B28C 1/222

Apparatus or methods for obtaining or processing clay for processing clay-containing substances in non-fluid condition {; Plants} specially adapted for homogenising, comminuting or conditioning clay in non-fluid condition or for separating undesired admixtures therefrom combined with means for conditioning by heating, humidifying, or vacuum treatment {, by cooling, by sub-atmospheric pressure treatment by moistening, e.g. by steam}