resistance of the current. After the preheating steel plate 32 is heated, the heat will be conducted to the heat-resistant inner blanket 1, so that the inside of the heat-resistant inner blanket 1 is gradually preheated, and the heat reaches an adaptive temperature for the molten metal to enter the inside of the intermediate package.

[0045] It should be noted that the induction heating coil 31 in the present invention can be set to customize the heating of the heat-resistant inner cladding layer 1 to a desired temperature.

[0046] When the induction heating coil 31 heats the preheating steel plate 32, the spiral coil 34 connected to the middle of the induction heating coil 31 will be energized synchronously to heat the middle steel ring 33. After the middle steel ring 33 is heated, it will heat the argon gas flowing inside the guide hole 52 inside the casting tube 4, so that the temperature of the argon gas is increased, and the argon gas is in a high temperature state when entering the air-permeable brick 6, which can not only heat the air-permeable brick 6, but also quickly complete the temperature adaptation with the metal liquid.

[0047] When the preheating of the tundish is completed, the molten metal will pour from the furnace into the tundish. During the process of the molten metal entering the tundish, it will first contact the air-permeable brick 6 and exert an impact on the air-permeable brick 6. The air-permeable brick 6 will receive pressure to prevent the impact force exerted by the molten metal from eroding the heat-resistant inner blanket 1, thereby increasing the service life of the tundish. The air-permeable brick 6 can serve as a buffer between the molten metal and the heat-resistant inner blanket 1. At the same time, when the air-permeable brick 6 receives the impact pressure, it can push the spring 44 to contract. As the spring 44 contracts, the sliding sealing ring 43 moves downward to complete the sealing of the air-permeable brick 6 and the heat-resistant inner blanket 1.

[0048] During the downward movement of the air brick 6, the top bin connecting pipe 65 on the bottom surface of the air brick 6 will push the annular box 66 to slide. When the annular box 66 slides to the middle of the top collecting bin 54, the air inlet 67 will be separated from the bin top sealing cover 55. At this time, the high-temperature argon gas will instantly pass through the vertical and horizontal overlapping holes 63 and spread throughout the air brick 6, and the argon gas will be ejected outward through the jet micropores 64 on the top surface of the air brick 6. The ejected argon gas will merge into the molten metal, and the impurities in the molten metal will be adsorbed by the argon gas and float to the top of the intermediate package with the buoyancy of the argon gas, thereby completing the purification of the molten metal.

[0049] It should be noted that the design of the jet micro-holes 64 on both sides of the present invention can enable the molten metal to be pushed at all positions of the tundish, thereby achieving comprehensive stirring of the molten metal and avoiding dead zones in the molten steel. At the same time, the upward flow of argon gas can avoid turbulence in the molten metal and improve the stability of the molten metal flowing downward through the casting tube.

[0050] It should be noted that the jet micropores 64 inside the air brick 6 will spray argon gas to the outside when the molten metal comes into contact with it, so the molten metal cannot enter the air brick 6 through the micropores, and the pore diameter of the micropores is smaller than the density of the molten metal, so the molten metal cannot penetrate through the micropores into the air brick 6.

[0051] The jet micropores 64 on the top of the air brick 6 constantly spray high-temperature argon gas, which can completely prevent impurities inside the molten metal from clogging the jet micropores 64. The argon gas heating can soften the impurities, thereby preventing the micropores of the air brick 6 from being clogged, effectively increasing the service life of the air brick 6.

[0052] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A dual-purpose multi-strand continuous casting induction heating tundish device, characterized in that: include: A heat-resistant inner envelope (1), an outer protective layer (2) is arranged outside the heat-resistant inner envelope (1), the heat-resistant inner envelope (1) is assembled and connected to the inner side of the outer protective layer (2), the outer protective layer (2) and the heat-resistant inner envelope (1) are assembled to form an intermediate heating layer (3), a sealingly connected casting tube (4) is penetrated on both sides of the middle of the inner bottom surface of the heat-resistant inner envelope (1), the bottom of the casting tube (4) penetrates and extends to the bottom of the outer protective layer (2), a gas guide chamber (5) is opened inside the casting tube (4), and the gas guide chamber (5) output ports are respectively connected to the gas guide chamber (5) ... The middle heating layer (3) and the inner side of the heat-resistant inner cladding (1) are connected, and a permeable brick (6) is embedded in the inner bottom surface of the heat-resistant inner cladding (1). The bottom surface of the permeable brick (6) is connected to the casting tube (4) and is sealed on the outer side of the casting tube (4). One end of the gas guide chamber (5) connected to the inside of the heat-resistant inner cladding (1) is connected to the inside of the permeable brick (6). Both sides of the top surface of the heat-resistant inner cladding (1) are connected to symmetrical circulation pipes (7). The upper part of the circulation pipe (7) is connected to the inside of the middle heating layer (3), and the bottom end of the circulation pipe (7) is connected to both sides of the inside of the permeable brick (6).

2. The dual-purpose multi-strand continuous casting induction heating tundish device according to claim 1, characterized in that: Symmetrical leakage holes (11) are provided on both sides of the middle of the inner bottom surface of the heat-resistant inner envelope (1), a sealing opening (12) is provided on the outer side of the top of the leakage hole (11), and a combined retaining eaves (13) is provided on the outer wall of the top of the heat-resistant inner envelope (1).

3. The dual-purpose multi-strand continuous casting induction heating tundish device according to claim 2, characterized in that: The inner surface of the outer protective layer (2) is provided with a heat insulating cladding (21), the inner side of the top end of the heat insulating cladding (21) is provided with a combined embedding groove (22), the combined eaves (13) is embedded in the combined embedding groove (22), and symmetrical pipe clamps (23) are fixed at the centers of both ends of the bottom surface of the outer protective layer (2).

4. The dual-purpose multi-strand continuous casting induction heating tundish device according to claim 3, characterized in that: An induction heating coil (31) arranged at equal intervals is provided in the middle of the inner side of the intermediate heating layer (3), and the induction heating coils (31) are connected in series end to end. A preheating steel plate (32) is provided on the outer surface of the heat-resistant inner cladding (1) above the intermediate heating layer (3), and an intermediate steel ring (33) is provided between the preheating steel plate (32) and the heat-insulating cladding (21). The intermediate steel ring (33) is sleeved on the outer side of the casting cladding tube (4), and a spiral coil (34) is sleeved on the outer side of the intermediate steel ring (33), and the spiral coil (34) is connected in series end to end with the induction heating coil (31).

5. The dual-purpose multi-strand continuous casting induction heating tundish device according to claim 2, characterized in that: The casting tube (4) is inserted into the leakage hole (11); one end of the casting tube (4) located inside the leakage hole (11) is embedded and sealed on the inner wall of the leakage hole (11); the bottom end of the casting tube (4) extends to the outside of the bottom of the external protective layer (2); a heat-insulating conical hole (41) is opened at the center of the casting tube (4); a brick body matching ring (42) is provided at the top of the casting tube (4); a sliding sealing ring (43) is provided on the outside of the top of the casting tube (4); the sliding sealing ring (43) is embedded and slides on the inner wall of the sealing port (12) in a lifting and sealing manner; and springs (44) arranged in an annular manner and at equal intervals are provided on the inner side of the sliding sealing ring (43).

6. The dual-purpose multi-strand continuous casting induction heating tundish device according to claim 5, characterized in that: The gas flow guide bin (5) comprises a flow guide ring (51) fixed on the outer wall of the bottom end of the casting tube (4); the casting tube (4) is provided with flow guide holes (52) arranged in an annular manner and equidistantly outside the heat-insulating conical hole (41); the top of the flow guide hole (52) is connected to the outer side of the top of the casting tube (4); the bottom of the flow guide hole (52) is connected to the flow guide ring (51); an intermediate collection bin (53) is provided in the middle of the flow guide hole (52); the opening position of the intermediate collection bin (53) is parallel to the intermediate heating layer (3); a top collection bin (54) is provided at the top of the casting tube (4); the top collection bin (54) is connected to the flow guide hole (52); a bin top sealing cover (55) is provided on the top surface of the top collection bin (54); and a bin top sealing cover (55) is provided inside with top flow distribution holes (56) arranged in an annular manner and equidistantly inside.

7. The dual-purpose multi-strand continuous casting induction heating tundish device according to claim 6, characterized in that: A horizontal intermediate diversion hole (57) is provided on the outer side of the middle of the intermediate collecting bin (53), and the other end of the intermediate diversion hole (57) passes through the intermediate steel ring (33) to communicate with the interior of the intermediate heating layer (3). An argon gas connecting pipe (58) is connected to one side of the outer wall of the guide ring (51), and the outer wall of the other end of the argon gas connecting pipe (58) is embedded in the interior of the pipe clamp (23).

8. The dual-purpose multi-strand continuous casting induction heating tundish device according to claim 4, characterized in that: Symmetrical matching sleeve holes (61) are provided on both sides of the middle of the air-permeable brick (6). The matching sleeve holes (61) are sealed and sleeved on the outside of the matching sleeve holes (42) of the brick body. A brick collection bin (62) surrounding the matching sleeve holes (61) is provided outside the matching sleeve holes (61) and located inside the air-permeable brick (6). A vertical and horizontal overlap hole (63) is provided outside the brick collection bin (62) and located inside the air-permeable brick (6). The vertical and horizontal overlap holes (63) are connected to the brick collection bin (62). A jet micro hole (64) is provided at the top of the vertical and horizontal overlap holes (63). The top of the jet micropore (64) is connected to the outside of the air-permeable brick (6); the bottom of the collecting bin (62) in the brick is located on the bottom surface of the air-permeable brick (6) and is connected to a top bin connecting pipe (65) distributed in an annular manner and at equal intervals; the bottom end of the top bin connecting pipe (65) is sealed and slid on the inner wall of the top diversion hole (56); one end of the top bin connecting pipe (65) located on the inner side of the top diversion hole (56) is connected to an annular box (66); the outer side of the top surface of the annular box (66) is provided with annular air inlet holes (67) distributed in an annular manner and at equal intervals; the top surface of the air inlet holes (67) is in contact with the inner wall of the bin top sealing cover (55).

9. The dual-purpose multi-strand continuous casting induction heating tundish device according to claim 1, characterized in that: The outer side of the circulation pipe (7) is coated with a heat insulating layer (71); a positioning elbow (72) is connected to the position where the top end of the circulation pipe (7) communicates with the interior of the intermediate heating layer (3); an air leakage hole (73) is provided at the position where the heat-resistant inner sheath (1) is connected to the circulation pipe (7); the interior of the air leakage hole (73) communicates with the interior of the intermediate heating layer (3); a pipe body connection nozzle (74) is provided at the top of the air leakage hole (73); the positioning elbow (72) is sealed and sleeved on the outer side of the pipe body connection nozzle (74); the position where the heat-resistant inner sheath (1) is connected to the circulation pipe (7) is located outside the pipe body connection nozzle (74) and is limitedly rotatably connected to a limiting nut (75); a sand powder sealing layer (76) is provided at the bottom between the limiting nut (75) and the pipe body connection nozzle (74); the inner wall of the limiting nut (75) is threadedly connected to the outer wall of the positioning elbow (72).

10. The dual-purpose multi-strand continuous casting induction heating tundish device according to claim 9, characterized in that: One end of the circulation pipe (7) away from the positioning elbow (72) is sealedly connected to the top surface of the air brick (6); the position where the air brick (6) is connected to the circulation pipe (7) is provided with collecting bins (77) on both sides; the tops of the collecting bins (77) on both sides are provided with second micropores (78) arranged at equal intervals; the second micropores (78) are connected to the outer side of the top surface of the air brick (6); and the circulation pipe (7) is connected to the inside of the collecting bins (77) on both sides.

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