JPS5910120Y2 - lance device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lance device, and more particularly to a lance device equipped with means for removing ingots attached to the furnace mouth during refining.

2. Description of the Related Art In a metal refining furnace, such as a converter, during refining, ingots may scatter and solidify at the converter mouth, which may block the furnace mouth and make it difficult to continue refining.

Conventionally, in order to remove the metal, workers tilted the converter and blew oxygen gas from a pipe into the furnace mouth to melt and remove the adhered metal, or put the scrap shoe 1 at the furnace mouth. The impact force was used to remove the metal by colliding with it.

These removal methods require a lot of time and effort to remove the metal, are inefficient, and require workers to work in a high-temperature environment where the metal is scattered, making them dangerous. It is.

In the prior art to solve these drawbacks, an oxygen jet is installed at the tip of a refining lance that communicates with the nozzle of the lance to jet oxygen in a radial direction when removing the deposited metal at the furnace mouth. A mantle having an outlet is attached, the tip of the lance is positioned at the furnace mouth, and oxygen gas is jetted from the oxygen jet port of the mantle toward the furnace mouth of the converter to melt and remove the adhered metal.

In this prior art, the work of installing the jacket must be done by a worker at the upper part of the converter, which is inefficient and dangerous.

In addition, since the mantle is not cooled, it is damaged by the high heat load during melting and removing the base metal, and has a short lifespan.

Furthermore, the oxygen gas passes through the nozzle of the lance and becomes a high-speed jet, which is bent at a large angle within the mantle and then flows through the oxygen jet hole in the mantle, reducing the jet energy of the oxygen gas. , high-speed oxygen jet flow cannot be obtained.

Therefore, the efficiency of Ike-metal fusing is inferior.

An object of the present invention is to solve the above-mentioned technical problems and provide a lance device that can safely and efficiently melt and remove metal and has an extended lifespan.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a system diagram of an embodiment of the present invention.

The lance 1 has a conventional structure consisting of a vertically extending lance body 2 and a nozzle tip 3 fixed to the lower end of the lance body 2.

A conventional elevating means for inserting and removing the lance 1 into and from the converter 16 is provided on the upper part of the lance body 2, and the lance 1 is elevated and lowered via the support 4.

A plurality of nozzles 5 are formed on the nozzle chip 3,
The upper end of an oxygen path (not shown) that communicates with this nozzle 5 and is formed in the lance body 2 is a conduit 8 that includes an inverted U-shaped conduit 6, a flexible tube 7, and a control valve 8a. is connected to an oxygen source via.

A cooling water supply pipe 9 for guiding cooling water into the lance main body 2 is connected to the upper part of the lance body 2, and this cooling water supply pipe 9 includes a flexible pipe 10 and a control valve 11a. It is connected via a conduit 11 to a cooling water supply source.

A vertically movable body 12 that surrounds the lance body 2 is provided in the middle of the lance body 2 so as to be movable up and down along the vertical axis of the lance body 2.

A toric body 13 that surrounds the lance body 2 and is rotatable in the circumferential direction is connected to the vertically moving body 12 .

A cylindrical body 14 that surrounds the lance main body 2 and extends up and down is fixed to the lower part of the toric body 13.

A plurality of (eight in this embodiment) fusing nozzles 15 are provided at the lower end of the cylindrical body 14, and the lance 1 is connected to the converter 1.
When the ingot 1 is inserted from the furnace mouth 16a of No. 6 and refining is performed by blowing out oxygen gas from the nozzle 5, the melting nozzle 15 of the cylinder body 14 is inserted into the furnace mouth 16a and solidified in the vicinity of the furnace mouth 16a.
By adjusting the position at position 7 and blowing out oxygen gas from the fusing nozzle 15, the base metal 17 adhering to the vicinity of the furnace opening 16a is removed by fusing.

Moreover, when the cylinder 14 is rotated around its vertical axis,
The base metal 17 attached to the entire circumference of the furnace mouth 16a can be removed.

FIG. 2 is a sectional view of the vicinity of the vertical moving body 12 and the toric body 13, and FIG. 3 is a sectional view taken along the section line III in FIG.

The outer periphery of the lance body 2 has a diameter of 90 mm in the circumferential direction of the lance body 20.
Rails 18 extending vertically along the axis of the lance body 2 are fixed at intervals of 100 degrees.

A groove 18a is formed on the outer surface of the rail 18 over the entire length of the rail 18, and wheels 19 that fit into the groove 18a are formed at the upper and lower ends of the vertical moving body 12.
is provided.

The vertical moving body 12 is movable in the vertical direction by the wheels 19 traveling guided by the rails 18, and since the wheels 19 are fitted in the grooves 18a, the vertical moving body 12 can move in the circumferential direction of the lance body 2. movement is prevented.

The lance main body 2 above the vertical moving body 12 is integrally provided with an elevating drive means, such as an electric cylinder 20.

This electric cylinder 20 includes an electric motor 22 supported on the lance body 2 by a bracket 21, and a connecting rod 23 that is connected to the electric motor 22 via a gear train (not shown) and is vertically expandable and retractable.

The lower end of the connecting rod 23 is connected to the vertical moving body 12, and by operating the electric motor 22 to expand and contract the connecting rod 23, the vertical moving body 12 is moved up and down along the rail 18.

A toric body 13 is supported at the lower part of the vertically movable body 12 via a bearing 24 .

This bearing 24 allows rotation of the toric body 13 about the axis of the lance body 2.

Cylinder brackets 1 and 25 are fixed to the vertically movable body 12, and an air cylinder 27 is pivotally supported to the cylinder brackets 1 and 25 via pins 26 parallel to the axis of the lance body 2.

The pistons 1 to 28 of the air cylinder 27 are connected to the lance body 2.
The tip of the piston rod 28 is extendable and retractable in the horizontal direction perpendicular to the axis of the piston rod 28 .
It is connected to the other end via a pin 30.

Therefore, by expanding and contracting the air cylinder 27, the toric body 13 is rotated around the lance body 2.

A horizontal annular header 31 surrounding the toric body 13 is fixed to the toric body 13 .

Referring again to FIG. 1, this header 31 includes a flexible tube 3.
2. An oxygen supply source is connected through an inverted U-shaped conduit 33 fixed to the support 4, a flexible tube 34, and a conduit 35 provided with a control valve 35a in the middle.

FIG. 4 is a sectional view taken along the section line I1-1V in FIG. 2, and FIG. 5 is an enlarged sectional view of the vicinity of the lower end of the cylindrical body 14.

The cylinder body 14 has an inner cylinder 36 that surrounds the lance main body 2 and extends vertically, a partition cylinder 37, and an outer cylinder 38, which are arranged concentrically in order from the inside to the outside in a triple straight pipe shape. Ru.

Short cylinders 36a and 38 are provided at the lower ends of the cylinder 36 and the outer cylinder 38.
The nozzle tip 39 is fixed by force through a.

A ring-shaped ridge removing member 40 is fixed to the inner periphery of the nozzle tip 39 for slidingly contacting the outer periphery of the lance body 2 and scraping off base metal adhering to the outer periphery of the lance body 2.

A stuffing box 42 having a flange 41 for fixing to the lower part of the toric body 13 is fixed to the upper end of the outer cylinder 38, and the upper end of the inner cylinder 36 is sealed airtightly and slidably by a gland packing 43. It is held movably.

The upper end of the partition tube 3f is fixed to the stuffing box 42.

The nozzle tip 39 is provided with fusing nozzles 15 at equal intervals in the circumferential direction.

The axis of the fusing nozzle 15 is in the radial direction of the lance body 2.

A plurality of oxygen pipes 46 (eight in the figure) extending in the vertical direction are provided inside the partition cylinder 37 in the radial direction to form an oxygen path 45 therein.

The lower end of this oxygen tube 46 is connected to the nozzle tip 39 via a short tube 46a, so that the oxygen path 45 and the nozzle 15 for melt bullets are individually communicated.

Each oxygen tube 46 is held slidably in the vertical direction within a groove 47 that curves convexly outward in the radial direction over the entire length of the partition tube 37 .

The upper end of the oxygen pipe 46 passes through the stuffing box 42 through a gland packing 48 so as to be slidable in the axial direction.

The upper end of each oxygen tube 46 is connected to a conduit 49 that extends radially through the torus 13 above the stuffing box 42.
and is connected to the lower part of the header 31 via a flexible tube 50.

Therefore, the fusing nozzle 15 includes an oxygen path 45, a flexible tube 34, a tube 33, a flexible tube 32, a header 31, a flexible tube 50, a tube 49, and an oxygen tube 46 in order from the oxygen supply source. Oxygen gas is introduced through the melt-cutting nozzle 15 and is ejected radially outward from the cylinder 14 .

At the top of the partition tube 37, there is a conduit 5 for introducing cooling water.
One end of 1 passes through the outer cylinder 38 and is connected thereto.

The other end of this conduit 51 is connected to a cooling water return pipe 53 (see FIG. 1) of the lance body 2 via a flexible pipe 52.

One end of a conduit 54 for leading out cooling water is connected to the upper part of the outer cylinder 38.

The other end of the conduit 54 includes a flexible tube 55, an inverted U-shaped conduit 56 fixed to the support 4, a flexible tube 57, and a control valve 58.
It is connected to a cooling water return pipe 58 provided with a.

Therefore, after cooling the lance body 2, the cooling water passes through the cooling water return pipe 53, the flexible pipe 52, and the conduit 51 to the inner cylinder 3.
6 and the partition tube 37, the water is introduced into the cooling water path 59 formed between the tube 6 and the partition tube 37, flows downward through the cooling water path 59 as shown by the arrow, and is turned over while cooling the tip 39 at the lower end of the partition tube 37. Then, the cooling water passes through the cooling water path 60 formed between the outer cylinder 38 and the partition cylinder 37 upwardly as shown by the arrow, and above the cooling water path 60, the flexible tube 55 and the pipe are separated from the conduit 54. The cooling water is led to a cooling water return pipe 58 via a passage 56 and a flexible pipe 57, and is discharged.

During refining, in order to remove the ingot 17 attached to the furnace opening 16a of the converter 16, the electric cylinder 20 is operated to bring the fusing nozzle 15 to the position of the ingot 17 attached to the furnace opening 16a. As shown in FIG.
Then, the cylindrical body 14 is moved up and down to adjust and arrange it.

Next, the control valve 35 a is opened to introduce oxygen gas from the oxygen supply source to the cutting nozzle 15 .

Then, the oxygen gas flows through the cylinder body 14 through the fusing nozzle 15.
is ejected radially outward toward the inner periphery of the furnace port 16a.

Furthermore, the fusing nozzle 15 is moved in the circumferential direction of the lance body 20 via the annular body 13 and the cylindrical body 14 by expanding and contracting the air cylinder 27, so that the oxygen gas is distributed to the inner circumference of the furnace mouth 16a. is ejected evenly, so that the furnace opening 1
The base metal 17 attached to 6a is removed all around the circumference.

Since these operations are performed by remote control, there is no need for workers to approach the dangerous upper part of the converter, which is safe.

In addition, unlike the prior art, oxygen gas is not ejected by passing through the nozzle 5 of the nozzle tip 3 and the oxygen outlet of the mantle, but the oxygen gas for fusing passes only through the fusing nozzle 15, resulting in less energy loss. Oxygen gas is ejected.

Note that the electric cylinder 20 may be fixed to a portion that moves together with the lance body 2, for example, to the support body 4.

Further, instead of the electric cylinder 20, a wire drum and its driving source may be provided, and a wire rope may be connected to the vertically moving body 12 to drive the vertically moving body 12 up and down.

FIG. 6 is a sectional view of another embodiment of the present invention, and parts corresponding to the embodiments of FIGS. 1 to 5 are given the same reference numerals.

In this embodiment, the cylindrical body 14 is driven to rotate around the axis of the lance body 2.

A horizontal annular fixed half member 6 is provided on the outer periphery of the vertically movable body 65.
6, 67, and 68 are fixed.

Fixed half members 66, 67. 68 is open outward in the radial direction of the lance body 2.

A horizontal annular rotary half member 6 having an open end face opposite to the open end faces of these fixed half members 66, 67, and 68.
9, 70, 71 are rotary seal members 72. 73.
The fixed half members 66, 67, and 68 are airtightly and rotatably slidably attached to the fixed half members 66, 67, and 68 via 74.

An oxygen gas supply chamber 75 is defined by the fixed half member 66 and the rotating half member 69.

A cooling water supply chamber 76 is formed by the fixed half member 67 and the rotating half member 70, and a cooling water return chamber 77 is formed by the fixed half member 68 and the rotating half member 71.

A pipe line 78 for introducing oxygen gas into the oxygen gas supply chamber 75 is connected to the fixed half member 66 .

Oxygen gas from the oxygen gas supply chamber 75 is supplied to the rotating half member 6
It is led to the oxygen pipe 46 via a pipe line 79 connected to the oxygen pipe 9 .

Cooling water is introduced into the cooling water supply chamber 76 from a conduit 80 connected to the fixed half member 67 , and is led to the cooling water path 59 via a conduit 81 connected to the rotating half member 70 .

Cooling water from the cooling water path 60 is led to the cooling water return chamber 77 from a pipe 82 connected to the rotating half member 71 and is led out from a pipe 83 connected to the fixed half member 68.

With the structure as described above, the vertical moving body 65 is provided with a drive source (not shown), and the toric body 13, the cylinder 14, the rotating half members 69, 70,
71 is rotated integrally around the axis of the lance body 2.

By doing so, the fusing nozzle 15 is connected to the furnace opening 16.
The base metal 17 adhering to the furnace mouth 16a can be completely removed by melting by rotating around the entire circumference of the furnace mouth 16a.

As described above, according to the present invention, the lance is provided with a vertical moving body that can freely move up and down along its axis, and the cylindrical body having the cutting nozzle connected to the oxygen supply source through the oxygen path at the lower end is moved up and down. Since the vertically movable body and hence the cylinder body are raised and lowered by a lifting means connected to the movable body and fixed to the lance body or support body, the metal melting work at the furnace mouth can be remotely controlled, and the melting work can be performed easily. Be safe.

Moreover, since the vertically movable body and the cylindrical body are movable relative to the lance, it is possible to melt and remove the base metal at the same time during refining.

Therefore, the time for removing the deposited metal, which is essential for the operation of the converter, is included in the refining time, improving the efficiency of the refining work.

Furthermore, since the cooling water path is formed within the cylinder, the melting nozzle will not be damaged by the high heat load during melting and removing the base metal, and the life of the melting nozzle will be extended.

The cylindrical body is pivoted or rotated around the axis of the lance by a rotary drive means fixed to the vertically movable body, so that oxygen gas is ejected from the melting nozzle over the entire circumference of the furnace mouth, so that oxygen gas is not attached to the furnace mouth. The bare metal can be completely removed by cutting.

Furthermore, in the present lance device, the oxygen gas does not flow through the lance nozzle and the oxygen jet port and the ejection energy is dissipated as in the prior art, so the oxygen gas can be ejected at a relatively high velocity. Therefore, the adhered metal can be efficiently removed by cutting.

[Brief explanation of drawings]

FIG. 1 is a system diagram of an embodiment of the present invention, FIG. 2 is a sectional view of the vicinity of the vertical moving body 12 and toric body 13 in FIG. 1, and FIG. 3 is a cross-sectional view taken along the section line III-III in FIG. 4 is a sectional view taken along section line IV-IV in FIG.
The figure is a cross-sectional view of the vicinity of the lower end of the cylinder 14, and FIG. 6 is a cross-sectional view of another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Lance, 12... Vertical moving body, 14... Cylindrical body, 15... Melting nozzle, 17... Furnace date landing metal, 20... Electric cylinder, 27... Air Cylinder,
45...Oxygen pathway, 59. 60...Cooling water route.

Claims (1)

[Scope of utility model registration request] A cylinder that surrounds the lance and extends vertically along the axis of the lance, with a vertically movable body provided on a lance that has a vertical axis and moves up and down in the vertical direction, so as to be able to move up and down along the axis of the lance. The body is connected to the vertically movable body so as to be freely displaceable relative to the vertically movable body in the circumferential direction of the lance, and a fusing nozzle is formed at the lower end of the cylinder, and a cooling water path is formed in the cylinder. providing an oxygen path surrounded by a cooling water path and communicating with the nozzle, connecting these oxygen paths to an oxygen supply source, and raising and lowering the vertically movable body by a lifting means fixed to the lance body or the lance support; A lance device characterized in that a cylindrical body is pivoted or rotated around the axis of the lance by a rotary drive means fixed to a vertically movable body.