CN116103465A - Oxygen Lance for Vanadium Extraction Converter - Google Patents

Abstract

The invention discloses an oxygen lance for a vanadium extraction converter, which comprises: an oxygen lance body; the spray head is connected with the oxygen lance body and is provided with a central spray hole and a plurality of peripheral spray holes surrounding the central spray hole; the axis of the central spray hole coincides with the central line of the oxygen lance body, and a preset included angle is formed between the axis of the peripheral spray hole and the central line of the oxygen lance body. The invention can improve the uniformity of stirring of a molten pool during vanadium extraction of the converter.

Description

Oxygen Lance for Vanadium Extraction Converter

technical field

The invention relates to the technical field of vanadium extraction in a converter, in particular to an oxygen lance for a vanadium extraction converter.

Background technique

When vanadium-titanium magnetite is used for smelting, the molten iron smelted from vanadium-titanium magnetite blast furnace has higher vanadium content than ordinary molten iron, and vanadium is an important resource. Therefore, vanadium must be extracted from molten iron before steelmaking. Vanadium slag. In the prior art, there are a variety of vanadium extraction processes including molten iron ladle vanadium blowing process, shaking ladle vanadium extraction process and converter vanadium extraction process, among which converter vanadium extraction has better performance.

In the vanadium extraction process of the converter, it is necessary to use an oxygen lance to blow oxygen at a supersonic speed into the metal molten pool in the converter. However, the existing oxygen lances for vanadium extraction converters usually include three or four spray holes with the same diameter arranged along the circumference, which will cause the outer peripheral part of the molten pool to be fully stirred while the middle part is hardly stirred, resulting in Problems with uneven pool agitation.

Based on this, there is still room for further improvement in the prior art.

Contents of the invention

The main purpose of the present invention is to provide an oxygen lance for a vanadium extraction converter to solve the problem that the existing oxygen lance for a vanadium extraction converter causes uneven stirring of a molten pool.

According to one aspect of the present invention, propose a kind of oxygen lance for extracting vanadium converter, comprise:

Oxygen gun body;

A spray head connected to the oxygen lance gun body, the spray head is provided with a central spray hole and a plurality of peripheral spray holes around the central spray hole;

Wherein, the axis of the central nozzle hole coincides with the centerline of the oxygen lance body, and there is a predetermined angle between the axis of the peripheral nozzle hole and the centerline of the oxygen lance body.

According to an embodiment of the present invention, the plurality of peripheral nozzle holes are evenly arranged along the circumference.

According to an embodiment of the present invention, the number of the peripheral nozzle holes is three.

According to an embodiment of the present invention, the predetermined included angle is 10-14°.

According to an embodiment of the present invention, the throat diameter of the central nozzle hole is 36.4-40.4 mm, and the throat diameter of the peripheral nozzle holes is 31.9-35.9 mm.

According to an embodiment of the present invention, the outlet diameter of the central nozzle hole is 49-53 mm, and the outlet diameter of the peripheral nozzle hole is 42.6-46.6 mm.

According to an embodiment of the present invention, the Mach number of the central nozzle hole is 2.05, and the Mach number of the peripheral nozzle holes is 2.03.

According to an embodiment of the present invention, the oxygen flow rate of the oxygen lance is 20000-24000 Nm ³ _. h ^-1 .

According to an embodiment of the present invention, the working pressure of the oxygen lance is 0.8-0.85 MPa.

In the oxygen lance for the vanadium extraction converter according to the embodiment of the present invention, by setting the central spray hole and a plurality of peripheral spray holes around the central spray hole, the middle part of the molten pool can also be fully stirred, thereby Improve the uniformity of molten pool stirring.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 shows the schematic diagram of the injection hole of the oxygen lance that is used for extracting vanadium converter according to the embodiment of the present invention;

Fig. 2 shows another schematic diagram of the nozzle holes of the oxygen lance used in the vanadium extraction converter according to the embodiment of the present invention.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are to distinguish two entities with the same name but different parameters or parameters that are not the same, see "first" and "second" It is only for the convenience of expression, and should not be construed as a limitation on the embodiments of the present invention, which will not be described one by one in the subsequent embodiments.

The invention provides an oxygen lance for a vanadium extracting converter, comprising: an oxygen lance body; and a nozzle connected with the oxygen lance body. With reference to Fig. 1 and Fig. 2, in the embodiment of the present invention, shower head 10 is provided with central orifice 12 and a plurality of peripheral orifices 14 around central orifice 12; Wherein, the axis of central orifice 12 and oxygen lance body The centerlines of the nozzles are coincident, and there is a predetermined angle α between the axis of the peripheral nozzle hole 14 and the centerline of the oxygen lance body.

In the oxygen lance for vanadium extracting converter according to the embodiment of the present invention, by setting the center nozzle hole 12 and a plurality of peripheral nozzle holes 14 around the center nozzle hole 12, the middle part of the molten pool can also be fully stirred, Thereby improving the uniformity of molten pool stirring.

In some embodiments, a plurality of peripheral orifices 14 are uniformly arranged along the circumference, which further improves the uniformity of molten pool agitation by providing uniformity of the orifices.

In some embodiments, the number of peripheral injection holes 14 is three, and the three peripheral injection holes 14 are enough to sufficiently stir the peripheral area of the molten pool.

In some embodiments, the predetermined included angle α is 10-14°. Such an angle setting can improve the flow direction of the molten pool and ensure that the molten pool is fully stirred.

In some embodiments, the throat diameter of the central nozzle hole 12 is 36.4-40.4 mm, and the throat diameter of the peripheral nozzle hole 14 is 31.9-35.9 mm. In some embodiments, the outlet diameter of the central nozzle hole 12 is 49-53 mm, and the outlet diameter of the peripheral nozzle hole 14 is 42.6-46.6 mm. The diameter of the central spray hole 12 is generally larger than that of the peripheral spray holes 14, so as to enhance the stirring intensity in the middle area of the molten pool, so that the entire molten pool is stirred evenly.

In some embodiments, the central orifice 12 has a Mach number of 2.05 and the peripheral orifices 14 has a Mach number of 2.03. The Mach number of the central nozzle hole 12 is slightly greater than that of the peripheral nozzle holes 14, so as to balance the stirring intensity between the middle area and the peripheral area of the molten pool and ensure the uniformity of the molten pool stirring.

In some embodiments, the oxygen flow rate of the oxygen lance is 20000-24000 Nm ³ _. h ^-1 .

In some embodiments, the working pressure of the oxygen lance is 0.8-0.85 MPa.

Those of ordinary skill in the art should understand that: the discussion of any of the above embodiments is exemplary only, and is not intended to imply that the scope (including claims) disclosed by the embodiments of the present invention is limited to these examples; under the idea of the embodiments of the present invention , technical features in the above embodiments or in different embodiments can also be combined, and there are many other changes in different aspects of the embodiments of the present invention as described above, which are not provided in details for the sake of brevity. Therefore, any omission, modification, equivalent replacement, improvement, etc. made within the spirit and principles of the embodiments of the present invention shall be included within the protection scope of the embodiments of the present invention.

Claims (9)

1. An oxygen lance for a vanadium extraction converter, comprising:

an oxygen lance body;

the spray head is connected with the oxygen lance body and is provided with a central spray hole and a plurality of peripheral spray holes surrounding the central spray hole;

the axis of the central spray hole coincides with the central line of the oxygen lance body, and a preset included angle is formed between the axis of the peripheral spray hole and the central line of the oxygen lance body.

2. The oxygen lance of claim 1 wherein the plurality of peripheral nozzles are circumferentially and uniformly arranged.

3. The oxygen lance of claim 1 wherein the number of peripheral jet holes is three.

4. The oxygen lance of claim 1 wherein the predetermined angle is 10 to 14 °.

5. The oxygen lance of claim 1 wherein the throat diameter of the central nozzle orifice is 36.4 to 40.4mm and the throat diameter of the peripheral nozzle orifice is 31.9 to 35.9mm.

6. The oxygen lance of claim 1 wherein the outlet diameter of the central nozzle orifice is 49-53 mm and the outlet diameter of the peripheral nozzle orifice is 42.6-46.6 mm.

7. The oxygen lance of claim 1 wherein the central nozzle orifice has a mach number of 2.05 and the peripheral nozzle orifice has a mach number of 2.03.

8. The oxygen lance according to claim 1, wherein the oxygen flow rate of the oxygen lance is 20000 to 24000Nm ³ _. h ^-1 。

9. The oxygen lance of claim 1 wherein the operating pressure of the lance is from 0.8 to 0.85MPa.

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