Converter movable bottom with good leakage-proof effect

Abstract

The utility model discloses a movable converter bottom with a good leakage-proof effect, the converter bottom is of a circular bottom structure, and the lap joint part of the converter bottom and a converter body is of a circular ring-shaped structure; a circle of annular leakage-proof groove is formed in the lap joint portion of the furnace bottom and the furnace body, and the leakage-proof groove is filled with fireproof asbestos ropes. And a refractory mortar layer is coated at the lap joint part of the furnace bottom and the furnace body. According to the furnace bottom, the leakage-proof groove is formed in the lap joint fixing portion of the furnace bottom and the furnace body, the fireproof asbestos cord is placed in the leakage-proof groove, the asbestos cord is extruded into a sheet shape by means of the fastening force of the furnace bottom and the furnace body in the installation process, and a leakage-proof circular ring barrier is formed by means of the plasticity of the asbestos cord. Refractory mortar is smeared on the lap joint portion of the furnace bottom and the furnace body, the width of the leakage-proof circular ring is enlarged, leveling is conducted, the sealing performance of the lap joint portion is improved, the refractory mortar is filled in a gap through extrusion during installation, redundant mortar is extruded out, the mortar is solidified into a solid state under the effect of residual heat of the converter, and it is reinforced and guaranteed that mortar leakage does not occur during joint refractory material construction.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of converter, especially a converter movable furnace bottom with good leakage prevention effect. BACKGROUND

[0002] Converter is mainly used for producing carbon steel, alloy steel and smelting of copper and nickel, and is the most common equipment for steelmaking in current long process smelting. The service life of converter lining is an important factor affecting the continuity of steelmaking process, and the erosion of converter lining is different for different smelting processes. With the improvement of China's steel smelting technology, converter bottom blowing oxygen + powder smelting method is gradually valued and used by steel enterprises. However, in the process of converter bottom blowing oxygen smelting, the service life of refractory material at the bottom of converter is difficult to be synchronized with that of the body of converter. In order to pursue longer furnace life, it is necessary to replace the refractory material at the bottom of converter in subsequent production. The joint refractory material is used to connect the replaceable bottom and the body of converter to ensure the integrity of the lining of converter. In order to improve the efficiency of converter and the service life of lining material, the bottom is usually replaced at a temperature of 300-1000℃, and the joint refractory material is constructed. The joint refractory material is stirred into a self-flowing state and pumped to the joint between the bottom and the body of converter through the bottom injection port. However, due to the long-term use of converter, the shell is deformed slightly, which may cause leakage of joint refractory material during construction. If the joint refractory material leaks, the joint may not be filled with refractory material or the filling may not be in place, which affects the use of converter and may also cause safety problems. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a converter movable furnace bottom with good leakage prevention effect to improve the sealing effect of converter.

[0004] To solve the above technical problems, the utility model adopts the technical scheme that the bottom is a circular bottom structure, and the overlapping part of the bottom and the body of converter is a circular ring structure. A circular ring-shaped leakage prevention groove is arranged at the overlapping part of the bottom and the body of converter, and the leakage prevention groove is filled with refractory asbestos rope. A layer of refractory mud layer is applied to the overlapping part of the bottom and the body of converter.

[0005] Further, the cross section of the leakage prevention groove is semicircular, with a diameter of 10-20mm and a depth of 5-10mm.

[0006] Further, the diameter of the refractory asbestos rope is 15-25mm, and the length is 1.01-1.05 times the circumference of the leakage prevention groove.

[0007] Further, the thickness of the refractory mud layer is 5-10mm.

[0008] Further, the overlapping part of the bottom and the body of converter is provided with a joint material injection hole, and the leakage prevention groove is located outside the joint material injection hole.

[0009] The beneficial effects produced by the above technical scheme are: 1. The utility model discloses a furnace bottom design leakproof groove at the lap joint fixing part of the furnace bottom and furnace body, and a refractory asbestos rope is put in, and the asbestos rope is extruded into a sheet shape by the fastening force of the furnace bottom and furnace body during installation, and a leakproof circular ring barrier is formed by using the plasticity of the asbestos rope. The design of the leakproof groove can ensure that the put-in asbestos rope will not move due to construction, and the asbestos rope will not fill the semicircular groove as a whole. This method is simple to operate and has good effects of preventing joint refractory material from leaking.

[0010] 2. The utility model discloses that a refractory mud layer is daubed at the lap joint part of the furnace bottom and furnace body, the width of the leakproof circular ring is enlarged, the sealing property of the lap joint part is leveled and enlarged, and the refractory mud is filled in the gap by extrusion during installation. The excess mud is extruded out, and the mud is solidified into a solid state under the action of the residual temperature of the converter, so that the joint refractory material construction is prevented from leaking.

[0011] 3. The utility model utilizes the plasticity of the asbestos rope and the solidification of the refractory mud to form a protective barrier to prevent the joint material from leaking during construction, so that the construction is smoothly carried out during installation. The problem that the joint refractory material leaks during construction due to the slight deformation of the furnace shell caused by long-term use of the converter, so that the joint is not filled with refractory material or is not filled in place, affecting the use of the converter, and the waste of the joint refractory material is prevented. DRAWINGS

[0012] The utility model will be further explained in detail in combination with the drawings and specific embodiments.

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] In the figure: 1, furnace bottom brick; 2, joint material injection hole; 3, leakproof groove; 4, joint; 5, lap joint part. SPECIFIC EMBODIMENT

[0015] Figure 1 As shown, the utility model discloses a converter movable furnace bottom with good leakproof effect, the furnace bottom is a circular bottom structure, the lap joint part 5 of the furnace bottom and furnace body is a circular ring structure, and the lap joint part 5 is built by using furnace bottom bricks 1. The furnace bottom is provided with a leakproof groove 3 at the lap joint part 5 with the furnace body, and the leakproof groove 3 is circular ring-shaped around the lap joint part 5. The cross section of the leakproof groove 3 is semicircular, the diameter of the semicircular shape is 10-20 mm, that is, the top groove width of the leakproof groove 3 is 10-20 mm, and the depth of the leakproof groove 3 is 5-10 mm. The lap joint part 5 of the furnace bottom and furnace body is provided with a joint material injection hole 2, and the leakproof groove 3 is located outside the joint material injection hole 2. The joint material injection hole 2 is used for injecting joint material during the installation of the furnace bottom and furnace body, and the joint material will seep into the joint 4 of the furnace bottom and furnace body to realize sealing.

[0016] Figure 1 As shown, the leak-proof converter bottom has refractory asbestos rope filled in the leak-proof groove 3; the diameter of the refractory asbestos rope is 15-25mm, and the length is 1.01-1.05 times the circumference of the leak-proof groove. A layer of refractory mortar is applied to the overlapping part 5 between the bottom and the furnace body to form a refractory mortar layer, the thickness of which is 5-10mm.

[0017] With the above structure, during installation, the asbestos rope is compressed into sheets by the fastening force between the furnace body and the furnace bottom. The plasticity of the asbestos rope forms a leak-proof circular barrier. Furthermore, the refractory mortar is filled into the gaps by compression, and excess mortar is squeezed out. The mortar solidifies into a solid state under the residual heat of the converter, further ensuring that the refractory material at the joint does not leak during construction. This achieves a better sealing effect and a more stable connection between the furnace body and the furnace bottom. Example

[0018] like Figure 1 As shown, at the overlap 5 between the furnace bottom and the furnace body, a leak-proof groove 3 with a cross-sectional diameter of 20mm and a depth of 10mm is designed. The leak-proof groove 3 is located outside the joint material injection hole 3 and inside the overlap 5 between the furnace bottom and the furnace body; no groove is designed on the furnace body. A refractory asbestos rope with a diameter of 25mm and a length 1.01 times the circumference of the leak-proof groove is partially inserted into the leak-proof groove 3. Refractory mortar is applied to the overlap 5 between the furnace bottom and the furnace body to form a refractory mortar layer with a thickness of 10mm. After the furnace bottom is installed and replaced, the overlap 5 between the furnace bottom and the furnace body is squeezed by the external force of the fastening, squeezing and filling the asbestos rope and refractory mortar. The asbestos rope will not move under the fixation of the leak-proof groove 3, and at the same time, the refractory mortar layer solidifies into a solid state under the residual heat of the converter. The asbestos rope and the refractory mortar layer form a protective barrier to prevent mortar leakage during the construction of the joint material, ensuring smooth construction.

Claims

1. A converter removable furnace bottom with good leak-proof effect, characterized in that: The furnace bottom is a circular bottom structure, and the joint part (5) between the furnace bottom and the furnace body is a circular ring structure; the furnace bottom is provided with a circular ring-shaped leakage prevention groove (3) at the joint part (5) with the furnace body, and the leakage prevention groove (3) is filled with refractory asbestos rope; and a layer of refractory mortar is applied on the joint part (5) between the furnace bottom and the furnace body.

2. The leakage-proof converter movable hearth bottom according to claim 1, characterized in that: The leakage prevention groove (3) has a semicircular cross section, a diameter of 10-20 mm and a depth of 5-10 mm.

3. The leakage-proof converter hearth according to claim 1, characterized in that: The refractory asbestos rope has a diameter of 15-25 mm and a length of 1.01-1.05 times the circumference of the leakage prevention groove.

4. The leakage-proof converter movable hearth bottom according to claim 1, characterized in that: The refractory mortar layer has a thickness of 5-10 mm.

5. A leakage-proof converter hearth according to any one of claims 1-4, characterized in that: The joint part (5) between the furnace bottom and the furnace body is provided with a joint material injection hole (2), and the leakage prevention groove (3) is located outside the joint material injection hole (2).

Images