— In this work, diboron xide and calcium fluoride are applied as composite additives to explore a process suitable for processing low-grade, high-vanadium, ultra-high-titanium vanadium–titanium magnetite. The metallized coal-based direct reduction–electromagnetic separation experiment was conducted. Results show that a …

 — Other scale forming salts involve a variety of compounds with low solubility in water, such as MgCO 3, BaSO 4, Fe 2 (CO 3) 3, iron oxides, silicates, fluorides, and phosphates 7,13.

Following is a list of major pieces of equipment: Reduction Zone – the reduction zone of the vertical reactor primarily removes oxygen from the iron ore with the reducing gases. Quench Tower – the quench tower …

There are several permanent magnetic equipment/devices available for iron separation purposes. They are magnetic drums, magnetic pulley, magnetic grill, magnetic plates, over band magnets, etc. All these equipment are …

The modelling work has been primarily focused on the direct reduction of iron ore to metallic iron. ... converted to magnetic iron after the flash roasting treatment with a time of 3-5 s; magnetic ...

 — recovery rate of 85.61% by employing coal-based reduction on goethite iron ores, followed by magnetic separation.13 Direct reduction experiments on goethite ores frequently yield favorable iron recovery rates while maintaining efficient process flow.Nonetheless, It is essential to emphasize that

 — A novel technology, modified roasting in CO–CO2 mixed gas and magnetic separation, was presented to recover iron from copper slag. The effects of various parameters such as dosage of flux (CaO), gas flowrate of CO and CO2, roasting temperature, roasting time, particle size of modified slag and magnetic flux density on …

 — Literature Cai and Zhao (2020) take the built-in V-type PMSM as an example, decompose the stator region magnetic density orthogonally, solve the stator core loss by using the variable-coefficient iron loss calculation model, increase the distribution range of the motor high efficiency zone by adjusting the size of the permanent magnet, and ...

dosage of 2.5%, a magnetic field intensity of 100 mT, and a grinding time of 1 min. Under these conditions, the iron grade in the magnetic concentrate was greater than 90%, with an iron recovery ratio greater than 95%. Keywords: copper tailings; iron; direct reduction; magnetic separation; recovery; process optimization 1. Introduction

 — The magnetic susceptibility of cast iron can be quantified using the following formula: χ = M / H Where: – χ is the magnetic susceptibility of the material – M is the magnetization of the material – H is the applied magnetic field The magnetic susceptibility of cast iron can vary depending on the specific composition and microstructure of the …

 — Recent pilot testing conducted by Zhong demonstrated the production of hematite ore powder with an impressive overall recovery rate of 85.61% by employing coal-based reduction on goethite iron ores, …

Iron ore tailing is a major solid waste requiring advanced recycling methods because ore tailing powder is polluting air and water resources. For instance, about 300 million tons of tailings are disposed yearly in 1229 iron ore tailings dams in the Hebei province in China. Iron ore tailings can be recycled as functional materials because these tailings are …

The iron recovery rate and total iron content in magnetic product could be up to 98.37 and 82.52%, respectively, under the numerically optimal process parameters condition of reduction temperature of 1400 °C, FC/O of 0.80 and reduction time of 100 min obtained by the assessment model. ...

iron from titanomagnetite [28], the effect of CaF2 on the sep-aration of iron and phosphorus has rarely been investigated. In this study, the effects of CaCO3, Na2CO3, and CaF2 on the direct reduction–magnetic separation of high-phosphorus iron ore was compared in detail, and the discrepancy in de-

 — In addition, at present, the most widely used reduction roasting equipment is the reverberatory furnace and rotary kiln. The reverberatory furnace has the problems of low output, high energy consumption and serious environmental pollution. ... Too high a temperature will lead to the reduction of iron oxide to weakly magnetic pumice. In this ...

 — 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 …

 — The recovery changed only slightly owing to the newly generated strong magnetic iron ore, which was partially reduced to weaken the magnetic iron ore that then entered the magnetic separation tailings. This resulted in a reduction of the manganese grade of the manganese concentrate. 4.3. Effect of CO content

 — A new iron recovery and dephosphorization approach from high-phosphorus oolitic iron ore via oxidation roasting-gas-based reduction and magnetic separation process Powder Technol., 413 ( 2023 ), Article 118043, 10.1016/j.powtec.2022.118043

 — The content of magnetic iron in the calcine from reduction roasting (RRC) was determined by magnetic separation. The leaching conditions of gold in the non-cyanide system are ... The wear and tear costs of mechanical activation equipment and zirconium beads were 3.2–3.8 US dollars perton. In the gold leaching stage, using a non-cyanide ...

 — Smelting reduction and direct iron reduction can reduce energy input, lower greenhouse gas emissions and minimize slag byproduct generation, resulting in overall cost, productivity and life cycle …

 — Gibbsite-type bauxite is the main material for alumina extraction by Bayer process globally, while the iron in red mud is difficult to use for the high alumina content. Therefore, the efficient separation of iron and alumina is the premise for the resource utilization of red mud. In this work, the separation of iron and alumina in red mud …

 — In this study, an approach of producing high-purity iron is proposed via a direct reduction of iron ore–melting separation–refining process, by which high-purity iron with purity up to 99.987% can be produced on a large scale with low cost.

It is immediately directed to a magnetic separator circuit. Magnetised drums collect magnetic material, so it can be further concentrated (magnetite iron minerals content). The lighter particles that were separated during the spiral gravity separation step are rolled into balls (combined with bentonite or a similar binding agent) and cooked in ...

 — The iron recovery and grade of magnetic rich fraction after water leaching-magnetic separation of reduced BR (at 500 °C, 20 wt % NaOH, 30 min reduction time) is 87.7 % and 44.5 % respectively ...

 — Magnetic-reduction roasting is a process in which non-magnetic ore is converted by the action of reducing gases to a state in which subsequent magnetic. ... Heat exchange equipment is also being designed for use with a hot central gas system. By using the producer gas hot without quenching a 5% fuel savings is reported by Hamilton on a …

 — Similarly, under a weak reducing atmosphere with the CO content of 1.0% at 800 °C, the gold tailings containing 27.30% iron was treated via this equipment followed by a three-stage grinding ...

 — The study found that magnetic water treatment could reduce an average of 34% scale, with test results ranging from 17-70% scale reduction in heated storage tanks. The tanks containing untreated water had visible scale on the base and heating evidence.

 — 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, a …

 — Using direct reduction–magnetic separation technology to recover iron resources in copper slag has fair recovery effect and short reaction time, which is the …

 — This novel technique can easily achieve the transformation of weakly magnetic iron minerals to ferromagnetic iron minerals in a suspended state using a reducing gas [23]. It possesses the characteristics of large processing capacity, low reduction temperature, low roasting energy consumption, and efficient recycling of energy [24].