Company cases about Two-stage High-precision Magnetic Separation Renovation for Sanitary Ceramic Glaze Workshop in Foshan Cuts Glaze Pinhole

Two-stage High-precision Magnetic Separation Renovation for Sanitary Ceramic Glaze Workshop in Foshan Cuts Glaze Pinhole

2026-07-21

a high-end sanitary ceramic manufacturer in Nanhai, Foshan carried out iron removal upgrading on glaze slurry production lines. Imported kaolin and feldspar slurry contain ultra-fine weak magnetic iron oxide particles, which form dense pinholes and black spots on toilet and bathroom cabinet ceramic surfaces after glazing and firing. The yield of high-end export sanitary ware was only 71%, and European and American clients repeatedly required quality rectification.

Self-cleaning rotary permanent magnet grate magnets are installed at ball mill outlets to dynamically agitate high-viscosity glaze slurry and prevent powder accumulation covering magnetic rods for pre-removal of coarse iron impurities. Wet high-gradient slurry electromagnetic separators are connected in series before glazing procedures, with multi-layer steel wool magnetic media capturing ultra-fine weak magnetic impurities of 0.2–6μm. The equipment is equipped with an automatic backwashing system to support 24-hour uninterrupted circulating slurry production without blockage. The stable sorting precision of the magnetic system is not affected by fluctuations in slurry viscosity.

After transformation, iron content of glaze slurry drops from 0.45% to 0.05%, and glaze surface defects of sanitary products are reduced by 95%. Export orders of high-end ceramic products increased by 48% year-on-year. The factory plans to purchase the same two-stage high-precision magnetic separation equipment for 4 newly expanded glaze production lines in Phase III construction.

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