JPS6025485B2 - Converter tapping port repair method and equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for repairing the eroded portion of the refractory layer on the inner wall of a converter tap by applying a refractory, and an apparatus therefor.

[Prior art] As a conventional method for repairing a converter tap, a method similar to an expandable and retractable umbrella-shaped device that can close the rim of the tap on the inside of the furnace is used, as described in Tsubaki Sekisho No. 50-1 So No. 607. A cage-shaped device is attached to the tip of the refractory, and the supplied refractory is discharged from the nozzle hole of the pipe, and the refractory is filled between the outer circumference of the pipe and the inner wall of the tapping port, and after the refractory has properly hardened. The pipe and umbrella-shaped device are pulled out from the tapping port.

[Problem that the invention seeks to solve]

However, unless the refractory is pumped under considerable pressure, a refractory layer cannot be formed on the inner wall of the tap hole, and it takes a considerable amount of time to fill the refractory, so some parts of the refractory are removed from the vicinity of the pouring nozzle. There were disadvantages in that the refractory hardened and the refractory could not be filled uniformly and homogeneously, and it took more time to add a cooling device to handle the heating of the device.

An object of the present invention is to provide a method and apparatus for repairing a tap hole of a converter that eliminates these drawbacks. [Means for Solving the Problems] Hereinafter, means for solving the above problems will be specifically explained with reference to embodiments shown in the accompanying drawings.

(First Embodiment) The first embodiment shown in Figs. 1, 2, 3, and 4 is a refractory outlet pipe, where la is the tip of the pipe, lb is the spout hole, and lc is a preformed refractory pipe. The loading door of block A, 2 is a running vehicle on which the refractory ejection pipe 1 is rotatably mounted,
2b is a wheel, 2c is a pipe support bearing, 2d is a rotation motor, 2e is a rotation transmission gear, 2h is a chain, 2i
is a sprocket wheel, 2i is a motor for driving the sprocket wheel, 3 is a moving machine frame incorporating a refractory pouring pipe and advance/retreat device 2, 3a is a rail for wheel 2b, 3
b is centering guide, 3c is clamp magnet 3d
3e is a spring, 3f is a wire, 3g is a traveling roller, 3h is a driving device for the same roller, 3i is an electric/hydraulic system connector 4 is a refractory extrusion device, 4a is an extrusion device for refractory block A 8 is an operation panel, and 9 is a centering guide cylinder attached to the tapping port C of the converter B.

FIG. 5 shows an example in which the advancing/retracting device 2 is changed to a hydraulic cylinder 2k instead of a chain drive. Moreover, FIG. 6 is a modified example in which the refractory block A is easily inserted into the refractory floating pipe 1, and the input door lc is made rotatable with a screw. FIG. 7 shows the guide rail 5 of FIG. 1 which can be further run in the left and right directions. Figure 8 shows a model in which the suspension and movement method of the moving machine frame 3 has been changed, and the clamping mechanism has also been changed.
j to enable centering, and a hydraulic cylinder 3k to make it movable.Furthermore, as shown in the perspective view of FIG.
m, and a clamp cylinder 3n.
The operation of this first embodiment is to fill the required number of refractory blocks A into the refractory injection pipe 1 through the charging door lc,
The hanging type moving machine frame 3 is brought close to the tapping port C, the hydraulic cylinder 3d or 3j is used to adjust the centering, and the setting is completed by clamping with the (electromagnetic) magnet 3c or clamp arms 31, 3m. Next, the traveling vehicle 2a is moved to the inner end of the tapping port C using the chain drive motor 2j, and then the motor 2j and the hydraulic cylinder 2ka
is operated in the backward direction to gradually retreat the refractory ejector/fi-pu, while at the same time operating the extrusion hydraulic cylinder 4a to advance its piston 4d into the refractory pouring pipe 1, thereby removing the internal refractory block A. The refractory is extruded and gradually poured out from the nozzle hole ld at the tip toward the inner wall of the tap hole C, and the refractory poured out like a trowel board by the gunwale la at the tip is applied to the inner wall of the tap hole C. The refractory is coated on the entire inner wall of the tap hole C, and the refractory is dried and fired by the heat in the converter B. Once the coating operation is completed, the apparatus can be removed in the reverse order of the above-mentioned setting operation. (Second Embodiment) The second embodiment shown in FIGS. 10 and 11 is an example of the first embodiment in which the refractory material extrusion device 4 is a screw feeder, and ld in the figure is a screw feeder, le is the support bearing of the same screw feeder, lf is the rotating shaft that rotates together with the screw feeder ld, 1g
is a rotary drive motor, 4c is a refractory press cylinder, 4
f is a piston village 4g is a hydraulic cylinder mounting device, 4h is a pivot of the same hydraulic cylinder mounting plate, 4i is a clamp, and the widened part la and nozzle hole lb are separated so that they can be rotated by the rotation axis lf. There is.

The second embodiment is the same as the first embodiment except for the extrusion method and extrusion state of the refractory material.

In this embodiment, the fireproof block A is the hydraulic cylinder mounting plate 4.
g is introduced into the refractory press chamber 4c, the hydraulic cylinder-mounting plate 4g is closed and fixed with the clamp 4i, and the refractory is injected while operating the hydraulic cylinder 4e and lowering the press plate 4d. While being pushed into the pipe, it is conveyed forward by the rotation of the screw feeder ld, and is discharged from the nozzle hole lb at the tip. An additional advantage is that the refractory can be applied uniformly to the inner wall. (Third embodiment (see Figures 12, 13, 14)
) The third embodiment is designed to facilitate the replacement of the refractory block A, and instead of the suspension centering adjustment cylinder 3d in Fig. 1 of the first embodiment, a winding wire 3o is used. In addition, the refractory pouring pipe 1 can be separated into two parts near the base end, and can be easily attached and detached.
A locking groove lh on one refractory pipe 1 and a locking pin l on the other
The structure is the same as that of the first embodiment except that the structure has i. In this third embodiment, when adjusting the centering, it is done by adjusting the length of the take-up wire 3o, and when replacing the fireproof block A, the take-up wire 3o is adjusted as shown in FIG.
o is lengthened so that the refractory outlet pipe 1 is allowed to hang down and replaced with a new refractory outlet pipe filled with refractory block A as shown in FIG.

(Fourth embodiment (see Figs. 15 and 16)) The movement of the moving machine frame 3 shown in Figs. 15 and 16 is changed to the Atsushi cart movement method instead of the hanging method shown in Fig. 1 of the first embodiment. In the figure, 3p is the plywood of the mobile frame 3, 3q is the lo-fu,
3r is a moving cylinder, 10' is a moving vehicle for moving left and right, 10a is a wheel, 10b is a drive motor, 10
c is shir.

In this embodiment, the entire moving machine frame 3 is moved left and right by the moving vehicle 101 on which it is remounted, and the movement of the advancement/retraction device 2 in the direction of the tapping port C is performed by the cylinder 3r.

FIG. 16 is a modification example in which a lifter 10d is added to the moving vehicle 10 of FIG. 15, and the rail 10c is omitted. (Fifth embodiment (see FIG. 17)) The fifth embodiment shown in FIG.
1b is a pivot, 11c is a circular orbit, and 11d is a roller.

This embodiment is the same as the fifth embodiment except that the advancing/retracting device 2 and the moving machine frame 3 are mounted on the turning table 11, so that the fireproof block A can be easily replaced and inspected and repaired simply by turning it. be.

Figures 18 to 24 show various structural examples of the tip of the refractory discharge nozzle 1. Figure 18 is a standard structural example, Figure 19 is a standard structural example,
The figure shows one in which the widened part la and spout hole lb can rotate like those shown in Figures 10 and 11, and the one shown in Fig. 20 shows one in which a cooling chamber li is provided inside the widened part la, and a cooling water pipe lk is provided in this. FIG. 21 shows its longitudinal section.

FIG. 23 shows a pipe in which a plurality of steam jacks 11 are provided around the outer periphery of a refractory pouring pipe, which is used for refractories including resin and tar-based refractories. In FIGS. 23 and 24, the tips are screwed together. It is removable and allows the insertion tip of the refractory block A to be replaced. [Effects of the Invention] As described above, according to the present invention, the refractory existing pipe is advanced to the inner side mouth rim of the converter tap port, and then the refractory pouring pipe is gradually retreated, and at the same time the refractory By pouring and applying it to the inner wall of the refractory outlet, the eroded portion of the refractory layer can be repaired very easily and in a short time, and the repaired refractory layer is evenly and uniformly formed, resulting in a good finish. Furthermore, since the device is simple and can be performed by mechanical operation, it has the effect of improving hygiene.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a first embodiment of the converter tap port repair device of the present invention, FIG. 2 is a front view of the same embodiment, FIG. 3 is a front view showing the converter tap port, and FIG. The figures are a perspective view showing a refractory pushing device, FIG. 5 is a perspective view showing another example of the advancing/retracting device, and FIG.
The figure is a perspective view showing another example of the loading door, Figures 7 and 8 are side views showing a modification of the first embodiment, Figure 9 is an explanatory view showing the clamp mechanism, and Figure 10 is the second embodiment. FIG. 11 is a perspective view of the same, FIG. 12 is a side view of the third embodiment, and FIG. 13 is a state in which the refractory ejection pipe of the third embodiment is replaced. 14 is an explanatory diagram showing the replacement method, FIG. 15 is a side view showing a modification of the third embodiment, FIG. 16 is a side view showing the fourth embodiment, and FIG. 17 is a side view showing the fifth embodiment. A perspective view showing the embodiment, and FIGS. 18 to 24 are explanatory views showing the structure of the tip of the refractory ejection pipe. A... Fireproof block, B... Converter, C
... Steel tapping port, 1 ... Refractory ejection pipe, 2 ... Advancement and retreat device, 3 ... Mobile machine frame,
4... Refractory extrusion device. Figure Boat Figure 2 Figure 3 Dimensions Vertical View Mountain Rudder Figure 6 Figure 7 Figure 8 Figure 9 Figure 10 Figure 11 Figure 12 Figure 13 Figure 14 Figure 15 Figure 16 Figure 17 Figure 18 Figure 19 Figure 20 Figure 21 Figure 22 Figure 23 Figure 24

Claims (1)

[Claims] 1. A refractory pouring pipe whose tip is widened and a pouring hole is provided at the rear of the pipe is advanced to the furnace side opening end of a converter tap, and then the refractory pouring pipe is gradually inserted. A converter tap hole repair method characterized by pouring refractory from a spout hole and applying it to the inner wall of the tap hole while retreating. 2 Converter tapping port repair by attaching an advancing/retracting device to a refractory pouring pipe whose tip is widened and a pouring hole is provided at the rear position, and a refractory pushing device is installed at the base end of the refractory pouring pipe. Method.