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  • Ion flotation of germanium from fly ash aqueous leachates ...

    The germanium – together with other metals and metalloids contained in the fly ash generated in the Integrated Gasification in Combined Cycle (IGCC) of Elcogas plant (Puertollano, Spain) – may be extracted by aqueous leaching. Here we report the study of the selective recovery of germanium from aqueous leachate by means of ion flotation, using a complexating agent and a surfactant as ...

  • Cited by: 73
  • Ion flotation of germanium from fly ash aqueous leachates ...

    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 ...

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

    Recovery of Germa nium from Coal Fly Ash Leachate by Precipitation . Fátima Arroyo a, Natividad Pérez Camacho a, Pilar Coca b and Constantino Fernández -Pereira a . a Escuela Superior de Ingenieros de Sevilla, Dpto. ingeniería Química y Ambiental, Camino de los De scubrimientos s/n , 41092 Seville (Spain) b ELCOGAS S .A., 13500 Puertollano, Ciudad R eal, Spain . KEYWORDS: germanium, fly ...

  • 文件大小: 568KB
  • Characterization and treatment of wastewater produced ...

    Desalination 230 (2008) 162–174 Characterization and treatment of wastewater produced during the hydro-metallurgical extraction of germanium from fly ash D. Kalderis, E. Tsolaki, C. Antoniou, E. Diamadopoulos * Department of Environmental Engineering, Technical University of Crete, 73100 Chania, Greece Tel. +30 (28) 2103 7795; Fax: +30 (28) 2103 7858; email: [email protected]gr

  • Cited by: 16
  • Industrial Equipment Design for the Recovery of Germanium ...

    6 flotation,7,8 adsorption onto activated carbon,9 precipitation,10 solvent extraction11,12 and sorption onto chelating exchange resins.13,14 The SX method for the recovery of germanium from fly ash is based on the germanium-catechol (C 6O 2H 6) chelate and the subsequent extraction of the complex using tri-n-octylamine ((C 8H 17) 3N) and stripping with alkaline solutions. The equilibrium ...

  • 文件大小: 503KB
  • Germanium recovery from gasification fly ash: Evaluation ...

    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 ...

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

    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 ...

  • Cited by: 2
  • Non-dispersive selective extraction of germanium from fly ...

    Gasification coal fly ashes (GCFAs) containing germanium can be leached with water to dissolve germanium as water-soluble species [5]. Several processes have been developed to

  • 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 ...

  • Hernández-Expósito, A., Chimenos, J.M., Fernández, A ...

    Request PDF On Jan 1, 2006, Pilar coca Llano and others published Hernández-Expósito, A., Chimenos, J.M., Fernández, A., Font, O.; Querol, X.; Coca, P. García ...

  • Hernández-Expósito, A., Chimenos, J.M., Fernández, A ...

    Request PDF On Jan 1, 2006, Pilar coca Llano and others published Hernández-Expósito, A., Chimenos, J.M., Fernández, A., Font, O.; Querol, X.; Coca, P. García ...

  • Is Germanium a Miracle Cure? - Healthline

    2019-10-08  Germanium comes in two forms: organic and inorganic. Both are sold as supplements. Organic germanium is a man-made blend of germanium, carbon, hydrogen, and oxygen. Common names include germanium ...

  • flotation process called

    The froth flotation method is widely used to treat various veins of gold and silver ores for the following reasons: (1) In most cases, the froth flotation process can enrich gold and silver in sulfide concentrate to the greatest extent and discard a large number of tailings, thus reducing the smelting cost. Mineral processing - Wikipedia. Froth flotation is an important concentration process ...

  • Recovery of germanium from real fly ash ... - DeepDyve

    2011-01-01  Read "Recovery of germanium from real fly ash leachates by ion-exchange extraction, Minerals Engineering" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

  • Separation of germanium and arsenic from solutions by ...

    Separation of germanium and arsenic from solutions by flotation. Int. J. Miner. Process., 21: 83-92. The selective recovery of germanium from arsenic ions in dilute aqueous solutions (concentra- tion order of 10 ppm) by dispersed-air flotation was investigated in bench scale experiments. The separation was accomplished with the initial use of an activator, such as pyrogallol and then of a ...

  • Germanium - Wikipedia

    Germanium is a chemical 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. Because it seldom ...

  • A new strategy for germanium adsorption on activated ...

    Considering that germanium species in solution are scarcely adsorbed on activated carbon, the objective of this research was to develop a method for its recovery from diluted aqueous solution by activated carbons. This process is based on the use of an organic compound as a ligand in order to form an adsorbable germanium complex; afterwards activated carbon is used as sorbent. Two different ...

  • Germanium recovery from gasification fly ash: Evaluation ...

    The complete hydrometallurgical process for the recovery of germanium from IGCC fly ash proposed may be summarised as follows: (a) extraction of germanium from IGCC fly ash at 90 °C with a water/fly ash ratio of 5 L/kg and 6 h extraction time using pure water, (b) optional subsequent enrichment by AAC or SX method (HCl media), and (c) precipitation sulfiding a 6N HCl germanium-enriched ...

  • One-Pot Synthesis of GeAs Ultrafine Particles from Coal ...

    As a secondary material, coal fly ash could be further recycled to retrieve germanium and prepare GeAs material with high added values. Hence, the aim of this paper is to propose a one-pot ...

  • Minerals Engineering International Online - Commodities ...

    P. Coca, F. Garcia Pena, Ion flotation of germanium from fly ash aqueous leachates, Chemical Engineering Journal, Vol.118 No.1-2, 2006. R.R. Moskalyk, Review of germanium processing worldwide. Minerals Engineering, Vol.17 No.3, 2004 : Subscribe! Select the list(s) you'd like to join below, enter your email address, choose a content format and click "Join." MEI Online Update MEI Online Job ...

  • One-Pot Synthesis of GeAs Ultrafine Particles from Coal ...

    As a secondary material, coal fly ash could be further recycled to retrieve germanium and prepare GeAs material with high added values. Hence, the aim of this paper is to propose a one-pot ...

  • Minerals Engineering International Online - Commodities ...

    P. Coca, F. Garcia Pena, Ion flotation of germanium from fly ash aqueous leachates, Chemical Engineering Journal, Vol.118 No.1-2, 2006. R.R. Moskalyk, Review of germanium processing worldwide. Minerals Engineering, Vol.17 No.3, 2004 : Subscribe! Select the list(s) you'd like to join below, enter your email address, choose a content format and click "Join." MEI Online Update MEI Online Job ...

  • Processes Free Full-Text The Flotation Process Can Go ...

    Ion flotation of germanium from dilute aqueous solutions (1 × 10 −4 M initial concentration): (a) Effect of pyrogallol (activator) concentration on germanium ion recovery; dodecylamine concentration kept constant at 2.2 × 10 −4 M; and (b) varying the concentration of the collector, with 3.3 × 10 −4 M pyrogallol added; effect on recovery and certification of germanium flotation mechanism.

  • germanium gallium leaching

    Germanium Gallium Ore Leaching with Sulfuric Acid. For optimum gallium and germanium extraction, a twostage countercurrent leach system was devised to adequately control the solution acidity. At operating conditions of 1,000 kg H2SO4/mt ore, 20 % solids, and 90 °C, 96% of the gallium and 85% of the germanium in the ore were extracted.

  • fly ash vanadium extraction companies

    fly ash processing plant extraction of iron - auto-spec.co.za Solvent Extraction of germanium from fly ash (FA) has been tested at pilot plant . Live Chat. Cenospheres from fly ash Welcome to APITCO . fly ash is discharged. The float is collected, further isolation is carried by froth flotation and dried. Read More. title separation of high loi fly ash authors yee soong fly ash beneficiation ...

  • Minerals 2015 OPEN ACCESS minerals

    Minerals 2015, 5 299 1. Introduction Germanium is not very abundant in the Earth’s crust, occurring only at a concentration of 1 to 7 ppm [1]. It is widely dispersed in nature, sometimes as a pure metal in association with more abundant

  • FLOTATION-SPECTROPHOTOMETRIC DETERMINATION

    資料を探す. すべてのジャーナルから探す; すべての専門分野から探す; すべての発行機関から探す; j-stageについて

  • Minerals June 2015 - Browse Articles

    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 ...

  • Flotation-spectrohotometric determination of germanium ...

    Flotation-spectrohotometric determination of germanium with phenylfluorone in coal fly ash. SHIDA Junichi , TAKAHASHI Yoshiko , OJIMA Koichi , MATSUO Tsutomu

  • Germanium Top # 18 Facts - YouTube

    2015-10-29  Germanium Top # 18 Facts. Category People Blogs; Created using YouTube Video Editor; ... (Germanium NKT275 vs. Silicon BC108) - Duration: 5:40. Joe Perkins 3,663 views. 5:40. Crystal structure ...

  • Mineralogy Characteristic Study and Exploration on the ...

    The uncompleted burned carbon was removed from fly ash by flotation firstly; the obtained flotation tailings were separated by gravity sedimentation. After three times of gravity separation, the materials still floating on the water surface were dehydrated and dried to obtain hollow microbeads. Figure 1(e) shows the microscopic characteristics of hollow microbeads. It can be seen that the ...

  • Making model aeroplane wings from expanding foam -

    2016-01-02  Making a 48 inch model flying wing from expanding foam and floor underlay. Low tech solutions. Materials, making the mould, moulding a wing half, making the flying wing and test flying.

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  • 1. Introduction - coalcgp-journal.org

    Hernández-Expósito A Chimenos J.M Fernández A.I Font O Querol X Coca P García-Peña F 2006 Ion flotation of germanium from fly ash aqueous leachates. Chemical Engineering Journal 118 69 75 Hower J.C Ruppert L.F Williams D.A 2002 Controls on boron and germanium distribution in the low-sulfur Amos coal bed, Western Kentucky coalfield, USA.

  • germanium ore extraction plant - peopleperformance.be

    Arsenic and antimony removal by oxidative aqueous leaching of IGCC fly ash during germanium extraction. ... Previous research on the extraction of Ge from Puertollano IGCC plant fly ash demonstrated that high Ge extraction yields (up to 84%) could be achieved using pure water . However, the water extraction process was nonselective Get Price; Copper Smelting Flue Dust: A Potential

  • Germanium Market Analysis, Growth by Top Companies,

    Another source of germanium is fly ash of power plants, fueled from coal deposits that contain germanium. Global Germanium Market: Key Segments. In terms of application, the global germanium market can be divided into optical fibers, infrared optics, solar cells, PET catalysts, and others. The optical fibers segment is anticipated to dominate ...

  • beneficiation plant germanium

    magnetic and flotation process iron ore beneficiation. Ore beneficiation plant,Copper ore processing plant,Iron ore ... The ore beneficiation plant is composed of various ore dressing equipment which includes ball mill, dryer machine, magnetic separator, flotation machine, ... Get Price. Appendix E Type of Unit Receiving Recycled Materials ... control sludge removal of Ge Spent acid/leachate ...

  • Chemical Engineering Journal (v.118, #1-2)

    The burning properties of carbon particles in clusters were numerically studied using a mathematical model. Chemical reactions consist in heterogeneous reactions including char combustion and in gases homogeneous reactions.

  • Materials silios

    Specific Si FZ (Float Zone) provides improved transmission on that range.  for any application in the IR range from 2 up to 14 microns. Germanium is of particular interest in the IR3 band (8-14 microns). Fused Silica. Silicon. Show More. SILIOS Technologies. Rue Gaston Imbert prolongée. ZI de Peynier-Rousset. 13790 Peynier. FRANCE. Tel : +33 (0)4 42 53 89 60. TO CONTACT US Formular ...

  • Germanium: environmental occurrence, importance

    Hernández-Expósito A, Chimenos JM, Fernández JM, Font O, Querol X, Coca P, García Peña F (2006) Ion flotation of germanium from fly ash aqueous leachates. Chem Eng J 118:69–75. doi: 10.1016/j.cej.2006.01.012. Google Scholar

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    2018-11-25  Extreme Fast Wooden Boat Build Skills - Amazing TimeLapse Boat Building Process.

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