Abstract: The paper presents the application of electromagnetic and permanent magnetic tramp iron removers,analyzes briefly the merits and defects of electromagnetic ones (air cooled,water cooled,oil cooled,vibration type,super conducting type,etc.)and permanent magnetic ones (belt type,plate type,turnover type,pipe type,grid frame type,drum type,etc.)and discusses its research orientation.

Key words: Tramp iron remover, Electromagnetic iron remover, Permanent iron remover