Download or read book Sulphuric Acid Oxygen Pressure Leaching of a Base metal Sulphide Ore written by G. J. Tegg and published by . This book was released on 1975 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Leaching of Low grade Base metal Sulphide Mattes to Produce Elemental Sulphur written by Bernard Verbaan and published by . This book was released on 1986 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dissolution of Valuable Metals from Nickel Smelter Slags by Means of High Pressure Oxidative Acid Leaching written by Ilya Perederiy and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydrochloric Acid oxygen Leaching and Metal Recovery from a Copper nickel Bulk Sulfide Concentrate written by Gary A. Smyres and published by . This book was released on 1985 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cl2 O2 Leaching of Massive Sulfide Samples from the Southern Juan de Fuca Ridge North Pacific Ocean written by and published by . This book was released on 1983 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Leaching of Zinc Containing Sulphide Minerals written by and published by . This book was released on 1981 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A process - an improvement on that described in our patent No. 800224 - for treating zinc sulphide materials ( and recovering at least some of sulphide as elemental sulphur) wherein the sub-divided material is firstly leached, under pressure at less than 119 degrees C, with a sulphate leach solution low in sulphuric acid and having a high iron content together with zinc and impurities in a manner causing iron to precipitate and subsequently leaching the residue and redissolving the iron precipitate with spend electrolyte containing regenerated sulphuric acid resulting from the treatment of the leach liquor obtained from the first leach step and wherein the leach solution from the subsequent leach step constitutes the starting leach solution for the first leach step. The second leach step is carried out in two stages; a first leach stage conducted at elevated pressure and elevated temperature (less than 119 degrees C - ie below the melting point of sulphur) in the presence of oxygen and a second stage at atmospheric pressure and without the supply of free oxygen to the leach solution.
Download or read book Weathering of a Base metal Sulfide Leaching Residue written by Thomas G. Carnahan and published by . This book was released on 1982 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Chlorine oxygen Leaching of a Low grade Zinc Sulfide Flotation Concentrate written by Gary A. Smyres and published by . This book was released on 1985 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Final Report Concerning the Solubility of Oxygen in Sulfuric Acid zinc Pressure Leaching Solutions written by and published by . This book was released on 1991 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigation for a systematic study of oxygen equilibrium data for the analysis of the pressure leaching process for the recovery of zinc from sulfide concentrates. The solubilities of oxygen were measured at 95C, 125C, 155C, and 185C for three partial pressures of oxygen (4 atm, 7 atm, 10 atm) and for aqueous sulfuric acid solutions containing zinc and iron sulfate salts. A two-stage program for solubility determinations, consisting of a high pressure, high temperature absorption step and a low pressure (atmospheric) desorption step at 50C, was developed and data is reported on oxygen solubilities in the various solutions at 50C and atmospheric pressure. Oxygen solubilities were also measured in a concentrated zinc sulfate solution containing 0.3 g/L of surfactant Lignosol, and in an industrial sample obtained from the pressure leaching unit of Cominco at Trail, B.C.
Download or read book Leaching Process for Metal Sulphide Containing Minerals written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A process for the treatment of zinc sulphide containing concentrates by leaching at lower pressures and temperatures than existing processes (Sherritt Gordon) but nevertheless has acceptable kinetics for industrial applications. The following steps are involved: 1. Contacting pulverised zinc sulphide containing material with an aqueous leach solution containing zinc, 5 to 50 gpl iron and a maximum of 20 gpl sulphuric acid, and at a temperature between 70 degrees C and 119 degrees C. (Note MP of sulphur is 119 degrees C) as the zinc dissolves iron precipitates. 2. Separate the leach liquor from the solids. 3. Purify the leach liquor from 2 as necessary and electrowin most of the zinc leaving a spent electrolyte containing regenerated sulphuric acid. 4. Contact the solids from 2 with the spent electrolyte from 3 causing re-dissolution of the iron precipitate and further leaching of zinc and other metal impurities. 5. Separate the solids and liquids from 4. 6. Utilising the leach solution from 5 as a major portion of the leach solution for step 1. By controlled conditions in leach 1 the zinc mineral-sphalerite - effectively acts as a neutralising agent enabling the iron to be precipitated from the solution. Zn + Fe2 (SO4) -- ZnSO4 + 5 degrees + 2FeSO4 (Eq 1). 2FeSO4 + 1/2O2 + H2SO4 -- Fe2(SO4)3 + H2O (Eq 2). 2FeSO4 + 1/2O2 + 3H2O -- 2 FeOOH + 2H2SO4 (Eq 3). 2FeOOH + 3H2SO4 -- Fe2(SO4)3 + 4H2O (Eq 4). Precipitation of iron (Eq 3) is associated with the production of sulphuric acid and only proceeds to equilibrium if conditions are correctly selected. Equations 1, 2 and 3 can be made to occur simultaneously and the iron precipitating as a filterable Goethite, which easily re-dissolves in return electrolyte.
Download or read book Oxidation Leaching of Copper Sulfides in Acidic Pulps at Elevated Temperatures and Pressures written by Martin H. Stanczyk and published by . This book was released on 1963 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Extraction 2018 written by Boyd R. Davis and published by Springer. This book was released on 2018-08-18 with total page 2976 pages. Available in PDF, EPUB and Kindle. Book excerpt: This three volume set presents papers from the first collaborative global metallurgy conference focused exclusively on extractive topics, including business and economic issues. Contributions examine new developments in foundational extractive metallurgy topics and techniques, and present the latest research and insights on emerging technologies and issues that are shaping the global extractive metallurgy industry. The book is organized around the following main themes: hydrometallurgy, pyrometallurgy, sulfide flotation, and extractive metallurgy markets and economics.
Download or read book Recent Advances in the Development of Hydrometallurgical Processes for the Treatment of Base metal Sulphides written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper deals with the hydrometallurgical treatment of base- metal sulphides (specifically copper, zinc, and lead) from materials in which precious metals, mainly silver and gold, may be present in significant amounts. Most of the research-and-development effort devoted to this matter in the past twenty years has been confined to two broad types of processes that are characterized by the kind of oxidizing agent used to leach the metal sulphide, namely, chlorine and oxygen. The processes of the first category use a chloride medium for the leaching, purification, and recovery of the metal values. The second type of process includes the ammoniacal leaching of sulphides, pressure leaching with air at low temperature, and pressure leaching with oxygen at high temperature. In all these processes, the metal sulphides are converted into metal sulphates. The paper introduces some recent advances in this field. Several processes for the production of zinc, lead, and copper are described in detail, including some experimental results. These are presented as examples of process development in hydrometallurgy based upon recent advances in solvent extraction and electrowinning.
Download or read book Recent Advances in Mineral Processing Plant Design written by Deepak Malhotra and published by SME. This book was released on 2009 with total page 587 pages. Available in PDF, EPUB and Kindle. Book excerpt: A compilation of engaging and insightful papers from the prestigious 2009 Plant Design Symposium, the volume is a sequel to Mineral Processing Plant Design, Practice, and Control, an industry standard published in 2002. Both books are indispensable texts for university-level instruction, as well as valuable guides for operators considering new construction, plant renovation, or expansion. You'll learn the role of innovation, how to finance and conduct feasibility studies, and how to reduce your plant's carbon footprint.
Download or read book Hydrometallurgy 94 written by Institution of Mining & Metallurgy and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 1146 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrometallurgy '94 contains the 78 papers that were presented at the international symposium organized by the Institution of Mining and Metallurgy and the Society of Chemical Industry and held in Cambridge, England, in July 1994. In the papers specific attention is paid to the concept of sustainable development and the associated ideas of cleaner technology, recycling and waste minimization that have particular relevance to the extractiona nd processing of metals and other mineral products. The papers, by authors from 30 contries, are grouped under the headings: Hydrometallurgy and Sustainable Development; Materials Production and the Environment; Fundamentals; Leaching; Bioprocessing; Gold Solution Purification; Effluent Treatment; Processes; and Recycling.
Download or read book The Solubilities of Oxygen in Sulphuric Acid Solutions Containing Cupric And or Nickel Sulphate at Atmospheric and High Pressures written by Hanning Li and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The solubilities of oxygen in aqueous solutions, containing sulphuric acid and copper or nickel sulphate, play an important role in a hydrometallurgical process for the recovery of copper called "pressure leaching."
Download or read book Recent Advances in the Leaching of Sulphides and the Precipitation of Iron written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in the leaching of sulphide concentrates and in the associated area of iron precipitation are examined. Sherritt Gordon's technology of pressure leaching with oxygen and sulphuric acid is being applied commercially to zinc concentrates. A Zn recovery of over 98 per cent is achieved, and the associated pyrite is largely unaffected; elemental sulphur is the principal sulphidic product. Leaching processes with ferric chloride or cupric chloride, or both, are being applied to a wide variety of sulphide concentrates. Duval's CLEAR cupric chloride leach process for copper concentrates has been evaluated at the demonstration-plant scale, and many other processes using FeCl3 or CuCl2, or both, for copper have been piloted. Several chloride leaching processes for lead or pyritic zinc concentrates have also been tested successfully at the pilot level. All the processes stress the advantages of the formation of elemental sulphur and the relative lack of pyrite attack. Equally important advances have been made in the elucidation of the fundamental leaching reactions involved. Technologies for the precipitation of jarosite, goethite, and hematite are being used routinely for the control of iron in both sulphate and chloride media, and efforts are currently being made to control metal losses (Pb, Zn, Cu, Ag, etc.) associated with these precipitates. Although ongoing research has clarified many aspects of iron precipitation, it has yet to find large-tonnage uses for the various iron precipitates.
