KR200269838Y1 - Refractory brick for the upper plate structure of a carriage - Google Patents

Abstract

The present invention prevents the gap of the refractory brick from opening even when foreign matter penetrates into the gap between the refractory bricks forming the top plate structure of the bogie, and allows the high temperature heat in the kiln to easily circulate to the lower part of the molding to achieve convection. The present invention relates to a brick for a top plate structure of a bogie that allows the lower molding to be evenly and completely fired, and includes 38 to 48% by weight of silicon dioxide (SiO₂) by mixing kaolin (clay), mullite, silymanite (serpentine) and silica. , Left and right side surfaces having an inclined surface inclined to the upper and lower surfaces and a lower portion forming a plane having an amount of 52 to 60% by weight of aluminum oxide (Al₂O₃) and 0 to 2% by weight of iron oxide (Fe₂O₃), and an elliptical perforated portion The refractory brick has a high oxidation resistance by forming a front and rear side surface having a plurality of thermal circulation holes. Foreign matter accumulates in the triangular-shaped space at the end formed between the refractory brick and the refractory wall to prevent the deterioration of the top plate structure by the gap between the refractory bricks due to the foreign matter, and high temperature heat is circulated by the heat circulation hole. As a result of convection, the moldings loaded on the upper and lower parts can be completely fired.

Description

Refractory brick for the upper plate structure of a carriage}

The present invention is a gap between the brick and the brick used for the top plate structure installed on the refractory structure of the trolley car for transporting the above molded product into the firing furnace for firing the molded products such as red brick, ceramics, tiles and the like. It prevents foreign matter from penetrating the location of the refractory bricks constituting the top plate structure and at the same time, the refractory bricks have strong physical properties such as fire resistance, compressive strength and thermal shock resistance, and high temperature heat circulates when firing the moldings. The present invention relates to a refractory brick for a top plate structure of a trolley, in which a molding positioned at a lower part thereof is completely calcined by forming convection.

In general, the refractory bricks used for the upper plate structures on the upper surface of the refractory structures of bogies are made of aluminum (Aℓ) in 100 parts by weight of alsica refractory containing aluminum oxide (Al₂O₃), silicon carbide (SiC), and carbon (C). , 3 parts by weight of a metallic silicon powder containing silicon (Si) and magnesium (Mg) -aluminum (Aℓ), 20 to 25% by weight of sodium oxide (Na₂O), 65% by weight of phosphorus pentoxide (P₂O ₅ ) and phosphorus trioxide ( It contains 0.3 to 1.0 parts by weight of composite oxide containing 10 to 15% by weight of P₂O₃), and its shape is composed of a rectangular parallelepiped, and the firebrick formed as described above is laid on the whole surface of the bogie to form a top structure. Done.

However, the firebrick for the top plate structure is composed of a rectangular parallelepiped, so that the top wall structure is formed by laying the refractory brick of the rectangular parallelepiped so that there is no gap in the entire top surface of the refractory structure of the bogie, and then laminating the moldings on the top plate structure so that the foreign material from the molding This fall apart is stacked on the top structure, when entering into the kiln and contact with high temperature heat, the refractory brick becomes bulky by the high temperature heat, and thus the volume of the whole top structure becomes large.

When the trolley is moved to the cooling zone after firing the molding in the above state, the refractory bricks forming the refractory structure and the top plate structure are returned to their original state, but the individual refractory bricks are returned to their original state in the state where the entire volume of the structure is expanded. There is a gap between the individual refractory bricks whose volume is returned to its original state, and foreign matters (dirt, molding debris, dust particles, etc.) accumulated on the top structure are penetrated between the gaps.

If the above-mentioned repeated firing of the molded product is repeated, foreign matter continues to penetrate between the refractory bricks forming the refractory structure and the upper plate structure of the trolley, and the width of the refractory structure and the upper plate structure becomes wider.

Therefore, repeating the molding firing operation for about 3 months, foreign matter enters between the refractory bricks, and the front, rear, left and right widths of the fire resistant structure and the top plate of the trolley are widened by 5 to 10 cm.

If the width becomes wider like this, the bulging part of the refractory structure or the top plate structure is caught by the heat blocking groove of the kiln, and the fireproof structure or the top plate structure may be damaged, and the moldings placed on the top plate may be damaged, and the bogie may not be able to enter and exit the kiln. There was this.

Another problem of the refractory brick includes 10 to 15% by weight of carbon, which may damage the refractory material due to oxidation of carbon. In addition, the top plate installed on the refractory structure includes a plurality of integral castable or refractory bricks. The fire-brick, which is laid on a flat surface, does not have perforations formed laterally, so that hot heat cannot be circulated into the upper plate, so that a high temperature heat is well applied to a molding placed immediately above the upper plate (lower part of the molding). There is a problem that the molding can not be evenly baked because it is not delivered

Another problem is that the weight of the trolley for the refractory brick to form a top plate is an overweight, so that the trolley may not be able to endure a large weight in a high-temperature firing furnace and may be damaged.

Therefore, the present invention was devised to solve the above-mentioned problems, and its purpose is to prevent the firebricks from being deformed and deformed from each other even if foreign materials penetrate into the gaps of the firebricks forming the top structure which is formed on the top surface of the fire resistant structure of the bogie. At the same time, the weight of the top plate is lightened, the fireproof brick for the top plate is stably supported by the heat insulating material, and the high temperature heat in the kiln is circulated to form convection for the moldings loaded on the top plate of the bogie to achieve convection. Minimization is to ensure that the moldings loaded at the bottom end can be fired normally.

1 is a perspective view of the fire brick of the present invention

2 is a cross-sectional view taken along the line A-A 'of FIG.

3 is a perspective view of another example of the present invention firebrick

Figure 4 is a perspective view of another example of the fire brick of the present invention

5 is a perspective view of an embodiment of the present invention the firebrick to form a top plate structure

6 is a perspective view of a conventional firebrick

<Description of main parts of drawing>

11: refractory brick 25: thermal circulation hole 22.22 ′: brick side

15: thermocycling layer 17.17 'plane portion 18: uneven portion 18': recessed portion

10: top structure 12. heat insulation layer 30: space part

1 is a perspective view of the fire brick of the present invention, FIG. 2 is a sectional view taken along line AA ′ of FIG. 1, FIG. 3 is a perspective view of another example of the fire brick of the present invention, and FIG. 4 is a perspective view of another example of the fire brick of the present invention, FIG. 5 is a perspective view of an embodiment in which the inventive fireproof brick forms a top plate structure, and FIG. 6 is a perspective view of a conventional firebrick.

Refractory brick for the top plate structure of the bogie of the present invention is 38 to 48% by weight of silicon dioxide (SiO₂) by mixing kaolin (clay), mullite, silymanite (serpentine), silica, as shown in Figs. Left and right sides having 52 to 60% by weight of aluminum oxide (Al₂O₃) and 0 to 2% by weight of iron oxide (Fe₂O₃) and having a planar upper and lower surfaces (21 and 21 ′) and inclined surfaces inclined downward (22,22 ') and a planar front and rear surfaces 23, 23' having a plurality of elliptical perforations, and a thermal circulation hole 25 formed therein.

In the above, the left and right sides 22 and 22 'form an inclined surface inclined to the lower inner side, so that the refractory bricks 11 of the present invention form the fireproof structure of the bogie when the top plate structure of the trolley bogie is filed with the same design as the present invention. The long triangular shaped space portion 30 is formed in the lower portion of the interlocking refractory bricks 11 when they are interposed in a plane with the heat insulating layer 12 made of ceramic fiber nonwoven fabric laminated on the bottom of the upper surface.

Therefore, when the space portion 30 is formed, the molding is loaded on the upper plate structure 10 so that foreign matters generated in the molding are not caught in the gaps between the refractory bricks 11 and fall into the insulating layer in the space portion 30. If the stacking is repeated, and the firing operation is repeated and accumulated so that the foreign matter is almost filled in the space part 30, the firebrick 11 is lifted up, and then the foreign material is removed from the heat insulating layer made of ceramic fiber nonwoven fabric under the firebrick 11 and then the heat insulating layer. By re-laying the refractory bricks (11) extracted from the can be used repeatedly and long-term use.

In the above, the plurality of thermal circulation holes 25 are formed in the refractory brick 11 by installing the thermal circulation holes 25 toward both walls in the kiln when the upper plate structure 10 is installed as the refractory brick 11. The molding loaded on the bottom can be completely calcined by convection so that high temperature heat is circulated to the bottom in the molding loaded on the upper plate structure 10 in the kiln.

In the above, raw materials such as kaolin, clay, mullite, silimite (serpentine), and silica are mixed to have a content of 38 to 48% by weight of silicon dioxide, 52 to 60% by weight of aluminum oxide, and 0 to 2% by weight of iron oxide. Refractory brick (11) of the present application in the test analysis report in the Institute of Ceramic Technology, the residual line expansion shrinkage at 1000 ℃: -0.04%, apparent porosity: 27.61%, compressive strength: 29MPa, fire resistance (SK): 36 (1770 ℃) The results show that the high degree of refractory is shown above because of high content of alumina with high fire resistance, high crystallinity of silicon oxide, and small amount of iron oxide which is weak in high temperature heat. It can be said to be the most excellent to use as a firebrick for the top plate structure of a bogie.

Another example of the refractory brick 11 is composed of the raw material as shown in Figure 3, having the above-described physical properties, the upper surface of the left and right side (22, 22 ') flat portion (17, 17') ) Can be formed.

The upper part of the left and right sides 22 and 22 'is formed as the flat parts 17 and 17', and when the top plate structure 10 is installed, the refractory bricks are formed by the flat parts 17 and 17 '. 11) It is to increase the joint surface of each other so that they can be stably supported.

Another example of the refractory brick 11 is composed of the raw material as shown in Figure 4, having the above properties, it can form a plurality of uneven portion 18 in the longitudinal direction on the upper surface.

The concave portion 18 'of the concave-convex portion 18 is loaded at the bottom by the high temperature heat being circulated and circulated to form convection when the molded product is loaded on the upper plate structure 10 and fired in the kiln. The moldings are also able to be fired completely.

The firebrick for the top plate structure of the present invention does not contain carbon, and mainly contains alumina having high fire resistance and silicon with high crystallinity, and thus has high oxidation resistance in a high temperature firing furnace, so that it is not easily deteriorated even after long-term use. · Since the right side is inclined to the lower inner side, foreign substances are generated in the molding and penetrate into the gap between the refractory bricks forming the top structure, and are formed between the refractory bricks and accumulated in the triangular space. There is no fear of gap between the refractory bricks due to the infiltration of foreign materials, and if the foreign materials accumulate a lot in the triangular space between the refractory bricks forming the top structure by using the truck for a long time, After removing the foreign matter accumulated on the insulation layer By again laminating embellish refractory heat insulating layer on the refractory bricks forming the roof structure it has an excellent effect, such as available for long periods of time.

In addition, the refractory brick for the top structure has a heat circulation hole formed in each brick, and the heat circulation hole forms a heat circulation layer by forming a top plate facing both walls in the kiln, so that high temperature heat is loaded on the top structure. It is purified to the lower part of the molding to make convection, so that the molding loaded on the upper and lower parts can be completely fired, and the refractory brick is perforated, so that the total weight of the refractory brick required for one truck is conventionally used. It is lighter than less than three-fifths of the weight of the brick and castable, so that the upper plate structure of the trolley has less load to the trolley, thereby extending the life of the trolley.

Claims (3)

Kaolin (clay), mullite, silymanite (serpentine), and silica mixed with 38 to 48 wt% of silicon dioxide (SiO₂), 52 to 60 wt% of aluminum oxide (Al₂O₃) and 0 to 2 wt% of iron oxide (Fe₂O₃) The upper and lower surfaces 21 and 21 'forming a plane having a content, the left and right sides 22 and 22' having inclined surfaces inclined to the lower inner side, and the thermal circulation hole 25 having a plurality of elliptical perforations. Refractory brick for the top plate structure of the trolley, characterized in that consisting of the front and rear sides (23, 23 ') having a plane The method of claim 1, The refractory brick 11 is a refractory brick for a top plate structure of a bogie, characterized in that the upper part of the left and right sides 22, 22 'is a flat part 17, 17'. The method of claim 1, Refractory brick 11 is a refractory brick for the upper plate structure of the bogie, characterized in that a plurality of uneven portions 18 formed in the longitudinal direction on the upper surface