The method of removing iron from ceramic raw materials depends on the type of raw materials and the grinding process. For example, iron containing minerals containing coarse particles should be removed by hydrocyclone separation or elutriation before crushing. If a Raymond machine is used to crush hard raw materials, a dry strong magnetic separator can be used to remove iron or permanent magnets in the pipeline. After wet milling and fine crushing, the wet magnetic separator is used to remove iron, and its magnetic field strength is greater than 8000 Gauss. During operation, the concentration and flow rate of slurry must be strictly controlled. In order to improve the efficiency of iron removal, strong magnetic separators can be used in series or in conjunction with vibrating screens for repeated 2~3 times.