In this research, Fe–Si–B/carbonyl iron soft magnetic composites were prepared with the aim of having low magnetic loss and temperature-dependent characteristics. An increase in the carbonyl iron powder content resulted in an increase of saturation magnetization intensity in the Fe–Si–B/carbonyl iron hybrid powder. The …

The coarse concentrate from the first stage of magnetic separation was sorted again using the same equipment. The grinding time and magnetic field intensity were 25 min and 95.49 kA/m, respectively. ... Therefore, the reduction of iron oxides was suppressed. When the CS proportion reached 60%, metallic iron and gehlenite were …

Direct Reduction Iron Process. Abstract The article examines the impact of alkalinity, particle size, temperature, and mineral analysis on direct reduction roasting. R 0.6 is best for alkalinity, but 0.4 suits magnetic substances. Finer particle size yields higher iron grade but reduces metal recovery. Optimum calcination temperature is 1175 °C.

3.1. Direct reduction and magnetic separation. Fig. 2(a) shows the effect of reduction temperature (800, 900, 1000, 1100, 1150, or 1200°C) on the recovery and grade of iron in the concentrate. The recovery ratio and iron grade in the concentrate increased with increasing reduction temperature (Fig. 2(a)).

The use of bitumite as the reductant at a C/Fe molar ratio of 1.4 and a reduction temperature of 1200°C for 120 min resulted in direct-reduction iron powder assaying 90.28wt% TFe and 0.91wt% TiO2 ...

In this research, the mechanism of the original magnetite improving iron ore reduction during the magnetization roasting process was explored using ore fines and lump ore samples.

The results demonstrated that the reduction rate of FeOx surpassed 95% under optimal conditions including a reduction temperature of 723 K, a particle size (D90) of 0.45 μm, and an H2 flow rate ...

During the SMR process, weakly magnetic hematite and siderite in the iron ore tailings were converted to strongly magnetic magnetite with an average magnetic conversion rate of 81.71%. The SMR reactor exhibited good performance with well-functioning equipment, controllable process parameters, and the production of a high …

Utilization of plentiful fine-disseminated iron oxide ores resources attracted increasing attention in these years due to the depletion of easy-dressing iron ore reserves. In this paper, an improved Fe recovery method from the refractory fine-grained iron ores was proposed, and iron can be stepwise recovered by microwave-assisted reduction …

High-performance iron nanowires have attracted wide attention from researchers due to their 'controllable' arrangement distribution by magnetic fields. In this paper, a simple magnetic field assisted in situ reduction method was proposed to synthesize Fe NWs with high aspect ratio, small-diameter, and good dispersion.

The direct reduction iron containing 94.95% iron and 0.75% TiO2, titanium concentrate assaying 31.10% TiO2 were produced under optimal conditions, and metal recovery for both products exceeded 80%.

Iron ore tailings are industrial solid wastes generated from mineral processing. The disposal of iron ore tailings leads to environmental threat and serious security because of their tiny particle size and large storage. In this paper, suspension magnetization roasting and magnetic separation technology were utilized to recover …

beneficiation of Magnetizing reduction domestic minerals techniques. to In is an important pre-treatment process used for low-grade iron ores which are difficult to upgrade by …

Present investigation includes the magnetizing roasting of low-grade iron ore fines followed by grinding and beneficiation using magnetic separation. The hematite iron ore used in the investigation contains 53.17% T Fe, 10.7% SiO2, and 4.5% Al2O3. Powdered bituminous coal of 210 μm size with an ash content of 12.5% and fixed …

Separated preparation of prealloys and amorphous alloys results in severe solidification–remelting and beneficial element removal–readdition contradictions, which markedly increase energy consumption and emissions. This study offered a novel strategy for the direct production of FePC amorphous soft magnetic alloys via smelting …

The results show the siderite and hematite in the IGRIT have been converted to magnetic iron after the flash roasting treatment with a time of 3-5 s; magnetic iron in roasted products has a ...

Eriez Permanent Magnetic Flocculators aid in the separation of minute magnetic particles from liquids and slurries. Used widely in the iron and coal mining industries to speed settling of fine magnetic particles in ore slurries and heavy media slurries, they are finding new use in steel and other industries for agglomerating fine magnetic ...

Coal-based direct reduction (CBDR) in iron ore smelting, emerging as a prominent method in the mid-20th century, represents a significant evolution in response …

Neodymium-iron-boron (NdFeB) magnets offer the strongest magnetic field per unit volume, and thus, are widely used in clean energy applications such as electric vehicle motors. However, rare earth …

The iron ore production in India increased by 27% during 2021–22 (April–January) compared to the preceding year, indicating a heavy demand for iron in the downstream steel Abstract This communication delves into a thorough examination of the reduction roasting–magnetic separation process for a low-grade Indian iron ore that is unrespon-

Abstract: This article presents the theoretical studies and experimental validation of the vibration-generation mechanism and reduction method in linear iron-cored permanent-magnet (PM) motors at stationary state. While motor noise and vibration during moving operations have been extensively studied, such vibration issue at stationary …

Abstract. Aiming at recovering iron from high-iron-content copper slag, this article introduced a combination technology of deep reduction and magnetic beneficiation, investigated the iron ...

Consistent with the results in Fig. 21, the iron recovery rate of conventional reduction is only 54.03%, due to the production of a large amount of weak magnetic wüstite. The reduction with low gas reduction potential avoids the formation of wüstite, thus the iron recovery rate is significantly improved, reaching a good level 88.92%, and ...

Three significant input parameters are FC/O (the molar ratio of fixed carbon in coal to reducible oxygen of iron oxide in red mud), reduction temperature and …

Magnetization roasting is one of the most effective way of utilizing low-grade refractory iron ore. However, the reduction roasting of siderite (FeCO3) generates weakly magnetic wüstite, thus reducing iron recovery via weak magnetic separation. We systematically studied and proposed the fluidized preoxidation-low-temperature …

Iron ore tailings can be recycled as functional materials because these tailings are similar to natural silicate minerals. Here, we review the conversion iron ore tailings into …

The content of magnetic iron, iron carbonate, iron sulfide, and iron silicate was relatively low; therefore, the main recoverable element of iron in this sample was hematite. It is clear from Table 3 that manganese primarily existed in the form of braunite and pyrolusite, with the distribution rates of 47.95% and 44.64%, respectively.

Above 90% reduction of iron oxide to metallic iron occurred at a reduction temperature of 1000 °C in 30 min. • Increasing CaO content resulted in an increase in the strength of the pellets. • During an alkali leaching process, alumina recovery of above 75 wt% was obtained. • The grade of metallic iron improved as magnetic field intensity ...

Magnetic roasting is a possible alternative route to counter these challenges, and it has proved to produce high yields from low-grade iron ores [9]. Magnetic roasting consists of reduction ...

The reduction equipment for coal-based reduction test was a self-designed one-way heating furnace. The constant temperature zone of the one-way heating furnace was 900 mm in length, the heating rate was 20 k/min, and the working maximum temperature was 1873 K. ... Effect of microwave pre-treatment on the magnetic …