Why ceramic plants remove iron
Iron specks in glaze and body are the most visible quality defect in ceramic ware. They show up as black spots on glazed surfaces after firing, lower the first-quality yield for tile, sanitaryware and tableware, and bring rework and customer complaints. Removing the iron before firing is cheaper than rejecting the ware afterwards.
Slurry stage: wet electromagnetic separator
Glaze, body slurry and frit slurry are cleaned with a wet electromagnetic separator that runs continuously on the slurry line. Water or oil cooling keeps the coil temperature stable so field strength stays consistent, and piped and tank designs adapt to existing slurry lines. Wet units are configured to your slurry, so we do not print a catalogue figure; a datasheet is issued with the quotation. Where the feed is kaolin or feldspar, see kaolin and feldspar iron removal. PTMS also supplies the SHMP and STPP dispersants used on kaolin and ceramic slurry, which help liberate iron so the magnet can capture it; they do not replace the separator.
Dry powder stage: dry electromagnetic separator
Ceramic dry powder and dried raw materials such as quartz and feldspar are cleaned on dry electromagnetic separators, which also catch weakly magnetic oxides and scale-like corrosion contaminants. The current models are PT3A160, PT20A600, PT25A600 and PT1000; the PT20A600 is published at 2.5 T, 20 kW maximum coil power, water and oil double cooling, 600 mm magnetic cavity and 2–4 t/h, and datasheets for the other models are issued on request. See the dry model guide.
Permanent-magnet iron removers (custom-made)
For raw-material and glaze lines the permanent-magnet range includes the JPX-CCY series (glaze and raw-material iron removal) and the CBJ series (magnetic rod-group iron removers for slurry lines). These are custom-made to the project, so they have no fixed catalogue figures, and a datasheet per project is issued on request. Permanent units draw no power; see permanent magnetic separator models.
What to send
What you are cleaning (glaze, body slurry, frit or dry powder), solids content for slurry, particle size, hourly throughput, current iron content and the defect you see, and your destination port or country. Send 2–5 kg of the material for the free sample test; the report is issued within 5 days.
Next step: send us your material details (or WhatsApp +86 139 2990 7491) and we reply with a matched model and a quotation. Our FAQ states that a test on a sample of your material comes first, and that no iron-reduction figure is quoted without a test.