PHYSICO-CHEMICAL PROPERTIES OF RAW MATERIALS USED TO OBTAIN FINE CERAMICS

Abstract

The moisture content of pressed wood is 9-11%. The pressed powder is
moistened with water or steam until it has the desired moisture content. It does not
require natural drying or spending on drying porches, but it lasts for a long time (10-
15 days). In addition, a large space is required for natural drying. Currently, in large
factories, raw materials are usually artificially dried in intermittent chamber dryers
and continuous tunnel dryers. In this method, the drying time for raw materials is 1-3
days, and for thin items, it takes several hours. In the production of all fine ceramics,
95-97% of the product is formed by the strapping method, and 3-5% of the product is
formed by casting in a plaster mold. By means of belt molding, porcelain and
earthenware products, insulators, bowls and other fine ceramic products are produced.
In this case, the moisture content of the ceramic mass ranges from 17% to 28%,
depending on the type of product.