KR20000004356U - Water-cooled jet burner nozzles for steel mills - Google Patents

Abstract

The present invention supplies auxiliary heating materials such as oxygen, natural gas, and alternative fuel into the furnace so that sufficient amount of supplemental heat is delivered to the blind area where heat is insufficient in the melting of the iron, thereby reducing the melting time and The water-cooled jet burner nozzle applied to the steelmaking furnace to maintain the alignment, forming a space in the center of the plane, the fastener and the supply / drain hole is perforated along the outer periphery, the bottom of the outer periphery An upper body; The inner tube is installed to allow air or oil to be injected from the outside and sprayed through the nozzle, and the side pipe is also tightly fitted to the space portion, including the side tube installed to allow oxygen to be injected through the nozzle and the tip is tapered. A cylindrical first conduit made of; A second pipe line inclined at a predetermined angle on one side of the upper body to allow oxygen and air to flow therein; Provided with a lower body in communication with the inner body so as to be tightly coupled to the bottom of the upper body can be fixed, in the center of the planar tapered coupler to correspond to the tapered tip of the first conduit, formed along the outer periphery Including fasteners and drains; A guide path extending inclined from one side of the lower body to communicate with the second pipe in a straight line; And a supply / drain pipe for cooling water circulation in the plane of the upper body fastened in this way.

Description

Water-cooled jet burner nozzles for steel mills

The present invention relates to an auxiliary heater applied to a steelmaking furnace. In particular, by supplying auxiliary heating materials such as oxygen, natural gas, and alternative fuel into the electric furnace, a sufficient amount of supplemental heat in a blind spot where heat is insufficient in the melting furnace during scrap metal melting. The present invention relates to a water-cooled jet burner nozzle applied to an iron making electric furnace for shortening the dissolution time and maintaining proper heat in the furnace.

In general, a steelmaking electric furnace is provided for dissolving and recycling various scrap metals by using high temperature heat generated by arc discharge using a three-phase electrode to improve efficiency of the arc discharge. Care must be taken at all times to promote even melting of the scrap.

In general, alternative fuels, such as oxygen, air, natural gas, and charcoal, may be selectively used as fuels applied to an electric furnace to promote melting of scrap metal, and a separate robot installed outside the electric furnace to supply them. In general, the use of the seal is to inject the feed pipe into the electric furnace in a state where the supply pipe is tightly mounted using the arm and then maintain the proper rotation radius.

In other words, while most of the scrap iron is already sufficiently melted to fill a portion of the electric furnace, oxygen and oxygen are promoted as a means of minimizing the waste of fuel and process loss caused by the remaining scrap of scrap iron that has not been dissolved yet. By inputting and burning flammable materials with sufficient ignition power, the efficiency of dissolution can be maximized.Also, alternative fuels, such as charcoal ash, are suitable from inside to the inside of furnace to play the role of preventing oxidation by supplying oxygen only. It is sprayed while maintaining the injection pressure and the rotation radius of the to increase the melting rate of the scrap metal and to spread evenly.

However, as the supply pipe of the direct auxiliary heating material is introduced into the electric furnace as described above, frequent replacement is required due to the weakening of the durability of the supply pipe due to the high temperature arc discharge, which results in process loss. Of course, this includes the problem of excessive maintenance and expenses.

Therefore, the present invention is applied to an electric furnace to provide various auxiliary heating materials stably and continuously while maintaining excellent durability even for long time use, so that a sufficient amount of supplemental heat is stably supplied even in a blind spot where heat is insufficient in the melting of the scrap metal. Its purpose is to ensure that it is supplied.

In order to satisfy the above objectives, the present invention has been conceived to provide a water-cooled burner nozzle capable of cooling water circulation and to be connected to various supply pipes.

The present invention for achieving the above object is to form a space in the center of the plane, the fastener and the supply / drain hole is perforated along the outer periphery, the bottom of the outer periphery of the circular upper body formed with a recess; The inner tube is installed to allow air or oil to be injected from the outside and sprayed through the nozzle, and the side pipe is also tightly fitted to the space portion, including the side tube installed to allow oxygen to be injected through the nozzle and the tip is tapered. A cylindrical first conduit made of; A second pipe line inclined at a predetermined angle on one side of the upper body to allow oxygen and air to flow therein; Provided with a lower body in communication with the inner body so as to be tightly coupled to the bottom of the upper body can be fixed, in the center of the planar tapered coupler to correspond to the tapered tip of the first conduit, formed along the outer periphery Including fasteners and drains; A guide path extending inclined from one side of the lower body to communicate with the second pipe in a straight line; And a supply / drain pipe for cooling water circulation in the plane of the upper body fastened as described above to be fastened.

1 is a perspective view of a water-cooled jet burner nozzle provided according to an embodiment of the present invention

FIG. 2 is an enlarged perspective view illustrating one main component of FIG. 1. FIG.

3 is a side cross-sectional view of FIG.

Figure 4 is a side cross-sectional view of the assembled state of the jet burner nozzle of the present invention

Figure 5 is a perspective view of a water-cooled jet burner nozzle showing another embodiment of the present invention

FIG. 6 is an enlarged perspective view illustrating one main component of FIG. 5. FIG.

FIG. 7 is an enlarged perspective view of another main component of FIG. 5; FIG.

8 is another modified embodiment of the present invention

* Description of the symbols for the main parts of the drawings *

10,40: upper body 10a: groove

11: space part 12: fastener

13: supply / drain 14: second duct

14a: bonding plate 14b: elastic spring

15,41: first pipe 15a, 15b: injection hole

16: inner tube 17,42,43: side tube

18,44: Supply / drain pipe 20,50: Lower body

21: supply passage 22: guideway

23: coupler 30: fastening bolt

40a: support member 45: fixing member

45a: coupling hole

Hereinafter, a preferred embodiment of the present invention according to the accompanying drawings will be described in more detail.

1 is a perspective view of the water-cooled jet burner nozzle of the present invention, and FIGS. 2 and 3 show each main part of FIG. 1 in a perspective view and a cross-sectional view.

The jet burner nozzle provided by the embodiment of the present invention is configured to be separated into an upper body 10 and a lower body 20 that is tightly coupled to the upper body 10 to form an integration.

The upper body 10 is provided in a cylindrical state in which only the bottom surface of the lower portion is formed in a circular shape made of a general metal material, and the bottom surface of the outer circumference is formed with a coupling groove portion 10a, and the plane In the center, a circular space portion 11 is formed while maintaining a diameter in which a first pipe line 15 to be described later can be closely fitted, and a lower body (along the outer periphery of the space portion 11) The plurality of fasteners 12 and the water supply / drainer 13 for cooling water circulation are perforated in an annular shape so as to allow the fastening bolt 30 to be positioned.

In addition, any one side of the upper body 10 is integrally inclined at an angle to a certain angle, and is provided with a second conduit 14 through which a sufficient amount of oxygen and air can be introduced from the outside. The lower end of the upper body 10 is formed to form a horizontal line almost the same as the lower end.

At this time, the coupling plate 14a is coupled to the upper end of the second conduit 14 so as to be elastically coupled to a separate outer conduit (for example, a supply pipe) by the elastic spring 14b.

The circular space portion 11 has a structure in which the upper plane is blocked, and the above-described first pipe line 15 having a cylindrical shape is mainly made of a stainless material, and is tightly fitted in the vertical direction and fixed to the upper body 10. The tip of the first conduit 15 protruding toward the lower end of the pipe is configured in the shape of a tapered nozzle, and a plurality of injection holes 15a, 15b are formed at the center and the circumference of the bottom surface thereof. The thickness is given to the nozzle inner surface so that the length of the injection hole 15a, 15b may become more than a predetermined length.

At this time, the inner tube 16 vertically entered through the inner central surface of the first conduit 15 is installed while penetrating the planar center of the first conduit 15 to be inserted into the injection hole 15a in the inner center of the inner surface. Air or oil can be introduced and discharged, and by installing one side pipe 17 on one side of the first pipe line 15 and installing it in a perpendicular direction, the first pipe line (with oxygen introduced from the outside) The cross-sectional state diagram is shown in FIG.

On the other hand, the bottom body 20 is tightly inserted into the groove portion 10a of the upper body 10 as a whole to maintain a one-piece integral shape is made of pure copper material to perform the role of burner as a whole life of the nozzle The supply passage 21 is formed along the thickness of the outer circumferential surface so that the cooling water can be circulated to improve the extension and durability, and the lower portion of the second conduit 14 is tightly fixed to the thick portion of one side without difficulty. A guide path 22 having the same inclination angle is provided so that the taper coupler is tapered toward the center of the plane of the lower body 20 so as to be fitted in a natural correspondence with the tapered tip of the first conduit 15. Of course, the 23 is formed, and the separate supply / drainage pipe 18 for fastening the cooling water to the supply / drainage port 13 formed in the upper body 10 in the coupled state is configured to be fastened. The side cross-sectional view of the coupled state as shown above is shown in FIG.

5 is a perspective view of a water-cooled jet burner nozzle illustrating another embodiment of the present invention, and FIGS. 6 and 7 are enlarged perspective views of the main part of FIG. The lower body 40, 50 is divided into tightly used to be used, and the first pipe line 41, which is mainly made of a stainless material is provided, the oxygen and toward one side of the outer peripheral surface of the first pipe line 41 A plurality of side pipes (42) and (43) are installed adjacent to each other so that natural gas can be injected and injected at an appropriate pressure, and when installed on an electric furnace, one of the upper bodies (40) for firm support of the nozzle It may also be considered to form the support member 40a protruding integrally from the side, and of course, a separate supply / drain pipe 44 may be provided to allow the coolant to circulate therein.

In addition, Figure 8 is another modified embodiment of the present invention, one end of the outer circumferential surface of the first conduit 41, the coupling hole 45a is formed at the top to provide a sense of positioning and stability when applied to the electric furnace in use The fixing member 45 protruding to a predetermined length can be integrated.

The water-cooled jet burner nozzles applied to the electric furnace with the above configuration are supplied with alternative fuels such as oxygen, air, natural gas, and charcoal, respectively, so as to provide adequate heat to the blind spot in the electric furnace. Bar, at this time, the material of pure copper is adopted to prevent wear concentrated on the tip, it is possible to assemble and fasten the tip for easy cleaning of the inside and replacement if necessary.

Therefore, the present invention realizes the efficiency of combustion in the steelmaking furnace, and supplies auxiliary heating material stably and continuously, so that supplemental heat is transmitted to the blind spot where heat is insufficient in the melting furnace, so that the melting time is shortened and It is useful for maintaining alignment.

On the other hand, the present invention is not limited thereto, but the present invention is not limited thereto, and may be considered without departing from the scope of the present invention if limited to the appended claims may be considered a change of the embodiments described so far. Of course.

Claims (2)

A circular upper body having a space in the center of the plane, the fasteners and the water supply / drainage holes perforated along the outer periphery thereof, and the bottom of the outer periphery having grooves formed therein; The inner tube is installed to allow air or oil to be injected from the outside and sprayed through the nozzle, and the side pipe is also tightly fitted to the space portion, including the side tube installed to allow oxygen to be injected through the nozzle and the tip is tapered. A cylindrical first conduit made of; A second pipe line inclined at a predetermined angle on one side of the upper body to allow oxygen and air to flow therein; Provided with a lower body in communication with the inner body to be tightly coupled to the bottom of the upper body to be fixed, in the center of the coupling tapered coupling sphere to correspond to the tapered tip of the first pipe, the fastening formed along the outer periphery Including a sphere and a drain / drain; A guide path extending inclined from one side of the lower body to communicate with the second pipe in a straight line; And a water-cooled jet burner nozzle applied to the steelmaking electric furnace, wherein a supply / drain pipe for circulating the cooling water is provided in the plane of the upper body fastened as described above. According to claim 1, A plurality of side pipes are provided adjacent to each other so that the oxygen and natural gas is injected to one side of the outer circumferential surface of the first pipe can be injected at an appropriate pressure, the upper body of the support for installation Water-cooled jet burner nozzles are applied to the steelmaking furnace characterized in that the one side protruding support member is further provided.