Download or read book The Role of Oxygen in Xanthate Flotation of Galena Pyrite and Chalcopyrite microfilm written by I.B. Klymowsky and published by . This book was released on 1970 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Role of Oxygen in Xanthate Flotation of Galena Pyrite and Chalcopyrit written by Irenej Boris Klymowsky and published by . This book was released on 1968 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Conceptual Model for the Role of Oxygen in Xanthate Adsorption on Galena written by Edwin E. Maust and published by . This book was released on 1976 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Surface Chemistry of Froth Flotation written by Jan Leja and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt: The process of froth flotation is an outstanding example of applied surface chemistry. It is extensively used in the mining, mineral, metallurgical, and chemical industries for separation and selective concentration of individual minerals and other solids. Substances so concentrated serve as raw materials for producing appropriate metals and chemicals. The importance of flotation in technology is chiefly due to the ease with which it can be made selective and versatile and to the economy of the process. The objective of this book is to review the fundamentals of surface chemistry together with the relevant aspects of organic and inorganic chemistry that-in the opinion of the author-are important ~ control of the froth flotation process. The review updates the information that had been available in books by Sutherland and Wark (1955), Gaudin (1957), Klassen and Mokrousov (1963), and GIembotsky et al. (1963). It emphasizes mainly the surface chemical aspects of the process, leaving other relevant topics such as hydrodynamics, mechanical and electrical technology, cir cuit design and engineering, operations research, instrumentation tech nology, modeling, etc., to appropriate specialized treatments.
Download or read book Electrochemistry of Flotation of Sulphide Minerals written by Yuehua Hu and published by Springer Science & Business Media. This book was released on 2010-06-30 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Electrochemistry of Flotation of Sulphide Minerals" systematically covers various electrochemical measurements, especially electrochemical corrosive methods, electrochemical equilibrium calculations, surface analysis, semiconductor energy band theory as well as molecular orbital theory. Behaviour and mechanism of collectorless and collector-induced flotation of sulphide minerals in various flotation systems are also discussed. The example of electrochemical flotation separation of sulphide ores shows an industrial application. Prof. Yuehua Hu is a professor at the School of Minerals Processing & Bioengineering of Central South University and Vice Chairman of the Mineral Processing Committee of the China Nonferrous Metals Society. Dr. Wei Sun is an associate professor at the School of Minerals Processing & Bioengineering of Central South University. Prof. Dianzuo Wang is both a member of Chinese Academy of Sciences and Chinese Academy of Engineering, and a foreign associate of the National Academy of Engineering (USA).
Download or read book The Interactive Effects of the Sulphite Ion PH and Dissolved Oxygen on the Flotation of Chalcopyrite and Galena from Black Mountain Ore written by and published by . This book was released on 1985 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: These effects were investigated in batch flotation studies, and by the measurement of rest and pulp potentials. At low additions of sulphurous acid as the pH regulator, flotation rate increased with increasing concentrations of dissolved oxygen. The recovery of chalcopyrite dropped significantly below a pH value of about 6,5 at 25 ppm of dissolved oxygen, and below a pH value of about 6 at a dissolved-oxygen concentration of 8,2 ppm. The rest and pulp potentials measured indicated that dixanthogen is the dominant species formed on chalcopyrite surfaces during flotation with sodium ethyl xanthate. The results suggested that the same species might have formed on galena surfaces in the pulp after the ore had been milled in a ceramic mill under nitrogen. Increased additions of sulphurous, sulphuric, and hydrochloric acids increased the rest potentials, while the addition of sodium sulphite decreased these potentials.
Download or read book Electronic Structure and Surfaces of Sulfide Minerals written by Jianhua Chen and published by Elsevier. This book was released on 2020-04-23 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt: Electronic Structure and Surfaces of Sulfide Minerals: Density Functional Theory and Applications examines the mineral structure and electronic properties of minerals and their relationship to mineral floatability by density functional theory (DFT). This pragmatic guide explores the role of minerals in flotation by focusing on the mineral surface structure, electronic properties, and the adsorption of flotation agents through the study of the microscopic mechanism of reagents from the structure and properties of minerals. The flotation mechanism is explained from the point-of-view of solid physics, which is of great significance for both theoretical research and practical applications. The study of the structure and properties of the minerals can reveal the essential nature of mineral flotation, hence why minerals have floatability, the mechanism of response of different minerals to different chemicals, and the origin of the selectivity of flotation agents. - Discusses the relationship between mineral properties and floatability in terms of crystal structure, atomic coordination structure and electronic properties - Covers the influence of the surface structure of the mineral on surface charge distribution, reactivity and electron density, including a quantitative calculation method for the atomic reactivity of the mineral surface - Includes research on the microstructure and mechanism of reagent molecules adsorption on the surface of minerals, focusing on the interactions between water molecules, oxygen molecules and reagents
Download or read book CIM Bulletin written by Canadian Institute of Mining and Metallurgy and published by . This book was released on 1997 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions written by and published by . This book was released on 1970 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quarterly Bulletin of the Canadian Mining Institute written by Canadian Institute of Mining and Metallurgy and published by . This book was released on 1970 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flotation of Sulphide Minerals written by and published by . This book was released on 1985 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings Twelfth Congress of the Council of Mining and Metallurgical Institutions Johannesburg South Africa 3rd 7th May 1982 written by Council of Mining and Metallurgical Institutions. Congress and published by . This book was released on 1982 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Coal and Mineral Processing Using Flotation written by S. Chander and published by . This book was released on 1989 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Transactions written by Canadian Institute of Mining and Metallurgy and published by . This book was released on 1970 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt: Vols. for 1918- include the Transactions of the Mining Society of Nova Scotia.
Download or read book Interactions Between Sulphide Minerals and Xanthates 1 The Formation of Monothiocarbonate at Galena and Pyrite Surfaces written by and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The rate of decomposition of potassium ethyl monothiocarbonate has been determined at pH values between 5 and 10, and its molar absorptivity at 221 nm determined to be 1.24x10000 mol/cm. A novel apparatus for use in the study of reactions between sulphide minerals, oxygen and thiol reagents has been developed, and applied to the reactions of potassium ethyl xanthate with galena and pyrite. It has been shown that both minerals react with ethyl xanthate in the presence of oxygen or oxidation products to form soluble as well as adsorbed xanthate derivatives. The soluble derivative has been identified to be ethyl monothiocarbonate. The adsorbed xanthate at a galena surface, unlike that at a pyrite surface, is gradually converted to a soluble monothiocarbonate under the action of dissolved oxygen. The effect of variables such as pH, the initial xanthate and oxygen concentrations, and the initial state of oxidation of the mineral on the formation of monothiocarbonate has been studied. It is tentatively proposed that an intermediate adsorbed mixed xanthate-hydroxide species is involved in the formation of monothiocarbonate at both galena and pyrite surfaces. The significance of the formation of monothiocarbonate to flotation practice is discussed briefly. The formation of monothiocarbonate represents a wastage of reagent, and could lead to a decrease in flotability of xanthated galena with time of exposure to aerated solutions. (AUAB).
Download or read book Minerals Science and Engineering written by E. H. Wainwright and published by . This book was released on 1977 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Broken Hill Conference 1983 written by Australasian Institute of Mining and Metallurgy. Conference and published by . This book was released on 1983 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt:
