JPS5867809A - Method and apparatus for opening mud of tap hole of blast furnace - Google Patents

Abstract

PURPOSE:To open the mud fitting of a tap hole effectively in short time by a method in which a central hole and a ring like hole are formed on the mud fitting for the tap hole of a blast furnace, and a breaker is pressed on the mud fitting. CONSTITUTION:The tool holder of a tapping machine 5 is composed of a rod like protrusion 7a and an arm 76 surrounding said protrusion which are provided with blades 4, 12 respectively by way of bits 7c. A central hole 16a and a ring like hole 16b surrounding the hole 16a are cut-formed in the central part of the refractory mud fitting on the tap hole 3 of a blast furnace by the tapping machine 5. Then the mud gun body 8 provided with a dividing breaker 11 in the tip nozzle 9 is pressed on the mud fitting surface of the tap hole 3, and the mud fitting is separately broken by using the hole 16a and 16b. The operating time for breaking is reduced and the safety for operation is increased by this process.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and a device for destroying the sliding portion of a blast furnace taphole, and more specifically, the present invention relates to a method for destroying the sliding portion of a blast furnace taphole, and a device for destroying the sliding portion in front of the blast furnace taphole. It concerns a method and device for effectively destroying it.

In general, the outlet port 3 of the blast furnace 1 is constructed as shown in FIG. Therefore, in order to handle these high-temperature melts, the tap hole 3 is made of refractory material.This refractory material gradually becomes brittle when used for a long time.

In particular, the part of the opening II opening lTl4 that comes into contact with the mud gun is commonly known as "sweeping", and as this part deteriorates in the heat, it is repaired on a temporary basis. In this repair work, as shown in Figure 2, a worker enters the gutter 2 and uses a rock drill to connect it, but there are problems as listed below. .

(1) The work environment is high temperature and has a lot of dust, causing deterioration.

(2) Heavy labor.

(3) Furnace gas is leaking through the refractory joints,
- There is a risk of causing carbon oxide.

(4) When the taphole is not completely blocked.

There is a risk of the molten button blowing out.

The purpose of the present invention is to eliminate these problems.

Specifically, the present invention provides a method for breaking a taphole sliding joint by using an existing mud gun of a hole-drilling machine without a worker having to work directly, and a breaking device for use in the method.

That is, 1 the present invention forms a central opening at the taphole with respect to Table 1 - Needle nozzle of the blast furnace taphole surface, and forms an annular groove in the outer ring around the taphole. , is characterized in that the surface layer refractories of the iron outlet in this egg-shaped groove are divided and crushed in the circumferential direction.

The breaking device used therefor is attached to the end of the drill rod, and has a rod-shaped protrusion in the center that is drilled at the hole opening, and one end is fixed to the rod-shaped protrusion. A cutter base having an arm whose other end is located one circumference around the bar-like protrusion, and a hole bit and a cutting bit for groove machining are attached to the tip of the bar-like protrusion and the end of the arm, respectively; It has a rod-shaped protrusion for attaching a tap hole opening that is attached to the hole drilled by the rod-shaped protrusion of the tool rest, and a plurality of blades are provided in a radial manner on the outside thereof,
Furthermore, the blades are characterized in that a dividing and crushing tool is provided on the back surface of the blades to provide a suppressing plate for the mud gun.

The present invention will be explained below with reference to one drawing.

In addition, FIG. 3 is an explanatory view when cutting the surface layer refractory of the taphole with a blade base according to the present invention, FIG. 4 is an enlarged view of a part thereof, and FIGS. 7 is a vertical cross-sectional view and a front view of an example of a bar-shaped protrusion and an arm of a blade base, and FIGS. 7 and 8 are a vertical cross-sectional view and a front view of an example of a dividing crusher.

First, the present invention utilizes a hole drill or mud gun installed near the tap hole, cuts one piece of fireworks on the tap hole surface with a blade base, and then crushes it with a dividing and crushing tool. Therefore, destruction operations consist of two processes: cutting and crushing.
in fact.

Each operation takes about 3 minutes and 1 minute at most, and the total time is about 4 minutes, and the sailing and mouth-joining parts can be destroyed extremely efficiently.

That is, as shown in FIGS. 3 and 4 [4].

As shown in FIGS. 5 and 6, the knife base 7 consists of a rod-shaped protrusion 7a at the center and an arm 7F around it.The rod-shaped protrusion 7a protrudes from the center, and one end of the arm 7b is a rod-shaped protrusion. A portion 7aK* is attached, and each arm 7b is curved so that each other end is positioned on the circumference of the rod-shaped protrusion 7a and the center. Further, the bar-like protruding portion 7aK is attached with the cutter 4, and at the same time, the cutter 12 is attached to the other end of each arm 7b, and furthermore, a screw 13 is formed on the back surface of the cutter base 7, and the screw 13 is attached to the shedding machine. The ends of the rods 6 are screwed together for connection.

A cooling passage 14m is formed along the central axis of the dovetail protrusion 7a for cooling during drilling, and at the same time a cooling passage 14m is formed along the central axis of each arm 7b. , through 14b1.

Cooling liquid or gas blowout.

Further, the cutter 4 can be attached directly to the bar-shaped protrusion 7a4C, but normally, it can be attached via a bit 7c. A screw hole 15 is formed on the back surface of this pin 7c, and the screw hole 15 is screwed into the tip of the bar-shaped protrusion 7&, and the cutter 4 is further provided with a cooling passage 14c so as to be able to be purged.

Furthermore, when each arm 7b is attached to the bar-shaped protrusion 7aK, each arm 7b may be attached by fitting into the tapered part of the bar-shaped protrusion 7a with a metal touch, and each cutter 4.12
can be overlaid with a sprite or the like to a diameter of about 10 to 15φ, or can be press-fitted with a piece of cemented carbide.

In this way, when the rotational force of the hole puncher 5 is transmitted to the blade base having the above configuration, a center hole 16a is cut at the center of the sliding portion of the gun outlet, and a ring-shaped hole 16b is cut around the center hole 16a. When pressed with a dividing crusher as described later, it can be effectively crushed.

That is, the dividing crushing tool is guided by the central aperture 16a in the center as described later, and the ring-shaped opening 16b around one periphery ensures a gap for crushing by the dividing crushing tool, so that effective crushing can be achieved.

Next, as described above, the center opening 16a is opened using the blade base 7.
and a ring-shaped opening 16b.

Thereafter, as shown in FIG.
is usually pressed against the mating surface of the opening with a pressure of 20 to 30 tons. When pressed in this manner, the sliding portion inside the ring-shaped opening 16b is divided into 2 to 4 parts, and can be broken easily and in a short time. As shown in FIG. 7, this dividing and crushing tool 11 has a center guide 18 protruding from the center of the disk 17 through the disk 17 to the tip nozzle 9 of the mud gun 8. Crushing tool 1 divided radially from
1 is disposed, and a blade 11b is formed at the tip of each divided crushing tool 11 by hardening.

Therefore, during crushing, the center guide 18 is inserted into the center opening 16a.
By charging the divided crushing tool 11 with eight mud guns, it is possible to easily destroy the sliding parts.

As described above, in the present invention, a hole punch is used to form a center hole and a ring-shaped hole in the sliding part in advance, and then a mud gun is used to press a dividing crushing tool to destroy the part. Therefore, it can be destroyed in about 4 minutes.

In the conventional example, it took about 30 to 45 minutes, but not only can this time be significantly shortened, but also safety can be greatly improved.

[Brief explanation of the drawing]

Figures 1 and 2 are explanations M showing the opening work of a blast furnace taphole, and Figure 3 is an explanatory diagram of Table 1 - Cutting refractories of the taphole with a blade base according to the present invention. 4 is an enlarged view of a part thereof, FIGS. 5 and 6 are a longitudinal sectional view and a front view of an example of the rod-shaped protrusion of the blade base and the arm, and FIGS. 7 and 8 are The figures are a longitudinal sectional view and a front view of an example of a dividing crusher. Code 1...Blast furnace 2...Output & gutter 3...Outlet port 4...Knife 5.
...Drilling machine 6...Rod 7...
...Knife base 7a...Bar-like protrusion 7b...Each arm 7C...Bit 8...
・Mud gun body 9...Tip nozzle] 0...Mud 11...Divided crushing tool 11b...Blade 12...Blade 13-
--- Screws 14 a, 14 b, 14 c --- Cooling passage 15 --- Threaded hole 16 JL --- Center hole 16 b --- Ring-shaped hole 17 --- Circular plate 18 --- ...Center guide Patent issuer Kawasaki Ayo Co., Ltd. Agent Patent attorney Yoshikatsu Matsushita Patent attorney Hitoshi Suzuki Figure 1 Figure 2 Figure 3 Rod Figure 4

Claims (1)

[Claims] 1) A center opening is formed at the 10th point of the surface layer refractory of the blast furnace pile and 10 sides. A tapping furnace characterized by forming an annular groove in the outer ring around the tap opening, and then crushing the refractory by dividing it in the circumferential direction. How to destroy the sliding joint: 2) Destroy the bar-shaped protrusion that is installed at the end of the hole puncher and drilled at the iron exit in the center. and a cutter base having an arm having one end fixed to the rod-shaped projection and the other end positioned on a circle centered on the rod-shaped projection; Each of the holes has a hole bit and a cutting bit for groove machining, respectively, and has a rod-shaped protrusion for attaching a taphole hole, which is attached to the hole drilled by the rod-shaped protrusion of the tool post, and a rod-shaped protrusion on the outer periphery thereof. A sliding part of a blast furnace taphole characterized in that a plurality of blades are provided in a radial manner, and a dividing crushing tool is further provided on the back of these blades for arranging a suppressing plate of a mud gun.
゛ Destructive device.