【摘 要】
：
In this paper,the kinetics of pressure leaching for purification of metallurgical grade silicon with hydrochloric acid was mvestigated.The effects of particle s
【机 构】
：
National Engineering Laboratory for Vacuum Metallurgy,Technology Center of Yunnan Metallurgy Group C
【基金项目】
：
the Program for New Century Excellent Talents of Ministry of Education of China;国家自然科学基金
论文部分内容阅读
In this paper,the kinetics of pressure leaching for purification of metallurgical grade silicon with hydrochloric acid was mvestigated.The effects of particle size,temperature,total pressure,and concentration of hydrochloric acid on the kinetics and mechanism of iron removal were studied.It was found that the reaction kinetic model followed the shrinking core model,and the apparent activation energy of the leaching reaction was 46.908 kJ/mol.And the apparent reaction order of iron removal with pressure leaching was 0.899.The kinetic equation was obtained and the mathematical model of iron removal from metallurgical grade silicon (MG-Si) was given as follows:1 - 2x- (1 - x)2/3 =exp(5.1654- 4811.459 1-T + 1.287 ln p + 1.046ln [C])· t/r02.The values calculated from the equation were consistent with the experimental results.
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