to split the majority of liberated gangue phases, and then the product was subjected to the next step of separation. The current strength of the magnetic separator was varied in steps of 0.05 ampere from 1.05 to 0.8 A. The procedure was stopped at a current of 0.8 A to have the minimum mass needed for chemical analysis and susceptibility measurements. Since magnetic separations were performed in currents over 0.8 A, MS was not calculated based on Frantz isodynamic separator
equation (v = (20 sina)/I^2 4p; applies only to electromagnet currents of less than 0.8 A