1, raw material: the main component is clay (which can be divided into black mud to improve the plasticity of products; White mud improves the whiteness of products) and sand (the main component is SiO2, which is used to improve the strength of products, etc. );

2. Ball milling: that is, the raw materials reach a certain fineness and uniform composition in the grinding process, and at the same time, in order to promote ball milling, about 34% ~ 37% water should be added in the grinding process. Grinding ball and mixing sand;

3. Spray granulation: In principle, in a spray drying tower, the 600℃ hot air sent down by a hot blast stove fully convects with the upward sprayed suspension to form hollow particles of raw materials for drying granulation. Production of raw materials to ensure the good combination of raw materials in the compression molding stage;

4. In the powder bin (raw material rancidity): the raw materials are naturally placed for more than 48 hours after storage to ensure the uniformity of water content and the consistency of physical and chemical properties of raw materials;

5. Press forming: The tonnage of the press and die determines the main defects such as resistance, size and cracking of the product. If there is a problem, the overall quality of the tiles will be reduced and the later use will be limited.

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