硫铁矿焙烧后矿物晶形被破坏，质地疏松，呈微细粒嵌布，属难选矿物。采用简单的弱磁选和重选方法不能获得理想的分选指标。苏州硫酸厂烧渣采用细磨─酸洗─弱磁选─反浮选联合流程，可以从含铁５２．１５％的烧渣中分离出含铁５９．７５％的铁精矿，总回收率８２．７２％。为充分利用烧渣提供了新的途径。 Calcined pyrite mineral crystal shape is destroyed, loose texture, was micro-embedded cloth, is a refractory mineral. The use of simple weak magnetic separation and re-election method can not get the ideal sorting index. Suzhou sulfuric acid plant slag using fine grinding ─ pickling ─ weak magnetic separation ─ reverse flotation combined process, from 52.15% of the iron slag separation of iron containing 59.75% iron concentrate, the total recovery 82.72%. To make full use of slag provides a new way.