Spray gun for Ausmelt furnace

Abstract

A spray gun for an Ausmelt furnace comprises a fuel coal pipe, an oxygen pipe, a spray gun air pipe and a sleeve air pipe, the fuel coal pipe, the oxygen pipe, the spray gun air pipe and the sleeve air pipe are sequentially and concentrically connected in a sleeved mode from inside to outside, spiral sliding grooves are annularly formed in the outer walls of outlets of the fuel coal pipe and the oxygen pipe correspondingly, and blades are slidably connected into the corresponding sliding grooves. A locking assembly used for preventing the blades from falling off is fixedly connected to the outer side of the inlet of the sliding groove. By replacing the angle and the installation mode of the swirl vane, a series of problems caused by the angle and the installation mode of the swirl vane are fundamentally solved, the labor intensity of operators is greatly relieved, meanwhile, the working procedures are simplified, the life and property safety of the operators is guaranteed, and the working efficiency is improved. Meanwhile, fuel coal, air and oxygen are fully mixed, the loss of the fuel coal is reduced, unnecessary economic expenditure of enterprises is reduced, meanwhile, the stirring strength is improved, and the service life of the spray gun is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of metallurgical equipment, and particularly relates to a lance for an Ausmelt furnace. Background Art

[0002] The Ausmelt furnace is one of the representative furnace types of oxygen top-blown submerged bath smelting. It is a lance top-blown bath smelting technology developed on the basis of high-temperature submerged combustion method.

[0003] The lance is the core of Ausmelt technology. During smelting, air, oxygen, and fuel required are blown into the bath through the lance, and a series of physical and chemical reactions occur with the materials in the furnace under the action of strong stirring to complete the heat and mass transfer process. Among them, spiral-wound swirl vanes are arranged inside the lance head. These swirl vanes can guide the air to be sprayed into the furnace in a swirling manner. This kind of swirl vane increases the air flow velocity at the lance wall, thereby increasing the heat transfer speed between the lance and the air, enhancing the heat exchange amount, and reducing the wall temperature of the lance pipe.

[0004] The existing swirl vanes are usually welded inside the lance. In this case, during maintenance, if the swirl vanes need to be replaced, these swirl vanes need to be cut off by artificial using a cutting machine for repair. After the repair is completed, these swirl vanes are welded on. When welding, the distance between the swirl vanes needs to be ensured, and the perpendicularity with the welding pipe also needs to be ensured. The process is very cumbersome, which also increases the labor intensity of the operators. At the same time, there may be a situation of hurting people during cutting. At the same time, the rotation angle of the existing swirl vanes is usually 50°, and in this case, the fuel coal, air, and oxygen in the furnace cannot be fully mixed, so the fuel cannot be fully burned at the lance tip. This will directly increase the loss of fuel coal, increase the economic expenditure of the enterprise. At the same time, the swirling ejected gas cannot be fully dispersed in the slag bath, resulting in a lower stirring intensity of the bath, easily causing the temperature of the outer wall of the lance to rise and leading to the burning damage of the lance, affecting the service life of the lance. Content of the Utility Model

[0005] In order to solve the above existing problems, the utility model provides a lance for an Ausmelt furnace.

[0006] The utility model is realized through the following technical solutions:

[0007] A lance for an Ausmelt furnace includes a fuel coal pipe, an oxygen pipe, a lance air pipe, and a sleeve air pipe that are concentrically sleeved from the inside out in sequence. Corresponding to the outer walls of the outlets of the fuel coal pipe and the oxygen pipe, spiral upward chutes are respectively annularly opened. Corresponding to the chutes, vanes are slidably connected. Outside the entrance of the chute, a locking assembly is fixedly connected for preventing the vanes from falling off.

[0008] Further optionally, the spiral angle of the chute is 50 degrees - 60 degrees.

[0009] Further optionally, the cross-section of the chute is arranged in an inverted "T" shape.

[0010] Further optionally, an inverted "T" shaped sliding table matching the chute is arranged at the lower part of the blade.

[0011] Further optionally, the locking assembly includes external thread rings respectively connected and fixed on the outer sides of the outlets of the corresponding fuel coal pipe and oxygen pipe, and locking nuts are arranged on the external thread rings in a threaded connection manner.

[0012] Further optionally, the center distance between the corresponding external thread ring and the corresponding fuel coal pipe and oxygen pipe is smaller than the center distance between the chute and the corresponding fuel coal pipe and oxygen pipe.

[0013] Compared with the existing technology, the beneficial effects of the present utility model are as follows: By replacing the angle and installation method of the swirl vane, a series of problems caused by the angle and installation method of the swirl vane are fundamentally solved, greatly reducing the labor intensity of the operators. At the same time, the process is simplified, and the life and property safety of the operators are ensured. Meanwhile, the fuel coal, air and oxygen are fully mixed, reducing the loss of fuel coal, reducing unnecessary economic expenditures of the enterprise, and at the same time increasing the agitation intensity and prolonging the service life of the spray gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a partial sectional schematic diagram of the present utility model;

[0016] Figure 3 is Figure 2 a partial enlarged schematic diagram;

[0017] Figure 4 is a cross-sectional view of the swirl vane;

[0018] In the figure: spray gun body 1, fuel coal inlet 2, oxygen inlet 3, spray gun air inlet 4, sleeve air inlet 5, sleeve air pipe 6, spray gun air pipe 7, oxygen pipe 8, fuel coal pipe 9, swirl vane 10, chute 11, external thread ring 12, locking nut 13, sliding table 101. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments:

[0020] As Figure 2 , 3As shown in the figure, a lance for an Ausmelt furnace includes a fuel coal pipe 9, an oxygen pipe 8, a lance air pipe 7, and a sleeve air pipe 6 that are concentrically sleeved from the inside out in sequence. It is characterized in that: on the outer walls at the outlets of the fuel coal pipe 9 and the oxygen pipe 8 respectively, 4 spiral upward chutes 11 are annularly arranged. The spiral angle of the chutes 11 is 50 degrees - 60 degrees. A swirl vane 10 is slidably connected to the corresponding chute 11. A locking component is fixedly connected to the outside of the inlet of the chute 11 to prevent the swirl vane 10 from falling off.

[0021] As Figure 3 shown, the cross-section of the chute 11 is arranged in an inverted "T" shape.

[0022] As Figure 4 shown, a downward "T" - shaped sliding table 101 that matches the chute 11 is arranged at the lower part of the swirl vane 10.

[0023] As Figure 3 shown, the locking component includes an external thread ring 12 that is respectively fixedly connected to the outside of the outlets of the corresponding fuel coal pipe 9 and oxygen pipe 8. A locking nut 13 is arranged on the external thread ring 12 in a threaded connection.

[0024] As Figure 3 shown, the center distance between the external thread ring 12 and the corresponding fuel coal pipe 9 and oxygen pipe 8 is less than the center distance between the chute 11 and the corresponding fuel coal pipe 9 and oxygen pipe 8.

[0025] The implementation principle of the lance for an Ausmelt furnace in an embodiment of the present application is as follows:

[0026] Before the lance body 1 is used, first install the swirl vane 10 into the chute 11 on the outer walls of the corresponding fuel coal pipe 9 and oxygen pipe 8. After the installation is completed, then install the locking nut 13 on the external thread ring 12 integrally arranged on the corresponding fuel coal pipe 9 and oxygen pipe 8, and at the same time tighten the locking nut 13 to prevent loosening and falling off, thereby preventing the swirl vane 10 from shaking during use. After the installation is completed, it is ready for use;

[0027] When the lance body 1 is in use, when the air in the lance air pipe 7 and the oxygen in the oxygen pipe 8 pass through the swirl vane 10 in the corresponding pipe, the air flow will rotate to form a swirl. After the swirl is formed, the fuel coal in the fuel coal pipe 9 will be fully burned. At the same time, after the angle of the swirl vane 10 changes, the gas ejected through the swirl vane 10 will be dispersed in the slag pool, while increasing the air flow rate, enhancing the heat exchange amount, effectively reducing the wall temperature of the lance pipeline, ensuring that the lance is not burned out, prolonging the service efficiency, reducing the loss of fuel coal, and saving costs.

[0028] The basic principles, main features and advantages of the present utility model have been shown and described above. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and all these changes and improvements fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. An Ausmelt furnace spray gun, comprising a fuel coal pipe (9) and an oxygen pipe (8) and a spray gun air duct (7) and a sleeve air duct (6) which are concentrically sleeved in sequence from the inside to the outside, characterized in that: A plurality of spirally ascending chutes (11) are respectively provided on the outer walls of the fuel coal pipe (9) and the oxygen pipe (8), and swirl blades (10) are inserted into the chutes (11). A locking assembly for preventing the swirl blades (10) from falling is connected and fixed to the outer side of the entrance of the chutes (11).

2. The spray gun for an Ausmelt furnace according to claim 1, characterized in that: The spiral angle of the slide groove (11) is 50 degrees to 60 degrees.

3. The spray gun for an Ausmelt furnace according to claim 2, characterized in that: The cross section of the slide groove (11) is in an inverted "T" shape.

4. The spray gun for an Ausmelt furnace according to claim 1, characterized in that: An inverted "T"-shaped slide table (101) matching the slide groove (11) is integrally provided at the lower part of the swirl blade (10).

5. The spray gun for an Ausmelt furnace according to claim 1, characterized in that: The locking assembly comprises an external threaded ring (12) respectively connected and fixed to the outer side of the outlet of the corresponding fuel coal pipe (9) and oxygen pipe (8), and a threaded locking nut (13) is arranged on the external threaded ring (12).

6. The spray gun for an Ausmelt furnace according to claim 5, characterized in that: The center distance between the corresponding external threaded ring (12) and the corresponding fuel coal pipe (9) and oxygen pipe (8) is smaller than the center distance between the slide groove (11) and the corresponding fuel coal pipe (9) and oxygen pipe (8).

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