Casting LF furnace cover

Abstract

The utility model relates to a casting LF furnace cover which comprises a bottom edge, a furnace cover body and an exhaust fume collecting hood which are of an integrated structure, an upper cover opening is formed in the top of the exhaust fume collecting hood and is a big-end-up taper hole, an upper cover is embedded into the upper cover opening in a matched mode, an electrode hole is formed in the upper cover, and a cone is arranged on the upper portion of the furnace cover body and connected with a discharging elephant trunk. The discharging elephant trunk comprises a vertical section pipe body and an inclined section pipe body. A cavity is formed in the upper cover and filled with refractory materials. Water cooling is not needed, the problem of water leakage of an existing water-cooled furnace cover does not exist, the failure rate of the LF furnace is reduced, and meanwhile molten steel temperature drop can be reduced. The casting LF furnace cover is high in cold and hot strength, heat radiation and heat loss are reduced, and the service life is long.

Description

Technical Field

[0001] The utility model relates to a LF furnace cover, in particular to a casting LF furnace cover. Background Art

[0002] The LF furnace strengthens the thermodynamic and kinetic conditions of metallurgical reactions through arc heating, reducing atmosphere in the furnace, white slag refining, gas stirring and other means, so that the molten steel can achieve refining effects such as deoxidation, desulfurization, alloying and heating in a short time.

[0003] The LF furnace cover is a critical component, stabilizing the electrodes, collecting fumes generated during the smelting process, and feeding various slags and alloys into the furnace. It also maintains positive pressure within the ladle during the refining process. The original water-cooled cover was leaking severely, impacting refined steel production during the LF furnace failure. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a casting LF furnace cover, which can reduce the temperature drop of molten steel and lower the failure rate of the LF furnace.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A casting LF furnace cover comprises an integrated bottom edge, a cover body and a smoke collecting hood. The top of the smoke collecting hood is provided with an upper cover opening, in which the upper cover is fitted and embedded. The upper cover is provided with electrode holes. The upper part of the cover body is a cone, to which a material discharge chute is connected. The material discharge chute comprises a vertical section pipe body and an inclined section pipe body.

[0007] The bottom edge, the furnace cover body and the smoke collecting hood are integrally cast.

[0008] The opening of the upper cover is a tapered hole that is larger at the top and smaller at the bottom.

[0009] A cavity is provided in the upper cover, and the cavity is filled with refractory material.

[0010] The angle between the inclined section of the discharge chute and the horizontal is 45-50 degrees.

[0011] The vertical section pipe body and the inclined section pipe body are connected through a flange.

[0012] Both sides of the upper cover are provided with lifting ears.

[0013] Compared with the existing technology, the beneficial effects of the utility model are:

[0014] 1. The utility model does not require water cooling, and does not have the problem of water leakage in the existing water-cooled furnace cover, which reduces the failure rate of the LF furnace and can also reduce the temperature drop of the molten steel.

[0015] 2. The casting LF furnace cover has high cold and hot strength, reduces heat radiation and heat loss, and has a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the present utility model.

[0017] Figure 2 It is a plan view of the utility model.

[0018] In the figure: bottom edge 1, furnace cover body 2, smoke collecting hood 3, upper cover opening 4, upper cover 5, electrode hole 6, discharge chute 7, lifting ear 8, vertical section pipe body 71, inclined section pipe body 72. DETAILED DESCRIPTION

[0019] In the description of this utility model, it should be understood that the terms "first," "second," etc. are used for descriptive purposes only and should not be construed to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first," "second," etc. may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means more than two.

[0020] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0021] A casting LF furnace cover includes an integrated bottom edge 1, a furnace cover body 2, and a smoke collection hood 3. The top of the smoke collection hood 3 is provided with an upper cover opening 4, and an upper cover 5 is embedded in the upper cover opening 4. The upper cover 5 is provided with an electrode hole 6. The upper part of the furnace cover body 2 is a cone, and the cone is connected to a discharge chute 7. The discharge chute 7 includes a vertical section pipe body 71 and an inclined section pipe body 72.

[0022] The bottom edge 1, the furnace cover body 2 and the smoke collecting hood 3 are integrally cast.

[0023] The upper cover opening 4 is a tapered hole that is larger at the top and smaller at the bottom.

[0024] The upper cover 5 is provided with a cavity, which is filled with refractory material.

[0025] The angle between the inclined section pipe body 72 of the discharge chute 7 and the horizontal is 45-50 degrees.

[0026] The vertical section pipe body 71 and the inclined section pipe body 72 are connected via flanges.

[0027] Lifting ears 8 are provided on both sides of the upper cover 5 .

[0028] To make the purpose, technical solution, and technical effects of the present invention more clearly understood, the technical solutions in the embodiments of the present invention are now described clearly and completely. However, the embodiments described below are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art without inventive effort in conjunction with the embodiments of the present invention are also within the scope of protection of the present invention.

[0029] Example 1:

[0030] A casting LF furnace cover comprises a bottom edge 1, a cover body 2, and a fume hood 3. The bottom edge 1, cover body 2, and fume hood 3 are integrally cast. The top of the fume hood 3 is provided with an upper cover opening 4, which is a tapered hole with a larger top and smaller bottom. An upper cover 5 is fitted into the upper cover opening 4. The upper cover 5 comprises a metal shell, the cavity of which is filled with refractory material.

[0031] Lifting lugs 8 are provided on both sides of the upper cover 5. Electrode holes 6 are provided on the upper cover 5. The upper portion of the furnace cover body 2 is conical, connected to a discharge chute 7. This chute comprises a vertical section 71 and an inclined section 72. The vertical section 71 and the inclined section 72 are connected by flanges. The angle between the inclined section 72 and the horizontal is 45°.

[0032] Example 2:

[0033] A casting LF furnace cover comprises a bottom edge 1, a cover body 2, and a fume hood 3. The bottom edge 1, cover body 2, and fume hood 3 are integrally cast. The top of the fume hood 3 is provided with an upper cover opening 4, which is a tapered hole with a larger top and smaller bottom. An upper cover 5 is fitted into the upper cover opening 4. The upper cover 5 comprises a metal shell, the cavity of which is filled with refractory material.

[0034] Lifting lugs 8 are provided on both sides of the upper cover 5. Electrode holes 6 are provided on the upper cover 5. The upper portion of the furnace cover body 2 is conical, connected to a discharge chute 7. This chute comprises a vertical section 71 and an inclined section 72. The vertical section 71 and the inclined section 72 are connected by flanges. The angle between the inclined section 72 and the horizontal is 50°.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and basic spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A casting LF furnace cover, characterized in that: It includes an integrated bottom edge, a furnace cover body, and a smoke collecting hood. The top of the smoke collecting hood is provided with an upper cover opening, in which the upper cover is embedded. The upper cover is provided with an electrode hole. The upper part of the furnace cover body is a cone, and the cone is connected to a discharge chute. The discharge chute includes a vertical section pipe body and an inclined section pipe body.

2. The casting LF furnace cover according to claim 1, characterized in that: The bottom edge, the furnace cover body and the smoke collecting hood are integrally cast.

3. The casting LF furnace cover according to claim 1, characterized in that: The opening of the upper cover is a tapered hole that is larger at the top and smaller at the bottom.

4. The casting LF furnace cover according to claim 1, characterized in that: A cavity is provided in the upper cover, and the cavity is filled with refractory material.

5. The casting LF furnace cover according to claim 1, characterized in that: The angle between the inclined section of the discharge chute and the horizontal is 45-50 degrees.

6. The casting LF furnace cover according to claim 1, characterized in that: The vertical section pipe body and the inclined section pipe body are connected through a flange.

7. The casting LF furnace cover according to claim 1, characterized in that: Both sides of the upper cover are provided with lifting ears.

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