KR20010063899A - A supplementary device for closing the tap hole of the blast furnace - Google Patents

Abstract

PURPOSE: An apparatus for maintaining the instant airtightness during closing of a tapping hole is provided to reduce manufacturing cost of hot metal by preventing the outflow of refractory materials and decreasing the waste of expensive refractory materials during closing of the tapping hole, and reduce surface cleaning load before closing of the tapping hole and prevent closing failure, thereby improving productivity. CONSTITUTION: In a supplementary device (20) for closing a tapping hole mounted on the front tip part of a mud gun closing the tapping hole of a blast furnace using a mud material, the supplementary device for closing a tapping hole comprises a compression member having a hollow part through which the mud material flown out through a tip part of the mud gun is penetrated and flown, and a joining surface joined to the tapping hole surface from the front of the hollow part; and a paper sleeve (21) inserted into and coupled to the hollow part of the compression member and compressed and inserted into the inner side surface of the front tip part of the mud gun, thereby preventing the compression member from being seceded from the front tip part of the mud gun.

Description

A supplementary device for closing the tap hole of the blast furnace}

The present invention relates to a closing aid mechanism capable of closing the exit port without leaking mud material without removing the present in the state where it is attached, such as slag, which is a melt residue, on the exit port for discharging the melt in the furnace from the blast furnace. In detail, when the exit port is urgently closed, it is attached to the tip of the mud gun and instantaneously crushed while filling the gap between the exit port and the mud gun's tip without any external leakage of the mud material, and then crushed to maintain confidentiality. To an exit closure subsidiary device that can be used.

In general, as shown in FIG. 1, the melt 11 in the blast furnace maintained in a mixed state of pure molten iron and slag is discharged to the outside of the blast furnace through four outlets 10 at predetermined time intervals. After being discharged to the raceway 13 along the large hot water road 12, and then repaired to the tugboat 15.

At this time, the characteristics of the discharged melt 11 is discharged to the melt melted water 12 through the tap opening with a constant pressure (4KG / ㎠).

On the other hand, the circumferential direction in which the tap hole 10 is located is called a tap hole surface 10-1, and when the molten material that is drawn through the tap hole is scattered in all directions and attached to the tap hole surface 10-1, it is now in a dendritic form. Is attached.

In this way, when the starting work is completed at one of the four outlets, in order to close the outlets, as shown in Figure 2, after filling the refractory material called mud material in the mud gun 30, When the mud material is pushed into the tap opening 10 through the cylinder of the mud gun 30 located at the tap opening surface 10-1, the flow path of the discharged melt is blocked by the mud material.

Thereafter, the molten fly ash in the dendritic form attached to the tap-out surface 10-1 is removed, the amorphous refractory is mixed appropriately with water, and then applied to the tap-out surface with a predetermined thickness to carry out a molding work in the same form as the tap-out surface. Closing the exit port is completed through the firing process at a high temperature of about 500 ° C. to 600 ° C., which is a self-heat that is always generated on the exit port surface.

In addition, during normal operation, the refractories of the exit opening 10 are excavated and dismantled and rebuilt into new refractories during regular repairs, which are repeated at intervals of 12 weeks, and the joint surface of the exit opening 10 is partially used during normal operation. If it is eliminated, it must be repaired (molded) with an amorphous refractory to discharge the melt.

However, when closing the exit port 10 as described above, especially when urgently closing the exit port with the mud gun, if the exit port 10-1 remains in a poor state, the following problem occurs. .

First, referring to FIG. 2, when the melt discharge in the furnace is completed, the outlet 10 is closed by filling the refractory using the mud gun 30, wherein the amount of the refractory is entirely into the outlet 10-2. Since the mud ash leakage that leaks out without filling (16) occurs, it is limited to one time and the molten fly-off leaks to the outside with high temperature wind. As a result, dust and blind gases cause environmental pollution and gas poisoning risks of workers, and if the pressure of the wind that is blown into the blast furnace is still inevitable, the reduction of the blast furnace charter is inevitably accompanied.

Second, if a leak occurs (hereinafter, leaked) to the poor joint surface between the exit port and the mud gun, the unit will be increased due to the loss of the refractory, and the depth of the door 10 will not be formed. It is also accompanied by a problem that the temperature of the outlet 10 is lowered, and since the outlet is not completely closed, the hassle of having to perform the same work again makes the blast furnace work difficult.

The present invention has been made in order to solve the conventional problems as described above, when the molten fly-products are attached to the exit port surface, or when trying to emergency closing the exit port in a bad state due to the refractory dropping of the exit port surface. In order to reduce the cost of charter manufacture by preventing the leakage of refractories at the time of closing the outlet, it is possible to reduce the cost of charter manufacturing. Its purpose is to improve productivity, which can prevent reductions and closures.

According to the present invention, in order to achieve the above object, the mud gun (MUD GUN) for closing the exit port is to be mounted, and the sawdust and wood pieces, which consider the characteristics of the exit port surface by mixing in a certain ratio, pressing The purpose of this invention is to provide a chasm hermetic holding device manufactured through the 7-step process by providing the tensile strength within the range that can protect the exit port when closing through the step and the closing aid mechanism to prevent the leakage of mud material when closing the exit port. There is this.

1 is a view schematically showing the state immediately before closing the exit mud gun outlet according to a conventional embodiment.

Figure 2 schematically shows that the mud material is leaked when closing the exit in the conventional UNBALANCING state.

Figure 3 is a perspective view of the exit closure auxiliary mechanism according to an embodiment of the present invention.

4 is a cross-sectional view taken along the line A-A shown in FIG.

5 is a view showing a state before the outlet opening auxiliary mechanism according to an embodiment of the present invention is mounted to the mud gun tip.

Figure 6 is a view showing a state in which the mud gun tip portion that is equipped with the exit closing aid mechanism is pressed the exit port in accordance with an embodiment of the present invention.

<Description of Symbols for Major Parts of Drawings>

20: closed auxiliary mechanism

21: paper sleeve

21-1: Retention Clip

21-2: Insertion guide part

30 mud gun body

34: Mud Gun Nozzle Tips

40: new home

41: pore

Hereinafter, a preferred embodiment of the present invention with reference to the accompanying drawings as follows, the same configuration adopts the same reference numerals.

First, the outlet closure auxiliary apparatus according to the embodiment of the present invention is mixed with sawdust and wood chips in a ratio of about 70:30, then using the bond to increase the adhesion of the mixture and dry it at room temperature. Then, the dried product is pressed and molded into a shaped article of a predetermined shape. Thereafter, it is manufactured by drilling into a taphole size to form a taphole surface and joining the paper sleeves.

Due to the nature of the molten deposit on the exit surface, the sawdust and particle size of wood that can be incinerated and pulverized at the radiant heat 500 ~ 600 ℃ generated by absorbing the impact momentarily and filling the pores of the irregular exit surface are generated. It is produced by pressing wood chips.

That is, it is used as an adhesive to give adhesiveness when pressing sawdust and wood chips by mixing the sawdust and wood chips in a desirable ratio (70:30) in a cylindrical frame with a thickness of about 50mm to match the external shape of the exit port. After spraying and mixing the bond (adhesive), let dry at room temperature for a certain time.

When drying at room temperature is completed, make a round disc by pressing the mold with a certain pressure to fit the outside diameter of exit port.

At this time, the pressure to be compressed should be at least lower than the strength of the tap surface. The reason is that it may damage the exit surface fired by the amorphous refractory material.

At this time, the pressure to be compressed should be at least lower than the strength of the tap surface. The reason for this is that the tap-off surface fired by the amorphous refractory material can be damaged. The production range of the preferred tensile strength is limited to within 100 ~ 110 kg / ㎡.

The round disc manufactured through the above process, that is, the outlet opening mechanism 20 is drilled to the same diameter as the inner diameter of the outlet as shown in FIGS. 3 and 4 to form a hole. It is then processed into the same shape as the tap hole surface. In addition, looking at the side of the round disc, because the wood chips and sawdust is in a mixed state, the pores that can be stretched is automatically formed.

In the lateral central portion, when squeezed between the first hermetic holding portion and the second hermetic holding portion, expansion grooves are formed in the circumferential direction in order to solve an unbalanced force on the pressing strength.

A paper sleeve 21 for inserting the processed exit surface airtight holding plate, that is, the exit opening closing assistance mechanism 20 into the nozzle tip portion of the tip of the mud gun 30 of the exit port is attached.

When the paper sleeve 21 is inserted into the nozzle tip portion 34 of the mud gun 30, a conical insertion guide portion 21-2 is formed at the tip thereof so that the paper sleeve 21 is not prevented from being inserted smoothly by foreign matter. Is formed.

The paper sleeve 21 and the hermetic holding plate 20 are fixed in four places in the diagonal direction so as to prevent the paper sleeve 21 and the hermetic holding plate 20 from being separated from each other.

Hereinafter, it will be described through an embodiment in which the outlet chala hermetic holding device manufactured as described above, that is, the outlet closing auxiliary mechanism 20 is mounted on the outlet mud gun 30 and used.

That is, with reference to Figures 5 and 6, the starting point at the exit is urgently closed due to the operating conditions or normal end point to try to block the melt flow path of the exit through the mud gun (30).

At this time, the mud gun mud material is moved to the closed stand-by position while the mud material is added, and then removes the foreign matter of the nozzle tip 34, which is the tip of the mud gun.

When the foreign matter is removed, the paper sleeve 21 is inserted into the front end of the mud gun 30 so as to be mounted to the front end of the mud gun 30.

After confirming that there is no abnormal shaking or deflection, the final mud gun (30) operator checks the monitor (not shown) in the remote cab and looks at the monitor (not shown). (Not shown).

In this way, even if the mud material at the tip of the nozzle and the mud gun 30 nozzle tip, the exit surface is irregular, check whether the mud material does not leak to the outside and proceeds well inside the exit port and ends.

At this time, if the outlet airtight holding device can explain how to prevent the leakage of mud material between the peripheral surface of the outlet and the mud gun tip, when closing the outlet 10, the mud gun 30 by hydraulic At the moment of being squeezed to the outlet bonding surface 10-1, the dropout portion of the outlet bonding surface 10-1 or the dendrite portion attached to the melt when the melt is discharged is removed from the outlet closing assistance mechanism 20. As the moment is crushed to fill the space of the irregular pores to form a dense hot tissue.

At this time, the sawdust and the wood carving material of the exit closure auxiliary mechanism 20 automatically performs a sealing role and is incinerated in about 5 to 6 minutes by the radiant heat 500 ~ 600 ℃ of the exit port (10).

In this way, the mud material inside the mud gun enters through the exit port, and the mud material 14 inside the mud gun 30 is completely filled into the exit port 10-2 without flowing out to the outside and the protective wall 10 in the furnace 10 -3).

According to the present invention, the effect obtained at the time of emergency use when the connection point of a tap opening is bad (with a melt, a surface irregularity refractory fall-off). Prevents mud ash spillage when closing the exit,

1. It can eliminate the repeated closing operation of the exit port, and can reduce the worker's workload.

2. You can reduce the cost of chartering by preventing the leakage of mud materials.

3. As the protection wall inside the blast furnace is sufficiently formed, the time required for departure is long, which reduces the use of materials by reducing the number of departures.

4. It can contribute to productivity improvement and cost reduction by safe old work by securing the inner depth by completely filling the exit port with no refractory.

The foregoing is merely illustrative of the preferred embodiments of the present invention and those skilled in the art to which the present invention pertains may make modifications and changes to the present invention without departing from the spirit and gist of the invention as set forth in the appended claims. It should be recognized.

Claims (2)

In the mechanism that is attached to the distal tip of the mud gun that uses the mud material to close the exit of the blast furnace, A crimping member having a hollow portion through which the mud material flowing out through the tip portion of the mud gun flows, and a joining surface joined to the exit port surface in front of the hollow portion; Outlet closure assistant characterized in that it is inserted and coupled to the hollow portion of the pressing member and pressed against the inner surface of the tip portion of the mud gun to prevent the pressing member from being separated from the tip portion of the mud gun Instrument. According to claim 1, wherein the crimping member, the exit closure auxiliary mechanism, characterized in that the sawdust and wood chips are mixed in a mixing ratio of 70:30.