Stopper rod baking sleeve

Abstract

The utility model provides a stopper rod baking sleeve which comprises a sleeve body and an opening and closing isolation device, the sleeve body is cylindrical, the lower portion of the sleeve body is buckled at an opening of a tundish cover, a through hole is formed in the upper portion of the sleeve body, a stopper rod can penetrate through the through hole, and when the stopper rod is not baked, the opening and closing isolation device can be buckled at the opening of the tundish cover. According to the utility model, the baking mode of heating by using gas at present can be changed, the stopper is effectively baked through heat radiation energy in the tundish without the help of external energy, and the stopper on-line replacing device is matched to be applied to continuous casting, so that the quick replacing efficiency of the stopper is favorably improved, and the production efficiency of continuous casting and continuous casting can be greatly improved.

Description

Technical Field

[0001] The utility model relates to a steelmaking continuous casting tundish device, in particular to a stopper rod baking sleeve structure. Background Art

[0002] In the continuous casting production process, the stopper rod is used in conjunction with the water inlet in the tundish to control the flow of molten steel and open and close the tundish. When the tundish is put into use, in order to reduce the problem of the stopper rod heating up rapidly and breaking due to the injection of high-temperature molten steel, the stopper rod needs to be baked and preheated. On site, the stopper rod is generally installed in the tundish and then baked together with the tundish. With the promotion of the stopper rod online replacement device, the stopper rod needs to be replaced while the tundish is in operation, so the new stopper rod used to replace the old stopper rod cannot be baked together with the tundish. In order to solve the baking problem, the existing practice is to place a baking furnace near the tundish or on the top cover, and introduce gas ignition to bake and preheat the stopper rod.

[0003] The existing method of baking the plug rod by introducing coal gas not only occupies limited working space on site, but also increases equipment investment and energy costs, is complex to operate, and has potential safety hazards. During the continuous casting production process, the tundish cover is affected by the heat radiation of the molten steel, and generally can be heated to 1000-1200℃, and has a certain balanced heat preservation performance, which can be used as heat energy. Utility Model Content

[0004] The utility model provides a stopper rod baking sleeve structure, which solves the problem that the stopper rod cannot be effectively baked when the stopper rod is quickly replaced at the continuous casting site. It can change the preheating baking method commonly used in the baking box at the continuous casting site, avoid the problems of occupation of working space, increase in equipment and energy investment costs, and waste of heat radiation energy of the cover. The technical solution is as follows:

[0005] A stopper rod baking sleeve comprises a sleeve body and an opening and closing isolation device. The sleeve body is cylindrical and buckled at the opening of a middle bag cover at the bottom. A through hole is provided at the top for the stopper rod to pass through. When the stopper rod is not baked, the opening and closing isolation device can be used to buckle at the opening of the middle bag cover.

[0006] The sleeve body comprises, from outside to inside, an outer structural steel shell, a middle insulation layer, and an inner refractory material layer, and the sleeve body is provided with a through hole which passes through from top to bottom.

[0007] The opening and closing isolation device comprises a handle, a cover plate and a blocking block which are sequentially connected up and down.

[0008] The opening provided in the tundish cover is wide at the top and narrow at the bottom, the upper end of the opening corresponds to the outer diameter of the sleeve body and the outer diameter of the opening and closing isolation device, and the shape of the cover plate of the opening and closing isolation device matches the shape of the upper end of the opening; the lower end of the opening passes through the cover castable of the tundish cover, the lower end of the opening is conical, and the blocking block of the opening and closing isolation device matches the shape of the lower end of the opening.

[0009] The through hole of the sleeve body has the same or different sizes at the top and bottom, the opening at the top is the first opening, the opening at the bottom is the second opening, and the centers of the first opening and the second opening are located on the same vertical line.

[0010] The size of the lower end of the opening of the middle bag cover is greater than 10 cm.

[0011] The structural steel shell is made of heat-resistant steel plate.

[0012] The thermal insulation layer is made of aluminum silicate refractory fiber felt.

[0013] The refractory material layer is made of mullite lightweight castable.

[0014] The stopper rod baking sleeve structure has the following advantages:

[0015] 1. It can change the current baking method of introducing gas heating. Without the help of external energy, the stopper rod can be effectively baked through the heat radiation energy in the tundish, reducing the problem of energy waste.

[0016] 2. The application of stopper rod online replacement device in continuous casting can help improve the efficiency of stopper rod quick replacement and greatly improve the production efficiency of continuous casting and pouring.

[0017] 3. It can solve the common problems of baking ovens occupying limited working space and site in continuous casting sites, which is conducive to reducing equipment investment and maintenance costs, as well as gas energy consumption costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a structural schematic diagram of the stopper rod baking sleeve structure embodiment 1;

[0019] Figure 2 is a structural schematic diagram of the second embodiment of the stopper rod baking sleeve structure;

[0020] Figure 3 It is a schematic diagram of the structure of the opening and closing isolation device in the second embodiment. DETAILED DESCRIPTION

[0021] like Figure 1In the first embodiment shown, the stopper rod baking sleeve structure includes a sleeve body 20 and an opening and closing isolation device 22. The sleeve body 20 is cylindrical and has through holes at the top and bottom. The bottom is buckled at the opening of the tundish cover. The through hole 21 at the top is used to pass the stopper rod 23. When the new stopper rod is not baked, the opening and closing isolation device 22 can be buckled at the opening of the tundish cover. Further, the opening and closing isolation device 22 is in the shape of a cover.

[0022] like Figure 2 In the second embodiment shown, the stopper rod baking sleeve structure includes a sleeve body 20 and an opening and closing isolation device 22. The opening of the tundish cover is used to place the sleeve body 20 or the opening and closing isolation device 22. The sleeve body includes an outer structural steel shell 3, a middle insulation layer 4, and an inner refractory material layer 5 from the outside to the inside. The sleeve body is provided with a through hole that passes through from top to bottom; Figure 3 As shown, the opening and closing isolation device includes a handle 8, a cover plate 7 and a blocking block 9 which are sequentially connected up and down.

[0023] The tundish cover comprises a steel structure 1 and a cover castable 2 therebelow. A hole is opened at a selected position on the cover for placing a sleeve body or an opening and closing isolation device. The hole is wide at the top and narrow at the bottom. The upper end of the hole corresponds to the outer diameter of the sleeve body and the outer diameter of the opening and closing isolation device, and the shape of a cover plate 7 of the opening and closing isolation device matches that of the upper end of the hole. The lower end of the hole passes through the cover castable 2 of the tundish cover, the lower end of the hole is conical, and the shape of a blocking block 9 of the opening and closing isolation device matches that of the lower end of the hole.

[0024] The through hole of the sleeve body has the same or different sizes at the top and bottom, the opening at the upper end is the first opening, the opening at the lower end is the second opening, the centers of the first opening and the second opening are located on the same vertical line, and when the sleeve body is placed on the opening of the middle bag cover, the size of the lower end of the opening is smaller than the size of the second opening, but the size of the lower end of the opening still needs to be greater than 10 cm.

[0025] When the sleeve body is manufactured, the structural steel shell 3 is made of heat-resistant steel plate, the insulation layer 4 is made of aluminum silicate refractory fiber felt, and the refractory material layer 5 is made of mullite lightweight castable. Furthermore, when not baked, a cover head 6 can be placed on the sleeve body. At this time, an opening and closing isolation device is used to cover the opening of the tundish cover.

[0026] When baking is required, remove the opening and closing isolation device on the opening of the middle ladle cover, place the sleeve body at the opening, and use the stopper rod quick-change device to pass the stopper rod through the first opening on the upper part of the sleeve body and place it inside the sleeve body. Inside the sleeve body, the heat source is transferred to the sleeve body through the opening of the middle ladle cover, so that the stopper rod is effectively baked.

[0027] After baking is completed, the stopper rod is transferred to the tundish for use through the stopper rod quick-change device, the sleeve body is removed, and the opening and closing isolation device is pushed over the opening to cover and keep warm.

[0028] The sleeve body and the opening and closing isolation device share a cover opening. When the sleeve body is installed, the opening and closing isolation device is removed. When the sleeve body is not installed, the opening and closing isolation device is placed here.

[0029] The utility model has the following advantages:

[0030] 1. The utility model can change the current baking method using gas heating. Without the help of external energy, the stopper rod can be effectively baked through the heat radiation energy in the tundish, thus reducing the problem of energy waste.

[0031] 2. The application of stopper rod online replacement device in continuous casting can help improve the efficiency of stopper rod quick replacement and greatly improve the production efficiency of continuous casting and pouring.

[0032] 3. It can solve the common problems of baking ovens occupying limited working space and site in continuous casting sites, which is conducive to reducing equipment investment and maintenance costs, as well as gas energy consumption costs.

Claims

1. A stopper rod baking sleeve, characterized in that: It includes a sleeve body and an opening and closing isolation device. The sleeve body is cylindrical and buckled at the opening of the middle bag cover at the bottom. A through hole is provided at the top for passing the stopper rod. When the stopper rod is not baked, the opening and closing isolation device can be buckled at the opening of the middle bag cover.

2. The stopper rod baking sleeve according to claim 1, characterized in that: The sleeve body comprises, from outside to inside, an outer structural steel shell, a middle insulation layer, and an inner refractory material layer, and the sleeve body is provided with a through hole which passes through from top to bottom.

3. The stopper rod baking sleeve according to claim 1, characterized in that: The opening and closing isolation device comprises a handle, a cover plate and a blocking block which are sequentially connected up and down.

4. The stopper rod baking sleeve according to claim 1, characterized in that: The opening provided in the tundish cover is wide at the top and narrow at the bottom, the upper end of the opening corresponds to the outer diameter of the sleeve body and the outer diameter of the opening and closing isolation device, and the shape of the cover plate of the opening and closing isolation device matches the shape of the upper end of the opening; the lower end of the opening passes through the cover castable of the tundish cover, the lower end of the opening is conical, and the blocking block of the opening and closing isolation device matches the shape of the lower end of the opening.

5. The stopper rod baking sleeve according to claim 1, characterized in that: The through hole of the sleeve body has the same or different sizes at the top and bottom, the opening at the top is the first opening, the opening at the bottom is the second opening, and the centers of the first opening and the second opening are located on the same vertical line.

6. The stopper rod baking sleeve according to claim 1, characterized in that: The size of the lower end of the opening of the middle bag cover is greater than 10 cm.

7. The stopper rod baking sleeve according to claim 2, characterized in that: The structural steel shell is made of heat-resistant steel plate.

8. The stopper rod baking sleeve according to claim 2, characterized in that: The thermal insulation layer is made of aluminum silicate refractory fiber felt.

9. The stopper rod baking sleeve according to claim 2, characterized in that: The refractory material layer is made of mullite lightweight castable.

Images