Dehydration and drying technology in ceramic production
November 27 19:00:44, 2024
For thousands of years, ceramics production in the world has followed the three major technological processes of comminution, mixing, preparation, and forming and calcination of raw materials. Because of this, the products so produced are called traditional ceramics. Therefore, it is the biggest characteristic of ceramic production. The material is crushed, mixed, and then it is shaped. Finally, it is produced by high-temperature calcination to produce a qualitative change, becoming a ceramic for thousands of years. Because of this, it became the definition of generalized ceramics, that is, any product produced by this process can be called a ceramic product, and adding the word “generalized†is different from the definition in the silicate dictionary, because the contemporary ceramic is far It is not just a product of silicate material.
There are two specific methods for the production of contemporary traditional ceramics, dry and wet methods. The dry mud sand raw material is directly processed into molding material and then sent to firing, which is called dry method. The amount of water is directly added to mud sand and grout to make the mud and then processed into a molding material and dried and then sent to the firing, the so-called wet method. The vast majority of ceramic production in the contemporary world is produced using wet processes, and it is certainly scientific and cost-effective. However, as long as the wet process is used, there is a problem of dehydration and drying, that is, the problem of drying wet materials and drying them. Wet-drying is essentially the reduction of water, called dehydration or drying. For example, the mud containing more than 32% water through pressure filtration to obtain a mud cake is dehydrated; the slurry is directly passed through a spray dryer to obtain a granular powder containing about 6% of water for pressure molding and drying; about 18% of the water content is contained The body or the water containing about 6% of the body through the dryer to reduce the water content of the body to the required moisture before entering the kiln is dry. Under normal circumstances, the industry often refers to dehydration at room temperature as dehydration, and dehydration using thermal engineering methods as drying. Mixing, dewatering, and drying are processes that cannot be bypassed in the production of modern ceramics industry. They also require energy consumption, damage to the environment, and have an important impact on product quality, plant occupancy, production line investment, and productivity improvement. The development of new-type industrialized production, clean production and production line should be listed as an innovative topic. Since ancient times, the longest, cleanest and most convenient way to dry is to use solar energy. Drying is one of the ways. The future of dry energy solar energy development should be ranked first and have good prospects, currently only cost issues. One of the lagging points in China's ceramic production is the lack of development of dehydration and drying technologies and equipment.
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