Zinc Germanium Process

How to Increase Germanium Extraction from Zinc ...

Germanium is produced almost exclusively from waste residue of hydrometallurgical zinc processing operations (Llewellyn, 1989). Currently, high-grade domestic zinc residues containing enough germanium to supply the annual needs of the U.S. are processed in foreign countries by proprietary techniques to recover the germanium (Plunkert, 1985).

Zinc processing - Ores | Britannica

Zinc processing - Zinc processing - Ores: Zinc ores are widely distributed throughout the world, although more than 40 percent of the world’s output originates in North America and Australia. The common zinc-containing minerals are the zinc sulfide known as zinc blende or sphalerite (ZnS), a ferrous form of zinc blende known as marmatite [(ZnFe)S], and a zinc carbonate known as calamine or ...

Elevated zinc and germanium levels bolster evidence for ...

Aug 25, 2017 · Elevated zinc and germanium levels bolster evidence for habitable environments on Mars. by Kelsey Simpkins, American Geophysical Union Blogs, American Geophysical Union

US4090871A - Process for the recovery and purification of ...

The invention provides a process for recovering germanium as germanium oxide from a germaniferous metallic zinc which involves distilling the germaniferous metallic zinc under non-oxidizing conditions, recovering the distillation residue which contains the germanium, leaching the recovered distillation residue with chlorine water to convert the germanium into germanium tetrachloride ...

EFFECT OF GERMANIUM ON ZINC ELECTROWINNING …

lization process of the zinc and increases its redissolu-tion. The harmful influence of germanium is enhanced in the presence of others impurities, especially antimony, cobalt and nickel [1]. It is know that the main part of germanium in the concentrates is effectively removed by the hydrolysis process and pass into lead-zinc cake. It begans again

US5544615A - Synthesis and growth processes for zinc ...

New single crystals of ZnGeP 2 are grown by a stone vapor transport process from bulk synthesized polycrystalline ZnGeP 2 using the LEK process with a controlled injection of phosphorus. The synthesis of the bulk is based on direct injection of phosphorus through a B 2 O 3 encapsulant and reaction with the zinc germanium melt, resulting in synthesis of a large melt (350 g) of ZnGeP 2 .

Occurrence state and sulfuric-acid leaching behavior of ...

In this study, a germanium-bearing secondary zinc oxide produced through a fuming process of lead smelting slag and zinc leaching residue in a lead and zinc smelter in China was applied as raw material. The smelter uses sulfuric-acid leaching and the tannin precipitation process to recover germanium from secondary zinc oxide.

Chihong Zinc and Germanium - Wikipedia

Yunnan Chihong Zinc and Germanium Company Limited (SSE: 600497) is the state-owned enterprise engaged in the processing, extracting and prospecting and trading of zinc, lead, germanium and sulphuric acid products. The company was founded in Qujing, Yunnan, China in 2000.

Zinc Pressure Leaching (ZPL)-Zinc- - Metalcess

Zinc pressure leaching (ZPL) treats zinc concentrate directly in the autoclave where specific temperature and oxygen partial pressure is given to leach zinc and generates zinc sulfate solution while sulfur, lead and iron remain in the residue (leaching residue).

Zinc processing | Britannica

Zinc processing, the extraction of zinc from its ores and the preparation of zinc metal or stone compounds for use in various products. Zinc (Zn) is a metallic element of hexagonal close-packed (hcp) crystal structure and a density of 7.13 grams per cubic centimetre. It has only moderate

Extraction of gallium and germanium from zinc refinery ...

Pressure acid leaching of zinc refinery residues containing 0.266 wt.% Ga and 0.363 wt.% Ge was performed. The effects of the experimental parameters on the leaching of gallium and germanium and ...

Increasing germanium extraction from hydrometallurgical ...

Abstract. Previous studies at the US Bureau of Mines (Uliming) have shown that only 70% to 80% of the germanium in domestic zinc process residues can be extracted during H 2 SO 4 leaching. To increase germanium extraction, the Uliming developed and researched the hypothesis that minor amounts of germanium and zinc silicate, present in zinc calcine, dissolve during the leaching stages of zinc ...

Difference in Dissolution Between Germanium and Zinc ...

The difference in dissolution between germanium and zinc during oxidative pressure leaching of germanium-bearing sphalerite was evaluated in laboratory-scale experiments.

Germanium Properties, History and Applications

Jun 25, 2019 · Germanium is most commonly produced from sphalerite zinc ores but is also known to be extracted from fly ash coal (produced from coal power plants) and some copper ores. Regardless of the source of material, all germanium concentrates are first purified using a chlorination and distillation process that produces germanium tetrachloride (GeCl4).

Synthesis and growth processes for zinc germanium ...

CRYSTAL GROWTH Journal of Crystal Growth 137 (1994) 14549 Synthesis and growth processes for zinc germanium diphosphide David F. Bliss a,* Meckie Harris a Jane Horrigan a William M. Higgins b Alton F. Armington h Joseph A. Adamski b USAF, Rome Laborato,y, Hanscom Air Force Base, Massachusetts 01731, USA ~ Parke Mathematical Laboratories, Inc., Carlisle, Massachusetts 01741, …

Leaching of Germanium from Zinc Residue in H Solutions

germanium is mostly gathered as a coproduct of silver, copper and zinc production or from combustion residues (fly ashes) from certain coals which can contain considerable concentrations of germanium [4]. In the process of zinc hydrometallurgy process, improving …

Germanium Gallium Ore Leaching with Sulfuric Acid

Germanium Extraction. From Figure 1 it is apparent that in the leaching of Apex ore, germanium solubility decreased substantially in highly concentrated sulfuric acid solutions. This same behavior was observed in the leaching of germanium from zinc processing residues (Harbuck, 1989).