Abstract: Because of the different dissemination size and short range of single type magnetic separator，developed new type self-service dry-type high intensity permanent magnetic separator，self-service wet-type high intensity permanent magnetic separator and wide-gradient vertical-ring high-intensity magnetic separator.By combining these three high intensity magnetic separators，can classification-magnetic separate different size minerals.A manganese carbonate ore with the grade of 22.44% from an underground mine at home which were processed by self-service dry-type high-intensity permanent magnetic separator，self-service wet-type high-intensity permanent magnetic separator and wide-gradient vertical-ring high-intensity magnetic separator，respectively，resulting in a total concentrate yield of 67.98%，a total concentrate grade of 31.16% with a recovery of 95.87% and a total tailings grade of 2.90%.An iron ore from Africa with the grade of 42.36% which were processed with self-service dry-type high-intensity permanent magnetic separator，self-service wet-type high-intensity permanent magnetic separator and wide-gradient vertical-ring high-intensity magnetic separator，respectively，resulting in a total concentrate yield of 53.41%，a total concentrate grade of 64.09% with a total recovery of 80.83%，and a total tailings grade of 17.44%.The application practices show that this combined high intensity magnetic separators can enlarge the range of separation size fraction and have the value of popularization and application.

Key words: Weakly-magnetic minerals, Self-service dry-type high-intensity permanent magnetic separator, Self-service wet-type high-intensity permanent magnetic separator, Wide-gradient vertical-ring high-intensity magnetic separator, Magnetic separation of coarse particles