magnetite concentrate kinetics

Reduction kinetics of magnetite concentrate particles by ...

ABSTRACTIn this study, the reaction kinetics of carbon monoxide reduction of magnetite ore concentrate in the temperature range of 973–1173 K (700–900°C) has been investigated using the thermal-gravimetric analysis. Various methods were used to obtain the governing mechanism and reaction rate constant of this reaction. It was observed that the sintering phenomenon affects the concentrate ...

(PDF) Kinetics of Hydrogen Reduction of Magnetite Ore Fines

PDF | The current work deals with the production of iron by the hydrogen reduction of magnetite ore fines in a thermogravimetric analyzer (TGA). The variables studied were time (0–30 min ...

Synthesis and properties of Fe3O4-activated carbon ...

Feb 17, 2013· In this study, powder activated carbon (PAC) and magnetic nanoparticles of iron (III) oxide were used for synthesis of Fe 3 O 4-activated carbon magnetic nanoparticles (AC-Fe 3 O 4 MNPs) as an adsorbent for the removal of aniline. The characteristics of adsorbent were evaluated by SEM, TEM, XRD and BET.

Kinetics of magnetite (Fe3O4) oxidation to hematite (Fe2O3 ...

The surfaces were prepared in ultra high vacuum from natural magnetite crystals. We found that the vapor pressure, p(H2O), at which first reacts with magnetite is similar for the two surfaces (<10-5 Torr for 3 min. exposures, corresponding to doses of < 1.8 x 103 langmuirs) and is consistent with a smallmore »

Reduction Kinetics and Mechanism of Pellets Prepared from ...

Reduction kinetics and mechanism of pellets prepared from high-chromium vanadium-titanium magnetite concentrate, in Proceedings Iron Ore 2015, pp 349–358 (The Australasian Institute of Mining and Metallurgy: Melbourne). Related products.

Kinetics of Direct Reduction Titanomagnetite Concentrate ...

separation method has been proposed for refining both metallic iron and Ti slag from the titaniferous magnetite concentrate. In this method, the role of DRI process is to produce prereduction pellets (with the metallization - ... The reduction kinetics of titano-magnetite was analyzed according to a dual reactions kinetic ... Kinetics of Direct ...

(PDF) Kinetics of the Reduction of Hematite Concentrate ...

kinetics of magnetite concentrate by Choi and Sohn[2] There had been little work on the gaseous reduction and Wang and Sohn[15] as well as the H2 reduction of iron oxide concentrates before the conception of the kinetics of hematite by Chen et al.[17] The drop-tube new flash ironmaking technology.[2,15,16] In conjunction reactor system ...

Grinding Kinetics of Vanadium-Titanium Magnetite ...

Abstract The grinding behavior of the as-received (5 pct moisture) vanadium-titanium magnetite concentrates in a damp mill was investigated in this paper. A grinding kinetics equation was established based on a population balance model using size distribution data …

Effect of mechanical activation on the hydrogen reduction ...

May 11, 2017· The effect of mechanical activation on the reduction kinetics of magnetite concentrate by hydrogen was studied. The magnetite concentrate was milled for 8 h in a planetary ball mill. After 8 h of milling, the average particle size was reduced from 14 to 4.4 µm, resulting in a lattice microstrain of 0.3.

Reduction kinetics of oxidized vanadium titano-magnetite ...

Jun 05, 2017· The gas-based isothermal reduction kinetics of oxidized vanadium titano-magnetite (VTM) under the range of 1173–1323 K was investigated in this study. The influence of reduction temperature, gas composition and reduction time on reduction process were studied.

Reduction Kinetics of Magnetite Concentrate ... - SpringerLink

Due to the significant melting that occurs above 1350 °C, the reduction kinetics was measured and analyzed in two distinct temperature ranges of 1150 to 1350 °C and 1350 to 1600 °C (~50 °C increments). Experiments were performed using magnetite concentrate particles of different sizes under various hydrogen partial pressures and residence ...

Investigation of Magnetite Oxidation Kinetics at the ...

The oxidation kinetics of magnetite pellets from sintering studies have been studied at two levels, namely, the pellet scale and at the particle scale, and the findings of the latter are presented here. The rate of oxidation of the magnetite concentrate depends primarily on temperature, oxygen content in the oxidizing gas, and particle size.

(PDF) Hydrogen Reduction Kinetics of Hematite Concentrate ...

Although the novel ironmaking technology is being developed for magnetite concentrate, it is expected to be equally applicable to hematite concentrate. Thus, in this work, the hydrogen reduction kinetics of hematite concentrate particles in the temperature range from 1423 K …

Solid-state reduction kinetics and mechanism of pre ...

The solid-state reduction kinetics of pre-oxidized vanadium-titanium magnetite concentrate was studied. The phase and microstructure of the reduction product were characterized by XRD, SEM and EDS methods, based on which the mechanism of the solid-state reduction was investigated.

Antibody-Conjugated Paramagnetic Nanobeads: Kinetics of ...

An ideal magnetic nanobead-based cell labelling system would offer completely specific binding of beads to target cells while completely avoiding binding of beads to non-target cells . To optimize a nanobead-based magnetic separation system, it is therefore crucial to understand the kinetics of specific and unspecific binding of beads to cells.

Kinetics of Hydrogen Reduction of Magnetite Concentrate ...

The kinetics of hydrogen reduction of solid magnetite concentrate particles is determined in the temperature range 1150–1350 °C as part of the development of a novel ironmaking process on-going at University of Utah.

Kinetics of hematite to magnetite transformation by ...

Consequently, the studied kinetics allows a relatively quick estimation of the energy costs associated with the transformation of low-magnetic iron ores to magnetite. In addition, a good conversion kinetics at low CO concentrations makes this method safer and less energy-consuming for …

Improving the Oxidizing Kinetics of Pelletization of ...

In this paper the effect of the high press roll grinding (HPRG) on the oxidizing kinetics of the pelletization of magnetite concentrate was investigated, which aims to improve the pelletability of the concentrate. The comparison of the roasted pellet strength at various process parameters of ...

Improving the Oxidizing Kinetics of Pelletization of ...

Request PDF on ResearchGate | Improving the Oxidizing Kinetics of Pelletization of Magnetite Concentrate by High Press Roll Grinding | In this paper the effect of the high press roll grinding ...

Reduction kinetics of magnetite concentrate particles by ...

In this study, the reaction kinetics of carbon monoxide reduction of magnetite ore concentrate in the temperature range of 973–1173 K (700–900°C) has been investigated using the thermal ...

Solid-state reduction kinetics and mechanism of pre ...

vanadium−titanium magnetite concentrate is more complicated than other common ores, requiring higher temperature and longer reduction time to achieve a relatively high metallization ratio [9]. Hence, it is important to investigate the reduction kinetics and mechanism of the vanadium−titanium magnetite concentrate.

Reduction kinetics and mechanism of pellets prepared from ...

High chromium vanadium–titanium magnetite has not been exploited and made full use of on a large scale so far due to the immature utilisation technology and the reality that the utilisation efficiency of valuable metals still urgently needs to be improved. In the present paper, the isothermal reduction kinetics and mechanism of high chromium vanadium–titanium pellets were studied at 800 ...

Reduction Kinetics of Magnetite Concentrate Particles with ...

Due to the significant melting that occurs above 1350 °C, the reduction kinetics was measured and analyzed in two distinct temperature ranges of 1150 to 1350 °C and 1350 to 1600 °C ( 50 °C increments). Experiments were performed using magnetite concentrate particles of different sizes under various hydrogen partial pressures and residence ...

The influence of temperature on the kinetics of apatite ...

Read "The influence of temperature on the kinetics of apatite flotation from magnetite fines, International Journal of Mineral Processing" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

The influence of temperature on the kinetics of apatite ...

The influence of pulp temperature on the kinetics of apatite flotation from magnetite fines was studied using Atrac (fatty acid type) as collector and sodium silicate as dispersant at pH 8.5–9.0. The batch flotation tests were conducted in a specially designed temperature controlled flotation cell.

(PDF) Hydrogen Reduction Kinetics of Hematite Concentrate ...

PDF | As an integral part of developing a novel ironmaking process, the hydrogen reduction kinetics of hematite concentrate particles (average particle size 21 µm) was measured in the temperature ...

Reduction Kinetics of Magnetite Concentrate Particles with ...

The particle kinetics were studied using magnetite concentrate particles of different sizes. Reduction degree of 60% was achieved in a few seconds in at 1350 °C using CO reductant alone and over 90% when H 2 + CO gas mixture was used. The effects of reductant partial pressures, temperature, and particle size on the reduction kinetics were studied.

Improving the Oxidizing Kinetics of Pelletization of ...

are referred to that with the concentrate pretreated by damp milling. 3. Results and Discussion 3.1. Oxidation Kinetics of Magnetite 3.1.1. Determination of Reaction Order During the roasting of green magnetite pellets, the oxida-tion of magnetite into haematite takes place firstly, and then the newly formed haematite crystallize for the ...