JPS5935557Y2 - Blast furnace inner wall repair equipment equipped with a rotating chute charging device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an inner wall repair device for repairing worn parts of the inner wall refractories of a blast furnace equipped with a rotating chute charging device by spraying refractory material thereon.

Generally, when a blast furnace is operated for a long period of time, the inner wall refractories are worn out due to friction with the charged raw materials, etc., and the heat load that the shell receives increases accordingly, so the wear and tear of the inner wall refractories shortens the lifespan of the furnace. This is one of the major deciding factors.

In order to extend the service life, it has become common practice to expose the worn parts of the inner wall by reducing the length of the pipe, take a break (stop blowing air), and then spray refractory material on the worn parts to repair them.

For example, Japanese Patent Application Laid-Open No. 54-26203 filed by the present applicant,
54-77207 is known.

This invention has been further developed to shorten the wind down time as much as possible by using a rotating chute type charging system that can be easily installed and removed in a short period of time, and that allows for accurate spraying on areas that require repair. The present invention provides a blast furnace inner wall repair device equipped with the device.

The present invention will be explained in detail below with reference to the drawings.

In the blast furnace 1 equipped with a rotating chute-type charging device, the rotating chute (not shown) for charging materials at the top of the furnace is subject to severe wear, so it must be frequently replaced or repaired.
It is normal to have a replacement device 2 on hand.

The present invention is based on this replacement device 2 and the rotating device 3 of the rotating chute.
This is to make effective use of the information.

In the present invention, the rotating chute of the rotating vertical chute 4 from which the rotating chute has been removed is mounted on the mounting part 5 by carrying the cylinder 6 through the manhole 7 using the changing device 2.

The cylindrical body 6 is provided with a slit-shaped opening 22 in the vertical direction as shown in FIG.

Inside this cylindrical body 6, there is provided an elevating cart 8 that can be raised and lowered up and down along the inner surface of the cylindrical body 6, and this cart 8 is provided with a refractory material spray nozzle 20. 20 moves up and down through the slit-shaped opening 22 of the cylinder body 6.

For example, as shown in the figure, a carriage 8 is connected to wires 10 and 11 that are moved up and down by a winch that can be rotated forward and backward, and the carriage 8 is raised and lowered within the cylinder body 6 as the wires 10 and 11 move, and a spray nozzle 20 provided on the carriage 8 is connected to the carriage 8. is raised and lowered through the slit-shaped opening 22 of the cylinder 6.

The cylindrical body 6 with the slit-shaped opening can be divided into lengths that are easy to handle and can be used by adding them.

The present invention configured as described above can accurately follow the worn portion 15 of the blast furnace inner wall refractory 14 by the rotating device 3 in the circumferential direction and by the wire sheave mechanism in the vertical direction.

For repairing by spraying fireproof material, compressed air and fireproof material are supplied from a hose 16, and water is supplied from a hose 17.

These are mixed at the position M through the pipes 18 and 19, and the water content is adjusted appropriately and sprayed from the nozzle outlet 23 toward the area requiring repair.

Note that 21 in the figure indicates a pulley. Also wire 10.11
is connected to the trolley 8 through the rotating vertical chute 4, and the hoses 16 and 17 are also connected to the pipe 1 through the vertical sheet 4.
Connected to 9.18.

As described above, the present invention effectively utilizes the rotating device and replacement device of the rotating chute of a blast furnace equipped with a rotating chute type charging device, so it has the effect of being able to accurately repair the blast furnace inner wall with a compact device. Furthermore, it can be installed and removed in an extremely short time, contributing to shortening downtime.
Therefore, it has a great effect on stabilizing the furnace condition.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view showing a schematic structure of the present invention, Fig. 2 is a partially enlarged partial cross-sectional view of Fig. 1, and Fig. 3 is a cross-sectional view taken from Fig. 2 A-A.
FIG. 1...Blast furnace, 2...Swivel chute replacement device, 3...Swivel chute drive device, 4...
... Vertical chute, 5 ... Swivel chute attachment part, 6 ... Cylindrical body, 7 ... Manhole,
8... Lifting trolley, 9... Winch, 1
0, 11... Wire, 12... Weight, 13... Wheel, 14... Inner wall refractory, 15... Worn part. , 16.17...Hose, 18.19...Pipe, 20...
・Blowing nozzle, 22...Slit-shaped opening, 23
...Nozzle spout.

Claims (1)

[Scope of utility model registration request] Inside a cylindrical body having a slit-shaped opening in the vertical direction, which is suspended from the chute rotating device of the rotating chute type raw material charging device,
A lifting body that can be raised and lowered along the inner surface of the cylinder is provided, a refractory material spraying nozzle is provided on the lifting body, and the nozzle moves up and down the slit-shaped opening of the cylinder as the lifting body moves up and down. A blast furnace inner wall repair device equipped with a rotating chute charging device.