Magnetic Bar Grille Type Iron Remover - Industry Application Cases 1

A large-scale pigment production enterprise mainly manufactures fine chemical products such as titanium dioxide pigments and organic pigments, which are widely used in coatings, printing inks and other fields. During the production process, after grinding and dispersing, pigment slurries are prone to mixing with ferromagnetic impurities such as iron filings generated by equipment wear and pipeline rust particles. These impurities will cause the pigment color to darken and gloss to decrease, and at the same time affect the stability of subsequent coating products, resulting in problems such as coating peeling and color difference, which seriously affect product qualification rate and market reputation.

After introducing the magnetic bar grille type iron remover, the enterprise installed the equipment on the conveying pipeline of the pigment slurry after grinding. According to the slurry particle size (about 500 mesh) and the processing capacity of 20 m³ per hour, a strong magnetic bar grille structure with a spacing of 5 mm and a magnetic field strength of 12,000 Gs was customized. When the slurry flows through the grille, micron-level ferromagnetic impurities are firmly adsorbed on the surface of the magnetic bars. Tests show that the iron impurity content in the slurry after iron removal has decreased from 80 ppm to below 5 ppm. At the same time, the equipment adopts 304 stainless steel as the contact material, which is resistant to corrosion by weak acidic media in the pigment slurry and does not pollute the material. In daily maintenance, operators manually extract the magnetic bars for cleaning every 8 hours, and each cleaning only takes 15 minutes without stopping the machine, effectively ensuring production continuity. After being put into use, the uniformity of product color has increased by 30%, and the qualification rate has increased from 88% to 99.5%, which has greatly reduced the rework loss caused by impurity problems.