PWM Carrier Harmonic Iron Loss Reduction Technique of Permanent-Magnet
This paper investigates a method to increase fuel economy of motors for an electric vehicle (EV) traction system. The low-torque region of an EV motor is frequently used in everyday urban driving and in fuel economy measurement. Pulsewidth modulation (PWM) carrier harmonic iron loss accounts for a high percentage of total loss for EV motors in this …
Separation of manganese and iron for low-grade …
— 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 ...
Beneficiation of Low-Grade Hematite Iron Ore …
— 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, …
SGM MAGNETICS
The SGM MIMS separator features an innovative proprietary magnetic circuit that results in a unique substantially homogeneous (both axially and radially) high magnetic field and high gradient along its whole magnetic …
Recycling of iron ore tailings into magnetic nanoparticles …
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 …
A new approach for recovering iron from iron ore tailings …
— In this study, a pilot-scale experiment on the iron recovery from iron ore tailings was investigated using innovative technology of pre-concentration and …
The six main steps of iron ore processing
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 ...
Recovery of iron from copper tailings via low …
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
Beneficiation of Low-Grade Hematite Iron Ore Fines by …
— 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
iron magnetic reduction equipment
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 Filing Removal Machine
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 …
Loss analysis of high-speed permanent magnet motor based …
— 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 ...
Comprehensive recovery of lead, zinc, and iron from
— Lead, zinc, and iron were recovered from jarosite residues using direct reduction followed by magnetic separation. The influence of the coal dosage, reduction temperature, and reduction time on the volatilization rates of lead and zinc and the metallization rate of iron were investigated. The results show that the volatilization rates …
Sustainable processing of gold cyanide tailings: Reduction …
— 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 ...
Recovery of Iron from Copper Tailings Using a Combined …
— Using direct reduction–magnetic separation technology to recover iron resources in copper slag has fair recovery effect and short reaction time, which is the …
What Are Magnetic Water Softeners & Do They Work?
— 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.
Mechanism for suspension magnetization roasting of iron …
— Selective enrichment of iron particles from complex refractory hematite-goethite ore by coal-based reduction and magnetic separation. Powder Technol, 367 (2020), pp. 305-316. ... Enhancement of magnetic properties of Malaysian iron ore by reduction roasting using oil palm empty fruit bunch. ISIJ Int, 54 (4) (2014), pp. 994-996. …
The Preparation of High-Purity Iron (99.987%) Employing a …
— 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.
An innovation for strengthen iron extraction from …
— 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
Efficient Separation of Iron and Alumina in Red Mud Using Reduction …
— 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 …
Comparing strategies for iron enrichment from Zn- and Pb …
— The schematic illustration of iron enrichment from refractory iron ore through reduction roasting-magnetic separation is presented in Fig. 12. Therefore, deep reduction-magnetic separation seems to be a suitable method for enriching iron from Zn- and Pb-bearing refractory iron ore. Download: Download high-res image (348KB)
Magnetic Separation Equipment
These self-cleaning magnets remove tramp iron and purify material conveyed in bulk form. Magnetic Separators can replace or retrofit existing equipment to turn your material handling conveyor into a material …
Direct Reduction Iron Process
— As shown in Fig. 2.2, the higher the direct reduction temperature, the smaller ΔG Ө, indicating that the reduction reaction is more likely.Fe 3 O 4 in copper slag can be easily reduced to metallic iron, and Fe 2 SiO 4 can also be reduced to metallic iron when the direct reduction temperature is higher than 1036.7 K. If CaO is added in the direct …
Low intensity magnetic separation of vivianite induced by iron
— Low intensity magnetic separation with iron scrap would recover P resources economically with the total cost to be $2.23/kg P, which was much lower than recovery via iron salts. ... the high cost and abrasion of centrifugal equipment limited the wide industrial application of density separation. Magnetic separation is based on the paramagnetism ...
Separation and Recovery of Rare Earths and Iron …
— 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 ...
Recent Advances in Magnetization Roasting of Refractory Iron …
— After magnetization roasting, the weakly magnetic iron minerals, including hematite, limonite and siderite, are selectively reduced or oxidized to ferromagnetic magnetite, which is relatively ...
Life Cycle Assessment of Neodymium-Iron-Boron Magnet-to-Magnet …
— 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 elements (REEs), which are the key materials for creating NdFeB magnets, have been subject to significant supply uncertainty in the past …
H2-REDUCTION OF BAUXITE RESIDUE AND IRON RECOVERY THROUGH MAGNETIC
— 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 ...
Innovative utilization of refractory iron ore via suspension
— Refractory iron ore samples were obtained from the Jiuquan Iron and Steel Corporation in Gansu Province, China. The main chemical composition and iron phase composition of the samples are presented in Tables 1 and 2, respectively.The results indicated that iron is the most valuable element for recycling, with a total iron grade …
A new approach for recovering iron from iron ore tailings …
— Iron ore tailings, which are important secondary resources, have outstanding latent application value in iron recovery. In this study, a pilot-scale experiment on the iron recovery from iron ore tailings was investigated using innovative technology of pre-concentration and suspension magnetization roasting (SMR), followed by magnetic …
High-aspect-ratio iron nanowires: magnetic field-assisted in …
— 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 …
Fluidized bed roasting technology in iron ores dressing in …
— 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 ...
Rotary Kiln in Magnetic-Reduction Roasting
— 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 …
Direct Reduction Equipment
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 …
A new approach for recovering iron from iron ore tailings …
— 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].
Recovery of iron from copper slag via modified roasting in …
— 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 …