JPH101357A - Production of tile effectively utilizing fused slag of incineration ash - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize refuse incineration ashes and to lower the firing temp. of tiles by press molding and drying a mixture composed of the fused slag of the refuse incineration ashes and clay minerals, then firing the moldings. SOLUTION: The refuse incineration ashes are heated and melted to 1150 to 1300 deg.C and are then pulverized to obtain the molten slag of the refuse incineration ashes. The dry body or slurry obtd. by mixing 30 to 95% molten slag of the refuse incineration ashes, 5 to 70% clay minerals, such as feldspar and pottery stone, having a grain size of <=100μm and, if necessary, water is granulated to obtain the dry body for molding or granular powder for molding. The dry body for molding or granular powder for molding is press molded and is dried and the moldings are fired at 800 to 1150 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[Technical field to which the present invention pertains] As a method of disposing of incinerated ash, a method of making bricks for pavement and utilizing it effectively has been implemented. However, most of the methods have not yet been obtained and effective methods for landfill disposal. Have been forced. In addition, to separate the salt and the harmful components related to it from the incinerated ash that elute into water, and to make the material more stable, and to reduce the total volume required for disposal, At present, it is the current situation that this ash melting method is adopted. Therefore, effective utilization of the waste incineration ash molten slag has become an important issue. TECHNICAL FIELD The present invention relates to a method for producing tiles for construction and civil engineering using slag, a large amount of refuse incineration ash generated in the future, as a main raw material.

[0002]

2. Description of the Related Art Waste incinerated ash molten slag is effectively used as civil engineering construction material. It is used in landfill ballasts and concrete and mixed with fired bricks and tiles at a fraction of a few percent. The way had been done. When it is used for fired bricks and tiles, it is not a main raw material, but rather a bulky material. This is because the melting point is 1200 to 1300 ° C. and the melting point is too low in the conventional brick and tile manufacturing process to be used as a main raw material, and the iron component and gas contained in the slag Ingredients were a decisive factor in providing tile product stability. The present invention solves these conventional problems and realizes the possibility of using slag as a main raw material for producing tiles.

[0003]

SUMMARY OF THE INVENTION A tile is produced using molten slag of refuse incineration ash as a main raw material to satisfy characteristics required for a tile for civil engineering and construction. Moreover, 1200-1300 degreeC of the temperature range in which melting of slag produces normal slag
A method of manufacturing with a much lower firing temperature, ie, 800
Sintering at ~ 1150 ° C satisfies the required properties. Then, it is an object of the present invention to establish a production technology that uses incinerated ash molten slag generated in a large amount in the future as a main raw material and is not a mere conventional alternative raw material but for use. In addition, the establishment of a manufacturing method with a lower firing temperature will not only reduce the unit energy consumption, but also reduce the energy use load consumed in manufacturing products. Is a problem that leads to the solution of issues such as the establishment of a manufacturing method using technology that contributes to the contribution of

[0004]

Means for solving the problem The composition of the incinerated ash molten slag is greatly influenced by the type of generated garbage, and the chemical composition is about 30 to 50% of SiO ₂ and Al
₂ O ₃ 10 to 40%, Fe ₂ O ₃ 1 to 6%, CaO 10
_{~35, MgO 1~8, Na 2 O} + K 2 O 3~10
%, And the melting temperature is from 1150 ° C. to 1300 ° C.
We know that it is ° C. Some slags exhibit a firing phenomenon at 950 ° C. to 1150 ° C. depending on the melting method. In order to use these slags effectively as the main raw material of the tile, it is important to ensure the stability of the tile base. It is a slag once melted at 1500 ° C, but it undergoes crystal transformation in the process of refiring and sintering the slag, and when used as a tile base such as gas generation, projections of firing occur on the tile surface, Problems such as insufficient sintering strength occurred, and it was found that the sintering strength could not be directly used as the main raw material. Further, the melting temperature range is 1150 ° C.
Since the temperature was 1300 ° C., it was found that even in this case, it could not be used as a main raw material because of melting in a conventional firing furnace in the tile manufacturing industry. For these reasons, the replacement rate of tile base materials has been forced to be as low as 3 to 10%. The present invention is to develop a method for solving these problems and using smelt slag from incinerated ash as a main raw material. First, these slags, feldspars, clay minerals such as porcelain stones are each pulverized into fine powders of 100 microns or less, uniformly mixed at a predetermined mixing ratio, and the clay or mud is formed into a raw material clay for molding or granules for molding. It was found that by firing the tile formed by the above method, the crystal transformation generated from the slag was eliminated, and no gas generation was observed. This is due to the sintering reaction with clay minerals such as feldspars and pottery stones added, so that the slag alone does not cause the crystal transformation in the sintering process. The effect on the swelling of the tile after sintering could be eliminated because the built-in gas component contained in the slag was released from the slag or the release was easy during the sintering of the tile. In the mixing, clay minerals such as slag, feldspar, and porcelain stone are crushed into fine particles, and the clay obtained by performing mixing and crushing simultaneously with the predetermined compounding components has a further uniformity. The strength and porosity required for the tiles became more satisfactory because the sintering of the green body progressed favorably. In addition, it was found that the temperature at which the kneaded clay or granule powder thus obtained was pressed, dried, and fired was preferably lower than the slag melting temperature range. Taking into account the fluctuation range of the components of the refuse incineration ash molten slag and the melting temperature range, an experiment was carried out, and firing at 800 to 1150 ° C was found to be optimal for using slag as the main raw material for tiles. all right. As described above, the present invention is to incinerate refuse by making each material into a fine powder and mixing or mixing and pulverizing to form clay or granules and sintering at a temperature lower than the melting temperature range of slag. It has made it possible to use ash molten slag as the main raw material for tiles.

[0005] Tiles of various colors can be produced by a method of baking incineration ash with molten slag as a main raw material and baking the tile base material obtained by sintering.
The present invention, when making a tile of molten slag,
By making a glazed tile that fuses to the slag surface at a temperature of 800 ° C. to 1150 ° C., it has become possible to use this tile more widely for construction and civil engineering.

[0006] In the present invention, the waste incinerated ash slag is 30 to
The reason why the use of clay minerals such as feldspar and porcelain stone is 5% to 70% is 95% and the use of this slag is much more than the conventional method. Sintering temperature of 800 ° C.
Defects that complicate the manufacturing process, such as the necessity of using a special low-melting material or a binder to manufacture the tile at a temperature lower than the sintering temperature of the conventional tile manufacturing method, up to 1150 ° C., and a factor that raises the cost of the binder and the like However, the amount of this slag was set to the lower limit of 30% because of the drawbacks such as the following. Further, the upper limit is set to 95% because it is a limit to prevent the occurrence of crystal transformation in the sintering process due to coexistence with clay minerals such as feldspar and pottery stone. Therefore, the upper limit of clay minerals such as feldspar and pottery stone was set to 70%, and the lower limit was set to 5% to determine the basic material composition. The lower limit of the sintering temperature is 800 ° C., because if the temperature is lower than this temperature, the ceramic bond is not sufficiently formed, and the material strength may not be sufficient.

[0007]

Example: Waste incineration ash molten slag was crushed to 0.5 mm or less, and 70%, feldspar powder 10%, pottery stone powder 10%, and water arsenic clay 10% were mixed and crushed to produce a mixed fine powder of 100 microns or less. Using this as a forming raw material clay, a tile having a length of 100 mm, a width of 50 mm, and a thickness of 5 mm was formed by a 50-ton hydraulic press. After molding, dried at 110 ° C. for 24 hours,
The temperature was raised to 1100 ° C. at a rate of 100 ° C./hr,
The temperature is maintained at 100 ° C. for 3 hours, and the temperature is brought to room temperature by cooling at 80 ° C./hr. This tile has a bulk specific gravity of 2.15 g / cm ³ , a compressive strength of 700 kg / cm ² and a bending strength of 150 kg / cm ^2.
The water absorption was 0.5% or less, and it was used as an exterior tile. Since the incineration ash molten slag itself contains a lot of iron, in the method of this embodiment, it is possible to provide a warm and calm scenery as an exterior tile that is colored brown. Was. In addition, the surface of the tile was coated with a drug and colored to provide tiles of various hues.

[0008]

【The invention's effect】

1. A method for producing tiles for construction and civil engineering using waste incinerated ash molten slag as a main raw material was provided. 2. The firing temperature of conventional tiles is 1200 ° C to 1300 ° C
On the other hand, the firing temperature of tiles made from refuse incineration ash molten slag as a main raw material can be significantly reduced to 800 ° C. to 1150 ° C., thereby enabling energy saving. 3. A wide variety of tiles could be manufactured because they were coated with a low melting temperature adhesive. 4. The waste of municipal waste was processed and a large amount of slag generated as a large amount of slag was secured as a tile used for construction and civil engineering.

Claims (2)

[Claims] 1. A clay or mud obtained by mixing or mixing and grinding 30% to 95% of garbage incinerated ash molten slag and 5% to 70% of clay minerals such as feldspar and pottery stone. After powdering, pressing and drying, 800
A tile manufacturing method that makes effective use of refuse incineration ash molten slag that is fired at a temperature of from 1C to 1150C. 2. Clay or mud obtained by mixing or mixing and grinding 30% to 95% of garbage incinerated ash molten slag and 5% to 70% of clay minerals such as feldspars and pottery stones. After powdering, pressing and drying, 800
800 to the surface of the tile fired at a temperature of
A tile manufacturing method that effectively utilizes garbage incinerated ash molten slag obtained by baking a Yu medicine that fuses at a temperature of 1 to 1150 ° C.