JPH057227Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a slag stopper device for an iron mixer car that prevents simultaneous outflow of slag during tapping from the iron mixer car.

(Prior Art) A pig iron mixer truck is a truck that transports hot metal produced in a blast furnace to a steelmaking factory for refining through an intermediate hot metal pretreatment process. At the pig iron receiving yard of this steelmaking factory, hot metal is transferred from the pig iron mixing car to the hot metal ladle in order to be charged into the converter, but at this time, not only hot metal but also a large amount of slag flows into the hot metal ladle.

Slag outflow from the pig iron mixer is caused by the blowing capacity of the converter,
Various slag stopper devices have been studied to prevent slag from flowing out, since it has a large effect on the hot metal blending ratio, blowing control accuracy, etc. Although the invention described in Publication No. 99706 has been proposed, it was not satisfactory.

As an alternative, there is a slag stopper device for a pig iron mixer car shown in FIGS. 6 to 14 as a device for preventing simultaneous outflow of hot metal and slag, which will be described below with reference to the drawings.

First, FIGS. 6 to 8 show the slug stopper 21. As shown in FIGS. This slug stopper 21 is composed of a frame 22 and a stopper body 23 suspended from the frame 22.

The frame 22 is assembled by connecting the left and right ends of two parallel main channel members 24, 24 with shorter end channel members 25, 25, and furthermore, the end channel members 25 have metal fittings at both ends. The plates 26 are fixed in a downwardly protruding state, and a substantially C-shaped hook 27 is formed at the lower end of the metal plate 26. Therefore, the latching hook 2
7 will be provided in a total of four locations.

The locking hook 27 has a shape as shown in FIG. 9, and claws 29 for preventing the pin block from falling out, which will be described later, are formed on both sides of the opening 28, and the upper center of the inside of the hook is formed into an inverted V shape. Ru.

As shown in FIG. 13, the frame 22 is sized to straddle the furnace mouth B of the pig iron mixer car A, and has pin brackets C at four locations on the outer periphery of the furnace mouth B of the pig iron mixer car A, corresponding to the above-mentioned hooks 27. be equipped.

Further, FIG. 10 shows an enlarged view taken along the line X--X in FIG. 6.

In the center of the frame 22, two connecting channel members 30 are installed at a required interval across the main channel members 24, 24, and two first connecting channel members 30 are provided on opposing surfaces of the connecting channel members 30, respectively.
A V-shaped guide hole 31 as shown in FIG. 1 is opened.

On the other hand, as is clear from FIG.
Two support pins 35 are installed in parallel to extend from the steel material 32 to the left and right flanges 34, 34 that fit between the connection channel member 30. The end portion is freely inserted into and engaged with the V-shaped guide hole 31 described above. Therefore, the stopper body 23
can move along the hole shape of the V-shaped guide hole 31. Note that a pin 36 is inserted into the support pin 35 to prevent it from coming off from the flange portion 34, as shown in FIG.

Slag stopper 21 configured as above
Attach the hook 27 on the frame 22 side to the pin bracket C on the pig iron mixer A side by dropping it from above and engaging it. Since the internal space of the latching hook 27 has an inverted V shape as described above, the pin bracket C automatically fits into the space section (center position of the hook) 37 in FIG. 9. Further, the stopper body 23 protrudes into the inside of the furnace mouth B to cover the central part of the furnace mouth, and this stopper body 2
An opening 38 is formed between 3 and the furnace mouth wall D.

Next, when the pig iron mixer A is tilted from the normal position of A to the positions of B and C in FIG. slides, and one of the locking claws 29 of the locking hook 27 locks onto the pin of the pin bracket C. As a result, the pig iron mixer A
Since the slag stopper 21 does not come off even if the slag is tilted by more than 90 degrees, the hot metal flows out from the opening 38 between the stopper body 23 and the furnace mouth wall D, but the slag above it is held by the stopper body 23. be dammed up.

Furthermore, when the pig iron mixer A is returned to its original position, the centers of the pin bracket C and the latching hook 27 automatically align as before, so that the slag stopper 21 can be removed from the pin bracket C by simply lifting it.

Furthermore, when the pig iron mixer A is tilted as described above, the stopper body 23 moves toward the tilting side along the V-shaped guide hole 31 on the frame 22 side, and the stopper body 23 and the opening 38 of the furnace mouth wall D move. Make smaller. It is clear that when the pig iron mixer wheel A is returned to its original position, the stopper body 23 also returns to its original position in the V-shaped guide hole 31.

With the above-mentioned configuration, when the pig iron mixer is tilted, the claw of the hook hooks onto the pin bracket and prevents the slag stopper from coming off, so that the hot metal flows through the stopper body and the opening in the furnace port wall. The slag that flows out and the slag above it is dammed up by the stopper body.

However, in the equipment shown, the amount of slag flowing out when the stopper is installed is approximately 0.5 kg/pig-t when the furnace is new.
2.7Kg/pig− before repair, compared to 2.7Kg/pig−
As the furnace mouth is melted and damaged, a problem arises in that hot metal and slag simultaneously flow out from the furnace mouth of the pig iron mixing car.

(Problem to be solved by the invention) However, with the illustrated and explained slag stopper device, if the furnace port of the pig iron mixer car is used for a long time, the furnace port before repair will deteriorate due to contact between heat and hot metal. Compared to when the furnace was new, there was significant melting damage around the entire circumference of the furnace mouth, which expanded. This is a major cause of reducing the effectiveness of preventing slag outflow, and the stopper body is designed to be able to move in the direction of hot metal outflow.
If the melting damage at the furnace mouth becomes large before the furnace is repaired, the effect of preventing slag outflow cannot be achieved, and hot metal and slag will flow out at the same time.

That is, as the melting damage progresses around the entire circumference of the furnace mouth, the movement distance of the stopper body is limited, making it impossible to adjust the gap between the stopper body and the furnace mouth wall to a constant value. As a result, there is a problem in that when the hot metal is discharged, there is a high possibility that the slag will also be discharged at the same time.

This invention can prevent slag from flowing out regardless of the amount of erosion at the furnace mouth of a pig iron mixer car, and also prevents slag from flowing out.
To provide a slug stopper device for a mixed pig iron car, which allows a stopper to be easily attached and detached.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the slag stopper device for a pig iron mixer car of the present invention has a lid-shaped slag stopper device with a tap hole drilled in the upper part of the pig iron mixer car furnace opening. - A stopper is arranged, and the slug stopper is held by a stopper presser that is swung by a drive mechanism.

(Function) The lid-shaped slag stopper (hereinafter referred to as the stopper) attached to the top of the torpedo car throat is provided with a tap hole, so when the torpedo car with the stopper attached is tilted for tapping,
By utilizing the difference in specific gravity between the molten iron and slag in the torpedo car, only the molten iron is discharged from the tap hole drilled in the stopper. If the torpedo car is kept at the same tilt angle, the molten iron level will drop and the slag will flow out of the tap hole, so the torpedo car is tilted further.

For this reason, since the pig iron car furnace mouth does not come into direct contact with the hot metal flow, the melting loss of the furnace mouth refractory material is reduced.

In addition, the stopper is held by a stopper presser at the top of the furnace mouth, so it will not fall off even if the pig iron mixer car is tilted more than 90 degrees.

Therefore, the taphole of the stopper attached to the upper part of the pig iron mixing car furnace mouth is eroded and damaged by the discharge of hot metal, and as it expands, the effect of preventing slag outflow decreases, but by replacing the stopper with a new one, the slag outflow can be prevented. Preventing the prevention effect from decreasing. At this time, the mixer car furnace mouth has been eroded compared to when the furnace was new, but since the stopper is new, a high effect of preventing slag outflow can be obtained regardless of the furnace mouth melting damage.

(Example) The stopper for preventing slag outflow of the present invention was
To explain with reference to FIGS. 3 to 3, this stopper 1 has a structure in which a fireproof material is applied to the outside of a steel frame, and two tap holes 3 for discharging molten pig iron 2, which will be described later, are bored in two opposite locations. It is set up.

Further, the stopper 1 is connected to the furnace port 5 of the pig iron mixer car 4.
The furnace port 5 of the pig iron mixing car 4 serves as a stopper presser that is attached to the upper part and fixes the stopper 1.
Support members 6 are fixedly attached to four locations on the outer side, and an inverted L-shaped link 7 is installed on each of the support members 6 so as to be swingable about a support shaft 8 as a fulcrum.

Further, as a drive mechanism for swinging the links 7 about the support shaft 8, a rod of a cylinder 9 driven by pneumatic or hydraulic pressure is connected to the lower end of each link 7.

As mentioned above, the stopper 1 is fixedly installed above the furnace mouth 5 of the pig iron mixer car 4 in which hot metal 2 and slag 10 are accommodated, as shown in FIG.

Furthermore, since a gutter 11 is installed above the furnace port 5 of the pig iron mixing car 4, even if the hot metal 2 accidentally flows out from the tap hole 3 of the stopper 1, the flowed out hot metal 2 will flow along the gutter 11. It can then be poured into a hot metal pot.

Furthermore, the size of the stopper 1 is made larger than when the furnace port 5 of the pig iron mixer 4 is melted,
Two tap holes 3, 3 are provided. This is because the hot metal 2 of the pig iron mixing wheel 4 is rotated clockwise or counterclockwise to discharge the hot metal 2, so the tap holes 3 are provided at two locations as described above.

The device of the present invention has the above-mentioned configuration, and the operation of discharging the hot metal 2 in the pig iron mixing wheel 4 to the hot metal ladle so that the slag 10 is not mixed in will be explained.

The stopper 1 is the gutter 11 above the furnace mouth 5 of the pig iron mixer car 4.
Since the stopper 1 can be mounted as a guide, the stopper 1 can be easily positioned, and the stopper 1 can be freely swung around the support shaft 8 by operating each pneumatically or hydraulically driven cylinder 9 installed on the pig iron mixer 4. The lower end of the installed inverted L-shaped link 7 is swung, and the upper end of the link 7 presses the upper surface of the stopper 1 to fix it.

As an aid, when the stopper 1 is installed, if a refractory material is applied between the stopper 1 and the upper surface of the furnace mouth 5 to eliminate a gap, it becomes possible to prevent the hot metal 2 from leaking.

In the manner described above, the stopper 1 is firmly fixed so as to close the furnace port 5 of the pig iron mixer car 4. Thereafter, the hot metal mixer 4 containing the hot metal 2 and slag 10 is tilted, and the hot metal 2 is discharged from one of the tap holes 3 provided in the stopper 1.

The hot metal 2 is discharged by tilting the pig iron mixing wheel 4 as shown in FIG. Tap hole 3 at the beginning during tilting
A small amount of slag 10 flows out from one side, but after that, hot metal 2 flows out from the tap hole 3.

If the tilting condition is maintained, the level of the hot metal 2 will decrease and the slag 10 will flow out, so the pig iron mixer 4 is always tilted in advance so as not to cause the slag 10 to flow out.

The stopper 1 completely dams up the slag 10 on top of the hot metal 2 due to the difference in specific gravity and prevents it from flowing out of the pig iron mixing wheel 4.

As described above, the stopper 1 is fixedly provided above the furnace port 5 of the pig iron mixing car 4, and only the hot metal 2 can be discharged into the pig iron receiving ladle from one of the tap holes 3 provided in the stopper 1.

If the tap hole 3 of the stopper 1 becomes large due to melting damage, the stopper 1 is replaced with a new one. As a result, the effect of preventing the slag 10 from flowing out is improved.

When replacing the stopper 1, the cylinder 9 as a drive mechanism is operated to release each inverted L-shaped link 7 from the pressed state, so that the stopper 1 can be easily attached and detached. Also,
This stopper 1 is attached and detached for each charge.

Although the slag stopper device of the present invention is shown as being installed on a pig iron mixer car, it can also be installed so as to cover a hot metal ladle or a hot metal ladle.

(Effects of the invention) The slag stopper device for a pig iron mixer car of the invention has the following features:
A stopper is installed to block the upper part of the furnace mouth of the pig iron mixer car, and since hot metal flows out from the tap hole provided in this stopper, slag outflow is prevented regardless of the amount of erosion at the furnace mouth of the pig iron mixer car. In addition, the stopper can be easily attached and detached.

[Brief explanation of the drawing]

Figure 1 is a longitudinal side view of the furnace mouth with the stopper of the present invention attached, Figure 2 is a plan view showing the stopper installed at the furnace mouth, and Figure 3 is the slag and pig iron mixer car of the present invention.
Fig. 1 is a cross-sectional view taken along line A-A in Fig. 1 showing the stopper device, Fig. 4 is an explanatory diagram showing the mounting position of the slag stopper device of the pig iron mixer of the present invention, and Fig. 5 is the slag stopper of the pig iron mixer of the present invention. Figure 6 is a plan view of the slag stopper showing the conventional equipment; Figure 7 is a partially cutaway front view of Figure 6; Figure 8 is a side view; Figure 9 is a latching diagram. An enlarged view of the hook; Fig. 10 is an enlarged view taken along the line X-X in Fig. 6;
Figure 11 is an enlarged view of the guide hole, Figure 12 is a partially enlarged view of the support pin, and Figure 13 is the slag and
FIG. 14 is a cross-sectional view of the stopper attached state, and is an explanatory view of the operation. 1...Slag stopper, 2...Hot metal, 3...
...Tapping port, 4...Pigtail car, 5...Furnace mouth, 6...Support member, 7...Link, 8...Support shaft, 9...Cylinder, 10...Slag, 11...Gutter.

Claims (1)

[Scope of utility model registration request] A pig iron mixer car having a structure in which a lid-shaped slag stopper with a tap hole is arranged above the furnace mouth of the mixer car, and the slag stopper is held between a stopper presser that is oscillated by a drive mechanism. slag stopper device.