JPS61291031A - Preparation of coagulated granular ceramic stock material - Google Patents

Abstract

PURPOSE:To prevent the generation of a fine waste powder by destructing and homogenizing a central cavity part, by granulating a stock slip by a spray dryer and molding granulated particles into a flat shaped ones by a rolling roller while forming the plate shaped particles into granules by compression molding to prepare a coagulated granular ceramic stock material. CONSTITUTION:A ceramic stock slip is granulated by a granulating spray dryer 10 to form granulated materials 15 which are, in turn, fallen downwardly. These granulated materials 15 are crushed between rolling rollers 20 to mold flat plate shaped molded materials. The center cavity of each granulated material 15 is compressed and destructed and the granulated materials 15 are homogenized as a whole. Subsequently, the flat shaped molded materials 25 are molded into a granulated molded substances with a diameter of about 20-60mm by a compression molding machine 30 to obtain a granulated ceramic stock material for developing a spot pattern. Further, the rolling rollers 20 are constituted so as to be capable of adjusting the gap between the rollers in order to limit crushing pressure to adjust the water content of the molded materials. The outer peripheral surface of each roller is constituted of a ceramic material in order to prevent adhesion.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a ceramic raw material mainly used as a tile raw material for creating a spotted pattern, and particularly to a method for producing a raw material formed into aggregates.

In recent years, in the production of tile raw materials, it has become common practice to granulate raw material slurry into suitable granules using a spray dryer. Granulation using a spray dryer has a significant advantage in the production of this type of raw material, in that the granulated granules are homogeneous and lightweight, and further drying is unnecessary. A method of compression-molding the granulated product using the spray dryer into a desired shape using a compression molding machine to obtain a raw material product is also known, as described, for example, in Japanese Patent Publication No. 57-56370.

By the way, since the granules obtained by the above-mentioned spray dryer are rapidly dried by hot air in the chamber, the outer surface side of the granules 15 contracts as shown in FIG. 2 of the attached drawings, and a cavity is formed inside. The inside is softer than the outside, meaning it has a structure with less moisture.

Therefore, when such granules are molded into a certain shape as they are, the soft center of the granules remains as is, especially inside the molded product, and when the molded product is crushed when used as a raw material, it becomes so-called pollen. This results in the production of a large amount of fine waste grains called kamai, which results in the production of some sickles that are inferior in quality as a raw material product.

Therefore, the purpose of this invention was to improve the above-mentioned drawbacks of the conventional products in a very simple and effective manner, and the invention was successful.First, the gist of this invention will be explained. It is as follows.

That is, the apparatus for producing aggregated ceramic raw material granules according to the present invention includes the steps of granulating raw material slurry for ceramics into suitable granules using a spray dryer, and then guiding the granules between two rolling rollers. It is characterized by comprising a step of forming a flat face plate-like molded product, and then a step of compression-molding the face plate-like molded product into aggregates.

one! - As mentioned above, in the present invention, a rolling roller device is installed next to the granulation step equipped with a spray dryer, and the step of guiding the granular material between two rolling rollers to form a flat plate-like molded product is carried out. The purpose of this was to compress and destroy the central cavity formed in the granular material obtained by the spray dryer to make it homogeneous, and to make it into a face plate-like molded product using two rolling roller devices. However, it is much simpler and easier than using any other method, and the desired moisture content can be easily obtained by regulating the distance between the rolling rollers.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to further clarify the gist of the invention described above, and to comprehensively explain the structure and effects of the invention, examples of the invention will be described below in detail with reference to the drawings.

Figure 1 of the drawings for m (=j) is a schematic process diagram showing an example of the method of the present invention, Figure 2 is a cross-sectional view of a granular material granulated by a spray dryer, and Figure 3 is a perspective view of a face plate-shaped molded product. ,
FIG. 4 is a cross-sectional view of the aggregate shaped molded product.

In the figure, reference numeral 10 is a spray dryer device for granulation, and 15 is a granular material granulated in the spray dryer. It has become.

Reference numeral 20 denotes a rolling roller device which presses the granular material 15 produced by the spray dryer between two rollers to form a flat plate-like molded product 25 as shown in FIG. It has become.

Note that the rollers of the rolling roller device 20 are configured so that the distance between the two rollers can be adjusted so that the pressing pressure can be regulated and the moisture contained in the face plate-shaped molded product 25 can be adjusted. Further, each roller has an outer circumferential surface made of ceramic in order to prevent adhesion when pressing the granular material 15 and forming it into a flat plate-like molded product 25.

Next, the reference numeral 30 denotes a compression molding machine, such as a known dry granulator called a briquette machine used for producing this type of raw material.

By this compression molding machine 30, the above-mentioned face plate-like molded product 25 is molded into approximately 2.0 mm for convenient transportation and storage as a raw material product.
It is molded into an aggregate-like molded product 35 having a diameter of about 0 to 40 mm.

According to the method of this invention, as described above, the granules granulated with a spray dryer are once introduced between two rolling rollers to form a flat face plate-like molded product, and then the face plate-like molded product is aggregated. Because it is compression molded into granules,
The central cavity formed in the granules obtained by the spray dryer is compressed and destroyed to make the granules homogeneous as a whole, and then compression molded into a predetermined shape. Therefore, the generation of a large amount of fine waste particles, which is caused by forming granules with a central cavity into a fixed shape as is in conventional products, is avoided, which greatly contributes to improving the quality of raw materials. Now you can.

In addition, according to the method of this invention, it can be realized by adding the step of forming a face plate-like molded product using two rolling roller devices, so this step is much simpler and easier than using any other method. It has the great advantage that it is easy and that the desired moisture content can be easily obtained by regulating the distance between the rolling rollers.

As described above, the method of the present invention can enjoy extremely superior advantages over previous methods.

[Brief explanation of the drawing]

Fig. 1 is a schematic process diagram showing an example of the method of this invention, Fig. 2 is a cross-sectional view of granules granulated by a spray dryer, Fig. 3 is a perspective view of a face plate-shaped molded product, and Fig. 4 is an aggregated granule. It is a sectional view of a molded article. 10... Spray dryer, 15... Granular material, 2
0... Rolling roller device, 25... Face plate-shaped molded product, 3
0... Compression molding machine, 35... Aggregate molded product.

Claims (1)

[Claims] A step of granulating raw material slurry for ceramics into suitable granules using a spray dryer, then a step of guiding the granules between two rolling rollers to form a flat face plate-like molded product, and then a step of forming the base plate-like product into a flat face plate-like molded product. 1. A method for producing a ceramic raw material in the form of aggregates, comprising the step of compression molding a molded product into aggregates.