JP3009760B2 - Hot refractory repair equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for repairing hot refractories in the field of metallurgy, and more particularly to an apparatus for repairing tuyeres for pouring molten metal such as ladles and tundishes.

[0002]

2. Description of the Related Art Conventionally, a ladle or tundish in a steel mill has a tuyere, which is a molten metal outlet, provided at the bottom thereof, and an upper nozzle is attached to the tuyere, and a molten metal flow rate is provided below the upper nozzle. A control sliding nozzle is attached to control the flow rate of the molten metal and discharge it to the downstream side. When the molten metal is poured from these ladles or tundishes, the tuyere is melted faster than other parts, so the tuyere is repaired regularly.

[0003]

In order to repair the tuyere, a spray repair device having a spray nozzle at the tip is moved up and down or left and right. It took a long time to attach, and it was difficult to finish the upper surface of the tuyere part of the repair part uniformly.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and has been made in view of the above problems, and has been made in view of the above problem. In the apparatus for repairing a refractory, a nozzle for spraying or spraying a refractory around the axis of a repair main body of the refractory repairing apparatus for hot repair, which is disposed to face the tuyere, and a blower. A grinder for grinding attached or sprayed refractories is rotatably arranged, and the opening of the tuyere can be closed. A plug is detachably attached to the tip of the repair main body of the refractory repair device. Another object of the present invention is to provide a hot refractory repairing apparatus characterized in that:

[0005]

When the hot refractory repair device of the present invention is used, a new upper nozzle is replaced for the melted tuyere portion, and the repair main body of the refractory repair device is axially opposed to the tuyere portion. By aligning the cores and rotating the repair nozzle arranged around the axis of the repair main body and spraying the refractory, the refractory is easily and quickly sprayed on the tuyere repair part to make it uniform. You can add more meat. Then, when a predetermined overlay is formed on the repair portion, the upper surface of the tuyere portion, which is the repair surface, can be uniformly and accurately finished by a grinding tool disposed around the axis of the repair main body.

In addition, since the plug is detachably attached to the tip of the repair main body of the refractory repair apparatus, the plug can be easily inserted into the opening of the tuyere at the start of the repair work. It can be inserted and closed, and the clogging of the upper nozzle portion with the repair material can be prevented, and the repair can be performed by easily spraying a refractory around the plug body.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments. 1 and 2 show an embodiment of the present invention. As shown in FIG. 1, a hot refractory repairing apparatus 2 for a ladle 1 has a repair body 6 of a rotary cylinder disposed on a slide 4 of a fixing device 3 via a pivotal support 5 so as to be movable up and down and rotatably. And is formed.

The repair main body 6 has a rigid cylindrical shape having a predetermined length, and a surveillance camera 8 and an ultrasonic camera are attached to a central shaft cylinder 7 as a shaft core as shown in FIGS. A position detector (not shown) of an expression type or the like is provided therein so that the repaired portion can be checked for damage from the shaft cylinder 7 or the ascending / descending position of the repairing main body 6 can be detected and moved up and down to a predetermined position. .

A repair nozzle 9 for spraying a refractory material as shown in FIGS. 1 and 2 is attached to one side of the barrel 7 of the repair body 6 of the rotary barrel. And 18
A grinding tool 10 such as a blade is attached to the tip of the other side of the shaft cylinder 7 on the side opposite to 0 ° so that the repair material of the refractory sprayed by the repair nozzle 9 can be ground. . At the rear of the repair nozzle 9, as shown in FIG.
The ring portion 11 is connected to mix a predetermined refractory spraying material and added water so that the spraying can be performed from the tip of the repair nozzle 9. Reference numeral 12 denotes a notch for spraying a repair material.

A clamp 13 is disposed at the center of the tip of the repair main body 6 of the rotary cylinder so as to be capable of being opened and closed by a link mechanism or the like as shown in FIGS. Mouth 1
A plug 15, which is a relatively soft material and has a shape along the opening on the upper side of the nozzle 4, is attached and detached by the clamp 13, and the tuyere part 14 in which the replacement of the upper nozzle 16 is completed is closed by the plug 15 and blown. They can be repaired. Reference numeral 17 denotes a gripper projecting from the plug 15, and reference numeral 18 denotes a sliding nozzle attached to a lower portion of the upper nozzle 16 for controlling the flow rate of the molten metal.

After the upper nozzle 16 of the tuyere portion 14 of the ladle 1 has been replaced with a new one to prepare for repair, the rotary cylinder of the refractory repair device 2 is repaired as shown in FIG. The main body 6 is opposed to the tuyere part 14 of the repairing part, the center line is aligned, the stopper 13 is grasped by the clamp 13 at the tip, and the plug 15 is inserted into the upper nozzle 15 of the tuyere part 14 to close the opening. .

Then, the state of melting is confirmed by the monitoring camera 8 of the barrel 7, and the repair main body 6 is lowered to a predetermined position by the rotating body lifting / lowering drive device (not shown) to prepare for spraying the refractory. I do. After the preparation for spraying is completed, the repair body 6 is rotated at a predetermined speed by a rotating body turning drive device (not shown), and the repair material is sprayed from the repair nozzle 9 as shown in FIG. The repair material can be built up in the repair portion around the plug 15 and repaired. At this time, since the repair material is sprayed while the repair nozzle 9 rotates, the repair material can be easily and uniformly deposited on the eroded portion around the plug body 15, which is preferable. It is preferable that the outer diameter of the plug 15 be smaller than the outer diameter of the upper nozzle 16 because the repair material sprayed from the repair nozzle 9 can fill the repair portion well.

At the same time as the repair nozzle 9, the grinding tool 10 disposed on the opposite side by 180 degrees also rotates about the axis of the repair body 6, and grinds the protruding portion of the repair material to make the repair surface uniform. Finish the surface. Although the repair main body 6 rises upward in FIG. 2, the lower surface is actually lowered to the repair surface, and the grinding tool 10 contacts the repair surface. When the surface finishing of the repaired part is completed, the plug 15 is grasped and removed by the clamp 13, and the spray repair work is completed.

In the above embodiment, the repair material is sprayed over a required range by varying the nozzle injection angle of the repair nozzle, or the grinding tool is protruded outward and ground over the required range. You can also. Further, the repair main body 6 can be horizontally moved over a predetermined range like a milling machine, so that the repair material can be sprayed or ground. In addition, repair nozzles,
The grinding tool may be moved up and down relatively to the repair main body so that repair can be appropriately performed according to the repair state.

Further, in the above description, the refractory repair device is repaired vertically facing the tuyere of the ladle. However, the hot refractory repair device is horizontal and the ladle is turned over by 90 degrees. Then, it can be repaired as described above.

In the above description, the molten steel ladle of the ladle has been described. However, the present invention can be similarly applied to a refractory molten metal container having a tuyere or other tuyere portion. You can also.

[0017]

As described above, according to the present invention, the repair nozzle is rotated around the axis of the repair main body and the repair material is sprayed on the repair portion. The repair part can be repaired by quickly and uniformly building up the refractory. Also, since the grinding tool can be rotated around the axis and ground, the repair material protruding and protruding can be ground for repair, and the upper surface of the tuyere is uniformly finished and repaired beautifully And the molten metal can be poured out smoothly.

Further, since a plug can be attached to and detached from the tip of the repair main body of the refractory repair device and the opening of the tuyere can be closed by the plug, the repair material enters the upper nozzle and the nozzle is clogged. Can be prevented, and the repair material can be easily sprayed along the periphery of the plug body to perform the repair work.

[Brief description of the drawings]

FIG. 1 is a partially cut-away side sectional view of an embodiment of the present invention;

FIG. 2 is a side sectional view of the refractory repairing section of the above.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ladle 2 ... Refractory repair apparatus 6 ... Repair main body part 9 ... Repair nozzle 10 ... Grinding tool 13 ... Clamp 14 ... Tuyere part 15 ... Plug body 16 ...
Upper nozzle 18: Sliding nozzle

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Haruo Mitsui 2 1576, Higashi-oki, Aki-shi, Ako-shi, Hyogo 2 Kawasaki Furnace Materials Co., Ltd. (72) Inventor Masanori Ota 392 Takahata, Hiraoka-cho, Kakogawa-shi, Hyogo (56) References JP-A-3-13790 (JP, A) JP-A-61-116287 (JP, A) JP-A-57-172182 (JP, A) JP-A-4-94863 ( JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B22D 41/30 F27D 1/16

Claims (1)

(57) [Claims] An apparatus for repairing a refractory for a tuyere such as a ladle or a tundish having a tuyere, wherein the apparatus for repairing a refractory for hot repair is arranged to face the tuyere. A repair nozzle for spraying or spraying refractories around the axis of the repair body and a grinding tool for grinding the sprayed or sprayed refractories are rotatably arranged, and the opening at the tuyere is closed. A hot refractory repair apparatus according to claim 1, wherein a plug is detachably attached to a tip portion of a repair main body of said refractory repair apparatus.