CHAPTER 1 GENERAL INTRODUCTION 1.1 Introduction 1.2 Literature Review l.2.1 A Brief Description of Iron and Steelmaking Processes 1.2.2 Industrial Process of Iron Ore Sintering 1.2.3 Thermal and Chemical Processes during Sintering 1.2.4 Sinter Mineralogy 1.2.5 Utilization of New Zealand Ironsand by Iron Ore Sintering 1.2.6 Utilisation of Mill Scale by Iron Ore Sintering 1.2.7 Recycling of Iron and Steel Making Dusts 1.2.8 Summary and Objectives 1.3 Experimental Methods 1.3.1 Sample Preparation for Morphology 1.3.2 Optical Microscopy 1.3.3 Determination of the Volumetric Fractions of Mineral Phases 1.3.4 Scanning Electron Microscopy/Energy Dispersive X-ray Spectroscopy 1.3.5 Qualitative and Quantitative X-ray Diffraction 1.3.6 Electron Probe Microanalysis 1.3.7 Carbon Content Analysis 1.3.8 Inductively Coupled Plasma-Optical Emission Spectrometry 1.3.9 Control of Oxygen Partial Pressure of Sintering Atmosphere References CHAPTER 2 UTILIZATION OF NEW ZEALAND IRONSAND (TITANOUAGNETITE) BY IRON ORE SINTERING 2.1 Introduction 2.2 Experimental Procedure 2.2.1 Raw Materials and Preparation 2.2.2 Bench-scale Sintering 2.2.3 Characterisation of Raw Materials and Sintered Samples 2.3 Results 2.3.1 Characterisation of the Ironsand 2.3.2 Characterization of Relict Ironsand in Industrial Sinter 2.3.3 Bench-scale Sintering of Iron Ore Mixes Containing New Zealand Ironsand 2.4 Discussion 2.5 Conclusion References CHAPTER 3 EFFECT OF SINTERING CONDITIONS ON THE FORMATION OF MINERAL PHASES DURING IRON ORE SINTERING 3 1 Introduction 3.2 Experimental Procedure 3.2.1 Sample Preparation 3.2.2 Sintering 3.2.3 Microstrueture Analysis 3.3 Experimental Results 3.3.1 Effects of Sintering Temperature and CaO/SiO2 Ratio 3.3.2 Effect of Sintering Gas Atmosphere 3.3.3 Effect of Oxidation during Cooling
3.4 Discussion 3.5 Conclusions References CHAPTER 4 INTERACTION BETWEEN NEW ZEALAND IRONSAND (TITANOMAGNETITE) AND FLUX MATERIALS 4.1 Introduction 4.2 Experimental Procedure 4.2.1 Sample Preparation 4.2.2 Sintering 4.2.3 Microstructure Analysis 4.3 Results and Discussion 4.3.1 Interaction between Ironsand and MgO 4.3.2 Interaction between Ironsand and CaO 4.3.3 Interaction between Ironsand and Dolomite 4.4 Conclusions References CHAPTER $ UTILIZATION OF MILL SCALE BY IRON ORE SINTERING 5.1 Introduction 5.2 Experimental Procedure 5.2.1 Sintering Experiments 5.2.2 Interaction Experiments 5.3 Experimental Results 5.3.1 Characterization of Mill Scale 5.3.2 Formation of Mineral Phases during Sintering 5.3.3 Interaction between Mill Scale and Other Components 5.g Discussion 5.5 Conclusions References CHAPTER 6 UTILIZATION OF FILTER CAKE WASTES BY IRON ORE SINTERING 6.1 Introduction 6.2 Experimental Procedure 6, 3 Results 6.3.I Characterisation of Filter Cake Samples 6.3.2 Sintering of Filter Cake Samples 6.3.3 Zinc Removal from Filter Cake Samples 6.4 Discussion 6.4.1 Mineral Phase Formation 6.4.2 Zinc Removal 6.5 Conclusions References CHAPTER 7 CONCLUSIONS 7.1 Utilization of New Zealand Ironsand (Titanomagnetite)by Iron Ore Sintering 7.2 Effect of Sintering Conditions on the Formation of Mineral Phases during Iron Ore Sintering 7.3 Interaction between New Zealand Ironsand(Titanomagnetite) and Flux Materials 7.4 Utilization of Addition of Mill Scale by Iron Ore Sintering
7.5 Utilization of Filter Cake Wastes by Iron Ore Sintering
[