KR20020084951A - Aggregate box assembly for closing tapping hole of blast furnace - Google Patents

Abstract

PURPOSE: An aggregate built-in box assembly for closing tapping hole of a blast furnace is provided which effectively prevents outflow of hot metal and mud when there is something wrong with the bonding surface of the tapping hole to prevent damage of the tapping hole due to explosion and effectively maintain appropriate depth thereof. CONSTITUTION: The aggregate built-in box assembly for closing tapping hole of a blast furnace comprises a cylinder body(10) which is formed in one end opened hollow cylindrical shape using a thermoplastic material, and at the central part of a closed end of which a cutout groove(12) is formed; a cover(20) which is formed of a thermoplastic material so that the cover(20) is coupled to the opened end of the cylinder body(10), and on the central part of which a cutout groove(22) is formed, wherein 30 wt.% of polygonal large sized aggregate(32) having an outer diameter of 15 to 22 mm, 30 wt.% of polygonal medium sized aggregate(34) having an outer diameter of 7 to 17 mm and 40 wt.% of polygonal small sized aggregate(36) having an outer diameter of 2 to 10 mm are sequentially filled in the cylinder body(10) from one side of the cylinder body(10).

Description

Aggregate box assembly for closing tapping hole of blast furnace}

The present invention relates to a box assembly in which the aggregate for closing the blast furnace outlet is embedded. More specifically, when an abnormality occurs in the junction surface of the outlet, it can be immediately inserted into the mud gun nozzle tip to close the outlet. The present invention relates to a box assembly in which an aggregate for closing a blast furnace outlet is provided.

In general, in order to achieve a desirable tapping work, it is necessary to suppress the phenomenon that the taping joining surface is damaged or peeled off due to the vibration of the opening machine during the tap opening work, and the opening of the tap opening is completed. During the discharge, the piercing surface of the tapping port must be prevented from being eroded or damaged due to the abnormal tapping of the taping due to the vortex of the molten iron. Should be prevented.

In particular, when the mud material 120 is leaked to the erosion or damaged portion 110 of the outlet 100 when closing the outlet 100 as shown in Figure 1, the molten iron 130 is also leaked with the explosion The operation is stopped because this occurs or the nozzle tip 140 of the mud gun is not molten to close the exit port, which causes various problems such as reducing productivity, so proper closing of the exit port is a very important task.

Conventionally, in the process of unloading, if the splice surface of the spout is dropped, or the spout is eroded or damaged by the molten iron vortex, the mud material is removed from the nozzle tip of the mud gun tip before closing the spout, and then the aggregate inside the nozzle tip. After inserting and inserting the duct, which is a refractory material for octopus or tapping, attempted to close the taping opening.

However, due to the operation characteristics of the blast furnace at the point of closing the exit, the cumbersome work of crushing the aggregate according to the particle size and inserting it into the mud gun nozzle tip whenever the abnormality occurs at the junction of the exit is high temperature, that is, about 1500 ° C. It is very difficult to carry out at the place, and in order to prevent the aggregates from flowing down, the clay, which is the mud gun nozzle tip inlet, or the opening material, which is a refractory material for drying, is dried in a short time to close the nozzle tip. On the contrary, the mud material inside the mud gun is prevented from being pushed into the exit port, which causes the exit closure failure. The leakage of the charter and mud material caused by the press injection failure adversely affects the aging, such as explosion, depth of depth, and poor charter discharge. Was to give.

The present invention has been made to solve such a conventional problem, the object of which is to insert the mud gun nozzle tip immediately when an abnormality occurs in the outlet connection surface of the blast furnace to close the outlet port and the molten iron outflow and mud The present invention provides a box assembly having blast furnace closure opening aggregates that effectively prevents reflow of the blast furnace and prevents damage due to the explosion of the exit port and maintains a proper depth.

1 is a problem derivation diagram showing a problem when damage occurs in the blast furnace outlet in general;

Figure 2 is an exploded perspective view showing a box assembly in which the aggregate for closing the blast furnace outlet according to the present invention;

Figure 3 is an external perspective view showing only the cover of the box assembly of the present invention disassembled;

4 is a working state diagram showing a state of closing the blast furnace outlet using the box assembly according to the present invention; to be.

※ Explanation of symbols about main part of drawing ※

10: cylinder

12: incision groove

22: incision groove

20: cover

32, 34, 36: aggregate

As a technical configuration for achieving the above object, the present invention is a cylindrical body formed by a plastic material, one end of which is formed into an open hollow cylinder and formed with a cutout in the center of the closed end, and to be coupled to the open end of the cylinder. For blast furnace exit closure characterized in that it comprises a cover formed by a plastic material and forming a cutout in the center, and filling the aggregate of the opposing aggregate, the neutral aggregate and the small aggregate sequentially from one side to the inside of the cylinder. By providing a box assembly containing the aggregate.

Figure 2 is a perspective view showing an exploded view of the box assembly in which the aggregate for closing the blast furnace outlet according to the present invention, a hollow transport cylinder formed of a plastic material, such as paper that can be easily incinerated when the molten iron is in contact with the molten iron (10) Has

The cylinder 10 is formed in a form in which one end thereof is closed and the other end is opened, and an incision groove 12 is formed in the center of the closed end. The incision groove 12 is formed in a plurality of radially from the center to be split when an external force is applied.

The interior of the cylinder 10 is made of polygonal aggregates of the opposing aggregate 32 having an outer diameter of about 15 to 22 mm, and a neutral aggregate of polygonal shape having an outer diameter of about 7 to 17 mm ( 34) and the aggregate is made of a small aggregate aggregate 36 of polygonal size and the outer diameter of about 2 to 10 mm, the aggregate aggregate 32 of the opposition is about 30% of the total weight, neutral aggregate (34) ) Is preferably about 30% of the total weight, and the small aggregate aggregate 36 is about 40% of the total weight.

In the above, it is filled from any one side of the cylinder 10 in the order of the aggregate aggregate 32, the neutral aggregate 34 and the small aggregate 36, so that the aggregate (32) (34) (36) is The filled state is shown in FIG.

In addition, the opening of the cylinder 10 filled with the aggregates 32, 34, 36 is closed by the cover 20, and the cover 20 is also cut in the same manner as the closure of the cylinder 10. 22) is formed.

The size of the aggregate can be changed according to the degree of erosion or damage to the exit of the blast furnace, it is good to record the maximum and minimum particle size 43 of the aggregate on the outer surface of the control (10).

The size of the box assembly 1 is such that the outer diameter of the lid 20 is smaller than the inner diameter of the nozzle tip of the mud gun and the opposite outer diameter is the same as the inner diameter of the nozzle tip of the mud gun. It can be inserted into the nozzle tip of the gun, in which case the whole of the box assembly (1) is inserted into the nozzle tip of the mud gun so that it does not easily escape from the nozzle tip even if the mud gun vibrates or shakes.

In addition, it is also possible to use a mixture of aggregates and the like for the clay or starting refractories together with the aggregates 32, 34 and 36.

In addition, the outer surface of the tubular body 10 and the lid 20 forming the box assembly 1 is preferably coated with a vinyl resin to prevent the internal moisture of the box assembly 1 from being evaporated to the outside.

The operation of the present invention having such a configuration will be described.

The box assembly 10 in which the aggregates 32, 34 and 36 for closing the blast furnace outlet of the present invention is prepared in advance so that the outlet can be quickly closed when an abnormality occurs in the blast furnace outlet. As the opening of the tap opening is performed, the tap surface of the tap opening may be damaged or dropped due to the vibration of the opening machine, or the tap opening may be eroded due to the swirling phenomenon of the molten iron during the discharge of the molten iron. This may be used if the outlet joint surface is eroded or damaged, or if the mud material spills to the eroded or damaged area of the outlet during the closure of the outlet with the mud gun.

The box assembly 1 of the present invention removes the mud material 120 inside the tip of the nozzle tip 140 of the mud gun and then directs the box assembly 1 of the present invention to the nozzle tip 140 of the mud gun. To be fitted.

After moving the mud gun in this state so that the nozzle tip 140 of the tip is in a position to close the exit port 100, when the mud gun cylinder 150 is advanced, the mud material 120 inside the mud gun is moved. When pushed toward the nozzle tip 140, the pressure is applied to the box assembly (1) by the mud material 120, the incision grooves formed in the closed end and the lid (20) of the box assembly (1), respectively As the 12 and 22 are opened, the aggregates 32 and 34 and 36 inside the box assembly 1 are inserted into the exit port.

At this time, the aggregate aggregate 32 of the opposition is first inserted into the exit port, followed by the neutral aggregate 34 and the small aggregate aggregate 36 continue to be inserted into the exit port. ) First to block the damaged part of the outlet, the neutral aggregate 34 is continuously inserted to prevent the damaged part of the outlet blocked by the allele 32, and then the small aggregate 36 By blocking a small gap is effectively blocked the flow of the molten iron 130.

At this time, considering that the inner diameter of the tapping hole tapping hole of the blast furnace is formed about 50 to 60mm, when the particle size of the aggregate aggregate 32 of the confrontation is larger than 25mm, a phenomenon occurs in which the aggregate closes the taping hole itself. Since refilling is hampered, it is necessary to appropriately limit the size of the aggregates 32.

In addition, since the materials of the cylinder 10 and the lid 20 forming the box assembly 1 are plastic, they can be incinerated after about 1 to 2 seconds while being in contact with the molten iron at the time of closing the outlet, while the materials are not damaged at low temperatures. It is preferable to form to the thickness which is.

As described above, according to the box assembly in which the blast furnace outlet closing aggregates according to the present invention are embedded, alleles, neutral aggregates, and small aggregates of appropriate specifications are sequentially filled in a plastic cylinder, and then prepared in a state of covering with a lid. By making it available, the blast furnace exit closure can be carried out very quickly.

In addition, it effectively blocks the damaged part of the exit port to maintain the rust of the blast furnace operation to improve the productivity.

Claims (2)

Molded by a plastic material, one end is opened in a hollow cylindrical shape and formed by a plastic material so as to be coupled to the open end of the cylindrical body 10 formed in the incision groove 12 in the center of the closed end. And a cover 20 having an incision groove 22 formed in the center, and the aggregate 32 of the opposing aggregate, the aggregate 34 of the neutral, and the aggregate 36 of the granules from one side inside the cylinder 10. Box assembly with blast furnace closure closure aggregates characterized in that the filling sequentially. 2. The polygonal aggregate of claim 1, wherein the aggregate aggregate 32 is composed of 30 wt% of polygons having an outer diameter of 15 to 22 mm, and the neutral aggregate 34 is polygonal having an outer diameter of 7 to 17 mm. Consists of 30% by weight, the remainder is a box assembly with a blast furnace outlet closure aggregates, characterized in that filled with aggregates of granular granules 36 of polygonal diameter of 2 to 10 mm in size.