Ceramics Industry

Iron contamination in a fired ceramic product causes serious defects including surface and body cracks, black spots, and indentations.  Such contaminated ceramics are rejected once produced and either re-introduced as a raw material or discarded as waste.  The presence of weakly magnetic fine iron and mineral iron also affects the colour and brightness of glaze, especially on white ceramics such as tableware, tiles and sanitaryware.  Such iron contamination originates in the ceramic raw material (e.g. feldspar, clay) in the form of minerals, and from tramp metal introduced in the manufacturing process.  Whether originating as mineral iron ro iron contamination, these magnetic particles are successfully removed using different designs of high intensity Magnetic Separators located at specific points in a ceramics plant.  Successful removal significantly reduces end product reject, reducing waste and re-work, whilst boosting the proportion of grade 1 product.


Technical Articles

Typical Applications:


  • Cleansing of free fine iron from ceramic slips and glazes with high intensity Electro Magnetic Filters. Such high-intensity magnetic separation removes even the smallest and weakest magnetic particles, which when removed looks like a fine oil;
  • Permanent magnet Liquid Pipeline Separators are located in pipework, often as a last capture point prior to the application of glaze;
  • Fine iron removal from spray dried ceramics and powders using high intensity Drum Magnets and Rare Earth Roll Separators;
  • General iron removal from dry ceramics and mineral raw materials using Tube & Grid Magnets, Bullet Separators, and Plate Magnets;
  • Purification of non-metallic minerals used in the manufacture of ceramics (e.g. feldspar, silica sand) using a Rare Earth Roll Separator or Induced Roll Separator;