高铁铝土矿铁铝分离新工艺过程有价组元迁移及其强化机制

High iron bauxite is a Fe-Al composite ore with quite big reserve in China, in which superfine aluminum and ferrous minerals are conjoint with each other. Thus, it is difficult to be separated through physical beneficiation. Along with growing demand for iron ore and aluminum resource in our country, high effective utilization of high iron bauxite has been included in the national long-term science and technology development planning. The development of efficient using technology for high iron bauxite has great significance on resource security of China's iron ore and aluminum. This project constructs the new process route of high iron bauxite metallization reduction - efficient dressing - extracting aluminum from separating tailings, which achieves efficient separation of iron and aluminum from high iron bauxite and simplifies the technological process. For the key link of the new technology, metallurgical thermodynamics and kinetics, metallurgy, process mineralogy and modern testing techniques are fully combined to study the iron and aluminum separation process reaction thermodynamics and kinetics, phase transformation and element migration rules, iron particles aggregation mechanism, influencing factors and controlling conditions, valuable element selective leaching, et al. This project clarifies valuable element migration and strengthening mechanisms in the new process of separating Fe and Al from high-iron bauxite prominently, which is contribute to lay foundation of efficient and cleaning utilization for high iron bauxite and to perfect theory and innovate methods for the utilization of high iron bauxite in China.

高铁铝土矿是我国重要的铁铝复合矿产资源，储量巨大。但由于矿中铁铝嵌布胶合、密切共生，铁铝分离极为困难，到目前为止，高铁铝土矿未得到有效地开发利用。随着我国对铁矿和铝矿资源需求的日益增加，高铁铝土矿的高效利用已列入国家中长期科技发展规划，开发高铁铝土矿高效利用技术对于我国铁矿和铝矿资源安全具有重要意义。本项目构建了高铁铝土矿金属化还原-高效分选-分选尾矿提铝新工艺路线，突破性的利用高铁铝土矿原矿实现铁铝的高效分离，简化了工艺流程。针对新工艺的关键环节，充分结合冶金热力学和动力学、冶金学、工艺矿物学以及现代测试技术，系统研究铁铝分离过程反应热力学和动力学、相变和有价组元迁移规律、铁晶粒聚集长大机理、影响因素及其控制条件、有价组元选择性浸出等关键科学问题，重点阐明高铁铝土矿利用新工艺过程有价组元迁移及其强化机制，为高铁铝土矿高效清洁综合利用奠定基础，实现我国高铁铝土矿利用的理论完善和方法创新。

高铁铝土矿是我国重要的铁铝复合矿产资源，储量巨大。但由于矿中铁铝嵌布胶合、密切共生，铁铝分离极为困难，到目前为止，高铁铝土矿未得到有效地开发利用。随着我国对铁矿和铝矿资源需求的日益增加，高铁铝土矿的高效利用已列入国家中长期科技发展规划，开发高铁铝土矿高效利用技术对于我国铁矿和铝矿资源安全具有重要意义。本项目构建了高铁铝土矿金属化还原-高效分选-分选尾矿提铝新工艺路线，突破性的利用高铁铝土矿原矿实现铁铝的高效分离，简化了工艺流程。针对新工艺的关键环节，充分结合冶金热力学和动力学、冶金学、工艺矿物学以及现代测试技术，系统研究了铁铝分离过程反应热力学和动力学、相变和有价组元迁移规律、铁晶粒聚集长大机理、影响因素及其控制条件、有价组元选择性浸出等关键科学问题，重点阐明了高铁铝土矿利用新工艺过程有价组元迁移及其强化机制，为高铁铝土矿高效清洁综合利用奠定基础，实现了我国高铁铝土矿利用的理论完善和方法创新。