Chapter 1 – Ubiquity and Antiquity
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Recycling of Hazardous Waste from Tertiary Aluminium Industry in A
CORE Metadata, citation and similar papers at core.ac.uk Provided by Digital.CSIC 1 Recycling of hazardous waste from tertiary aluminium 2 industry in a value-added material 3 4 Laura Gonzalo-Delgado1, Aurora López-Delgado1*, Félix Antonio López1, Francisco 5 José Alguacil1 and Sol López-Andrés2 6 7 1Nacional Centre for Metallurgical Research, CSIC. Avda. Gregorio del Amo, 8. 28040. 8 Madrid. Spain. 9 2Dpt. Crystallography and Mineralogy. Fac. of Geology. University Complutense of 10 Madrid. Spain. 11 *Corresponding author e-mail: [email protected] 12 13 Abstract 14 15 The recent European Directive on waste, 2008/98/EC seeks to reduce the 16 exploitation of natural resources through the use of secondary resource management. 17 Thus the main objective of this paper is to explore how a waste could cease to be 18 considered as waste and could be utilized for a specific purpose. In this way, a 19 hazardous waste from the tertiary aluminium industry was studied for its use as a raw 20 material in the synthesis of an added value product, boehmite. This waste is classified as 21 a hazardous residue, principally because in the presence of water or humidity, it releases 22 toxic gases such as hydrogen, ammonia, methane and hydrogen sulphide. The low 23 temperature hydrothermal method developed permits the recovery of 90% of the 24 aluminium content in the residue in the form of a high purity (96%) AlOOH (boehmite). 25 The method of synthesis consists of an initial HCl digestion followed by a gel 26 precipitation. In the first stage a 10% HCl solution is used to yield a 12.63 g.l-1 Al3+ 27 solution. -
Download PDF About Minerals Sorted by Mineral Name
MINERALS SORTED BY NAME Here is an alphabetical list of minerals discussed on this site. More information on and photographs of these minerals in Kentucky is available in the book “Rocks and Minerals of Kentucky” (Anderson, 1994). APATITE Crystal system: hexagonal. Fracture: conchoidal. Color: red, brown, white. Hardness: 5.0. Luster: opaque or semitransparent. Specific gravity: 3.1. Apatite, also called cellophane, occurs in peridotites in eastern and western Kentucky. A microcrystalline variety of collophane found in northern Woodford County is dark reddish brown, porous, and occurs in phosphatic beds, lenses, and nodules in the Tanglewood Member of the Lexington Limestone. Some fossils in the Tanglewood Member are coated with phosphate. Beds are generally very thin, but occasionally several feet thick. The Woodford County phosphate beds were mined during the early 1900s near Wallace, Ky. BARITE Crystal system: orthorhombic. Cleavage: often in groups of platy or tabular crystals. Color: usually white, but may be light shades of blue, brown, yellow, or red. Hardness: 3.0 to 3.5. Streak: white. Luster: vitreous to pearly. Specific gravity: 4.5. Tenacity: brittle. Uses: in heavy muds in oil-well drilling, to increase brilliance in the glass-making industry, as filler for paper, cosmetics, textiles, linoleum, rubber goods, paints. Barite generally occurs in a white massive variety (often appearing earthy when weathered), although some clear to bluish, bladed barite crystals have been observed in several vein deposits in central Kentucky, and commonly occurs as a solid solution series with celestite where barium and strontium can substitute for each other. Various nodular zones have been observed in Silurian–Devonian rocks in east-central Kentucky. -
À L'interface De La Sémantique Lexicale Et De La
Mots. Les langages du politique 108 | 2015 Thèmes et thématiques dans le discours politique Évaluation de la présidentiabilité (à l’interface de la sémantique lexicale et de la linguistique de corpus) Assessing présidentiabilité (at the interface point of lexical semantics to corpus linguistics) Evaluación de la présidentiabilité (el interfaz entre la semántica lexical y la linguística de corpus) Fabienne H. Baider Édition électronique URL : http://journals.openedition.org/mots/22036 DOI : 10.4000/mots.22036 ISSN : 1960-6001 Éditeur ENS Éditions Édition imprimée Date de publication : 6 octobre 2015 Pagination : 103-128 ISBN : 978-2-84788-727-3 ISSN : 0243-6450 Référence électronique Fabienne H. Baider, « Évaluation de la présidentiabilité (à l’interface de la sémantique lexicale et de la linguistique de corpus) », Mots. Les langages du politique [En ligne], 108 | 2015, mis en ligne le 06 octobre 2017, consulté le 01 mai 2019. URL : http://journals.openedition.org/mots/22036 ; DOI : 10.4000/mots.22036 © ENS Éditions Fabienne H. Baider Évaluation de la présidentiabilité (à l’interface de la sémantique lexicale et de la linguistique de corpus) Nouvellement venus dans la langue française, le nom présidentiabilité et l’ad- jectif présidentiable ont été attestés selon le Trésor de la langue française informatisé (TLFi) en 1965 et en 1980 respectivement, les deux attestations provenant de discours journalistiques. Les définitions restent floues1 (prési- dentiable : qui est en mesure de se présenter comme candidat à la présidence selon le TLFi), cependant, le thème de présidentiabilité est devenu fondamen- tal lors de l’évaluation des candidats présidentiels (Moureaud, 2008 ; Le Bart, 2009). Ce travail propose de cerner la construction dans la presse de cette thé- matique, essentielle pour le choix des électeurs, et par là même d’attester de l’importance de la linguistique de corpus dans l’étude d’une telle labellisation. -
Review 1 Sb5+ and Sb3+ Substitution in Segnitite
1 Review 1 2 3 Sb5+ and Sb3+ substitution in segnitite: a new sink for As and Sb in the environment and 4 implications for acid mine drainage 5 6 Stuart J. Mills1, Barbara Etschmann2, Anthony R. Kampf3, Glenn Poirier4 & Matthew 7 Newville5 8 1Geosciences, Museum Victoria, GPO Box 666, Melbourne 3001, Victoria, Australia 9 2Mineralogy, South Australian Museum, North Terrace, Adelaide 5000 Australia + School of 10 Chemical Engineering, The University of Adelaide, North Terrace 5005, Australia 11 3Mineral Sciences Department, Natural History Museum of Los Angeles County, 900 12 Exposition Boulevard, Los Angeles, California 90007, U.S.A. 13 4Mineral Sciences Division, Canadian Museum of Nature, P.O. Box 3443, Station D, Ottawa, 14 Ontario, Canada, K1P 6P4 15 5Center for Advanced Radiation Studies, University of Chicago, Building 434A, Argonne 16 National Laboratory, Argonne. IL 60439, U.S.A. 17 *E-mail: [email protected] 18 19 20 21 22 23 24 25 26 27 Abstract 28 A sample of Sb-rich segnitite from the Black Pine mine, Montana, USA has been studied by 29 microprobe analyses, single crystal X-ray diffraction, μ-EXAFS and XANES spectroscopy. 30 Linear combination fitting of the spectroscopic data provided Sb5+:Sb3+ = 85(2):15(2), where 31 Sb5+ is in octahedral coordination substituting for Fe3+ and Sb3+ is in tetrahedral coordination 32 substituting for As5+. Based upon this Sb5+:Sb3+ ratio, the microprobe analyses yielded the 33 empirical formula 3+ 5+ 2+ 5+ 3+ 6+ 34 Pb1.02H1.02(Fe 2.36Sb 0.41Cu 0.27)Σ3.04(As 1.78Sb 0.07S 0.02)Σ1.88O8(OH)6.00. -
The Solubility of Aluminium in Melts Containing Aluminium Halides
THE SOLUBILITY OF ALUMINIUM IN MELTS CONTAINING ALUMINIUM HALIDES A Thesis presented for the degree of Doctor of Philosophy in the University of London by John Dyson Usher London, May 1965 ABSTRACT A technique for measuring the solubility of aluminium in NaF-A1F3 and Nall-A1F3+5%A1203 melts has been developed using a refractory titanium boride- carbide crucible and a gas volumetric method of analysis. Experiments were conducted at 10209 1100 and 1180°C; in both systems no change in solubility limit was detected over the experimental composition range of 25.6 - 36.6 and 25.8 - 31.9 mol % AlF3 respectively. The figures in the pure fluoride are 0.022 0.041 and 0.072 wt %; in the alumina melts 0.073, 0.121 and 0.169 wt %. Solution mechanisms have been suggested which account for the observed behaviour, and an attempt has been made to interpret the current inefficiency process in the reduction cell in terms of the results. CONTENTS 1. INTRODUCTION Page 1.1 Aluminium Reduction Cell - Brief Description 1 1.2 Current Efficiency 3 1.2.1 Measurement 3 1.2.2 Cell Variables and Current Efficiency 5 1.2.2 Postulated Mechanisms of Metal Lose 6 1.3 Origins of Present Work 7 1.3.1 Information Required 7 1.3.A Preliminary Theoretical Approach 9 1.4 Metal-Molten Salt Solutions 11 1.4.1 General 11 1.4.2 Nature of Metal-Molten Salt Solutions 16 1.4.3 Extent of Solubility 19 1.4.4 Effect of Foreign Ions on Metal Solubility 23 1.5 Structure of Cryolite and Cryolite-Alumina Melts 25 1.5.1 Pure Molten Cryolite 25 1.5.2 Cryolite-Alumina Melts 33 1.6 Thermodynamics of Aluminium+Cryolite 40 1.6.1 Equilibrium 1.6(i): Experimental 40 1.6.2 Equilibrium 1.6(i): Calculations 42 1.6.3 Equilibrium 1.6(ii) 45 1.7 Previous Experimental Work 46 1.7.1 Analysis by Metal Weight Loss 48 1.7.2 Gas Volumetric Method 52 2. -
Recovery of Carbon and Cryolite from Spent Pot Lining of Aluminium Reduction Cells by Chemical Leaching
Trans. Nonferrous Met. Soc. China 22(2012) 222−227 Recovery of carbon and cryolite from spent pot lining of aluminium reduction cells by chemical leaching SHI Zhongning, LI Wei, HU Xianwei, REN Bijun, GAO Bingliang, WANG Zhaowen School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China Received 29 November 2010; accepted 8 October 2011 Abstract: A twostep alkalineacidic leaching process was conducted to separate the cryolite from spent pot lining and to purify the carbon. The influencing factors of temperature, time, and the ratio of liquid to solid in alkaline and acidic leaching were investigated. The results show that the recovery of soluble compounds of Na3AlF6 and Al2O3 dissolving into the solution during the NaOH leaching is 65.0%,and the purity of carbon reaches 72.7%. During the next step of HCl leaching, the recovery of soluble compounds of CaF2 and NaAl11O17 dissolving into the HCl solution is 96.2%, and the carbon purity increases to 96.4%. By mixing the acidic leaching solution and the alkaline leaching solution, the cryolite precipitates under a suitable conditions of pH value 9 at 70 °C for 2 h. The cryolite precipitating rate is 95.6%, and the purity of Na3AlF6 obtained is 96.4%. Key words: spent pot lining; recovery; chemical leaching; aluminium electrolysis method separates the carbon and fluoride according to 1 Introduction the difference in solubility, density and surface properties between carbon and fluorides. For example, the froth With a rapid development of the primary aluminium flotation technology is a typically physical separation industry, more and more spent pot lining (SPL) is process for SPL treatment [3]. -
Mineral Processing
Mineral Processing Foundations of theory and practice of minerallurgy 1st English edition JAN DRZYMALA, C. Eng., Ph.D., D.Sc. Member of the Polish Mineral Processing Society Wroclaw University of Technology 2007 Translation: J. Drzymala, A. Swatek Reviewer: A. Luszczkiewicz Published as supplied by the author ©Copyright by Jan Drzymala, Wroclaw 2007 Computer typesetting: Danuta Szyszka Cover design: Danuta Szyszka Cover photo: Sebastian Bożek Oficyna Wydawnicza Politechniki Wrocławskiej Wybrzeze Wyspianskiego 27 50-370 Wroclaw Any part of this publication can be used in any form by any means provided that the usage is acknowledged by the citation: Drzymala, J., Mineral Processing, Foundations of theory and practice of minerallurgy, Oficyna Wydawnicza PWr., 2007, www.ig.pwr.wroc.pl/minproc ISBN 978-83-7493-362-9 Contents Introduction ....................................................................................................................9 Part I Introduction to mineral processing .....................................................................13 1. From the Big Bang to mineral processing................................................................14 1.1. The formation of matter ...................................................................................14 1.2. Elementary particles.........................................................................................16 1.3. Molecules .........................................................................................................18 1.4. Solids................................................................................................................19 -
Bauxite and Alumina in 1999
BAUXITE AND ALUMINA By Patricia A. Plunkert Domestic survey data and tables were prepared by Micheal George, statistical assistant, and the world production tables were prepared by Regina R. Coleman, international data coordinator. Bauxite is a naturally occurring, heterogeneous material accessible supply for the future (Plunkert, 2000). comprised primarily of one or more aluminum hydroxide U.S. production of alumina (calcined equivalent), derived minerals plus various mixtures of silica (SiO2), iron oxide almost exclusively from imported metallurgical-grade bauxite, (Fe2O3), titania (TiO2), aluminosilicates (clay, etc.), and other decreased by 12% in 1999 compared with that of 1998. An impurities in trace amounts. The principal aluminum estimated 94% of the alumina shipped by U.S. refineries went hydroxide minerals found in varying proportions within bauxite to domestic primary smelters for aluminum metal production. are gibbsite [Al(OH)3] and the polymorphs, boehmite and Consumption by the abrasives, chemicals, refractories, and diaspore [both AlO(OH)]. specialties industries accounted for the remainder of U.S. Bauxite is typically classified according to its intended alumina shipments. commercial application, such as abrasive, cement, chemical, World output of alumina increased slightly in 1999. The metallurgical, and refractory. Of all bauxite mined, principal producing countries, in descending order of alumina approximately 85% is converted to alumina (Al2O3) for the output, were Australia, the United States, China, and Jamaica. production of aluminum metal, an additional 10% goes to These countries accounted for more than 55% of the world’s nonmetal uses as various forms of specialty alumina, and the production; Australia alone accounted for almost one-third of remaining 5% is used for nonmetallurgical bauxite total world production. -
Constellium Business and Sustainability Report 2020
BUSINESS AND SUSTAINABILITY PERFORMANCE REPORT 2020 REVEALING OUR RESILIENCE Revealing Sustainability Per formance our Resilience Report Report 04 CEO Interview 40 Sustainability Highlights 70 Financial Statements 07 A Global Sector Leader 42 Assessing Material 74 Sustainability Performance 08 Creating Value Throughout Sustainability Risks 82 GRI the Lifecycle of Aluminium 44 Staying One Step Ahead of Market 88 Memberships 10 CFO Interview Regulatory Changes 89 Report of the Independent Third Party 11 Business Units 45 Adjusting Our Targets and Defning 12 Pursuing a Comprehensive Strategy Future Perspectives 13 Our Values 46 Our Sustainability Targets for 2021 16 Governance 47 Analyzing Environmental Impacts 22 Focusing on Environment, Health, with Life Cycle Assessments and Safety (EHS) 48 Developing Products 24 Manufacturing Excellence with Envrionmental Benefts 50 Championing Recycling 52 Prioritizing Customer Satisfaction Business 54 Attracting, Engaging, and Retaining Report the Best People 56 Gender Diversity 28 PacKaging 58 Supporting Our Local Communities 30 Automotive 59 Respecting Human Rights 34 Aerospace 61 Limiting Landflled Waste 36 Transportation, Industry, and Defense 62 Curtailing Energy Use and Greenhouse Gas Emissions 65 Minimizing Air Emissions and Managing Water 66 Insisting Upon Sustainable Procurement 68 Actively Supporting the Aluminium Stewardship Initiative Constellium’s non-financial performance statement (“déclaration de performance extra-financière”), in- cluded in this report (as specified on page 74), was verified by an independent third party, Pricewaterhouse- Coopers Audit. PricewaterhouseCoopers Audit verifed compliance of our statement with the provisions of the French Commercial Code (article R. 225-105), along with the fairness of the information provided in our state- ment, such as Key performance indicators and measures taken to address risks (article R. -
Mineralogical Study of the Advanced Argillic Alteration Zone at the Konos Hill Mo–Cu–Re–Au Porphyry Prospect, NE Greece †
Article Mineralogical Study of the Advanced Argillic Alteration Zone at the Konos Hill Mo–Cu–Re–Au Porphyry Prospect, NE Greece † Constantinos Mavrogonatos 1,*, Panagiotis Voudouris 1, Paul G. Spry 2, Vasilios Melfos 3, Stephan Klemme 4, Jasper Berndt 4, Tim Baker 5, Robert Moritz 6, Thomas Bissig 7, Thomas Monecke 8 and Federica Zaccarini 9 1 Faculty of Geology & Geoenvironment, National and Kapodistrian University of Athens, 15784 Athens, Greece; [email protected] 2 Department of Geological and Atmospheric Sciences, Iowa State University, Ames, IA 50011, USA; [email protected] 3 Faculty of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; [email protected] 4 Institut für Mineralogie, Westfälische Wilhelms-Universität Münster, 48149 Münster, Germany; [email protected] (S.K.); [email protected] (J.B.) 5 Eldorado Gold Corporation, 1188 Bentall 5 Burrard St., Vancouver, BC V6C 2B5, Canada; [email protected] 6 Department of Mineralogy, University of Geneva, CH-1205 Geneva, Switzerland; [email protected] 7 Goldcorp Inc., Park Place, Suite 3400-666, Burrard St., Vancouver, BC V6C 2X8, Canada; [email protected] 8 Center for Mineral Resources Science, Department of Geology and Geological Engineering, Colorado School of Mines, 1516 Illinois Street, Golden, CO 80401, USA; [email protected] 9 Department of Applied Geosciences and Geophysics, University of Leoben, Leoben 8700, Austria; [email protected] * Correspondence: [email protected]; Tel.: +30-698-860-8161 † The paper is an extended version of our paper published in 1st International Electronic Conference on Mineral Science, 16–21 July 2018. Received: 8 October 2018; Accepted: 22 October 2018; Published: 24 October 2018 Abstract: The Konos Hill prospect in NE Greece represents a telescoped Mo–Cu–Re–Au porphyry occurrence overprinted by deep-level high-sulfidation mineralization. -
Department of Justice Will Require a Divestiture If Alcan Inc. Completes Its Pending Tender Offer for Pechiney S.A
FOR IMMEDIATE RELEASE AT MONDAY, SEPTEMBER 29, 2003 (202) 514-2007 WWW.USDOJ.GOV TDD (202) 514-1888 DEPARTMENT OF JUSTICE WILL REQUIRE A DIVESTITURE IF ALCAN INC. COMPLETES ITS PENDING TENDER OFFER FOR PECHINEY S.A. Sale of Pechiney’s Ravenswood, West Virginia, Aluminum Rolling Mill and Related Assets Will Preserve Competition in the North American Market for Brazing Sheet WASHINGTON, D.C. – The Department of Justice reached a settlement today with Alcan Inc. that requires Alcan to divest Pechiney S.A.’s aluminum rolling mill in Ravenswood, West Virginia, if Alcan’s pending $4.6 billion tender offer for Pechiney is successful. The tender offer, publicly announced in early July and recently endorsed by Pechiney’s board of directors, is expected to be completed in late November 2003. The Department said that the acquisition, as originally proposed, would substantially lessen competition in the development, production, and sale of brazing sheet, an aluminum alloy used in fabricating radiators, oil coolers, heaters, and air conditioning units for motor vehicles, and would likely result in higher prices. The Department’s Antitrust Division filed a lawsuit today in U.S. District Court in Washington, D.C. to block the original transaction. At the same time, the Department filed a proposed consent decree that, if approved by the court, would resolve the Department's competitive concerns and the lawsuit. “The divestiture of Pechiney’s Ravenswood mill will preserve competition for brazing sheet sold in North America, and will allow motor vehicle parts manufacturers to benefit from Alcan’s aggressive competition,” said R. Hewitt Pate, Assistant Attorney General in charge of the Department’s Antitrust Division. -
Chemical Name Federal P Code CAS Registry Number Acutely
Acutely / Extremely Hazardous Waste List Federal P CAS Registry Acutely / Extremely Chemical Name Code Number Hazardous 4,7-Methano-1H-indene, 1,4,5,6,7,8,8-heptachloro-3a,4,7,7a-tetrahydro- P059 76-44-8 Acutely Hazardous 6,9-Methano-2,4,3-benzodioxathiepin, 6,7,8,9,10,10- hexachloro-1,5,5a,6,9,9a-hexahydro-, 3-oxide P050 115-29-7 Acutely Hazardous Methanimidamide, N,N-dimethyl-N'-[2-methyl-4-[[(methylamino)carbonyl]oxy]phenyl]- P197 17702-57-7 Acutely Hazardous 1-(o-Chlorophenyl)thiourea P026 5344-82-1 Acutely Hazardous 1-(o-Chlorophenyl)thiourea 5344-82-1 Extremely Hazardous 1,1,1-Trichloro-2, -bis(p-methoxyphenyl)ethane Extremely Hazardous 1,1a,2,2,3,3a,4,5,5,5a,5b,6-Dodecachlorooctahydro-1,3,4-metheno-1H-cyclobuta (cd) pentalene, Dechlorane Extremely Hazardous 1,1a,3,3a,4,5,5,5a,5b,6-Decachloro--octahydro-1,2,4-metheno-2H-cyclobuta (cd) pentalen-2- one, chlorecone Extremely Hazardous 1,1-Dimethylhydrazine 57-14-7 Extremely Hazardous 1,2,3,4,10,10-Hexachloro-6,7-epoxy-1,4,4,4a,5,6,7,8,8a-octahydro-1,4-endo-endo-5,8- dimethanonaph-thalene Extremely Hazardous 1,2,3-Propanetriol, trinitrate P081 55-63-0 Acutely Hazardous 1,2,3-Propanetriol, trinitrate 55-63-0 Extremely Hazardous 1,2,4,5,6,7,8,8-Octachloro-4,7-methano-3a,4,7,7a-tetra- hydro- indane Extremely Hazardous 1,2-Benzenediol, 4-[1-hydroxy-2-(methylamino)ethyl]- 51-43-4 Extremely Hazardous 1,2-Benzenediol, 4-[1-hydroxy-2-(methylamino)ethyl]-, P042 51-43-4 Acutely Hazardous 1,2-Dibromo-3-chloropropane 96-12-8 Extremely Hazardous 1,2-Propylenimine P067 75-55-8 Acutely Hazardous 1,2-Propylenimine 75-55-8 Extremely Hazardous 1,3,4,5,6,7,8,8-Octachloro-1,3,3a,4,7,7a-hexahydro-4,7-methanoisobenzofuran Extremely Hazardous 1,3-Dithiolane-2-carboxaldehyde, 2,4-dimethyl-, O- [(methylamino)-carbonyl]oxime 26419-73-8 Extremely Hazardous 1,3-Dithiolane-2-carboxaldehyde, 2,4-dimethyl-, O- [(methylamino)-carbonyl]oxime.