Iron runner system and method for placing residual iron in hearth in blast furnace overhaul

Abstract

The iron runner system comprises an iron runner, an iron blocking plate and an iron blocking plate height adjusting mechanism, the iron runner is connected with a blast furnace residual iron discharging device, and the structure of the iron blocking plate is matched with the shape of a runner head of the iron runner; the output end of the iron blocking plate height adjusting mechanism is connected with the iron blocking plate, and the relative distance between the iron blocking plate and the runner head of the iron runner is adjusted based on the iron blocking plate height adjusting mechanism. The device is simple in structure, convenient to manufacture and low in cost; after the equipment is used, the labor cost can be reduced, and the labor intensity is reduced; and the height of the runner head is gradually adjusted by utilizing the size of iron flow in the front and later stages of iron discharging, so that the operation is simple and safe when the direction of the iron flow is changed, and iron flow underground accidents are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of blast furnace ironmaking, and in particular to an iron flow channel system and method for removing residual iron from a hearth during blast furnace overhaul. Background Art

[0002] As blast furnaces become larger, the volume of the furnace hearth and dead iron layer also increases. 3 The above blast furnaces have a storage capacity of more than 1,000 tons of iron, while the storage capacity of the torpedo tanks used to transport molten iron is only about 300 tons. It takes more than 4 torpedo tanks to transport the residual iron in the furnace to the steel plant when the blast furnace is overhauled. The usual method is to place a torpedo tank on each of the two iron outlets on the two iron wires (most of them have only two iron wires). When the first torpedo tank is full at the No. 1 position, the operator will pull out the iron plate at the front end of the No. 2 iron outlet that flows into the second tank, allowing the molten iron to flow into the second tank. At the same time, the operator uses river sand to block the front end of the No. 1 position, pulls away the first tank during the period, and then puts the third empty tank at the No. 1 position. When the second tank is full, repeat the previous steps to put the molten iron into the third tank. During the above operation, the operator needs to operate at close range, which may cause damage to the human body due to high temperature and dust. At the same time, when sand is used to block the iron outlet, the impact of the iron flow cannot be blocked, resulting in an accident in which the molten iron falls to the ground. Summary of the invention

[0003] According to the technical problems raised above, an iron flow channel structure and method for removing residual iron from the hearth during blast furnace overhaul are provided.

[0004] The technical means adopted by the present invention are as follows:

[0005] A iron flow ditch system for discharging residual iron from a hearth during blast furnace overhaul comprises an iron flow ditch, an iron blocking plate and an iron blocking plate height adjustment mechanism, wherein the iron flow ditch is connected to a blast furnace residual iron discharge device, the structure of the iron blocking plate matches the shape of a ditch head of the iron flow ditch, 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 ditch head of the iron flow ditch is adjusted based on the iron blocking plate height adjustment mechanism.

[0006] Furthermore, the iron blocking plate is a steel plate with a preset thickness, and a lifting lug is provided at the upper end of the iron blocking plate.

[0007] Furthermore, the upper portion of the iron blocking plate is a rectangle, and the lower portion is a panel with an arc-shaped bottom end, and both ends of the arc-shaped surface smoothly transition to the side edges of the rectangle.

[0008] Furthermore, the iron blocking plate height adjustment mechanism includes a supporting mechanism, a steel wire rope and a pulley. The supporting mechanism is arranged at the groove head of the iron flow groove. After the steel wire rope passes around the pulley installed on the supporting mechanism, it is connected to the iron blocking plate.

[0009] Furthermore, the iron flow groove, the iron blocking plate and the iron blocking plate height adjustment mechanism are multiple sets, which are respectively arranged at preset path points of the discharge path of the blast furnace residual iron discharge device.

[0010] Furthermore, there are three iron flow grooves, among which there is a height difference between the groove head of the first iron flow groove and the groove head of the third iron flow groove, the difference is 0.1 to 0.15m; there is a height difference between the groove head of the second iron flow groove and the groove head of the third iron flow groove, the difference is 0.05 to 0.10m.

[0011] Furthermore, the groove head of the iron flow groove is composed 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.

[0012] Furthermore, the blast furnace residual iron discharge device is connected to the groove head of each iron flow groove through a residual iron groove, the residual iron groove has a height of 1.0-1.4m and a width of 1.8-1.2m, the residual iron groove entering the iron flow groove area has a width of 1.8-1.0m and a height of 0.8-1.0m, and the slope of the iron flow groove is 5°-8°.

[0013] The present invention also discloses a method for using the iron flow channel structure for releasing residual iron from the hearth during blast furnace overhaul, comprising:

[0014] Based on the iron flow discharge parameters, design the refractory filling height of the iron flow channel head and the specifications of the iron blocking plate;

[0015] The iron flow grooves, the iron blocking plates and the iron blocking plate height adjustment mechanism are sequentially installed downstream of the blast furnace residual iron discharge device;

[0016] According to the size of the front and rear iron flow when releasing the residual iron, adjust the iron blocking plate to be opened as needed to allow the residual iron to enter the corresponding torpedo tank;

[0017] After the iron is released, the iron blocking plate falls down and a small amount of sand is added to seal it.

[0018] Compared with the prior art, the present invention has the following advantages: the present invention has a simple structure, is easy to manufacture, and has a low cost; after using the equipment, it can reduce labor costs and labor intensity; by using the size of the iron flow before and after iron release, the height of the ditch head is gradually adjusted to ensure that the operation of changing the direction of the iron flow is simple and safe, and it avoids going to the ground. It reduces the damage to operators caused by high temperature and dust caused by close operation of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention 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, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0020] Figure 1 It is a schematic diagram of the working state of the present invention.

[0021] Figure 2 It is a schematic diagram of the structure of the iron blocking plate of the present invention.

[0022] Figure 3 It is a front view of the iron blocking plate of the present invention entering the iron flow groove head.

[0023] Figure 4 It is a schematic diagram of the height adjustment mechanism of the iron blocking plate of the present invention.

[0024] Figure 5 It is the front view of the fluid channel of the present invention. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in 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. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0028] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0030] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0031] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0032] like Figures 1 to 5As shown, an embodiment of the present invention discloses an iron flow ditch system for discharging residual iron from a hearth during blast furnace overhaul, comprising an iron flow ditch, an iron blocking plate and an iron blocking plate height adjustment mechanism, wherein the iron flow ditch is connected to a residual iron discharge device of the blast furnace, the structure of the iron blocking plate matches the shape of a ditch head of the iron flow ditch, 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 ditch head of the iron flow ditch is adjusted based on the iron blocking plate height adjustment mechanism.

[0033] The iron blocking plate is a steel plate with a preset thickness, and a lifting lug is arranged on the upper end of the iron blocking plate. In this embodiment, the iron blocking plate is a 10 mm thick steel plate, and a refractory material is sprayed on its surface.

[0034] The upper part of the iron blocking plate is rectangular, and the lower part is a panel with an arc surface at the bottom, and the two ends of the arc surface smoothly transition to the side edges of the rectangle.

[0035] The iron blocking plate height adjustment mechanism includes a supporting mechanism, a steel wire rope and a pulley. The supporting mechanism is arranged at the groove head of the iron flow groove. The steel wire rope passes around the pulley installed on the supporting mechanism and is connected to the iron blocking plate.

[0036] The iron flow groove, the iron blocking plate and the iron blocking plate height adjustment mechanism are multiple sets, which are respectively arranged at preset path points of the discharge path of the blast furnace residual iron discharge device.

[0037] There are three iron flow grooves, among which there is a height difference between the first iron flow groove and the third iron flow groove, the difference is 0.1-0.15m; there is a height difference between the second iron flow groove and the third iron flow groove, the difference is 0.05-0.10m. Such a height difference is conducive to the plugging operation when changing the position of the iron flow groove.

[0038] The groove head of the iron flow groove is composed 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 groove head of each iron flow groove through the residual iron groove. The residual iron groove has a height of 1.0-1.4m and a width of 1.8-1.2m. The residual iron groove entering the iron flow groove area has a width of 1.8-1.0m and a height of 0.8-1.0m. The slope of the iron flow groove is 5°-8°. Theoretically, the height and width can be greater than 0.8m at a minimum, and increase with the increase of the blast furnace capacity. In this embodiment, the residual iron groove has a height of 1.2m and a width of 1.2m. The residual iron groove entering the iron flow groove area has a width of 1.0m and a height of 0.80m. The slope of the iron flow groove is 5°.

[0040] The present invention also discloses a method for using the iron flow channel structure for releasing residual iron from the hearth during blast furnace overhaul, comprising:

[0041] Based on the iron flow discharge parameters, design the refractory filling height of the iron flow channel head and the specifications of the iron blocking plate;

[0042] The iron flow grooves, the iron blocking plates and the iron blocking plate height adjustment mechanism are sequentially installed downstream of the blast furnace residual iron discharge device;

[0043] According to the size of the front and rear iron flow when releasing the residual iron, adjust the iron blocking plate to be opened as needed to allow the residual iron to enter the corresponding torpedo tank;

[0044] After the iron is released, the iron blocking plate falls down and a small amount of sand is added to seal it.

[0045] In this embodiment, according to the size of the front and rear iron flows when releasing the residual iron, the front and rear iron release positions are gradually lowered when building the iron flow channel, which is conducive to the operation when changing the position of the iron flow channel, and avoids the blocking when placing the baffle plate, causing the molten iron to fall to the ground. Specifically, the iron is released in the order of the second iron flow channel → the third iron flow channel → the first iron flow channel → the third iron flow channel. The iron is released at a high position first, which is convenient for blocking. After the iron is released, the iron flow has become smaller and can only be as high as the main iron channel, otherwise the molten iron may not flow into the tank.

[0046] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An iron flow channel system for removing residual iron from the hearth during blast furnace overhaul, characterized in that: It includes an iron flow ditch, an iron blocking plate and an iron blocking plate height adjusting mechanism. The iron flow ditch is connected to a blast furnace residual iron discharge device. The structure of the iron blocking plate matches the shape of a ditch head of the iron flow ditch. The output end of the iron blocking plate height adjusting mechanism is connected to the iron blocking plate. The relative distance between the iron blocking plate and the ditch head of the iron flow ditch is adjusted based on the iron blocking plate height adjusting mechanism.

2. The iron flow channel system for removing residual iron from the hearth during blast furnace overhaul according to claim 1 is characterized in that: The iron blocking plate is a steel plate with a preset thickness, and a lifting lug is arranged at the upper end of the iron blocking plate.

3. The iron flow channel system for removing residual iron from the hearth during blast furnace overhaul according to claim 1, characterized in that: The upper part of the iron blocking plate is rectangular, and the lower part is a panel with an arc surface at the bottom, and the two ends of the arc surface smoothly transition to the side edges of the rectangle.

4. The iron flow channel system for removing residual iron from the hearth during blast furnace overhaul according to claim 1, characterized in that: The iron blocking plate height adjustment mechanism includes a supporting mechanism, a steel wire rope and a pulley. The supporting mechanism is arranged at the groove head of the iron flow groove. The steel wire rope passes around the pulley installed on the supporting mechanism and is connected to the iron blocking plate.

5. The iron flow channel system for removing residual iron from the hearth during blast furnace overhaul according to claim 1, characterized in that: The iron flow groove, the iron blocking plate and the iron blocking plate height adjustment mechanism are multiple sets, which are respectively arranged at preset path points of the discharge path of the blast furnace residual iron discharge device.

6. The iron flow channel system for removing residual iron from the hearth during blast furnace overhaul according to claim 1, characterized in that: There are three iron flow grooves, among which there is a height difference between the groove head of the first iron flow groove and the groove head of the third iron flow groove, the difference is 0.1-0.15m; there is a height difference between the groove head of the second iron flow groove and the groove head of the third iron flow groove, the difference is 0.05-0.10m.

7. The iron flow channel system for removing residual iron from the hearth during blast furnace overhaul according to claim 1, characterized in that: The groove head of the iron flow groove is composed 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 iron flow channel system for removing residual iron from the hearth during blast furnace overhaul according to claim 1, characterized in that: The blast furnace residual iron discharge device is connected to the groove head of each iron flow groove through a residual iron groove. The residual iron groove has a height of 1.0-1.4m and a width of 1.8-1.2m. The residual iron groove entering the iron flow groove area has a width of 1.8-1.0m and a height of 0.8-1.0m. The slope of the iron flow groove is 5°-8°.

9. A method for using the iron flow channel system for removing residual iron from the hearth during blast furnace overhaul as claimed in any one of claims 1 to 8, characterized in that: include: Based on the iron flow discharge parameters, design the refractory filling height of the iron flow channel head and the specifications of the iron blocking plate; The iron flow grooves, the iron blocking plates and the iron blocking plate height adjustment mechanism are sequentially installed downstream of the blast furnace residual iron discharge device; According to the size of the front and rear iron flow when releasing the residual iron, adjust the iron blocking plate to be opened as needed to allow the residual iron to enter the corresponding torpedo tank; After the iron is released, the iron blocking plate falls down and a small amount of sand is added to seal it.

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