germanium fly extraction

Germanium Fly Extraction

Recovery of germanium from leach solutions of fly ash ...

The solvent extraction of germanium and some heavy metals by commercial tri-octyl/decyl amine (Alamine 336), N-methyl-N, N-dioctyl chloride (Aliquat 336) and phosphine oxide (Cyanex 923) has been studied.In each extraction system, germanium was only extracted from a solution containing nickel, cadmium, cobalt, and zinc, which had a composition similar to gasification coal fly ash aqueous leach ...

Germanium and Gallium Extraction from Gasification Fly Ash ...

extraction yields obtained i n these early extraction tests, the research was currently directed towards the optimisation of the extraction procedure by investigating the extraction (simultaneous if possible) of both elements to obtain high extraction yields regardless of the fly ash and operational conditions of the IGCC plant . A number of

Recovery of Germanium from Coal Fly Ash Leachate by ...

germanium recovery process from f ly ashes, culminating in a commercial Ge end-product. The research on the extraction of germanium with water from the Puertollano IGCC fly ash 16 revealed that relatively high extraction yields (up to 86%) were obtained using pure water. These promising r esults conducted research towards the study of ...

Recovery of germanium from real fly ash leachates by ion ...

Germanium recovery from real fly ash (FA) leachates was studied using ion-exchange procedures. The procedure was based on germanium complexation with catechol (CAT) in an aqueous solution followed by the retention of the Ge–CAT complex onto a conventional strongly basic anionic resin (IRA-900).

Germanium - Wikipedia

Germanium is a stone element with the symbol Ge and atomic number 32. It is a lustrous, hard-brittle, grayish-white metalloid in the carbon group, chemically similar to its group neighbours silicon and tin.Pure germanium is a semiconductor with an appearance similar to elemental silicon. Like silicon, germanium naturally reacts and forms complexes with oxygen in nature.

germanium extraction from the coal fly ash by Arman ...

Germanium is a semiconductor, hard, and crystalline element. Germanium is found in the earths crust in an abundance of 1-7 ppm and concentrated in very few minerals such as argyrodite, germanite, or renierite. Some Ag, Sn, Cu, Fe, and especially Zn ores, contain germanium and

Ge extraction from gasification fly ash | Request PDF

The process is based on hydrometallurgical operations: firstly a germanium extraction from fly ash by leaching and a consequent Ge separation from the other elements present in the solution by ...

Hydrometallurgical Recovery of Germanium from Coal ...

This article is concerned with a simple hydrometallurgical method for the selective recovery of germanium from fly ash (FA) generated in an integrated gasification with combined cycle (IGCC) process. The method is based on the leaching of FA with water and a subsequent concentration and selective separation of germanium by a solvent method.

Hydrometallurgical recovery of germanium from coal ...

In this article, a hydrometallurgical method for the selective recovery of germanium from fly ash (FA) has been tested at pilot plant scale. The pilot plant flowsheet comprised a first stage of water leaching of FA, and a subsequent selective recovery of the germanium from the leachate by solvent extraction method.

Germanium: Current and Novel Recovery Processes | IntechOpen

Germanium (Ge) is considered a critical element due to its many industrial applications; Ge is a metalloid used in solar cells, fiber optics, metallurgy, chemotherapy, and polymerization catalysis. The main sources of Ge are sulfides ores of Zn, Pb, and Cu, coal deposits, as well as by-products and residues from the processing of these ores and coals (e.g., smelting flue dust and coal fly ashes).

Commercial Recovery of Metals From Coal Fly Ash ...

Vanadium and silver extraction from enriched coal sources dates back to the 1800s, and germanium extraction is still active by companies such as Umicore. 1. When coal is combusted, some valuable components can be found in the fly ash captured by the electrostatic precipitators and/or fabric filters commonly applied at coal-fired power plants.

Non-dispersive selective extraction of germanium from fly ...

Non-dispersive selective extraction of germanium from fly ash leachates using membrane-based processes Article in Separation Science and Technology · …

Germanium separation and purification by leaching and ...

Sep 30, 2016 · In this research work, extraction and purification of germanium from zinc leach residues (ZLR) were investigated. The results of ICP, XRF, and atomic adsorption spectroscopy (AAS) tests show that contents of germanium, iron, lead, and zinc within the leaching residue were 105×10 −6, 3.53%, 10.35%, and 8.8%

Minerals | Free Full-Text | Demonstration Plant Equipment ...

Germanium recovery from coal fly ash by hydrometallurgical procedures was studied at the pilot scale (5 kg of fly ash/h). Results were used to design the equipment of a demonstration-sized plant (200 kg of fly ash/h). The process is based on hydrometallurgical operations: firstly a germanium extraction from fly ash by leaching and a consequent Ge separation from the other elements present in ...

Vanadium recovery from oil fly ash by leaching ...

In this article, a hydrometallurgical method for the selective recovery of germanium from fly ash (FA) has been tested at pilot plant scale. The pilot plant flowsheet comprised a first stage of water leaching of FA, and a subsequent selective recovery of the germanium from the leachate by solvent extraction method.

[PDF] Demonstration Plant Equipment Design and Scale-Up ...

Germanium recovery from coal fly ash by hydrometallurgical procedures was studied at the pilot scale (5 kg of fly ash/h). Results were used to design the equipment of a demonstration-sized plant (200 kg of fly ash/h). The process is based on hydrometallurgical operations: firstly a germanium extraction from fly ash by leaching and a consequent Ge separation from the other elements present in ...

Business Chemistry | PhytoGerm: Extraction of germanium ...

Thus far, the relatively high running costs of the germanium solvent extraction from fly ash remain the key obstacle implementing the described process route. In this paper, the two extraction approaches introduced by the PhytoGerm project and by Arroyo et al. (2011) have been investigated.

Process for the recovery of gallium and germanium from ...

Report of Investigations 6940 of the United States Department of the Interior, Bureau of Mines, entitled "Extraction of Germanium and Gallium from Coal Fly Ash and Phosphorous Furnace Flue Dust" by R. F. Waters and H. Kenworthy (1967) describes the efforts of …

Mathematical modeling on non-dispersive extraction of ...

Dec 29, 2018 · Lead–zinc–silver and copper ores, as well as coal fly ashes, are the main resources of germanium (Yellishetty et al. 2017). Due to the rare mined resources of germanium, the efficient recovery of germanium in metallurgical processes is currently important (Kamran Haghighi et al. 2018b, 2019).

Extraction of germanium and gallium from coal fly ash and ...

Get this from a library! Extraction of germanium and gallium from coal fly ash and phosphorus furnace flue dust. [Roy F Waters; Heine Kenworthy; United States. Bureau of Mines,]

Last Article: Gypsum Mining Companies In Kenya   Next Article: Mobile Used Concrete Crushers For Sale

Related articles:

2006-2020 © All rights reserved
Add: New Technical Industry Development Area, Zhengzhou, Henan, China. Postcode: 450001
E-mail: [email protected]