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
قرأ أكثر
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
قرأ أكثر
Pan-xi ilmenite concentrate undergoes pelleting to produce an oxidation-roasted pellet. Second, the oxidation roasted ilmenite concentrate pellet is reduced by hydrogen-rich gas in a shaft furnace to produce a metallized pellet. Finally, the iron and slag in the metallized pellet are melted and separated in an electrothermal furnace to produce hotWeb
قرأ أكثر
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
قرأ أكثر
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
قرأ أكثر
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
قرأ أكثر
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 …
قرأ أكثر
letization process for pellet hardening [11, 20, 24]. Therefore, in the present work, the pelletization of ilmenite concentrate was investigated to prepare composite pellets as appropriate feedstock for titania slag production. In addition, an optimum route has been suggested to improve the pellet properties con-Web
قرأ أكثر
The batch wood pellet experiments show that the ilmenite oxygen buffering effect is mitigated due to high local oxygen demand around the pellets and limited pellet distribution in the bed. Finally, the …Web
قرأ أكثر
In this study, a rapid digestion protocol using ammonium bifluoride (NH 4 HF 2) was developed to completely digest large amounts of rutile, ilmenite, titanite and perovskite. These Ti-rich samples (50 mg) can be completely digested in 4 hours with the use of 300 mg of NH 4 HF 2 at 230 °C, and each 200 mg of rutile and ilmenite ore can …Web
قرأ أكثر
The direct electrochemical extraction of Ti-Fe alloys from natural ilmenite (FeTiO3) in molten CaCl2 is reported in this article. The sintered porous pellet of natural ilmenite acted as the cathode of the electrochemical system, and the carbon-saturated liquid tin contained in a solid-oxide oxygen-ion-conducting membrane (SOM) tube served …Web
قرأ أكثر
Conventionally TiO 2 is produced from Ilmenite ore by carbothermic reduction followed by leaching of iron to produce high purity TiO 2 which leads to loss of metallic iron and disposal of effluents. Therefore, an attempt has been made to develop a process for production of TiO 2 utilizing low grade raw materials. Ilmenite ore pellets of …Web
قرأ أكثر
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
قرأ أكثر
Abstract The kinetics and mechanisms of carbothermic reduction of a complex Kalimantan weathered ilmenite (FeTiO 3) using palm kernel biomass were …Web
قرأ أكثر
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
قرأ أكثر
Furthering the electrolytic time can promote the dense structure of ilmenite pellet turn to be more porous, indicating pores inside the pellet are sufficient for the diffusion of oxygen ions.Web
قرأ أكثر
Abstract. The preparation of high-strength pellets from Panzhihua ilmenite concentrate is important for the hydrogen-rich smelting of titania slag and was …Web
قرأ أكثر
XRD diffractograms of a) raw ilmenite concentrate, b) oxidized ilmenite pellet, and c) reduced ilmenite pellet During the oxidation of ilmenite at temperatures higher t han 800 °C, the phase ...Web
قرأ أكثر
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
قرأ أكثر
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
قرأ أكثر
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
قرأ أكثر
High-quality oxidized pellets are the basis to achieve high-efficiency utilization of vanadium–titanium magnetite (VTM) ores. Bentonite was used as a binder of VTM. The main phase composition of VTM is titanomagnetite and ilmenite. When the amount of bentonite is 1%, the compressive strength and dropping strength of VTM pellets can …Web
قرأ أكثر
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
قرأ أكثر
Ilmenite is an important mineral resource containing Fe and Ti, and titanium concentrate can be obtained after beneficiation. Through the preparation of titanium concentrate oxidized pellets, gas-based shaft furnace reduction experiments, and melting and separation experiments, the phase changes during the roasting process of titanium …Web
قرأ أكثر
Synthesis gas, produced from natural gas, can be used to minimise coal consumption and carbon dioxide emissions during the processing of ilmenite. Two different ilmenite ores have been reduced with carbon monoxide and hydrogen mixtures to investigate the effects of temperature and gas composition on the final product. …Web
قرأ أكثر
The ilmenite pellet (20 mm in diameter, 5 mm in thickness, 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 was located at the bottom of the Al 2 O 3 vessel, as shown in Fig. 1. The distance between raw material pellet and the molybdenum plate cathode was 10 …Web
قرأ أكثر
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
قرأ أكثر
using high gr ade raw mater ials and an acid ic media is us ed as a leaching agent for. separatio n of TiO. 2. ... Then, 1.34 kg of reduced ilmenite pellet was added gradually in the. batch of 500 ...Web
قرأ أكثر
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
قرأ أكثر
Abstract The reduction behavior of pelletized and pre-oxidized ilmenite is investigated in H 2 -H 2 O atmospheres containing between 0 and 7% H 2 O and at …Web
قرأ أكثر
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
قرأ أكثر
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
قرأ أكثر
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
قرأ أكثر
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
قرأ أكثر