Phase Development in the Sintering of a Hematite–Ilmenite Ore Blend

Abstract

The use of low-grade iron ores has attracted a lot of interest where fines from these ores are sintered to improve their strength. Ti-containing ores are one of the abundantly available iron ores of low-grade. The sintering of the hematite–ilmenite ore blends has several challenges, which include the formation of perovskite. The sintering behavior of a hematite–ilmenite ore sinter blend was investigated in 75 vol% N2, 24 vol% CO2, and 1 vol% CO in the temperature range of 1373 to 1523 K. Phase development and distribution of metallic elements were investigated by x-ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDS), and electron probe microanalysis (EPMA). The addition of ilmenite ore to hematite ore increased the temperature of melt formation. More titanium (Ti) was distributed in the glass phase with increasing temperature. Morphological change showed that the amount of sinter-bonding phase generated was low, below 1473 K. Weak sinter bonding strength might be caused by the presence of Ti in the glass phase at high temperature. This might affect the fracture toughness of the glass phase.

Determining Optimum Water Content for Iron Ore Granulation using Agitation Torque of Wet Ore Powder

“…Tomotaka OTSU, 1) Hideya NAKAMURA, 1) * Shuji OHSAKI, 1) Satoru WATANO, 1) Shohei FUJIWARA 2) and Takahide HIGUCHI 2) and operation of the granulation process is significantly important. [7][8][9][10] In wet granulation, the quantity of water to be added is a critical process parameter affecting the quality of the granules.…”

“…Recently, the use of low-grade iron ores containing higher quantities of impurities has increased owing to the significant depletion of high-grade iron ore with a high iron content. 1,2) The low-grade iron ore must be crushed to remove impurities and increase the iron content, leading to finer iron ore particles. If the fine ore particles are directly fed into the sintering process, the gas permeability of the sintering bed can decrease markedly because of the smaller particle size, resulting in the low productivity and poor quality of the final sintered ore obtained.…”

Structural studies of silica‐supported spinel magnesium ferrite nanorods for photocatalytic degradation of methyl orange

“…The results were compared to the MgFe 2 O 4 @SiO 2 standard. [47] The inter-planar distance (d): 1.259 Å, the lattice constant (a):1.32 Å, volume (V): 2.30 Å, and the X-Ray density (d x ): 23.60 Â 10 À24 g/cm 3 and the ion hopping length of the tetrahedral: 4.70 Å sites(L A ) and octahedral: 5.75 Å(L B ). A spinel phase is observed in MgFe 2 O 4 @SiO 2 nanorods due to cubic close-packed oxides with eight tetrahedral and four octahedral sites per formula unit.…”

“…[44] Muhammad Yakob [45] developed silica-supported magnesium ferrite nanomaterials that are nontoxic and biologically compatible with living organisms and are used as photocatalysts in the photocatalytic degradation of drugs [46] and methylene blue dyes. [47] The metal nanoparticles are used for photocatalytic degradation [48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63] and also for selective and aerobic oxidation of benzyl alcohol. [64,65] Herein, we report that the MgFe 2 O 4 @SiO 2 nanorods are synthesized by a simple co-precipitation method at room temperature.…”

“…[ 44 ] Muhammad Yakob [ 45 ] developed silica‐supported magnesium ferrite nanomaterials that are nontoxic and biologically compatible with living organisms and are used as photocatalysts in the photocatalytic degradation of drugs [ 46 ] and methylene blue dyes. [ 47 ] The metal nanoparticles are used for photocatalytic degradation [ 48–63 ] and also for selective and aerobic oxidation of benzyl alcohol. [ 64,65 ]…”