KR100419771B1 - A supplementary device for closing the tap hole of the blast furnace - Google Patents

Abstract

The present invention is attached to the tip of the mud gun when the exit of the blast furnace is urgently closed and is crushed while filling the gap between the exit port and the tip of the mud gun instantly filling the gap between the now and the irregular exit port without the external leakage of mud material. The outlet closure auxiliary mechanism that can be maintained, the outlet closure auxiliary mechanism is a hollow portion through which the mud material flowing through the tip portion of the mud gun flows through, and a joint surface joined to the outlet port surface in front of the hollow portion Compression member having a and is inserted and coupled to the hollow portion of the pressing member and is pressed into the inner side of the tip portion of the tip of the mud gun is made of a paper sleeve for preventing the pressing member from being separated from the tip of the mud gun Therefore, molten fly ash or the like is attached to the exit surface, or When due to the spherical surface of the refractory eliminated, such as emergency and closed the Department of pioneering poor state party, and charters can reduce manufacturing costs by reducing waste of expensive refractories and at the same time preventing the outflow of refractory City Department pioneering closed.

Description

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

The present invention relates to a blast furnace exit opening and closing mechanism that can close the exit port without leaking mud material without removing it in the present state such as slag, which is a melt residue, on the exit surface for discharging the melt in the furnace from the blast furnace. In more detail, when the exit port is urgently closed, it is attached to the tip of the mud gun and instantly crushed while filling the gap between the exit port and the mud gun's tip without any external leakage of the mud material. It is related to the exit closure auxiliary mechanism that can maintain.

Generally, as shown in FIG. 1, the melt 11 of the blast furnace 11 in which molten iron and slag are mixed is discharged to the outside through four outlets 10 at predetermined time intervals. Is discharged to the raceway 13 along the repair boat 15 is repaired.

At this time, the melt 11 to be discharged is discharged to the melt water flow 12 through the tap opening 10 at a constant pressure (4Kg / ㎠).

On the other hand, the circumferential direction in which the tap hole 10 is located is the tap hole surface 10-1, and molten matter scattered in all directions through this tap hole is attached to the tap hole surface 10-1 to become a dendritic shape. .

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

After that, the dendritic shape adhering to the tap-out surface 10-1 is removed, and the irregular refractory mixed with water is applied to the tap-out surface at a predetermined thickness, and the molding operation is performed in the same form as the tap-out surface. At this time, the tap hole surface is fired by a high temperature of about 500 ° C. to 600 ° C. which is its own heat to close the tap hole.

In addition, during normal operation, refractories of the tap-out port 10 are excavated and dismantled during regular repairs, which are repeated at intervals of 12 weeks, and new refractories are rebuilt to be used after drying. In addition, if the joint surface of the outlet 10 is partially dropped during operation, the molten material must be discharged by partially repairing (molding) the outlet with irregular shaped refractory.

However, as described above, when the exit opening 10-1 is in a bad state when closing the exit opening 10, in particular when closing the exit opening with a mud gun, the following problem occurs.

First, as shown in Figure 2, when filling the refractory, the mud material (16) leaks without filling the inside of the outlet opening 10-2, the outlet opening is not completely closed, so high temperature through the outlet opening Wind and molten fugitives leak out. Therefore, it can cause environmental pollution and gas poisoning accident of workers due to dust and toxic gas. In addition, when the pressure of the wind blowing in the blast furnace to prevent the occurrence of such environmental pollution and gas poisoning, there is a problem that the molten iron production is reduced.

Secondly, if a leak occurs on the poor joint surface between the starting surface and the mud gun, the production cost increases due to the unit increase due to the loss of refractory material. In addition, since the depth of the phenomenon that the protective wall of the outlet 10 is not formed, the temperature of the outlet 10 rises and the outlet is not completely closed. There is a problem.

The present invention has been made in order to solve the conventional problems as described above, if the molten fly-products are attached to the exit port surface or if the state of the exit port is poor due to the dropping of the refractory on the exit port surface to emergency closing the exit port The purpose is to provide a blast furnace closure subsidiary device that can reduce the cost of chartering by preventing the leakage of refractory when the exit is closed and at the same time reducing the use of expensive refractory.

In order to achieve the above object, the present invention is equipped with a tip end portion of the mud gun for closing the exit port of the blast furnace using the mud material in the exit closure auxiliary mechanism for assisting the closure of the exit port, so that the mud material flows through A crimping member formed with a hollow portion, and a joining surface in contact with the exit opening face forward, a joining surface formed, and sawdust and wood chips being mixed at a ratio of 70:30, respectively; Provides a blast furnace outlet closing aid consisting of a paper sleeve inserted into the hollow portion of the pressing member to prevent the pressing member from escaping from the tip end of the mud gun when the exit opening is closed. Here, the pressing member includes sawdust and wood chips. It is preferable to mix these in the ratio of 70:30, respectively.

1 is a view schematically showing a state just before the exit mud gun closes the exit port 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 blast furnace outlet closing auxiliary mechanism according to an embodiment of the present invention is a sawdust and wood chips are mixed at a ratio of 70:30, respectively, and then using a bond to increase the adhesion of the mixture and dry them 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 deposits on the exit surface, the sawdust and particle size of the wood can be incinerated and crushed at 500 ~ 600 ℃ radiant heat generated by absorbing the shock and filling the pores of the irregular exit surface. It is prepared by pressing a piece of wood.

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

When the drying is completed, round discs are made by compressing the molds at a constant pressure to fit the outside diameter of the exit port.

At this time, the pressure to be compressed should be lower than the strength of the tap surface. The reason for this is that the tap-off surface calcined with the amorphous refractory material can be damaged. At this time, the tensile strength is preferably limited to 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 portion thereof so that it is not prevented from being inserted smoothly by foreign matter. Is formed.

In addition, the paper sleeve 21 and the hermetic holding plate 20 are fixed in four places in the diagonal direction so as not to be separated from each other by fixing the “∪” shaped fixing creps 21-1 in the diagonal direction.

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

That is, referring to Figures 5 and 6, due to the operation conditions during the departure, the exit must be urgently closed, or the melt flow path of the exit through the mud gun 30 when the normal end point.

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

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 mud gun 30 operator moves forward to the exit position of the mud gun while looking at the monitor (not shown) in the remote cab. Press (not shown).

In this way, even if the mud material at the distal end surface of the exit port and the mud gun 30, the tip of the nozzle tip check whether the mud material is well leaked into the exit port without leaking to the outside.

At this time, in order to prevent the leakage of the mud material between the peripheral surface of the exit port and the tip of the mud gun, the exit exit closing mechanism has a mud gun 30 by the hydraulic pressure when the exit port 10 is closed. Being squeezed to -1). At this time, the drop-out part of the exit point adhesive surface 10-1 or the resinous part attached when the melt is discharged is instantaneously crushed by the exit port closing aid 20 to fill the space of the irregular pores. Dense hot tissue is formed.

At this time, the sawdust and the wood pieces of the 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).

Therefore, 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, so that the protective wall 10- 3) is formed.

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,

Repetitive closing of the exit can be eliminated, reducing the worker's workload

By preventing the leakage of mud materials, the cost of chartering can be lowered.

Since the protection wall inside the blast furnace is sufficiently formed, the length of time for departure is long, which reduces the use of materials for the departure.

Refractories are not leaked out, and all of them are packed into the exit port to secure internal depth, which can contribute to productivity improvement and cost reduction through stable aging work.

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)

(Correction) In the exit closing assistance mechanism which is attached to the tip of the mud gun that closes the exit of the blast furnace using mud material, and assists the closing of the exit. A crimping member formed of a hollow portion to allow the mud material to flow therethrough, and a joining surface to be in contact with the exit opening face forward, wherein sawdust and wood chips are mixed in a ratio of 70:30; The blast furnace outlet opening assistance mechanism, characterized in that the pressing member is inserted into the hollow portion of the pressing member to prevent the pressing member from being separated from the tip of the mud gun when the outlet is closed. delete