Solid ilmenite feed can be reduced more quickly than molten one. Mild preheating effectively promotes the reduction of ilmenite pellets while intensive preheating obviously retards the reaction.
The preparation of high-strength pellets from Panzhihua ilmenite concentrate is important for the hydrogen-rich smelting of titania slag and was investigated. The effects of the magnetite concentrate and heating procedure including the pre-heating temperature and period as well as roasting temperature and period on the compressive strength of …
In this study, ilmenite and bentonite were uniformly mixed, pelletised, and baked at temperatures up to 1200°C. The reduction of ilmenite pellet by H2/CO mixtures and H2 pure gas was studied in the...
Wechsler B A, Prewitt C T, American Mineralogist, 69 (1984) p.176-185, Crystal structure of ilmenite (FeTiO3) at high temperature and high pressure, 24 deg C
The present communication describes an investigation on the preparation of metallized composite pellets from ilmenite concentrate. It was observed that the pellet size in the range of 8–12 mm, a binder dosage of 4 wt%, and internal carbon of 5 wt% are the optimum levels that help the pellets attain the desired drop number (~ 10) and dry …
Semantic Scholar extracted view of "Induration aspects of low-grade ilmenite pellets: Optimization of oxidation parameters and characterization for direct reduction application" by D. Nayak et al.
The programmed heating is aimed at promoting dehydration and pore-forming. The porosity of the sintered pellets ranged from 30% to 40% by volume. The sintered ilmenite pellets were used as cathodes, which were wrapped tightly with molybdenum wire and connected to a DC power source.
The hydrogen reduction kinetics of ilmenite was studied thermogravimetrically from I 073 to 1 273 K with three kinds of cement-bonded natural ilmenite pellets. The kinetic behavior of the reduction of preoxidized ilmenite was researched with the same technique from 973 to 1 273 K. The reduction of the pellets …
Ilmenite, iron-black, heavy, metallic oxide mineral, composed of iron and titanium oxide (FeTiO3), that is used as the major source of titanium. It forms solid-solution series with geikielite and pyrophanite in which magnesium and manganese, respectively, replace iron in the crystal structure.
A novel mechanism for the carbothermal reduction of Ilmenite is proposed and validated with the help of a comprehensive mathematical model. A time-dependent isothermal pellet-grain model is used to simulate the kinetic behaviour of a spherical pellet of ilmenite (FeTiO 3) in CO/CO 2 atmosphere. The proposed mechanism involves diffusion of CO …
High-quality titanium pellets were prepared through applying the optimum path for ilmenite oxidization and consolidation in present investigation. The…
Ilmenite Meditation and Grounding. Ilmenite is a fantastic stone for meditation. Not only does it help center your energies to make you more focused and calm, but it also has other useful metaphysical properties. It can be used for astral travel, intuition awakening, and chakra balancing. Ilmenite Affirmation.
Through a comprehensive analysis of the performance and microstructure of ilmenite concentrate particles, oxidized pellets, and pre-reduced pellets, it has been confirmed …
Ilmenite is commonly recognized in altered igneous rocks by the presence of a white alteration product, the pseudo-mineral leucoxene. Often ilmenites are rimmed with leucoxene, which allows …
Abstract: The reduction behavior of pelletized and pre-oxidized ilmenite is investigated in H2-H2O atmospheres containing between 0 and 7% H2O and at temperatures between 983 and 1183 K (710 and 910 C). The reduction mechanism occurs in two stages wherein the rapid reduction of trivalent to divalent iron cations is followed …
The invention discloses a pelletizing method of ilmenite concentrates and a pellet binder, wherein the method comprises the following steps: uniformly mixing the ilmenite concentrates, the binder and a carbonaceous reducing agent to obtain a mixed material; pressing the mixed material into green pellets; and drying the green pellets to obtain the …
In this study, ilmenite and bentonite were uniformly mixed, pelletised, and baked at temperatures up to 1200°C. The reduction of ilmenite pellet by H 2 /CO mixtures and H …
Geikielite-Ilmenite Series, Ilmenite-Pyrophanite Series. The iron analogue of Geikielite, Pyrophanite, and Ecandrewsite. May be confused with minerals of ...
Therefore, in the present work, the pelletization of ilmenite concentrate was investigated to prepare composite pellets as appropriate feedstock for titania slag production. In …
Induration of ilmenite pellets by oxidation is an essential step in the pelletization process since it decides the physical and metallurgical properties of the pellets. In this regard, the induration parameters such as temperature and roasting time have been optimized to obtain good quality ilmenite pellets made of concentrates …
A flowsheet combining high gradient magnetic separation (HGMS) and flotation was applied to recover the ilmenite, which had defects of high production cost due to high flotation regent consumption, low ilmenite utilization rate of 20% as ultrafine minerals were directly discharged into tailings, as well as bring a series of environmental …
Semantic Scholar extracted view of "Investigation on the pre-reduction of ilmenite pellet using H 2 /CO atmospheres" by M. Saghafi et al.
In this study, ilmenite and bentonite were uniformly mixed, pelletised, and baked at temperatures up to 1200°C. The reduction of ilmenite pellet by H2/CO mixtures and H2 pure gas was studied in ...
Ilmenite is a black iron titanium oxide mineral found in igneous rocks and sediments. It is the primary ore of titanium.
Reduction of an ilmenite concentrate as a natural concentration containing 49.78 mass% TiO2 and 27.96 mass% total Fe by H2–Ar gas mixtures was investigated from 1073 to 1273 K.
Through a comprehensive analysis of the performance and microstructure of ilmenite concentrate particles, oxidized pellets, and pre-reduced pellets, it has been confirmed that ilmenite pellets pretreatment with HPGR exhibit improved performance and lower apparent reaction activation energy.
In particular, studies have been undertaken on the reduction process of ilmenite-coke composite pellets. The difference in the reduction behaviour of raw ilmenite and ilmenite-coke composite pellets has been established and compared with that of the pre-oxidized raw pellets.
The present investigation is aimed at suggesting a theoretically sensible mechanism for the reduction of Ilmenite in CO/CO2 atmosphere and evaluating the mechanism with the help of a comprehensive mathematical model. A pellet-grain model is used with the assumption that each pellet of Ilmenite consists of a number grains..
The reduction of ilmenite pellet by H. 2/CO mixtures and H. 2pure gas was studied in the temperature range of 760–890°C. Reduced pellet microstructures and phases analysed by, Optical ...
The reduction of ilmenite pellet by H. 2/CO mixtures and H. 2pure gas was studied in the temperature range of 760–890°C. Reduced pellet microstructures and phases analysed …
In this regard, the induration parameters like temperature and roasting time have been optimized to obtain good quality ilmenite pellets made of concentrates obtained from low-grade ilmenite ores ...
ilmenite ĭlˈmĕnīt [ key], black mineral, iron titanium oxide, FeTiO 3, crystallizing in the hexagonal system. It is sometimes found as tabular hexagonal crystals but occurs more commonly as small grains in igneous and metamorphic rocks and in …
Ilmenite Prices, Occurrence, Extraction, and Uses. Ilmenite, also known as titanium iron, titanium iron ore or by its synonym menaccanite, is a frequently occurring mineral from the mineral class of "oxides and hydroxides". It crystallizes in the trigonal crystal system with the chemical composition FeTiO3 and develops mostly thick tabular ...
The reduction behavior of pelletized and pre-oxidized ilmenite is investigated in H2-H2O atmospheres containing between 0 and 7% H2O and at temperatures between 983 and 1183 K (710 and 910 °C ...
The hydrogen-rich reduction of ilmenite concentrates has a significant effect on the reduction of the carbon footprint of the titanium slag production process. This study investigates the hydrogen-rich reduction of Panzhihua ilmenite concentrate pellets. The pellets were roasted at 500, 700, 900, and 1100 °C and used as the raw material for the …
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The reduction of ilmenite pellet by H2/CO mixtures and H2 pure gas was studied in the temperature range of 760–890°C.
