Iron impurities in a fired ceramic product cause serious structural defects (nicks and cracks on the surface, or throughout the ceramic mass). Weakly magnetic fine iron and iron minerals also affect the color and brightness, which is particularly fatal where white ceramics are used, such as crockery, tiles or sanitary ware. This ferrous contamination is successfully removed through the use of high-intensity magnetic separators. The areas of application include:

Article on magnetic properties of ceramic minerals