JPS5895185A - Core for pouring in amorphous furnace material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a core used when constructing a wear lining on a side wall of a molten metal container using an unshaped furnace material for pouring.

Taking a molten steel ladle as an example of a molten metal container, generally speaking, as shown in FIG. 1, there is a permanent lining 2 inside a steel shell 1, and a wear lining 3 further inside. Since the wear lining 3 is worn out as it is used, it is repaired or dismantled and rebuilt after being used for a certain period of time.

The degree of wear of the wear lining is not uniform in the circumferential direction and the height direction of the molten steel ladle. Furthermore, since the iron shell itself is complexly deformed after long-term use, it is difficult to properly construct, add, and repair the core with the conventionally used core of a fixed shape.

The present invention provides a pouring core (hereinafter referred to as core 1) which is particularly effective for repairing or repairing the side wall of a molten metal container that has been deformed or unevenly worn as described above. ), and the problem is that a core is constructed by combining a plurality of steel plates equipped with a construction thickness measuring tool and flexible plate-like materials, and the shape of the core is set. A core for pouring unshaped furnace material is characterized in that an expandable support rod is disposed within the core.

The present invention will be described in detail below based on the illustrated embodiments.

Example 1 One example of a core used in a conical molten steel ladle is shown in FIG.

The core 4 includes an even number of inverted trapezoidal steel plates 5 having arcuate curved surfaces and an even number of inverted trapezoidal flexible plate materials (hereinafter referred to as "flexible plates").
) 6 are arranged alternately and assembled into a conical shape, and the material of the flexible plate is typically rubber. The number of plates is determined depending on the size of the molten steel ladle, but is at least 4 pieces each, preferably 8 pieces or more, and may be an odd number of pieces. The steel plate 5 and the flexible plate 6 are connected to each other by screws or the like.

FIG. 3 shows a cross section of FIG. 2. The steel plate 5 is connected to the support column 7 by a support rod, for example, a tie rod with a turnbuckle for steel plate (hereinafter referred to as "tie rod j for steel plate") 8, and the distance between the steel plate 5 and the support column 7 can be set by the turnbuckle. It has become.

The planar arrangement is radial from the pillars 7, and in the embodiment eight are provided. The steel plate 5 is equipped with screws for setting the construction thickness (hereinafter referred to as "distance measuring screws").
A hole is drilled and a female screw is attached to the inner surface of the steel plate 5, but this is not shown in FIG. The vertical arrangement of tie rods for steel plates is determined by the size of the molten steel ladle, but generally there are 3 to 4 locations.
, watered with l//.

FIG. 4 shows a cross section taken along line IV-IV in FIG. 2. In order to provide structural strength to the flexible plate 6, a backing steel plate 9 having an arcuate curved surface is attached with screws or the like, and a support rod such as a tie rod with a turnbuckle for the flexible plate (hereinafter referred to as "flexible plate A tie rod (referred to as "tie rod") 10 is attached to the backing steel plate 9. The vertical and planar arrangement of the flexible plate tie rod is the same as that of the steel plate tie rod, and in Fig. 2, the TV
-IV'.

FIG. 5 shows a cross section taken along the line ■-■ in FIG. 2. A plurality of distance measuring screws 11 are attached to the steel plate 5 through the steel plate 5 to set the distance between the side wall surface of the molten steel ladle and the core, that is, the construction thickness. The distance measuring screw is held by a female screw 12 attached to the inner surface of the steel plate 5. The vertical arrangement of the distance measuring screws 11 is determined by the size of the molten steel ladle, but generally there are 4 to 5 locations.
”, V///.

Next, the procedure for pouring into a molten steel ladle using the core described above will be described. First, lift up the support 7 a little so that the core is in a contracted state, and use a crane to lift it into a molten steel ladle. After screwing in, operate the turnbuckle on the steel plate tie rod to expand the core until the distance measuring screw touches the wall surface, then operate the turnbuckle on the flexible plate tie rod to ensure that the entire core has a bf smooth curved surface. Then, pouring material is simultaneously poured into the gap between the molten steel ladle and the core from four symmetrically located locations to form a wear lining, and then the distance measuring screw is removed and the wear lining is in progress. The holes created in the building are injected with pouring material to fill them up, then the pillars are lifted slightly to shrink the entire core, and the core is lifted out with a crane to complete the construction work.

Example 2 Another example of the core used for a conical molten steel ladle is the sixth example.
As shown in Fig. 7.

The core 4 is assembled into a conical shape by alternately arranging an even number of inverted trapezoidal steel plates 5 having arcuate curved surfaces and an even number of inverted trapezoidal flexible plates 6. The width of the flexible plate 6 is considerably smaller than the width of the steel plate 5, usually about 1/10. The number of plates is determined by the size of the molten steel ladle, but is 4 pieces each, or at most 8 pieces each.

FIG. 7 shows a cross section taken along line 1--2 in FIG. 6. Steel plate 5 and flexible plate 6
are connected with screws, etc. Holes are formed in the steel plate 5 so that a plurality of distance measuring screws 11 can be attached thereto, and male screws 12 for holding the distance measuring screws are attached thereto. A pair of support rods (for example, tie rods with turnbuckles) (hereinafter referred to as tie rods 1) 1 are installed near both circumferential ends of the steel plate 5.
3 is attached, and the vertical arrangement of the pair of tie rods 13 and distance measuring screws 11 that connect the steel plate and the support 7 is determined by the size of the molten steel ladle, but generally,
There are 3 to 4 locations, and in Fig. 6, they are ■, ■1'■''.

The procedure for pouring into a molten steel ladle using the above core will be described.

First, lift up the support column 7 a little and put the core in a contracted state.
Use a crane to suspend the steel plate 5 into a molten steel pot, and then insert a distance measuring screw into the steel plate 5 by the same length as the construction thickness (for example, 100 mm).
Then, operate the tie rod turnbuckle to expand the core until the distance measuring screw touches the wall.
Next, pouring material is simultaneously poured into the gap between the molten steel ladle and the core from four symmetrically located locations to form a wear lining, after which the distance measuring screw is removed and the pouring material is poured into the created hole. The filling process is completed by injecting the material and filling it, then lifting the support a little to shrink the entire core, and lifting the core out with a crane.

In Examples 1 and 2, columns are provided, but the columns may not be provided and opposing steel plates may be connected by one tie rod with a turnbuckle. Furthermore, in addition to a tie rod with a turnbuckle, a fluid cylinder or the like can be used as the support rod.

As explained in detail above, the core of the present invention can be constructed and repaired by arbitrarily setting the shape of the core, and especially if the pot is complexly deformed, the wear and tear will wear out unevenly. It has an excellent effect on those that use it.

[Brief explanation of the drawing]

Fig. 1 Hard sectional view of the molten steel ladle Fig. 2 External view of the core of Example 1 Fig. 3 Fig. 2
Figure 4: Cross-sectional view along the line-■ in Figure 2. Figure 5: Cross-sectional view along IV-TV in Figure 2. Figure 6: Cross-sectional view along line V-V in Figure 2. Figure 7: External view of the core of Example 2. ■-■ Cross section of the figure

Claims (1)

[Claims] A core is constructed by combining a plurality of steel plates equipped with a construction thickness measuring tool and flexible plate-like materials, and an expandable support rod is placed inside the core to set the shape of the core. A core for pouring unshaped furnace materials.