JPS621519B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hot water outlet for a kiln such as a converter or a DH furnace (here, the hot water outlet refers to a hot water pouring outlet such as a tap hole, a tap hole, a furnace sprue, etc.) This invention relates to a repair method that can efficiently form a strong internal fireproof layer on an inlet or suction pipe.

Conventionally, for example, when tapping steel from a converter, the inner wall of the tap hole would be eroded due to the molten steel, and as the diameter gradually increased from the initial diameter and the tap time became shorter, the molten steel would scatter more, and the rate of slag contamination would increase. There are problems such as an increase in

Therefore, usually it is necessary to tap steel within a certain range of time, so between each tap, a refractory material is placed on the tip of a spoon-shaped trowel and applied to the inner wall of the tap hole. There is a way to repair the reduction. However, this method requires manual work and must be done next to a hot converter.
The work was grueling and extremely dangerous. Furthermore, since the refractory material is simply applied to the inner wall using a trowel, the thickness is uneven and the pressure bonding force is also weak, making it impossible to obtain sufficient bonding strength. It is an object of the present invention to provide a method for repairing a hot water outlet, which eliminates these drawbacks, allows a refractory layer of uniform thickness to be easily and quickly formed, and provides sufficient bonding strength to the refractory layer. shall be.

In order to achieve the purpose of the method for repairing a hot water outlet of the present invention, a trowel is placed inside the hot water outlet of a kiln,
The method is characterized in that the trowel is moved in the axial direction while being rotated, and the trowel coating is performed at the same time as the refractory material is poured onto the inner wall of the hot water outlet.

As a result, the applied refractory material is applied to the inner wall of the hot water outlet with sufficient adhesion using a trowel, and a refractory material layer with a high packing density and a smooth surface is obtained. In addition, it is possible to eliminate the unevenness on the inner wall of the hot water outlet before repair, making it possible to finish the inner wall with the same excellent surface condition as when it was first manufactured. In other words, the refractory material is selectively filled in the areas that are low as a result of erosion, and are finished flush with other areas.

The present invention will be described below using embodiments shown in the accompanying drawings.

FIG. 1 shows the overall structure of a repair device used in the repair method according to the present invention, and the device essentially consists of a repair pipe C that advances and retreats inside the tapping port B of a converter A, Mechanism D that can rotate and freely move forward and backward;
It is composed of an alignment mechanism E, a suspension device F, and a supply device G for refractory materials, oxygen gas, and hydraulic oil. Also the second
The figure shows the details of tap hole B, where a is the refractory layer and b is the adhered metal and slag. To explain the structure of the above repair device in more detail, in Figs. 1 to 3, 1 is a large pipe, 2 is a small pipe, 3 is a trowel, 4 is a refractory material feed path, and 4' is a refractory material injection path. The outlet 5 is an oxygen gas supply path, 5' is a communication path, and 6 is an opening through which oxygen gas can be blown out.

Next, to describe the details of the repair equipment, 7 is the machine frame, 8 is the running platform with the repair pipe C attached, and 8'
10 is a cylinder support that supports the guide tube 10', 9 is a hydraulic cylinder that drives the traveling platform, 10 is a worm wheel disposed around the middle of the large pipe 1, 10'
1 is a guide tube, 11 is a worm that meshes with the worm wheel, 12 is a hydraulic motor that rotates the worm, 13 is a wheel of the traveling platform, 13' is a guide rail for the wheel 13 attached to the machine frame 7, and 14 is a machine frame. 7
14' is the alignment hole of the alignment rod, 15 is the magnetic coil, 16 is the steel reaction base plate, 17 is the hoist that supports the entire machine frame 7, repair pipe C, etc. , 18 is a spring, 19
19 is an I-shaped rail, 19' is a traveling mechanism for causing the hoist 17 to run along the I-shaped rail 19, 20 is a refractory material supply hose, 21 is an oxygen gas supply hose, 22
indicates a hydraulic hose. Further, in FIG. 5, 1'' is a refractory material feeding pipe, 3'' is an oval iron, 4'' is a refractory spout, and 23 is a holding portion for the iron.

In this embodiment, the traveling mechanism 19' moves the entire repair pipe C, machine frame 7, etc. along the I-shaped rail 19 in the direction of the tapping port B, and then the hoist 17 moves the repair pipe C and the machine frame 7 to the desired position. and further move the alignment rod 14 toward the alignment hole 14' of the reaction force base plate 16.
The traveling mechanism 19' is operated again so as to penetrate the object. As the alignment rod 14 penetrates into the alignment hole 14', the height, horizontal direction, and inclination of the entire alignment rod 14, repair pipe C, machine frame 7, etc. are finely adjusted, and these changes are made by a freely displaceable mechanism. as spring 18
It is caused to escape by the elastic displacement of. Aligning rod 1
If the magnet coil 15 is energized after the magnet 4 has completely penetrated into the alignment hole 14', the magnetic force of the magnet coil 15 will cause the steel fixed to the machine frame 7 side of the magnet coil 15 and the furnace side to Reaction force base plate 1
6 are attracted to each other, and the machine frame 7 becomes fixed.

In this way, when aligned, the repair pulp C and the tapping port will be in positions and orientations that accurately correspond to each other. If the hydraulic cylinder 9 is then operated while maintaining this state, the traveling platform 8 and the repair pipe C attached thereto will move forward and backward. Thereafter, the hydraulic motor 12 is operated to rotate the repair pipe C via the worm 11 and the worm wheel 10. This rotation causes the trowel 3 to rotate together with the repair pipe 3. In the repair work, starting from this preparatory work, the hydraulic cylinder 9 is operated and the repair pipe C is inserted into the tap hole B. In addition, in this embodiment, it is possible to remove slag, bare metal, etc. before the troweling work, as necessary.
1. Through the small pipe 2 and the communication path 5', high-pressure spray is applied from the opening to cause a flame state on the inner circumferential wall of the tapping port B, and as the repair pipe C rotates, the oxygen gas is sprayed onto the inner circumferential wall surface. This is done by applying it evenly. Repair pipe C to hydraulic cylinder 9
is operated to run through the tap hole B, and the metal and slag b on the inner circumferential wall of the tap hole B are melted by the flame, and the metal and slag b melted by high-pressure spraying of the flame. Blowing b into the inside of path A. If necessary, the repair pipe C may be moved back and forth through the tapping port B several times to completely melt and blow off the metal. After melting and blowing away the base metal and slag B, the refractory material inside the large pipe 1 is sent out from the feeding path and poured into the tapping port B through the opening 4'. Repair pipe C while pouring or after pouring
When the small pipe 2 is moved back, an elliptical iron 3 with a smooth curvature and a height equal to the diameter of the tap hole B moves inside the tap hole B and is attached. Apply the refractory material uniformly and with sufficient pressure to tap hole B. At this time, since the iron 3 is in a rotating state, the crimped refractory layer can be made uniform and smooth, and the bonding strength can also be improved. In addition, the rotational retreat of the repair pipe C can also prevent the repair pipe C and the iron 3 from seizing on the tapping port B. After the repair work is completed, the hydraulic cylinder 9 is operated to advance and retreat, the steel is pulled out from the tapping port B, the magnet coil 15 is de-energized, and the traveling mechanism 19 is activated to move the steel back, thereby completing the work.

Note that the repair pipe shown in Fig. 5 does not generate flame, and the refractory material is simply poured out from the refractory material spout 4'' of the refractory material supply pipe 1'', and it is evened out with a trowel 3''. Figure 6 shows an example of a modification of the repair pipe, in which the tip of the small pipe 2 is widened into a floppy shape, and a conical diffuser plate 24 is installed in the widened part in a predetermined manner. 25 is a support fitting for attaching the diffuser plate 24 to the widened part. In this repair pipe, fuel or oxidizing gas passes through the space between the diffuser plate 24 and the inner wall of the widened part of the small pipe 2 to form a cone. It is sprayed onto the inner wall of the hot water outlet.

As described above, according to the present invention, a smooth refractory material having a uniform thickness can be easily and quickly applied to the inner wall of the hot water outlet, and sufficient bonding strength can be imparted.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the repair device used in the hot water outlet repair method according to the present invention, Fig. 2 is an enlarged sectional view of the repair pipe, and Fig. 3 is taken along the line shown in Fig. 2. Cross-sectional view, Figure 4 is the same side view, Figure 5 is the same side view.
FIG. 6 is an explanatory diagram of an example of modification of the repair pipe. A: Converter, B: Steel tap, C: Repair pipe, D:
Rotating forward/backward mechanism, E: Aligning mechanism, F: Hanging device,
G: feeding device, 1: first pipe, 2: small pipe,
3: insert body, 4: refractory material feed path, 5: flame gas feed path, 1'': pipe, 3'': trowel, 4'': refractory spout, a: refractory layer, b: metal, slag .

Claims (1)

[Claims] 1. A hot water distribution method characterized in that a trowel is placed in the hot water flow opening of a kiln, and the trowel is moved in the axial direction while rotating, and trowel coating is performed at the same time as the refractory material is poured onto the inner wall of the hot water flow opening. How to repair your mouth.