JPH0328482B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for fixing locking bricks during blast furnace stave casting.

(Prior art) The basic structure of a stave is to have a steel pipe that forms a refrigerant passage on the side of the steel shell, and a cast-locking brick on the inside of the furnace, which are integrally cast together. There is.
Conventionally, casting bricks were attached to the inner surface of a mold using an adhesive, and then molten metal was poured into the mold.

(Problems to be Solved by the Invention) However, with the conventional casting method, when molten metal is injected into the mold, the adhesive deteriorates, and the injection pressure of the molten metal causes problems in the casting process. The binding bricks were moving and rising to the surface of the upper mold.

(Means for Solving the Problems) The present invention advantageously solves these problems of the prior art, and its gist is to fix a cast-locking brick in a mold, and to In the method of manufacturing castings by pouring molten metal, a locking brick is attached to the inner surface of the mold with an adhesive, and then a jig made of a steel plate with an arbitrary thickness and height is attached to the back of the locking brick. This is a method of fixing bricks to prevent them from moving and floating during pouring.

(Example) Hereinafter, the present invention will be explained in detail based on the drawings.

As shown in FIG. 1, a locking brick 2 is attached to the inner surface of a mold 1 with an adhesive, a fixing jig 3 is arranged on the back side of the locking brick 2, and a steel pipe 4 forming a refrigerant passage is provided.
It is integrated with the above. At this time, the fixing jig 3 is equipped with round steel columns at both ends of the main body made of steel plate, and the columns are buried in the side of the sand mold, and the cast-in brick 2
Fix it on the back of the

FIGS. 2 and 3 show other examples in which the furnace wall bricks are integrally cast into the stave. At this time as well, the arrangement of the fixing jig 3 is the same as in FIG.

FIG. 4 shows the structure of the fixing jig 3. It consists of a jig main body A made of a steel plate having an arbitrary thickness and height, and a round steel support B for fixing this main body on the casting brick. The R dimension of the part of the jig body A that is in contact with the back of the casting brick is an arbitrary dimension that is concentric with the blast furnace, and the L dimension of the sand mold buried part of the support B is an arbitrary dimension that allows the jig body A to be fixed. .

In this example, the supports B are provided at both ends of the jig main body A, but the support is not limited to this, and the jig main body A may be extended.

(Effects of the Invention) As described above, according to the present invention, it is possible to prevent bricks from moving and floating during casting, regardless of the number and size of the cast-locking bricks, and the quality of the product after casting can be improved. can be achieved.

[Brief explanation of the drawing]

Figures 1 to 3 are explanatory diagrams of examples of molds to which the method of the present invention is applied. Figures a and b are diagrams showing the case of fixing a combination of large-sized bricks and small-sized bricks, and b is a sectional view of a, and Figure 3 a,
b is a diagram showing a case where large-sized bricks and medium-sized bricks are fixed in parallel, b is a sectional view of a, and FIG. 4 is an explanatory diagram of a brick fixing jig. In the figure, 1...Sand mold, 2...Small size casting brick, 3...Brick fixing jig, 4...Cooling steel pipe,
5...Large size cast-in brick, 6...Medium-sized cast-in brick, A...Brick fixing jig main body, B...Brick fixing jig support.

Claims (1)

[Claims] 1. In a method of manufacturing a casting by placing a locking brick and a cooling steel pipe, which are members for forming a blast furnace stave, in a mold and injecting molten metal into the mold, the back side of the locking brick is A method for fixing a bracket brick during casting of a blast furnace stave, characterized by arranging a fixing jig and integrally casting these.