This standard specifies the product classification, technical requirements, test methods, inspection rules, signs, labels, instructions for use, packaging, transportation and storage of permanent magnet magnetic rollers. This standard applies to permanent magnet magnetic rollers. This machine is mainly used for dry separation of strong magnetic minerals with a magnetization coefficient of not less than 3000×0.000001cm3/g. It can also be used to remove magnetic substances in materials, such as iron nails in foundry sand.