Magnetite concentrate from a taconite ore of the Mesabi Range was used in this study. Sohn and coworkers [ 11, 12, 13, 14, 15, 16] investigated the reduction rates of magnetite concentrate under the conditions of the FIT.

From laboratory studies, it was found that without disturbing the induration furnace firing cycle, which is designed for hematite ore ~5%, magnetite concentrate can be used along with hematite ...

A novel flash ironmaking technology is being developed at University of Utah aiming at producing iron directly from magnetite concentrate (< 100 μm) using natural gas in a flash suspension reactor in the temperature range 1150-1600 °C. Natural gas is partially oxidized with oxygen generating a reducing gas mixture of H2 and CO as well as the heat …

High-grade magnetite and hematite have always been the most commonly used raw materials for pellet production [ 5 ]. However, in the process of pelletizing, hematite will degrade the quality of pellets, and the magnetite concentrate obtained by the enrichment process is more suitable for the production of iron ore pellets than hematite [ …

Getting magnetite concentrate with extremely high Fe grade using reverse flotation method has become increasingly important due to the enhanced requirement of iron making industry. The coagulation in magnetite-concentrate flotation system may impose negative effect on flotation performance.

Magnetite concentrate from a taconite ore of the Mesabi Range was used in this study. This concentrate is suitable for direct use in the flash ironmaking process, and contains particles of sizes less than 100 µm with a mass average particle size of …

Abstract. One of the promising methods for improving the quality of magnetite concentrate is its processing in a high-frequency alternating magnetic field, when magnetite particles are subjected ...

These technologies are designed to produce iron directly from iron concentrate without requiring pelletization/sintering and cokemaking in two significantly different temperature ranges.

Oxidation of magnetite pellet concentrates (from LKAB, Sweden) during drying and storage was studied using thermogravimetric analysis (TGA). The Fe2+content of a standard LKAB pellet feed ...

The ensuing report describes properties of bulk magnetite, illustrates techniques for synthesizing nano-scale magnetite particles, explains properties (of interest) of these nanoparticles, and discusses various applications for which nano-scale magnetite particles may be successfully utilized.

The partially reduced ore is then smelted in the second unit, and liquid iron is produced. Smelting-reduction technology enables a wide range of coals to be used for iron making. Iron processing - Ores, Smelting, Refining: Iron ores occur in igneous, metamorphic (transformed), or sedimentary rocks in a variety of geologic environments.

The presence of intergrowths of hydrogoethite with hematite and magnetite in ores can significantly reduce the iron content in the concentrate during gravity and flotation beneficiation methods.

The strength of hematite concentrate pellets was 260 kg/p. From laboratory studies, it was found that without disturbing the induration furnace firing cycle, which is designed for hematite ore ~5%, magnetite concentrate can be used along with hematite concentrate in pellet blend and the strength of the pellets was 270 kg/p.

Iron ore pellets prepared from magnetite concentrate are strengthened by oxidation of magnetite to hematite during pellet firing. In the present work, hematite whiskers were observed to grow on the oxidized surface of magnetite concentrate particles, over the entire temperature range studied (800°C to 950°C).

They are also changing the production of magnetite to use only renewable energy, undertake mining using electric battery-operated equipment and processing using renewable energy (hydro and nuclear). Sweden believes it will achieve a 'green premium' in the marketplace when selling magnetite concentrates.

The authors established that magnetite concentrate can be reduced to a degree higher than 90 pct within several seconds, which presents sufficiently rapid kinetics for a flash reduction process.

The synthesized magnetic concentrate thus obtained from the magnetization roasting process is then subjected to an agglomeration process called pelletization. In the India scenario, many pellet plants are running based on the magnetite ore as feed material for making pellets and then utilized in the steelmaking process.

Raw magnetite iron ore has a low iron content, but once it's processed into a concentrate using beneficiation, it's a high quality (65% Fe) product with low impurity levels – an ideal material for making steel …

The magnetite concentrate used in this study was collected from an ore dressing plant in China; its chemical composition is listed in Table 1. As can be seen from Table 1, the primary element was Fe, and the grade of iron was 64.86%, which is much lower than that of high-purity magnetite and iron scale. The predominant impurity was …

The Hong Kong-listed CITIC is Australia's biggest magnetite concentrate producer from its Sino Iron operation in Western Australia where it is embroiled in a royalty dispute with Clive Palmer's Mineralogy. The colourful dispute with Mineralogy aside, CITIC last month reported that it was experiencing strong demand for its 65% iron product.

Investigation of in-flight reduction of magnetite concentrate by hydrogen. In this study, hydrogen reduction of in-flight fine particles of magnetite ore concentrate at constant heat flux condition has been investigated, experimentally and numerically. A 3D turbulent mathematical model was developed to simulate the dynamic motion of these ...

Magnetite Mines' flagship Razorback Iron Ore Project is a pre-development magnetite iron ore project capable of producing high-grade and Direct-Reduction grade ("DR-grade") iron ore products required in low-carbon and zero-carbon steel production. The Project is owned and operated by ASX-listed Magnetite Mines Limited (ASX: MGT).

Due to the widespread eforts to reduce the environmental footprint of primary-route steel production, the high-grade iron ore market is growing in size and profile. Higher-purity ore types help to reduce emissions from traditional blast furnace ironmaking, while proposed routes to zero-carbon steel production rely on supply of high-grade iron ore. Increased …

Iron Bridge will produce 22 million tonnes per annum of high-grade magnetite concentrate, suitable for steel making.

Shoppert A, Valeev D, Loginova I, Pankratov D. Low-Temperature Treatment of Boehmitic Bauxite Using the Bayer Reductive Method with the Formation of High-Iron Magnetite Concentrate.

Magnetite concentrate was obtained from LKAB, and Table 1 shows particle size data. The concentrate was mixed with additives (dolomite, limestone and quartzite) and bentonite (as a binder, 0.6 ...

The results indicate that magnetite concentrates of pelletizing fineness already start to oxidize to γ-hematite during drying at 105 °C, although 105 °C is recommended by ISO 7764 and ISO 3087 ...

The impact of sulfuric acid pretreatment on the surface property of oxidized pyrrhotite (OX-pyrrhotite) and its application in flotation desulphurization of magnetite concentrate were investigated in this study. OX-pyrrhotite using sodium butyl xanthate (BX) collector performed a poor floatability. After sulfuric acid pretreatment, OX-pyrrhotite …

The growing characteristics of metallic iron particles during reductive roasting of boron-bearing magnetite concentrate under different conditions were investigated. The size of the metallic iron particles was quantitatively measured via optical image analysis with consideration of size calibration and weighted ratio of image numbers in the core, middle …

After 20 years and 20 million work hours, Fortescue Metals reports its first magnetite production at its Iron Bridge mine in WA, which measured an impressive grade of over 68 per cent iron.