CN219342192U

CN219342192U - Anhydrous oxygen lance for converter

Info

Publication number: CN219342192U
Application number: CN202320563844.1U
Authority: CN
Inventors: 孙本胜
Original assignee: Anshan Zhongke Thermal Technology Co ltd
Current assignee: Anshan Zhongke Thermal Technology Co ltd
Priority date: 2023-03-21
Filing date: 2023-03-21
Publication date: 2023-07-14
Anticipated expiration: 2033-03-21

Abstract

The utility model relates to the technical field of oxygen lances for converters, in particular to an anhydrous oxygen lance for a converter. Comprises a central tube, an outer tube, an air cooling device and a spray head; the outer pipe is sleeved outside the central pipe, and an air cooling air inlet is formed in the outer pipe; the air cooling device is arranged between the central pipe and the outer pipe, and is used for forced air cooling of the outer pipe; the spray head is fixedly connected to the end part of the outer tube. And the anhydrous refrigeration is adopted, so that safety accidents caused by water leakage are avoided, and the energy conservation and emission reduction are realized. Through the arrangement of the forced cooling device and the application of special austenitic stainless steel, the oxygen used for converter steelmaking is utilized to lead the outer tube of the oxygen lance to achieve high-position heat balance. The simple deslagging is realized through the reducing arrangement of the gun body and the nozzle connecting pipe. The laser thermometer probe is fixedly connected at the end of the central pipe, and the rear of the central hole of the spray head is used for detecting the temperature of molten steel in real time, so that the steelmaking process is easier to control, and an optimal data acquisition point is provided.

Description

Anhydrous oxygen lance for converter

Technical Field

The utility model relates to the technical field of oxygen lances for converters, in particular to an anhydrous oxygen lance for a converter.

Background

The oxygen lance is a tubular device which blows high-pressure high-purity oxygen above a molten metal bath in a converter at a supersonic speed and is provided with a high-pressure water cooling protection system. The oxygen lance is one of the main process equipment in the steelmaking of the oxygen converter, and the performance characteristics of the oxygen lance directly affect the smelting effect and the converting time, thereby affecting the quality and the yield of steel.

At present, all oxygen guns of the converter are water-cooled oxygen guns, and a water jacket is arranged outside an oxygen pipe to cool the oxygen guns, so that the purpose of protecting the oxygen pipe and a spray head is achieved, and steel-making operation is completed.

The existing converter oxygen lance has at least the following defects: when the oxygen lance is inserted into the converter, water leakage accidents occur, equipment is damaged due to solidification of light molten steel, and a large number of personnel are dead and wounded on site due to spray explosion of the converter; the existing converter oxygen lance adopts water cooling, so that a large amount of water resources are consumed, a large amount of electric energy is consumed by matched equipment, and meanwhile, part of heat energy is taken away, so that energy waste is caused; the cooling water discharge increases the cost of environmental remediation.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides an anhydrous oxygen lance for a converter. And the anhydrous refrigeration is adopted, so that safety accidents caused by water leakage are avoided, and the energy conservation and emission reduction are realized.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

an anhydrous oxygen lance for a converter comprises a central tube, an outer tube, an air cooling device and a spray head; the outer tube is sleeved outside the central tube, and is provided with a wind-cold air (oxygen) inlet; the air cooling device is arranged between the central pipe and the outer pipe, and is used for forced air cooling of the outer pipe; the spray head is fixedly connected to the end part of the outer tube.

As a further improvement of the utility model: the probe of the temperature measuring instrument is fixedly connected to the end part of the central tube and is positioned at the spray head, and the central tube is provided with an instrument cooling gas inlet; and the temperature measuring instrument monitors the temperature of the molten pool in real time.

As a further improvement of the utility model: the temperature measuring instrument is a laser temperature measuring instrument.

As a further improvement of the utility model: the outer tube adopts the reducing setting, and the one end pipe diameter that is connected with the shower nozzle is less than the other end pipe diameter.

As a further improvement of the utility model: the spray head adopts a porous Laval nozzle with a central hole.

As a further improvement of the utility model: the central tube and the outer tube are made of austenitic high-temperature resistant stainless steel.

As a further improvement of the utility model: the austenitic high temperature resistant stainless steel is of the type 316L, 253ma or 310s.

As a further improvement of the utility model: the air cooling device is a cyclone device, and the cyclone device comprises a spiral blade and a pressure regulating pipe; the spiral blades are uniformly distributed and fixedly connected on the outer wall of the central tube in circumference; the pressure regulating pipe is fixedly connected to the outer wall of the central pipe.

Compared with the prior art, one or more technical schemes provided by the embodiment of the utility model have at least the following technical effects and advantages:

1. the outer tube of the utility model is sleeved outside the central tube, the outer tube is provided with an oxygen inlet, the air cooling device is arranged between the central tube and the outer tube, and the outer tube is forced to be cooled by air. The utility model adopts air cooling, is water-free refrigeration, avoids safety accidents caused by water leakage, avoids consuming a large amount of water resources, avoids water-cooling matched equipment consuming a large amount of electric energy, saves energy, reduces emission and is beneficial to environmental protection.

2. The central tube and the outer tube are made of austenitic high-temperature resistant stainless steel. The gun body is made of austenitic high-temperature resistant stainless steel, the internal and external temperature difference of 1400 ℃ is continuously used, the internal and external temperature difference of 1750 ℃ is intermittently used, an oxygen gun nozzle with a central hole is adopted in a front high-temperature area, and long-acting of the nozzle is completed through air flow protection. Through the arrangement of the forced cooling device and the application of special austenitic stainless steel, the oxygen used for converter steelmaking is utilized to lead the outer tube of the oxygen lance to achieve high-position heat balance.

3. The diameter of the spray head is smaller than that of the outer tube. The simple deslagging is realized through the reducing arrangement of the gun body and the nozzle connecting pipe.

4. The utility model is provided with a laser thermometer. The laser thermometer probe is fixedly connected at the end of the central pipe, and the rear of the central hole of the spray head is used for detecting the temperature of molten steel in real time, so that the steelmaking process is easier to control, and an optimal data acquisition point is provided.

Drawings

FIG. 1 is a schematic cross-sectional view of the structure of the present utility model;

FIG. 2 is a schematic view of the structure of a central tube, a cyclone device and an outer tube of the utility model;

FIG. 3 is a schematic front view of the structure of the central tube and the cyclone device of the utility model;

FIG. 4 is a schematic side view of the structure of the center tube and swirling device of the present utility model.

In the figure: 1-a central tube 2-an outer tube 3-a cyclone device 31-a helical blade 32-a pressure regulating valve 4-a spray head 5-an instrument cooling air tube 6-an oxygen tube 7-a laser thermometer

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

[ example ]

As shown in fig. 1-4, the anhydrous oxygen lance for the converter comprises a central tube 1, an outer tube 2, an air cooling device (a cyclone device 3), a spray head 4, an instrument cooling air tube 5, an oxygen tube 6 and a laser thermometer 7.

The outer tube 2 is sleeved outside the central tube 1, and the axis of the outer tube 2 is the same as that of the central tube 1. The axis of the instrument cooling air pipe 5 is vertical to the central pipe 1, and the instrument cooling air pipe 5 is fixedly connected to the left end of the central pipe 1 and is positioned outside the outer pipe 2.

The spray head 4 adopts a multi-hole Laval nozzle with a central hole. The spray head 4 is fixedly connected to the right end of the outer tube 2. The outer tube 2 adopts reducing arrangement, and the right end pipe diameter of the joint with the spray head 4 is smaller than the left end pipe diameter. The simple deslagging is realized through the reducing arrangement of the gun body and the nozzle connecting pipe.

The oxygen pipe 6 is L-shaped, the vertical pipe axis of the oxygen pipe 6 is vertical to the axis of the outer pipe 2 and fixedly connected to the left end of the outer pipe 2, and the horizontal pipe axis of the oxygen pipe 6 is parallel to the axis of the outer pipe 2.

The central tube 1 and the outer tube 2 are gun bodies of oxygen guns, and are made of austenitic high-temperature-resistant stainless steel. Preferably 316L, 253ma or 310s austenitic high temperature resistant stainless steel. The gun body is made of austenitic high-temperature resistant stainless steel, the product continuously uses the heat balance internal and external temperature difference of 1400 ℃, the heat balance internal and external temperature difference of 1750 ℃ is intermittently used, the front high-temperature area adopts the oxygen gun spray head 4 with a central hole, and the spray head 4 is long-acting through air flow protection. Because of the special properties of the materials, the oxygen lance is selected as a top-blown oxygen lance, and fatigue failure is molten in the process of inserting the nozzle 4 into the molten pool oxygen lance, so that the danger of sudden fracture can be avoided.

A plurality of swirling devices 3 are arranged along the axis of the central tube 1, and the swirling devices 3 are positioned between the central tube 1 and the outer tube 2. The rotational flow device 3 comprises a spiral blade 31 and a pressure regulating tube 32,6 spiral blades 31 are uniformly distributed on the circumference and fixedly connected to the outer wall of the central tube 1 along the axis, and the pressure regulating tube 32 is fixedly connected to the outer wall of the central tube 1 along the axis.

Cooling air enters the outer tube 2 from the oxygen tube 6, forms rotational flow air through the rotational flow device 3, and forcibly cools the outer tube 2.

The laser thermometer 7 is an existing product, the probe of the laser thermometer is fixedly connected to the right end of the central tube 1 and is positioned at the left end of the central hole of the spray head 4, instrument cooling gas enters the central tube 1 through the instrument cooling gas pipe 5, the laser thermometer 7 is used for monitoring the temperature of a molten pool in real time, detecting the temperature of molten steel in real time, the steelmaking process is easier to control, and an optimal data acquisition point is provided.

The utility model eliminates the original water-cooling sleeve and avoids a water leakage point in the production process of the converter. The safety performance of the product is improved, and the fatigue damage to each mechanical position is small due to the fact that the weight of the product is light (about 1/5 of that of an original gun) during operation, so that the potential safety hazard caused by mechanical fatigue is reduced.

The utility model adopts air cooling, is water-free refrigeration, avoids safety accidents caused by water leakage, avoids consuming a large amount of water resources, avoids water-cooling matched equipment consuming a large amount of electric energy, saves energy, reduces emission and is beneficial to environmental protection.

The gun body is made of austenitic high-temperature resistant stainless steel, the internal and external temperature difference of 1400 ℃ is continuously used, the internal and external temperature difference of 1750 ℃ is intermittently used, the front high-temperature area adopts an oxygen gun spray head 4 with a central hole, and long-acting of the spray head is completed through air flow protection. Through the arrangement of a forced cooling device and the application of special austenitic stainless steel, the oxygen used for converter steelmaking is utilized to lead the oxygen lance outer tube 2 to reach high-position heat balance.

The utility model realizes simple deslagging through the reducing arrangement of the gun body and the nozzle connecting pipe.

Compared with the original oxygen gun, the laser thermometer 7 is arranged in the utility model, which increases the on-line detection of molten steel, so that the steelmaking process is easier to control, and an optimal data acquisition point is provided.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme and the concept of the present utility model, and should be covered by the scope of the present utility model. The methods used in the above examples are conventional methods unless otherwise specified.

Claims

1. An anhydrous oxygen lance for a converter, which is characterized in that: comprises a central tube, an outer tube, an air cooling device and a spray head;

the outer pipe is sleeved outside the central pipe, and an air cooling air inlet is formed in the outer pipe;

the air cooling device is arranged between the central pipe and the outer pipe, and is used for forced air cooling of the outer pipe;

the spray head is fixedly connected to the end part of the outer tube.

2. The anhydrous oxygen lance for a converter according to claim 1, wherein: also comprises a temperature measuring instrument,

the probe of the temperature measuring instrument is fixedly connected to the end of the central tube and is positioned at the spray head, and the central tube is provided with an instrument cooling gas inlet.

3. The anhydrous oxygen lance for a converter according to claim 2, wherein: the temperature measuring instrument is a laser temperature measuring instrument.

4. The anhydrous oxygen lance for a converter according to claim 1, wherein: the outer tube adopts the reducing setting, and the one end pipe diameter that is connected with the shower nozzle is less than the other end pipe diameter.

5. The anhydrous oxygen lance for a converter according to claim 1, wherein: the spray head adopts a porous Laval nozzle with a central hole.

6. The anhydrous oxygen lance for a converter according to claim 1, wherein: the central tube and the outer tube are made of austenitic high-temperature resistant stainless steel.

7. The anhydrous oxygen lance for a converter according to claim 6, wherein: the austenitic high temperature resistant stainless steel is of the type 316L, 253ma or 310s.

8. The anhydrous oxygen lance for a converter according to claim 1, wherein: the air cooling device is a rotational flow device,

the rotational flow device comprises a spiral blade and a pressure regulating pipe;

the spiral blades are uniformly distributed and fixedly connected on the outer wall of the central tube in circumference;

the pressure regulating pipe is fixedly connected to the outer wall of the central pipe.