DOCSLIB.ORG

Significance of Mineralogy in the Development of Flowsheets for Processing Uranium Ores

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
Significance of Mineralogy in the Development of Flowsheets for Processing Uranium Ores JfipwK LEACHING TIME REAGENTS TEMPERATURE FLOCCULANT CLARITY AREA COUNTER CURRENT DECANTATION It 21 21 J^^LJt TECHNICAL REPORTS SERIES No.19 6 Significance of Mineralogy in the Development of Flowsheets for Processing Uranium Ores \W# INTERNATIONAL ATOMIC ENERGY AGENCY, VIENNA, 1980 SIGNIFICANCE OF MINERALOGY IN THE DEVELOPMENT OF FLOWSHEETS FOR PROCESSING URANIUM ORES The following States are Members of the International Atomic Energy Agency: AFGHANISTAN HOLY SEE PHILIPPINES ALBANIA HUNGARY POLAND ALGERIA ICELAND PORTUGAL ARGENTINA INDIA QATAR AUSTRALIA INDONESIA ROMANIA AUSTRIA IRAN SAUDI ARABIA BANGLADESH IRAQ SENEGAL BELGIUM IRELAND SIERRA LEONE BOLIVIA ISRAEL SINGAPORE BRAZIL ITALY SOUTH AFRICA BULGARIA IVORY COAST SPAIN BURMA JAMAICA SRI LANKA BYELORUSSIAN SOVIET JAPAN SUDAN SOCIALIST REPUBLIC JORDAN SWEDEN CANADA KENYA SWITZERLAND CHILE KOREA, REPUBLIC OF SYRIAN ARAB REPUBLIC COLOMBIA KUWAIT THAILAND COSTA RICA LEBANON TUNISIA CUBA LIBERIA TURKEY CYPRUS LIBYAN ARAB JAMAHIRIYA UGANDA CZECHOSLOVAKIA LIECHTENSTEIN UKRAINIAN SOVIET SOCIALIST DEMOCRATIC KAMPUCHEA LUXEMBOURG REPUBLIC DEMOCRATIC PEOPLE'S MADAGASCAR UNION OF SOVIET SOCIALIST REPUBLIC OF KOREA MALAYSIA REPUBLICS DENMARK MALI UNITED ARAB EMIRATES DOMINICAN REPUBLIC MAURITIUS UNITED KINGDOM OF GREAT ECUADOR MEXICO BRITAIN AND NORTHERN EGYPT MONACO IRELAND EL SALVADOR MONGOLIA UNITED REPUBLIC OF ETHIOPIA MOROCCO CAMEROON FINLAND NETHERLANDS UNITED REPUBLIC OF FRANCE NEW ZEALAND TANZANIA GABON NICARAGUA UNITED STATES OF AMERICA GERMAN DEMOCRATIC REPUBLIC NIGER URUGUAY GERMANY, FEDERAL REPUBLIC OF NIGERIA VENEZUELA GHANA NORWAY VIET NAM GREECE PAKISTAN YUGOSLAVIA GUATEMALA PANAMA ZAIRE HAITI PARAGUAY ZAMBIA PERU The Agency's Statute was approved on 23 October 1956 by the Conference on the Statute of the IAEA held at United Nations Headquarters, New York; it entered into force on 29 July 1957. The Headquarters of the Agency are situated in Vienna. Its principal objective is "to accelerate and enlarge the contribution of atomic energy to peace, health and prosperity throughout the world". @ IAEA,1980 Permission to repfoduce or translate the information contained in this publication may be obtained by writing to the International Atomic Energy Agency, Wagramerstrasse 5, P.O. Box 100, A-1400 Vienna, Austria. Printed by the IAEA in Austria January 1980 TECHNICAL REPORTS SERIES No. 196 SIGNIFICANCE OF MINERALOGY IN THE DEVELOPMENT OF FLOWSHEETS FOR PROCESSING URANIUM ORES INTERNATIONAL ATOMIC ENERGY AGENCY VIENNA, 1980 SIGNIFICANCE OF MINERALOGY IN THE DEVELOPMENT OF FLOWSHEETS FOR PROCESSING URANIUM ORES IAEA, VIENNA, 1980 STI/DOC/10/196 ISBN 92-0- 145080-X FOREWORD This report has been prepared from material developed at and subsequent to a consultants' meeting held in Vienna in January 1978. The main purpose of the meeting was to prepare a document in the form of a guide for planning and developing treatment flowsheets for uranium ore processing. It was apparent that ore mineralogy, analysed, described and interpreted in ways most meaningful to the metallurgist, is the most essential information required for forming the basis of such planning. This topic, here termed metallurgical mineralogy, is therefore a major theme of this publication. In preparing the report the Agency has borne in mind the important need to impart the experience and knowledge gained in the more developed countries to those who are in the early stages of exploiting their uranium resources. The contents may be criticized as lacking, in some respects, the requisite depth and detail of treatment. The Agency and the consultants are conscious of the need to expand the information in a number of ways. However, the report is presented in its present form in the belief that, as the first attempt to correlate, on a world-wide basis, ore type with processing, it will be considered as a useful basis for future development of these themes. The IAEA wishes to express its thanks to the consultants who took part in the formulation of this report. Particular gratitude is due to the chairman, Mr. H.E. James, of the Atomic Energy Board, South Africa, who made a notable contribution to the work. The final compilation was the responsibility of Mr. F.R. Hartley of the Agency's Division of Nuclear Power and Reactors. CONTENTS PART I: PRINCIPLES AND PRACTICE OF URANIUM MINERALOGY AND ORE-PROCESSING METALLURGY Introduction 1 1. Uranium occurrence and geochemistry 2 1.1. Distribution of geochemical cycle 2 1.2. Uranium ore deposites 5 1.3. Other uranium occurrences 6 2. Metallurgical mineralogy 6 2.1. Introduction 6 2.2. Uranium minerals 7 2.3. Mineralogical source data .„... 8 2.4. Techniques of metallurgical mineralogy 9 2.5. Suggested modus operandi 17 2.6. Conclusions 21 3. Uranium ore-processing metallurgy 22 3.1. Introduction 22 3.2. Processing chemistry 23 3.3. The metallurgical investigation 29 3.4. Preliminary assessment 47 3.5. Pilot plant 49 4. Industrial ore-processing practice 50 4.1. Uranium ore-processing technology 50 4.2. Environmental aspects of uranium ore processing 71 4.3. Energy requirements and processing costs 74 5. New developments in processing technology 82 5.1. Introduction 82 5.2. Preconcentration and sorting 82 5.3. Crushing and grinding 83 5.4. Leaching 83 5.5. Solids/liquid separation in high-rate thickeners 89 5.6. Concentration/purification by CIX 90 5.7. Concentration/purification by SX 100 5.8. Precipitation 102 5.9. Flowsheet innovation 103 References to Part I 105 PART II: SELECTED EXAMPLES OF SPECIFIC URANIUM DEPOSITS AND OPERATIONS Case Studies Illustrating the Characteristics of the Various Ore Types 109 1. Sandstone deposits 109 1.1. United States of America Ill 1.2. Niger — Agades basin 119 1.3. Argentina — Sierra Pintala 122 2. Quartz-pebble conglomerates 123 2.1. Canada: Elliot Lake — Agnew Lake District 124 2.2. South Africa: Witwatersrand. Orange Free State Goldfields 127 3. Vein-type deposits 134 3.1. Canada — northern Saskatchewan 135 3.2. Australia — Alligator Rivers uranium province 140 4. Granitic deposits 146 4.1. Namibia (South West Africa): Rossing 146 4.2. Australia - Crocker Well 148 5. Pegmatites, carbonatites and syenites 149 5.1. Canada - Pegmatites Bancroft 149 5.2. South Africa - Carbonatites - Phalaborwa 150 5.3. Greenland — Syenites - Ilimaussaq 152 6. Uraniferous shales 152 6.1. Egypt - Quatrani 153 6.2. Sweden — Ranstad 153 6.3. USA - Chattanooga 154 7. Uraniferous lignites 155 7.1. USA: Dakota, Montana, Wyoming 156 8. Calcretes 158 8.1. Australia - Yeelirrie 158 9. Uranium recovery from unconventional sources 160 9.1. Copper leach liquors 160 9.2. Phosphoric acid 160 9.3. Sea-water s 161 References to Part II 162 PART III: SUMMARY TABLES ON SPECIFIC URANIUM DEPOSITS AND PROCESSING PLANTS 1. Explanation of numbering system 163 2. Explanation of details under each heading 171 Bibliography to Parts II and III 181 Summary Tables 189 List of Consultants 267 PARTI PRINCIPLES AND PRACTICE OF URANIUM MINERALOGY AND ORE-PROCESSING METALLURGY INTRODUCTION The amount of uranium which can be mined and recovered as a marketable product, and the costs of mining and processing, are the two key factors that determine whether a uranium deposit can be exploited economically. The mineralogy of a uranium ore fundamentally influences the technology and economics of its exploitation and determines the ultimate quantitative uranium recovery that can be achieved by any particular process. Therefore, in planning a programme of investigation into the extraction of uranium from any ore, a knowledge of its mineralogy and the behaviour of the ores in particular process environments is important. Although it is not infrequent that the mineralogist is brought in to explain treatment difficulties that have been encountered by the extractive metallurgist during the course of an investigation, the adequate application of mineralogical data is seldom practised in the initial planning of an investigation into a treatment process. The metallurgist experienced in the technology of uranium ore processing will use his knowledge of mineralogy subconsciously in defining a treatment problem. Indeed, the nature of his experience is an intuitive understanding of the type of treatment flowsheet most likely to pertain to the particular ore mineralogy. Perhaps for this reason, the significance of mineralogy in the develop­ ment of flowsheets for the processing of uranium ores is often understated. Rocks are complex assemblages of minerals and differ widely in detail of composition and texture so that no single ore is exactly similar to another. Samples from one orebody vary, often significantly. These differences mean that at no time can a flowsheet be realistically optimized for all likely variations, nor can the treatment flowsheet be transferred in detail from one ore to another. A flowsheet is always a compromise of many factors and its development remains dynamic throughout the life of the mine. A knowledge of the mineralogy of the ore, the variations of that mineralogy and an appreciation of the behaviour of minerals and mineral assemblages form a sound basis for deciding on the best compromise. The objective of this report is to introduce the basic concepts relating mineralogy to the behaviour of an ore and to indicate the value of information, which can be obtained from a correctly oriented mineralogical analysis, in the 1 development of the initial concepts for the general treatment flowsheet. These can then form the basis for testing by experiment and economic study, leading ultimately to the selection of a specific flowsheet and the design of the ore processing plant. Sections 1, 2 and 3 are therefore devoted to this theme and are directed more particularly to the less experienced professional to give guidance in setting about a work plan. However, the experienced person should also find these sections useful in putting some of the basic concepts in perspective. Section 4 is a brief review of the unit operations applied to the typical uranium treatment flowsheets. It includes a summary of the relative energy and cost relationships of the operations.
Load more

Recommended publications
  • A Study of Some Methods of Concentrating Uranium and Radium in Carnotite Ore
    Scholars' Mine Masters Theses Student Theses and Dissertations 1932 A study of some methods of concentrating uranium and radium in carnotite ore H. L. Gibbs Follow this and additional works at: https://scholarsmine.mst.edu/masters_theses Part of the Chemical Engineering Commons Department: Recommended Citation Gibbs, H. L., "A study of some methods of concentrating uranium and radium in carnotite ore" (1932). Masters Theses. 4815. https://scholarsmine.mst.edu/masters_theses/4815 This thesis is brought to you by Scholars' Mine, a service of the Missouri S&T Library and Learning Resources. This work is protected by U. S. Copyright Law. Unauthorized use including reproduction for redistribution requires the permission of the copyright holder. For more information, please contact [email protected]. A STUDY OF SOl.ill T,::ETHODS O:B" COl1C}~;TTRl~TnTG TJP"':~..1TTIJL! ;:J·TD RIillIOIJ IN C.AR~OTIT!~ ORE. by lliJ10LD L. GIBBS A THESIS submitted to the faculty of the SCI-TOOL OF MINES AND 1~'IETIJ:.,LURGY OF THE m·...lVERSITY OJ!' I'~IaSOURI in partial fulfillment of the work required for the Degree of' Ivll~T:ER OF SCIENCE n~ C:EIa1IC.AL ENGnmERnTG Rolla, ~~iissour1 1 9 3 2 Al'proved by f.A.J. -,. ~ Acknowledgments • • • • • • • 1 Object • • ••• • • • 2 Introduction • • • 2 Description of the Ore • • • 3 Examination o~ the Ore • • • • • 3 Methods of Analysis • • • • • • 7 Flocculation Tests • • • g Flotation of Carnotite • • • • • II Results of Flotation Testa • • • • 15 Recovery of Radium :rrom Leached Ore by Flotation • • • • 18 Summary
    [Show full text]
  • Curbing Illicit Mercury and Gold Flows in West Africa: Options for a Regional Approach
    Curbing Illicit Mercury and Gold Flows in West Africa: Options for a Regional Approach i INCLUSIVE AND SUSTAINABLE INDUSTRIAL DEVELOPMENT ii Curbing Illicit Mercury and Gold Flows in West Africa: Options for a Regional Approach iii November 2018 iv © UNIDO 2018. All rights reserved. This document has been produced without formal United Nations editing. The designations employed and the presentation of the material in this document do not imply the expression of any opinion whatsoever on the part of the Secretariat of the United Nations Industrial Development Organization (UNIDO) concerning the legal status of any country, territory, city or area or of its authorities, or concerning the delimitation of its frontiers or boundaries, or its economic system or degree of development. Designations such as ‘developed’, ‘industrialized’ or ‘developing’ are intended for statistical convenience and do not necessarily express a judgement about the stage reached by a particular country or area in the development process. Mention of firm names or commercial products does not constitute an endorsement by UNIDO. Unless otherwise men- tioned, all references to sums of money are given in United States dollars. References to ‘tons’ are to metric tons, unless otherwise stated. All photos © UNIDO unless otherwise stated. Cover photo by Sadibou Sylla Acknowledgements This report was authored by Marcena Hunter of the Global Initiative Against Transnational Organized Crime. The report is part of the United Nations Industrial Development Organization (UNIDO) project, funded by the Government of Switzerland, to assist the Economic Community of West African States (ECOWAS) in its early implementation of the Minamata Convention. More information about the Minamata Convention and UNIDO’s work can be found on UNIDO’s website <https://www.unido.org/mercury> or by emailing Gabriela Eigenmann at [email protected].
    [Show full text]
  • Roscoelite K(V ; Al; Mg)2Alsi3o10(OH)2 C 2001 Mineral Data Publishing, Version 1.2 ° Crystal Data: Monoclinic
    3+ Roscoelite K(V ; Al; Mg)2AlSi3O10(OH)2 c 2001 Mineral Data Publishing, version 1.2 ° Crystal Data: Monoclinic. Point Group: 2=m: As minute scales, in druses, rosettes, or fan-shaped groups; ¯brous and in felted aggregates; as impregnations, massive. Physical Properties: Cleavage: Perfect on 001 . Hardness = Soft. D(meas.) = 2.92{2.94 D(calc.) = [2.89] f g Optical Properties: Transparent to translucent. Color: Dark clove-brown, greenish brown to dark greenish brown. Luster: Pearly. Optical Class: Biaxial ({). Pleochroism: X = green-brown; Y = Z = olive-green. ® = 1.59{1.610 ¯ = 1.63{1.685 ° = 1.64{1.704 2V(meas.) = 24.5±{39.5± Cell Data: Space Group: C2=c: a = 5.26 b = 9.09 c = 10.25 ¯ = 101:0± Z = 2 X-ray Powder Pattern: Paradox Valley, Colorado, USA. 10.0 (100), 4.54 (80), 3.35 (80), 2.60 (80), 1.52 (60), 3.66 (50), 3.11 (50) Chemistry: (1) SiO2 47.82 Al2O3 12.60 V2O5 19.94 FeO 3.30 MgO 2.43 CaO trace Na2O 0.33 K2O 8.03 + H2O 5.13 Total 99.58 (1) Stuckslager mine, California, USA. Polymorphism & Series: Forms a series with muscovite; 1M polytype. Mineral Group: Mica group. Occurrence: An early-stage gangue mineral in low-temperature epithermal Au-Ag-Te deposits; from the oxidized portions of low-temperature sedimentary U-V ores. Association: Quartz, pyrite, carbonates, °uorite, gold (Au-Ag-Te mineral association); corvusite, hewettite, carnotite, tyuyamunite (U-V mineral association). Distribution: In the USA, from the Stuckslager mine, Lotus, El Dorado Co., California; in Colorado, from Cripple Creek, Teller Co., La Plata district, La Plata Co., Magnolia district, Boulder Co., the Gateway district, Mesa Co., in the Uravan and Paradox, Bull Canyon, and Slick Rock districts, in Montrose, San Miguel, and Dolores Cos.
    [Show full text]
  • S Ndlovu (PDF)
    Extraction of Gold Then, Now and the Future Prof Sehliselo Ndlovu DST/NRF SARChI: Hydrometallurgy and Sustainable Development University of the Witwatersrand, Johannesburg Building a Robust Minerals Industry 3 – 4 July 2017, Cresta Lodge, Harare University of the Witwatersrand Johannesburg Founded Oct. 1896: School of Mines Approx. 37 000 Students 5 Faculties, 33 Schools, 3610 Courses >160 000 Degrees Conferred since 1922 55% Female Students 10 National Centres of Excellence Home to the Bidvest Football Club( Current PSL league Champions) Evolution in Gold Processing Past Technologies • Amalgamation • Panning Current Technologies • Cyanide leaching • Processing of Emerging and Future refractory ores Technologies • Bio-oxidation • Ionic liquids • Alternative leaching • Ultrasonic leaching reagents • Corn starch?? Past Technologies Used in Ancient Times History of gold extends back at least 6,000 years. Egypt and Mesopotamia around 4000 BC. Gravity Separation: Gold Panning Gold concentrated by washing lighter river sands with water Leaves dense gold particles Alternative- wash gold-bearing sand and gravel over a woollen fleece Traps heavier gold dust that would sink into the wool fibres. Advantages • Simplicity Disadvantages • Labour intensive Gravity Separation: Sluicing • Water is channelled to flow through a sluice-box. • Sluice-box is essentially a man-made channel with riffles (barriers) at the bottom. • Riffles create dead-zones in the water current which allows gold to drop out of suspension. Sluicing and panning results in the direct recovery of small gold nuggets and flakes. Gold Parting: Salt Cementation Process • Invented to remove Ag from Au-Ag mixtures around 6th century BC. Mix: argentiferous gold foil, common salt, brick dust or burnt clay and urine in a sealed container.
    [Show full text]
  • 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
    [Show full text]
  • Page 1 of 9 SAFETY DATA SHEET CARNOTITE ORE SECTION 1
    SAFETY DATA SHEET CARNOTITE ORE SECTION 1: CHEMICAL PRODUCTS & COMPANY IDENTIFICATION NBL Program Office U. S. Department of Energy, 1 Science.gov Way, Oak Ridge, TN 37830 1-865-576-0598 Emergency Phone Numbers: 1-865-576-0598 Substance: Carnotite Ore Blend Trade Names/Synonyms: Potassium uranium vanadate, Uranium Oxide (U3O8), Uranous Oxide, Triuranium Octaoxide, Uranite Nasturan, CRM 4, CRM 5 Use and Restriction: This material is prepared for use as a standard or for inter- laboratory comparison programs at analytical laboratories, which routinely handle uranium and/or plutonium. NBL expects that recipients of their material are in compliance with 29 CFR 1910.1200(h) which requires employers to provide employees with effective information and training in hazardous chemicals in their work area. SECTION 2: HAZARDS IDENTIFICATION OSHA Hazards Toxic by inhalation, toxic by ingestion. Target Organs Kidney, Liver, Lungs, Brain. GHS Label Elements Pictogram Signal Word: Danger Page 1 of 9 Hazard Statements: Toxic by inhalation and ingestion Danger of cumulative effects May damage kidneys Precautionary Statements: Avoid Breathing Dust Avoid contact with skin, eyes and clothing When using do not eat, drink or smoke In case of accident or if you feel unwell seek medical advice immediately Use only with adequate ventilation GHS Classification Skin Irritation (Category 2) Eye Irritation (Category 2) Specific target organ toxicity - repeated exposure (Category 2) Specific target organ toxicity – acute exposure (Category 2) GHS Hazard Ratings R23/25: Toxic by inhalation and ingestion R33: Danger of cumulative effects S20/21: When using do not eat, drink or smoke S45: In case of accident or if you feel unwell seek medical advice immediately S61: Avoid release to the environment.
    [Show full text]
  • Uraninite Alteration in an Oxidizing Environment and Its Relevance to the Disposal of Spent Nuclear Fuel
    TECHNICAL REPORT 91-15 Uraninite alteration in an oxidizing environment and its relevance to the disposal of spent nuclear fuel Robert Finch, Rodney Ewing Department of Geology, University of New Mexico December 1990 SVENSK KÄRNBRÄNSLEHANTERING AB SWEDISH NUCLEAR FUEL AND WASTE MANAGEMENT CO BOX 5864 S-102 48 STOCKHOLM TEL 08-665 28 00 TELEX 13108 SKB S TELEFAX 08-661 57 19 original contains color illustrations URANINITE ALTERATION IN AN OXIDIZING ENVIRONMENT AND ITS RELEVANCE TO THE DISPOSAL OF SPENT NUCLEAR FUEL Robert Finch, Rodney Ewing Department of Geology, University of New Mexico December 1990 This report concerns a study which was conducted for SKB. The conclusions and viewpoints presented in the report are those of the author (s) and do not necessarily coincide with those of the client. Information on SKB technical reports from 1977-1978 (TR 121), 1979 (TR 79-28), 1980 (TR 80-26), 1981 (TR 81-17), 1982 (TR 82-28), 1983 (TR 83-77), 1984 (TR 85-01), 1985 (TR 85-20), 1986 (TR 86-31), 1987 (TR 87-33), 1988 (TR 88-32) and 1989 (TR 89-40) is available through SKB. URANINITE ALTERATION IN AN OXIDIZING ENVIRONMENT AND ITS RELEVANCE TO THE DISPOSAL OF SPENT NUCLEAR FUEL Robert Finch Rodney Ewing Department of Geology University of New Mexico Submitted to Svensk Kämbränslehantering AB (SKB) December 21,1990 ABSTRACT Uraninite is a natural analogue for spent nuclear fuel because of similarities in structure (both are fluorite structure types) and chemistry (both are nominally UOJ. Effective assessment of the long-term behavior of spent fuel in a geologic repository requires a knowledge of the corrosion products produced in that environment.
    [Show full text]
  • Lord Hill Quarry Town: Stoneham, Ox Ford County Base Map: Cen Ter Lovell 7.5’ Quadran Gle Con Tour in Ter Val: 20 Feet
    Lord Hill Quarry Town: Stoneham, Ox ford County Base map: Cen ter Lovell 7.5’ quadran gle Con tour in ter val: 20 feet Type of de posit: Gran ite peg matite. strunzite, to paz, torbernite/metatorbernite, triphylite(?), triplite, uraninite, uranophane, vivian it e, zircon (var. cyrtolite). Col lect ing sta tus: Locat ed in the White Mountai n Nati onal Forest . No perm ission is needed to collec t miner als here. How- Com ments: Lord Hill is one of the fa vor ite col lect ing sites in ever, collec ting must be non com mercia l, done with hand tools, Maine, offer ing a va riety of miner als and White Mountai n scen - and not greatly disturb the mine area. ery. The best-known finds from this local ity in clude large crys- tals of white topaz, and smoky quartz crystal s encrust ed by many Min er als ob served: albit e, almandine (garnet) , autun- small phenakite crys tals. Most col lect ing ac tiv ity ap pears to ite/meta-autun ite, beraunite, bermanite, beryllonite, bertrandite, have oc curred in the larger of the two quarry pits, al though a ma- beryl, bi o tite, bis muth, bis muthi nite, bismutite, cas sit er ite, jor pocket contai n ing smoky quartz and fluorapatite crystal s was columbite, cryptomelane, damourite, elbaite (tour maline) , opened in the floor of the smaller pit in 1991. The pieces of topaz eosphorite, fluorapatite, fluo rite, gahnite, goethite com monly found here are disti n guished by their bluish-whi te (pseudomorphic after pyrit e), goyazite, heterosite, hureaulite, color (es pe cially when wet), sin gle cleav age di rec tion, and hydroxylapatite, hydroxyl-herderite, microcline, microlite, higher den sity than sim i lar-look ing peg ma tite min er als.
    [Show full text]
  • Weeksite K2(UO2)2(Si5o13)·4H2O
    Weeksite K2(UO2)2(Si5O13)·4H2O Crystal Data: Monoclinic. Point Group: 2/m: As bladed or acicular crystals, flattened on {010} and elongated along [001], and as flat plates; also as spherulites and radiating fibrous clusters. - Twinning: By two-fold rotation around [401 ]. Physical Properties: Cleavage: Two good prismatic cleavages noted. Hardness = < 2 D(meas.) = ~ 4.1 D(calc.) = 3.80 Radioactive. Optical Properties: Transparent to translucent. Color: Yellow. Luster: Waxy to silky. Optical Class: Biaxial (-). α = 1.596 β = 1.603 γ = 1.606 2V(meas.) = ~ 60° 2V(calc.) = 66° Pleochroism: X = colorless, Y = pale yellow-green, Z = yellow-green. Dispersion: r > v, strong. Orientation: X = b, Y = c, Z = a. Cell Data: Space Group: C2/m. a = 14.26(2) b = 35.88(10) c = 14.20(2) β = 111.578(3)° Z = 4 X-ray Powder Pattern: Thomas Range, Utah, USA. 7.11 (10), 5.57 (9), 8.98 (8), 3.55 (7), 3.30 (7), 2.91 (6), 3.20 (5) Chemistry: (1) (1) Na2O 0.53 Al2O3 0.6 K2O 4.73 SiO2 29.44 CaO 0.67 UO3 55.78 BaO 3.11 H2O [7.02] MgO 0.18 Total 101.28 SrO 0.20 (1) Anderson mine, Arizona, USA; average of 8 electron microprobe analyses, supplemented by TGA, H2O calculated from structure, corresponds to (K1.031Na0.176Ca0.123Ba0.208)Σ=1.537(UO2)2.002 (Si5.030O13)·4H2O. Occurrence: In “opal" veinlets in rhyolite, agglomerates, sandstones and limestones. Association: “Opal," “chalcedony," calcite, gypsum, fluorite, uraninite, thorogummite, uranophane, boltwoodite, carnotite, margaritasite. Distribution: In the USA, in Utah, at the Autunite No.
    [Show full text]
  • Recovery of Gold and Iron from Cyanide Tailings with a Combined Direct Reduction Roasting and Leaching Process
    metals Article Recovery of Gold and Iron from Cyanide Tailings with a Combined Direct Reduction Roasting and Leaching Process Pingfeng Fu 1,2,* ID , Zhenyu Li 1, Jie Feng 1 and Zhenzhong Bian 1 1 School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing 100083, China; [email protected] (Z.L.); [email protected] (J.F.); [email protected] (Z.B.) 2 Key Laboratory of High-Efficient Mining and Safety of Metal Mines, Ministry of Education, Beijing 100083, China * Correspondence: [email protected]; Tel.: +86-10-6233-2902 Received: 25 June 2018; Accepted: 19 July 2018; Published: 21 July 2018 Abstract: Cyanide tailings are the hazardous waste discharged after gold cyanidation leaching. The recovery of gold and iron from cyanide tailings was investigated with a combined direct reduction roasting and leaching process. The effects of reduction temperature, coal dosage and CaO dosage on gold enrichment into Au-Fe alloy (FexAu1−x) were studied in direct reduction roasting. Gold containing iron powders, i.e., Au-Fe alloy, had the gold grade of 8.23 g/t with a recovery of 97.46%. After separating gold and iron in iron powders with sulfuric acid leaching, ferrous sulfate in the leachate was crystallized to prepare FeSO4·7H2O with a yield of 222.42% to cyanide tailings. Gold enriched in acid-leaching residue with gold grade of 216.58 g/t was extracted into pregnant solution. The total gold recovery of the whole process reached as high as 94.23%. The tailings generated in the magnetic separation of roasted products, with a yield of 51.33% to cyanide tailings, had no toxic cyanide any more.
    [Show full text]
  • Seznam Publikací Wos Q1 a Q2
    Přehled publikací pracovníků/studentů ÚGV PřF MU Brno v časopisech 1./2. kvartilu v období 2003-2021 2021 (celkem 22 článků, 7 studentů spoluautorů – červeně) Adameková, K., Lisá, L., Neruda, P., Petřík, J., Doláková, N., Novák, J., Volánek, J. (2021): Pedosedimentary record of MIS 5 as an interplay of climatic trends and local conditions: Multi-proxy evidence from the Palaeolithic site of Moravský Krumlov IV (Moravia, Czech Republic). Catena, 200, 105174. doi: 10.1016/j.catena.2021.105174 WoS: IF2020: 5,198; Q1 (12/98) in Water Resources; Q1 (7/37) in Soil Science; Q1 (22/199) in Geosciences, Multidisciplinary; počet citací: 1 Bábek, O., Kumpan, T., Calner, M., Šimíček, D., Frýda, J., Holá, M., Ackerman, L., Kolková, K. (2021): Redox geochemistry of the red „orthoceratite limestone“ of Baltoscandia: Possible linkage to mid-ordoviian palaeoceanographic changes. Sedimentary Geology, 420, 105934. doi: 10.1016/j.sedgeo.2021.105934 WoS: IF2020: 3,397; Q1 (7/48) in Geology; počet citací: 0 Bonilla-Salomón, I., Čermák, S., Luján, Á.H., Horáček, I., Ivanov, M., Sabol, M. (2021): Early Miocene small mammals from MWQ1/2001 Turtle Joint (Mokrá-Quarry, South Moravia, Czech Republic): biostratigraphical and palaeoecological considerations. Bulletin of Geosciences, 96, 1, 99–122. WoS: IF2020: 1,600; Q2 (27/57) in Paleontology; Q4 (157/199) in Geosciences, Multidisciplinary; počet citací: 0 Březina, J., Alba, D.M., Ivanov, M., Hanáček, M., Luján, Á.H. (2021): A middle Miocene vertebrate assemblage from the Czech part of the Vienna Basin: Implications for the paleoenvironments of the Central Paratethys. Palaeogeography, Palaeoclimatology, Palaeoecology, 575, 110473. WoS: IF2020: 3,318; Q2 (21/50) in Geography, Physical; Q1 (2/54) in Paleontology; Q2 (74/199) in Geosciences, Multidisciplinary; počet citací: 0 Čopjaková, R., Prokop, J., Novák, M., Losos, Z., Gadas, P., Škoda, R., Holá, M.
    [Show full text]
  • Iidentilica2tion and Occurrence of Uranium and Vanadium Identification and Occurrence of Uranium and Vanadium Minerals from the Colorado Plateaus
    IIdentilica2tion and occurrence of uranium and Vanadium Identification and Occurrence of Uranium and Vanadium Minerals From the Colorado Plateaus c By A. D. WEEKS and M. E. THOMPSON A CONTRIBUTION TO THE GEOLOGY OF URANIUM GEOLOGICAL S U R V E Y BULL E TIN 1009-B For jeld geologists and others having few laboratory facilities.- This report concerns work done on behalf of the U. S. Atomic Energy Commission and is published with the permission of the Commission. UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1954 UNITED STATES DEPARTMENT OF THE- INTERIOR FRED A. SEATON, Secretary GEOLOGICAL SURVEY Thomas B. Nolan. Director Reprint, 1957 For sale by the Superintendent of Documents, U. S. Government Printing Ofice Washington 25, D. C. - Price 25 cents (paper cover) CONTENTS Page 13 13 13 14 14 14 15 15 15 15 16 16 17 17 17 18 18 19 20 21 21 22 23 24 25 25 26 27 28 29 29 30 30 31 32 33 33 34 35 36 37 38 39 , 40 41 42 42 1v CONTENTS Page 46 47 48 49 50 50 51 52 53 54 54 55 56 56 57 58 58 59 62 TABLES TABLE1. Optical properties of uranium minerals ______________________ 44 2. List of mine and mining district names showing county and State________________________________________---------- 60 IDENTIFICATION AND OCCURRENCE OF URANIUM AND VANADIUM MINERALS FROM THE COLORADO PLATEAUS By A. D. WEEKSand M. E. THOMPSON ABSTRACT This report, designed to make available to field geologists and others informa- tion obtained in recent investigations by the Geological Survey on identification and occurrence of uranium minerals of the Colorado Plateaus, contains descrip- tions of the physical properties, X-ray data, and in some instances results of chem- ical and spectrographic analysis of 48 uranium arid vanadium minerals.
    [Show full text]