The effect of pellet chemical composition and burning temperature on pellets’ properties of the Gol-e-Gohar hematite recovery plant was investigated in this study. Green pellets of different sodium hydroxide ratio and hydrated lime were prepared as well. Then the pellets were burnt in a muffle kiln under different temperature conditions. The Design Expert software was employed to explore ...

Introduction: The twin Mars Exploration Rovers (MER) Spirit and Opportunity have explored the Martian surface at Gusev Crater (GC) and Meridiani Planum (MP) for more that 1840 sols (more than 5 Earth years). Their science payload [1] includes instruments for mineralogical (Mössbauer (MB), Mini-TES, and Pancam) and chemical (APXS) analysis and a tool (RAT) for brushing and grinding rock surfaces...

Paleomagnetic studies in the Lachlan Orogen have indicated rotation of elements within it, but evidence for is limited and has significant statistical uncertainty. This study presents a detailed paleomagnetic investigation, assisted by X-ray analysis magnetic mineralogy middle Cambrian to lower Silurian sedimentary igneous rocks Victoria New South Wales. Four demagnetisation behaviours (types A...

DRI production in tunnel furnaces sometimes encounters an incomplete degree of reduction. A model is required to tackle heterogeneous reaction rates, crucible heat transfer, and oxide morphology. Herein, a three-phase proposed based on mass conservation kinetics, describe the reduction hematite magnetite crucibles. The was implemented via Fortran program using finite volume discretization, resu...

[1] Hole 1205A was drilled on Nintoku Seamount, which lies in the midportion of the Emperor Seamount Chain. This seamount was emergent 56 Myr ago but was submerged by 54 Ma, so the lavas have endured weathering in both subaerial and submarine environments. We have studied the petrology, mineralogy, and geochemistry of intercalated altered basalts, breccias, and soil samples recovered at Hole 12...

The eastern part of the Adelaide Geosyncline contains well preserved glaciomarine sequences of the Sturtian glaciation (:750–700 Ma) including calcareous or dolomitic siltstone, manganiferous siltstone, dolostone and diamictite units and the associated Braemar ironstone facies. The ironstone facies occurs as matrix to diamictites and as massive to laminated ironstones and comprises abundant Fe ...

Technological approaches to the use of diatomaceous earth as a raw material for creation composite adsorbents wastewater treatment from phosphate ions are analysed. It is shown that developed surface diatomite can be used create granular adsorbent, and iron (III) oxides (magnetite, goethite, lepidocrocite, ferrihydrite, hematite goethite) environmentally safe, cheap, economically feasible modif...

A study on the quantitative leaching of iron ore in hydrochloric acid solution has been undertaken. The elemental composition of the iron ore was also carried out using ICP-MS technique. The major elements in the iron ore include: Fe(66.7%); Al (0.2%); Si (5.2%); Ti (0.02%) and O (28.0%). Some traces of V, Ni, Zn, Ce, Cr, La, Y and Zr were also found. The effects of contact time, acid concentra...

Silver-alkali halides show two clearly distinguishable stages during their demixing process. The chemical demixing in the spinodal regime occurs on a shorter time scale than the subsequent relaxation of the lattice. The present work is embedded in the major question whether these findings can be transferred to completely different systems such as the spinels. The system magnetite (Fe 3 O 4)-her...

Introduction: Iron oxides/oxyhydroxides (FeOx) are present nearly everywhere on the surface of Mars [e.g. 1,2]. They are characterized in the visible/near-infrared (VNIR) region by a strong electronic absorption centered near 0.85-0.95 μm and additional absorptions that shape the character of the visible reflectance spectrum and their color [3,4]. The objective of this study is to measure the s...