某地难选钛中矿选矿工艺研究

Study on Beneficiation Process of a Refractory Titanium Middling Ore

某地钛中矿物组成复杂,且粒度分布粗细不均,少量已赤铁矿化、褐铁矿化,并且部分钛磁铁矿磁性、可浮性与钛铁矿相似,属较难分选矿物。针对该矿石性质进行了多种选矿工艺试验研究,确定了弱磁脱除部分磁铁矿、强磁预抛尾、重选与浮选联合处理磁选粗精矿的磁选—重选—浮选联合选矿流程。浮选是回收细粒级钛铁矿的有效方法。增加浮选流程可提高钛精矿中Ti O_2回收率13%,而Ti O_2品位基本不变。在获得最佳浮选条件的基础上,进行了全流程闭路试验,获得了Ti O_2品位47.11%、回收率69.88%的钛精矿,为当地钛矿物的有效回收提供了技术依据。

A titanium middling composition is complex and the disseminated grain size of valuable minerals heterogeneous,some ilmenite has been hematitization and ferritization. Besides,titanic magnetite in magnetism and flotation is similarity to ilmenite,which increase the difficulty in separation from each other. According to the occurrence of the ore properties,many process studies have been done and a combined technical solution of＂magnetite removed by low-intensity magnetic and pre-concentration for tailings discarding by high-intensity magnetic separation,and then handled the rough concentrate by combination of gravity separation with flotation＂is designed.Flotation has been an effective method of recycling fine ilmenite. Adding flotation process could improve the Ti O_2 recovery by 13%,while the grade of Ti O_2 basically remain unchanged. Based on the optimal technical condition,a full process of closed-circuit test is carried out,which obtains a ilmenite concentrate containing 47. 11% Ti O_2 and Ti O_2 recovery of 69. 88%. The research achievement has provided an important basis for the exploitation and utilization of the ilmenite ore in this place.