JPH11267819A - Gutter for metallic molten metal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To strengthen a flooring of a refractory material made metallic molten metal gutter having a metallic molten metal flow runner, an upper face of which is kept open. SOLUTION: This gutter 10 for a metallic molten metal is composed of a figurated refractory brick 12 which forms a base of the runner 11 and is juxtapositioned in an extending direction of a runner 11, and a main body 13 formed by a non-figurated refractory material which integrally covers and holds a side wall of the runner 11, a side wall and the base of the figurated refractory brick 12. This figurated refractory brick 12 is a refractory material having either one or both of alumina and magnesia, and carbon as its main components, and furthermore a reinforcement processing is applied such as a press processing, baking and the like. Therefore, it is hard to be impaired by the weight and the like of the metallic molten metal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a gutter for molten metal.

[0002]

2. Description of the Related Art In some cases, a molten metal after being melted is flowed through a refractory metal gutter having a gutter having an open upper surface. Conventionally, as shown in FIG. 4 and FIG. 5, this molten metal gutter 1 is an irregular-shaped refractory (castable refractory) having a concave shape in cross section (FIG. 5), that is, having a molten metal groove 2 having an open upper surface. 3. The amorphous refractory 3 is formed by charging a mixture containing alumina, silicon carbide and carbon as main constituents and, for example, cement as a binder into a mold having a predetermined shape.

The molten metal sent to one end of the molten metal gutter flows downward along the slope of the bottom surface of the molten metal groove 2.

[0004]

However, the above-mentioned conventional castable metal refractory gutter for molten metal has a problem that the molten metal is liable to be damaged by the molten metal. That is, since the molten metal has a temperature close to the refractory temperature of the refractory forming the gutter and is heavy, the bottom of the gutter of the molten metal gutter is melted and damaged.

[0005] When the bottom surface of the metal melt gutter is damaged as described above, the flow of the metal melt becomes non-uniform, slag and the like adhere more, the life of the gutter is shortened, and the equipment cost is reduced. Disadvantageous. An object of the present invention is to provide a metal gutter having good durability and advantageous in terms of equipment cost.

[0006]

Means for Solving the Problems In order to solve the above problems, the inventors of the present invention have made various studies, and the weight of the molten metal flowing through the gutter for molten metal melts down the bottom of the gutter due to its weight.
The inventors of the present invention have thought of using a fixed-form refractory brick that can be subjected to a strengthening process such as pressing and firing on the bottom surface of the molten metal gutter, and have completed the present invention.

In other words, a gutter for a molten metal according to the present invention is a gutter for a molten metal made of a refractory material having a gutter having an open upper surface through which the molten metal flows, the extending direction of the gutter forming the bottom of the gutter. The refractory bricks are juxtaposed to each other, and a main body formed of an irregular refractory which integrally covers and holds a side wall of the gutter and side and bottom surfaces of the refractory brick. .

[0008]

In the above-mentioned gutter for molten metal, the bottom of the gutter is formed of a fixed refractory brick which can be subjected to strengthening such as press working and firing. For this reason, the bottom of the gutter is strengthened, making it less likely to be damaged by the flow of the weight of the molten metal,
It has good durability and is advantageous in terms of equipment cost.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the gutter for molten metal of the present invention,
The molten metal groove having an open top surface is a passage for the molten metal having a concave cross section having a side wall and a bottom surface. The fixed refractory brick functions as a floor covering that forms the bottom of the gutter. The refractory brick may be formed by arranging a plurality of hexahedral block bricks in the direction in which the gutter extends, or may be formed of a single-plate refractory brick that is long in the direction in which the gutter extends. In the case where the refractory bricks are manufactured in a plurality of blocks, one or more rows of the block bricks are juxtaposed in the direction in which the gutter extends in accordance with the width of the gutter. When juxtaposed in a plurality of rows, the position of each block brick may be shifted for each adjacent row. Fill the gap between the block bricks with fireproof mortar or the like.

The fixed refractory brick can be formed by pressing or firing a mixture containing one or both of alumina and magnesia and carbon as main components. As a result, a predetermined strength is secured at the bottom of the molten metal gutter. The main body is formed of an irregular-shaped refractory, forms a side wall of the gutter, integrally covers side and bottom surfaces of the shaped refractory brick, and has a concave cross-section so as to hold the shaped refractory brick. It is preferable to form it.

The amorphous refractory is preferably a mixture containing alumina, silicon carbide and carbon as main components. Alumina cement, phosphate, synthetic resin and the like can be used as a binder for binding these main components. In addition,
The bottom of the gutter can have a slope. in this case,
The refractory may be inclined depending on the thickness of the irregular-shaped refractory constituting the main body portion, or may be inclined by juxtaposing rectangular shaped refractory bricks.

[0012]

FIG. 1 shows an embodiment of a gutter for molten metal according to the present invention.
This will be specifically described with reference to FIGS. FIG. 1 is a cross-sectional view of a metal melt gutter along the length direction, FIG. 2 is a front view as viewed from the length direction, and FIG. 3 is a plan view. As can be seen from the drawings, the molten metal gutter 10 of the embodiment has a molten metal 11 having an open upper surface, a fixed refractory brick 12 forming a floor covering of the molten metal 11, and a side surface of the fixed refractory brick 12. And a main part 13 including a side wall that covers the bottom surface and extends above the bottom surface of the hot water groove 11. Both ends of the hot water groove 11 are an open upstream end 14 and a downstream open end 15.

The thickness of the bottom portion of the main body 13 is increased toward the upstream open end 14 and is inclined so that the molten metal flowing through the molten metal groove 11 flows from the upstream open end 14 to the downstream open end 15. In addition, the side wall of the main body 13 is an inclined bank in which the groove width of the hot water groove 11 is widened toward the upper surface side. The refractory material of the main body 13 is made of an unburned amorphous refractory in which alumina, silicon carbide, and carbon are combined with a binder.

The refractory brick 12 is formed by connecting a plurality of rectangular hexahedral blocks 12a obtained by press-molding a mixture of alumina and carbon with a refractory mortar and juxtaposing them on the slope of the main body 13. As shown in FIG. 3, the blocks 12a are arranged in a line along the length L (FIG. 1) along the direction in which the melt groove 11 extends. The width W (FIG. 3) of the block 12 a determines the width of the refractory brick 12, and is smaller than the width Wo of the side wall portion of the main body 13.
3 embedded. The upper surface of the central portion in the width direction of the fixed refractory brick 12 is exposed as the bottom surface of the gutter 11. The height H (FIG. 2) of the block 12a determines the thickness of the refractory brick 12.

In the embodiment, the width W of the block 12a is 600 mm, the length L is 300 mm, and the height H is 120 mm.
It is. The height Ho of the molten metal gutter 10 is 450 m.
m, the width Wo on the upper surface side of the main body 13 is 780 mm, and the height Hs of the side wall of the main body 13 is 200 mm. Also, a corner rising from the bottom of the molten metal groove 11 to the side wall is formed in an arc having a radius of 50 mm.

The molten metal gutter having the above structure can be manufactured as follows. First, each block 12a pours a fluid of a crushed product of alumina and carbon into a predetermined mold, applies pressure, and sinters. The blocks 12a obtained by this sintering are arranged in the length L direction, and the gaps are joined with fireproof mortar to form a single-plate shaped refractory brick 12. Next, the fixed refractory brick 12 is set in a mold for molding the main body 13, and the pulverized material of the refractory material is bonded to the mold with a binder such as alumina cement having high fire resistance. It is formed by firing. Thus, the metal melt gutter 10 can be manufactured.

In such a gutter 10 for molten metal, the gutter 1
Since the fixed refractory bricks 12 constituting the bottom of the metal mold 1 are fired in a state of applying pressure, a predetermined strengthening is obtained at the bottom of the gutter 11 and the metal refractory is hardly damaged by the weight of the molten metal. . Thus, the metal melt gutter has good durability and is advantageous in terms of equipment cost. In addition, although the bottom of the gutter 11 of the molten metal gutter 10 described in the embodiment is inclined, when the installation of the molten metal gutter 10 is inclined, as a gutter having a constant cross-sectional shape in the length direction. Is also good.

[0018]

As described above, according to the present invention, in a metal refractory gutter made of a refractory having an open gutter on the upper surface through which the molten metal flows, the bottom of the gutter is made of a fixed refractory brick. The tension makes it harder to be damaged by the molten metal, improves the durability, and can greatly reduce the equipment cost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view along a gutter of a gutter for molten metal of the present invention.

FIG. 2 is a front view of the molten metal gutter of FIG. 1 as viewed from the left side.

FIG. 3 is a plan view showing a gutter for molten metal of the present invention.

FIG. 4 is a side cross-sectional view along a gutter of a conventional metal melt gutter.

FIG. 5 is a cross-sectional view of the molten metal gutter of FIG.

[Explanation of symbols]

10 gutter for molten metal, 11 gutter, 12 refractory brick, 12 a block brick, 13 body.

Claims (2)

[Claims] 1. A metal refractory gutter made of a refractory having a gutter having an open upper surface through which a molten metal flows, wherein a fixed refractory brick is juxtaposed in a direction in which the gutter extends to form a bottom of the gutter. And a main body formed of an irregular-shaped refractory which integrally covers and holds a side wall of the gutter and side and bottom surfaces of the refractory brick. 2. The regular refractory brick comprises one or both of alumina and magnesia and carbon as main constituents, and the irregular refractory comprises alumina, silicon carbide and carbon as main constituents. The gutter for molten metal according to claim 1.