Iron runner system for placing residual iron in hearth during overhaul of blast furnace
By designing a hot iron trough system, including the hot iron trough and the hot iron blocking plate height adjustment mechanism, the problem of safety hazards for operators during blast furnace overhaul was solved, and efficient and safe residual iron discharge was achieved.
Patent Information
- Application Number
- CN202520465859.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-17
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-17
AI Technical Summary
During blast furnace overhaul, operators need to work closely with high temperatures and dust, which poses safety hazards. Furthermore, existing technologies can easily lead to accidents where molten iron spills onto the ground when the taphole is blocked.
Design a molten iron flow channel system for residual iron in the blast furnace overhaul, including a flow channel, a blocking plate, and a blocking plate height adjustment mechanism. By adjusting the relative distance between the blocking plate and the flow channel, the flow of molten iron into the torpedo ladle can be controlled, reducing manual operation. Refractory materials and steel structure design are used to improve safety.
This reduced the labor intensity and safety risks for operators, avoided accidents involving molten iron falling to the ground, and enabled safe and efficient operation during blast furnace overhaul.
Smart Images
Figure CN223837457U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of blast furnace ironmaking technology, and more specifically, to a system for collecting residual iron from the blast furnace tapping hearth during blast furnace overhaul. Background Technology
[0002] With the increasing size of blast furnaces, the volume of the hearth and dead iron layer also increases, reaching 3000m³. 3 The above-mentioned blast furnace hearths hold over 1000 tons of iron, while the torpedo ladles used for transporting molten iron only hold about 300 tons. During a major blast furnace overhaul, more than four torpedo ladles are needed to transport the residual iron from the hearth to the steel plant. The usual method is to place one torpedo ladle at each of the two molten iron tapholes on two iron lines (most blast furnaces only have two lines). When the first torpedo ladle is full, the operator removes the iron plate at the front of the molten iron trough at the second taphole, allowing the molten iron to flow into the second ladle. Simultaneously, the operator uses sand to block the front of the first taphole. During this process, the first ladle is removed, and a third empty ladle is placed at the first taphole. When the second ladle is full, the previous steps are repeated to transfer the molten iron into the third ladle. During this process, operators need to work at close range, which poses risks of high temperatures and dust. Furthermore, when using sand to block the molten iron taphole, the impact of the flowing iron can cause it to spill onto the ground. Utility Model Content
[0003] In response to the aforementioned technical problems, a trough structure for the flow of residual iron in the blast furnace overhaul is provided.
[0004] The technical means adopted in this utility model are as follows:
[0005] A blast furnace overhaul residual iron discharge system includes a blast furnace discharge trough, a blocking plate, and a blocking plate height adjustment mechanism. The blast furnace discharge trough is connected to a blast furnace residual iron discharge device. The structure of the blocking plate matches the shape of the trough head. The output end of the blocking plate height adjustment mechanism is connected to the blocking plate, and the relative distance between the blocking plate and the trough head is adjusted based on the blocking plate height adjustment mechanism.
[0006] Furthermore, the blocking plate is a steel plate with a preset thickness, and the upper end of the blocking plate is provided with a lifting lug.
[0007] Furthermore, the upper part of the blocking plate is rectangular, and the lower part is a panel with an arc-shaped bottom, with the two ends of the arc-shaped surface smoothly transitioning to the sides of the rectangle.
[0008] Furthermore, the height adjustment mechanism of the blocking plate includes a support mechanism, a wire rope, and a pulley. The support mechanism is located at the head of the iron trough, and the wire rope passes around the pulley installed on the support mechanism and is connected to the blocking plate.
[0009] Furthermore, the iron flow channel, the iron blocking plate, and the iron blocking plate height adjustment mechanism are multiple sets, each set at a preset path point in the discharge path of the blast furnace residual iron discharge device.
[0010] Furthermore, there are three iron troughs, wherein there is a height difference between the head of the first iron trough and the head of the third iron trough, with a difference of 0.1 to 0.15 m; and there is a height difference between the head of the second iron trough and the head of the third iron trough, with a difference of 0.05 to 0.10 m.
[0011] Furthermore, the head of the iron trough consists of refractory material, refractory bricks, and steel structure from the inside out, and the shape of the refractory material matches the shape of the iron blocking plate.
[0012] Furthermore, the blast furnace residual iron discharge device is connected to the head of each iron flow trough through residual iron channels. The residual iron channels have a height of 1.0 to 1.4 m and a width of 1.8 to 1.2 m. The residual iron channels entering the iron flow trough area have a width of 1.8 to 1.0 m and a height of 0.8 to 1.0 m. The slope of the iron flow trough is 5° to 8°.
[0013] The method of using the iron trough structure for residual iron in the blast furnace overhaul tapping hearth of this utility model includes:
[0014] Based on the parameters of the flowing iron discharge, design the refractory material filling height at the head of the flowing iron ditch and the specifications of the iron-blocking plate;
[0015] Downstream of the blast furnace residual iron discharge device, each iron flow channel, iron blocking plate, and iron blocking plate height adjustment mechanism are installed sequentially.
[0016] Adjust the blocking plates that need to be opened as needed, based on the size of the iron flow before and after the residual iron is discharged, so that the residual iron enters the corresponding torpedo canister;
[0017] After the iron is released, the sealing plate falls down, and a small amount of sand is added to seal it.
[0018] Compared with existing technologies, this utility model has the following advantages: It has a simple structure, is easy to manufacture, and has low cost; using this equipment can reduce labor costs and labor intensity; by utilizing the size of the iron flow before and after the iron discharge, the height of the channel head can be gradually adjusted to ensure simple and safe operation when changing the direction of the flowing iron, avoiding the need to go to the ground. It also reduces the harm to operators caused by high temperatures and dust from close-range operation. Attached Figure Description
[0019] 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.
[0020] Figure 1 This is a schematic diagram of the working state of this utility model.
[0021] Figure 2 This is a schematic diagram of the blockage plate structure of this utility model.
[0022] Figure 3 This is a front view of the iron-blocking plate of this utility model entering the iron flow channel head.
[0023] Figure 4 This is a schematic diagram of the height adjustment mechanism for the blocking plate of this utility model.
[0024] Figure 5 This is a front view of the fluid channel of this utility model. Detailed Implementation
[0025] 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.
[0026] 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.
[0027] 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.
[0028] 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 drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.
[0029] 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.
[0030] 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.
[0031] 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.
[0032] like Figures 1-5 As shown in the figure, this utility model embodiment discloses an iron flow channel system for residual iron in the blast furnace overhaul flare hearth, including an iron flow channel, an iron blocking plate, and an iron blocking plate height adjustment mechanism. The iron flow channel is connected to the blast furnace residual iron discharge device. The structure of the iron blocking plate matches the shape of the channel head of the iron flow channel. The output end of the iron blocking plate height adjustment mechanism is connected to the iron blocking plate, and the relative distance between the iron blocking plate and the channel head of the iron flow channel is adjusted based on the iron blocking plate height adjustment mechanism.
[0033] The blocking plate is a steel plate with a preset thickness, and a lifting lug is provided at the upper end of the blocking plate. In this embodiment, the blocking plate is a 10mm thick steel plate, and its surface is coated with refractory material.
[0034] The upper part of the blocking plate is rectangular, and the lower part is a panel with an arc-shaped bottom. The two ends of the arc-shaped surface smoothly transition to the sides of the rectangle.
[0035] The height adjustment mechanism of the blocking plate includes a support mechanism, a wire rope and a pulley. The support mechanism is located at the head of the iron trough. The wire rope passes around the pulley installed on the support mechanism and is connected to the blocking plate.
[0036] The iron flow channel, the iron blocking plate, and the iron blocking plate height adjustment mechanism are in multiple sets, and are respectively set at the preset path points of the discharge path of the blast furnace residual iron discharge device.
[0037] There are three iron troughs. The first and third iron troughs have a height difference of 0.1–0.15 m between their inner heads; the second and third iron troughs have a height difference of 0.05–0.10 m between their inner heads. This height difference facilitates the plugging operation when changing the iron trough's position number.
[0038] The trough of the iron flow channel consists of refractory material, refractory bricks and steel structure from the inside to the outside, and the shape of the refractory material matches the shape of the iron blocking plate.
[0039] The blast furnace residual iron discharge device is connected to the head of each flowing iron trough via residual iron channels. The residual iron channels have a height of 1.0–1.4 m and a width of 1.8–1.2 m. The residual iron channel entering the flowing iron trough area has a width of 1.8–1.0 m and a height of 0.8–1.0 m, with a slope of 5°–8°. Theoretically, the minimum height and width should be greater than 0.8 m, increasing with the blast furnace volume. In this embodiment, the residual iron channels have a height of 1.2 m and a width of 1.2 m. The residual iron channels entering the flowing iron trough area have a width of 1.0 m and a height of 0.80 m, with a slope of 5°.
[0040] This utility model also discloses a method for using the above-mentioned blast furnace overhaul tapping hearth residual iron flow channel structure, including:
[0041] Based on the parameters of the flowing iron discharge, design the refractory material filling height at the head of the flowing iron ditch and the specifications of the iron-blocking plate;
[0042] Downstream of the blast furnace residual iron discharge device, each iron flow channel, iron blocking plate, and iron blocking plate height adjustment mechanism are installed sequentially.
[0043] Adjust the blocking plates that need to be opened as needed, based on the size of the iron flow before and after the residual iron is discharged, so that the residual iron enters the corresponding torpedo canister;
[0044] After the iron is released, the sealing plate falls down, and a small amount of sand is added to seal it.
[0045] In this embodiment, the position of the iron discharge trough is gradually lowered according to the size of the iron flow before and after discharge, based on the size of the iron flow before and after discharge. This facilitates the operation when changing the position of the iron flow trough and avoids incomplete sealing when placing the baffle, which could cause molten iron to fall to the ground. Specifically, the iron is discharged in the order of second iron flow trough → third iron flow trough → first iron flow trough → third iron flow trough. The first iron discharge position is higher to facilitate sealing, and the later iron discharge position, where the iron flow has decreased, must be at the same height as the main iron flow trough; otherwise, the molten iron may not be able to flow into the ladle.
[0046] 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 the 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 system for collecting residual iron from the blast furnace hearth during major blast furnace overhaul, characterized in that, It includes a blast furnace trough, a blocking plate, and a blocking plate height adjustment mechanism. The blast furnace trough is connected to the blast furnace residual iron discharge device. The structure of the blocking plate matches the shape of the trough head. The output end of the blocking plate height adjustment mechanism is connected to the blocking plate. The relative distance between the blocking plate and the trough head is adjusted based on the blocking plate height adjustment mechanism.
2. The blast furnace overhaul tapping system for residual iron in the blast furnace hearth according to claim 1, characterized in that, The blocking plate is a steel plate with a preset thickness, and the upper end of the blocking plate is provided with a lifting lug.
3. The blast furnace overhaul tapping system for residual iron in the blast furnace hearth according to claim 1, characterized in that, The upper part of the blocking plate is rectangular, and the lower part is a panel with an arc-shaped bottom. The two ends of the arc-shaped surface smoothly transition to the sides of the rectangle.
4. The blast furnace overhaul tapping system for residual iron in the blast furnace hearth according to claim 1, characterized in that, The height adjustment mechanism of the blocking plate includes a support mechanism, a wire rope and a pulley. The support mechanism is located at the head of the iron trough. The wire rope passes around the pulley installed on the support mechanism and is connected to the blocking plate.
5. The blast furnace overhaul tapping hearth residual iron flow channel system according to claim 1, characterized in that, The iron flow channel, the iron blocking plate, and the iron blocking plate height adjustment mechanism are in multiple sets, and are respectively set at the preset path points of the discharge path of the blast furnace residual iron discharge device.
6. The blast furnace overhaul tapping system for residual iron in the blast furnace hearth according to claim 1, characterized in that, There are three iron troughs, wherein there is a height difference of 0.1 to 0.15 m between the head of the first iron trough and the head of the third iron trough; and there is a height difference of 0.05 to 0.10 m between the head of the second iron trough and the head of the third iron trough.
7. The blast furnace overhaul tapping system for residual iron in the blast furnace hearth according to claim 1, characterized in that, The trough of the iron flow channel consists of refractory material, refractory bricks and steel structure from the inside to the outside, and the shape of the refractory material matches the shape of the iron blocking plate.
8. The blast furnace overhaul tapping system for residual iron in the blast furnace hearth according to claim 1, characterized in that, The blast furnace residual iron discharge device is connected to the head of each iron flow trough through residual iron channels. The residual iron channels are 1.0 to 1.4 m high and 1.8 to 1.2 m wide. The residual iron channels entering the iron flow trough area are 1.8 to 1.0 m wide and 0.8 to 1.0 m high. The slope of the iron flow trough is 5° to 8°.