离子液体低温电解还原钛铁矿制备钛铁合金的研究

项目名称： 离子液体低温电解还原钛铁矿制备钛铁合金的研究

项目编号： No.51274108

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 华一新

作者单位： 昆明理工大学

项目金额： 80万元

中文摘要： 钛铁合金在钢铁工业、能源新材料和磁性材料等领域具有广阔的工业应用前景。本项目针对我国钛资源储量丰富且以钛铁矿为主的特点以及现行钛铁合金制备工艺存在的问题，以钛铁矿为原料，通过矿相重构使钛铁矿转化为导电性良好的Fe/TiO2复合电极材料，用离子液体作为电解质在低温下将复合电极中的TiO2原位还原并与其中的铁生成钛铁合金。主要研究钛铁矿的矿相重构机制及其与导电性和电化学性质的关系；复合电极中TiO2原位还原的电化学行为及其电荷和物质迁移规律；钛铁合金在离子液体电化学原位还原过程中的成核与生长规律；离子液体的组成、添加剂、电流密度、槽电压及温度等参数对电耗和电流效率的影响规律；测定离子液体物理化学性质并研究其在电解过程中的稳定性和电化学行为。研究工作对从源头上显著降低钛铁合金的生产成本，减少排放，提高产品附加值，解决我国钛资源的经济合理利用问题，具有重要的科学意义和广阔的工业应用前景。

中文关键词： 钛铁矿；钛铁合金；电解还原；氯化物熔盐；离子液体

英文摘要： Ferrotitanium has been extensively applied in iron and steel industry as well as new energy and magnetic materials. In order to use abundant ilmenite resources in China and solve the problems existing presently in the preparation of ferrotitanium, this project will directly use ilmenite as a raw material to prepare ferrotitanium. By means of the mineral phase transformation, the ilmenite is firstly transformed under reducing atmospheres into the Fe/TiO2 composite electrode materials with good electric conductivity. The composite electrode as a cathode is then electrolyzed at low temperatures by using ionic liquids as electrolytes and graphite as an anode to produce ferrotitanium through the in-situ reduction of TiO2 at the cathode. The major research contents include: the mineral phase transformation mechanism of ilmenite and the dependence of its electric conductivity and electrochemical properties on the mineral structural change; the electrochemical behavior of in-situ reduction of TiO2 from the composite electrode and the corresponding charge and mass transfer mechanism during the reduction; the nucliation and growth of ferrotitanium during the electrochemical reduction process from composite electrode in ionic liquids; the effect of ionic liquid composition, additives, current density, cell voltage, tempera

英文关键词： Ilmenite；ferrotitanium alloys；electrochemical reduction；chloride molten salts；ionic liquids