JPS5843387A - Device for repairing furnace wall of shaft furnace - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for repairing damaged parts of blast furnace wall bricks.

Blast furnace wall bricks are subject to damage such as abrasion and falling off during operation.

The rounding causes operational and shell maintenance problems. Soζ
In order to repair the bricks in the damaged area, conventionally the ore stock line in the furnace was lowered (reduced in length) to a position where the damaged area of the furnace wall could be seen, the air was rested, and the bricks were placed diagonally opposite the damaged area. Insert a nozzle that is longer than the installed manhole (for example, a rounded nozzle of approximately 15nO, which is brought to a point where the tip of the spray nozzle is approximately 800mPt1lK from the damaged area) into the furnace.In addition, position the nozzle tip. Attach a 9-year chain to the nozzle for use and tip support, and support it from outside the furnace through the upper manhole.Inside, the above-mentioned wire and chain are used to control the nozzle in the vertical direction with a chain block during the line winch. This is to control the horizontal direction by attaching a wire, chain, or other object that can be used in the tensile direction to the horizontal control J&- in the same way as above.

These wires, chains, etc. are then winched. Conventional systems use a long nozzle and the tip is pulled by the wire, chain, etc., so the tip of the wire, chain, etc. It was not possible to completely prevent wobbling, which made it difficult to spray accurately at the target position. Moreover, since the long nozzle is inserted diagonally into the furnace, there is a drawback that only one spray nozzle can be used.

In addition, generally the blast furnace maintenance day and time is about 12 hours, and if the spraying capacity is 2T/)i, the possible spraying time is 6 hours.
The limit is to spray X2.0T/1=12TO monolithic refractory, and even if the adhesion efficiency is 50-, the repaired part K1-16
If TL is not sprayed and the amount of refractory used (bulk specific gravity) is 2T//, then 6T÷2T/IF=3m'
Option 3 - Although damage to bricks of 3 or above cannot be repaired during normal maintenance hours, f! Large manholes of approximately 380G- to f61,000■ are required at at least 4 locations around the circumference, making it virtually impossible to open in some blast furnaces, and
1 [, ``b*kbw:y*-'' has sufficient work space.
It was necessary to

The present invention eliminates such conventional drawbacks, and in order to repair the blast furnace wall, an extension is provided in the vertical direction from the manhole at the top of the blast furnace to the area that requires repair, and the spray nozzle is connected to the blast furnace. This system allows repairs to be carried out at any location by running the vehicle along a track installed around the area. An embodiment of the present invention will be described in detail below with reference to FIG.

The figure is a schematic diagram showing an embodiment of the blast furnace wall O repair apparatus of the present invention. In II, 1 is a plurality of cylindrical bodies 1a-
1. A refractory spray nozzle that is expandable and retractable and has a nozzle opening at the lower end. This spray nozzle 1 has a frame 2
A roller 3 □ 3t, which is held vertically and attached to the frame 2, runs along a track 61 disposed in the blast furnace above the manhole 5 in the top 4 of the blast furnace. It is K so that it can turn on top of the plane. A traveling mechanism (for example, a traveling motor 7 is used to reduce the speed reduction mechanism 8 at 1-1) is attached to the traveling movement frame 2 for this turning.
・ Via 9-u-31? , take the initiative to turn the spray nozzle 1 into a turning gate! A rotating mechanism, such as a motor, is driven via the chain 10. On the other hand, a lifting mechanism, such as a winch, for elevating and lowering the nozzle opening by extending and contracting the 11 cylindrical bodies 1a to 1. The nozzle 1 expands and contracts in the vertical direction, freely extends through the manhole 5 to the position where spraying repair is to be performed, and is positioned above the manhole 5 at the shortest time. Each of these driving devices is arranged in the frame 2, and the spraying section is operated by remote control from a position where the operator can observe the spraying section. Note that 12I is the furnace body bracket and 12 is the charging floor deck.

In this way, the nozzle opening can be accurately and easily moved to the repair position. Note that the telescopic nozzle can be of water-cooled or air-cooled type depending on the ambient temperature.

As described in detail above, according to the present invention, accuracy with respect to the repair target is improved, and moreover, it is possible to spray repair a large amount of property within the typical wind down period, which allows installation of a plurality of machines. In addition to existing manholes, this is a schematic configuration diagram that aims to have the effect of allowing spraying to be performed through small-scale steel shell openings.

1... Spray nozzle, 2... Frame, 3. ．． 3.・・・
・Roller, 4... Top of blast furnace, 5... Manhole, 61"□... Track, 7... Travel motor, 9...
・Swivel motor, 10... chain, 11... winch.

Patent applicant: Sumitomo Metal Industries, Ltd. Agent 1) Yoshihisa

Claims (1)

[Claims] A blowing nozzle consisting of a plurality of cylindrical bodies that is extendable and retractable, and the blowing nozzle is held vertically and runs on a track placed above the top of the furnace and in the #1I position of the furnace. A traveling mechanism for moving the spray nozzle and 9 for moving the spray nozzle.
It has a rotation mechanism and a lifting mechanism for raising and lowering the tip of the nozzle.1 By shortening the spray nozzle body to the shortest dimension, it travels along the lie of the blast furnace along the track and sprays from the manhole to the position that requires repair. Blast furnace wall repair device that allows you to freely select the nozzle tip