Separation and recovery of iron and nickel from low-grade laterite nickel ore by microwave carbothermic reduction roasting
Separation and recovery of iron and nickel from low-grade laterite nickel ore by microwave carbothermic reduction roasting
复制标题
微波碳热还原焙烧从低品位红土镍矿中分离回收铁镍
DOI：
10.1016/j.jmrt.2020.08.036
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发表时间：
2020-11-01
影响因子：
6.4
通讯作者：
Pang, Qinghai
中科院分区：
文献类型：
--
作者：
Zhang, Junhong;Gao, Lihua;Pang, Qinghai
报道了一种利用微波碳热还原焙烧实现低品位红土矿中铁镍分离回收的有效策略。在这项工作中，我们确定了磁选过程中铁和镍分离不良的根本原因。初步考察了低品位红土矿微波碳热还原焙烧过程中操作参数对镍、铁回收分离的影响，揭示了镍、铁分离不良的根本原因。然后，通过扫描电子显微镜/能谱仪和X射线衍射仪对红土矿物组成中铁沸石Fe2SiO4和斜方沸石Fe2-xMgxSiO4的相变和界面还原进行了系统的研究，以确定CaO和MgO对Fe2SiO4分级还原行为的影响。微波碳热还原焙烧过程中的相变按以下步骤进行：(Fe，Ni)(2)SiO4(x=0)和Mg-x(Fe，Ni)(2-x)SiO4(0
An effective strategy to achieve separation and recovery of iron and nickel from low-grade laterite ore via microwave carbothermic reduction roasting is reported. In this work, we determined the underlying reason for the poor separation of iron and nickel during the magnetic separation process. The effect of operating variables on the recovery and separation of nickel and iron from low-grade laterite ore was initially investigated during microwave carbothermic reduction roasting to reveal the underlying reason for their poor separation. Then, the phase transformation and interfacial reduction of fayalite Fe2SiO4 and hortonolite Fe2-xMgxSiO4 in the mineral composition of laterite were systemically investigated via SEM/EDS and XRD analysis to determine the influence of CaO and MgO on the stepwise reduction behavior of Fe2SiO4. Phase transformation during the microwave carbothermic reduction roasting process by microwave irradiation heating occurred according to the following steps: (Fe,Ni)(2)SiO4 (x = 0) and Mg-x(Fe,Ni)(2-x)SiO4 (0