Blast furnace slag notch cast iron cover plate

Abstract

This utility model provides a cast iron cover for a blast furnace slag ditch, comprising a shell and a refractory castable lining. The shell is a hollow cuboid structure composed of a bottom plate and side plates. The front end of the bottom plate has an outwardly extending edge, and the rear end of the shell has a stepped indentation opposite to the outer edge. Several T-shaped structures are spaced along the length of the inner surface of the bottom plate. Straight grooves are formed on the inner surfaces of two opposite side plates. Multiple heat-resistant round steel bars are also disposed inside the shell, with both ends of the heat-resistant round steel bars inserted into the two straight grooves. Several Y-shaped anchor hooks are welded at intervals to the top of the T-shaped structures, with one heat-resistant round steel bar on each side of each row of anchor hooks. The refractory castable lining is formed by pouring refractory material into the shell and drying it. This utility model solves the problem of the rock wool heat-resistant insulation layer falling off in existing blast furnace slag ditch covers.

Description

Technical Field

[0001] This utility model relates to the field of blast furnace technology, and more specifically, to a cast iron cover plate for blast furnace slag trenches. Background Technology

[0002] Currently, it is generally known that large blast furnace slag trench covers are made of a metal steel structure with rock wool filling inside. The disadvantages are that during installation, the fine fibers of the heat-resistant rock wool can easily be inhaled or swallowed, potentially causing rashes, itching, and lung problems. Rock wool boards are highly absorbent, and excessive moisture can accumulate inside the cover, increasing the weight on the insulation layer over time, leading to insulation detachment and increased repair rates. Especially when severely damaged, the cover surface turns a dark reddish-brown due to high temperatures, and workers often experience smoke coming from their shoes when walking through the slag trench, affecting their safety. Furthermore, the sealing is extremely poor; red molten slag can be seen through the gaps between adjacent covers, and high-temperature fumes and dust particles escape from these gaps, causing severely excessive dust concentrations at the iron tapping area, resulting in a smoky and polluted environment. Utility Model Content

[0003] In response to the aforementioned technical problem that the existing blast furnace slag trench cover plate uses rock wool heat-resistant material insulation layer falling off, which increases the repair rate, a cast iron blast furnace slag trench cover plate is provided that has strong load-bearing capacity, good heat insulation, good sealing performance, and safe anti-slip performance.

[0004] The technical means adopted in this utility model are as follows: A cast iron cover for a blast furnace slag ditch, the cover having a rectangular parallelepiped structure, comprising a shell and a refractory castable lining; the shell is made of nickel-based austenitic cast iron; The shell is a hollow cuboid structure composed of a bottom plate and side plates; the front end of the bottom plate is provided with an outwardly extending edge, and the rear end of the shell is provided with a stepped indentation opposite to the outer edge, the outer edge and the indentation having the same shape and size; a number of T-shaped structures are spaced along the length direction on the inner surface of the bottom plate, the T-shaped structures are arranged along the width direction of the bottom plate, and an inverted T-shaped groove is formed between adjacent T-shaped structures; The shell has straight grooves symmetrically formed along the length direction on the inner surfaces of the two opposite side plates in the width direction, passing through the front and rear end faces of the side plates; the shell also has multiple heat-resistant round steel bars, with the two ends of the heat-resistant round steel bars inserted into the two opposite straight grooves respectively; the top of the T-shaped structure is welded with several Y-shaped anchor hooks at intervals, and each row of anchor hooks has a heat-resistant round steel bar on each side, and the anchor hooks are welded and fixed to the heat-resistant round steel bars; The refractory castable lining is formed by pouring refractory material into the shell and drying it.

[0005] Furthermore, the outer surface of the base plate is cast with diamond-shaped grooves.

[0006] Furthermore, four spherical recesses are symmetrically arranged at the four corners of the outer surface of the base plate, and arc-shaped lifting rings are installed inside the spherical recesses. The arc-shaped lifting rings are integral with the shell.

[0007] Furthermore, the diameter of the heat-resistant round steel is equal to the width of the straight groove.

[0008] Furthermore, the heat-resistant round steel is made of 12Cr1MoV material, and the anchor hook is made of Q235 material; the anchor hook and the heat-resistant round steel are welded together using J506 low-hydrogen potassium type welding rods.

[0009] Compared with the prior art, the present invention has the following advantages: 1. The cast iron cover plate for blast furnace slag ditch provided by this utility model adopts nickel-based austenitic cast iron support shell. Due to the presence of more nickel and hard alloy, it has higher strength and hardness and can withstand higher loads. In addition, this cast iron contains a large amount of carbides and hard alloy, thus having excellent wear resistance and wear crack resistance, making it suitable for the needs of blast furnace slag ditch.

[0010] 2. The cast iron cover plate for blast furnace slag trench provided by this utility model has an internal refractory castable that can maintain stability and durability in a high-temperature environment, effectively resist the damage of high temperature and thermal shock, and resist the corrosion of chemical substances.

[0011] 3. The cast iron cover plate for blast furnace slag troughs provided by this utility model allows for rapid repair of the refractory castable during blast furnace operation, reducing blast furnace production losses caused by damage to the cast iron cover plate for slag troughs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the cast iron cover plate structure for the blast furnace slag ditch described in this utility model.

[0014] Figure 2 This is a schematic diagram of the I-shaped groove and the straight groove structure of this utility model.

[0015] Figure 3This is a schematic diagram of the heat-resistant round steel and the anchor hook structure of this utility model.

[0016] Figure 4 This is a schematic diagram of the cast iron cover plate structure for the blast furnace slag ditch described in this utility model.

[0017] In the figure: 1. Shell; 2. Refractory castable lining; 3. Diamond groove; 4. Spherical pit; 5. Arc-shaped lifting ring; 6. Outer edge; 7. Inner concave; 8. T-shaped structure; 9. Straight groove; 10. Heat-resistant round steel; 11. Anchor hook. Detailed Implementation

[0018] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this utility model or its application or use. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to the present invention. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0021] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0022] In the description of this utility model, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0023] For ease of description, spatial relative terms such as "above," "over," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation besides the orientation of the device as described in the figures. For example, if the device in the figures is inverted, a device described as "above" or "above" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0024] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0025] Example 1 like Figure 1-4 As shown, this utility model provides a cast iron cover plate for blast furnace slag trenches. The cover plate has a rectangular parallelepiped structure, including a shell 1 and a refractory castable lining 2. The shell 1 is made of nickel-based austenitic cast iron. The shell 1 is a hollow cuboid structure composed of a bottom plate and side plates; The front end of the base plate is provided with an outwardly extending outer edge 6, and the rear end of the housing 1 is provided with a stepped inner recess 7 opposite to the outer edge 6. The outer edge 6 and the inner recess 7 have the same shape and size. In use, two adjacent cover plates are seamlessly connected by having the outer edge 6 of one cover plate overlap the inner recess 7 of the other cover plate. Several T-shaped structures 8 are spaced along the length direction on the inner surface of the base plate. The T-shaped structures 8 are arranged along the width direction of the base plate, and an inverted T-shaped groove is formed between adjacent T-shaped structures 8. The housing 1 has straight grooves 9 symmetrically formed along the length direction on the inner surfaces of the two opposite side plates in the width direction, which penetrate the front and rear end faces of the side plates; the housing 1 also has a plurality of heat-resistant round steel bars 10, the two ends of which are respectively inserted into the two opposite straight grooves 9. The top of the T-shaped structure 8 is welded with several Y-shaped anchor hooks 11 at intervals. Each row of anchor hooks 11 is provided with a heat-resistant round steel bar 10 on both sides. The anchor hooks 11 are welded and fixed to the heat-resistant round steel bars 10. After refractory material is poured into the shell 1 and dried, the refractory castable lining 2 is formed. The T-shaped structure 8, the heat-resistant round steel 10 and the anchor hook 11 are all located inside the refractory castable lining 2.

[0026] Furthermore, the outer surface of the base plate is cast with diamond-shaped grooves 3, which can increase friction and play a role in preventing slippage.

[0027] Furthermore, four spherical recesses 4 are symmetrically arranged at the four corners of the outer surface of the base plate. An arc-shaped lifting ring 5 is installed inside the spherical recesses 4. The arc-shaped lifting ring 5 is an integral structure with the shell 1 and can be directly cast into the shell 1.

[0028] Furthermore, the diameter of the heat-resistant round steel 10 is equal to the width of the straight groove 9.

[0029] Furthermore, the anchoring hook 11 and the heat-resistant round steel 10 form a spider web-like structure.

[0030] Furthermore, the heat-resistant round steel 10 is made of 12Cr1MoV material, and the anchor hook 11 is made of Q235 material; the anchor hook 11 and the heat-resistant round steel 10 are welded together using J506 low-hydrogen potassium type welding rod.

[0031] Furthermore, when casting refractory materials, a vibrator can be used to help the refractory material expel air through high-frequency vibration, making the refractory castable lining 2 more uniform and dense, avoiding the generation of air bubbles and voids, improving the density of the cover plate, and extending its service life.

[0032] The blast furnace slag trough cast iron cover plate provided by this utility model uses a nickel-based austenitic cast iron support shell. Due to its high nickel and hard alloy content, it has higher strength and hardness, and can withstand higher loads. Furthermore, this cast iron contains a large amount of carbides and hard alloys, thus exhibiting excellent wear resistance and wear crack resistance, making it suitable for the needs of blast furnace slag troughs. Nickel-based austenitic cast iron can withstand the erosion, corrosion, and abrasion of various chemical media. At high temperatures, it still maintains good strength and other physical properties. Its matrix structure is austenitic, making it less prone to deformation or cracking due to rapid heating or cooling. The refractory castable inside the cover plate maintains stability and durability at high temperatures, effectively resisting damage from high temperatures and thermal shock, while also resisting chemical corrosion. During blast furnace operation, the refractory castable can be quickly repaired, reducing blast furnace production losses caused by damage to the slag trough cast iron cover plate.

[0033] The cast iron cover plate for blast furnace slag trench provided by this utility model has excellent resistance to thermal shock and thermal creep, and is not easily deformed or cracked due to sudden cooling or heating.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cast iron cover for a blast furnace slag ditch, characterized in that, The cover plate has a rectangular parallelepiped structure, including a shell and a refractory castable lining; the shell is made of nickel-based austenitic cast iron; The shell is a hollow cuboid structure composed of a bottom plate and side plates; the front end of the bottom plate is provided with an outwardly extending edge, and the rear end of the shell is provided with a stepped indentation opposite to the outer edge, the outer edge and the indentation having the same shape and size; a number of T-shaped structures are spaced along the length direction on the inner surface of the bottom plate, the T-shaped structures are arranged along the width direction of the bottom plate, and an inverted T-shaped groove is formed between adjacent T-shaped structures; The shell has straight grooves symmetrically formed along the length direction on the inner surfaces of the two opposite side plates in the width direction, passing through the front and rear end faces of the side plates; the shell also has multiple heat-resistant round steel bars, with the two ends of the heat-resistant round steel bars inserted into the two opposite straight grooves respectively; the top of the T-shaped structure is welded with several Y-shaped anchor hooks at intervals, and each row of anchor hooks has a heat-resistant round steel bar on each side, and the anchor hooks are welded and fixed to the heat-resistant round steel bars; The refractory castable lining is formed by pouring refractory material into the shell and drying it.

2. The cast iron cover plate for blast furnace slag trenches according to claim 1, characterized in that, The outer surface of the base plate is cast with diamond-shaped grooves.

3. The cast iron cover plate for blast furnace slag trenches according to claim 1, characterized in that, Four spherical recesses are symmetrically arranged at the four corners of the outer surface of the base plate. An arc-shaped lifting ring is installed inside the spherical recess, and the arc-shaped lifting ring is an integral structure with the shell.

4. The cast iron cover plate for blast furnace slag trenches according to claim 1, characterized in that, The diameter of the heat-resistant round steel is equal to the width of the straight groove.

5. The cast iron cover plate for blast furnace slag trenches according to claim 1, characterized in that, The heat-resistant round steel is made of 12Cr1MoV material, and the anchor hook is made of Q235 material; the anchor hook and the heat-resistant round steel are welded together using J506 low-hydrogen potassium type welding rod.

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