The tailings from the concentrator of SanXin Gold & Copper Limited - liability Company contains 9.45％ Fe,among which the siderite is the main one able to be recovered. Directed at the properties of the tailings, the study on processing mineralogy and beneficiation was performed. Through explorative experiments of the technological flowsheets of flotation and magnetic separation, the optimal technology of high-intensity magnetic separationmiddling alkali leaching-oxidization—magnetic separation was determined to recover the siderite. At last, the iron concentrate of 41.72％ Fe with the recovery of48.51％ was obtained. The beneficiation index is satisfactory. At the same time, it also provides reliable basis for the recovery of this kind of low - grade and refractory siderite.%三鑫金铜股份有限公司选矿厂尾矿中含铁为9.45%,可回收的矿物主要是菱铁矿,针对尾矿性质进行了工艺矿物学和选矿试验研究.通过浮选、磁选工艺流程的探索试验,最终确定了适合该尾矿中菱铁矿回收的较佳工艺流程为"强磁-中矿碱浸出-氧化-磁选".通过该工艺流程,进行湿法回收,可获得Fe品位为41.72%、回收率为48.51%的铁精矿的较好指标,并为国内其他类似低品位难选菱铁矿的回收利用提供了可靠的依据.
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