Production of ferronickel from limonitic laterite ore using hydrogen reduction and cementation was studied by relying on a novel hydrometallurgical process consisting of the key steps: calcination, reductive roasting with hydrogen gas, 2-stage atmospheric hydrochloric acid leaching, and cementation with Fe. The introduction of the reusability of H₂-reduced limonitic laterite as a cementation agent instead of conventional Fe sources is an important approach of the proposed process in terms of enhancing cost-effectiveness. The effects of the type of Fe source, the amount of cementation agent, and the temperature on Ni cementation were experimentally determined. The kinetic analysis confirms that Ni cementation behavior can be elucidated by applying 1st order reaction kinetic principles, and the temperature is the most effective parameter. Based on the linear relationship of empirical data with the 1st order kinetic model and by the calculations associated with Arrhenius law, the value of the activation energy of Ni cementation onto Fe could be deduced as 7.5 kJ/mol. Greater than 99% of Ni could be recovered under the most suitable conditions, and the final product was obtained as ferronickel cement (Ni 10%), which can be applied in steel smelter as a prominent intermediate.

依靠一种新颖的湿法冶金工艺，研究了由氢还原和胶结法从氧化铁皮红土矿石中生产镍铁的过程，该工艺包括以下关键步骤：煅烧，氢气的还原焙烧，两阶段大气盐酸浸出和Fe的胶结。H ₂的可重用性介绍就提高成本效益而言，用还原铁屑红土代替胶凝剂代替传统的铁源是拟议方法的重要方法。实验确定了铁源类型，渗碳剂用量和温度对渗碳镍的影响。动力学分析证实，通过应用一级反应动力学原理可以阐明镍的胶结行为，而温度是最有效的参数。根据经验数据与一阶动力学模型的线性关系，并通过与阿伦尼乌斯定律相关的计算，可以得出Ni固结在Fe上的活化能值为7.5 kJ / mol。在最合适的条件下，可以回收到超过99％的镍，