典型文献
Process and kinetics of the selective extraction of cobalt from high-silicon low-grade cobalt ores using ammonia leaching
文献摘要：
An ammonia-based system was used to selectively leach cobalt (Co) from an African high-silicon low-grade Co ore, and the other elemental impurities were inhibited from leaching in this process. This process was simple and environmentally friendly. The results revealed that the leaching ratio of Co can reach up to 95.61％ using (NH4)2SO4 as a leaching agent under the following materials and conditions:(NH4)2SO4 concentration 300 g/L, reductant dosage 0.7 g, leaching temperature 353 K, reaction time 4 h, and liquid–solid ratio 6 mL/g. The leaching kinetics of Co showed that the apparent activation energy of Co leaching was 76.07 kJ/mol (i.e., in the range of 40–300 kJ/mol). This indicated that the leaching of Co from the Co ore was controlled by an interfacial chemical reaction, and then the developed leaching kineticsmodel of the Co can be expressed as1?(1?α)1/3=28.01×103×r?10 ×C(1N.5H4)2SO4×exp(?76073/8.314T)×t, where α is the leaching ratio (％) ofCo, r0 is the average radius (m) of the Co ore particles, T is the temperature (K), and C(NH4)2SO4is the initial reactant concentration (kg/m3).
文献关键词：
中图分类号：
作者姓名：
Lei Tian;Ao Gong;Xuangao Wu;Xiaoqiang Yu;Zhifeng Xu;Lijie Chen
作者机构：
Institute of Green Metallurgy and Process Intensification,Jiangxi University of Science and Technology,Ganzhou 341000,China
文献出处：
引用格式：
[1]Lei Tian;Ao Gong;Xuangao Wu;Xiaoqiang Yu;Zhifeng Xu;Lijie Chen-.Process and kinetics of the selective extraction of cobalt from high-silicon low-grade cobalt ores using ammonia leaching)[J].矿物冶金与材料学报,2022(02):218-227
A类：
kineticsmodel,as1,5H4,314T,ofCo,2SO4is
B类：
Process,extraction,cobalt,from,high,silicon,grade,ores,using,ammonia,leaching,An,system,was,used,selectively,African,other,elemental,impurities,were,inhibited,this,process,This,simple,environmentally,friendly,results,revealed,that,reach,up,NH4,agent,under,following,materials,conditions,concentration,reductant,dosage,temperature,reaction,liquid,solid,showed,apparent,activation,energy,kJ,range,indicated,controlled,by,interfacial,chemical,then,developed,be,expressed,1N,where,r0,average,radius,particles,initial,reactant
AB值：
0.419929
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