Sökning: "Nickel Concentrate"

Hittade 3 uppsatser innehållade orden Nickel Concentrate.

  1. 1. Potential Use of Oxygen Depleted Air In Nickel Sulphide Flotation

    Master-uppsats, Luleå tekniska universitet/Mineralteknik och metallurgi

    Författare :Bianca Henriques Leal Andrade; [2018]
    Nyckelord :;

    Sammanfattning : Copper-nickel low grade ore deposits normally have complex mineralogy and process behaviour. Implementing an optimum process that is able to recover all the valuable minerals efficiently is challenging. One concentration strategy in mineral processing of copper-nickel sulphide ores is stage-wise flotation. LÄS MER

  3. 2. Leaching of Pyrrhotite from Nickel Concentrate

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Industriell miljö- och processteknik

    Författare :Filip Abrahamsson; [2017]
    Nyckelord :Leaching; Pyrrhotite; Nickel Concentrate; Pentlandite; H2SO4; sulfuric acid; non-oxidative; acid leaching; Lakning; Magnetkis; Nickelkoncentrat; Pentlandit; H2SO4; svavelsyra; icke-oxidativ; syralakning;

    Sammanfattning : Non-oxidative acid leaching of pyrrhotite from Kevitsa’s Ni-concentrate and methods to recover by-products, have been investigated. Selective dissolution of pyrrhotite (Fe1-xS, 0<x<0.25) can enrich the content of the valuable metals, such as Ni and Co, in the final concentrate and will reduce the amount of Fe and S sent to the smelters. LÄS MER

  4. 3. Extraterrestrisk och terrestrisk kromrik spinell i fanerozoiska kondenserade sediment

    Magister-uppsats, Lunds universitet/Geologiska institutionen

    Författare :Maria Nolvi; Gunilla Thorelli; [2006]
    Nyckelord :physical geography; condensed sediments; cyclic sedimentation; spherules; chrome spinels; extraterrestrial chromite; cyklisk sedimentation; kondenserade sediment; sfäruler; kromspineller; geomorphology; pedology; cartography; climatology; naturgeografi; geomorfologi; marklära; kartografi; klimatologi; extraterrestrisk kromit; Earth and Environmental Sciences;

    Sammanfattning : This study aims to assess the normal inflow of extraterrestrial chromite to Earth. The results from the investigation are compared to earlier studies of middle Ordovician Orthoceratite Limestone in which 1 - 3 extraterrestrial chromite grains ( >63 ƒÊm ) per kilogram limestone were found. LÄS MER