Submerged arc furnace pressure relief device

Abstract

The utility model discloses a pressure relief device for a submerged arc furnace, which relates to the technical field of submerged arc furnaces and comprises a pressure relief cover, a pressure relief hole is arranged on the pressure relief cover, and the pressure relief hole is communicated with a hearth of the submerged arc furnace. The exhaust cover is connected to the pressure relief hole, a plurality of exhaust holes are formed in the exhaust cover, and a floating block is movably installed in the exhaust cover; and the rope is connected to the pressure relief cover, the rope penetrates through the fixed pulley and then is connected with a balancing weight, and the side, away from the fixed pulley, of the balancing weight is connected with tension equipment. According to the pressure relief device, the pressure in the hearth is displayed and preliminarily adjusted by arranging the floating block, and the pressure relief cover is pulled to relieve pressure in combination with the tension equipment, so that the problems that an existing pressure relief device relieves pressure only when the pressure reaches a certain value, explosion in the furnace is easy to occur, and the pressure relief cover is struck away by high pressure in the furnace are solved.

Description

Technical Field

[0001] This utility model relates to the field of electric arc furnace technology, and in particular to a pressure relief device for an electric arc furnace. Background Technology

[0002] Submerged arc furnaces are mainly used for reducing and smelting ores, carbonaceous reducing agents and solvents, and other raw materials. They are mainly used to produce ferroalloy products such as ferrosilicon, ferromanganese, ferrochrome, ferrotungsten, and ferrosilicon-manganese alloys.

[0003] The pressure relief device of the submerged arc furnace cover is a pressure relief cover directly installed on top of the furnace cover, which is sealed by its own weight. When the gas pressure in the furnace is high, the pressure relief cover is opened to release the pressure.

[0004] Existing pressure relief devices for electric arc furnaces typically only release pressure when it reaches a certain value, which can easily lead to situations such as explosions inside the furnace or the pressure relief cover being blown away by the high pressure inside the furnace, posing certain safety hazards. Utility Model Content

[0005] The main objective of this invention is to provide a pressure relief device for a submerged arc furnace, which can effectively solve the problems in the prior art by adjusting the gas dissipation rate of the exhaust port according to the gas pressure inside the furnace.

[0006] To achieve the above objectives, this utility model provides a pressure relief device for a submerged arc furnace, including a pressure relief cover, an exhaust cover, and a rope;

[0007] The pressure relief cover is provided with a pressure relief hole, which is in communication with the furnace chamber of the electric arc furnace;

[0008] The exhaust cover is connected to the pressure relief hole. The exhaust cover has multiple exhaust holes. A floating block is movably installed inside the exhaust cover. The floating block is marked with scale.

[0009] The rope is connected to the pressure relief cover. After passing through the fixed pulley, the rope is connected to a counterweight. A tensioning device is connected to the side of the counterweight away from the fixed pulley.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, the pressure relief cover is filled with heat-resistant and refractory material, and the outer edge of the pressure relief cover near the furnace chamber of the electric arc furnace is set at an angle.

[0012] Furthermore, the floating block is connected to the pressure relief cover by a chain, which is used to limit the position of the floating block.

[0013] Furthermore, the floating block is made of a material with counterweight function, and the floating block is filled with heat-resistant and fire-resistant material.

[0014] Furthermore, the sensor of the tension device is connected to a control panel and a tension display device.

[0015] The beneficial effects of this utility model are as follows: This utility model provides a pressure relief device for a submerged arc furnace, which has the following advantages:

[0016] 1. This utility model reduces the pressure inside the furnace by setting an exhaust port that can adjust the gas dissipation rate according to the gas pressure inside the furnace, thus avoiding the phenomenon of explosion caused by excessive pressure inside the furnace when the pressure relief cover is opened.

[0017] 2. This utility model adjusts the pulling force of the pulling device according to the pressure inside the furnace, and pulls the pressure relief cover with a rope to achieve pressure relief. During the restoration, the counterweight blocks the pressure relief cover to prevent the pressure relief cover from falling back too fast.

[0018] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it according to the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. The specific implementation methods of this utility model are given in detail in the following embodiments and their accompanying drawings. Attached Figure Description

[0019] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a pressure relief device for a submerged arc furnace proposed in this utility model.

[0021] Figure 2 This is a schematic diagram of the pressure relief hole in a pressure relief device for a submerged arc furnace proposed in this utility model.

[0022] Figure 3 This is a schematic diagram of the exhaust cover and floating block in a pressure relief device for a submerged arc furnace proposed in this utility model.

[0023] In the diagram: 1. Pressure relief cover; 2. Pressure relief hole; 3. Exhaust cover; 4. Exhaust hole; 5. Floating block; 6. Chain; 7. Rope; 8. Fixed pulley; 9. Counterweight; 10. Tensioning device. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-3The principles and features of this utility model are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0025] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is described as "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is described as "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] like Figure 1-3 As shown, this utility model provides a pressure relief device for a submerged arc furnace, including a pressure relief cover 1, an exhaust cover 3, and a rope 7;

[0028] The pressure relief cover 1 is filled with heat-resistant and refractory material. The outer edge of the pressure relief cover 1 near the furnace chamber of the electric arc furnace is set with an inclined surface. The outer wall of the pressure relief cover 1 fits with the inner wall of the furnace chamber of the electric arc furnace. The pressure relief cover 1 is provided with a pressure relief hole 2, which is in communication with the furnace chamber of the electric arc furnace.

[0029] The exhaust cover 3 is connected to the pressure relief hole 2. The exhaust cover 3 has multiple exhaust holes 4. A floating block 5 is movably installed inside the exhaust cover 3. The floating block 5 is connected to the pressure relief cover 1 via a chain 6. The chain 6 is used to limit the position of the floating block 5, ensuring that part of the floating block 5 is always confined within the pressure relief hole 2 of the exhaust cover 3. The floating block 5 is made of a material with counterweight function and is filled with heat-resistant and refractory material. When the pressure inside the furnace is low, the floating block 5 is installed within the pressure relief hole 2 under the tension of the chain 6. This achieves the sealing of the pressure relief hole 2, allowing the pressure relief cover 1 to completely seal the electric arc furnace. When the pressure inside the furnace increases, the floating block 5 moves away from the furnace under the action of air pressure. When one end of the floating block 5 inside the furnace moves into the exhaust cover 3, the exhaust hole 4 on the exhaust cover 3 discharges the gas inside the furnace, thereby reducing the pressure inside the furnace. By setting an appropriate weight for the floating block 5, the furnace is kept in use for daily use while avoiding the phenomenon of excessive pressure inside the furnace causing an explosion when the pressure relief cover 1 is opened.

[0030] Furthermore, the floating block 5 is marked with pressure scales according to the counterweight, and the pressure inside the furnace is displayed by the degree of displacement of the floating block 5;

[0031] The rope 7 is connected to the pressure relief cover 1. The rope 7 passes through the fixed pulley 8 and is connected to the counterweight 9. The side of the counterweight 9 away from the fixed pulley 8 is connected to the tension device 10. The sensor of the tension device 10 is connected to the control panel and the tension display device.

[0032] During pressure relief, the counterweight 9 is pulled by the pulling device 10, which in turn drives the rope 7, which in turn pulls the pressure relief cover 1 to relieve pressure. The pulling force of the pulling device 10 can be adjusted according to the pressure difference displayed by the floating block 5. During restoration, the counterweight 9 impedes the pressure relief cover 1 to prevent the pressure relief cover 1 from falling back too quickly.

[0033] The working principle is as follows:

[0034] As the gas pressure inside the furnace rises, the weight of the floating block 5 gradually becomes less than the pressure exerted by the gas inside the furnace on the floating block 5. Under the influence of this pressure difference, the floating block 5 moves away from the furnace. During its movement, the pressure inside the furnace can be monitored by the markings on the floating block 5. When the floating block 5 moves to a point where it can no longer completely cover the exhaust port 4 of the exhaust cover 3, the gas inside the furnace escapes through the exhaust port 4. The higher the gas pressure inside the furnace, the larger the diameter of the exhaust port 4, and the greater the escape rate of the gas inside the furnace. The faster the speed, the more the gas dissipation speed can be adjusted according to the gas pressure in the furnace, thereby reducing the pressure in the furnace. Under the premise of meeting the daily use of the electric arc furnace, it avoids the phenomenon of excessive pressure in the furnace causing an explosion when the pressure relief cover 1 is opened. When depressurizing, the pulling force of the pulling device 10 is adjusted according to the pressure in the furnace, and the pressure relief cover 1 is pulled by the rope 7 to achieve depressurization. When restoring, the counterweight 9 blocks the pressure relief cover 1 to prevent the pressure relief cover 1 from falling back too fast.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any way. Those skilled in the art can readily implement this utility model based on the accompanying drawings and the above description. However, any modifications, alterations, or equivalent variations made by those skilled in the art without departing from the scope of the utility model's technical solution, utilizing the disclosed technical content, are considered equivalent embodiments of this utility model. Furthermore, any equivalent changes, alterations, or variations made to the above embodiments based on the essential technology of this utility model are still within the protection scope of this utility model's technical solution.

Claims

1. A pressure relief device for a submerged arc furnace, characterized in that, include: Pressure relief cover (1), the pressure relief cover (1) is provided with pressure relief hole (2), the pressure relief hole (2) is in communication with the furnace chamber of the electric arc furnace; The exhaust cover (3) is connected to the pressure relief hole (2). The exhaust cover (3) is provided with multiple exhaust holes (4). A floating block (5) is movably installed inside the exhaust cover (3). The floating block (5) is marked with a scale. A rope (7) is connected to a pressure relief cover (1). The rope (7) passes through a fixed pulley (8) and is connected to a counterweight (9). A tensioning device (10) is connected to the side of the counterweight (9) away from the fixed pulley (8).

2. The pressure relief device for a submerged arc furnace according to claim 1, characterized in that, The pressure relief cover (1) is filled with heat-resistant and refractory material, and the outer edge of the pressure relief cover (1) near the furnace chamber of the electric arc furnace is set with an inclined surface.

3. The pressure relief device for a submerged arc furnace according to claim 1, characterized in that, The floating block (5) is connected to the pressure relief cover (1) by a chain (6), which is used to limit the position of the floating block (5).

4. The pressure relief device for a submerged arc furnace according to claim 1, characterized in that, The floating block (5) is made of a material with counterweight function, and the floating block (5) is filled with heat-resistant and fire-resistant material.

5. A pressure relief device for a submerged arc furnace according to claim 1, characterized in that, The sensor of the tension device (10) is connected to a control panel and a tension display device.

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