CN103468977A - Method for selectively leaching germanium ...

The invention relates to a method for selectively leaching germanium and gallium from complex smelting slag with the germanium and the gallium or ore with the germanium and the gallium, and belongs to the field of non-ferrous metal hydrometallurgy and secondary-resource recycling. The method for selectively leaching the germanium and the gallium from the complex smelting slag with the ...

Review on resources and recycling of germanium, with ...

Abstract Germanium is indispensable for various applications, especially in infrared optics, and has been designated as a strategic resource. However, independent germanium deposits are rare, and the total recovery efficiency for germanium is low. Hence, complete and rational utilization of existing germanium resources, including primary and secondary resources, is an extremely urgent ...

CONCENTRATION OF GERMANIUM IN THE ASH OF …

Germanium content in the ash of woody coals and fusains ..... 8 4. Germanium content in the ash of different gravity fractions of Lower Kittanning coals ... commercial extraction of the element from coal ash. In 1935, the senior author of this report submitted 19 …

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

Non-dispersive selective extraction of Ge(IV) tartrates was carried out from simulated fly ash solutions containing heavy metals through supported liquid membranes (SLM). The optimum transport was obtained using a PTFE membrane containing Alamine 336 5%v/v in the condition of tartaric acid 2.76 mmol/L and HCl 1 mol/L in feed and strip phases ...

WO2011134402A1 - Method for extracting gallium from fly ...

Disclosed is a method for extracting gallium from fly ash, which comprises the following steps: crushing the fly ash and removing Fe by magnetic separation; then dissolving it by using hydrochloric acid to obtain hydrochloric acid leachate; adsorbing gallium in the hydrochloric acid leachate with macroporous cation resin, followed by eluting to obtain the eluent containing gallium; adding ...

C22B 58 - Obtaining gallium or indium - Patents Sitemap

CN102787242B Method for recovering germanium and indium from germanium-containing material generated from lead and zinc smelting process 12/10/2013 US8603216 Extraction …

Extraction and Flameless AAS Determination of Germanium in ...

(1985). Extraction and Flameless AAS Determination of Germanium in Lignite Fly Ash. Analytical Letters: Vol. 18, No. 19, pp. 2467-2475.

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

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 solutions.

Hydrometallurgical Recovery of Germanium from Coal ...

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 ...

Characterization and treatment of wastewater produced ...

The present work dealt with the characterization and treatment of liquid wastes produced during the hydrometallurgical recovery of germanium (Ge) from fly ash. The main metals causing reasons for environmental concern were arsenic (As), nickel (Ni) and antimony (Sb).

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 () in an aqueous solution followed by the retention of the Ge– complex onto a conventional strongly basic anionic resin (IRA-900). A centred composite rotatable design (CCRD) with two factors was employed for experimental design ...

Mineralogy Characteristic Study and Exploration on the ...

The separation and enrichment can be targeted to enrich in fly ash and reduce the cost of leaching and recovering of fly ash. Regarding their different properties, the single-component separation was used to obtain uncompleted burned carbon, glass microbeads, minerals, and other characteristic components from the ash. Also, the mineral composition of each component was analyzed by electron ...

The Health Benefits of Germanium - Janet Starr Hull PhD, CN

Germanium has been used to treat depression, arthritis, vision problems, elevated blood pressure, heavy metal poisoning, and cancer. Germanium ores are rare. Germanium is a hard, grayish-white element that has a metallic luster and the same crystal structure as diamond. In addition, germanium is a semiconductor, with electrical properties ...

a, Mehdi Irannajad *a, Agustin Fortuny b, Ana Maria Sastre ...

ACCEPTED MANUSCRIPT Recovery of germanium from leach solutions of fly ash using solvent extraction with various extractants Hossein Kamran Haghighi a, Mehdi Irannajad *a, Agustin Fortuny b, Ana Maria Sastre c a Department of Mining and Metallurgical Engineering, Amirkabir University of Technology, Tehran, Iran.

germanium extraction from the coal fly ash by Arman …

Monday, December 7, 2015 Germanium in the coal fly ash In recent years its practiced a new way of producing germanium Methods of Germanium extraction Germanium is a semiconductor, hard, and crystalline element. Germanium is found in the earth's crust in an abundance of 1-7 ppm

Extraction Of Germanium And Gallium From Coal Fly Ash And ...

Download Extraction Of Germanium And Gallium From Coal Fly Ash And Phosphorus Furnace Flue Dust Book For Free in PDF, EPUB. In order to read online Extraction Of Germanium And Gallium From Coal Fly Ash And Phosphorus Furnace Flue Dust textbook, you need to create a FREE account. Read as many books as you like (Personal use) and Join Over 150.000 Happy Readers.

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.

Recovery of metals and other beneficial products from …

12%Fass R et al. (1994). Bioleaching method for the extraction of metals from coal fly ash using thiobacillus. US Patent No. 5278069. Font O, Querol X, Lopez-Soler A, Chimenos JM, Fernandez AI, Burgos S, Garcia PF (2005) Germanium extraction from gasification fly ash. Fuel 84:1384–1392. Article Google Scholar

Minerals 2015 OPEN ACCESS minerals

operations: firstly a germanium extraction from fly ash by leaching and a consequent Ge separation from the other elements present in the solution by solvent extraction procedures. Based on the experimental results, mass balan ces and McCabe-Thiele di agrams were applied to determine the number of step s of the solvent extraction stag e.

Mathematical modeling on non-dispersive extraction of ...

Germanium is recognized as an important metalloid used in high-technology applications. One of the recent usages is as arrays in X-ray fluorescence microscopy (Agyeman-Budu et al. 2016).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 ...

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. The solvent extraction method ...

Commercial Recovery of Metals from Coal Fly Ash - MMTA

Commercial metal extraction from coals is not a new idea, with vanadium and silver extraction dating back to the 1800s, and germanium extraction still active. However, more recently there has been increasing interest in other metals from residue coal ashes, as concerns have grown over the overall management of fly ash, as well as environmental ...

Using Ion-Exchange to Recovery of Germanium from Waste ...

Germanium is the raw metal of the optical fibers which become more important with the rapid development of optical communication in recent years. Owing to the importance of germanium and the problematic of waste optical fibers, we using the hydrometallurgical process to recovery germanium in …

Demonstration Plant Equipment Design and Scale-Up from ...

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 the solution by solvent extraction procedures.

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 () in an aqueous solution followed by the retention of the Ge– complex onto a …

Global Substance Flow Analysis of Gallium, Germanium, and ...

Summary This study provides a global substance flow analysis for gallium (Ga), germanium (Ge), and indium (In) for 2011, quantifying the amount of metal lost during extraction, beneficiation/smelti...

Characterization and treatment of wastewater produced ...

Characterization and treatment of wastewater produced during the hydro-metallurgical extraction of germanium from fly ash Notice. The full text article is not available. The article you have requested is supplied via the British Library and is not available for immediate download.

minerals-05-00298.pdf - Minerals 2015 5 298-313 doi:10 ...

Tests were performed and results are shown in Table 2. A larger amount of raffinate in the leaching solution increased the germanium content in leachate, but if the pH of the leaching solution is very low, the puzzolanity of the fly ash can change, avoiding its reutilization after germanium extraction in many of their current applications [4,21 ...

Improve subsequent leaching efficiency and extraction rate ...

Germanium is an important and rare material which widely used in fibre optic industry, accounting for about 40% of the total germanium product usage. Due to the rarity of germanium, developing an effective recycling process of recovering germanium metal from waste fibre optical cables is significant.

(PDF) Recovery of germanium from leach solutions of fly ...

Under a comparable Cyanex 923 condition, the germanium extraction efficiency by the aforementioned extractants was in the order Aliquat Fly ashes 336 > Alamine 336 > Cyanex 923. The slope analysis method showed that 2 moles of Alamine 336 and Aliquat 336, as well as 4 moles of Cyanex 923, participated in the extraction of germanium.

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 ...

Extraction Of Germanium And Gallium From Coal Fly Ash And ...

Extraction Of Germanium And Gallium From Coal Fly Ash And Phosphorus Furnace Flue Dust. Download and Read online Extraction Of Germanium And Gallium From Coal Fly Ash And Phosphorus Furnace Flue Dust ebooks in PDF, epub, Tuebl Mobi, Kindle Book. Get Free Extraction Of Germanium And Gallium From Coal Fly Ash And Phosphorus Furnace Flue Dust Textbook and unlimited access …

Germanium Data Sheet - Mineral Commodity Summaries 2020

GERMANIUM (Data in kilograms of germanium content unless otherwise noted) Domestic Production and Use: In 2019, zinc concentrates containing germanium were produced at mines in Alaska, Tennessee, and Washington. Germanium-containing concentrates in Alaska and Washington were exported to a refinery in Canada for processing and germanium recovery.

Spectrophotometric quantification of germanium (IV) in ...

Torralvo FA, Fernández-Pereira C. Recovery of germanium from real fly ash leachates by ion-exchange extraction. Minerals Eng. 2011;24(1):35-41. Mahmudov KT, Aliyeva RA, Hamidov SZ, et al. Preconcentration of germanium (IV) on styrene-maleic anhydride copolymer modified with aminobenzoic acids and its spectrophotometric determination with bis(2 ...

Characterization and treatment of wastewater produced ...

Hydrometallurgical extraction (1) The present work dealt with the characterization and treatment of liquid wastes produced during the hydrometallurgical recovery of germanium (Ge) from fly ash. The main metals causing reasons for environmental concern were arsenic (As), nickel (Ni) and... yielded a 97.5% removal of metals.