JPS594037Y2 - Blast furnace air tuyere - Google Patents

Description

[Detailed description of the invention] The present invention relates to a siding for blast furnaces, in which a conical ring having an outer periphery that matches the conical tuyere bearing surface of the blast tuyere cutout at the siding base is inserted into the siding base and welded. By fixing the siding, when reusing the siding after use, the deformed joint at the base of the siding can be removed by turning and removing the deformed periphery, and then the siding can be thickened to an excessive diameter. This method eliminates the build-up work in the conventional modification method of finishing the outer periphery of a truncated cone with predetermined dimensions by applying build-up, and simplifies the work of finishing the outer periphery after build-up. The purpose is to prevent structural changes and thermal stress distortion.

The structure and operation of the blast furnace blowing panel of the present invention will be explained in detail below with reference to the drawings.

FIG. 1 is a front sectional view showing an embodiment of the blast furnace tuyere of the present invention, and FIG. 2 is a side view thereof.

Reference numeral 1 denotes a blast furnace air blower, which is constructed by welding the tip of a steel casting (Cu) to the body 2 of the same, and 4 the body 2.
5 indicates a cooling water passage in the tip portion 3, and 5 indicates a cooling water passage in the tip portion 3, respectively.

6 is a cooling water supply port to the body 2, and 7 is its discharge port.

Reference numerals 8 and 9 are a cooling water supply port and a discharge port for the tip portion 3, respectively, and the supply port 8 and the drain port 9 are connected to a water supply pipe 8' and a water supply pipe 8' disposed in the cooling water passage 4 of the body portion 2, respectively. It is provided so as to communicate with the cooling water passage 5 of the tip portion 3 via a discharge pipe 9'.

10 is a copper material (Cu) welded to the base of the blast furnace tuyere 1.
A truncated conical ring made of C or CuP) or cast iron with extremely high thermal conductivity, and the outer periphery is surrounded by air blowing tuyeres 11
(indicated by chain lines in Figure 1) frusto-conical blow tuyere bearing surface 1
1'.

Regarding the wall thickness of the truncated conical ring 10, for example, 3~
It is desirable to prepare in advance a plurality of stages so as to correspond to the amount of removal of the outer periphery in accordance with the degree of deformation of the base of the used ventilation blade 1 within the range of 8 mm.

Generally, the tip of the blast furnace siding becomes unusable due to melting and water leakage, and it must be removed and replaced with a new one. The so-called parent-child blower tuyeres, which are equipped with separate cooling water passages for each system, are difficult to melt and damage at the tips, and even if the tips are melted, it is easy to repair just the tips and can be reused. It is.

When reusing such ventilation panels, the outer peripheral joint of the panel base is generally severely deformed to the extent that it cannot fit the panel bearing surface of the cutter, so the deformed joint of the panel base is After turning a part of the outer periphery of the part and adding overlay to an oversized diameter, the outer periphery is machined into a truncated conical outer periphery of a predetermined size that fits the tuyere bearing surface of the Kirikasu. There is.

The ventilation siding of the present invention is intended to omit the above-mentioned build-up work, simplify the high-precision mechanical finishing work after the build-up, and streamline the repair work of the joint at the base of the siding. By providing a truncated conical joint surface that requires a ring-shaped part so that it can be processed separately from the tuyere body, so-called mass production such as machining or precision casting using a numerical control method or jig method is possible. It is possible to process by this method, and therefore it significantly contributes to reducing the number of processing steps.

Furthermore, the machining work for machining the outer periphery of the base of the ventilation blade into a shape that matches the inner periphery of the truncated conical ring 10 is based on the premise that the truncated conical ring 10 will be welded. It does not require high-precision mechanical finishing work such as machining the outer periphery of the joint of the base of the air sluice to the tuyere bearing surface, and can be completed with a number of man-hours slightly exceeding the number of man-hours required for turning before the above-mentioned build-up work. I can do it.

As explained above, the blast furnace air lining of the present invention omits the build-up work that was commonly done in the past when modifying the air lining for reuse after it has been used, and the truncated conical surface after the build-up work is The purpose originally stated was to simplify high-precision machining of the joint surface of the outer periphery of the shape, significantly streamline the modification work for reuse, and prevent the occurrence of structural changes and thermal stress distortion caused by build-up work. are completely distant relatives.

[Brief explanation of drawings]

FIG. 1 is a front sectional view showing an embodiment of the blast furnace air blowing system of the present invention, and FIG. 2 is a side view thereof. Brief description of the drawings below: 1: Blast furnace air lining, 2: Body of blast furnace air tuyere 1, 3: Tip of blast furnace air tuyere 1, 4: Cooling water passage of body 2, 5: Tip of tip 3. Cooling water passage, 6: Cooling water supply port for the body 2, 7: Cooling water drain port for the body 2, 8: Cooling water supply port for the tip 3, 8': Cooling water supply pipe for the tip, 9 : Cooling water discharge port for the tip part 3, 9': Cooling water discharge pipe for the tip part 3, 1
0: truncated conical ring, 11: blow tuyere cutlet (blow tuyere housing hardware), 11': blower tuyere cutlet 11
Blower tuyere 1 bearing surface.

Claims (1)

[Scope of utility model registration request] A truncated conical ring with an outer circumferential surface that matches the truncated conical tuyere support surface of the tuyeres (blast tuyere housing hardware), and a truncated conical ring with an outer circumference of the tuyere base attached to the inner periphery of the above truncated conical ring. What is claimed is: 1. A blast furnace winding panel comprising a winding panel formed in a shape that conforms to a surface, the truncated conical ring being inserted into the base of the blasting panel and fixed by welding.