KR101115699B1 - Oxygen lancing apparatus - Google Patents

Abstract

The present invention relates to an oxygen lancing apparatus which enables melting of coagulated matter attached to a blast furnace exit depth and to a water tap, ladle, tundish, wagu, and the like.
Oxygen lancing device according to an embodiment of the present invention is a double tube structure consisting of the inner induction pipe and the outer induction pipe, the wire is continuously supplied to one end of the inner induction pipe is discharged to the other end, the outer induction pipe A lancing device main body having a structure in which a high pressure oxygen is supplied to the space between the outer induction pipe and the inner induction pipe from one end of the discharge pipe and discharged to the other end of the outer induction pipe; A wire supply unit connected to the lancing device main body by a wire supply pipe and continuously supplying the wire to one end of the inner induction pipe; It may be configured to include; an oxygen supply unit is connected by the lancing device body and the oxygen supply pipe, and configured to supply high pressure oxygen to a space between the outer induction pipe and the inner induction pipe.
With the above configuration, the present invention can melt unopened residues such as refractory or iron rods in the blast furnace exit depth, and solidified products of various metals or metal mixtures, such as those currently attached to a water run, ladle, and tundish. In this case, the unmelted residues such as refractory or iron rods in the blast furnace port depth, and the current melting action attached to the water run, ladle and tundish can be continuously performed.

Description

Oxygen lancing device {OXYGEN LANCING APPARATUS}

The present invention relates to an oxygen lancing apparatus that enables melting of unopened residues such as refractory and iron rods in a blast furnace exit depth, and now melting attached to tap water, ladles, tundish and wagu or the like.

In general, in the steel industry, the oxygen lancing is performed to facilitate the discharge of the molten metal through the outlet of the blast furnace, or to remove the current attached due to the solidification of the molten metal to facilities such as ladles, tundish and wagu. have.

Appeal lancing uses the high heat generated by the oxygen reaction between oxygen pipes and oxygen to melt unopened remnants such as refractory or iron rods in the blast furnace exit depth, or to attach them to water, ladle, tundish, etc. It is the work of melting the coagulum.

In the conventional oxygen lancing operation, in order to discharge the melt produced in the blast furnace to the tap hole, the tap hole is opened using an excavation bit attached to the hole, and at this time, the bit is stuck in the tap hole or inside the tap hole. When the current opening was formed and the opening of the exit port became impossible, the opening of the exit port was performed by oxygen lancing.

And while repairing the ladle in order to transfer the molten iron discharged from the blast furnace to the post-process, the molten steel is hardened in the water run, and if the current is generated, repair work of the molten iron becomes difficult. Even in this case, the repair work was performed after removing the current through oxygen lancing.

In addition, in order to start the continuous casting operation, the molten steel in the ladle is injected into the tundish by opening the sliding nozzle of the ladle cassette installed at the bottom of the ladle, but when the current is formed at the boundary point between the ladle and the ladle cassette, the injection of the molten steel becomes difficult. Lose. Also in this case, the continuous casting operation was started after the removal of the now using the oxygen lancing operation.

As such, in the steelmaking process, oxygen lancing is being performed on various objects, so that oxygen lancing can be performed more easily and efficiently.

In a conventional oxygen lancing operation, an oxygen pipe consisting of a pipe of a predetermined length is burned by oxygen supplied while being able to melt a refractory in a depth or a solidified product such as now. In this case, the workers must grab the oxygen pipe and directly access the work place where the lamp is to be melted and perform the oxygen lancing. Therefore, the workers are exposed to the risk of high heat and flying flames, and in particular, as the oxygen pipe of a predetermined length is combusted, the worker gradually approaches the high temperature, thereby causing a problem of increasing the risk exposure. In addition, when the oxygen pipe of a predetermined length is burned and consumed, the oxygen lancing work is not continuous but intermittently performed because the replacement of the new oxygen pipe is required to complete the oxygen lancing work. Increase the efficiency and reduce the working efficiency.

As such, a method for connecting a plurality of oxygen pipes to each other has been proposed to solve the problem caused by the interruption of the oxygen lancing operation, but in order to use a long length of the oxygen pipe, a life-span operator must be put in place, and the replacement of the oxygen pipe There is a new problem, such as the need for additional equipment for.

On the other hand, in the case of using an oxygen pipe made of a pipe of a predetermined length, since the ignition heat and time of a considerable temperature are required for the ignition of the oxygen pile at the initial stage of the lancing operation, the oxygen lancing operation is difficult to be performed continuously, and the ignition of the oxygen pipe is repeated. As a result, there is a power failure in which work cannot be continuous.

In addition, there is a problem that the use is limited only for the purpose of melting the refractory and the like within the depth of the exit port of the blast furnace. That is, there is a drawback that the application is not possible for the removal of the current fused to the equipment such as ladle, tundish and wagu.

The present invention is made by recognizing at least one of the needs or problems occurring in the conventional oxygen lancing apparatus.

It is an object of the present invention to dissolve unopened residues such as refractory or iron rods in a hot water depth such as blast furnaces, and to remove solidified products such as now fused in a cold environment, such as water, ladle, tundish and wagu, etc. It is to make the application possible.

Another object of the present invention is to remove the unopened residues such as refractory or iron rods in the blast furnace opening depth and to remove the coagulum attached to the water, ladle, tundish and wagu, without having to replace the oxygen pipe. To ensure that

Yet another object of the present invention is to allow the worker to perform the oxygen lancing operation continuously without accessing the work place so that the worker is not exposed to the risk of high heat and non-oxide salts.

Another object of the present invention is to allow the oxygen lancing operation to be carried out continuously to shorten the lancing operation time to reduce the fatigue of the operator while improving the work efficiency.

An oxygen lancing device according to an embodiment for realizing at least one of the above problems may include the following features.

The present invention is basically applicable to the removal of unopened remnants such as refractory or iron rods and coagulated objects in the depth of the exit in a hot environment such as a blast furnace and cold environments such as waterways, ladles, tundish and wagu etc. Yet based on being configured to allow oxygen lancing to be carried out continuously without replacement of the oxygen pipe.

Oxygen lancing device according to an embodiment of the present invention comprises a lancing device body consisting of a double tube structure consisting of the inner induction pipe and the outer induction pipe; A wire supply unit connected by the lancing apparatus main body and a wire supply pipe; It may be configured to include; the oxygen supply unit connected by the lancing apparatus body and the oxygen supply pipe.

In this case, the main body of the lansing device is continuously supplied with wires to one end of the inner induction pipe and discharged to the other end, and high pressure oxygen is introduced into the space between the outer induction pipe and the inner induction pipe from one end of the outer induction pipe. It may be supplied and discharged to the other end of the outer induction pipe. In addition, the wire supply unit may be configured to enable continuous supply of the wire so that the wire is introduced from one end of the inner guide pipe and continuously discharged to the other end. In addition, the oxygen supply unit may be configured to supply high pressure oxygen to a space between the outer induction pipe and the inner induction pipe to burn the wire discharged through the other end of the pipe.

On the other hand, the lancing apparatus main body may be further provided with a nozzle for increasing the discharge rate of oxygen in the end region where the wire and high pressure oxygen is discharged.

The lancing device body may be made of a high heat resistant material.

In addition, the oxygen supply pipe and the wire supply pipe may be composed of a bendable pipe.

As described above, according to the present invention, in a hot environment such as a blast furnace, melting of unopened residues such as refractory or iron rods in the depth of the exit port and solidification of the now and the like fused in a cold environment such as turbidity, ladle, tundish and wagu Applications for the removal of water are possible.

In addition, according to the present invention, the operation for removing unopened residues such as refractory or iron rods in the blast furnace opening depth and coagulations attached to the water, ladle, tundish and wagu can be continuously performed without replacing the oxygen pipe. have.

In addition, according to the present invention, since the operator can continuously perform the oxygen lancing operation without access to the work place, the worker is not exposed to the risk of high temperature and non-oxidation salt.

In addition, according to the present invention, since the oxygen lancing operation can be performed continuously, it is possible to shorten the lancing operation time, thereby reducing the fatigue of the operator and at the same time improving the working efficiency.

1 is a front view schematically showing the configuration of an oxygen lancing device according to an embodiment of the present invention.
FIG. 2 is a partially enlarged cross-sectional view illustrating a rear end configuration of the lancing apparatus main body shown in FIG. 1.
3 is a partially enlarged cross-sectional view showing the front end portion of the lancing apparatus main body shown in FIG.

In order to help understand the features of the present invention as described above, it will be described in more detail with respect to the oxygen lancing device associated with an embodiment of the present invention.

Hereinafter, exemplary embodiments will be described based on embodiments best suited for understanding the technical characteristics of the present invention, and the technical features of the present invention are not limited by the illustrated embodiments, It is to be understood that the present invention may be implemented as illustrated embodiments.

Accordingly, the present invention may be modified in various ways within the technical scope of the present invention through the embodiments described below, and such modified embodiments fall within the technical scope of the present invention.

And, in order to help the understanding of the embodiments described below, in the reference numerals described in the accompanying drawings, among the components that will have the same function in each embodiment, the related components are denoted by the same or extension numbers.

Embodiments related to the present invention are basically intended to remove unopened residues such as refractory or iron rods and solidified products such as iron rods in a hot water environment such as blast furnaces and cold environments such as waterways, ladles, tundish and wagu, etc. It is based on being configured so that the oxygen lancing operation can be continuously performed without changing the oxygen pipe.

Referring to the embodiment of the oxygen lancing device according to an embodiment of the present invention.

Hereinafter, for convenience of explanation, various metals or metal mixtures, as well as various metals or metal mixtures attached to unopened residues such as refractory or iron rods or tangs, ladles, tundishes, etc. within the depth of the blast furnace outlet, will be referred to as "coagulations". do.

As shown in FIG. 1, the oxygen lancing device 100 substantially generates heat of dissolution to substantially remove the coagulant, and thus, to generate heat of dissolution in the lancing device body 110 and the lancing device body 110. The wire supply unit 120 may be configured to continuously supply the dissolved wire 120a and the oxygen supply unit 130 supplying high pressure oxygen so that the wire 120a may be burned.

On the other hand, the lancing device body 110 may be configured to be mounted to the mounting portion 140 to perform a lancing operation. In this case, the mounting portion 140 is fixedly mounted at a position at which the lancing apparatus main body 110 can remove the coagulated material, or the mounting portion 140 is configured to be movable in position so that the lancing apparatus main body 110 is It may also be configured to be placed in a position to remove coagulum.

For example, the mounting unit 140 may be provided with a mounting unit body 142 to which the lancing device body 110 is coupled to the base 141 fixed to the floor or provided with a moving means (not shown). As such, a leg 143 for height adjustment may be further provided between the base 141 and the mounting body 142.

The wire supply unit 120 may include, for example, a wire feeder (not shown) in which the wire 120a is wound, and a servo motor (not shown) for rotating the wire feeder. Depending on the rotational direction of the wire feeder by the operation of the motor, the wire 120a may be configured to be wound or released from the wire feeder. In addition, the servomotor may include a first servomotor capable of determining the supply amount of the wire 120a and a second servomotor that unwinds the wire 120a for a smooth supply of the wire 120a. Such a configuration can be configured by a generally known supply means, so a detailed description thereof will be omitted.

In addition, the oxygen supply unit 130 has a conventional hydraulic unit (not shown) that can supply high-pressure oxygen, and the flow rate of the hydraulic system (not shown) or oxygen for measuring the hydraulic pressure of the oxygen supplied from the hydraulic unit It may include a flow meter (not shown) to measure, and can be configured by a means capable of supplying a high pressure oxygen generally known, a detailed description thereof will be omitted.

As shown in FIGS. 2 and 3, the lancing apparatus main body 110 includes an inner induction pipe 112 and an inner guide tube 112 through which the wire 120a which substantially generates heat of dissolution to melt the coagulum. It may be composed of an outer induction pipe 134 which is supplied with high pressure oxygen to be discharged to enable dissolution. In this case, the inner guide pipe 112 may have a structure in which both ends are opened so that the wire 120a is introduced from one end and discharged to the other end. And, the inner induction pipe 112 is disposed inside the outer induction pipe 111 is made of a double pipe structure, one end of the inner induction pipe 112 is to be configured to be connected to the outside of the outer induction pipe 111. Can be.

For example, as shown in FIG. 2, one end of the inner induction pipe 112 is coupled to protrude outward from the end of the outer induction pipe 111 and wires at the end of the inner induction pipe 112 protruding outward. One end of the wire supply pipe 121 connected to the supply unit 120 may be coupled. On the other hand, one end of the inner induction pipe 112 is coupled to the end of the outer induction pipe 111 in a state capable of contacting the outside of the outer induction pipe 111, the wire supply pipe 121 is the inner induction pipe 112 It may be configured to couple to the end of the outer induction pipe 111 in a state in contact with. In this case, the wire supply pipe 121 may be made of a structure of a bendable tube to enable the movement of the lancing device body 110.

By such a configuration, the wire 120a supplied from the wire supply unit 120 is internally formed through one end of the inner induction pipe 112 constituting the lancing device main body 110 through the wire supply pipe 121. It may be introduced into S2) and discharged to the other end.

On the other hand, the outer induction pipe 111 may be disposed in a double pipe structure surrounding the inner induction pipe 112, the outer induction pipe 111 forms a predetermined space (S1) and the outer wall of the inner induction pipe (112). It may be combined with the inner guide tube 112 to. The outer induction pipe 111 is closed at one end adjacent to the end of the inner induction pipe 112 through which the wire 120a is introduced, and is adjacent to the other end of the inner induction pipe 112 through which the wire 120a is discharged. The other end may be opened so that oxygen introduced into the space S1 is discharged to the opened end.

In this case, the oxygen supply unit 131 may be connected to the oxygen supply unit 130 by the oxygen supply pipe 131 so that high pressure oxygen may be introduced from the closed end side of the outer induction pipe 111. In other words, since one end of the oxygen supply pipe 131 is connected to the end side of the closed outer induction pipe 111 and the other end of the oxygen supply pipe 131 is connected to the oxygen supply 130, oxygen of high pressure Is introduced into the end side of the closed outer induction pipe 111 and moved along the space S1 between the outer induction pipe 111 and the inner induction pipe 112 and discharged to the end of the opened outer induction pipe 111. Can be. The oxygen supply pipe 131 may be made of a tube of a bendable structure to allow the movement of the lancing device body 110.

The closed end side of the outer induction pipe 111 may be further provided with a coupling portion 111a as shown to facilitate the connection of the oxygen supply pipe 131.

Meanwhile, as shown in FIG. 3, a nozzle 113 may be further provided at an end portion of the outer induction pipe 111 through which high pressure oxygen is discharged. The nozzle 113 may be formed with a tapered portion 113a inclined inward to increase the flow rate of the discharged oxygen. That is, the tapered portion 113a may have a structure in which the inner diameter thereof becomes narrower toward the end portion. In addition, the nozzle 113 may have an opening having an end portion with a size through which oxygen may be discharged together with the wire 120a.

Meanwhile, the nozzle 113 is attached to or detached from an end portion of the outer induction part 111 opened to be replaced with another nozzle 113 according to the condition of oxygen generated or broken due to a collision with a solidified product or another facility. It may be configured to enable. In this case, the coupling part 113b may be further provided at an opposite end of the discharge side of the nozzle 113. Since the coupling of the nozzle 113 and the outer induction part 111 may be made by a generally known coupling method such as screwing and fitting, a detailed description thereof will be omitted.

On the other hand, the outer induction pipe 111, the inner induction pipe 112 and the nozzle 113 may be made of a material that can withstand high heat, such as, for example, a ceramic material such as silicon nitride.

The oxygen lancing apparatus according to the present invention is not limited to the above-described embodiments, but all or some of the embodiments may be selectively combined for various modifications.

100 ... oxygen lancing device 110 ... lancing body
111 ... outer guiding pipe 111a, 113b ... coupling
112 ... inner guide tube 113 ... nozzle
113a ... taper 120 ... wire supply
121 ... wire supply pipe 120a ... wire
130 ... oxygen supply unit 131 ... oxygen supply line
140 ... Mounting 141 ... Base
142 ... mounting body 143 ... legs

Claims (4)

Consists of a double pipe structure consisting of an inner guide pipe and an outer guide pipe, the wire is continuously supplied to one end of the inner guide pipe and discharged to the other end, the outer guide pipe and the inner guide pipe from one end of the outer guide pipe A lancing device body having a structure in which high pressure oxygen is supplied to the space between the induction pipes and discharged to the other end of the outer induction pipe;
A wire supply unit connected by the lancing device body and a wire supply pipe, the wire supply unit continuously supplying the wire to one end of the inner induction pipe so that the wire is introduced from one end of the inner induction pipe and continuously discharged to the other end;
The lancing device is connected to the main body by an oxygen supply pipe, and configured to supply high pressure oxygen to a space between the outer induction pipe and the inner induction pipe to burn the wire discharged through the other end of the inner induction pipe. Oxygen lancing device comprising a; oxygen supply unit. The oxygen lancing device according to claim 1, wherein the lancing device body further comprises a nozzle for increasing a rate of oxygen discharge at an end region where the wire and the high pressure oxygen are discharged. The oxygen lancing device according to claim 1, wherein the oxygen supply pipe and the wire supply pipe are composed of bendable pipes. The oxygen lancing device according to claim 2, wherein the lancing device body is made of a high heat resistant material.

Images