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旋转圆盘法研究锌片置换除钴的影响因素 被引量:5
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作者 郭忠诚 杨显万 《有色金属》 CSCD 2000年第3期48-51,共4页
研究了锌离子、搅拌速度、溶液pH以及温度等对锌片置换除钴的影响因素.结果表明,锌离子对锌粉净化除钻影响较大,当硫酸钴溶液中不含锌离子时,锌粉置换除钻较易进行;相反,当硫酸钴溶液中含锌离子时,锌粉置换除钻较难进行。当硫... 研究了锌离子、搅拌速度、溶液pH以及温度等对锌片置换除钴的影响因素.结果表明,锌离子对锌粉净化除钻影响较大,当硫酸钴溶液中不含锌离子时,锌粉置换除钻较易进行;相反,当硫酸钴溶液中含锌离子时,锌粉置换除钻较难进行。当硫酸锌溶液温度低于75℃时.锌片置换除钴的速率较低;随溶液 pH值的降低,除钴效率升高,但如果溶液pH值太低,锌粉耗量太大,导致生产成本增加。故在工业生产中,溶液pH值应保持在3.8~4.5之间。 展开更多
关键词 旋转圆盘法 硫酸锌溶液 除钴 炼锌
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Theoretical investigation of micropolar fluid flow between two porous disks 被引量:6
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作者 P.Valipour S.E.Ghasemi M.Vatani 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第7期2825-2832,共8页
The steady, laminar, incompressible and two dimensional micropolar flow between two porous disks was investigated using optimal homotopy asymptotic method(OHAM) and fourth order Runge–Kutta numerical method. Comparis... The steady, laminar, incompressible and two dimensional micropolar flow between two porous disks was investigated using optimal homotopy asymptotic method(OHAM) and fourth order Runge–Kutta numerical method. Comparison between OHAM and numerical method shows that OHAM is an exact and high efficient method for solving these kinds of problems. The results are presented to study the velocity and rotation profiles for different physical parameters such as Reynolds number, vortex viscosity parameter, spin gradient viscosity and microinertia density parameter. As an important outcome, the magnitude of the microrotation increases with an increase in the values of injection velocity while it decreases by increasing the values of suction velocity. 展开更多
关键词 theoretical investigation porous disks micropolar fluid flow optimal homotopy asymptotic method(OHAM) microrotation
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