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| Discussion on Behavior of Platinum Group Metals in Pressure Cyanide Leaching |
| HUANG Kun; CHEN Jing |
| Institute of Precious Metals |
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Cite this article:
HUANG Kun; CHEN Jing. Discussion on Behavior of Platinum Group Metals in Pressure Cyanide Leaching. Acta Metall Sin, 2004, 40(3): 270-274 .
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Abstract Studies on behavior of platinum--group metals(PGMs) in pressure cyanide leaching indicate that the percent PGM extraction follows the order of Pd >Pt >Rh, while the chemical stability of PGM cyanide complexes at high temperature is RhPt > Pd. The leaching behavior of PGMs could be described by their chemical reaction activity of surface state, and is the synergetic influence of metal—bond strength and atomic--state stability. The high temperature stability of PGM cyanide complexes could be explained from the heavy platinum--group complexes having higher thermodynamic stability and kinetic inertia than light platinum--group complexes with same structure, and from the difference of chemical reaction activity of PGM cyanide complex ions.
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Received: 11 March 2003
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