Special oxygen lance for treating accumulated slag at furnace mouth of vanadium extraction converter

Abstract

A special oxygen lance for treating accumulated slag at a furnace mouth of a vanadium extraction converter relates to the field of oxygen lances, and comprises an oxygen pipe, a marine riser, a nozzle outer pipe and a spray hole, the marine riser is positioned between the oxygen pipe and the nozzle outer pipe, the spray hole extends from the lower end of the oxygen pipe to the lower end of the nozzle outer pipe, the spray hole is formed into a contraction-expansion shape with a throat part, and the nozzle outer pipe is provided with a nozzle opening. The number of the spraying holes is four, an included angle alpha is formed between the center line of each spraying hole and the center line of the oxygen pipe, the included angle alpha is 14 degrees, the diameter of an outlet of each spraying hole is 43.5 mm, the Mach number M of each spraying hole is 2.0, and the pipe diameter of each spraying hole is phi 219 * 180 * 133. And the diameter of the throat part is 33.6 mm. According to the special oxygen lance for treating the accumulated slag at the furnace mouth of the vanadium extraction converter, the included angle of the throat of the oxygen lance is adjusted to be 14 degrees, the blowing area in the horizontal direction is increased, and the accumulated slag at the furnace mouth can be quickly treated; the oxygen lance is provided with four holes instead of three holes, so that the blowing area of oxygen jet flow is further uniformized, and meanwhile, the cleaning speed of accumulated slag at the furnace mouth is increased.

Description

Technical field:

[0001] The utility model relates to the field of oxygen lances, in particular to a special oxygen lance for treating slag accumulation at a furnace mouth of a vanadium-extracting converter. Background technology:

[0002] During the vanadium extraction process, the vanadium slag is in a viscous state. During the smelting process, the slag and metal liquid will splash outward quickly with the airflow generated in the furnace, resulting in serious slag accumulation at the furnace mouth. As the slag accumulation in the furnace increases, the progress of adding molten iron and scrap steel to the vanadium extraction converter is seriously hindered. In worse cases, the converter will show a top-heavy phenomenon, resulting in an imbalance in the converter operation process and serious production accidents. At present, the existing 3-hole vanadium extraction oxygen gun is mainly used to treat the slag accumulation at the furnace mouth, but the slag accumulation treatment speed is slow, and the oxygen jet is easy to burn through the furnace mouth or smoke hood, causing production accidents. Utility model content:

[0003] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and to provide a special oxygen lance for treating slag accumulation at the furnace mouth of a vanadium extracting converter. The utility model can quickly complete the task of purging the furnace mouth, saving 1.5-2.0 minutes each time, while reducing the erosion of the smoke hood during the purging process, which is beneficial to protecting production equipment.

[0004] In order to solve the problems existing in the background technology, the utility model adopts the following technical scheme: it includes an oxygen pipe, a watertight pipe, a nozzle outer tube and a spray hole, the watertight pipe is located between the oxygen pipe and the nozzle outer tube, the spray hole extends from the lower end of the oxygen pipe to the lower end of the nozzle outer tube, the spray hole is formed into a contraction-expansion shape with a throat portion, the number of the spray holes is four, the center line of the spray hole forms an angle α with the center line of the oxygen pipe, the angle α is 14°, the diameter at the outlet of the spray hole is 43.5 mm, the Mach number M of the spray hole is 2.0, the tube diameter of the spray hole is φ219*180*133; the diameter of the throat portion is 33.6 mm.

[0005] The beneficial effects of the utility model are simple structure and easy use:

[0006] 1) Adjust the throat angle of the oxygen lance to 14° (10° for vanadium extraction oxygen lance) to increase the horizontal purge area, which is conducive to the rapid treatment of slag accumulation at the furnace mouth;

[0007] 2) The oxygen lance is adjusted from three holes to four holes to further even out the oxygen jet sweeping area and accelerate the cleaning speed of the slag at the furnace mouth;

[0008] 3) Establish an operating system for handling slag accumulation at the furnace mouth and determine reasonable gun position, oxygen pressure and parameters. Description of the drawings:

[0009] Figure 1 It is a schematic diagram of the structure of the utility model;

[0010] Figure 2 It is a cross-sectional view of the utility model. Specific implementation method:

[0011] With reference to the figures, the utility model specifically adopts the following implementation mode: it includes an oxygen pipe 1, a watertight pipe 2, a nozzle outer pipe 3 and a spray hole 4, the watertight pipe 2 is located between the oxygen pipe 1 and the nozzle outer pipe 3, the spray hole 4 extends from the lower end of the oxygen pipe 1 to the lower end of the nozzle outer pipe 3, the spray hole 4 is formed into a contraction-expansion shape with a throat portion 5, and is characterized in that: the number of the spray holes 4 is four, the center line of the spray hole 4 forms an angle α with the center line of the oxygen pipe 1, the angle α is 14°, the diameter at the outlet of the spray hole 4 is 43.5 mm, the Mach number M of the spray hole 4 is 2.0, the tube diameter of the spray hole 4 is φ219*180*133; the diameter of the throat portion 5 is 33.6 mm.

[0012] The parameters of the three-hole oxygen lance currently used are: angle α is 10°, Mach number M2.0, tube diameter φ219*180*133, throat diameter 28.7mm, outlet diameter 37mm. Second, the special oxygen lance for treating slag at the furnace mouth of the vanadium-extracting converter is changed to a four-hole one, and the parameters of the 4-hole oxygen lance nozzle are as follows: α is 14° angle, Mach number M2.0, tube diameter φ219*180*133, throat diameter 33.6mm, outlet diameter 43.5mm. Adjusting the throat angle of the oxygen lance to 14° (10° for the vanadium-extracting oxygen lance) increases the horizontal purge area, which is conducive to the rapid treatment of slag at the furnace mouth; the oxygen lance is adjusted from three holes to four holes to further even out the oxygen jet purge area and accelerate the cleaning speed of slag at the furnace mouth.

[0013] In summary, the special oxygen lance for treating slag at the furnace mouth of the vanadium-extracting converter has a simple structure and is easy to use. The throat angle of the oxygen lance is adjusted to 14° (10° for the vanadium-extracting oxygen lance) to increase the horizontal purge area, which is conducive to the rapid treatment of slag at the furnace mouth. The oxygen lance is adjusted from three holes to four holes to further even out the oxygen jet purge area and accelerate the cleaning speed of the slag at the furnace mouth. An operating system for treating slag at the furnace mouth is formulated to determine reasonable lance positions, oxygen pressures and parameters.

Claims

1. A special oxygen lance for treating slag accumulation at the furnace mouth of a vanadium-extracting converter, comprising an oxygen pipe (1), a water-rising pipe (2), a nozzle outer pipe (3) and a spray hole (4), wherein the water-rising pipe (2) is located between the oxygen pipe (1) and the nozzle outer pipe (3), and the spray hole (4) extends from the lower end of the oxygen pipe (1) to the lower end of the nozzle outer pipe (3), and the spray hole (4) is formed into a contraction-expansion shape with a throat portion (5), characterized in that: The number of the spray holes (4) is four, the center line of the spray hole (4) forms an angle α with the center line of the oxygen tube (1), the angle α is 14°, the diameter of the spray hole (4) at the outlet is 43.5 mm, the Mach number M of the spray hole (4) is 2.0, and the diameter of the spray hole (4) is φ219*180*133; the diameter of the throat portion (5) is 33.6 mm.

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