Heat preservation overflow device for slag discharge

Abstract

The utility model provides a heat preservation overflow device for slag discharge, which comprises an overflow port water jacket arranged on an overflow port, an overflow port chute is connected below the overflow port water jacket, the overflow port chute is formed by connecting a straight section chute, a three-way chute, a left bent chute and a right bent chute through flanges, the overall inclination angle of the overflow port chute is 10-15 degrees, and the three-way chute is connected with the overflow port water jacket. A natural gas heat preservation spray gun is erected above the overflow port chute, and an arch-shaped heat preservation cover plate covers the overflow port chute. The bidirectional switchable discharge of the slag is realized through the three-way chute, and the slag bonding is effectively prevented by matching with the heating of the double-channel natural gas spray gun and the chute heat-insulating cover plate. The overflow port chute is designed to be inclined by 10-15 degrees, and is combined with a water-cooled overflow port water jacket and a refractory material lining, so that the problem of blockage caused by cooling of a traditional chute is solved, and the production continuity and stability are remarkably improved.

Description

Technical Field

[0001] This utility model relates to slag discharge technology for metallurgical furnaces and kilns, specifically to a heat-insulating overflow device suitable for slag discharge. Background Technology

[0002] Smelting slag cools down extremely rapidly during discharge. Traditional slag discharge chutes lack insulation, causing the slag to rapidly cool and adhere, requiring frequent shutdowns for cleaning and impacting production efficiency. Current technologies, such as unidirectional chutes, cannot switch discharge directions, and their heating methods are energy-intensive and ineffective. Without insulation after discharge from the furnace, slag easily adheres, affecting production organization and necessitating cleaning before resuming operations. Utility Model Content

[0003] The purpose of this utility model is to address the problems existing in the prior art by providing a heat-insulating overflow device for slag discharge, which solves the problem of severe adhesion of slag when discharged into the chute, reduces production and operating costs, and stabilizes the production and operating process.

[0004] Therefore, the present invention adopts the following technical solution:

[0005] A heat-insulating overflow device for slag discharge includes an overflow outlet water jacket installed on the overflow outlet. An overflow outlet chute is connected below the overflow outlet water jacket. The overflow outlet chute is composed of a straight chute, a three-way chute, a left-bend chute, and a right-bend chute connected by flanges. The overall inclination angle of the overflow outlet chute is 10-15°. A natural gas heat-insulating spray gun is installed above the overflow outlet chute. The natural gas heat-insulating spray gun has a dual-channel pipeline structure, with the inner channel spraying oxygen and the outer channel spraying natural gas fuel. An arched heat-insulating cover plate covers the overflow outlet chute.

[0006] When the lower and upper edges of the three-way chute are installed on a 10-15° slope, they should be kept horizontal to prevent slag from spilling out.

[0007] The overflow outlet water jacket is made of embedded pipe cast T2 copper, and the height difference between it and the overflow outlet chute is 500mm.

[0008] The overflow outlet water jacket 5 is fixed to the furnace wall. The arched heat-insulating cover plate has a diameter of 600mm and a width of 500mm, and has handles on both sides.

[0009] The beneficial effects of this utility model are as follows:

[0010] This invention is mainly applied to the slag discharge system of metallurgical furnaces and kilns, changing the chute discharge method and chute insulation method. The overflow port with a three-way chute allows for continuous slag discharge, and the discharge direction can be changed during the discharge process. This makes the production of metallurgical furnaces and kilns more stable and orderly. The three-way chute enables bidirectional switchable slag discharge, and combined with dual-channel natural gas torch heating and chute insulation cover, it effectively prevents slag adhesion. The overflow port chute adopts a 10-15° inclined design, combined with a water-cooled overflow port water jacket and refractory material lining, which solves the clogging problem caused by cooling in traditional chutes, significantly improving the continuity and stability of production. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model;

[0012] In the diagram, 1-straight chute, 2-tee chute, 3-left bend chute, 4-right bend chute, 5-overflow water jacket, 6-natural gas insulation spray gun, 7-furnace wall. Detailed Implementation

[0013] The technical solution of this utility model will be described below with reference to the accompanying drawings and implementation methods.

[0014] like Figure 1 As shown, a heat-insulating overflow device for slag discharge includes an overflow outlet water jacket 5 installed on the overflow outlet, an overflow outlet chute connected below the overflow outlet water jacket 5, the overflow outlet chute includes a straight section chute 1, a three-way chute 2 connected below the straight section chute 1, the three-way chute 2 is connected to a left-bend chute 3 and a right-bend chute 4, and a natural gas heat-insulating spray gun 6 is installed above the overflow outlet chute and covered with an arched heat-insulating cover plate.

[0015] The straight chute 1 and the tee chute 2 are connected by flanges; the left and right sides of the tee chute are respectively the left-bend chute 3 and the right-bend chute 4, all three connected by flanges. The overflow water jacket 5 is fixed to the furnace wall with fixing pins. Refractory material is built inside the overflow water jacket, mainly to fix the furnace wall bricks and prevent them from falling off due to molten material erosion, thus deforming the overflow outlet. The overflow water jacket is made of embedded pipe cast with T2 copper and is a water-cooled device, cooled by cooling water. The natural gas insulation spray gun has a dual-channel pipe structure; the inner channel sprays oxygen, and the outer channel sprays natural gas fuel. The chute insulation cover is arched, with a diameter of 600mm and a width of 500mm, and a handle is installed on each side; it is made of refractory material. The overall angle of the overflow chute is 12°. When the lower and upper edges of the tee chute are installed on the 12° slope, they maintain a horizontal angle to prevent slag from overturning from the lower edge.

[0016] The height difference between the overflow outlet and the overflow chute is 500mm. The overflow outlet is installed directly above the overflow chute. The connection between the overflow chute and the furnace wall is constructed with refractory material to prevent slag from flowing towards the furnace wall and causing it to burn. Above the overflow chute is a chute insulation cover plate, made of refractory fabric reinforced with steel, designed to prevent heat loss from the chute.

[0017] The overflow chute is a three-way chute. During the discharge process, one side is blocked with yellow mud, and discharge is carried out on one side. The discharge direction can be reversed according to the production organization requirements.

[0018] This invention is mainly applied to the slag discharge system of metallurgical furnaces, changing the chute discharge method and chute insulation method. The device with an overflow port and a three-way chute allows for continuous slag discharge, and the discharge direction can be changed during the discharge process. This makes the production of metallurgical furnaces more stable and orderly. During slag discharge, the slag is discharged into the chute through the overflow port water jacket. An arched insulation cover and a natural gas insulation spray gun are installed above the chute. During the slag flow, natural gas heating keeps the slag at a high temperature, reducing adhesion within the chute due to temperature drops.

Claims

1. A heat-insulating overflow device for slag discharge, characterized in that: The system includes an overflow outlet water jacket (5) installed on the overflow outlet, with an overflow outlet chute connected below the overflow outlet water jacket (5). The overflow outlet chute is composed of a straight section chute (1), a three-way chute (2), a left-bend chute (3), and a right-bend chute (4) connected by flanges. The overall tilt angle of the overflow outlet chute is 10-15°. A natural gas heat-insulating spray gun (6) is installed above the overflow outlet chute. The natural gas heat-insulating spray gun (6) has a dual-channel pipeline structure, with the inner channel spraying oxygen and the outer channel spraying natural gas fuel. An arched heat-insulating cover plate covers the top of the overflow outlet chute.

2. The heat-insulating overflow device for slag discharge according to claim 1, characterized in that: The lower and upper edges of the three-way chute (2) are kept horizontal when installed on a 10-15° inclined plane to prevent slag from spilling out.

3. The heat-insulating overflow device for slag discharge according to claim 1, characterized in that: The overflow outlet water jacket (5) is made of buried pipe cast T2 copper, and the height difference between it and the overflow outlet chute is 500mm.

4. The heat-insulating overflow device for slag discharge according to claim 1, characterized in that: The overflow outlet water jacket (5) is fixed to the furnace wall.

5. The heat-insulating overflow device for slag discharge according to claim 1, characterized in that: The arched heat-insulating cover has a diameter of 600mm and a width of 500mm, and has handles on both sides.

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