Effect of time on metallisation degree in different reduction

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 ...

Preparing high-strength titanium pellets for ironmaking as …

DOI: 10.1016/J.POWTEC.2018.04.042 Corpus ID: 104016245; Preparing high-strength titanium pellets for ironmaking as furnace protector: Optimum route for ilmenite oxidation and consolidation

Investigation of the Hydrogen-Rich Reduction of Panzhihua Ilmenite …

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 …

Reduction Kinetics of Pre-Oxidized Ilmenite Pellets by H

The present work proposes to deal with this challenge by investigating the reduction of pre-oxidized ilmenite pellets at various temperatures and levels of water …

A Novel Process for Preparing High-Strength Pellets of …

Investigation of the Hydrogen-Rich Reduction of Panzhihua Ilmenite …

The hydrogen-rich reduction of ilmenite concentrates has a significant effect on the reduction of the carbon footprint of the titanium slag production process.

(PDF) Effect of titanium suboxides on the reaction …

Hydrogen metallurgy, as a green metallurgical technology, is one of the effective ways to reduce carbon emissions. The generation of titanium suboxides (TinO2n-1, 3 ≤ n ≤ 9) during the ...

Kinetics and mechanism of hydrogen reduction of ilmenite powders

Both isothermal and non-isothermal reduction experiments of Panzhihua ilmenite powders by H 2 were carried out. It was shown that in the temperature range of 1146–1201 K, the main reduction products were Fe, TiO 2 and MgTiO 3 with the iron being embedded in TiO 2 matrix. The reduction reaction was controlled by the chemical …

A Novel Process for Preparing High-Strength Pellets of Ilmenite …

In the present study, a novel process to prepare high-strength pellets of high-calcium, high-magnesium ilmenite concentrate was investigated. Magnetite concentrate and bentonite were selected as the additive and binder of the pellet, respectively. The effects of the magnetite concentrate content, bentonite content, and …

Phase Transitions and Microstructural Changes During …

activity in the oxide phase, which leads to lowering the reac-tion potential and slowing down the reduction rate [11, 12]. In the current work, a weathered ilmenite concentrate was

Mechanism of strengthening consolidation and reduction of ilmenite …

Drying rate of ilmenite green pellet was measured by a heating furnace with blast blower. When the furnace was heated to the predetermined temperature, a certain mass of green ilmenite pellets with diameters ranging from 10 to 15 mm was introduced into the furnace, ensuring that the height of the green pellets layer reached 200 mm.

Pelletization performance of Panzhihua ilmenite …

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 ...

Kinetics and mechanism of hydrogen reduction of ilmenite …

Semantic Scholar extracted view of "Kinetics and mechanism of hydrogen reduction of ilmenite powders" by J. Dang et al. ... Reduction Kinetics of Pre-Oxidized Ilmenite Pellets by H2-H2O Gas Mixtures. Vincent Canaguier E. Ringdalen. Materials Science, Chemistry. ... About Us Meet the Team Publishers Blog (opens in a new tab) …

Reduction Kinetics of Pre-Oxidized Ilmenite Pellets by H

The reduction behavior of pelletized and pre-oxidized ilmenite is investigated in H 2-H2O atmospheres containing between 0 and 7% H 2 O 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 metallization of iron.

Preparation of Ferrotitanium Alloy from Ilmenite by

Ferrotitanium alloy is prepared by electrochemical reduction from ilmenite in LiCl-KCl and LiCl-KCl-CaCl2 molten salts, respectively. The products prepared are observed by x-ray diffraction (XRD). It is shown that Fe2Ti can be prepared from ilmenite in LiCl–KCl molten salt at 1073 K with a cell voltage of 3.2 V. Ilmenite can be …

Optimization of preparation process of high-strength pellets …

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 …

Beneficiation of Titanium Oxides From Ilmenite by Self …

DOI: 10.1016/S1006-706X(06)60033-2 Corpus ID: 135692889; Beneficiation of Titanium Oxides From Ilmenite by Self-Reduction of Coal Bearing Pellets @article{Xu2006BeneficiationOT, title={Beneficiation of Titanium Oxides From Ilmenite by Self-Reduction of Coal Bearing Pellets}, author={Menghan Xu and Mingrong Guo and …

Reduction Kinetics of Cement-bonded Natural Ilmenite Pellets …

The reduction kinetics of preoxidized pellets was analyzed according to a two-interface kinetic model and the kinetic parameters of the two main reactions Fe 3+ →Fe 2+ and Fe 2+ →Fe°, which mainly constitute the overall reduction of preoxidized ilmenite pellets, were determined separately. The experimental data of the reduction of ...

SEM images of raw and oxidized ilmenite concentrates

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.

[DO NOT PUBLISH] In the United States Court of Appeals

production process generates a byproduct called ilmenite. US Iron is in the business of procuring minerals, like ilmenite, for resale. In 2019, US Iron's principal, Mark Miller, …

Isothermal oxidation kinetics of ilmenite concentrate …

1. Introduction. A mineral of ilmenite type is a common raw material to produce titanium dioxide and titanium metal. The ilmenite concentrate from Panzhihua, which is mainly composed of FeTiO 3, MgTiO 3 and Fe 3 O 4, is an important mineral resource for TiO 2 pigment production in China [1], [2].The reduction and smelting of …

Investigation of the Hydrogen-Rich Reduction of Panzhihua Ilmenite …

adshelp[at]cfa.harvard.edu The ADS is operated by the Smithsonian Astrophysical Observatory under NASA Cooperative Agreement NNX16AC86A

Investigation on the pre-reduction of ilmenite pellet using H …

The carbothermal reduction of a primary ilmenite concentrate was studied in hydrogen, argon, and helium. Ilmenite and graphite were uniformly mixed and pressed …

Reduction Kinetics of Pre-Oxidized Ilmenite Pellets by H

The reduction behavior of pelletized and pre-oxidized ilmenite is investigated in H 2-H2O atmospheres containing between 0 and 7% H 2 O and at temperatures between 983 …

Mechanism of strengthening consolidation and reduction of ilmenite …

DOI: 10.1016/j.powtec.2024.119515 Corpus ID: 267589911; Mechanism of strengthening consolidation and reduction of ilmenite pellets through high-pressure grinding rolls pretreatment

An Analysis of the Influence of Drying Methods on the …

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 …

Green Electrochemical Process Solid-Oxide Oxygen-Ion …

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 …

Direct Carbothermic Reduction of Weathered Ilmenite for …

The commercial processes to extract iron from ilmenite (FeTiO3) essentially include energy-intensive methods, such as high-temperature reduction smelting or preoxidation, coupled with reduction by carbon. However, due to altered mineralogy of ilmenite caused by weathering at sea coast, the reduction of iron remains incomplete in …

Effects of pre-oxidation on the hydrogen-rich reduction of …

Semantic Scholar extracted view of "Effects of pre-oxidation on the hydrogen-rich reduction of Panzhihua ilmenite concentrate powder: Reduction kinetics and mechanism" by Furong Chen et al. ... Mechanism of strengthening consolidation and reduction of ilmenite pellets through high-pressure grinding rolls pretreatment. ... About …

Effects of H2, CO, and a gas mixture on the reduction …

Section snippets Experimental. The raw ilmenite concentrate used in this study was the same as that used in a previous publication [38]. Ilmenite concentrate powder with a TiO 2 content of 46.19 wt% was provided by Panzhihua Iron and Steel (Group) Co., Ltd. Pre-oxidized ilmenite concentrate was prepared by oxidizing raw …