Preparation process of blank-similar type mud cosmetic clay and ceramic tile

Abstract

The invention relates to a preparation process of blank-similar type mud cosmetic clay and a ceramic tile. The blank-similar type mud cosmetic clay comprises the following components in parts by weight: 45-80% of silt slurry; 10%-50% of glazed tile recycled slurry; 2% ~ 5% of wollastonite; 0-0.5% of sodium carboxymethyl cellulose; 0-0.5% of sodium tripolyphosphate; 0-0.5% of lignin; 0-0.5% of water glass; 0-1% of sodium pyrophosphate and 0-0.5% of sodium hexametaphosphate. The preparation process includes: (1) blank pressing, namely batch homogenizing of mineral raw materials; (2) blank body drying; (3) drying temperature of 100-280 DEG C, and drying time of 90-120 minutes; (4) applying of the blank-similar type mud cosmetic clay; (5) pattern decoration; (6) drenching of transparent glaze,the specific gravity is controlled to be 1.75-1.80, and the Engler Viscosity is controlled to be 30-40s; (7) firing, temperature is 1170-1190DEG C, and the time is 80-90 minutes; and (8) polishing and edging.

Description

technical field [0001] The invention relates to the technical field of ceramics, in particular to a preparation process of a kind of green body type mud make-up soil and ceramic bricks. Background technique [0002] In recent years, fully polished glazed products such as full-body marble and full-body glazed tiles in the architectural ceramics industry have become mainstream products in the market. According to the adaptability requirements of traditional blank glazes, the expansion coefficient of ceramic tile product blanks needs to be slightly greater than that of glaze, so that the glaze A small compressive stress can be generated without cracks while improving the thermal stability and mechanical strength of the glaze. The production of full-glazed products usually adopts the process of pressing green body → pouring makeup soil → decorative printing → pouring transparent glaze, in which potash feldspar, albite, nepheline, wollastonite, burnt clay and transparent glaze ar...

AI Technical Summary

Problems solved by technology

Due to the different raw material selection and formula structure of the green body, makeup clay, and transparent glaze, there are also differences in their chemical composition and expansion coefficients, and the expansion coefficients of the three are difficult to be consistent with the changing trend of the high-temperature firing temperature of ceramic tiles. Throwing products are prone to wave deformation during the high-temperature firing process, which makes the surface flatness of the brick surface worse, which makes it difficult to carry out the polishing process after the semi-finished product

Although the national standard GB / T4100-2016 for ceramic tiles requires the surface flatness of ceramic tiles to be within 2mm, in general, in order to ensure that the semi-finished ceramic tiles will not be exposed during the polishing process, full glazed products in the industry The flatness of the brick surface is required to be controlled to be convex or concave ≤ 1.0mm, but the polishing of some color products such as gray products has higher requirements on the flatness of the brick surface, and the uneven thickness of the polished glaze layer is more prone to polishing yellow. Side phenomenon, affecting product quality

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