铝热自蔓延还原氧化铪实验研究  

Experimental Investigation for Self-propagating Aluminum Thermal Reduction of Hafnia

作　　者：刘海 马朝辉 黄景存 王力军 LIU Hai;MA Zhaohui;HUANG Jingcun;WANG Lijun(National Engineering Laboratory of Biohydrometallurgy,GRINM Group Co.,Ltd.,Beijing 100088,China;GRINM Resources and Environment Tech.Co.,Ltd.,Beijing 100088,China;General Research Institute for Nonferrous Metals,Beijing 100088,China)

机构地区：[1]有研科技集团有限公司生物冶金国家工程实验室,北京100088 [2]有研资源环境技术研究院(北京)有限公司,北京100088 [3]北京有色金属研究总院,北京100088

出　　处：《原子能科学技术》2020年第4期671-677,共7页Atomic Energy Science and Technology

基　　金：国家重点研发计划项目资助(2017YFB0305400)。

摘　　要：本文采用化学分析、X射线衍射(XRD)与扫描电子显微镜(SEM)等手段和方法,对铝热自蔓延还原氧化铪方法进行实验研究。结果表明,在物料单位发热量大于3000 kJ/kg的条件下,可实现氧化铪的直接还原,原料加入CaO后,产物的渣金分离效果明显。XRD分析结果表明,还原产物为Al3Hf金属间化合物;SEM和能谱仪(EDS)分析结果表明,金属产物呈现片状,不规则线性排列,由Al3Hf相区和Al相区组成;化学分析结果表明,金属产物中氧含量低至0.20%,铪含量高达41.20%。The experiment of self-propagating aluminum thermal reduction of hafnia was investigated with the X-ray diffraction(XRD),scanning electron microscope(SEM)and chemical analysis.The results show that hafnia can be reduced when the heat of reaction per unit mass is greater than 3000 kJ/kg and the separation of slag-metal is good after adding the calcium oxide.The results of XRD analysis show that reduced product is Al3Hf mainly.The results of SEM/energy disperse spectroscopy(EDS)show that metal product,which is composed of Al3Hf phase and Al phase,is lamellar and irregular arrangement.The chemical analysis results show that the oxygen content of the metal is as low as 0.20%and the hafnium content is up to 41.20%.

关 键 词：铝热还原 自蔓延反应 HFO2 Al3Hf 渣金分离 

分 类 号：TF841.4[冶金工程—有色金属冶金]