Sökning: "magnetite"
Visar resultat 1 - 5 av 101 avhandlingar innehållade ordet magnetite.
1. Interaction of magnetite with soluble silicates and bentonite : implications for wet agglomeration of magnetite concentrate
Sammanfattning : Iron ore green pellets are produced by agglomeration of moist magnetite concentrates. The quality of green pellets is essential for the transportability and metallurgical benefits of the final product. LÄS MER
2. Dephosphorization of magnetite fines : surface reactions, flotation kinetics and fuzzy logic application
Sammanfattning : The primary objective of the research work presented in this thesis is to investigate the influence of chemical and operational variables on the apatite flotation kinetics and to establish a suitable model using traditional method and fuzzy logic. The thesis consists of three parts, i.e. LÄS MER
3. Surface Chemistry of Components on Aqueous Metal Working Fluids
Sammanfattning : The aim of the work presented in this thesis is to contribute to an increased knowledge regarding the basic surface chemistry of water based metal working fluids, in particular the relation between aggregational behaviour in solution and the formation of technical important adsorption layers of e.g. LÄS MER
4. Nanomagnetic and Micromagnetic Properties of Rocks Minerals and Sulphide Oxidation Products
Sammanfattning : Magnetic and related properties of rocks and products from oxidation of sulphide minerals have been investigated with magnetisation measurements (rocks and oxidation products), magnetic force microscopy (rocks), scanning electron microscopy (rocks and oxidation products), transmission electron microscopy (oxidation products), Mössbauer spectroscopy (oxidation products) and powder X-ray diffraction (oxidation products). The investigations have shown the following: During thermal oxidation of pyrite (cubic FeS2) and marcasite (orthorombic FeS2) in air, nano-crystals of a-Fe2O3 and g-Fe2O3 were formed. LÄS MER
5. A Study on Vanadium Extraction from Fe-V-P Melts Derived from Primary and Secondary Sources
Sammanfattning : Vanadium extraction methods were developed for iron-vanadium-phosphorus (Fe-V-P) melts derived from processing of V-bearing titanomagnetites and steel slags. Studies on phase relationships of V slags were carried out to provide important understanding of the extraction processes. LÄS MER