A steel ladle cover with an operating hole and heat preservation device

Abstract

This utility model provides a ladle cover with an operating hole insulation device, relating to the field of iron and steel metallurgical technology. It includes a ladle cover body and a first and second insulation cover mounted thereon. The insulation cover consists of an asbestos layer and an iron plate covering its outer surface, and is larger than the corresponding operating hole. It has sealing flanges on its edges to achieve airtight insulation when closed. The oxygen lance operating hole insulation cover is installed below the ladle cover via a hinged component, automatically opening and closing by gravity when the ladle is tilted. The diverting agent operating hole insulation cover is fixed by an arc-shaped hook device, and its opening and closing are controlled by external pulling. When closed, the locking part engages with the slot to lock it in place. This utility model and device significantly improve the ladle insulation effect, reduce the temperature drop of molten steel, reduce the heating time and energy consumption of the LF furnace, and shorten the smelting cycle.

Description

Technical Field

[0001] This utility model relates to the field of steel metallurgical equipment technology, and more particularly to a ladle cover with an operating hole and heat preservation device. Background Technology

[0002] In the iron and steel metallurgy industry, covering the ladle for insulation is a crucial measure to reduce the temperature drop of molten steel. The existing ladle covers at the Beiying Steel Plant have significant defects at the oxygen lance operating port and the flux operating port: after operation, both ports are exposed, leading to substantial heat loss during ladle operation and a rapid drop in molten steel temperature. To compensate for this temperature drop, additional heating is required during the LF refining stage, increasing energy consumption, extending the refining cycle, and significantly raising production costs. Current technology typically lacks dedicated insulation devices for the operating ports, or uses simple covers for manual sealing, which cannot automatically open and close when the ladle is tilted, and has poor sealing performance, making effective temperature retention difficult. Furthermore, traditional covers lack differentiated designs and cannot adapt to the different process requirements of oxygen lance and flux operation, resulting in cumbersome operation and unstable insulation effects.

[0003] Therefore, there is an urgent need for a heat preservation device that can be easily opened and closed, has strong sealing performance, and is adaptable to multiple operating scenarios, in order to solve the problems of heat loss, energy waste, and low production efficiency. Utility Model Content

[0004] To address the aforementioned technical issues, a steel ladle cover with an operating hole insulation device is provided. The insulation cover is made of asbestos and iron plate and is controlled by gravity automatic opening and closing or a hook device to achieve insulation of the operating hole of the steel ladle cover, thereby reducing heat loss and energy consumption.

[0005] To achieve the above objectives, this utility model provides a ladle cover with an operating hole insulation device, comprising: two independently set insulation covers, respectively corresponding to the oxygen lance operating hole and the diverting agent operating hole on the ladle cover;

[0006] The insulation cover consists of an asbestos layer and an iron plate covering the outer surface of the asbestos layer;

[0007] The first heat preservation cover corresponding to the oxygen lance operation port is installed below the ladle cover body through a hinge component, and automatically opens and closes by gravity when the ladle is tilted.

[0008] One end of the second insulation cover corresponding to the drainage agent operation hole is fixed by a hinge component, and the other end is fixed by an arc-shaped hook device. The arc-shaped hook device includes a fixed end connected to the steel ladle cover body and an arc-shaped movable end connected to the second insulation cover, which is used to open and reset the second insulation cover by external pulling.

[0009] Furthermore, the hinge component includes a support rod fixed below the steel cover body and a rotating shaft connected to the first insulation cover. The rotating shaft is hinged to the support rod, allowing the first insulation cover to swing freely in a vertical plane around the rotating shaft.

[0010] Furthermore, the arc-shaped movable end of the arc-shaped hook device is provided with a locking part, which matches the groove on the edge of the second heat insulation cover and is used to lock the position when the second heat insulation cover is closed.

[0011] Furthermore, the asbestos layer has a thickness of 20-50mm, the iron plate has a thickness of 3-8mm, and the surface of the iron plate is coated with a high-temperature resistant coating.

[0012] Furthermore, the size of the heat-insulating cover is larger than the diameter of the corresponding operating hole, and a sealing flange is provided on the edge. When the sealing flange is in contact with the steel ladle cover body, a sealed heat-insulating structure is formed.

[0013] By adopting the above technical solution, this utility model has the following advantages compared with the prior art:

[0014] 1. The present invention provides a ladle cover with an operating hole and a heat preservation device. Through the automatic opening and closing heat preservation cover design, the heating time of each furnace in the refining LF furnace is reduced by 1 minute, the power consumption of a single furnace is reduced by about 300kWh, the temperature of the ladle body is increased from 800℃ to 1000℃, the temperature drop of molten steel is reduced, the temperature compensation requirement of the LF furnace is reduced, and the waste of electricity is directly reduced.

[0015] 2. The steel ladle cover with an operating hole and heat preservation device provided by this utility model reduces the tapping temperature of the converter and shortens the smelting cycle; reduces the processing time of the LF furnace, compresses the overall smelting cycle, increases the unit time output, automates the operation of the device, reduces manual intervention, enhances the convenience of operation, and further shortens the process connection time. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of a steel ladle cover with an operating hole and a heat preservation device as described in this utility model;

[0018] Figure 2 This is a front view of the structure of the first heat-insulating cover of a steel ladle cover with an operating hole heat-insulating device as described in this utility model;

[0019] Figure 3 This is a side view of the first heat-insulating cover of a steel ladle cover with an operating hole heat-insulating device according to the present invention;

[0020] Figure 4 This is a front view of the structure of a steel ladle cover with an operating hole and a heat preservation device, as described in this utility model.

[0021] Figure 5 This is a side view of a second heat-insulating cover for a steel ladle cover with an operating hole and a heat-insulating device, as described in this utility model.

[0022] Figure 6 This is a schematic diagram of the structure of an arc-shaped hook device for a steel ladle cover with an operating hole and a heat preservation device, as described in this utility model.

[0023] In the diagram: 1. Steel ladle cover body; 2. First insulation cover; 3. Second insulation cover; 4. Oxygen lance operating port; 5. Drainage agent operating port; 6. Hinge component; 7. Arc-shaped hook device. Detailed Implementation

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Example

[0032] like Figures 1 to 6 As shown, this utility model provides a steel ladle cover with an operating hole and a heat preservation device, including: a steel ladle cover body 1 and a first heat preservation cover 2 and a second heat preservation cover 3 installed thereon, which correspond to the oxygen lance operating hole 4 and the diverting agent operating hole 5, respectively. The first heat preservation cover 2 and the second heat preservation cover 3 are composed of an asbestos layer and an iron plate covering their outer surface. The thickness of the asbestos layer is 20-50mm, the thickness of the iron plate is 3-8mm, and the surface of the iron plate is sprayed with a high temperature resistant coating to enhance the heat radiation resistance.

[0033] The first heat-insulating cover 2 is mounted above the oxygen lance operating hole 4 via a hinge component 6. The hinge component 6 includes a support rod fixed below the ladle cover body 1 and a rotating shaft connected to the first heat-insulating cover 2. The rotating shaft and the support rod are hinged together, allowing the first heat-insulating cover 2 to swing freely in a vertical plane around the rotating shaft. When the ladle is in a normal horizontal state, the first heat-insulating cover 2 completely covers the operating hole due to gravity. When the ladle needs to be operated during ladle processing, the ladle tilts, and the first heat-insulating cover 2 automatically opens downwards under gravity. After the operation is completed, the ladle returns to a horizontal state, and the first heat-insulating cover 2 automatically resets and closes. After closing, the sealing flange fits tightly against the inner wall of the ladle cover body 1, ensuring the sealing of the operating hole.

[0034] The second heat-insulating cover 3 is installed above the drainage agent operation hole 5 via a hinge component 6. An arc-shaped hook device 7 is provided at the upper end. The arc-shaped hook device 7 includes a fixed end connected to the steel ladle cover body 1 and an arc-shaped movable end connected to the second heat-insulating cover 3. The end of the arc-shaped movable end is provided with a locking part, which matches the groove on the edge of the second heat-insulating cover 3. When drainage agent needs to be added, the operator pulls the arc-shaped movable end through an external long tube, and the second heat-insulating cover 3 rotates around the fixed end to open. After the drainage agent is added, the pulling force is released, and the second heat-insulating cover 3 returns to its original position and closes under the action of gravity. The locking part engages with the groove to lock the position. After closing, the sealing flange fits tightly with the steel ladle cover body 1, completely covering the drainage agent operation hole 5.

[0035] 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 steel ladle cover with an operating hole and a heat-insulating device, characterized in that, include: Two independently designed insulation covers correspond to the oxygen lance operation port and the diversion agent operation port on the ladle cover body, respectively. The insulation cover consists of an asbestos layer and an iron plate covering the outer surface of the asbestos layer; The first heat preservation cover corresponding to the oxygen lance operation port is installed below the ladle cover body through a hinge component, and automatically opens and closes by gravity when the ladle is tilted. One end of the second insulation cover corresponding to the drainage agent operation hole is fixed by a hinge component, and the other end is fixed by an arc-shaped hook device. The arc-shaped hook device includes a fixed end connected to the steel ladle cover body and an arc-shaped movable end connected to the second insulation cover, which is used to open and reset the second insulation cover by external pulling.

2. A steel ladle cover with an operating hole and heat preservation device according to claim 1, characterized in that, The hinge component includes a support rod fixed below the steel ladle cover body and a rotating shaft connected to the first heat-insulating cover. The rotating shaft is hinged to the support rod, allowing the first heat-insulating cover to swing freely in a vertical plane around the rotating shaft.

3. A steel ladle cover with an operating hole and heat preservation device according to claim 1, characterized in that, The arc-shaped movable end of the arc-shaped hook device is provided with a locking part, which matches the groove on the edge of the second heat insulation cover and is used to lock the position when the second heat insulation cover is closed.

4. A steel ladle cover with an operating hole and heat preservation device according to claim 1, characterized in that, The asbestos layer is 20-50mm thick, the iron plate is 3-8mm thick, and the surface of the iron plate is coated with a high-temperature resistant coating.

5. A steel ladle cover with an operating hole and heat preservation device according to any one of claims 1 to 4, characterized in that, The size of the heat-insulating cover is larger than the diameter of the corresponding operating hole, and a sealing flange is provided on the edge. When the sealing flange is in contact with the steel ladle cover body, a sealed heat-insulating structure is formed.

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