Slag baffle device on lower side of steelmaking converter

Abstract

The utility model relates to a slag baffle device on the lower side of a steelmaking converter, which comprises a baffle device on the lower side of the converter, the baffle device on the lower side of the converter is arranged on two sides in a retaining wall on the lower side of the converter, the baffle device on the lower side of the converter is composed of a cast iron plate and a support frame, and the support frame is welded on an embedded steel plate of the retaining wall on the lower side of the converter. According to the equipment provided by the embodiment of the invention, the baffle device on the lower side of the converter is mainly used for collecting steel slag, flue false covers and other waste residues falling from a converter body and a vaporization flue into a pit below the converter, a forklift truck can conveniently clean accumulated slag below the converter, meanwhile, a large amount of waste residues are prevented from falling onto a rail below the converter, and major potential safety hazards are avoided; h-shaped steel is adopted in the vertical direction of the frame, I-shaped steel or H-shaped steel is adopted in the transverse direction of the frame, after the frame is adjusted, it is guaranteed that cast iron plates are installed in parallel and level, slag accumulation is avoided, fire clay is fully coated in cast iron plate screw counter bores and gaps of the cast iron plates, full welding is conducted between supports and the frame and between the supports and embedded steel plates, and the height of welding seams is larger than 10 mm so that the strength of the slag baffle can be guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of steel-making converters, and in particular to a slag retaining plate device at the lower side of a steel-making converter. Background Art

[0002] At present, steelmaking technology is developing rapidly. In order to improve equipment safety, increase the safety factor of operators, and reduce the maintenance cost of equipment, the corresponding key equipment is innovated and transformed to meet production needs. The main function of the baffle device on the lower side of the converter furnace is to collect the steel slag, flue false cover and other waste slag falling from the converter furnace body and the vaporization flue to the pit under the converter furnace, so as to facilitate the forklift to clean the accumulated slag under the furnace. At the same time, it prevents a large amount of waste slag from falling onto the track under the furnace to avoid major safety hazards. Since the waste slag produced by converter smelting has a high iron content and a high specific gravity, it is easy to damage the lower side baffle of the furnace when it hits the lower side slag plate from the furnace body with a drop of seven or eight meters. Therefore, we proposed a slag baffle device on the lower side of the steelmaking converter furnace. Utility Model Content

[0003] The present application provides a slag retaining plate device at the lower side of a steelmaking converter furnace to solve the problems raised in the above-mentioned background technology.

[0004] In order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a slag retaining plate device at the lower side of a steelmaking converter furnace, comprising:

[0005] The lower side baffle device of the furnace is arranged on both sides of the lower retaining wall of the converter furnace. The lower side baffle device of the furnace is composed of a cast iron plate and a support frame. The support frame is welded to the embedded steel plate of the lower retaining wall of the converter furnace, and the cast iron plate is fixedly connected to the opposite surface of the support frame.

[0006] Optionally, the support frame includes an H-shaped steel, a first I-shaped steel, a second I-shaped steel, a channel steel and a rib plate. A plurality of H-shaped steels are provided. The first I-shaped steel and the second I-shaped steel are welded to the upper and lower sides of the end surface of the H-shaped steel close to the lower retaining wall of the converter furnace, respectively, and a channel steel is welded between the first I-shaped steel and the second I-shaped steel.

[0007] Optionally, the first I-beam and the second I-beam are welded to the embedded steel plate, and the embedded steel plate is embedded in the lower retaining wall of the converter.

[0008] Optionally, a plurality of ribs are welded to the outer sides of the welding point between the first I-beam and the H-beam.

[0009] Optionally, a cast iron plate is fixedly laid on the end surface of the H-shaped steel away from the lower retaining wall of the converter furnace.

[0010] Optionally, the cast iron plate is symmetrically inclined, and the angle between the cast iron plate and the horizontal direction is greater than 40° and less than 45°.

[0011] Optionally, a slag pit is provided at the inner lower end of the lower retaining wall of the converter.

[0012] Optionally, molten steel car tracks are provided on the upper parts of both sides of the slag accumulation pit under the furnace, and a ladle is provided on the molten steel car tracks.

[0013] The above technical solution provided by the embodiment of the present application has the following advantages compared with the prior art:

[0014] The main function of the baffle device on the lower side of the converter provided in the embodiment of the present application is to collect the waste slag such as steel slag and flue cover falling from the converter body and the vaporization flue into the pit under the converter, so as to facilitate the forklift to clean the accumulated slag under the furnace, and at the same time, to prevent a large amount of waste slag from falling onto the track under the furnace, thereby avoiding major safety hazards;

[0015] The frame adopts H-shaped steel vertically and I-shaped steel or H-shaped steel horizontally. After the frame is adjusted, the cast iron plate is installed flush to avoid slag accumulation. After the cast iron plate of the slag retaining plate device is installed, the countersunk holes of the cast iron plate screws and the gaps between the cast iron plates are coated with refractory mud. The support and the frame as well as the support and the embedded steel plate are fully welded, and the weld height is greater than 10mm to ensure the strength of the slag retaining plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 This is an overall structural diagram of a slag retaining plate device at the lower side of a steelmaking converter furnace;

[0019] Figure 2 The present invention is a structural diagram of a furnace lower side baffle device of a steelmaking converter furnace lower side slag baffle device.

[0020] In the figure: 1. embedded steel plate; 2. retaining wall under converter; 3. molten steel car track; 4. slag pit under furnace; 5. ladle; 6. side baffle device under furnace; 7. support frame; 71. H-beam; 72. first I-beam; 73. second I-beam; 74. channel steel; 75. rib plate; 8. cast iron plate. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0022] Various embodiments of the present application may exist in the form of a range. It should be understood that the description in the form of a range is only for convenience and simplicity and should not be understood as a hard limit to the scope of the present application; therefore, it should be considered that the range description has specifically disclosed all possible sub-ranges and single values ​​within the range. For example, it should be considered that the range description from 1 to 6 has specifically disclosed sub-ranges, such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., as well as single numbers within the range, such as 1, 2, 3, 4, 5 and 6, which are applicable regardless of the range. In addition, whenever a numerical range is indicated in the present application, it is meant to include any quoted numbers (fractions or integers) within the indicated range. Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present application, etc., can be purchased from the market or can be prepared by existing methods.

[0023] In the present application, in the absence of any contrary description, the directional words used, such as "upper" and "lower", are specifically the directions of the drawings in the accompanying drawings. In addition, in the present application, the terms "include", "comprise", etc. refer to "including but not limited to". In the present application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the present application, "and / or" describes the association relationship of the associated objects, indicating that three relationships may exist, for example, A and / or B, which can represent: A exists alone, A and B exist at the same time, and B exists alone. Wherein A, B can be singular or plural. In the present application, "at least one" refers to one or more, and "plural" refers to two or more. "At least one", "at least one of the following" or similar expressions refer to any combination of these items, including any combination of singular items or plural items. For example, "at least one of a, b, or c" or "at least one of a, b and c" can both mean: a, b, c, ab, i.e. a and b, ac, bc or abc, where a, b, c can be single or plural, respectively.

[0024] like Figure 1-Figure 2As shown, the embodiment of the present application provides a slag retaining plate device at the lower side of a steelmaking converter furnace, comprising:

[0025] The lower side baffle device 6 is arranged on both sides of the lower retaining wall 2 of the converter furnace. The lower side baffle device 6 is composed of a cast iron plate 8 and a support frame 7. The support frame 7 is welded to the embedded steel plate 1 of the lower retaining wall 2 of the converter furnace, and the cast iron plate 8 is fixedly connected to the opposite surface of the support frame 7.

[0026] like Figure 2 As shown: the support frame 7 includes an H-beam 71, a first I-beam 72, a second I-beam 73, a channel steel 74 and a rib plate 75. The H-beam 71 is provided with a plurality of them. The first I-beam 72 and the second I-beam 73 are welded to the upper and lower sides of the end surface of the H-beam 71 close to the lower retaining wall 2 of the converter furnace, respectively, and a channel steel 74 is welded between the first I-beam 72 and the second I-beam 73.

[0027] Specifically, the support frame 7 is provided to support the cast iron plate 8 .

[0028] like Figure 2 As shown: the first I-beam 72 and the second I-beam 73 are welded to the embedded steel plate 1, and the embedded steel plate 1 is embedded in the lower retaining wall 2 of the converter.

[0029] Specifically, the embedded steel plate 1 is embedded in the lower retaining wall 2 of the converter furnace in order to connect the corresponding first I-beam 72 and the second I-beam 73 .

[0030] like Figure 2 As shown, a plurality of ribs 75 are welded on the outer side of the welding point between the first I-beam 72 and the H-beam 71 .

[0031] Specifically, the rib plate 75 can greatly increase the welding strength between the first I-beam 72 and the H-beam 71 .

[0032] like Figure 1 As shown: a cast iron plate 8 is fixedly laid on the end surface of the H-shaped steel 71 away from the lower retaining wall 2 of the converter furnace.

[0033] Specifically: the length and width of each cast iron plate 8 are less than 1 meter, and the thickness is greater than 50mm to ensure the strength of a single plate.

[0034] like Figure 1 As shown: the cast iron plate 8 is symmetrically inclined, and the angle between the cast iron plate 8 and the horizontal direction is greater than 40° and less than 45°.

[0035] like Figure 1 As shown: the lower inner end of the lower retaining wall 2 of the converter is provided with a slag accumulation pit 4.

[0036] The upper parts of both sides of the slag accumulation pit 4 under the furnace are provided with molten steel car tracks 3 , and the molten steel car tracks 3 are provided with a ladle 5 .

[0037] Specifically, the slag pit 4 under the furnace, the molten steel car track 3 and the ladle 5 are all existing equipment.

[0038] When the equipment is in use, the side baffle devices 6 on both sides of the converter furnace need to be designed to keep a suitable distance from the ladle 5 when the molten steel car is carrying the ladle 5, and at the same time, the waste slag must be collected in the slag accumulation pit 4 under the furnace to prevent the waste slag from falling on the molten steel car track 3 to form a safety hazard. The baffles of the baffle device 6 under the converter furnace are made of cast iron, and the length and width of each cast iron plate 8 are less than 1 meter, and the thickness is greater than 50mm to ensure the strength of a single plate. When the baffle devices 6 on both sides of the furnace need to be built under the converter, a steel plate 1 is embedded in the retaining wall of the converter furnace on both sides of the converter furnace for welding support. The thickness of the embedded steel plate 1 is greater than 12m m; the support of the baffle device 6 on the lower side of the furnace is made of H-shaped steel 71, and the height and flange width are not less than 200mm; the angle between the oblique support of the baffle device 6 on the lower side of the furnace and the horizontal direction is required to be greater than 40° and less than 45°; the frame adopts H-shaped steel 71 vertically, and I-shaped steel or H-shaped steel horizontally, and the frame is adjusted to ensure that the cast iron plate 8 is installed flush to avoid slag accumulation. After the cast iron plate 8 of the baffle device 6 on the lower side of the furnace is installed, the screw countersunk holes of the cast iron plate 8 and the gaps between the cast iron plates are fully coated with refractory mud, and the support and the frame as well as the support and the embedded steel plate are fully welded, and the weld height is greater than 10㎜ to ensure the strength of the baffle device 6 on the lower side of the furnace.

[0039] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. It will be apparent to those skilled in the art that various modifications to these embodiments are possible, and the general principles defined in the present application can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown in the present application, but will conform to the widest scope consistent with the principles and novel features applied for by the present application.

Claims

1. A slag retaining plate device at the lower side of a steelmaking converter furnace, characterized in that: include: A furnace lower side baffle device (6), the furnace lower side baffle device (6) is arranged on both sides of the lower retaining wall (2) of the converter furnace, the furnace lower side baffle device (6) is composed of a cast iron plate (8) and a support frame (7), the support frame (7) is welded to the embedded steel plate (1) of the lower retaining wall (2) of the converter furnace, and the cast iron plate (8) is fixedly connected to the opposite surface of the support frame (7).

2. The slag retaining plate device at the lower side of the steelmaking converter according to claim 1, characterized in that: The support frame (7) comprises an H-shaped steel (71), a first I-shaped steel (72), a second I-shaped steel (73), a channel steel (74) and a rib plate (75), wherein a plurality of H-shaped steels (71) are provided, and the first I-shaped steel (72) and the second I-shaped steel (73) are respectively welded on the upper and lower sides of the end surface of the H-shaped steel (71) close to the lower retaining wall (2) of the converter furnace, and the channel steel (74) is welded between the first I-shaped steel (72) and the second I-shaped steel (73).

3. The slag retaining plate device at the lower side of the steelmaking converter according to claim 2, characterized in that: The first I-beam (72) and the second I-beam (73) are welded to the embedded steel plate (1), and the embedded steel plate (1) is embedded in the lower retaining wall (2) of the converter.

4. The slag retaining plate device at the lower side of the steelmaking converter according to claim 2, characterized in that: A plurality of rib plates (75) are welded to the outside of the welding point between the first I-beam (72) and the H-beam (71).

5. The slag retaining plate device at the lower side of the steelmaking converter according to claim 4, characterized in that: A cast iron plate (8) is fixedly laid on the end surface of the H-shaped steel (71) away from the lower retaining wall (2) of the converter furnace.

6. The slag retaining plate device at the lower side of the steelmaking converter according to claim 1, characterized in that: The cast iron plate (8) is symmetrically inclined, and the angle between the cast iron plate (8) and the horizontal direction is greater than 40° and less than 45°.

7. The slag retaining plate device at the lower side of the steelmaking converter according to claim 1, characterized in that: The lower inner end of the lower retaining wall (2) of the converter is provided with an under-furnace slag accumulation pit (4).

8. The slag retaining plate device at the lower side of the steelmaking converter according to claim 7, characterized in that: The upper parts of both sides of the slag accumulation pit (4) under the furnace are provided with molten steel wheel tracks (3), and a ladle (5) is provided on the molten steel wheel tracks (3).

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