Nonisothermal Behavior of the Oxidation of Natural Ilmenite Pellet
Cited-By (1) The kinetics of the oxidation of a cement-bonded pellet made of natural ilmenite was studied with an unsteady nonisothermal kinetic model derived by assuming pseudo-steady state mass transfer through the product layer and unsteady state heat transfer within the pellet. The derived model agreed well with the experiments.Web
اقرأ أكثرInvestigation of the Hydrogen-Rich Reduction of Panzhihua …
The main reactions in the reduction process are listed in Table 2, and the standard Gibbs-free energy vs. temperature plot for the possible reactions in the reduction process is shown in Fig. 3. In the temperature range from 1000 to 1100 °C (Close to shaft furnace reduction temperature), the difficulty in reducing …
اقرأ أكثر(PDF) Preparation of Ferrotitanium from Ilmenite by Electrolysis
ilmenite pellet (20 mm in diameter, 5 mm in thick-ness, 1.5 g in weight) was then put into a Al. 2. O. 3. crucible (25 mm in inner diameter, 30 mm in outer. diameter, and 8 mm in depth), and it ...Web
اقرأ أكثرMetals | Free Full-Text | Reduction Kinetics of Pre-Oxidized Ilmenite
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 by the slower …Web
اقرأ أكثرValue Addition to Ilmenite Using Carbonized Waste Coconut
The value addition potential of ilmenite was examined using several characterization techniques. Raw ilmenite is composed of 93.65 wt.% of FeOTiO2, 3.55 wt.% of SiO2, 1.22 wt.% of Al2O3, and the remainder being other minor oxides. Ilmenite and powdered carbonized coconut shells were mixed in the weight ratio of 4:1. A separate …Web
اقرأ أكثرTitanium: An Overview of Resources and Production Methods
For several decades, the metallurgical industry and the research community worldwide have been challenged to develop energy-efficient and low-cost titanium production processes. The expensive and energy-consuming Kroll process produces titanium metal commercially, which is highly matured and optimized. Titanium's strong …Web
اقرأ أكثرIlmenite coated pellet and process for reducing same
We claim: 0.4. 1. A coated pellet comprising a core consisting of a suitable mixture for a metallurgical reductive process and a coke matrix skin substantially surrounding the core, the core comprising an ilmenite ore, solid carbonaceous material capable of reducing the iron oxide in ilmenite to metallic iron and a flux chosen from the group consisting of alkali …Web
اقرأ أكثر(PDF) Reduction Kinetics of Pre-Oxidized Ilmenite
PDF | The reduction behavior of pelletized and pre-oxidized ilmenite is investigated in H2-H2O atmospheres containing between 0 and 7% H2O and at... | Find, …Web
اقرأ أكثرA Novel Process for Preparing High-Strength Pellets of Ilmenite
The compressive strength of the ilmenite concentrate pellet which greater than 1700 N is available. In this study, a novel process for preparing Pan-xi ilmenite …Web
اقرأ أكثرUS3941583A
US3941583A US05/419,103 US41910373A US3941583A US 3941583 A US3941583 A US 3941583A US 41910373 A US41910373 A US 41910373A US 3941583 A US3941583 A US 3941583A Authority US United States Prior art keywords pellets coke pellet ilmenite flux Prior art date Legal status (The legal status is an assumption and is not a …Web
اقرأ أكثرInvestigation on the pre-reduction of ilmenite pellet using H 2 /CO
Abstract and Figures In this study, ilmenite and bentonite were uniformly mixed, pelletised, and baked at temperatures up to 1200°C. The reduction of ilmenite …Web
اقرأ أكثرIron ore pellet drying assisted by microwave: A kinetic evaluation
ABSTRACT Drying is a critical process step to achieve excellent pellet quality in pelletizing process. The complexity and energy consumption toward moisture removing, especially for highly hydrated iron ore, increased the need for breakthrough enhancements to this process. The present study has evaluated kinetics parameters of …Web
اقرأ أكثرOptimization of preparation process of high-strength pellets from
Abstract. The preparation of high-strength pellets from Panzhihua ilmenite concentrate is important for the hydrogen-rich smelting of titania slag and was …Web
اقرأ أكثرSolar Carbothermic Reduction of Ilmenite Using Palm Kernel …
A carbothermic reduction of complex Kalimantan ilmenite (FeTiO3) with palm kernel shell biomass as a reducing agent using regular electric and simulated solar heating has been investigated. The results demonstrate that palm kernel shell biomass can be used as an alternative reductant for the carbothermic reduction. Incomplete ilmenite …Web
اقرأ أكثرInvestigation on the pre-reduction of ilmenite pellet using H
The reduction of ilmenite pellet by H 2 /CO mixtures and H 2 pure gas was studied in the temperature range of 760–890°C. Reduced pellet microstructures and …Web
اقرأ أكثرDirect Electrosynthesis of Fe-TiC Composite from Natural Ilmenite …
Fe-TiC composite has been directly synthesized from natural ilmenite/carbon mixture precursors at 900–1000°C and 3.1–3.8 V in molten CaCl 2.The pressed natural ilmenite/carbon mixture pellet was used as the cathode, and an inert solid oxide oxygen-ion-conducting membrane (SOM) tube filled with carbon-saturated liquid tin as well as a …Web
اقرأ أكثرPhase Evolution During the Carbothermic Reduction Process of Ilmenite
The phase evolution during the carbothermic reduction process of Panzhihua ilmenite concentrate was investigated under argon atmosphere. The Panzhihua ilmenite concentrate briquette with graphite powder was reduced at 1473 K, 1573 K, 1673 K, and 1773 K (1200 °C, 1300 °C, 1400 °C, and 1500 °C) respectively, with the molar ratios of C …Web
اقرأ أكثرMetals | Free Full-Text | Carbothermic Reduction of Ilmenite
The influences of heating pattern and sodium carbonate addition on the carbothermic reduction of ilmenite concentrate have been experimentally studied. The experiments were carried out using isothermal–gradient temperature technique between 1000 °C and 1500 °C with different temperature profiles for a total reduction time …Web
اقرأ أكثرKinetics and Mechanisms of Carbothermic Reduction of …
tion of a Sri Lankan ilmenite with sawdust as the reduct-ant. The ilmenite ore was initially pre-oxidized at 1273 K for 3 h to convert the ilmenite into ferric pseudobrookite Fe(2 TiO 5) and rutile. The pre-oxidation process generated micro-cracks and pores on the surface of the particles, which accelerates the subsequent reduction process.Web
اقرأ أكثرReduction behaviors of vanadium‑titanium magnetite with H2 via …
The reduction behaviors of vanadium‑titanium magnetite with H 2 via a fluidized bed were experimentally studied. The effects of reduction temperature, H 2 concentration, reduction time and gas flow rate on metallization degree of the reduced samples were also investigated. The major conclusions were summarized as follows: (1) …Web
اقرأ أكثرSegregation of Iron and Titanium in an Iron Sand Concentrate Pellet
An iron sand concentrate was pelletized and reduced using coal under the isothermal–temperature gradient profile with a controlled heating rate starting from 1000 °C to a final temperature of 1180–1380 °C. Each pellet was a non-composite mixture, where coal as a reductant was added to cover the whole surface of the pellet. The visual …Web
اقرأ أكثرFlow diagram for composite pellet making.
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 ...Web
اقرأ أكثرAn Optimal Route for the Preparation of Metallized
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 ...Web
اقرأ أكثرInvestigation on the pre-reduction of ilmenite pellet using H 2 /CO
DOI: 10.1080/00084433.2023.2258613 Corpus ID: 262166697; Investigation on the pre-reduction of ilmenite pellet using H 2 /CO atmospheres @article{Saghafi2023InvestigationOT, title={Investigation on the pre-reduction of ilmenite pellet using H 2 /CO atmospheres}, author={Mohammad hossein Saghafi and Abootaleb …Web
اقرأ أكثرAn Analysis of the Influence of Drying Methods on the Drying
The effects of microwave and conventional oven drying on the drying kinetics and the quality of the ilmenite-coke composite pellets are presented. The drying time was substantially reduced in microwave drying (90 s) compared to conventional oven drying (10 min) for the exact size of composite pellets. The activation energy values in microwave …Web
اقرأ أكثرInduration aspects of low-grade ilmenite pellets
The compressive strength can reach up to 2900 N when the ilmenite concentrate pellet with 15% magnetite concentrate is pre-heated above 800 °C for 20 min and then roasted at 1250 °C for 20 min ...Web
اقرأ أكثرInduration aspects of low-grade ilmenite pellets: Optimization of
The oxidation mechanism of ilmenite pellets was correlated to the pellet consolidation. Abstract Induration of ilmenite pellets by oxidation is an essential step in …Web
اقرأ أكثرKinetics and reaction mechanism of isothermal oxidation of …
Rao and Rigaud [] investigated the kinetics of the isothermal oxidation of both synthetic ilmenite powders and pellets for 6 h with pure oxygen and air.They found that the logarithmic rate was primarily obeyed. Activation energy for oxidation of ilmenite powder in the range of 507–704 °C was 8.5 kcal mol −1 (35.59 kJ mol −1) with oxygen and in the …Web
اقرأ أكثرCarbothermic Reduction of Iron Oxide Waste Generated During …
3.1 Characterization of Sample Received from Ilmenite Processing. The composition of waste iron oxide powder obtained from ilmenite processing was chemically analyzed. It contained 63% of iron (constitute ~ 90% Fe 2 O 3) along with some impurities such as Mn (0.8%), Mg (1.4%), Al (0.8%) and traces of Si, Ti, etc.The sample was also …Web
اقرأ أكثر(PDF) Reduction Kinetics of Pre-Oxidized Ilmenite
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).Web
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