Elucidation of precious metal-slag-refractory reaction and dissolution mechanism of palladium in slag for recovery of precious metals from industrial waste
- Title
- Elucidation of precious metal-slag-refractory reaction and dissolution mechanism of palladium in slag for recovery of precious metals from industrial waste
- Other Titles
- N/A
- Author
- 김령래
- Alternative Author(s)
- Kim Ryoung Rae
- Advisor(s)
- 박주현
- Issue Date
- 2024. 2
- Publisher
- 한양대학교 대학원
- Degree
- Master
- Abstract
- To establish the dissolution mechanism of palladium (Pd) in the FetO-SiO2-CaO- Al2O3-
MgOsat slag system, the Pd solubility was measured at a temperature of 1873 K and partial
oxygen pressure ranging from = 1.0 × 10 to = 1.0 × 10 atm. In
the current slag system, the Pd solubility increases with increasing CaO and FeO content,
while it decreases with increasing SiO2 and Al2O3 content. This solubility behavior is
quantified by the modified Vee ratio, defined as ((CaO + FeO) / (SiO2 + Al2O3)), which
increases as the theoretical optical basicity and the activity of CaO increase.
Thermodynamic analysis reveals that Pd stabilizes in the form of
complex ion.
Based on this, the mechanism of Pd dissolution in the current slag system is proposed as
follows :
() +
1
4
() +
3
2
( ) = (
)
Combining the results from this experiment and previous findings suggests that a welldesigned
slag system can effectively minimize Pd loss during the pyrometallurgical
processing of industrial wastes containing Pd. By adjusting the ratio of basic oxides, such
as CaO and FeO, which promote Pd solubility in the slag, along with SiO2, which increases
viscosity, it is possible to achieve optimal conditions. Therefore, we recommend
implementing such an optimized slag system for the pyrometallurgical treatment of Pdcontaining
industrial wastes, ensuring minimal Pd loss and maximizing resource recovery.
- URI
- http://hanyang.dcollection.net/common/orgView/200000723152https://repository.hanyang.ac.kr/handle/20.500.11754/188261
- Appears in Collections:
- GRADUATE SCHOOL[S](대학원) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Theses(Master)
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