论文部分内容阅读
采用扫描电子显微镜和EDS能谱研究低品位红土镍矿深度还原过程中金属颗粒的生长行为,并在此基础上分析其还原机理。结果表明,金属铁和镍逐渐聚集生长为Fe-Ni颗粒,并且颗粒粒度随着还原温度的升高和还原时间的延长而明显增大。还原后,红土镍矿明显变为Fe-Ni金属颗粒和渣相基体两部分。铁镁橄榄石的还原与其晶体化学特性密切相关。铁和镍的氧化物被还原剂还原为金属铁和镍,同时,橄榄石的晶格结构被破坏。红土镍矿深度还原包含金属氧化物还原和金属相生长两个过程。
The growth behavior of metal particles during deep reduction of low-grade laterite nickel ore was studied by scanning electron microscopy and EDS spectroscopy, and the reduction mechanism was also analyzed. The results show that the metal iron and nickel gradually gather and grow into Fe-Ni particles, and the particle size increases obviously with the increase of the reduction temperature and the reduction time. After reduction, lateritic nickel ore obviously becomes two parts of Fe-Ni metal particles and slag phase matrix. The reduction of iron-forsterite is closely related to its crystallographic properties. The oxides of iron and nickel are reduced to metallic iron and nickel by the reducing agent, and at the same time, the lattice structure of the olivine is destroyed. Laterite nickel ore deep reduction contains metal oxide reduction and metal phase growth of two processes.