Research on Beneficiation Process of Gansu Low-grade Ilmenite
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摘要: 甘肃某低品位原生钛铁矿TFe和TiO2的含量分别仅为12.23%和3.80%,针对铁和钛的赋存状态和嵌布粒度特点以及矿区严重缺水的现状,制定了干式中强磁磁选预抛尾、细磨弱磁选选铁、强磁选与浮选联合选钛组合技术方案,研究了磨矿细度、磁感应强度等的影响,在获得最优工艺条件的基础上,进行了全流程闭路试验。试验获得了含Fe 60.57%的铁精矿、含TiO246.15%的钛精矿,铁的回收率为35.41%,钛回收率达66.19%,实现了矿石中铁和钛资源的综合回收。Abstract: A kind of low-grade ilmenite from Gansu province with Fe grade of 12.23% and TiO2 grade of 3.80% was studied.In view of the occurrence state and percentage of Fe and Ti in the ore and acute shortage of water in the mining area,a combined technical solution of "pre-concentration for tailing discarding by dry medium-intensity magnetic separation-iron separation by fine grinding and low-intensity magnetic separation-titanium separation by combination of high-intensity magnetic separation with flotation" was designed.The effects of relevant factors(ground particle size and magnetic induction intensity,etc.) on test results were investigated.Based on the optimal technical condition,a full process of closed-circuit test was carried out.The obtained iron concentrate had a Fe grade of 60.57% and titanium concentrate had a TiO2 grade of 46.15%,and the recovery rates of Fe and Ti reached 35.14% and 66.19% respectively,realizing efficient and comprehensive recovery of iron and titanium resources in the ore.
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