Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 7 of 7 for “"Laterites"”.
-
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 …
-
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 …
-
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 …
-
ΒΕΛΤΙΣΤΟΠΟΙΗΣΗ ΤΗΣ ΕΚΧΥΛΙΣΗΣ ΛΑΤΕΡΙΤΩΝ ΜΕ ΘΕΙΙΚΟ ΟΞΥ
… ATMOSPHERIC PRESSURE LEACHING OF NICKELIFEROUS LATERITES BY SULFURIC ACID IS AN ALTERNATIVE METHOD TO THE HIGH PRESSURE LEACHING. TWO TYPES OF ORES WERE STUDIED (SERPENTINIC, HEMATITIC) AND THE INFLUENCE OF VARIOUS PARAMETERS LIKE LEACHING TEMPERATURE, ACID CONSUMPTION, PULP DENSITY, PREHEATING …
-
Microwave Vacuum Carbothermic Reduction and Sulphidation of a Low Grade Nickeliferous Silicate Laterite Ore
… 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 incentive for the present research was to …
-
ΚΙΝΗΤΙΚΗ ΤΗΣ ΕΞΑΓΩΓΗΣ ΤΟΥ ΝΙΚΕΛΙΟΥ ΑΠΟ ΑΙΜΑΤΙΤΙΚΟ ΛΑΤΕΡΙΤΗ ΚΑΤΑ ΤΗΝ ΕΚΧΥΛΙΣΗ ΤΟΥ ΜΕ ΘΕΙΙΚΟ ΟΞΥ ΣΕ ΑΤΜΟΣΦΑΙΡΙΚΗ ΠΙΕΣΗ
IN THIS THESIS THE KINETICS 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, …
-
ΕΚΧΥΛΙΣΗ ΛΑΤΕΡΙΤΩΝ ΜΕ ΘΕΙΙΚΟ ΟΞΥ ΥΠΟ ΠΙΕΣΗ
THE EXTRACTION 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 …