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含铁低品位锡石粉矿,在黄铁矿或 H_2S 产生的含S 非氧化气氛中,400～600℃条件下热处理之后,磁选除去其中的磁性 FeS,然后按分段浮选的方式由非磁性产物中回收 SnS_2,或由 Sn_2S_3及 SnS 之中浮除FeS。硫化过程可以在静止的床层中处理1～1.5小时
Ferrous low-grade cassiterite ore is pyrolytically removed from magnetic FeS in a non-oxidizing atmosphere containing S produced by pyrite or H 2 S at 400-600 ° C., Magnetic products recovered SnS_2, or by Sn_2S_3 and SnS floating FeS. The curing process can be carried out in a stationary bed for 1 to 1.5 hours