Electric arc furnace cover and electric arc furnace

Abstract

The utility model discloses an electric arc furnace cover, comprising a furnace cover body, the interior of the furnace cover body forming a cooling cavity, a smoke exhaust pipe being installed on the furnace cover body, the smoke exhaust pipe being connected with the cooling cavity, and the smoke exhausted by the smoke exhaust pipe being filtered by cooling water in the cooling cavity, and being discharged through an air guide pipe connected with the cooling cavity and installed at the upper end of the furnace cover body, by the coordinated use of the set limiting ring, the notch and the cooling cavity, the smoke exhausted by the smoke exhaust pipe can enter the cooling cavity, the smoke can be directly cooled by the circulating cooling water in the cooling cavity, and the particles carried in the smoke can be captured, and the particles can be discharged by the circulating cooling water, so that the temperature of the smoke can be reduced and the smoke pollution to the environment can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of metallurgical machinery, and specifically relates to an electric arc furnace cover and an electric arc furnace. Background Art

[0002] The electric arc furnace is an electric furnace that uses the high temperature generated by the electrode arc to melt ores and metals. When the gas discharge forms an arc, the energy is concentrated, and the temperature in the arc zone is above 3000℃. For melting metal, the electric arc furnace has greater process flexibility than other melting furnaces, can effectively remove impurity elements such as sulfur and phosphorus, the furnace temperature is easy to control, and the equipment occupies a small area, which is suitable for the melting of high-quality alloys.

[0003] In the prior art, a water-cooled furnace cover cools down the exhaust flue gas by water cooling. However, the water used for water cooling is not in direct contact with the flue gas, resulting in low heat loss of the flue gas. In addition, the flue gas duct is straight-through, resulting in a short contact time between the water cooling and the flue gas duct and the flue gas, resulting in low cooling efficiency. Therefore, an electric arc furnace cover and an electric arc furnace are proposed. Utility Model Content

[0004] The utility model aims to provide an electric arc furnace cover and an electric arc furnace to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electric arc furnace cover, comprising a furnace cover body, the interior of the furnace cover body being a cooling cavity, a smoke exhaust pipe being installed on the furnace cover body, the smoke exhaust pipe being connected to the cooling cavity, and the smoke exhausted by the smoke exhaust pipe being filtered through cooling water in the cooling cavity, and being discharged through an air duct installed at the upper end of the furnace cover body and connected to the cooling cavity.

[0006] Preferably, a limiting ring for guiding the smoke is installed at the inner upper end of the cooling chamber, and the limiting ring is sleeved on the smoke exhaust pipe. The upper end of the smoke exhaust pipe is connected to the inner upper end of the cooling chamber, and a notch is provided at the upper end of the smoke exhaust pipe for the flow of smoke. A smoke channel is formed between the limiting ring and the bottom of the cooling chamber, so that the smoke enters between the limiting ring and the cooling chamber through the smoke channel and is discharged through the air guide pipe.

[0007] Preferably, a water inlet pipe is installed at the upper end of the outer side wall of the furnace cover body, and a drain pipe is installed at the lower end of the outer side wall of the furnace cover body, and cooling water enters the cooling cavity through the water inlet pipe and overflows the smoke channel.

[0008] Preferably, an extension plate is provided at the bottom of the limiting ring corresponding to the drain pipe, baffles are provided on both sides of the limiting ring and the cooling chamber corresponding to the drain pipe, and there is a gap between the baffle and the bottom of the cooling chamber.

[0009] An electric arc furnace comprises an electric arc furnace body and an electric arc furnace cover, wherein the electric arc furnace cover is arranged at the upper end opening of the electric arc furnace body.

[0010] Compared with the prior art, the beneficial effects of the utility model are: an arc furnace cover, through the coordinated use of the set limit ring, the notch and the cooling chamber, can allow the smoke discharged from the smoke exhaust pipe to enter the cooling chamber, so that the smoke is directly cooled by the circulating cooling water in the cooling chamber, and can capture particles carried in the smoke and discharge them through the circulating cooling water, which can not only reduce the temperature of the smoke but also avoid the smoke from polluting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0012] Figure 2 This is a longitudinal sectional view of the furnace cover body structure of the utility model;

[0013] Figure 3 It is a transverse cross-sectional view of the furnace cover body structure of the utility model.

[0014] In the figure: 1-furnace cover body, 2-cooling chamber, 3-smoke exhaust pipe, 4-air guide pipe, 5-limiting ring, 6-notch, 7-smoke channel, 8-water inlet pipe, 9-drain pipe, 10-extension plate, 11-baffle, 12-arc furnace body. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1-3 The utility model provides a technical solution: an electric arc furnace, comprising an electric arc furnace body 12 and an electric arc furnace cover, and the electric arc furnace cover is arranged at the upper end opening of the electric arc furnace body 12, and the lower end of the smoke exhaust pipe is connected to the electric arc furnace body 12, the electric arc furnace cover comprises a furnace cover body 1, the interior of the furnace cover body 1 is a cooling cavity 2, a smoke exhaust pipe 3 is installed on the furnace cover body 1, the smoke exhaust pipe 3 is connected to the cooling cavity 2, and the smoke exhausted by the smoke exhaust pipe 3 is filtered by the cooling water in the cooling cavity 2, and is discharged through the air guide pipe 4 installed on the upper end of the furnace cover body 1 and connected to the cooling cavity 2.

[0017] A limiting ring 5 for guiding the smoke is installed at the inner upper end of the cooling chamber 2, and the limiting ring 5 is sleeved on the smoke exhaust pipe 3. The upper end of the smoke exhaust pipe 3 is connected to the inner upper end of the cooling chamber 2. A notch 6 is opened at the upper end of the smoke exhaust pipe 3 for the flow of smoke. A smoke channel 7 is formed between the limiting ring 5 and the bottom of the cooling chamber 2, so that the smoke enters between the limiting ring 5 and the cooling chamber 2 through the smoke channel 7 and is discharged through the air guide pipe 4.

[0018] A fan is installed on the air duct 4 to increase the flow rate of the gas therein.

[0019] The amount of cooling water in the cooling chamber 2 is higher than the bottom of the limiting ring 5 , so that the smoke reaches between the limiting ring 5 and the cooling chamber 2 through the cooling water, and then is discharged through the air guide pipe 4 .

[0020] A water inlet pipe 8 is installed at the upper end of the outer wall of the furnace cover body 1 , and a drain pipe 9 is installed at the lower end of the outer wall of the furnace cover body 1 . Cooling water enters the cooling cavity 2 through the water inlet pipe 8 and overflows the smoke channel 7 .

[0021] The water inlet pipe 8 and the drain pipe 9 form a height difference.

[0022] The outside of the drain pipe 9 is connected to a filtering device for filtering particles in the cooling water.

[0023] An extension plate 10 is provided at the bottom of the limiting ring 5 corresponding to the drain pipe 9, and baffles 11 are provided on both sides of the drain pipe 9 between the limiting ring 5 and the cooling chamber 2, and there is a gap between the baffle 11 and the bottom of the cooling chamber 2, which can suppress the discharge of smoke from the drain pipe 9.

[0024] A mounting tube for electrode mounting is installed on the furnace cover body 1 . The mounting tube is distributed between the limiting ring 5 and the smoke exhaust pipe 3 , and the end of the mounting tube extends to the outside of the furnace cover body 1 .

[0025] Working principle: When the utility model is used, cooling water is introduced into the cooling chamber 2 through the air inlet pipe 8, and the smoke channel 7 is immersed in the cooling water. The arc furnace body 12 is cooled by the cooling water. When the smoke in the arc furnace body 12 is discharged from the smoke exhaust pipe 3, the smoke enters the cooling chamber 2 from the gap 6, and then the smoke enters the space between the limit ring 5 and the cooling chamber 2 through the smoke channel 7. The particles carried in the smoke are adsorbed by the cooling water, and the circulating cooling water is discharged from the drain pipe 9. The cooling water cools the smoke exhaust pipe 3 and the smoke, and the cooled smoke reaches the upper end and is discharged from the air guide pipe 4.

[0026] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An electric arc furnace cover, characterized in that: The invention comprises a furnace cover body (1), the interior of the furnace cover body (1) being a cooling cavity (2), a smoke exhaust pipe (3) being installed on the furnace cover body (1), the smoke exhaust pipe (3) being connected to the cooling cavity (2), and smoke exhausted from the smoke exhaust pipe (3) being filtered by cooling water in the cooling cavity (2), and being discharged through an air guide pipe (4) installed at the upper end of the furnace cover body (1) and connected to the cooling cavity (2).

2. The electric arc furnace cover according to claim 1, characterized in that: A limiting ring (5) for guiding the smoke is installed at the upper end of the interior of the cooling chamber (2), and the limiting ring (5) is sleeved on the smoke exhaust pipe (3). The upper end of the smoke exhaust pipe (3) is connected to the upper end of the interior of the cooling chamber (2), and a notch (6) is provided at the upper end of the smoke exhaust pipe (3) for the flow of smoke. A smoke channel (7) is formed between the limiting ring (5) and the bottom of the cooling chamber (2), so that the smoke enters between the limiting ring (5) and the cooling chamber (2) through the smoke channel (7) and is discharged through the air guide pipe (4).

3. The electric arc furnace cover according to claim 1, characterized in that: A water inlet pipe (8) is installed at the upper end of the outer wall of the furnace cover body (1), and a drain pipe (9) is installed at the lower end of the outer wall of the furnace cover body (1). Cooling water enters the cooling cavity (2) through the water inlet pipe (8) and overflows the smoke channel (7).

4. The electric arc furnace cover according to claim 2, characterized in that: An extension plate (10) is provided at the bottom of the limiting ring (5) corresponding to the drain pipe (9), and baffles (11) are provided on both sides of the limiting ring (5) and the cooling chamber (2) corresponding to the drain pipe (9), and a gap is provided between the baffles (11) and the bottom of the cooling chamber (2).

5. An electric arc furnace, characterized in that: It comprises an arc furnace body and the arc furnace cover according to any one of claims 1 to 4, and the arc furnace cover is arranged at the upper end opening of the arc furnace body.

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