Recovery of germanium and other valuable metals from zinc plant residues

Date

2008-06-01

Author

Kul, A.
Topkaya, Yavuz Ali

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

255
views

0
downloads

The main purpose of this study was to characterize and to extract germanium from the copper cake of Cinkur Zinc Plant. The physical, chemical and mineralogical characterization of the ground copper cake sample obtained from Cinkur showed that it was 84% below 147 pin containing 700 ppm germanium. The copper cake also contained 15.33% Cu, 15.63% Zn, 1.66% Cd, 1.33% Ni, 0.64% Co, 0.35% Fe, 2.62% Pb, 12.6% As, 0.18% Sb and 3.42% SiO2. The mineralogical analysis indicated the complex nature of the copper cake which was mainly composed of metallic and oxidized phases containing copper, arsenic, zinc, cadmium, etc. The sulfuric acid leaching experiments were performed under the laboratory conditions. The optimum collective extraction of germanium and other valuable metals was obtained at a temperature range 60 to 85 degrees C for a leaching duration of 1 h with sulfuric acid concentration of 150 gpl and using a solid-liquid ratio 1/8 g/cc. Under these conditions, the recovery of germanium was 92.7% while the other metals were leached almost completely. The optimum selective leaching conditions of germanium was determined as half an hour leach duration, 1/8 g/cc solid-liquid ratio, 100 gpl sulfuric acid concentration and a temperature range 40 to 60 degrees C. Under these conditions the leach recovery of germanium was 78%. The dissolution's of other metals like cobalt, nickel, iron, copper, cadmium and arsenic were almost low. So, germanium would be separated more selectively at the following precipitation by tannin stage.

Subject Keywords

Industrial and Manufacturing Engineering, Materials Chemistry, Metals and Alloys

URI

https://hdl.handle.net/11511/44648

Journal

HYDROMETALLURGY

DOI

https://doi.org/10.1016/j.hydromet.2007.11.004

Collections

Department of Metallurgical and Materials Engineering, Article

Suggestions

OpenMETU
Core

Pressure acid leaching of Caldag lateritic nickel ore: An alternative to heap leaching Onal, Mehmet Ali Recai; Topkaya, Yavuz Ali (Elsevier BV, 2014-02-01) In this study, the leachability of Caldag lateritic nickel ore under high pressure acid leaching (HPAL) conditions was investigated. Several HPAL parameters were tested in a comparative manner since in many cases, the extraction efficiencies of Caldag ore sample were more than 90% for nickel and cobalt. After the optimization of the process parameters, it was found that 94.1% nickel and 94.0% cobalt could be extracted under the conditions of 325 kg sulfuric acid/tonne of dry ore, 250 degrees C leaching temp...
Reaction chemistry of gold leaching in thiourea solution for a Turkish gold ore Orgul, S; Atalay, U (Elsevier BV, 2002-12-01) This study was carried out on a finely disseminated gold-bearing ore from Kaymaz, Turkey. The main objective was to determine the mechanism of reaction between thiourea and Fe 31 in the thiourea leaching of gold. Thiourea consumption levels were also examined during the leaching operations for different leaching parameters, i.e., molar ratio of ferric sulfate/thiourea, pH, and temperature. The leaching using the thiourea process was compared with cyanidation. In optimum leach conditions, 85.8% gold extracti...
Removal of Crystal Violet and Eriochrome Black T Dyes from Aqueous Solutions by Magnetic Nanoparticles Biosynthesized from Leaf Extract of Fraxinus Chinensis Roxb Ali, Imran; Peng, Changsheng; Khan, Zahid M.; Sultan, Muhammad; Naz, Iffat; Ali, Mohsin; Farid, Hafiz U.; Mahmood, Muhammad H.; Ahsen, Rameez (HARD Publishing Company, 2019-01-01) In the present research, a "green" recipe was used to produce innovative phytogenic magnetic nanoparticles (PMNPs) from leaf extract of Fraxinus chinensis Roxb without employing any additional toxic surfactants as capping agents. The convenient reaction between metal salt solution and plant biomolecules occurred within a few minutes by color changes from pale green to intense black, hinting at the production of magnetic nanoparticles (MNPs). The formation of PMNPs was verified by employing different techniq...
Processing of porous TiNi alloys using magnesium as space holder Aydogmus, Tarik; Bor, Sakir (Elsevier BV, 2009-06-10) Slightly Ni-rich, chemically homogeneous porous TiNi alloys having porosities in the range 59-81% have been produced using magnesium powder as pore forming agent. TiNi in the form of austenite, apart from a small amount of martensite, was the only phase present in the product. The processed alloys exhibited interconnected open pores spherical in shape and with an average pore size around 400 mu m. Elastic modulus values observed to extend from 0.5 to 9 GPa depending on porosity content were comparable to th...
Recovery of copper from oxide copper ore by flotation and leaching Kiraz, Emirhan; Atalay, Mustafa Ümit; Department of Mining Engineering (2014) The aim of this study was the recovery of copper from the oxide copper ore by froth flotation and agitating sulphuric acid (H2SO4) leaching. The ore with 4.21% copper grade used in this study was obtained from Çorum-Dangaz region of Turkey. Native copper, cuprite (Cu2O), tenorite (CuO), and malachite (Cu2(OH)2/CO3) were the main copper minerals in the test sample. Quartz, calcite, illite, chlorite, and plagioclase were determined as the main gangue minerals of the sample. The mesh of grind size of copper mi...

Citation Formats

A. Kul and Y. A. Topkaya, “Recovery of germanium and other valuable metals from zinc plant residues,” HYDROMETALLURGY, pp. 87–94, 2008, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/44648.