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Showing 1 to 20 of 20 for “"Laterite"”.
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Selective Reduction of Laterite Ore
The project studied reduction of garnieritic laterite ore with the aim to establish extent and rate of reduction of nickel, cobalt and iron oxides under different conditions, reduction mechanisms, and optimum conditions for selective reduction of nickel and cobalt oxides. Ore reduction with the …
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Slope Stability Of Laterite Soil Embankments
… embankments in areas were residual soils such as laterite is the dominant soil types. Laterite soils have the characteristics of losing its shear strength with time and in fully saturated conditions and its properties varies from region to region. The soil property is influenced by the chemical …
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Geology, mineralogy and geochemistry of the Cerro Matoso nickeliferous laterite, Córdoba, Colombia
The Cerro Matoso nickeliferous laterite, located in northern Colombia near the town of Montelibano, was developed in pre-Late Cretaceous ultramafic rocks consisting principally of slightly serpentinized harzburgite. The peridotite body is flanked by ferruginous sandy sediments with interbedded coal …
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Microwave Vacuum Carbothermic Reduction and Sulphidation of a Low Grade Nickeliferous Silicate Laterite Ore
… nickel demands, the feasible mining of nickel laterite deposits is imperative. Nickel laterites cannot be easily treated since the nickel is finely disseminated throughout the ore. Therefore, very expensive leaching and smelting processes are required to process nickel laterite ore. The …
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Nickel laterites, origin and climate
Nickel laterites account for ?40 % of global nickel production and contain 60 % of the world's total land based nickel resources. Despite the importance of these deposits published studies, detailing their morphology and formation processes are relatively few and the interaction of variables …
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Deep Eutectic Solvents for the Leaching of Cobalt from Oxide Ores
… from stratiform sediment-hosted (SSH) Cu and Ni laterite deposits, respectively. Conventional processing of these ores is currently extremely energy-intensive and/or utilises toxic mineral acids, whilst the high degree of variability of Co ore mineralogy and geochemistry makes its extraction …
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Lateritic palaeosols of N.E. Africa: a remote sensing study
… of lateritic palaeosols. The work centres on laterites, which are thin but important elements of the Phanerozoic stratigraphy of NE Africa. They immediately pre-date midOligocene flood basalts and, if mapped, can be used to delineate a flood basalt-Iaterite contact and define the pre-30 Ma …
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ΕΚΧΥΛΙΣΗ ΛΑΤΕΡΙΤΩΝ ΜΕ ΘΕΙΙΚΟ ΟΞΥ ΥΠΟ ΠΙΕΣΗ
… OF NICKEL AND COBALT FROM LOW GRADE GREEK LATERITE ORIS IS ACCELARATED AT CONDITIONS OF HIGH TEMPERATURE- PRESSURE. THE EXTRACTION VALUES REACH100% UNDER CONDITIONS OF 220-260 C TEMPERATURE, 40-60 BAR PRESSURE 2 H DURATION. NUTRALIZATION OF THE EFFLVENTS IS VERY SATISFACTORY. THE DESIGN OF …
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Evaluating the Potential of Scaling due to Calcium Compounds in Hydrometallurgical Processes
… the chemistry of calcium sulphate hydrates in laterite pressure acid leach (PAL) solutions, containing Al2(SO4)3, MgSO4, NiSO4, H2SO4, and NaCl at 25–250ºC. The database developed, utilized by the MSE model, was shown to accurately predict the solubilities of all calcium sulphate hydrates (and …
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ΚΙΝΗΤΙΚΗ ΤΗΣ ΕΞΑΓΩΓΗΣ ΤΟΥ ΝΙΚΕΛΙΟΥ ΑΠΟ ΑΙΜΑΤΙΤΙΚΟ ΛΑΤΕΡΙΤΗ ΚΑΤΑ ΤΗΝ ΕΚΧΥΛΙΣΗ ΤΟΥ ΜΕ ΘΕΙΙΚΟ ΟΞΥ ΣΕ ΑΤΜΟΣΦΑΙΡΙΚΗ ΠΙΕΣΗ
… OF NICKEL EXTRACTION FROM AN HEMATITIC-TYPE LATERITE DURING LEACHING WITH SULFURIC ACID IS STUDIED. AFTER THE LOCALISATION OF THE NICERAL PHASE WITH WHICH NICKEL IS CONNECTED, THE INFLUENCE OF THE MACROSCOPIC VARIABLES AFFECTING THE SYSTEM (CONCENTRATION, TEMPERATURE, ARTICLE SIZE) ON THE …
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Multivariate geostatistical simulation of compositional data using Principal Component Analysis
… Using a 6-dimensional data set from a Nickel-Laterite deposit, we demonstrate the difference between the proposed methodology and classical co-simulation. The statistics and the further validation of the back-transformed grades after PCA and Sequential Gaussian Simulation showed that the …
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U/He-chronologische Fallstudien an Eisen- und Manganerzen
… um ca.8 erniedrigten Helium-Index. Für vier Laterite von der Darling Range NE von Perth wurde ein konkordantes Alter von 10 Ma bestimmt. Die BGk-Ergebnisse sind vermutlich tektonisch die Lateritergebnisse klimatisch relevant. Die Manganminerale Braunit und Hausmannit weisen ähnliche, mäßige …
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The Structure Function Relationship of Silica Polyamine Composites
… MT, as well as synthetic high pressure leach laterite solutions.
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The Structure Function Relationship of Silica Polyamine Composites
… MT, as well as synthetic high pressure leach laterite solutions.
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Volcanic architecture of the Deccan Traps, western Maharashtra, India: an integrated chemostratigraphic and paleomagnetic study
… the palaeomagnetic reversal horizon and the laterite cap, shows that as much as 95m of topography occurred on the surface of the active Deccan lavas over a distance of approximately 20 km. The volcanic architecture is controlled by the morphology of small sheet lobes, large sheet lobes, and, …
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The sedimentology, palaeontology and stratigraphy of coastal-plain deposits at Hondeklip Bay, Namaqualand, South Africa
… be represented in the Namib Desert by the thick laterite capping Eocene sediments at Kakaoberg. Subsequently, the palaeochannel was exhumed and was ultimately filled by late Tertiary marine deposits. The marine deposits were laid down in shallowing-upwards sequences of the shore face environment. …
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The development of a geopolymer binder from the interbasaltic laterites of Northern Ireland
Over the last number of years, geopolymers and Alkali Activated Cementitious Materials (AACM) have been proposed as low carbon alternatives to Portland Cement, offering up to 80% reduction in CO¬2 emissions. Historically, geopolymer technology has focused on Ground Granulated Blastfurnace Slag …