JPS5922108Y2 - Latch type bottom for converter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a latch-type bottom for a converter, and its purpose is to ensure attachment to the converter body and to facilitate attachment and detachment of the bottom.

The bottom of a bottom-blown converter is usually circular, with a refractory material such as tuyere bricks on the top of the bottom plate, and tuyere headers and piping equipment on the bottom.

During continued operation, the refractories such as the siding become damaged, and the bottom requires maintenance, which requires the bottom to be attached and removed.

The conventional method of attaching the bottom to the furnace body is shown in Figures 1 and 2.
Shown in the figure.

FIG. 1 is an overall view of the bottom of a conventional example, where A is a plan view and the mouth is an explanatory view showing a cross section, and FIG. 2 is a partially enlarged view.

As shown in the figure, in the conventional bottom part, a disc-shaped bottom plate 1 is attached to a seat 2 of a converter body, and bolts 3, nuts 4,
It is attached using a latching device consisting of a claw 5 and a hook 6, but this method has the following drawbacks.

(a) It is necessary to arrange latching device mechanisms at 10 to 30 locations around the outer periphery so that the mounting force does not act locally on the furnace body and bottom, resulting in high cost.

(b) In the same case as above, the work of attaching and detaching the bottom is complicated because 10 to 30 mechanisms must be operated.

(c) Since the bottom is pressed against the furnace body, a large mounting force is required, and a uniform mounting force is required, making the mounting work difficult.

Therefore, from the point of view of converter operability and labor saving, it is possible to quickly and accurately attach and detach the bottom.
It is hoped that a simple, safe and strong bottom structure will emerge.

The present invention meets the needs of the technical field as described above and provides a latch-type bottom that overcomes the drawbacks of the prior art.

The present invention is a converter bottom equipped with a tuyere header on the top surface of the bottom plate and a tuyere header on the bottom surface. The latch of the bottom plate is inserted into a hole of the same shape as the latch provided in the seat of the converter body, and the bottom plate is attached to the bottom of the furnace by turning it. This is a latch-type bottom for a converter that has a structure in which a ring plate screwed onto the bottom plate is tightened and fixed.

Next, details of the present invention will be explained based on the drawings.

The drawings are explanatory diagrams of one embodiment of the present invention, in which Fig. 3 is an overall view of the bottom part, A is a plane, and the mouth is a schematic diagram showing a cross section, and Fig. 4 is a cross section of the bottom/furnace body assembly. FIG.

This invention has three or more locations on the outer periphery of the bottom plate 1 (the figure shows four locations).
The latch 12 is inserted into a hole of the same shape as the latch 12 provided in the seat 2 of the converter body, and the bottom plate 1 is fitted with an angle of 360° corresponding to the number of latches. Attach the bottom to the furnace body by rotating.

The bottom installed in this manner is tightened with bolts 14 of the ring plate 13 screwed onto the bottom plate 1, so that the bottom is completely fixed so that it does not move even when the furnace body is tilted.

Finally, the gap created between the bottom brick 9 and the furnace brick 11 is closed with a heat-resistant material 10 such as a brick or a monolithic refractory to complete the process.

Note that when the bottom of the present invention is to be removed from the furnace body, the purpose can be easily achieved by performing the reverse operation of the above-mentioned installation.

As is clear from the above description and drawings, in the latch type bottom for converter of the present invention, the bottom's own weight and the molten steel load can be used as the force for attaching the bottom to the furnace body.
There is no need for mounting equipment for heavy loads like in the past, and it is sufficient to have enough mounting force to withstand the weight of the bottom when the furnace body is inverted.

Therefore, since the device design and installation work are easy, it has a great effect on improving the operating efficiency of the converter and reducing costs.

[Brief explanation of drawings]

Fig. 1 is an overall view of the bottom, A is an explanatory diagram showing a cross section of the planar opening, Fig. 2 is a partially enlarged view, Fig. 3 is an overall view of the bottom of the present invention, and A is a schematic diagram showing a cross section of the planar opening. FIG. 4 is an explanatory diagram of a cross section of the bottom/furnace body assembly. 1...Bottom plate, 2...Seat of converter furnace body, 3.
... Bolt, 4... Nut, 5... Claw, 6... Hanging bar, 7... Tuyere, 8... Tuyere header, 9...
Bottom brick, 10... Heat resistant material, 11... Furnace brick, 12... Latch, 13... Ring plate, 1
4...Bolt.

Claims (1)

[Scope of utility model registration request] Bottom play 1~ In the converter bottom with a siding brick on the top surface and a siding header on the bottom surface, the bottom plate consists of a circular plate with three or more latches on the outer periphery and a ring plate screwed onto the plate. , Insert the latch of the bottom plate into a hole of the same shape as the latch provided in the seat of the converter body, turn it and attach it to the furnace body, and tighten the ring plate screwed onto the bottom plate. A latch-type bottom for converters, which is characterized by being fixed in place.