An investigation into magnetic roasting-separation of refractory iron ore in Suspended state

摘要

Aiming at the disadvantages of traditional magnetic roasting process, suspension calcining process was suggested to dispose refractory iron ore. The experiment indicated that under the conditions of 750°C～850°C, CO volume percentage was 1%, the limonite and siderite could efficiently transformation into magnetite, which only needed 10～20 secs. Tests of roasting-magnetic separation could attained results as: concentrate iron grade be 49.26%, recovery of iron be 87.28%.