Kinetics of Cerussite Leaching in Sulfamic Acid Solution

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Chuanfa Cui¹  Dandan Wu¹  Shuming Wen¹  Jiushuai Deng¹ 

[1] State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Faculty of Land Resource Engineering, Kunming University of Science and Technology

关键词: Kinetics;    Leaching;    Cerussite;    Sulfamic Acid;   

DOI  :  10.1252/jcej.14we316

来源: Maruzen Company Ltd

【 摘 要 】

References(19)The leaching of cerussite kinetic was investigated using sulfamic acid solution as lixiviant. Results showed that 30 min was the optimum time to achieve over 95% lead extraction under the following leaching conditions: temperature of 60°C, stirring speed of 1,000 rpm, average particle size of 60 µm, and sulfamic acid concentration of 0.3 mol/L. The leaching process was controlled by the shrinking core model for surface chemical reaction. The leaching rate increased with increased reaction temperature, stirring speed, and concentration, as well as with decreased particle size. The apparent activation energy was 47.57 kJ/mol, and the reaction orders with respect to stirring speed, sulfamic acid concentration, and particle size were 1.683, 1.165, and −0.764, respectively. XRD and SEM analyses indicated that cerussite almost was completely dissolved and leaching residues included quartz. Therefore, sulfamic acid solution can be used as effective lixiviant for lead extraction from cerussite.

【 授权许可】

Unknown