KR100798064B1 - Mud gun supporting device when emergency closing tap hole - Google Patents

Abstract

According to the present invention, when the exit of the blast furnace exit of the steel mill or the failure of closing the exit due to the excessive damage of the protection wall is caused, the exit exit can be normally operated without the reduction of the output. A mud gun assisting device when closed, and has a certain size in a central part having a block guide formed of a trapezoidal refractory spaced at an angle of 90 degrees to an outer circumferential surface in consideration of the characteristics of the hot melt ejected from the exit port and the inner diameter of the exit port. A fireproof solid having a through hole formed therein; A tapered refractory formed smaller than the inner diameter of the nozzle tip of the mud gun and formed to be inserted into the outlet by the force of the mud material to be filled when closed; The tapered refractory is overlaid on the inserted mud gun nozzle tip, and the nozzle tip is detachably attached to the nozzle tip and includes an emergency cap nozzle formed of a taper sheet.

According to the present invention, it is possible to prevent secondary equipment accidents by quickly and safely closing the secondary closure normally in a state of not leaving the airflow and depressurization during the dropout of the exit surface and the excessive protection wall, which are the main causes of the failure of closing the exit of the blast furnace. In addition to securing the safety of the worker can contribute to high productivity.

Description

Mudgun Auxiliary Device for Emergency Closed Exit Exit {MUD GUN SUPPORTING DEVICE WHEN EMERGENCY CLOSING TAP HOLE}

1 is a working state closing the exit port using a conventional mud gun,

2 is an emergency closing operation state of the exit port using a conventional opening machine,

Figure 3 is a perspective view of the emergency closing device using a conventional mud gun,

Figure 4 is a perspective view of the mudgun auxiliary device for emergency closing according to the present invention,

5 is an exploded perspective view of the mudgun auxiliary device of the present invention;

Figure 6 is an emergency closing operation state using the mudgun auxiliary device of the present invention.

Explanation of symbols on the main parts of the drawings

1: exit port 3: opening machine

6: mud gun 6a: nozzle tip

21: block guide 22: inflow

23: through hole 30: emergency cap nozzle

31: nozzle cover 32: spiral louver

33: clamp

According to the present invention, when the exit of the blast furnace exit of the steel mill or the failure of closing the exit due to the excessive damage of the protection wall is caused, the exit exit can be normally operated without the reduction of the output. A mudgun assist when closed.

In general, the blast furnace industry charges raw materials such as iron ore and fuel coke to the upper part of the furnace, and blows hot air at about 1200 ° C through about 34 wind holes provided therein. It is a work to make a melt by melt reduction reaction.

As shown in FIGS. 1 to 3, the melt is bottomed at the bottom of the furnace and discharged through four outlets 1 provided outside the furnace when a predetermined amount or more is reached.

When a certain amount of melt is discharged from one tapping port 1, the tapping work is repeatedly performed by the opening machine 3 penetrating the same at another tapping port, and when a predetermined amount of melt is discharged again, The closing operation is performed by the mud gun 6 closing the exit port 1.

At this time, when the tap opening surface 8 is partially dropped or the protective wall 9 is excessively dropped due to the construction of the tap opening 1 and poor material and gas leakage, the nozzle tip 6a of the mud gun 6 and the tapping The spherical surface 8 is inconsistent and causes failure of closing the exit port 1 due to the excess of the closed area, which causes a secondary equipment accident.                         

In this case, it is necessary to re-close the exit port 1 while the blast furnace is stopped by blocking the hot air or reducing the supply of hot air through the air blasts, thereby bringing enormous production disruption.

In order to improve this, the applicant has filed a special emergency closing rod of the exit port 99-64137 and its closing method, but this is applied to the tapping bar (5) of the opening machine (3) the emergency closing rod (4) After connecting and opening the opening machine (3) to the outlet opening (1) in advance, the air opening feeder (3a) is advanced by pneumatic pressure to enter the emergency closing rod (4) into the outlet opening (1) temporarily It was to block the melt flow path inside the exit port.

However, the tapping bar in the form of a pipe coupled to the emergency closing rod 4 has a temperature of the melt remaining in the actual large waterway 2 and the melt discharged through the outlet 1 at a high temperature of about 1520 ° C. (5) is easily deformed by the radiant heat of the large hot waterway (2), and the body of the opening machine (3) is moved forward and backward pneumatically by the chain, which is a serious secondary accident when the chain is also dropped by radiant heat. In order to enter the emergency closing rod (4) to the exit port (1), the operator has to guide using a lever, so that the safety of the operator by the radiant heat of the hot water and the hot water (2) We could not solve the problem that threatened greatly.

In addition, there is a problem that the hot air blown into the furnace must be worked after being rested, and that the hot (about 1500 ° C. or more) melt discharged from the furnace is not easily solidified by temporary blocking.

 The present invention was created in order to solve the above problems, and it is determined that normal closure due to the dropout of the exit surface and the excessive drop of the protective wall is difficult or the tapered refractory and the refractory solids are closed when the closing is closed. The objective is to provide a mud gun assist device during emergency exit closure of the exit, which covers the nozzle tip of the gun so that the exit can be closed in the absence of hot air.

The above object of the present invention is a through-hole of a predetermined size in the center having a block guide formed of a trapezoidal refractory spaced at an angle of 90 degrees on the outer circumferential surface in consideration of the hot melt characteristics ejected from the exit port and the inner diameter of the exit port. And a refractory solid formed therein; A tapered refractory formed smaller than the inner diameter of the nozzle tip of the mud gun and formed to be inserted into the outlet by the force of the mud material to be filled when closed; The tapered refractory material is covered with a mud gun nozzle tip is inserted, the mud gun auxiliary when exiting the emergency exit closing door characterized in that it comprises an emergency cap nozzle formed of a tapered seat detachably attached to the nozzle tip By providing a device.

Hereinafter, the configuration of the present invention will be described by the accompanying drawings.

4 is a partially cutaway perspective view of the emergency closing mud gun auxiliary device of the present invention, Figure 5 is an exploded perspective view of the mud gun auxiliary device of the present invention.

4 to 5, the refractory solids 20 is designed to have an inner diameter smaller than the size of the inner diameter of the mud gun nozzle tip 6a, and is formed to enter the exit port 1 when closed.                     

In addition, the outer side of the cylindrical refractory solids 20, the four block guides 21 made of a trapezoidal shape is located at intervals of 90 degrees, the height of the rear is made higher than the height of the front, has a certain width and the inside A through hole 23 of a predetermined size is formed.

In addition, the tapered refractory material 34 having a constant inclination is placed between the outer circumferential surface of the refractory solids 20 and the emergency cap nozzle 30, and surrounds the refractory solids 20, and has a predetermined size in the space therebetween. Space is secured so that the inflow material (STAMP material) 22 can be built.

The tapered refractory 34 has a size larger than that of the taper 30a formed at the tip of the emergency cap nozzle 30 due to the inclination, and the taper seat 34a maintaining a constant angle is located, and the taper 30a is located. ) Is formed to have a smaller size than the inlet side (outlet size at the time of closing failure).

On the other hand, the emergency cap nozzle 30 is made the same as the shape of the nozzle tip (6a) and the size is larger than the nozzle tip (6a) and the front end is coupled to the outlet connection surface (8).

The internal shape of the emergency cap nozzle 30 has a taper seat 30a having a constant inclination so that the tapered refractory 34 can be embedded therein, and a jaw 30c close to the nozzle tip 6a of the conventional mud gun at the rear side thereof. There is a large, spiral large louver 32 is attached to the rear side of the projection, and two high clamps 33 are attached diagonally on the outer circumferential surface of the nozzle cover 31, and the operation of the high clamps 33 is performed. The part 33-1 has a cam shape.

Referring to the operation of the present invention configured as described above are as follows.                     

The melt discharged through the outlet opening (1) after a certain time the bottom line (低 銑) is down and the wind comes out with the melt through the outlet opening (1), just before closing the outlet opening (1) In the event that the primary closure is unsuccessful due to partial dropout of the exit opening surface (8) and excessive dropout of the protective wall (9), the emergency closing assistance device is immediately coupled.

Check the enlarged exit size and center to select the size of the tapered refractory 34 and the refractory solid 20 before joining, and then select the appropriate size, and then the constant between the tapered refractory 34 and the refractory solid 20. Insert the sized lumped refractory 22.

In this case, the projection-type louvers 32 are inserted and spirally attached so as to prevent the flow of the nozzle cover 31 and the emergency cap nozzle 30 and the shock-absorbing role. Fixing (33) completes the preparation of the second emergency closing operation in the absence of wind.

On the other hand, as shown in Figure 6, when the emergency cap nozzle 30 is in close contact with the damaged exit surface 8 to advance the filling lever of the mud gun (6), at this time is embedded in the mud gun (6) immediately As the mud material is injected into the exit port, the refractory solids 20 embedded in the emergency cap nozzle 30 are pushed into the exit port 1 to enter the discharge port 1 to lower the melt and the ejection pressure.

At the same time, the tapered refractory material 34 enters the inside of the outlet opening 1 to a certain depth by the force of the injected mud material, and no further entry is made by the tip of the taper seat 30a, so that the outlet connection surface 8 ) Is inserted into the damaged exit port (1).

The agglomerated inflow material 22, which is built between the refractory solids 20 and the tapered refractory material 34, is intimately injected into the damaged exit surface 8 and the weak part inside the exit opening 1 so as to break the damaged part. Since the mud material is filled, the mud material is normally injected without leaking through the gap, and passes through the through hole 23 inside the refractory solid 20, thereby performing a normal closing operation.

As described in detail above, the present invention provides a quick and safe closure of the secondary closure normally in a state in which no airflow and depressurization occur when the exit surface dropout and the protection wall are excessively dropped during the exit closure of the blast furnace. In addition to preventing car accidents and securing worker safety, the company can contribute to productivity improvement.

Claims (1)

In consideration of the hot melt characteristics ejected from the outlet port 1 and the internal diameter of the outlet port 1, the block guide 21 formed of a refractory having a trapezoid shape spaced at an angle of 90 degrees to the outer circumferential surface has a predetermined size. A fireproof solid 20 having a through hole 23 formed therein; A tapered refractory material 34 formed smaller than the inner diameter of the nozzle tip 6a of the mud gun and formed to be inserted into the outlet opening 1 by the force of the mud material which is filled when it is closed; The tapered refractory 34 includes an emergency cap nozzle 30 covering the mud gun nozzle tip 6a in which the tapered refractory 34 is inserted and the nozzle tip portion is formed of a taper seat 30a to be detachably attached to the nozzle tip 6a. Mud gun assisting device when emergency exit closing the outlet, characterized in that configured.

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