A protective slag adding device

Abstract

The utility model provides a protective slag adding device. The protective slag adding device of the utility model comprises a plurality of mutually connected tube bodies, a heater connected to the tube bodies, and a slag discharge pipe with an outlet arranged above the crystallizer, the plurality of tube bodies surround a slag storage space with a slag outlet, the plurality of tube bodies are arranged circumferentially along the slag storage space, the slag discharge pipe is connected to the slag outlet, the heater is arranged above the tundish, and a heating medium is arranged inside the heater and inside the tube body. The utility model can introduce the heat of the molten steel in the tundish into the protective slag for baking, thereby saving a lot of resources.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous casting machines, in particular to a protective slag adding device. Background Art

[0002] The continuous casting machine is a set of equipment that turns molten steel into billets. The crystallizer is the core of the equipment. The molten steel solidifies in the crystallizer to form a billet shell of a certain thickness. After the billet with the liquid core is pulled out of the crystallizer, it continues to be sprayed with water for cooling in the fan-shaped support until it is completely solidified. During the billet production process, it is also necessary to add protective slag to the upper surface of the molten steel in the crystallizer to play the role of heat conduction, lubrication, heat preservation and oxidation prevention.

[0003] However, the protective slag is easily damp and agglomerated, and the bubbles formed by water vapor are harmful to steel. Water decomposes into hydrogen and oxygen, which are also harmful elements. Therefore, the protective slag should be kept as dry as possible, with a moisture content of ≤0.5%. Most companies use the heat generated by coal burning to bake the protective slag through other devices, which increases energy consumption costs and causes waste of resources. Utility Model Content

[0004] In view of this, the utility model aims to provide a protective slag adding device, which can introduce the heat of molten steel in the tundish into the protective slag for baking, thereby saving a lot of resources.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A mold slag adding device comprises a plurality of mutually connected tubes, a heater connected to the tubes, and a slag discharge pipe with an outlet arranged above a crystallizer;

[0007] The multiple tube bodies surround a slag storage space with a slag outlet, the multiple tube bodies are arranged along the circumference of the slag storage space, the slag discharge pipe is connected to the slag outlet, the heater is arranged above the tundish, and heating medium is provided inside the heater and the tube body.

[0008] Furthermore, the heating medium is oil or water.

[0009] Furthermore, a conical tube is provided between the slag outlet and the slag discharge pipe, an end of the conical tube with a larger diameter is connected to the slag outlet, and an end of the conical tube with a smaller diameter is connected to the slag discharge pipe.

[0010] Furthermore, it also includes rotating a baffle disposed inside the slag tapping pipe, a vibrating rod disposed on the crystallizer, and a hanging rope disposed on the vibrating rod;

[0011] The side walls around the baffle are overlapped with the inner wall of the slag discharge pipe, and the other end of the suspension rope passes downward through the slag discharge pipe and is connected with the upper part of the baffle.

[0012] Furthermore, a winch is provided on the vibration rod, and the suspension rope is wound around the winch.

[0013] Furthermore, an adjustment plate is provided at the outlet of the slag discharge pipe, and the adjustment plate is used to change the size of the outlet.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] The protective slag adding device of the utility model adopts a plurality of tube bodies to surround a slag storage space, and then introduces the heat of the molten steel in the tundish into the plurality of tube bodies through a heater and an internal heating medium, so that the surrounding area of ​​the slag storage space is at a higher temperature, thereby making the slag storage space at a higher temperature, and the temperature is not easy to lose, and finally the protective slag can be baked at a higher temperature, thereby minimizing the moisture in the protective slag and reducing resource waste.

[0016] Secondly, a conical tube is arranged between the slag outlet and the slag discharge pipe, and the end with a smaller diameter of the conical tube is connected to the slag discharge pipe downward. After the protective slag is placed in the slag storage space, the protective slag can slide into the slag discharge pipe better along the inclined inner wall of the conical tube by relying on its own gravity.

[0017] Furthermore, by setting a baffle inside the slag discharge pipe, connecting a vibrating rod to the crystallizer, and using the suspension rope on the vibrating rod to pass through the slag discharge pipe downward to hang the baffle, when the crystallizer vibrates, the vibrating rod can lift the baffle upward through the suspension rope, and then lower the baffle, and repeat this process continuously and evenly. In this process, after the baffle is lifted upward, it can be separated from the overlap with the inner wall of the slag discharge pipe, so that the protective slag can fall into the crystallizer along the slag discharge pipe by gravity, and the process of adding protective slag can be completed without relying on other power. The use of this structure to add protective slag has a low production cost, does not require expensive equipment costs, and is superior to the process of manually adding protective slag.

[0018] Finally, by changing the length of the suspension rope by the winch, shortening the suspension rope, the baffle plate can be controlled to completely separate from the inner wall of the slag discharge pipe, and all the protective slag can be dropped at one time. After the length of the suspension rope is increased, the baffle plate will not separate from the inner wall of the slag discharge pipe when the vibration rod vibrates. This arrangement can improve the applicability of the device and better control the addition of protective slag. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which constitute part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention. The directional terms such as front and back, top and bottom involved therein are only used to indicate relative positional relationships and do not constitute improper limitations on the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the slag storage space formed by the pipe body of the utility model;

[0022] Figure 3 It is a schematic diagram of the connection structure of the winch and the suspension rope on the vibration rod of the utility model;

[0023] Figure 4 It is a cross-sectional view of the upper adjustment plate of the slag discharge pipe of the utility model;

[0024] Description of reference numerals:

[0025] 1. Tube body; 2. Heater; 3. Slag discharge pipe; 4. Slag outlet; 5. Slag storage space; 6. Tundish; 7. Conical cylinder; 8. Baffle; 9. Vibrating rod; 10. Lifting rope; 11. Capstan; 12. Filling port; 13. Crystallizer; 14. Adjustment plate. DETAILED DESCRIPTION

[0026] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0027] In the description of the present invention, it should be noted that if terms such as "upper", "lower", "inner", "back" or the like indicating orientation or position relationship appear, they are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; if terms such as "first" or "second" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection", and "connector" should be understood in a broad sense. For example, the connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0029] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0030] This embodiment relates to a protective slag adding device, an exemplary structure of which is as follows: Figure 1-4 shown.

[0031] First, it should be noted that the continuous casting machine casts molten steel into steel billets through the crystallizer 13 , and the molten steel flows into the crystallizer 13 through the tundish 6 .

[0032] Overall, if Figure 1-2 As shown, the protective slag adding device includes a plurality of mutually connected tube bodies 1, a heater 2 connected to the tube bodies 1, and a slag discharge pipe 3 with an outlet located above the crystallizer 13.

[0033] A plurality of tube bodies 1 surround a slag storage space 5 having a slag outlet 4, the plurality of tube bodies 1 are arranged circumferentially along the slag storage space 5, the slag discharge pipe 3 is connected to the slag outlet 4, the heater 2 is arranged above the tundish 6, and a heating medium is arranged inside the heater 2 and inside the tube body 1. The device is fixed at the position of the tundish 6, the plurality of tube bodies 1 are arranged vertically, and the plurality of tube bodies 1 are interconnected. After the plurality of tube bodies 1 surround the slag storage space 5, the slag storage space 5 has upper and lower openings, the upper opening is a filling port 12, and protective slag can be filled into the slag storage space 5 through the upper opening, and the lower opening is the slag outlet 4.

[0034] In addition, the heating medium is oil or water, preferably oil, and the oil can be waste engine oil, which can be recycled.

[0035] In addition, a conical tube 7 is provided between the slag outlet 4 and the slag discharge pipe 3. The end of the conical tube 7 with a larger diameter is connected to the slag outlet 4, and the end of the conical tube 7 with a smaller diameter is connected to the slag discharge pipe 3, which can facilitate the protection slag to fall into the slag discharge pipe 3.

[0036] It should be particularly noted that the crystallizer 13 itself has a vibration unit.

[0037] In this embodiment, the baffle 8 is also rotatably arranged inside the slag discharge pipe 3, the vibrating rod 9 is arranged on the crystallizer 13, and the hanging rope 10 is arranged on the vibrating rod 9. Among them, the vibrating rod 9 is fixed on the crystallizer 13, and vibrates up and down following the vibration of the crystallizer 13, and the position where the hanging rope 10 is connected to the vibrating rod 9 is higher than the position of the baffle 8 in the slag discharge pipe 3. The slag discharge pipe 3 is preferably a square pipe, and as shown in the figure, the slag discharge pipe 3 is inclined, so that one end of the baffle 8 is rotatably connected to the inner wall of the left side of the slag discharge pipe 3 through a rotating shaft, and the surrounding side walls of the baffle 8 overlap with the inner wall of the slag discharge pipe 3. Therefore, when the vibrating rod 9 moves up and down following the vibration of the crystallizer 13, the baffle 8 can be moved up and down by the hanging rope 10, so that the baffle 8 is separated from the overlap with the inner wall of the slag discharge pipe 3, and a gap is formed for the protective slag to pass through and finally enter the crystallizer 13. And because the vibration frequency of the vibration unit of the crystallizer 13 is uniform and the vibration amplitude is constant, the frequency of the up and down movement of the baffle 8, that is, the time interval for the gap to appear between the baffle 8 and the slag discharge pipe 3, and the amplitude of the up and down movement of the baffle 8, that is, the size of the gap to appear between the baffle 8 and the slag discharge pipe 3, are both constant, so the amount of protective slag released from the slag discharge pipe 3 is uniform and continuous, which meets the basic requirements for adding protective slag, that is, frequent and uniform addition.

[0038] The side walls of the baffle plate 8 are all overlapped with the inner wall of the slag discharge pipe 3 , and the other end of the suspension rope 10 passes downward through the slag discharge pipe 3 and is connected to the upper part of the baffle plate 8 .

[0039] In addition, if Figure 3 As shown, the connection mode of the suspension rope 10 and the vibration rod 9 is preferably connected by a winch 11, the winch 11 is fixedly connected to the upper end of the vibration rod 9, and the suspension rope 10 is wound on the winch 11, and the length of the suspension rope 10 can be changed by the winch 11. Among them, the winch 11 is preferably a winch 11 with a self-locking function.

[0040] In addition, if Figure 4 As shown, an adjusting plate 14 is provided at the outlet of the slag discharge pipe 3, and a long through hole can be opened at the outlet of the slag discharge pipe 3, and the adjusting plate 14 is inserted into the long through hole, and the adjusting plate 14 enters the side wall inside the slag discharge pipe 3 and abuts against the inner wall of the slag discharge pipe 3, so that pulling the adjusting plate 14 can change the size of the outlet of the slag discharge pipe 3, that is, change the amount of protective slag added.

[0041] The working process of the protective slag adding device in this embodiment is as follows:

[0042] First, slide the adjustment plate 14 to adjust the size of the slag discharge pipe 3 outlet, and fill the protective slag into the filling port 12 of the slag storage space 5. The heat of the molten steel in the ladle 6 will increase the temperature of the heating medium inside the heater 2, and the heating medium circulates inside the heater 2 and the tube body 1, transferring the heat to the tube body 1, and then transferring the heat of the side wall of the tube body 1 to the protective slag in direct contact with the side wall of the tube body 1. As a result, the temperature of the protective slag in the slag storage space 5 rises, causing the moisture in the protective slag to evaporate, thereby reducing the moisture in the protective slag and reducing the adverse effects of moisture on the steel billet.

[0043] After the protective slag is filled into the slag storage space 5, the protective slag slides into the slag discharge pipe 3 along the inner wall of the conical cylinder 7. As the vibration unit of the crystallizer 13 vibrates, the vibration rod 9 vibrates up and down following the vibration of the crystallizer 13. When the vibration rod 9 vibrates upward, it drives the baffle 8 to rotate upward through the suspension rope 10, so that a gap appears between the baffle 8 and the inner wall of the slag discharge pipe 3. The protective slag passes through the gap and enters the crystallizer 13 through the outlet along the inner wall of the slag discharge pipe 3. When the vibration rod 9 vibrates downward, the baffle 8 rotates downward due to gravity, overlaps with the inner wall of the slag discharge pipe 3 again to block the gap, and the protective slag no longer falls into the crystallizer 13.

[0044] By rotating the capstan 11 to shorten the length of the lifting rope 10, the baffle 8 can be lifted, and the gap between the baffle 8 and the inner wall of the slag discharge pipe 3 becomes larger, so that the protective slag can all slide down from the outlet of the slag discharge pipe 3 and then be refilled with protective slag. After the capstan 11 is rotated to increase the length of the lifting rope 10, when the vibration rod 9 vibrates upward, the lifting rope 10 no longer lifts the baffle 8, and can completely block the protective slag, so that the protective slag will not slide into the crystallizer 13.

[0045] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A mold slag adding device, characterized in that: It comprises a plurality of mutually connected tube bodies (1), a heater (2) connected to the tube bodies (1), and a slag discharge pipe (3) with an outlet located above a crystallizer (13); A plurality of the tube bodies (1) surround a slag storage space (5) having a slag outlet (4); the plurality of the tube bodies (1) are arranged circumferentially along the slag storage space (5); the slag discharge pipe (3) is connected to the slag outlet (4); the heater (2) is arranged above the tundish (6); and a heating medium is provided inside the heater (2) and inside the tube bodies (1).

2. The mold slag adding device according to claim 1, characterized in that: The heating medium is oil or water.

3. The mold slag adding device according to claim 1 or 2, characterized in that: A conical tube (7) is provided between the slag outlet (4) and the slag discharge pipe (3); an end of the conical tube (7) with a larger diameter is connected to the slag outlet (4), and an end of the conical tube (7) with a smaller diameter is connected to the slag discharge pipe (3).

4. The mold slag adding device according to claim 1, characterized in that: It also includes a baffle (8) arranged inside the slag tapping pipe (3) for rotating, a vibrating rod (9) arranged on the crystallizer (13), and a hanging rope (10) arranged on the vibrating rod (9); The side walls of the baffle (8) are all overlapped with the inner wall of the slag discharge pipe (3), and the other end of the suspension rope (10) passes downward through the slag discharge pipe (3) and is connected to the upper part of the baffle (8).

5. The mold slag adding device according to claim 4, characterized in that: A winch (11) is provided on the vibration rod (9), and the suspension rope (10) is wound around the winch (11).

6. The mold slag adding device according to claim 4 or 5, characterized in that: The outlet of the slag tapping pipe (3) is provided with an adjusting plate (14), and the adjusting plate (14) is used to change the size of the outlet.

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