Fixed structure of blast furnace bottom sealing plate

Abstract

The present invention discloses a fixing structure for a blast furnace bottom plate, comprising: a blast furnace foundation, on which an I-beam is mounted, with a boss formed upwardly on the circumferential edge of the blast furnace foundation; and a bottom plate mounted on the I-beam. The top of the boss is provided with an embedded component, to which the edge of the bottom plate is connected. The present invention solves the problem in prior art that the fixing structure for the bottom plate cannot effectively prevent the bottom plate from warping.

Description

Technical Field

[0001] The present invention relates to the technical field of blast furnace structures, in particular to a fixing structure of a blast furnace bottom sealing plate. Background Art

[0002] The blast furnace hearth is a crucial component of the blast furnace, and its sealing performance is crucial to the furnace's lifespan, economic benefits, and safe production. Above the hearth seal, refractory materials are built. If the hearth seal deforms, the refractory materials will shift, exacerbating erosion by molten iron and even causing the carbon bricks at the hearth to float and melt through the blast furnace.

[0003] In recent years, due to the sluggish steel market, blast furnaces have been used to control ironmaking costs by using lower-grade ore with excessively high levels of harmful economic mineral elements, particularly alkali metals, lead, and zinc. These harmful metals accumulate in the furnace, corroding the lining and causing abnormal expansion, which can lead to warping of the blast furnace's bottom plate. This warping can easily cause the plate to crack, leading to gas leaks and damaging the overall structure of the refractory material at the bottom. Damage to the refractory structure can shorten the blast furnace's lifespan at best, or even lead to leakage of molten iron through the brick joints in the hearth.

[0004] Currently, a common method is to use a connecting plate between the furnace shell and the furnace bottom cover to suppress the warping of the furnace bottom cover. Since the warping stress of the furnace bottom plate caused by various factors in the later stage of the blast furnace is relatively large, the method of only setting a connecting plate cannot effectively suppress the occurrence of the warping phenomenon; there is also a method of connecting the furnace bottom cover and the blast furnace foundation together with high-strength bolts to avoid the warping of the furnace bottom cover, but this method requires pre-embedded high-strength bolts, which is more expensive. Summary of the Invention

[0005] The purpose of the present invention is to provide a fixing structure for a blast furnace bottom sealing plate, so as to solve the problem in the prior art that the fixing structure for the furnace bottom sealing plate cannot effectively suppress the furnace bottom sealing plate from warping.

[0006] The above-mentioned implementation objectives of the present invention are mainly achieved by the following technical solutions:

[0007] The present invention provides a fixing structure for a blast furnace bottom sealing plate, which comprises:

[0008] A blast furnace foundation, on which an I-steel is mounted, and a boss is formed upward on the circumferential edge of the blast furnace foundation;

[0009] A furnace bottom sealing plate is mounted on the I-beam;

[0010] Wherein, an embedded part is provided on the top of the boss, and the edge of the furnace bottom sealing plate is connected to the embedded part.

[0011] In a preferred embodiment of the present invention, the embedded part is an integrated structure, which is an annular steel part fixed on the top of the boss.

[0012] In a preferred embodiment of the present invention, the embedded part is a split structure, which includes a plurality of arc-shaped steel parts spaced apart along the circumferential direction of the blast furnace foundation.

[0013] In a preferred embodiment of the present invention, the outer diameter of the boss is larger than the diameter of the furnace bottom sealing plate.

[0014] In a preferred embodiment of the present invention, the upper end surface of the embedded part and the upper end surface of the I-beam are located on the same horizontal plane.

[0015] In a preferred embodiment of the present invention, the thickness of the boss is 130 mm to 180 mm.

[0016] In a preferred embodiment of the present invention, the width of the embedded part is 260 mm to 360 mm.

[0017] In a preferred embodiment of the present invention, the thickness of the embedded part is the same as the thickness of the furnace bottom sealing plate.

[0018] In a preferred embodiment of the present invention, the blast furnace foundation is a columnar base integrally cast from concrete, and when the boss is cast and formed, the embedded parts are embedded in the top of the boss.

[0019] In a preferred embodiment of the present invention, the embedded parts and the edges of the furnace bottom sealing plate are connected together by welding.

[0020] Compared with the prior art, the technical solution of the present invention has the following characteristics and advantages:

[0021] The fixing structure of the furnace bottom sealing plate described in the present invention is a structure in which a boss is provided on the circumferential edge of the blast furnace foundation, and the circumferential edge of the furnace bottom sealing plate is fixed to the blast furnace foundation by means of embedded parts embedded in the top of the boss. The dead weight of the blast furnace foundation is used to suppress the upward warping of the furnace bottom sealing plate, thereby preventing dangerous situations such as gas leakage from the furnace bottom. The structure is simple, the effect is obvious, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0023] Figure 1 A cross-sectional view of the fixing structure of the blast furnace bottom sealing plate according to the present invention;

[0024] Figure 2 This is a schematic diagram of the distribution of the split embedded parts of the present invention.

[0025] Description of Figure Numbers:

[0026] 10. Blast furnace foundation; 11. Boss; 12. Embedded parts;

[0027] 20. I-beam; 30. Furnace bottom cover; 40. Furnace shell. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0029] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] like Figure 1 As shown, the present invention provides a fixing structure for a blast furnace bottom sealing plate, which includes: a blast furnace foundation 10, on which an I-beam 20 is mounted, and a boss 11 is formed upward on the circumferential edge of the blast furnace foundation 10; a furnace bottom sealing plate 30, which is mounted on the I-beam 20; wherein, the top of the boss 11 is provided with an embedded part 12, and the edge of the furnace bottom sealing plate 30 is connected to the embedded part 12.

[0032] A boss 11 is provided on the circumferential edge of the blast furnace foundation 10, and the periphery of the furnace bottom sealing plate 30 is fixed to the blast furnace foundation 10 by means of an embedded part 12 embedded in the top of the boss 11. The dead weight of the blast furnace foundation 10 is utilized to suppress the upward warping of the furnace bottom sealing plate 30, thereby preventing dangerous situations such as gas leakage from the furnace bottom. The structure is simple, the effect is obvious, and the cost is low.

[0033] Specifically, such as Figure 1 As shown, the blast furnace foundation 10 serves as the basic support of the entire blast furnace and is usually made of cast concrete, and its generally columnar structure; a plurality of I-beams 20 are provided on the upper end surface of the blast furnace foundation 10, and the furnace bottom cover plate 30 is connected to the I-beams 20 by welding, and the I-beams 20 provide support for the entire disc-shaped furnace bottom cover plate 30; the furnace shell 40 is connected to the upper end surface of the furnace bottom cover plate 30.

[0034] The blast furnace foundation 10 of the present invention has an annular boss 11 protruding upward from its circumferential edge. This boss 11 can be integrally formed during the casting of the blast furnace foundation 10, or can be cast separately on the existing blast furnace foundation 10, without specific limitation herein. When the boss 11 is cast, an embedded part 12 is embedded in the top of the boss 11. The embedded part 12 is fixed to the top of the boss 11 as the concrete solidifies. The periphery of the furnace bottom cover plate 30 fixed to the I-beam 20 can overlap with the position of the embedded part 12 and be fixed to the embedded part 12.

[0035] Preferably, the edges of the embedded part 12 and the furnace bottom sealing plate 30 are connected together by welding.

[0036] According to one embodiment of the present invention, the embedded part 12 is an integrated structure, which is an annular steel part fixed to the top of the boss 11. The entire annular steel part can fix the entire circumferential edge of the furnace bottom sealing plate 30, and effectively suppress the upward warping of the entire furnace bottom sealing plate 30.

[0037] According to one embodiment of the present invention, Figure 2 As shown, the embedded parts 12 are split structures, which include multiple arc-shaped steel parts spaced apart along the circumference of the blast furnace foundation 10. The split structure of the embedded parts 12 can avoid the layout of the water cooling pipes at the bottom of the furnace and rationally arrange the bottom structure of the entire blast furnace.

[0038] According to one embodiment of the present invention, Figure 1 As shown, the outer diameter of the boss 11 is larger than the diameter of the furnace bottom cover 30. In a conventional arrangement of a blast furnace bottom structure, the diameter of the blast furnace foundation 10 is usually the same as the diameter of the furnace bottom cover 30. However, in the blast furnace foundation 10 of the present invention, the radius of the entire blast furnace foundation 10 is increased due to the arrangement of the boss 11, and the annular boss 11 is arranged on the increased blast furnace foundation 10.

[0039] Specifically, such as Figure 1 As shown, the increased radius length of the blast furnace foundation 10 is determined according to the layout around the foundation, and is generally 130 mm to 180 mm. That is, the thickness L1 of the boss 11 is 130 mm to 180 mm.

[0040] According to one embodiment of the present invention, Figure 1 As shown, the width of the embedded part 12 on the boss 11 is usually set to twice the increased radius value of the blast furnace foundation 10, that is, the width L2 of the embedded part 12 is 260mm~360mm; the thickness of the embedded part 12 is the same as the thickness of the furnace bottom cover 30.

[0041] According to one embodiment of the present invention, Figure 1 As shown, the upper end surface of the embedded part 12 is located on the same horizontal plane as the upper end surface of the I-beam 20. When the furnace bottom cover plate 30 is fixed to the I-beam 20, since the upper end surface of the embedded part 12 and the upper end surface of the I-beam 20 are located on the same horizontal plane, the lower end surface of the peripheral edge of the furnace bottom cover plate 30 is placed in contact with the upper end surface of the embedded part 12, which facilitates welding of the furnace bottom cover plate 30 to the embedded part 12.

[0042] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fixing structure for a blast furnace bottom sealing plate, characterized in that: include: A blast furnace foundation, on which an I-steel is mounted, and a boss is formed upward on the circumferential edge of the blast furnace foundation; A furnace bottom sealing plate is mounted on the I-beam; Wherein, an embedded part is provided on the top of the boss, and the edge of the furnace bottom sealing plate is connected to the embedded part; The outer diameter of the boss is larger than the diameter of the furnace bottom sealing plate; The upper end surface of the embedded part and the upper end surface of the I-beam are located on the same horizontal plane.

2. The fixing structure of the blast furnace bottom sealing plate according to claim 1, characterized in that: The embedded part is an integrated structure, which is an annular steel part fixed on the top of the boss.

3. The fixing structure of the blast furnace bottom sealing plate according to claim 1, characterized in that: The embedded parts are of split structure, which include a plurality of arc-shaped steel parts spaced apart along the circumferential direction of the blast furnace foundation.

4. The fixing structure of the blast furnace bottom sealing plate according to claim 1, characterized in that: The thickness of the boss is 130 mm to 180 mm.

5. The fixing structure of the blast furnace bottom sealing plate according to claim 1, characterized in that: The width of the embedded part is 260 mm to 360 mm.

6. The fixing structure of the blast furnace bottom sealing plate according to claim 1, characterized in that: The thickness of the embedded part is the same as the thickness of the furnace bottom sealing plate.

7. The fixing structure of the blast furnace bottom sealing plate according to claim 1, characterized in that: The blast furnace foundation is a columnar base integrally cast from concrete. When the boss is cast and formed, the embedded parts are embedded in the top of the boss.

8. The fixing structure of the blast furnace bottom sealing plate according to claim 1, characterized in that: The embedded parts and the edges of the furnace bottom sealing plate are connected together by welding.

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