KR20020048161A - Making apparatus of protective wall for tapping hole - Google Patents

Abstract

PURPOSE: An apparatus for forming a protective wall of a tap hole is provided which is capable of promptly repairing the tap hole in the safe state using an exclusive repairing equipment. CONSTITUTION: In a closing machine(3) filling the tap hole with a mud material so as to close a tap hole formed in an iron notch of a blast furnace, the apparatus for forming a protective wall of the tap hole comprises a ring shaped sleeve(10) having an appropriate thickness which is coupled onto the outer circumferential surface of a tip(3a) equipped at the closing machine(3) so as to form the protective wall; flanges(20) which are formed on the outer circumferential surface of a nozzle connecting the closing machine(3) with the tip(3a) so as to fix a plurality of spiral fixing rods(11) formed at the rear of the sleeve(10), and which are locked to nuts(12) by means of elastic springs(13); a resting ring(30) which is slidingly connected onto the outer circumferential surface of the sleeve(10) so as to maintain the mud material in a block shape as preventing flying of the mud material when filling the mud material into the tap hole for repairing the tap hole; and slots(31) which are formed on the resting ring(30) so that the slots(31) are coupled to screw grooves(14) formed on the sleeve(10) by a fastener(32), and which limit a sliding distance of the resting ring(30).

Description

Making apparatus of protective wall for tapping hole}

The present invention relates to an outlet protection wall forming apparatus, and more particularly, a dedicated mechanical facility is provided to effectively manage the tap hole surface, which is the junction surface of the closure and the exit port, when the molten melt is discharged out of the furnace and then closed. By using the present invention relates to a protective wall forming apparatus that can easily form a protective wall during maintenance work.

In general, the blast furnace operation is to charge the iron ore and coke from the top of the blast furnace to burn the coke with the hot air sent from the tuyere to dissolve the iron ore and the iron ore melt is accumulated in the bottom of the blast furnace, the sealed exit The precursor is opened in an opener to discharge the melt and then sent to the next process.

Opening operation of the exit port, by mounting the excavation bit to the opening hole excavation hole to fix the end of the bit to be located in the front center of the exit port, and then drills through the exit port while rotating and hitting the bit The melt is discharged.

In addition, the excavation allowance portion of the outlet is formed in a cylindrical shape is filled with a high density mud (MUD) clay, that is, refractory to the inside to close the outlet by firing.

In this case, as shown in FIGS. 1 and 2, when closing the outlet 2 of the blast furnace 1, the tap hole surface 2a, which is a portion where the outlet and the closing device 3 contact, is lost, and thus the closure of the outlet may be poor. In this case, the leakage of the mud material, which is a refractory material for closing the outlet, leaks out between the tab hole surface 2a and the closure tip 3a.

When the above phenomenon occurs, the worker kneads the cotton repair material (4; refractory material) with water to perform the surface repair work of the tap opening by hand. The tap hole surface repair work is carried out by pressing and firing the surface repair material attached to the surface.

However, in front of the tap hole surface 2a, which is the tap-contact point, the upper part of the large bath 5, where the melt of about 1,520 ± 10 ° C is constantly standing, is placed, so that the gas is generated around 150-180 ° C. And the poisonous gas having a CO concentration of 21% or more contained in the flame may cause an accident in which the melt of the large hot water falls to the remaining site regardless of the intention of the worker.

In addition, even when workers wear alumina heat-resistant suits and protective hoods due to the high temperature working environment, it is difficult to access them directly, so it takes a long time because 3-4 people work alternately. The refurbishment for repairing the exit port has to be decomposed due to the loss of adhesion due to the evaporation of water, so it has to be re-attached, thereby reducing the refractories, delaying the working time, shortening the life of the joint surface, and increasing the work load.

The present invention has been made in view of the problems caused when closing the conventional exit port as described above, the purpose is to use a dedicated repair facility, the exit port protective wall forming apparatus that can quickly repair the exit port in a safe state To provide.

In order to achieve the above object, the present invention provides a sleeve having a suitable thickness that is coupled to the outer peripheral surface of the tip of the closure to fill the mud material for closing the tap hole formed in the blast furnace opening, and forms a protective wall, and at the rear end of the sleeve. A flange formed on the outer circumferential surface of the nozzle connecting the closure and the tip to fix the plurality of fixing rods having the formed spiral, and is slidably coupled to the outer circumferential surface of the sleeve for the repair of the exit port. It consists of a seating ring to maintain the block shape while preventing the dispersion of the mud material when filling the mud material, and a long hole is coupled to the screw groove formed in the seating ring with a fastener and limit the sliding distance of the seating ring This prevents safety accidents occurring during work and prevents leakage when closing the exit. It performs smoothly and smoothly the supply of molten iron to the next process, it is characterized by maximizing the work surface repair work of the exit.

1A and 1B are a perspective view schematically showing a state of repairing a tap hole in a conventional exit port and an enlarged configuration diagram thereof;

Figure 2a and 2b is an exploded perspective view and a coupled state cross-sectional view showing the outlet repair equipment of the embodiment of the present invention,

Figure 3a and 3b is a cross-sectional view showing the operating state of the outlet repair equipment.

<Description of Symbols for Major Parts of Drawings>

3: closure 3a: tip

10 sleeve 11 fixed rod

12: nut 13: elastic spring

14: thread groove 20: flange

30: seating ring 31: long hole

32: fastener

Hereinafter, the outlet opening protective wall forming apparatus of the present invention will be described in detail with reference to the accompanying drawings.

2A and 2B are separate perspective views showing the outlet repair equipment according to the embodiment of the present invention, and FIG. 3A and 3B are cross-sectional diagrams illustrating an operating state of the outlet repair equipment, and for closing the tab hole. On the outer circumferential surface of the tip 3a provided in the closing device 3, a sleeve 10 having an appropriate thickness to form a protective wall is coupled, and a plurality of fixed rods 11 having a spiral formed at the rear end of the sleeve 10 are formed. It is formed integrally, but is fixed to the flange 20 formed on the outer circumferential surface of the nozzle 3b connecting the closure 3 and the tip 3a with the nut 12 through the elastic spring 13.

The outer ring of the sleeve 10 is slidably coupled to the seating ring 30 to maintain the block shape while preventing the dispersion of the mud material when filling the mud material for repair of the exit port, the seating ring 30 Long hole 31 is formed therein to limit the sliding distance, but is coupled to the screw groove 14 formed in the sleeve 10 corresponding to the long hole 31 by a fastener 32 formed with a handle or a head for a tool have.

At this time, the front end surface of the sleeve 10 is preferably to form an inclined surface (T) so that the protective wall can be formed at an angle of 45 ° with respect to the inner peripheral surface of the seating ring 30 coupled to the outer peripheral surface.

Therefore, the present invention as described above is to close the tip (3a) of the tap hole closure (3) when repairing the tap hole surface around the outlet after the closing operation of the outlet, the sleeve 10 is installed on the outer peripheral surface of the tip When the fixing rods 11 formed at the rear end thereof are fixed to the flanges 20 formed on the outer circumferential surface of the nozzle 3b, they are subjected to the elastic force of the elastic springs 13 interveningly installed, thereby enhancing the cushioning action and the adhesion. do.

Since the seating ring 30 installed on the outer circumferential surface of the sleeve 10 is protruded forward as much as possible before the tip 3a of the closure 3 is brought into close contact with the tab hole surface, the seating ring 30 by the close action. The tip of the retracted contact with the tab hole surface to form a closed space to surround the tip of the sleeve.

Therefore, the mud material supplied through the nozzle tip of the closing device is filled in the closed space formed by the front end of the sleeve 10 and the seating ring 30, so that the mud material filled in the tip hole maintains a block shape.

As described above, the tap-out protective wall forming device of the present invention prevents the accidental leakage of molten steel through the tap-out and prevents the work load and the safety accidents generated by the tap-hole repair work. Of course, there is an effect that can significantly contribute to the extension of life and normal operation of the tap hole surface.

Claims (1)

In the closing device (3) for filling the mud material for closing the tap hole formed in the blast furnace opening, the sleeve having a suitable thickness is coupled to the outer peripheral surface of the tip (3a) provided in the closure (3) to form a protective wall (10) and the elastic spring formed on the outer circumferential surface of the nozzle (3b) connecting the closing device (3) and the tip (3a) to fix the plurality of fixing rods (11) having a spiral formed at the rear end of the sleeve (10) 13) is coupled to the flange 20 fastened by the nut 12 and the outer peripheral surface of the sleeve 10 so as to be slidable to prevent the dispersion of the mud material when filling the mud material for repair of the exit opening Sliding distance of the seating ring 30 and the seating ring 30 to be retained in form, the coupling ring 32 is formed in the seating ring 30 is provided in the sleeve 10 provided in the sleeve 10 Outlet protective wall forming apparatus, characterized in that configuration including a long hole (31) to limit.