In situ crystallization of Fe-Ti oxides in the Bijigou layered

The genesis of magmatic Fe-Ti-(V) oxide deposits in layered intrusions is closely related to chemical evolution of basaltic magmas and dynamic processes in crustal magma …

Chemical beneficiation of chromite ore to improve the …

The Cr/Fe ratio of the untreated ore is indicated by a black cross as a marker. From Fig. 8 it is observed that the increase in the level of pre-reduction as a result of pre-oxidation at different temperatures and retention times had a positive effect on improving the Cr/Fe ratio of the ore. It was expected that leaching the un-agglomerated pre ...

Platinum-group element geochemistry of the Zhuqing Fe-Ti-V oxide ore

Platinum-group element (PGE) geochemistry combined with elemental geochemistry and magnetite compositions are reported for the Mesoproterozoic Zhuqing Fe–Ti–V oxide ore-bearing mafic intrusions in the western Yangtze Block, SW China. All the Zhuqing gabbros display extremely low concentrations of chalcophile elements and PGEs. The oxide …

Effects of Al and Fe on the metastable phase and …

Fe atom is located in the center of 1Mo-1Fe supercell in Fig. 2 (c) due to the negative mixing enthalpy of Ti-Fe (ΔH Ti-Fe = −17 kJmol-1) [40]. Ti atom is located at the positions of second and third nearest-neighbors, while Mo atom is located at the position of fourth nearest-neighbor.

Fundamentals of Silico-Ferrite of Calcium and Aluminium (SFCA) Iron Ore

The effects of Ti on the crystallisation during cooling of complex Ca-rich ferrite iron ore sinter bonding phases SFCA and Fe-rich SFCA was investigated using in situ synchrotron X-ray diffraction.

Effects of sodium salts on reduction roasting and Fe-P …

Effects of sodium salts on reduction roasting and Fe-P separation of high-phosphorus oolitic hematite ore were studied in the process of coal-based direct reduction followed by wet magnetic ...

Sintering Characteristics of Titanium Containing Iron …

The effect of Ti-oxide on the sintering behaviour of iron ore has been studied by doping pure TiO 2 to a sinter blend in laboratory tests. The results showed a considerable effect of TiO ... Chemical composition of the high-grade hematite ore used in this work. Element Fe SiO2 Al2O3 PCaOTiO2 Mn Wt% 65.14 1.66 1.35 0.04 0.08 0.04 0.69 Fig. 1.

Separation and recovery of V, Ti, Fe and Ca from acidic …

1. Introduction. Vanadium-titanium magnetite ore is one kind of typical metal mineral resources, which has a very high comprehensive utilization value due to due to the high content of V, Ti and Fe, etc. [1], [2].In China, more than 85% of vanadium and 90% of titanium originate from Vanadium-titanium magnetite ore of Panzhihua region in Sichuan province [3].

Effect of Ti content on microstructure evolution and …

In this study, we investigated the effect of Ti content on the microstructure, mechanical and damping properties of FeCoNi-based multi-principal element alloys. A series …

The effect of carbon source and molar ratio in Fe–Ti–C …

Fig. 2 (a) and (b) shows the XRD analysis curve of TiC/Fe composites using CNTs and CBs as carbon source in different reaction system. It can be seen that in all systems, the reaction products are very pure, and only α-Fe and TiC two phases exist, which shows that there is no residual C and Ti elementary phases that do not participate in the reaction and the …

Association of cumulus apatite with compositionally unusual …

Supports for this new model include the observed upward decrease in plagioclase An contents coupled by lack of significant change in original olivine Fo contents in the Fe-Ti oxide ore-bearing sequence below the apatite-rich horizon, which is in turn supported by the facts that Fe-Ti oxide crystallization has a counter effect on MgO/FeO, but no ...

Efficient Acid Leaching of Low Carbonate Copper Oxide Ore: …

Recent focus on hydrometallurgical methods for non-sulfide copper ores prompted a study on leaching a copper oxide ore containing 2.22% Cu, 44.9% SiO2, 6.94% Al, 6.61% Fe, 6.25% Mg, 3.67% Ca, and 1.7% Na with H2SO4 for gaining insight into the behavior of impurities in the leaching process. The effects of leaching time (30–180 min), acid concentration (0.25–2 …

Sequential microwave roasting and magnetic separation for removal of Fe

The microwave-treated sample was magnetically separated, and the Fe and Ti contents in the magnetic fraction increased to 7.25 and 3.99 wt%, respectively, indicating that 86.3% of the Fe and 68.3% of the Ti were removed from the pyrophyllite ore.

Metal concentrations and biological effects …

The tailings are formed by fine particulate material with large amounts of Fe, Al, Mn, Ti, rare earth metals and toxic metals. ... containing mine ore also accumulated metals in muscle tissue ...

Effect of alumina and silica content in the calcium

Effect of alumina and silica content in the calcium aluminosilicoferrite Ca 2 (Ca,Fe,Mg) 6 (Fe,Si,Al) 6 O 20 bonding phase on the strength of iron ore sinter. ... Zaporozhskiy ore was added to the SiM-F mixture to maintain a low silica level. For the sintering of the SiM-A mixture, alumina was added in the form of powder chemical ( −0.063 ...

The effects of contrasting Ti and Al activities on Mn/Fe …

The effects of contrasting Ti and Al activities on Mn/Fe systematics in pyroxene from lunar mare basalts James J. Papike; James J. Papike Institute of Meteoritics, Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131, U.S.A ... For lunar mare basalts, the effect of Ti activity on the occupancy of ...

Effect of sintering temperature on the microstructure and …

The effects of sintering temperature on the Ti/W–C phase evolution, microstructural change and wear properties of Fe-based composites were studied. ... Fe, Ti, W and C no longer exists in the original individual form with the increase of sintering temperature. The element of C has been completely uniformly dissolved in composites, while the ...

Effects, uptake, translocation and toxicity of Ti-based …

More than 90% of world Ti comes from ilmenite mineral ore. Ti is mobile in soil [120]. This possibly justify the uptake of both Fe and Ti, there interaction and adaptation of plants to soil containing weathered ilmenite. However, due to relative abundance of Fe, biological functions, uptake and translocation in plants it is considered as ...

Ferrous iron oxidation under acidic conditions – The effect …

The kinetics of homogeneous Fe(II) oxidation in aqueous solutions with 5 < pH < 9, typical of most natural waters, can be described using the pH dependent expression shown in Eq. (2) (Stumm and Lee, 1961, Sung and Morgan, 1980, Millero et al., 1987).This equation indicates that the rate of ferrous iron oxidation increases by two orders of magnitude for every …

Quantitative Analysis of Iron and Silicon Concentrations in Iron Ore

The effect of the compaction of Fe ore concentrate on the pXRF readings was also evaluated. Based on high correlations between pXRF readings and certified elemental data reported using XRF, OLS calibration equations were built and used to directly predict unknown samples. Results indicated that the OLS calibrations can substantively improve ...

Effects of fluid-induced oxidation on the composition of …

Textural relationships and mineral compositions of Fe-Ti …

Fe-Ti oxide ore bodies mainly occur in the lower part of the intrusion (MGZ, LZ, and MZa) ... The effect of pressure on the Panzhihua intrusion variation can be negligible as all plagioclase grains likely crystallized from the same magma chamber. Injection of more primitive magma and subsequent mixing process may increase the temperature and ...

The effect of Fe-Mn minerals and seawater interface and …

Comprehensive studies showed that ore-forming elements in the interface between seawater and the Fe-Mn minerals in the submarine ferromanganese crusts and nodules employed the following enrichment mechanisms: (1) the metal ion complexed with the surface hydroxyl of Fe-Mn minerals to form hydroxyl complexes, which were connected by coordination ...

Effect of Ca and Ti contents on characteristics of inclusions in Fe…

The inclusion characteristics in 55SiCr spring steel with different contents of titanium and calcium were investigated. The chemical compositions of steel samples were detected by inductively coupled plasma optical emission spectrometer, and the inclusion characteristics was determined by field emission scanning electron microscopy (FE-SEM) and energy-dispersive …

Recovery of Fe, V, and Ti in modified Ti-bearing blast furnace …

Currently, ore containing about 30% Fe, 10% TiO2, and 0.3% V2O5 is smelted in blast furnaces at the Panzhihua Iron and Steel Corporation. Most Ti components in the ore …

Effect of Ti addition on corrosion behaviors of Fe-Ni-Cr-Al …

The corrosion behavior of Fe 45 Ni 30-x Cr 15 Al 10 Ti x (x = 0–5 at%) high-entropy alloys (HEAs) in static liquid lead-bismuth eutectic (LBE) at 550 °C with saturated and low …

Abstract and Figures

Fertilization assures mineral nutrition but does not overcome the effects of Fe accumulation in plants grown in iron ore tailings March 2022 Environmental Science and Pollution Research 29(12):1-16

Effects of Temperature on Fe and Ti in Carbothermic …

Effects of temperature on Fe and Ti in carbothermic reduction of vanadium titanomagnetite (VTM) concentrate with adding MgO at 1100~1500°C were investigated. It was found that most of Fe in the VTM concentrate existed in the form of magnetite and a small amount existed as ilmenite; Ti in the VTM concentrate was mainly present in the form of ilmenite. The …

In situ crystallization of Fe-Ti oxides in the Bijigou layered

The genesis of magmatic Fe-Ti-(V) oxide deposits in layered intrusions is closely related to chemical evolution of basaltic magmas and dynamic processes in crustal magma chamber (Wager and Brown, 1968, Irvine, 1975, Cawthorn, 1996 and references therein).However, it has been debated how crystallizing Fe-Ti oxides can be accumulated to …

Immiscible hydrous Fe–Ca–P melt and the origin of iron

The origin of orebodies composed of low-Ti iron oxide minerals (magnetite and/or hematite) and apatite in (sub)volcanic rocks is controversial 1,2,3,4,5,6,7,8,9,10,11,12.These rocks, essentially ...