某钛铁矿选矿工艺探索研究

Research on mineral processing technology for an ilmenite ore

某地钛铁矿的嵌布粒度不均匀、脉石矿物角闪石因含钛铁矿或磁铁矿包裹体而磁性增强,钛的理论回收率仅65%左右.针对该矿的矿石性质,采用阶段磨矿阶段选别的工艺回收钛铁矿,即将原矿磨至53.37%-0.074mm后,采用一粗一精强磁选获得钛粗精矿,粗精矿再磨至80%-0.074mm后经二次强磁精选,一次中磁选脱铁.在原矿TiO2品位7.93%时,获得钛精矿TiO2品位48.10%、回收率45.82%的指标.

An ilmenite ore possesses the following properties：dissemination size of ilmenite is uneven;the magnetism of gangue mineral hornblende is enhanced by ilmenite or magnetite inclusions in it;the theoretical recovery rate of TiO2 is only about 65%.In view of these properties,the stage grinding and the stage separation were used to recycle ilmenite.First,the rough titanium concentrate was gained by one roughing and one cleaning for high-intensity magnetic separation after the crude ore was grinded to 53.37%-0.074 mm.Then,iron was removed via the second high-magnetic separation and one medium-magnetic separation after the rough ilmenite concentrate was grinded to 80%-0.074 mm.When the TiO2 grade of crude ore was 7.93%,ilmenite concentrate was obtained with TiO2 grade of 48.10%and recovery of 45.82%.