摘要
对适宜于预还原电炉法冶炼钒钛磁铁矿的较高品位钛渣的组成进行研究。根据热力学分析结果和相图中的低熔点区域,建议的高品位直接还原电炉钛渣组成为约50%TiO_2,8%～12%MgO和13%Al_2O_3 (质量分数),二元碱度范围为0.8～1.2。电炉及感应炉验证实验表明,在所推荐的钛渣组成下,可实现渣铁的成功分离。所得的含钒铁水含有0.681%V和0.267%Ti (质量分数);所得钛渣以黑钛石(MgTi_2O_5)为主要物相,其TiO_2品位为52.21%(质量分数)。所得钛渣可满足后续采用酸法浸出回收钛的要求。
The suitable titanium slag composition with high titanium content for electric furnace smelting of vanadium titanomagnetite was investigated through thermodynamics and related phase diagram analysis.According to the thermodynamic results,low-melting-point regions and MgTi2O5primary phase area in the phase diagrams,the suggested titanium slag composition for the present vanadium titanomagnetite metallized pellets should consist of50%TiO2,8%-12%MgO and13%Al2O3(mass fraction)with a binary basicity of0.8-1.2.Finally,the verified smelting experiments were conducted and successful separation of the molten iron from the titanium slag is obtained.The obtained vanadium-containing molten iron contains0.681%V and0.267%Ti,and the obtained titanium slag contains52.21%TiO2(mass fraction),in which MgTi2O5is the primary phase.The titanium resource in the final titanium slag production could be used to produce TiO2pigment by acid leaching methods.
作者
王帅
郭宇峰
姜涛
陈凤
郑富强
唐敏俊
杨凌志
邱冠周
Shuai WANG;Yu-feng GUO;Tao JIANG;Feng CHEN;Fu-qiang ZHENG;Min-jun TANG;Ling-zhi YANG;Guan-zhou QIU(School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,China)
