Ceramic green body drying process

Abstract

The invention discloses a ceramic green body drying process. The process comprises the steps that (1) green bodies are placed into a drying room, the initial temperature is set to be 28-32 DEG C, and the initial humidity is set to be 82-85%; (2) the temperature continues to be raised to 34-36 DEG C from the initial temperature, the humidity continues to be reduced to 78-79% from the initial humidity, and the temperature and the humidity are maintained for 3.5-7 hours; (3) the temperature continues to be raised to 38-40 DEG C from the cut-off temperature in the step (2), the humidity continues to be reduced to 74-76% from the cut-off humidity in the step (2), and then the temperature and the humidity are maintained for 7-10 hours; (4) temperature continues to be raised to 42-44 DEG C from the cut-off temperature in the step (3), the humidity continues to be reduced to 66-68% from the cut-off humidity in the step (3), and then the temperature and the humidity are maintained for 3-5 hours; (5) the temperature is maintained for 6-9 hours after being raised to 75-80 DEG C at the speed of 8-12 DEG C per hour, and the humidity is maintained for 6-9 hours after being reduced to 13-20% at the speed of 8-9% per hour; and (6) the temperature is lowered to the indoor temperature, and then the green bodies are taken out. Through the drying process, the cracking rate of ceramic green bodies in the drying process is effectively reduced, and the drying qualified rate of the green bodies is increased; and the drying efficiency can be effectively improved, and the drying time of green bodies can be shortened effectively.

Description

technical field [0001] The invention relates to the field of ceramic manufacturing, in particular to a ceramic green body drying process. Background technique [0002] In the prior art, the drying of the sanitary ceramic body generally goes through three processes of heating up, keeping warm and cooling down. In "Research on Rapid Drying Technology of Sanitary Ceramics" written by Liu Mingfu and others (published in the fifth issue of "Ceramics" magazine in 2006), the relationship between ceramic drying process and water evaporation is recorded. In this process, the ceramic body is generally Rising from 60°C to 110°C within three hours, then cooling at 110°C for 7 hours. The problem with this process is that it is easy to cause the body to crack, especially for super-large sanitary ceramic bodies with double-sided slurry and larger thickness, it is more likely to crack, resulting in a reduction in the qualified rate of green body drying. Contents of the invention [0003...

AI Technical Summary

Problems solved by technology

The problem with this process is that it is easy to cause the green body to crack, especially for the ultra-large sanitary ceramic body with double-sided slurry and large thickness, it is easier to crack, resulting in a lower drying pass rate of the green body

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