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3 edition of The effect of oxidation on the flotation of chromite and associated minerals found in the catalog.

The effect of oxidation on the flotation of chromite and associated minerals

The effect of oxidation on the flotation of chromite and associated minerals

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Published by U.S. Dept. of Interior, Bureau of Mines in [Washington, D.C.?] .
Written in English

    Subjects:
  • Chromite -- Oregon -- Metallurgy,
  • Chromite -- Montana -- Metallurgy,
  • Olivine -- Oregon -- Metallurgy,
  • Olivine -- Montana -- Metallurgy,
  • Flotation

  • Edition Notes

    Statementby D.G. Kotlyar, W.K. Tolley, and D.A. Rice
    SeriesReport of investigations -- 9575, Report of investigations (United States. Bureau of Mines) -- 9575
    ContributionsTolley, W. K., Rice, David A.
    The Physical Object
    FormatMicroform
    Pagination10 p.
    Number of Pages10
    ID Numbers
    Open LibraryOL14988593M

    MINERAL OXIDATION A. N. WrwcuBu, S tamf ord Research Labor atories, American C y anamid' C omp any, S tamf ord, C onnecticut. Assrnecr Mineral oxidation is of two radically difierent kinds; one is the well known oxidation during weathering which involves addition of oxygen and the other is the little known oxi-File Size: KB.   A paper from Japan described the effect of hydrogen peroxide on the separation of copper sulfide minerals and arsenic-bearing copper minerals and there were papers from Germany and China describing the potential role of colloidal silica as a calcite depressant in scheelite flotation, and the adsorption mechanism of gallic acid/ pyrogallic acid.

    significant effect on any water quality parameter or on pore gas composition. INTRODUCTION Acid mine drainage (AMD) is a water pollution problem associated with the mining of coal and sulfide minerals. These mining activities expose pyrite to oxygen and water with the ensuing oxidation of pyrite resulting in AMD. Oxidation- Reduction Reactions Oxidation Numbers Types of Chemical Reactions Voltaic Cells Review Skills The presentation of information in this chapter assumes that you can already perform the tasks listed below. You can test your readiness to proceed by answering the Review Questions at the end of the chapter.

      The effect of site-directed mutagenesis of two highly conserved aspartate residues that play important structural and/or catalytic roles in both thioredoxins, and which could in principle play a role in proton transfer, on the pK(a) values of redox-linked acid dissociations (deduced from changes in slope of the E(m) versus pH profiles) has also Cited by: Online proceedings. Welcome to IMPC online articles. This publication contains a selection of articles carefully reviewed by a technical committee composed of experts from the can directly access the articles in this publication using the search box on the left.


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The effect of oxidation on the flotation of chromite and associated minerals Download PDF EPUB FB2

Get this from a library. The effect of oxidation on the flotation of chromite and associated minerals. [D G Kotlyar; W K Tolley; David A Rice]. Oxidation at deg. C increased chromite floatability above pH 5 to about 30%. In contrast, oxidation did not measurably affect olivine flotation.

This suggested that controlled oxidation may improve selectivity in the flotation of chromite from olivine. This concept was tested using a chromite gravity concentrate.

This study shows the potential for altering the selectivity in chromite flotation from gangue minerals using oxidation. The effect of oxidation was not as dramatic in the present study as in earlier tests. Additional fundamental studies would be required to adequately understand the effect of oxidation on chromite and olivine flotation.

The flotation of chromite from “slime fraction” of the gravity circuit of Kemi concentrator, Finland was studied. The main gangue minerals are chlorite, tremolite and talc.

Amines or fatty acid collectors are normally used for this sort of mineral by: 6. The Effect of Oxidation on the Flotation Behaviour of Nickel-CopperOres S Kelebek 1 ABSTRACT Surface oxidation is one of the most imponant factors that influence the flotation selectivity and recovery in the processing of complex sulphide ores.

It is an inherent part of surface chemical reactions that determineFile Size: KB. Surface oxidation of sulfide minerals, such as that found in the regions of a sulfide ore body near the water table, can have a significant impact upon flotation. Effect of surface oxidation on the flotation response of enargite in a complex ore system.

EDTA has been used to determine the extent of oxidation of minerals in the flotation pulps. It has the ability to extract metal oxidation products from the surfaces of minerals (Rao and Leja, ). Effect of oxidation on pyrite by: 4. "The effects of oxidation on the floation of chromite and olivine were studied in an effort to improve chromite recovery from domestic sources.

The flotation behavior of pure chromite, pure olivine, and a chromite gravity concentrate were investigate Cited by: 1. Hydrogen peroxide (H2O2) is a strong oxidizer that causes non-selective oxidation of sulfide minerals, and its influence on bismuth sulfide ores is not well-documented.

In this study, H2O2 was proposed as an alternative bismuthinite depressant, and its effect on a Mo-Bi-containing ore was intensively investigated by batch flotation tests.

Results showed that the addition of H2O2 Cited by: 3. The effect of surface oxidation of copper sulfide minerals on clay slime coating in flotation Article in Minerals Engineering 24(15) December.

ity. As the oxidation proceeds, the effect of oxidation becomes dominant Interestingly, an oxygen-nitrogen mixture (21 % oxygen, 79% nitrogen) at a ratio close to that of air causes a drastic decrease in flotation from the beginning itself, probably due to enhanced oxidation as a result of the absence of moisture in the Nz-Oz mixture.

Diao and. chromite pellets through further oxidation of the pellets during cooling stages of pellet manufacture. The results of further detailed studies on the pre-oxidation of chromite pellets and effects of these pre-treatments on subsequent reduction in CO gas are presented in the following sections.

Oxidation Microstructures. the minerals are present in a finely dispersed form. The suggested mechanisms for flotation of sulphloes with and without thiol collectors are reviewed. The effects of pretreatments, including oxidation, electrochemical polarization and surface heterogeneity are Size: 2MB.

OXIDATION OF SULFIDE MINERALS. GALENA, SPHALERITE AND CHALCOGITE H.F. STEGBR eup L.E. DESJARDINS Mineral Sciences Laboratories, Canada Centre lor Mineral and Energy Technology, Department ol Energy, Mines and Resources, Ottawa, Ontaio KIA OGI AssrRecr Samples of galena, sphalerite and cbalcocite wereFile Size: KB.

Reverse flotation of coal can be explained as a process where valuable minerals are depressed, while undesired and unhealthy minerals are floated with the help of some reagents. Nowadays, conventional enrichment method of coal could not achieve removing unhealthy minerals partially from internal structure of coal such as sulfur, Hg, Au, which propagate in air after burning.

Preface p. ix Glossary of Symbols p. xiii Abbreviations and Acronyms p. xvii 1 The Nature of High Temperature Oxidation p.

1 Metal Loss Due to the Scaling of Steel p. 1 Heating Elements p. 4 Protecting Turbine Engine Components p. 5 Hydrocarbon Cracking Furnaces p. 9 Prediction and Measurement p.

10 Rate Equations p. 15 Reaction /5(2). oxidation products increased with the decrease of particle sizes. The surface oxidization of galena was the greatest at pHfollowed by pH 12 and 9, which wereconsist with the result of XPS.

The micro-flotation results indicated that the effect of pH on the flotation recovery of galena enhanced with the reduction of particle Size: KB.

image processing software to understand the effect of oxidation on pyrite. • Establishing the effectiveness of a preparation step, with its origins from hydrometallurgical practice, to modify the flotation response of gold-rich pyrite and low gold pyrite so that the Au:S ratio of the final flotation concentrate can be : Joseph John.

This book consists of three distinct parts: part 1 provides detailed description of the chemistry used in mineral processing industry; part 2 describes theoretical aspects of the action of flotation reagents, while part 3 provides information on the use of reagents in over operating plants treating Cu, Cu/Zn, Cu/Pb, Zn, Pb/Zn/Ag, Cu/Ni and.

The intrinsic oxidation rate is a measure of the oxidation rate at the mineral surface controlled largely by the reactivity of the sulphide minerals. Ritchie found global oxidation rates to be insensitive to changes in the intrinsic oxidation rate, which suggested that oxygen diffusion is the dominant rate-limiting process for sulphide.

It is more common than not, for mineral processing studies to proceed via the examination of model flotation systems with the resulting data often lacking statistical verification. The resultant concentrates and tails may then be subjected to a restricted range of analyses, for diagnosis of the flotation behavior variations observed, that themselves bias the by: 5.Common Questions About Froth Flotation Process Technology.

Froth flotation is the use of the physical and chemical properties of the surface of the ore, the use of chemical separation of useful ore. In the process of froth flotation, useful minerals are separated by floating them in the foams, and the way of keeping gangue minerals in the pulp is called positive flotation, while .Full text of "Surface Chemistry of Froth Flotation [electronic resource]: Volume 1: Fundamentals" See other formats.