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Longbai Group has obtained a patent for an iron-removal device used in the production of titanium dioxide via the sulfuric acid method. The magnetic rods can be easily removed, thus preventing contamination of the material tank. According to news dated February 18, 2025, information from the Intellectual Property Office shows that Longbai Group Co., Ltd. has been granted a patent titled “An Iron-Removal Device for Titanium Dioxide Production by the Sulfuric Acid Method”. The patent number is CN 222490437 U, and the application was filed in May 2024. The patent abstract indicates that this utility model relates to the technical field of titanium dioxide production equipment, and discloses an iron-removal device for sulfuric acid process titanium dioxide production, which includes a material tank and an iron-removal component arranged within the material tank ； The material trough is rectangular in shape, with its rear and upper surfaces open ； Rear card slots are symmetrically arranged on the rear side of the left inner wall and on the rear sides of the right inner wall of the material chute ； The iron removal component includes several magnetic rods, a front fixing plate, a rear fixing plate, and a connecting plate ； Several magnetic rods are arranged in sequence from left to right ； Several jacks are arranged from left to right on both the front fixing plate and the rear fixing plate ； The front ends of several magnetic rods all pass through the holes in the front fixing plate, while the rear ends of several magnetic rods all pass through the holes in the back fixing plate ； The left and right sides of the rear fixing plate are inserted into the respective rear slots on the left and right sides, while the front end of the magnetic rod makes contact with the bottom of the material slot. The magnetic rod of this utility model is easy to remove, and no iron impurities are shed into the material tank during the removal process, thus preventing contamination of the tank.