基于还原焙烧的某海滨钛磁铁矿的钛铁分离  

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

作　　者：高恩霞[1,2] 孙体昌[1,2] 徐承焱[1,2] 刘志国[1,2] 刘真真[1,2] 于春晓[1,2] 

机构地区：[1]北京科技大学土木与环境工程学院 [2]金属矿山高效开采与安全教育部重点实验室

出　　处：《金属矿山》2013年第11期46-48,52,共4页Metal Mine

摘　　要：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-43μm占69.02%、弱磁选磁场强度为151 kA/m的情况下,可获得TFe品位为93.74%、回收率为95.91%、TiO2品位为0.45%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。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, condi- tioning tests of reduction roasting process is made by adopting the process of direct reduction roasting - grinding - low inten- sity magnetic separation. The results showed that under the condition of bituminous coal A usage of 30% , the amount of ad- ditive NCS 11% , reduction roasting temperature at 1 250℃ for 60 min, grinding fineness of - 43μm 69. 02% , and low in- tensity 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 railings providing prerequisites for its recycling.

关 键 词：海滨钛磁铁矿 还原煤 添加剂 直接还原焙烧 钛铁分离 

分 类 号：TF792[冶金工程—钢铁冶金]