TY - JOUR
T1 - Recovery of valuable metals from jarosite by sulphuric acid roasting using microwave and water leaching
AU - Liu, C.
AU - Ju, S. H.
AU - Zhang, L. B.
AU - Srinivasakannan, C.
AU - Peng, J. H.
AU - Le, T. Q.X.
AU - Guo, Z. Y.
N1 - Funding Information:
The authors wish to thank the National Natural Science Foundation of China [grant numbers U1302271 and 51264022].
Publisher Copyright:
© 2016 Canadian Institute of Mining, Metallurgy and Petroleum.
PY - 2017/1/2
Y1 - 2017/1/2
N2 - In this paper, jarosite residue (JR) blended with concentrated H2SO4 was subjected to a process comprising microwave roasting and water leaching. The effects of H2SO4/JR weight ratio, microwave roasting temperature and time, water leaching conditions on the recovery of Fe, Zn, In, Cu, Cd, Ag and Pb were investigated utilising a series of experiments. Based on energy conservation and environmental protection, optimum conditions for metals recovery from JR were determined as: H2SO4/JR weight ratio = 0.36, microwave roasting temperature, 250°C; roasting time, 30 min; leaching temperature, 50°C; leaching time, 1 h; and liquid–solid ratio, 4:1 (mL/g), thus, the extraction of Fe, Zn, In, Cu, Ag and Cd were 89.4, 80.7, 85.1, 90.7, 61.3 and 48.8% respectively, while the Pb was concentrated in the final residue. Scanning electron microscope-energy dispersive spectrometer (SEM-EDS) patterns were used to characterise and analyse the transformation of valuable metals in the residue after roasting and leaching.
AB - In this paper, jarosite residue (JR) blended with concentrated H2SO4 was subjected to a process comprising microwave roasting and water leaching. The effects of H2SO4/JR weight ratio, microwave roasting temperature and time, water leaching conditions on the recovery of Fe, Zn, In, Cu, Cd, Ag and Pb were investigated utilising a series of experiments. Based on energy conservation and environmental protection, optimum conditions for metals recovery from JR were determined as: H2SO4/JR weight ratio = 0.36, microwave roasting temperature, 250°C; roasting time, 30 min; leaching temperature, 50°C; leaching time, 1 h; and liquid–solid ratio, 4:1 (mL/g), thus, the extraction of Fe, Zn, In, Cu, Ag and Cd were 89.4, 80.7, 85.1, 90.7, 61.3 and 48.8% respectively, while the Pb was concentrated in the final residue. Scanning electron microscope-energy dispersive spectrometer (SEM-EDS) patterns were used to characterise and analyse the transformation of valuable metals in the residue after roasting and leaching.
KW - Jarosite residue
KW - Microwave
KW - Sulphuric acid roasting
KW - Valuable metals
UR - https://www.scopus.com/pages/publications/84991576419
U2 - 10.1080/00084433.2016.1242972
DO - 10.1080/00084433.2016.1242972
M3 - Article
AN - SCOPUS:84991576419
SN - 0008-4433
VL - 56
SP - 1
EP - 9
JO - Canadian Metallurgical Quarterly
JF - Canadian Metallurgical Quarterly
IS - 1
ER -