JPH09157717A - Method for repairing iron tapping hole and repairing tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten the time needed to repair an iron tapping hole and to reduce the labor of a worker. SOLUTION: Jet holes 12 for jetting liquid from the tip end surface are arranged at the implanting position of chips 7 implanted to the outer peripheral part of tip end surface of a repairing tool 4. A nozzle 13 may be fitted to the jet hole 12. Then, the repairing tool 4 is fitted to the tip part of a machine drill capable of rotating, hitting and digging and the solidified molten iron, etc., is crushed by driving the machine drill under state of abutting the tip part of the repairing tool 4 on the solidified molten iron, etc. Further, the crushed solidified molten iron, etc., is removed by fluid jetted from the jet holes 12. In the case of mixing the liquid for cooling the repairing tool 12 with the fluid, this liquid is exhausted in misty state together with the fluid from the tip end of the repairing tool 4 through the action of the nozzle 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a repairing method for removing hot metal and the like adhering to tapholes of blast furnaces, converters and the like, and a repairing tool used therefor.

[0002]

2. Description of the Related Art With the discharge of hot metal from tapholes in blast furnaces and converters, etc., hot metal and the like adhere to these tapholes. There is a risk of blockage and difficulty in discharging hot metal. Therefore, conventionally, an operator appropriately repairs the tap hole by using a breaker or the like held by hand to remove the adhered hot metal or the like.

[0003]

However, since the work efficiency of the breaker on hand is low, it takes a long time for the repair work, while the work temperature around the taphole is high, so that one work time is short. I had to do it. As a result, in the conventional tap hole repairing method, there has been a problem that the time required for repairing is increased and a great amount of labor is required for the worker. The present invention has been made in view of the above circumstances, and shortens the time required to repair a taphole,
The purpose is to reduce the labor of workers.

[0004]

SUMMARY OF THE INVENTION The present invention relates to a repairing method for removing molten pig iron and the like adhering to the tap hole of a blast furnace, a converter, etc., and a repairing tool used therefor. The method of repairing the taphole according to is that a repair tool is attached to the tip of a rock drilling machine capable of rotary impact excavation, and the rock drilling machine is driven with the tip of the repair tool being in contact with the hot metal or the like. The feature is that the hot metal and the like are pulverized and removed.

In this case, while ejecting a fluid for removing the crushed hot metal and the like from the tip of the repair tool,
The hot metal or the like may be crushed and removed, and further, in the fluid,
Mix the liquid for cooling the repair tool, and
The fluid may be atomized and discharged from the tip of the repair tool together with the fluid.

Further, the repair tool used in the repair method of the present invention has a plurality of cutting blades planted at least on the outer peripheral portion of the tip surface thereof, and a fluid is supplied from the tip surface to the planting portion of these cutting blades. The feature is that an ejection port for ejecting is provided.

In this case, the liquid for cooling the repair tool can be mixed with the fluid, and the liquid supplied to the injection port is atomized into the injection port together with the fluid and discharged from the tip surface. You may attach the nozzle which makes it.

[0008]

Embodiments of the present invention will be described below in more detail with reference to the drawings. FIG. 1 shows an example of an embodiment of the present invention, which is a known construction vehicle 1
The rock drilling machine 3 capable of rotary impact excavation is attached to the tip of the arm 2, and the repair tool 4 is attached to the tip of the rock drilling machine 3.

The structure of the repair tool 4 is shown in FIGS.
Reference numeral 5 is a holder that constitutes the main body of the repair tool 4, and this holder 5 has a cylindrical shape, and a screw 6 for attaching to the rock drill 3 is coaxial with the holder 5 on its outer peripheral surface on the base end side. It is screwed to form an eggplant. The holder 5 is gradually expanded in diameter toward the tip side, and a plurality of tips (cutting blades) 7 made of cemented carbide or the like are planted on the outer peripheral portion of the tip surface.

On the other hand, the central portion of the front end surface of the holder 5 recedes to the base end side to form a recessed portion 8, and a plurality (eight in the figure) of discharge grooves 9 are directed radially outward from the recessed portion 8. It is formed radially. Further, the outer peripheral ends of these discharge grooves 9 are communicated with the discharge grooves 10 formed on the outer peripheral surface of the holder 5, and as a result, the tip 7 planting portion formed on the outer peripheral portion of the tip end surface of the holder 5 has these groove portions. It is divided into a plurality of (9 in the figure) by 9 and 10.

Reference numeral 11 denotes an air supply port extending from the base end surface of the holder 5 toward the front end side so as to be coaxial with the holder 5. From the front end of the air supply port 11, the above-mentioned tip 7 implantation site is provided. A plurality of injection ports 12 are extended toward the. In the case of the figure, the injection port 12 is opened at each of the chip 7 implantation sites divided into eight positions by the groove portions 9 and 10.

A nozzle 13 is fitted in the injection port 12 from the tip side. The nozzle 13 is for atomizing a liquid (described later) supplied to the ejection port 12 from the base end side and discharging the liquid to the tip end side.

Next, a method of repairing the taphole by the repair tool 4 having the above construction will be described below. First, as shown in FIG. 1, after the repair tool 4 is attached to the tip of the rock drilling machine 3, the tip of the repair tool 4 is brought into contact with the hot metal 14 or the like to be removed. And when the rock drill 3 is driven in this state,
The hot metal or the like 14 is sheared and crushed by the tip 7 implanted in the repair tool 4, and the hot metal or the like 14 is crushed. here,
Since the repair tool 4 is different from a normal excavating tool and does not actively perform excavation, as shown in FIGS. Can achieve the purpose.

On the other hand, at the same time when the rock drill 3 is driven, air (fluid) is supplied to the air supply port 11 from the base end side and is jetted from the tip of the repair tool 4 via the jet port 12. The crushed hot metal or the like 14 is blown away by the pressure of this air, and is discharged and removed to the base end side through the grooves 9 and 10.

As a result, according to the present invention, since the repair tool 4 efficiently repairs the taphole, the time required for repairing the taphole is shortened. Further, since the position of the worker who operates the repair tool 4 is relatively far from the tap hole, the labor of the worker is reduced. Furthermore, the number of workers can be reduced because only one worker is required to ride the construction vehicle 1.

By mixing a cooling liquid such as water or oil with the air supplied to the air supply port 11, and passing the mixture of the air and the liquid into the air supply port 11 and the injection port 12, The repair work may be performed while cooling the repair tool 4. As a result, the temperature rise of the repair tool 4 due to contact with the hot metal or the like 14 is suppressed, and the excavation efficiency is improved. Moreover, since the liquid is mixed with the air by the action of the nozzle 13 fitted in the ejection port 12 and discharged in the form of a mist, the amount of the liquid used is relatively small and the tapping by the liquid is performed. It is possible to suppress the temperature decrease in the mouth and the occurrence of thermal strain at the taphole.

In FIG. 1, the rock drilling machine 3 is attached to the tip of the arm 2 of the known construction vehicle 1 and the repair tool 4 is attached to the tip of the arm 2, but the position of the tap hole to be repaired and The repair rock drill 3 may be fixed to a pedestal or the like depending on the installation environment or the repair frequency. Also, the air supply port 1
When the cooling liquid is not mixed with the air supplied to No. 1, the nozzle 13 is unnecessary.

[0018]

As described above, in the case of the present invention, by using a dedicated repair tool for repairing the taphole, the time required for repairing the taphole is shortened and the labor of the worker is reduced. The effect is obtained.

[Brief description of the drawings]

FIG. 1 is a diagram showing an example of usage of a repair tool according to the present invention.

FIG. 2 is a half-cut sectional view seen from the arrow II side showing an example of the shape and structure of a repair tool according to the present invention.

FIG. 3 is a front view seen from the arrow III side showing an example of the shape and structure of the repair tool according to the present invention.

[Explanation of symbols]

 3 Rock drilling machine 4 Repair tool 7 Tip (cutting edge) 12 Jet port 13 Nozzle

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Takeshi Hayashi, 1528 Nakashinden, Yokoi, Kobe-cho, Anpachi-gun, Gifu Prefecture, Japan Gifu Works, Mitsubishi Materials Corp. 1528, Nakashinden, Gifu Works, Mitsubishi Materials Corporation

Claims (5)

[Claims] 1. A repairing method for removing hot metal and the like adhering to tapholes of blast furnaces, converters, etc., which is equipped with a repairing tool at the tip of a rock drilling machine capable of rotary impact drilling. A method for repairing a taphole, characterized in that the rock drilling machine is driven in a state where the tip of the hot metal is in contact with the hot metal or the like to crush and remove the hot metal or the like. 2. The repair of the taphole according to claim 1, wherein the hot metal and the like are crushed and removed while jetting a fluid for removing the crushed hot metal and the like from the tip of the repair tool. Method. 3. The liquid for cooling the repair tool is mixed with the fluid, and the liquid is discharged from the tip of the repair tool together with the fluid in a mist state. How to repair the taphole. 4. A repair tool which is attached to the tip of a rock drilling machine capable of rotary impact excavation in order to remove molten pig iron and the like adhering to tapholes of blast furnaces, converters and the like, at least the outer periphery of the tip surface thereof. A repair tool, characterized in that a plurality of cutting blades are planted in the portion, and an injection port for jetting fluid from the tip surface is provided at the planting site of these cutting blades. 5. The liquid for cooling the repair tool can be mixed with the fluid, and the liquid supplied to the injection port is atomized into the injection port together with the fluid and discharged from the tip surface. The repair tool according to claim 4, further comprising a nozzle for allowing the nozzle to be attached.