Low intensity magnetic separation of vivianite induced by …
The inner component of the structure 'vivianite[Fe(0)]' was ZVI, which made it possible for low intensity magnetic separation. After applying a magnetic separator with magnetic field intensity of 0.3 T, the vivianite[Fe(0)] was separated from liquid phase successfully and instantaneously. Besides, the iron 'core' can be magnetized to ...
Magnetic Separation
3.11.2.5 Magnetic Separation. Magnetic separation is a process where a contaminant is first attached onto a magnetic carrier material (e.g., magnetite), and subsequently, the contaminant-laden carrier is separated under a magnetic field. The simplest magnetic separator is a permanent magnet.
Utilization of nickel slag using selective reduction followed …
This indicates that the reduction rate and the aggregation of reduced metals are essential to provide a satisfactory recovery during grinding magnetic separation as high temperature is beneficial to reduction and the growth of metallic particles [19]. 3.3 Effect of reduction duration on selective reduction magnetic separation Under the ...
Materials | Free Full-Text | Arsenic Removal and Iron …
Through grinding and secondary magnetic separation, the iron minerals and gangue components, as well as arsenic, in roasted sand can be further separated. The optimum procedure results in a high-grade iron concentrate with an iron assay of 65.65%, an Fe recovery rate of 80.07%, and an arsenic content of 0.085%, while achieving a …
Recovery of iron from vanadium tailings with coal-based …
A technique with coal-based direct reduction followed by magnetic separation is presented in this study for recovering and reusing iron otherwise wasted in vanadium tailings. Process parameters such as usage of additives, tailings/reductant/additives ratio, reduction temperature and time, as well as particle size …
[PDF] Innovative process for preparing ferronickel materials …
An innovative process for preparing ferronickel materials from laterite ore by reduction roasting-magnetic separation in the presence of additives was proposed,and the effect of additives on reducing roasting-magnetic separation of laterite ore and the technical parameters of roasting and magnetic separation were investigated.The results show …
Harmless treatment and resource utilization of
The temperature of reduction was 1473 K, which was lower than the existing process temperature (1673 K). Then, the reduction product was subjected to magnetic separation, whose efficiency is high, to separate metals and nonmetals. Consequently, the metal alloy powder (Ni + Cr + Fe) and nonmetallic phase, which were …
Behavior of Fe and P during reduction magnetic roasting-separation …
ABSTRACT Fe–P separation and the behaviors of Fe and P in separation process of high-phosphorus oolitic hematite ore from western Hubei province in China were studied. Various parameters, including reducing temperature and time, dosage of the pulverized coal, grinding fineness of magnetic separation feed, magnetic field intensity …
Effects of embedding direct reduction followed by magnetic separation …
Sun et al. [25, 26] proposed the coal-based direct reduction-magnetic separation method to recover iron and titanium from sea sand ore and conducted related research to verify the feasibility of ...
Recovery of iron from copper tailings via low-temperature …
Currently, the majority of copper tailings are not effectively developed. Worldwide, large amounts of copper tailings generated from copper production are continuously dumped, posing a potential environmental threat. Herein, the recovery of iron from copper tailings via low-temperature direct reduction and magnetic separation was …
Separation of Iron and Phosphorus from High-Phosphorus …
The dephosphorization process of high-phosphorus iron ore mainly includes roasting magnetic separation, strong magnetic separation, flotation process, selective agglomeration separation, combined process, and other methods . In recent years, a lot of research has been done on the theory and technology of phosphorus reduction in high …
Separation of Iron and Zinc Values from Blast Furnace …
2.2 was kept higher than the two magnetic poles. After the magExperimental Methods The experiment process is mainly divided into grinding, reduction roasting, and magnetic separation, and the ow diagram is shown in Fig. 2. The BFD and sawdust were ground separately by a rod mill (XMB-70, Φ75 × 148) at 400
Application of Coal-based Direct Reduction-Magnetic Separation …
@article{Xu2023ApplicationOC, title={Application of Coal-based Direct Reduction-Magnetic Separation Process for Recycling of High-Iron-Content Non-Ferrous Metallurgical Wastes: Challenges and Opportunities}, author={Xianqing Xu and Zheng-qi Guo and De‐qing Zhu and Jian Pan and Cong-cong Yang and Si-wei Li}, …
Enhancing Reduction Separation and Efficient Recovery of …
The effect of reduction temperature on metallization reduction–magnetic separation was investigated under the 8 pct diboron trioxide additive content, 8 pct calcium fluoride additive content, reduction time of 30 min, and magnetic field intensity of 200 mT, and the results are shown in Figures 6 and 7. The metallization ratio continued to ...
Chromium and iron recovery from hazardous extracted
Iron, chromium, and sodium were simultaneously removed from the extracted vanadium tailings using a calcium reduction roasting and magnetic separation process. A schematic diagram of calcium reduction-magnetic separation process is shown in Fig. 2. First, the samples were dried in an oven at 105 ℃ for 4 h, weighed, and then placed in a ...
Pyrrhotite-dependent microbial reduction and …
This study investigated the effectiveness of natural pyrrhotite in immobilizing V(V) in aquifers and the feasibility of magnetic separation. The following conclusions could be drawn: • The ability of pyrrhotite to bioreduce V(V) to insoluble V(IV) was confirmed …
Recovery of Fe and V via selective reduction–magnetic …
for the magnetic separation of Fe and V. Magnetic products with an Fe content of 87.19%, Fe recovery of 82.62%, V content of 0.09% and non-magnetic products with a V content of 1.00% and a V recovery
Magnetic Separation: Principles, Devices, and …
Magnetic separation, thanks to its advantages of large processing capacity, low operation cost, high efficiency and applicability, and environmental friendliness in comparison to other separation …
(PDF) Reduction–Magnetic Separation of …
The results showed that when the reaction temperature was 680 °C, the corncob dosage was 5%, the residence time was 20 min, and the magnetic field strength was 200 mT, the recovery rate of iron ...
Recovery of iron from copper tailings via low-temperature …
In order to recycle iron from copper slag with total iron content (TFe) of 39.96%(mass fraction), a technique with lignite-based direct reduction followed by magnetic separation was presented.
(PDF) Review on coal-based reduction and magnetic separation …
Coal-based reduction followed by magnetic separation is proposed, which adopts coal as the reductant to reduce iron oxides to metallic iron below the melting temperature. The metallic iron ...
A study of reduction and magnetic separation of iron from …
The reduction sample was subjected to magnetic separation and a non-magnetic product (aluminum concentrate), with alumina recovery of 80.64% and iron removal of 85.32%, was obtained.
Coal-Based Reduction and Magnetic Separation Behavior …
Coal-based reduction and magnetic separation behavior of low-grade vanadium-titanium magnetite pellets were studied in this paper. It is found that the metallization degree increased obviously with an increase in the temperature from 1100 °C to 1400 °C. The phase composition transformation was specifically analyzed with X-ray …
Magnetic Separation: A Comprehensive Overview
Magnetic separation is a physical separation technique that exploits the difference in magnetic properties between materials to achieve separation. It has been applied in …
Reduction–Magnetic Separation of Pickling Sludge by …
2.3. Experimental Methods: Pyrolysis–Reduction Roasting and Magnetic Separation. All reduction roasting experiments were conducted in an electric furnace. Figure Figure2 2 shows a schematic diagram of the experimental device during pyrolysis–reduction roasting. A total of 10 g of an SHPS sample was thoroughly mixed …
Materials | Free Full-Text | High-Grade Ferronickel …
In a word, after carbothermal reduction and magnetic separation, high-grade magnetically separable ferronickel concentrates were successfully prepared by using laterite nickel ore, anthracite, and CaF 2 as raw materials, and the sample C1.4-F12 exhibited the highest iron grade of 63.96 wt% and nickel grade of 8.93 wt%.
High-Titanium Slag Preparation Process by Carbothermic Reduction …
Therefore, based on previous studies, semi-molten reduction of ilmenite, followed by wet grinding and magnetic separation of slag from iron, was conducted to produce UGS with low-grade ores. This study aims to investigate the effect of Na 2 CO 3 on the semi-molten reduction of ilmenite and the separation behavior of slag from iron.
A new iron recovery and dephosphorization approach from …
Recently, a reduction roasting–magnetic separation process was proposed to simultaneously achieve high-efficiency iron recovery and deep phosphorus removal [18, 19]. High-valence iron-containing substances were converted into the corresponding the elemental states. Concurrently, the reduction of phosphorus-containing minerals was …
Comprehensive Reclamation of Valuable Metals from Au …
Comparatively, carbothermic reduction at 1400 °C for 4 h led to slag formation bearing only 7 wt% Fe (Point 9 in Fig. 11), indicating a higher degree of reduction. Magnetic Separation. The reduced pellets obtained from carbothermic reduction at 1250 °C for 4 h were subjected to magnetic separation to test the …
Reduction Magnetic Separation of Pickling Sludge by …
reduction roasting−magnetic separation of an iron ore slime sample with 56.2% Fe. Their findings showed that iron ore concentrates with ∼65% Fe and ∼64% weight recovery were obtained with reduction conditions including a temperature of 650−750 °C, a reductant-to-feed ratio of 0.15, a residence time