Efficient treatment RH dip pipe

Abstract

The utility model relates to an efficient treatment RH dip pipe, which comprises a dip pipe brick ring, an inner layer castable, a steel liner and an outer layer castable, the dip pipe brick ring comprises long refractory bricks and short refractory bricks which are arranged in a staggered manner, an inner cavity of the RH dip pipe is a long circular hole formed by two straight edges and two semicircles, a brick supporting plate is arranged at the bottom of each short refractory brick, and the outer layer castable is arranged at the bottom of each long refractory brick. The brick supporting plate is fixedly connected with the inner wall of the steel container, a reinforcing plate is connected between the brick supporting plate and the steel container, and a reinforcing ring is arranged on the periphery of a bottom necking of the steel container. The inner cavity of the dip pipe is in a long circle shape, compared with a traditional oval dip pipe, the cross sectional area of passing steel is larger, the treatment efficiency of an RH vacuum refining furnace is higher, the circulation rate of molten steel in the RH vacuum refining process is larger, the refining time can be shortened, and the energy consumption of a steel mill is reduced. And the reinforcing ring can prevent or reduce the deformation of the RH dip pipe steel liner. And the brick supporting plate is used for fixing the dip pipe brick, so that the condition that the brick falls off due to structural deformation of the RH dip pipe is prevented.

Description

Technical Field

[0001] The utility model relates to steel refining equipment, in particular to an RH impregnation tube for high-efficiency treatment. Background Art

[0002] With the increasing demand for ultra-low carbon steel, RH vacuum refining furnace is the main means of ultra-low carbon steel production. Improving the processing efficiency of RH vacuum refining has a decisive impact on the production of ultra-low carbon steel. The large steel cross-section of the RH immersion tube limits the processing efficiency of the RH vacuum refining furnace. Due to the limitations of the RH vacuum chamber tank bottom interface flange and the butt pipe wall, the cross-sectional area of ​​the steel cannot be increased by increasing the outer diameter of the RH immersion tube. Therefore, the processing efficiency of RH vacuum refining is limited. During the refining process of the RH vacuum refining furnace, the bottom castable of the RH immersion tube and the bottom immersion tube bricks are the areas most severely eroded and washed by molten steel. The RH immersion tube bottom castable and the RH immersion tube brick ring are prone to fall off.

[0003] The existing patent CN102560010A is a dipping tube for RH refining furnace, which includes a steel bladder and castables arranged inside and outside the steel bladder. Two layers of refractory bricks are arranged on the castables of the inner wall of the steel bladder. The dipping tube also includes an argon gas pipe leading from the outer side of the steel bladder to the inner cavity of the dipping tube; the two layers of magnesia-chrome bricks are respectively the first layer of refractory bricks on the upper part and the second layer of refractory bricks on the lower part. The first layer of refractory bricks and the second layer of refractory bricks are combined in a cross-shaped manner on the inner wall of the dipping tube, so that the upper and lower rings of bricks bite each other to form a whole. The bottom of the steel bladder of the dipping tube is easily deformed during use, and the castable and the second layer of refractory bricks at the bottom of the dipping tube are at risk of falling off. Summary of the invention

[0004] The technical problem to be solved by the utility model is to provide an RH impregnation tube with high efficiency, so as to solve the problem that the steel cross section of the RH impregnation tube actively limits the processing efficiency of the RH vacuum refining furnace.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The invention discloses an RH impregnation tube for high-efficiency treatment, comprising an impregnation tube brick ring, an inner layer castable, a steel bladder, and an outer layer castable. The impregnation tube brick ring comprises long refractory bricks and short refractory bricks arranged in a staggered manner. The inner cavity of the RH impregnation tube is an oblong hole composed of two straight edges and two semicircles. A brick support plate is provided at the bottom of the short refractory brick. The brick support plate is fixedly connected to the inner wall of the steel bladder. A reinforcement plate is connected between the brick support plate and the steel bladder. A reinforcement ring is provided at the outer periphery of the shrinkage at the bottom of the steel bladder.

[0007] The ratio of the straight side length of the oblong hole to the radius of the semicircle is 0.8-0.9.

[0008] The length of the brick supporting plate is less than one quarter of the radial wall thickness of the short refractory brick, and the width of the brick supporting plate is less than two thirds of the circumferential wall thickness of the short refractory brick.

[0009] One side of the reinforcing plate is connected to the bottom surface of the supporting brick, and the other side is connected to the inner wall of the steel liner.

[0010] The reinforcement ring is made of round steel with a diameter of 20-28 mm.

[0011] An air guide tube is arranged in the inner layer casting material.

[0012] The air blowing pipes are arranged in a staggered manner in the impregnated pipe brick ring.

[0013] The top of the steel bladder is connected with a lifting lug.

[0014] Compared with the existing technology, the beneficial effects of the utility model are:

[0015] The inner cavity of the immersion pipe of the utility model is oblong. Compared with the traditional elliptical immersion pipe, the cross-sectional area of ​​the steel passing through is larger, the processing efficiency of the RH vacuum refining furnace is higher, the circulation rate of the molten steel is larger during the RH vacuum refining process, the refining time can be shortened, and the energy consumption of the steel plant is reduced.

[0016] The inner castable plays the role of fixing the impregnated pipe brick ring and heat preservation. The reinforcement ring can prevent or reduce the deformation of the RH impregnated pipe steel liner. The brick support plate fixes the impregnated pipe bricks to prevent the bricks from falling off due to the deformation of the RH impregnated pipe structure.

[0017] The blowing pipes are arranged in a staggered manner, and the lifting gas introduced through the blowing pipes is not easy to accumulate, making the lifting gas distribution more uniform and enhancing the molten steel circulation lifting capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a cross-sectional view of the utility model.

[0020] In the figure: impregnated pipe brick ring 1, inner layer castable 2, steel bladder 3, outer layer castable 4, long refractory bricks 5, short refractory bricks 6, brick support plate 7, reinforcement plate 8, reinforcement ring 9, air guide pipe 10, air blowing pipe 11, lifting ear 12, anchor 13, steel mesh 14. Implementation

[0021] In the description of the present invention, it should be understood that the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means more than two.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it 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, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0023] like Figure 1-Figure 2 A high-efficiency RH immersion tube comprises an immersion tube brick ring 1, an inner layer castable 2, a steel bladder 3, and an outer layer castable 4. The immersion tube brick ring 1 comprises long refractory bricks 5 and short refractory bricks 6 arranged in a staggered manner. The inner cavity of the RH immersion tube is an oblong hole composed of two straight edges and two semicircles. A brick support plate 7 is provided at the bottom of the short refractory brick 6. The brick support plate 7 is fixedly connected to the inner wall of the steel bladder 3. A reinforcement plate 8 is connected between the brick support plate 7 and the steel bladder. A reinforcement ring 9 is provided at the outer periphery of the shrinkage at the bottom of the steel bladder 3.

[0024] The ratio of the straight side length of the oblong hole to the radius of the semicircle is 0.8-0.9.

[0025] The length of the brick supporting plate 7 is less than one quarter of the radial wall thickness of the short refractory brick 6, and the width of the brick supporting plate 7 is less than two thirds of the circumferential wall thickness of the short refractory brick.

[0026] One side of the reinforcing plate 8 is connected to the bottom surface of the supporting brick 7 , and the other side is connected to the inner wall of the steel liner 3 .

[0027] The reinforcement ring 9 is made of round steel with a diameter of 20-28 mm.

[0028] An air guide tube 10 is provided in the inner layer casting material 2 .

[0029] The air blowing pipes 11 are arranged in a staggered manner in the impregnated pipe brick ring 1 .

[0030] The top of the steel bladder 3 is connected to a lifting lug 12 .

[0031] The outer layer casting material 4 is provided with a plurality of anchors 13 connected to the outer wall of the steel bladder 3 , and the anchors 13 are connected with steel meshes 14 .

[0032] In order to make the purpose, technical scheme and technical effect of the utility model clearer, the technical scheme in the embodiment of the utility model is now described clearly and completely. However, the embodiment described below is only a part of the embodiment of the utility model, not all of the embodiments. In combination with the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0033] A high-efficiency RH immersion pipe comprises an immersion pipe brick ring 1, an inner layer castable 2, a steel bladder 3, and an outer layer castable 4. The immersion pipe brick ring 1 comprises long refractory bricks 5 and short refractory bricks 6 arranged in a staggered manner. The inner cavity of the RH immersion pipe is an oblong hole composed of two straight sides and two semicircles. The ratio of the straight side length of the oblong hole to the radius of the semicircle is 0.82. A supporting brick plate 7 is provided at the bottom of the short refractory brick 6. The supporting brick plate 7 is fixedly connected to the inner wall of the steel bladder 3. A reinforcing plate 8 is connected between the supporting brick plate 7 and the steel bladder. One side of the reinforcing plate 8 is connected to the bottom surface of the supporting plate brick 7, and the other side is connected to the inner wall of the steel bladder 3. A reinforcing ring 9 is provided at the outer periphery of the shrinkage at the bottom of the steel bladder 3. The reinforcing ring 9 is a round steel with a diameter of 20 mm. An air guide pipe 10 is provided in the inner layer castable 2. Blowing pipes 11 are arranged in a staggered manner in the immersion pipe brick ring 1. The top of the steel bladder 3 is connected to a lifting ear 12. Example

[0034] An RH immersion pipe for high-efficiency treatment includes an immersion pipe brick ring 1, an inner layer castable 2, a steel liner 3, and an outer layer castable 4. The immersion pipe brick ring 1 includes long refractory bricks 5 and short refractory bricks 6 arranged in a staggered manner. The inner cavity of the RH immersion pipe is an oblong hole composed of two straight sides and two semicircles. The ratio of the length of the straight side of the oblong hole to the radius of the semicircle is 0.88. A brick support plate 7 is provided at the bottom of the short refractory brick 6. The length of the brick support plate 7 is less than one-fourth of the radial wall thickness of the short refractory brick 6, and the width of the brick support plate 7 is less than two-thirds of the circumferential wall thickness of the short refractory brick.

[0035] The brick support plate 7 is fixedly connected to the inner wall of the steel bladder 3, and a reinforcement plate 8 is connected between the brick support plate 7 and the steel bladder. One side of the reinforcement plate 8 is connected to the bottom surface of the support plate brick 7, and the other side is connected to the inner wall of the steel bladder 3. A reinforcement ring 9 is provided at the outer periphery of the bottom shrinkage of the steel bladder 3. The reinforcement ring 9 is a round steel with a diameter of 22 mm. An air guide tube 10 is provided in the inner layer castable 2. Blowing pipes 11 are staggered in the impregnated tube brick ring 1. The top of the steel bladder 3 is connected to a lifting ear 12. An air guide tube 10 is provided in the inner layer castable 2. Blowing pipes 11 are staggered in the impregnated tube brick ring 1. A plurality of anchors 13 connected to the outer wall of the steel bladder 3 are provided in the outer layer castable 4, and a steel mesh 14 is connected between the anchors 13.

[0036] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and basic spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An RH immersion pipe for high efficiency treatment, comprising an immersion pipe brick ring, an inner layer castable, a steel liner, and an outer layer castable, wherein the immersion pipe brick ring comprises staggered long refractory bricks and short refractory bricks, characterized in that: The inner cavity of the RH immersion tube is an oblong hole composed of two straight edges and two semicircles. A brick support plate is provided at the bottom of the short refractory brick. The brick support plate is fixedly connected to the inner wall of the steel bladder. A reinforcement plate is connected between the brick support plate and the steel bladder. A reinforcement ring is provided on the outer periphery of the shrinkage at the bottom of the steel bladder.

2. The RH impregnated tube for high efficiency treatment according to claim 1, characterized in that: The ratio of the straight side length of the oblong hole to the radius of the semicircle is 0.8-0.

9.

3. The RH impregnated tube for high efficiency treatment according to claim 1, characterized in that: The length of the brick supporting plate is less than one quarter of the radial wall thickness of the short refractory brick, and the width of the brick supporting plate is less than two thirds of the circumferential wall thickness of the short refractory brick.

4. The RH impregnated tube for high efficiency treatment according to claim 1, characterized in that: One side of the reinforcing plate is connected to the bottom surface of the supporting brick, and the other side is connected to the inner wall of the steel liner.

5. The RH impregnated tube for high efficiency treatment according to claim 1, characterized in that: The reinforcement ring is made of round steel with a diameter of 20-28 mm.

6. The RH impregnated tube for high efficiency treatment according to claim 1, characterized in that: An air guide tube is arranged in the inner layer casting material.

7. The RH impregnated tube for high efficiency treatment according to claim 1, characterized in that: The air blowing pipes are arranged in a staggered manner in the impregnated pipe brick ring.

8. The RH impregnated tube for high efficiency treatment according to claim 1, characterized in that: The top of the steel bladder is connected with a lifting lug.

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