Protection device suitable for molten iron trough of blast furnace casting house

Abstract

The utility model belongs to the technical field of ironmaking, and particularly discloses a protective device suitable for a molten iron trough of a blast furnace casting house, which comprises a cover head, a cover body and a cover tail, the cover body is formed by connecting a plurality of main frames end to end, each main frame comprises a frame top, frame waists and frame legs, the frame waists are welded on two sides of the frame top, and the frame waists are welded on two sides of the frame top. Frame legs are welded to the frame waists, a clamping groove is fixedly connected to the head end of the main frame, the head ends of the frame top, the frame waists and the frame legs are welded to the clamping groove, a clamping plate is fixedly connected to the tail end of the main frame, and the tail ends of the frame top, the frame waists and the frame legs are welded to the clamping plate. Modularized installation of the molten iron trough protective cover is achieved through the clamping groove and the clamping plate, the molten iron trough protective cover is higher than the ground, the observation window is formed, workers can conveniently observe the flowing condition of the main trough, the dust removal cover is connected to the tail end of the protective cover, and dust removal is more thorough.

Description

Technical Field

[0001] This utility model relates to the field of ironmaking technology, specifically to a protective device for the molten iron trough in the blast furnace tapping area. Background Technology

[0002] The tapping of iron in a blast furnace generates a large amount of smoke and dust. The dust collectors installed above the taphole cannot effectively collect all the smoke and dust. Furthermore, the long tapping time and wide pollution area present industry-wide challenges in eliminating smoke and dust and heat radiation from the main tapping channel to the skimmer: First, the channel covers obstruct the view, hindering observation of molten iron flow and the structural condition of the main channel; second, the channel covers have poor high-temperature resistance and are easily melted and damaged, creating a vicious cycle of repeated failures and maintenance. High temperatures, smoke, and the open molten iron channel constantly threaten the safety and health of furnace workers. Therefore, the industry urgently needs an effective main tapping channel cover to eliminate smoke and heat radiation pollution and ensure safe operations at the furnace.

[0003] Publication number CN207828333U discloses a blast furnace molten iron trough cover, comprising: fastening bolts, a steel structure, high-temperature resistant glass fiber insulation cotton, and a refractory ceramic heat insulation pad; the fastening bolts fix the refractory ceramic heat insulation pad to the steel structure; the high-temperature resistant glass fiber insulation cotton is sandwiched between the steel structure and the refractory ceramic heat insulation pad. The high-temperature resistant glass fiber insulation cotton and the refractory ceramic heat insulation pad effectively prevent the conduction of heat from the molten iron. Because the thermal resistance between the materials is increased, the thermal resistance is greater, thus more effectively preventing heat transfer and effectively preventing the blast furnace trough cover from deforming due to the high temperature of the molten iron, reducing accidents caused by heat damaging the blast furnace trough cover.

[0004] However, the above scheme has the problem of not being able to observe the flow of molten iron and the structural status of the main channel in real time. Utility Model Content

[0005] The purpose of this utility model is to provide a protective device for the molten iron trough in the blast furnace tapping area, so as to solve the problem of not being able to observe the flow of molten iron and the structure of the main trough in real time while eliminating the pollution of tapping dust and heat radiation.

[0006] To achieve the above objectives, the basic solution provided by this utility model is as follows: a protective device for the molten iron trough in the blast furnace tapping area, comprising a hood head, a hood body, and a hood tail. The hood body is composed of several main frames connected end to end. Each main frame includes a frame top, a frame waist, and frame legs. Frame waists are welded to both sides of the frame top, and frame legs are welded to each frame waist. A slot is fixedly connected to the first end of the main frame. The first ends of the frame top, frame waist, and frame legs are all welded to the slot. A plate is fixedly connected to the last end of the main frame. The last ends of the frame top, frame waist, and frame legs are all welded to the plate. The plate engages with the slot of another main frame.

[0007] The hood includes a main frame and a first sealing plate, the first sealing plate being welded to the first end of the main frame, and the end of the main frame being connected to a slot.

[0008] The tail of the cover includes a main frame and a second sealing plate. The second sealing plate is welded to the end of the main frame, and the beginning of the main frame is connected to a card plate.

[0009] The principle and beneficial effects of this utility model are as follows: Because this solution adopts modular splicing installation, modules can be freely added or removed according to actual working conditions. Multiple main frame sections are spliced ​​together via slots and plates, making the transfer, conveying, installation, and movement of this device more convenient. Furthermore, the splicing joints are flat, ensuring seamless connections between sections and preventing the leakage of smoke and dust. This effectively solves the problems of smoke and dust pollution and heat radiation pollution that endanger the safety of on-site workers during iron tapping at the furnace.

[0010] Option 2, a preferred option of the basic option, features an observation window on the first sealing plate. The observation window is located in the upper middle part of the sealing plate at the head of the cover, allowing operators to observe the flow of molten iron from all angles while keeping the structural condition of the main channel fully within their field of vision.

[0011] Option 3, a preferred option of the basic scheme, has a dust outlet on the second sealing plate, which is fixedly connected to a dust extraction pipe. This creates a channel between the device and the molten iron trough, preventing dust from escaping into the workshop space. Dust is extracted from the end of the device, reducing dust pollution in the workshop.

[0012] Option 4, a preferred option of the basic scheme, involves casting refractory material, specifically high-alumina bauxite, onto the inner walls of the frame top, frame waist, and frame legs. High-alumina bauxite possesses excellent heat resistance, effectively isolating the physical heat of the molten iron while preventing its loss.

[0013] Option 5, a preferred option of the basic design, involves welding reinforcing ribs to the outer sides of the frame top, frame waist, and frame legs. These reinforcing ribs limit the overall deformation of the main frame, increase its strength, and extend the service life of the device.

[0014] Option six, a preferred option of the basic design, features lifting lugs welded to the top of the frame. This facilitates the disassembly, hoisting, and transportation of the device. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a protective device for the molten iron ditch in the tapping area of ​​a blast furnace, according to this utility model.

[0016] Figure 2 This utility model provides a front view of the main trough of molten iron in a blast furnace tapping area.

[0017] Figure 3 yes Figure 2 Sectional view at point A in the middle;

[0018] Figure 4 This is a structural diagram;

[0019] Figure 5 This is a left view of the main frame of the main trough of molten iron in the tapping area of ​​a blast furnace, according to this utility model.

[0020] Figure 6 yes Figure 5 Sectional view at point B. Detailed Implementation

[0021] The present invention will be further described in detail below through specific embodiments:

[0022] The reference numerals in the accompanying drawings of the instruction manual include: 1-head of the hood, 2-body of the hood, 3-tail of the hood, 4-main frame, 5-top of the frame, 6-waist of the frame, 7-leg of the frame, 8-slot, 9-plate, 10-first sealing plate, 11-second sealing plate, 12-observation window, 13-dust outlet, 14-dust extraction pipe, 15-refractory material, 16-reinforcing rib, 17-lifting lug.

[0023] Example

[0024] like Figures 1 to 6 As shown: A protective device for the molten iron trough in a blast furnace tapping area includes a hood head 1, a hood body 2, and a hood tail 3. The hood body 2 is composed of several main frames 4 spliced ​​end to end. Each main frame 4 includes a frame top 5, a frame waist 6, and frame legs 7. The frame top 5 is welded to the frame waist 6 on both sides, and the frame waist 6 is welded to the frame legs 7 on the other side. One end of the main frame 4 constituting the hood body 2 is connected to a slot 8, and the frame top 5, frame waist 6, and frame legs 7 are all welded to the slot 8. The other end of the main frame 4 is connected to a plate 9, and the frame top 5, frame waist 6, and frame legs 7 are all welded to the plate 9. The hood head 1 includes the main frames 4. The first sealing plate 10 is welded to the main frame 4 that constitutes the head 1. An observation window 12 is provided on the first sealing plate 10. The tail 3 includes the main frame 4 and the second sealing plate 11. The second sealing plate 11 is welded to the main frame 4 that constitutes the tail 3. A dust outlet 13 is provided on the second sealing plate. A dust extraction pipe 14 is fixedly connected to the outside of the dust outlet 13. Refractory material 15 is poured on the inner side of the top 5, waist 6 and legs 7 of the frame. The refractory material 15 is made of high alumina bauxite. Reinforcing ribs 16 are welded to the outer side of the top 5, waist 6 and legs 7 of the frame. A lifting lug is fixedly connected to the top 5 of the frame.

[0025] The implementation method of this embodiment is as follows: Connect the main hook of the crane to the lifting lug 17, and use the crane to lift the cover head 1 to directly above the starting point of the molten iron trough. Then lift the main frame 4 that constitutes the cover body 2, align the clamping plate 9 of the main frame 4 with the clamping slot 8, and insert the clamping plate 9 into the clamping slot 8. Then lift the other main frames 4 that constitute the cover body 2 and splice them in sequence until the molten iron trough is completely covered. Finally, lift the cover tail 3, align the clamping plate 9 of the cover tail 3 with the clamping slot 8 at the end of the cover body 2, and splice the cover tail 3 with the cover body 2. Connect the dust extraction pipe 14 to the dust hood of the workshop. All the smoke and dust are discharged to the cover tail 3 along the channel formed by the cover body 2 and the molten iron trough, and finally extracted by the dust removal hood. The refractory material 15 effectively isolates the physical heat of the molten iron and prevents the physical heat of the molten iron from being lost, thereby reducing the temperature of the workshop.

[0026] The above descriptions are merely embodiments of this utility model, and common knowledge regarding specific structures and characteristics is not elaborated upon here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the structure of this utility model, and these should also be considered within the scope of protection of this utility model. These modifications will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application shall be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A protection device suitable for a blast furnace casthouse trough, characterized in that: Including cover head (1), cover body (2), cover tail (3), the cover body (2) is formed by several main frames (4) first and last link, the main frame (4) includes frame top (5), frame waist (6) and frame leg (7), both sides of the frame top (5) are welded with frame waist (6), the other side of frame waist (6) is welded with frame leg (7), the first end of main frame (4) is fixedly connected with clamping groove (8), the first end of frame top (5), frame waist (6) and frame leg (7) are welded with clamping groove (8), the end of main frame (4) is fixedly connected with clamping plate (9), the end of frame top (5), frame waist (6) and frame leg (7) are welded with clamping plate (9), clamping plate (9) is connected with the clamping groove (8) of another main frame (4). The cover head (1) includes main frame (4) and first sealing plate (10), the first sealing plate (10) is welded at the first end of main frame (4), and the end of main frame (4) is connected with clamping groove (8). The cover tail (3) includes main frame (4) and second sealing plate (11), the second sealing plate (11) is welded at the end of main frame (4), and the first end of main frame (4) is connected with clamping plate (9).

2. A protection device for the iron notch of the casthouse of a blast furnace according to claim 1, characterized in that The first sealing plate (10) is provided with an observation window (12).

3. A protection device for the iron notch of the casthouse of a blast furnace according to claim 1, characterized in that, The second sealing plate (11) is provided with a dust outlet (13), and the dust outlet (13) is fixedly connected with a dust extraction pipeline (14).

4. The protection device for the iron channel of the casthouse of a blast furnace according to claim 1, characterized in that, The inner wall of frame top (5), frame waist (6) and frame leg (7) is poured with refractory (15), and the refractory (15) is high bauxite.

5. The protection device for the iron channel of the casthouse of a blast furnace according to claim 1, characterized in that The outer side of frame top (5), frame waist (6) and frame leg (7) is welded with reinforcing rib (16).

6. A protection device for the iron notch of the casthouse of a blast furnace according to claim 1, characterized in that, The frame top (5) is welded with lifting lug (17).

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