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Author : Ernest R. Cole
Publisher :
ISBN 13 :
Total Pages : 36 pages
Book Rating : 4.3/5 (91 download)
Download or read book Insoluble Anodes for Electrowinning Zinc and Other Metals written by Ernest R. Cole and published by . This book was released on 1981 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Ernest R. Cole
Publisher :
ISBN 13 :
Total Pages : 25 pages
Book Rating : 4.:/5 (86 download)
Download or read book Insoluble Anodes for Electrowinning Zinc and Other Metals written by Ernest R. Cole and published by . This book was released on 1981 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Arthur W. Flynn
Publisher :
ISBN 13 :
Total Pages : 94 pages
Book Rating : 4.:/5 (585 download)
Download or read book Insoluble Anodes in the Electrowinning of Zinc written by Arthur W. Flynn and published by . This book was released on 1940 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Daniela Rossetto de Menezes
Publisher :
ISBN 13 :
Total Pages : 129 pages
Book Rating : 4.:/5 (126 download)
Download or read book Performance Evaluation of Mixed Metal Oxide Anodes for Zinc Electrowinning written by Daniela Rossetto de Menezes and published by . This book was released on 2021 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt: The adoption of Mixed Metal Oxide (MMO)-coated anodes in zinc electrowinning cellhouses would provide energy savings and resolve operational issues related to lead corrosion by-products. But a major concern is that commercially available MMO anodes could deteriorate prematurely in typical zinc electrolytes, due to intense MnO2 deposition. In this context, the present study investigated the relationship that Mn2+ concentration in zinc electrolytes affects the characteristics of MnO2 deposits and, consequently, the integrity of three types of IrO2- bearing MMO anodes. For this purpose, firstly, an exploratory anode performance assessment was conducted to monitor the anode potentials and the MnO2 formation rates in the medium term, as a function of Mn2+ concentration. Then, scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were used to characterize the anode samples after 72-hour galvanostatic polarization tests at different Mn2+ concentrations. The results have suggested that MnO2 deposits developed different morphologies and induced different anode deterioration processes, depending on the Mn2+ concentration and the anode type. In particular, anodes type “D” were covered by MnO2 films that would easily chip off after reaching a critical thickness, thus producing induced stresses. According to SEM images, these MnO2 pieces detached take out MMO coating fragments adhered to them. Meanwhile, MnO2 clusters of elongated crystallites developed over anodes “E” and “F”, and they were found to induce ruptures throughout the MMO coatings. Considering these results and specific criteria to define the Mn2+ tolerance levels of these anodes, a financial analysis was proposed for screening the most suitable anode type for industrial use, based on both the anodic potential demonstrated and the manganese control strategy required for its satisfactory operation.
Author : Charles Ebenezer Abbey
Publisher :
ISBN 13 :
Total Pages : 148 pages
Book Rating : 4.:/5 (11 download)
Download or read book Improving Base Metal Electrowinning written by Charles Ebenezer Abbey and published by . This book was released on 2019 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In zinc electrowinning, Mn oxidizes to form MnO2 on Pb-Ag anodes, cell walls and pipes. MnO2 reduces anode corrosion but also leads to short circuits and maintenance issues. MnO2 is thought to interact with chloride ions and produce oxidized chlorine species. The interactions between Mn and Cl are not well understood. Bench scale experiments were conducted to investigate the effects of the manganese to chloride ratio on anode corrosion rate and electrolyte chemistry using rolled Pb-Ag anodes. Increasing the average Mn/Cl- ratio from ~7:1 to ~11:1 reduced the anode corrosion rate. Anode scales produced with Mn/Cl- ratios at or above 11:1 contained some [gamma]-MnO2 while scales formed with ratios less than 11:1 did not. In copper electrowinning, the effects of temperature, power outages and concentrations of cobalt and manganese on anode corrosion and current efficiency have not been well investigated. Benchscale tests were used to investigate these effects. Anode corrosion in all experiments was minimal probably due to the presence of at least 150 mg/L Co in each electrolyte. Cathode current efficiency typically ranged between 90 and 95% for the experiments. The range of power outage, temperature and concentrations of Mn and Co tested did not produce a significant effect on current efficiency. Anode potential estimation equations for industrial tankhouse operations where cobalt is added after solvent extraction and where cobalt concentration is naturally high due to the ores being processed were developed using lab scale tests. These models have been combined with other reported equations to calculate the energy consumption of electrowinning systems for Pb-Ca-Sn anodes in synthetic sulfuric acid electrolytes"--Abstract, page iv.
Author :
Publisher :
ISBN 13 :
Total Pages : 968 pages
Book Rating : 4.:/5 (891 download)
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 1282 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1982 with total page 1282 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Author :
Publisher :
ISBN 13 :
Total Pages : 1050 pages
Book Rating : 4.:/5 (31 download)
Download or read book Monthly Catalogue, United States Public Documents written by and published by . This book was released on 1983 with total page 1050 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 332 pages
Book Rating : 4.:/5 (334 download)
Download or read book Report of Investigations written by and published by . This book was released on with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Michael L. Free
Publisher : John Wiley & Sons
ISBN 13 : 1118371380
Total Pages : 273 pages
Book Rating : 4.1/5 (183 download)
Download or read book Electrometallurgy 2012 written by Michael L. Free and published by John Wiley & Sons. This book was released on 2012-05-09 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a symposium sponsored by The Metallurgy and Materials Society of CIM and the Hydrometallurgy and Electrometallurgy Committee of the Extraction and Processing Division of TMS (The Minerals, Metals & Materials Society) Held during the TMS 2012 Annual Meeting & Exhibition Orlando, Florida, USA, March 11-15, 2012
Author : Andrea E. Raddatz
Publisher :
ISBN 13 :
Total Pages : 566 pages
Book Rating : 4.3/5 (243 download)
Download or read book Report of Investigations written by Andrea E. Raddatz and published by . This book was released on 1981 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Supramaniam Srinivasan
Publisher : Springer Science & Business Media
ISBN 13 : 0387251162
Total Pages : 707 pages
Book Rating : 4.3/5 (872 download)
Download or read book Fuel Cells written by Supramaniam Srinivasan and published by Springer Science & Business Media. This book was released on 2006-05-05 with total page 707 pages. Available in PDF, EPUB and Kindle. Book excerpt: This concise sourcebook of the electrochemical, engineering and economic principles involved in the development and commercialization of fuel cells offers a thorough review of applications and techno-economic assessment of fuel cell technologies, plus in-depth discussion of conventional and novel approaches for generating energy. Parts I and II explain basic and applied electrochemistry relevant to an understanding of fuel cells. Part III covers engineering and technology aspects. The book is useful for undergraduate and graduate students and scientists interested in fuel cells. Unlike any other current book on fuel cells, each chapter includes problems based on the discussions in the text.
Author : Ronald B. Diegle
Publisher :
ISBN 13 :
Total Pages : 452 pages
Book Rating : 4.:/5 (44 download)
Download or read book Proceedings of the Symposium on Corrosion, Electrochemistry, and Catalysis of Metallic Glasses written by Ronald B. Diegle and published by . This book was released on 1988 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : United States. Bureau of Mines
Publisher :
ISBN 13 :
Total Pages : 646 pages
Book Rating : 4.3/5 ( download)
Download or read book List of Bureau of Mines Publications and Articles ... with Subject and Author Index written by United States. Bureau of Mines and published by . This book was released on 1987 with total page 646 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Sivaraman Guruswamy
Publisher : CRC Press
ISBN 13 : 9780824782474
Total Pages : 658 pages
Book Rating : 4.7/5 (824 download)
Download or read book Engineering Properties and Applications of Lead Alloys written by Sivaraman Guruswamy and published by CRC Press. This book was released on 1999-11-09 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focusing on the uses of lead in pure or alloy form for engineering applications, this text presents data on the physical, mechanical, corrosive, accoustic, damping and nuclear properties of lead and lead alloys. It organizes information according to alloy type in tables, graphs and text, and examines the processing of commercially available lead products, including casting, rolling, extrusion, machining, welding and mechanical joining techniques.
Author : United States. Bureau of Mines. Branch of Editorial Services
Publisher :
ISBN 13 :
Total Pages : 160 pages
Book Rating : 4.3/5 (91 download)
Download or read book List of Bureau of Mines Publications and Articles ... with Subject and Author Index written by United States. Bureau of Mines. Branch of Editorial Services and published by . This book was released on 1982 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : John Bockris
Publisher : Springer Science & Business Media
ISBN 13 : 1468437852
Total Pages : 632 pages
Book Rating : 4.4/5 (684 download)
Download or read book Comprehensive Treatise of Electrochemistry written by John Bockris and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 632 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is now time for a comprehensive treatise to look at the whole field of electrochemistry. The present treatise was conceived in 1974, and the earliest invitations to authors for contributions were made in 1975. The completion of the early volumes has been delayed by various factors. There has been no attempt to make each article emphasize the most recent situation at the expense of an overall statement of the modern view. This treatise is not a collection of articles from Recent Advances in Electrochemistry or Modern Aspects of Electrochemistry. It is an attempt at making a mature statement about the present position in the vast area of what is best looked at as a new interdisciplinary field. Texas A & M University J. O'M. Bockris University of Ottawa B. E. Conway Case Western Reserve University Ernest Yeager & M University Texas A Ralph E. White Preface to Volume 2 This volume brings together some dozen processes well known to the electro chemist and treats them according to their various degrees of importance. The production of hydrogen is one of the more important processes, particularly with respect to the prospects of a hydrogen economy. No one would doubt, however, that the most commercially important electrochemical processes at the present time are the production of aluminum and of chlorine. Each of these processes has a separate chapter devoted to it.
