基于还原焙烧的某海滨钛磁铁矿的钛铁分离

为了高效分离印尼某高铁钛、低硫磷海滨钛磁铁矿中的钛铁，实现资源的充分利用，采用直接还原焙烧-磨矿-弱磁选工艺对该试样进行了还原焙烧工艺技术条件研究，并对确定条件下的焙烧产物进行了不同磨矿细度下的钛铁分离验证试验。结果表明，添加剂NCS对铁还原和钛铁分离有促进作用；在烟煤A用量（与试样的质量比）为30%、NCS用量为11%、还原焙烧温度为1 250 ℃、还原焙烧时间为60 min、磨矿细度为-43 μm占6902%、弱磁选磁场强度为151 kA/m的情况下，可获得TFe品位为9374%、回收率为9591%、TiO₂品位为045%的还原铁粉，实现了钛铁的高效分离；钛在尾矿中的富集为后续回收钛创造了条件。

Titanium and Ferrum Separation of a Seaside Titanomagnetite based on Reduction Roasting

A seaside titanomagnetite in Indonesia belongs to bench ores with high Titanium-Ferrum and low sulfur-phosphorus. In order to realize high efficient separation of titanomagnetite and achieve full utilization of resources，conditioning tests of reduction roasting process is made by adopting the process of direct reduction roasting - grinding - low intensity magnetic separation. The results showed that under the condition of bituminous coal A usage of 30%，the amount of additive NCS 11%，reduction roasting temperature at 1 250 ℃ for 60 min，grinding fineness of -43 μm 6902%，and low intensity magnetic field strength of 151 kA/m，the reduced iron powder with TFe grade of 93.74%，recovery of 95.91% and TiO₂ grade of 0.45% was obtained with high efficient separation of Titanium-Ferrum,the enrichment of titanium in tailings providing prerequisites for its recycling.