KR200172884Y1 - Lance for suppling the silicon scavenger - Google Patents

Abstract

The present invention relates to a lance for injecting deregulation, and more specifically, to prevent deformation and burnout of the lance body during deregulation operation injecting deregulation into the molten iron, and to prevent the occurrence of deregulation of dust, so that the monitoring of the race car may be desired. The present invention relates to a deregulation blow lance capable of promoting a deregulation reaction.

According to the present invention, a quick joint 21 is installed at the upper end to facilitate attachment and detachment with the blowing line 5, and a control valve for controlling a blowing amount of deregulation in the exterior 20 connected to the cooling air line 28. The inner tube 40 having the 47 is assembled, and in the space 30 formed between the inner and outer tubes 20 and 40, the flow of air supplied from the cooling air line 28 is increased from low speed to high speed. The inner and outer parts 20 are provided with a first swirl portion 32 having a plurality of first screw threads 32a and a second swirl portion 34 having a plurality of second screw threads 34a so as to be switched. Each lower end portion of the 40 is provided with a deregulated blow lance comprising a radially extending enlarged tube (25, 45).

Description

LANCE FOR SUPPLING THE SILICON SCAVENGER}

The present invention relates to a lance for injecting deregulation, and more specifically, to prevent deformation and burnout of the lance body during deregulation operation injecting deregulation into the molten iron, and to prevent the occurrence of deregulation of dust, so that the monitoring of the race car may be desired. The present invention relates to a deregulation blow lance capable of promoting a deregulation reaction.

In general, when dephosphorization (P) works with oxygen in the steelmaking process, because dephosphorine (P) is not properly formed due to the preferential reaction of silicon, silicon containing 0.30% to 0.60% in molten iron is 0,20%. Carry out the desulfurization work below.

In order to perform such a desulfurization operation, as shown in FIG. 1, a deregulator such as a mill scale or a sintered semi-reflective light is transported to the tank lorry 1 and filled in the storage tank 3. The deregulator stored in the storage tank 3 is filled and pressurized into the distribution tanks 4a and 4b, respectively, and the blowing amount is set so that the blowing lances 6a and 6b are connected via the blowing lines 5a and 5b. The silicon component in the molten iron was removed by pouring into the molten iron of the raceway 7a, 7b through the.

2 is a working state illustrating the deregulation blow operation using the deregulation blow lance according to the prior art, when the cross-talk vehicle 10 running along the rail installed near the departure port is waiting, and starting departure, The molten iron 9 flows down the raceway 7 which is operated to alternately transfer the position of the molten iron to both tracks through the water passages such as the large bath and the jitangdo 8, and the lower end is close to the racing barrel 7. The deregulation was continuously blown into the molten iron 9 through a deregulation blow lance 6 which is installed perpendicular to the tech 11 and connected to the blow line 5.

However, in the deregulation blowing process, the blowing lance 6 made of a cylindrical pipe member is in direct or indirect contact with the hot molten iron 9 and the molten iron fly ash of 1510 ° C. or more falling from the falling portion of the scorching furnace 8. The tip of the lance body is melted, or the middle portion of the lance body is deformed, making it difficult to blow the deregulation into the raceway 7, there is a problem that the deregulation work is not made smoothly.

In addition, since a lot of dust is generated when the deregulation supplied from the lance body tip is blown into the molten iron of the racing barrel 7, it causes an obstacle that makes it difficult to monitor the operation of the racing barrel 7 in which the molten iron falls. Accordingly, there was a problem of failing to check the overflow of the charter in the raceway (7) during the operation caused a safety accident.

Therefore, the present invention has been devised in view of such a conventional problem, and its purpose is to prevent deformation and melting of the lance body to smoothly perform the deregulation blow operation, and to make the deregulation dust easy to monitor the race box. It is intended to provide a deregulated blow lance that can suppress occurrence.

1 is a schematic diagram showing a general deregulation supply equipment,

Figure 2 is a working state showing the deregulation operation using a conventional deregulation blow lance,

Figure 3 is an assembly configuration showing a deregulated blowing lance according to the present invention.

Explanation of symbols on the main parts of the drawings

5 ....... Blowing line 7 .......

20 ...... Appearance 21,29 ... Quick Joint

25,35 ... magnifying tube 30 ... space

32a ..... 1st thread 32 ......

34a ..... 2nd thread 34 ...... 2nd swiveling

40 ...... Inner pipe 27,47 ...... Control valve

As a technical configuration for achieving the above object, the present invention,

In the lance to inject deregulation into the charterer of a racing barrel,

A quick joint is installed at the upper end to facilitate attachment and detachment of the blowing line, and an inner tube having a control valve for controlling a blowing amount of deregulation is assembled in an exterior connected to the cooling air line, and is formed between the inner and outer tubes. The space includes a first swirl portion having a plurality of first screw threads and a second swirl portion having a plurality of second screw threads, respectively, so that the flow of air supplied from the cooling air line can be changed from low speed to high speed. Each lower end of the exterior is provided with a deregulated blown lance, characterized in that it comprises a radially extending expansion tube.

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

Figure 3 is an assembly configuration showing a deregulated blow lance according to the present invention, as shown, the blow lance 100 of the present invention is assembled in a double structure of the inner tube 40 in the outer appearance 20 of the hollow park cylindrical type Injecting the deregulation supplied in the inner tube (40) into the raceway (7) to be deregulated, the exterior (20) is easy to attach and detach with the blowing line (5) supplied by the deregulation at the upper end Quick joint 21 is installed so that the outer circumferential surface is connected to the cooling air line 28 and another quick joint 29 through the connection pipe 20a to supply the cooling air into the exterior (10) On the other hand, the connecting pipe (20a) is equipped with a control valve 27 to control the flow of cooling air through the cooling air line 28.

In addition, the upper part of the hollow tube cylindrical inner tube 40 having a smaller size than the outer diameter size of the outer casing 20 is fixed to the upper end of the outer casing 20 through the blowing line 5. A control valve 47 is installed to appropriately control the amount, and at the lower ends of the inner and outer tubes 20 and 40, enlarged tubes 25 and 45 having a fallopian tube shape are respectively enlarged in a radial direction. .

As the space 30 through which the air supplied from the cooling air line 28 flows is formed between the inner and outer pipes 20 and 40 of the hollow park cylindrical shape, the space ( A first swirl portion 32 having a plurality of first screw threads 32a formed in the longitudinal direction is formed at an upper end portion of the 30. Accordingly, the air forcedly introduced into the space 30 between the inner and outer tubes 20 and 40 through the cooling air line 28 rides through the first screw thread 32a to the inner and outer tubes 20 and 40. The air flows by turning to the lower end to cool the lance body.

In addition, the lower end of the space 30 is shorter than the pitch length of the first screw thread 22a, and the second screw thread 34a is extended in the longitudinal direction with a larger number of forming than the first screw thread 22a. The second swirl portion 34 formed to the vicinity of (25) and (45) is formed. Accordingly, the air passing through the first swirl portion 32 at low speed flows while turning the second swirl portion 34 at high speed, and is diffused and exhausted in the circumferential direction through the expansion pipes 25 and 45. Form a vortex.

In addition, the outer circumferential surface at the upper end of the exterior 20 is interfered with the upper end of the installation hole 11a so that the lance body consisting of the inner and outer tubes 20 and 40 can be installed perpendicularly to the installation hole 11a of the deck 11. The latching jaw 20b is provided and configured.

Meanwhile, the first and second swirl portions 32 and 34 may be integrally provided on the inner circumferential surface of the exterior 20 or integrally provided on the outer circumferential surface of the inner tube 40.

It describes the operation of the present invention made of the configuration as described above.

The lower end is close to the raceway (7) of the exit port, the deregulated injection lance 100 is installed perpendicular to the tech (11), the upper end of the lance body consisting of the inner and outer (20, 40) is a quick joint It is configured to communicate with a blowing line 5 through which deregulation is supplied via (21).

When the starting line in which the molten iron (9) from the outlet of the blast furnace is dropped into the raceway (7) is started, by turning the control valve 47 installed at the upper end of the lance body from the closed to the open state of the inner tube 40 When deregulation is put into racing barrel (7) where molten iron is supplied through, the desulfurization operation is started to reduce the content of silicon contained in the molten iron as a line work for removing high phosphorus (P) from molten iron and manufacturing high quality steel. It is.

Simultaneously with this deregulation operation, the control valve 27 connected to the cooling air line 28 and the quick joint 29 is switched from the closed to the open state, thereby cooling the air into the space 30 between the exterior 20 and the inner tube 40. When forcibly supplied, the air forcedly supplied into the space 30 forms an air flow turning from the top to the bottom between the threads 32a of the first swirl portion 32. Accordingly, the lance body heated by the hot molten iron and the molten iron by-product during the desulfurization operation is prevented from being thermally deformed or burned out by being cooled by the cooling air flowing through the first swirl portion 32 to prevent the inner tube 20 from being annealed. Deregulation and blowing work can be continued.

The air passing through the first swirl portion 32 continuously passes through the threaded portion 34a of the second swirl portion 34 and is naturally converted from the low speed flow to the high speed flow, which is the second swirl portion 34. The pitch length of the second screw thread 34a of () is shorter than that of the first screw thread 32a, and the thread of the second screw thread 34a is composed of six more than three thread forming numbers of the first screw thread 32a. Because. As described above, the air converted from the low speed flow to the high speed flow forms the cooling air flow rapidly exhausted to the outside through the expansion tubes 25 and 45 formed at the lower ends of the inner and outer tubes 20 and 40.

Accordingly, a large vortex is formed around the deregulated blowing flow discharged to the lower portion through the inner tube 40 by air exhausted to the outside at high speed through the enlarged tubes 25 and 45 enlarged in the radial direction. Since it is formed in the lower end of the body, when the contact with the molten iron (9) in the raceway (7) is suppressed dust generation of deregulation that occurs while being freely dispersed and at the same time by blocking the wide range of the molten iron (7) 9) It is possible to monitor at all times so that overflow does not occur, so that it is possible to perform safe departure work without any accident.

In addition, the deregulation of the deregulation to remove the silicon component in the molten iron by improving the air permeability of the deregulation by mixing the cooling air discharged from the expansion pipe 25, 45 and the lower discharge pipe discharged from the lower portion of the inner tube 20. It can accelerate the reaction.

According to the present invention having the above-described configuration, the first and second swirl portions are provided in the space between the inside and the exterior so that the air flow can be switched from the low speed to the high speed while turning the cooling air into a first body. Since the lance body heated by the high temperature melting hand can be cooled by the cooling air passing through the swirl part, it is possible to smoothly perform the blowing operation of the deregulator by preventing the molten iron and deformation of the lance body.

In addition, by forming a vortex at the lower end of the lance body, it is possible to block the deregulation of dust generated during the desulfurization work out of the range of the degreaser input, so that the monitoring work of the raceway continuously supplied with the molten iron can be performed smoothly, allowing safe starting work. In addition, since some cooling air and deregulation are mixed, the air permeability of the deregulation can be improved, thereby promoting a deregulation reaction of the deregulation, thereby obtaining a practical effect of producing high quality steel.

Claims (3)

In the lance for blowing deregulation into the molten iron (9) of the raceway (7), A quick joint 21 is installed at the upper end to facilitate attachment and detachment with the blowing line 5, and a control valve 47 for controlling a blowing amount of deregulation in the exterior 20 connected to the cooling air line 28. The inner tube 40 is assembled, and the space 30 formed between the inner and outer tubes 20 and 40 allows the flow of air supplied from the cooling air line 28 to be switched from low speed to high speed. A first swirl portion 32 having a plurality of first screw threads 32a and a second swirl portion 34 having a plurality of second screw threads 34a are provided, respectively. Deregulated blown lances, characterized in that each of the lower end portion is provided with a radially extending expansion tube (25, 45). The method of claim 1, The first and second swirl portions 32 and 34 are integrally provided on the inner circumferential surface of the exterior 20 or integrally provided on the outer circumferential surface of the inner tube 40. The method of claim 1, The second swirl portion 34 is shorter than the pitch length of the first screw thread 22a, and the second screw thread 34a is formed in the longitudinal direction with a forming number greater than the number of forming the first screw thread 22a. Deregulated blow lance characterized in that.