JPH0336882B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a brick casting method for a stave cooler used for cooling the walls of a blast furnace.

(Prior Art) Conventionally, when bricks were cast into a stave cooler, cracks occurred in the bricks. In order to eliminate this rift,
When bricks were cast, insulating cushioning material was pasted on both sides of the bricks (Special Publication No. 8241/1983).
(Technology described in Japanese Patent Publication No. 52-31811). This method has been adopted as a countermeasure against the problem that when solid bricks are cast with molten iron at temperatures around 1300℃, cracks occur on the inner and outer surfaces of the bricks, making them unstable as stave bricks. The role of this insulating cushioning material is to alleviate thermal shock and to avoid shrinkage cracks in the main body of the stave cooler, and rock wool or the like is used as the material.

(Problems to be Solved by the Invention) However, in the above method, not only is the cost of the rock wool high, but also the work efficiency is poor because the rock wool is manufactured by pasting it on the bricks. Furthermore, the material of the stave is different around the bricks, which can be an impediment to achieving efficient temperature distribution (heat conduction through the bricks).

Further, when manufacturing a stave cooler by pasting rock wool, the thickness of the rock wool becomes less than half of the original thickness at the time of casting. For this reason, a gap is created between the refractory bricks and the rock wool, resulting in a structure in which the refractory bricks are inserted loosely. Therefore, there was a risk that the refractory bricks would be pulled out due to vibrations, etc., and the pulled-out portions were sometimes chipped.

(Means for Solving the Problems) The present invention has been made for the purpose of solving the disadvantages of this prior art. In the brick casting method for a stave cooler having refractory bricks on the side, the refractory bricks on the side that contact the casting to be cast are covered with a metal plate before being cast, and the metal plate covering the refractory brick is poured. This is a method in which multiple sheets are stacked and cast.

(Function) Since the sides of the refractory bricks are covered with metal plates and then cast, the heat input at the initial stage of pouring is transferred to a certain amount of refractory bricks, and the bricks are preheated. Therefore, it acts to alleviate the thermal shock at the initial stage of pouring. In addition, since the metal plate material can be deformed, it can be expected to absorb the shrinkage force during contraction, and since there are no foreign substances between the base material and the brick, appropriate heat conduction can be expected.

(Example) The present invention will be explained in detail below using one example.

As an example, a plurality of trapezoidal refractory bricks 1 with the working surface side of the stave cooler slightly shortened (four in this embodiment) are arranged in several rows in parallel (three rows in this embodiment). After applying a metal plate material 2 made of the same metal as the molten metal to be poured to both sides, for example, a material similar to the metal plate material 2 is applied so that the metal plate material 2 is pressed against the side surface of the refractory brick 1. A plurality of C-shaped bands 3 are provided so as to sandwich the firebrick 1 and the metal plate 2.
When pouring metal in this state, the heat retained in the poured molten metal is conducted to the refractory brick 1 via the metal plate 2. On the other hand, most of the C-shaped band 3 used to press the metal plate material 2 against the refractory brick 1 melts due to the heat held by the molten metal during pouring, or because it is made of the same metal as the molten metal, it melts. Since the metal becomes one with the molten metal during cooling, it does not affect the shrinkage force of the molten metal. Further, when the molten metal contracts, since the molten metal and the refractory brick 1 are separated by the metal plate 2, the metal plate 2 acts as a buffer and absorbs the contraction force. Furthermore, since there are no foreign substances between the cast parts 4 of the finished product, the stave cooler, and the refractory brick 1, a stable structure is ensured, and efficient brick heat conduction can be expected when the stave cooler is used.

The purpose of using a plurality of metal plates 2 is to more effectively alleviate the thermal shock of the metal. In the diagram, 5 is asbestos installed between firebrick 1, 6
is a gap filling material for removing the gap that occurs when the metal plate material 2 is attached to the refractory brick 1.

(Effect of the invention) Since the present invention operates as described above,
The heat input at the initial stage of pouring during casting is transmitted to the refractory bricks at a certain rate, the bricks are preheated, and the thermal shock at the initial stage of pouring can be alleviated. In addition, the metal plate material is deformable and can absorb the contraction force during contraction, and since there are no foreign substances between the base material and the bricks, appropriate heat conduction and stability can be expected.

Furthermore, the procedure for brick casting is simple, and the materials used can be obtained at low cost, resulting in significant cost reductions and other excellent effects.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a bottom view of a stave cooler manufactured according to the present invention, FIG. 2 is a sectional view taken along line A-A of the same, and FIG. FIG. 3 is a sectional view of the attached state. 1 is a refractory brick, 2 is a metal plate, 3 is a C-shaped band, 4 is a casting, 5 is asbestos, and 6 is a gap filler.

Claims (1)

[Claims] 1. In a brick casting method for a stave cooler that has a cooling pipe for cooling the furnace wall, etc. of a blast furnace, and has a refractory brick on the working side, the refractory brick on the side that contacts the casting to be poured is made of a metal plate. A method of casting stave cooler bricks, which is characterized in that the bricks are cast after being covered with.