Microwave assisted atmospheric acid leaching of nickel from laterite ore
来源期刊：Rare Metals2010年第3期
论文作者：CHE Xiaokuia,b,SU Xiuzhuc,CHI Ru’anc,and YU Junxiac a College of Resources and Civil Engineering,Northeastern University,Shenyang ,China b Division of Mineral Resources,Metallurgy & Materials,General Research Institute for Nonferrous Metals,Beijing ,China c Key Laboratory for Green Chemical Process of the Ministry of Education of China & Hubei Key Lab of Novel Reactor & Green Chemical Technology,Wuhan Institute of Technology,Wuhan ,China
文章页码：327 - 332
摘 要：The recovery of nickel from laterite ore with sulphuric acid under the effect of microwave irradiation was studied.The experimental results indicated that the extraction rate of nickel was influenced by reaction time,sulphuric acid concentration,and temperature,especially by microwave power.The results obtained from the experiments of orthogonal arrays showed that the optimum conditions of sulphuric acid concentration,reaction time,microwave power,and temperature were 25 vol.%,1.5 h,600 W,and 90°C,respectively.Under the optimal conditions,the nickel recovery could reach approximately 90.8%,which was higher than that obtained by conventional water bath heating.Kinetic experiments showed that the leaching of nickel in a sulphuric acid medium was controlled by chemical reaction occurring on the surface of laterite ore.The apparent activation energy was 38.9 kJ/mol.Microwave heating technology is efficient,clean,and easy to control and facilitate continuous processing of materials.
CHE Xiaokuia,b,SU Xiuzhuc,CHI Ru’anc,and YU Junxiac a College of Resources and Civil Engineering,Northeastern University,Shenyang 110004,China b Division of Mineral Resources,Metallurgy & Materials,General Research Institute for Nonferrous Metals,Beijing 100088,China c Key Laboratory for Green Chemical Process of the Ministry of Education of China & Hubei Key Lab of Novel Reactor & Green Chemical Technology,Wuhan Institute of Technology,Wuhan 430073,China
摘 要：The recovery of nickel from laterite ore with sulphuric acid under the effect of microwave irradiation was studied.The experimental results indicated that the extraction rate of nickel was influenced by reaction time,sulphuric acid concentration,and temperature,especially by microwave power.The results obtained from the experiments of orthogonal arrays showed that the optimum conditions of sulphuric acid concentration,reaction time,microwave power,and temperature were 25 vol.%,1.5 h,600 W,and 90°C,respectively.Under the optimal conditions,the nickel recovery could reach approximately 90.8%,which was higher than that obtained by conventional water bath heating.Kinetic experiments showed that the leaching of nickel in a sulphuric acid medium was controlled by chemical reaction occurring on the surface of laterite ore.The apparent activation energy was 38.9 kJ/mol.Microwave heating technology is efficient,clean,and easy to control and facilitate continuous processing of materials.
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