Fettling gun for electric arc furnace

Abstract

The utility model discloses a fettling gun for an electric arc furnace, which comprises a long pipe, a short pipe and a thin pipe, the outer wall of one side of the long pipe is provided with an inclined through hole for installing the short pipe, the outer wall of the other side of the long pipe is provided with a vertical through hole for installing the thin pipe, and the inclined direction of the short pipe faces the end part of the long pipe on the short pipe side; a port of the long pipe close to the thin pipe side is a feed port, a port of the thin pipe is a water inlet, and a port of the short pipe and a port of the long pipe close to the short pipe side are gunning material outlets. Powder such as magnesia and an adhesive is pushed into the gun barrel by using compressed air and is uniformly mixed with water on the way to form a gunning material, and then the gunning material is sprayed onto a furnace wall and a furnace lining through the gun head and is rapidly sintered at the furnace temperature to repair a damaged part; the fettling gun is easy to use and operate, convenient to maintain, good in gunning effect, high in fettling efficiency and capable of effectively prolonging the service life of the furnace wall of the electric arc furnace and meeting the continuous steelmaking requirement of the electric arc furnace.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical components, and particularly relates to a furnace repairing lance for an electric arc furnace. Background Technique

[0002] When continuously steelmaking with an electric arc furnace, the furnace lining in some areas of the furnace chamber is eroded relatively quickly, and generally, hot furnace repair is required. That is, after the previous furnace has tapped steel, the damaged part of the furnace wall of the furnace body needs to be repaired quickly to ensure the normal smelting of the next furnace of steel.

[0003] The Chinese utility model patent (application number: 201020541393.4) discloses a furnace repair device for an alternating current electric arc furnace, belonging to the technical field of furnace repair devices in the metallurgical industry. The technical solution includes a furnace repair tank rack (1), a tank body (2), a feeding pipe (3), a cone valve (4), a cone valve guide rod (5), and a hydraulic cylinder (6). The tank body is arranged on the furnace repair tank rack. The lower end of the tank body is provided with a feeding pipe, the feeding pipe is matched with the cone valve, and the cone valve is connected to the hydraulic cylinder through the cone valve guide rod. Using the utility model for furnace repair can shorten the furnace repair time when observing the furnace bottom of the electric arc furnace, realize the fixed-point and quantitative supply of furnace repair materials, reduce the waste of furnace repair materials, and improve economic benefits. However, the structure is complex, and only single direct repair can be achieved, and the gunning effect is not good. Summary of the Invention

[0004] The purpose of the utility model is to solve the above technical problems and provide a furnace repairing lance for an electric arc furnace with simple operation and high furnace repair efficiency.

[0005] To achieve the above purpose, the utility model provides a furnace repairing lance for an electric arc furnace, which includes a long pipe, a short pipe, and a thin pipe. An inclined through hole for installing the short pipe is formed on the outer wall of one side of the long pipe, and a vertical through hole for installing the thin pipe is formed on the outer wall of the other side of the long pipe. The inclined direction of the short pipe faces the end of the long pipe on the short pipe side; the port of the long pipe close to the thin pipe side is the feed port, the port of the thin pipe is the water inlet, and the port of the short pipe and the port of the long pipe close to the short pipe side are the gunning material outlets.

[0006] Further, the gunning material outlet of the short pipe is sealed and tightened with a first threaded plug. When the gunning material exits from the gunning material outlet of the long pipe close to the short pipe side, it is direct repair; the gunning material outlet of the long pipe close to the short pipe side is sealed and tightened with a second threaded plug. When the gunning material exits from the gunning material outlet of the short pipe, it is side repair; when the gunning material outlets of the furnace repairing lance are not blocked, and the gunning material exits from both the gunning material outlet of the short pipe and the gunning material outlet of the long pipe, it is both direct repair and side repair at the same time.

[0007] Further, the included angle between the long pipe and the short pipe is 30° - 60°.

[0008] Further, there are external threads on both ends of the long pipe, external threads at the end of the short pipe, and external threads at the end of the thin pipe.

[0009] Furthermore, the outer shapes of the first threaded plug and the second threaded plug are both square.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: The repairing lance for electric arc furnace of the utility model is simple to operate and convenient to maintain, has good gunning effect and high repairing efficiency, can effectively improve the service life of the furnace wall of the electric arc furnace, and meets the requirements of continuous steelmaking of the electric arc furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic structural diagram of the repairing lance for electric arc furnace of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0012] The following further describes the utility model with reference to the drawings and specific embodiments.

[0013] As Figure 1 For the repairing lance for electric arc furnace, it includes a long tube 1, a short tube 3 and a thin tube 5. Among them, an inclined through hole 2 for installing the short tube 3 is opened on the outer wall of one side of the long tube 1, and a vertical through hole 4 for installing the thin tube 5 is opened on the outer wall of the other side of the long tube 1. The included angle between the long tube 1 and the short tube 3 is 30° - 60°, and the inclined direction of the short tube 3 faces the end of the long tube 1 on the short tube side. The port of the long tube 1 near the thin tube side is the feed port 8 for compressed air and powder, the port of the thin tube 5 is the water inlet 9, and the ports of the short tube 3 and the long tube 1 near the short tube side are the gunning material outlets 10.

[0014] There are external threads on both ends of the long tube 1, an external thread at the end of the short tube 3, and an external thread at the end of the thin tube 5. During direct repair, the gunning material outlet 10 of the short tube 3 is sealed and tightened with a first threaded plug 6, and only the gunning material outlet 10 of the long tube 1 near the short tube 3 discharges the gunning material; during side repair, the gunning material outlet 10 of the long tube 1 near the short tube 3 is sealed and tightened with a second threaded plug 7, and only the gunning material outlet 10 of the short tube 3 discharges the gunning material; during simultaneous direct repair and side repair, the gun head of the repairing lance is not blocked, and both the gunning material outlet 10 of the short tube 3 and the gunning material outlet 10 of the long tube 1 discharge the gunning material. In this embodiment, the outer shapes of the first threaded plug 6 and the second threaded plug 7 are both square, which is convenient for disassembly with a pipe wrench.

[0015] Using compressed air to push powders such as magnesite and binder into the gun barrel, and evenly mix with water on the way to form a gunning material, and then spray it onto the furnace wall lining through the gun head, and quickly sinter at the furnace temperature to repair the damaged part; this repairing lance is simple to operate and convenient to maintain, has good gunning effect and high repairing efficiency, can effectively improve the service life of the furnace wall of the electric arc furnace, and meets the requirements of continuous steelmaking of the electric arc furnace.

Claims

1. A repairing lance for an electric arc furnace, characterized in that: It includes a long tube (1), a short tube (3) and a thin tube (5). An inclined through hole (2) for installing the short tube (3) is formed on the outer wall of one side of the long tube (1), and a vertical through hole (4) for installing the thin tube (5) is formed on the outer wall of the other side of the long tube (1). The inclined direction of the short tube (3) faces the end of the long tube (1) on the short tube side; the port of the long tube (1) near the thin tube side is the feed port (8), the port of the thin tube (5) is the water inlet (9), and the ports of the short tube (3) and the port of the long tube (1) near the short tube (3) are the gunning material outlets (10).

2. The ladle repair lance for an electric arc furnace according to claim 1, characterized in that: The gunning material outlet (10) of the short tube (3) is sealed and tightened with a first threaded plug (6), and the gunning material ejected from the gunning material outlet (10) of the long tube (1) near the short tube (3) is straight gunning; the gunning material outlet (10) of the long tube (1) near the short tube (3) is sealed and tightened with a second threaded plug (7), and the gunning material ejected from the gunning material outlet (10) of the short tube (3) is side gunning; when the gunning lance does not block the gunning material outlet (10), the gunning material ejected from the gunning material outlets (10) of both the short tube (3) and the long tube (1) is both straight gunning and side gunning at the same time.

3. The ladle repair lance for electric arc furnace according to claim 1, characterized in that: The included angle between the long tube (1) and the short tube (3) is 30° to 60°.

4. The patching lance for electric arc furnace according to claim 1, characterized in that: Both ends of the long tube (1) have external long tube threads, the end of the short tube (3) has external short tube threads, and the end of the thin tube (5) has external thin tube threads.

5. The repairing lance for electric arc furnace according to claim 2, characterized in that: The outer shapes of the first threaded plug (6) and the second threaded plug (7) are both square.

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