Enrichment of Ni-Mo-V via pyrometallurgical reduction from spent hydrogenation catalysts and the multi-reaction mechanism  

作　　者：Zhi-Sheng Shi Yun-Ji Ding Xi-Ping Yin Bo Liu Han-Lin Shen Bo-Yu Wu Bao-Huai Zhao Feng-Lan Han Christian Ekberg Shen-Gen Zhang 

机构地区：[1]Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing 100083,China [2]Shunde Innovation School,University of Science and Technology Beijing,Foshan 528399,China [3]Institute of Engineering Technology,SINOPEC Catalyst Co.,Ltd.,Beijing 101111,China [4]School of Material Science and Engineering,North Minzu University,Yinchuan 750021,China [5]Nuclear Chemistry and Industrial Material Recycling,Department of Chemistry and Chemical Engineering,Chalmers University of Technology,Gothenburg 41296,Sweden

出　　处：《Rare Metals》2023年第8期2700-2712,共13页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.U2002212,52204412 and 52102058);the National Key R&D Program of China(Nos.2019YFC1907101,2019YFC1907103 and 2021YFC1910504);the Key R&D Program of Ningxia Hui Autonomous Region(No.2021BEG01003);Guangdong Basic and Applied Basic Research Foundation(No.2020A1515110408);Foshan Science and Technology Innovation Special Foundation(No.BK21BE002);the Fundamental Research Funds for the Central Universities(Nos.FRFTP-20-031A1 and FRF-BD-20-24A)。

摘　　要：Spent hydrogenation catalysts are important secondary resources due to richness in the valuable metals of Ni,Mo and V.Recovery of valuable metals from spent catalysts has high economic value and environmental benefits since they are hazardous wastes as well.Traditional recycling processes including hydrometallurgical leaching and soda roasting-leaching have disadvantages such as generating large amounts of wastewater,long process,and low recovery efficiency of valuable metals.Thus,this paper proposed synergistic enrichment of Ni,Mo and V via pyrometallurgical reduction at 1400-1500℃.The melting temperature and viscosity of slag were reduced through slag designing by software FactSage 7.1.The phase diagram of Al_(2)O_(3)-Cap-SiO_(2)-Na_(2)O-B_(2)O_(3)was drawn,and low-temperature region(≤1300℃)was selected as target slag composition.Ni,Mo,and V can be collaborative captured and recovered through the mutual solubility at molten state.Increasing the melting temperature and the amount of CaO,Na_(2)O and C were conducive to improving the metals recovery rates.The kilogram-scale experiments were carried out,and the recovery efficiencies of Ni,Mo and V were 98.3%,95.3%and 97.9%under optimized conditions:at 1500℃,with the basicity of 1.0,13.1 wt%SiO_(2),7.0 wt%B_(2)O_(3),7.7 wt%Na_(2)O and 20.0wt%C.The distribution behavior of valuable metals was clarified by investigating the melting process of slag and the reduction in valuable metals.Ni was preferentially reduced and acted as a capturing agent,which captured other metals to form NiMoV alloys.

关 键 词：Spent hydrogenation catalysts(SHC) Pyrometallurgical reduction Slag design ENRICHMENT Settlement 

分 类 号：TF815[冶金工程—有色金属冶金] X74[环境科学与工程—环境工程]