magnetic separation reduction

The result demonstrates that the iron recovery and metallization rate of coal-based reduction-magnetic separation products increased first and then decreased, while the iron grade was basically constant. When the ore size was −2.0 mm, the iron grade, iron recovery and metallization rate were the highest with the values of 77.67%, 97.21% and ...

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 …

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 …

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

Experimental procedure. The key for the reduction of ferrous oxides in present work is not only to reduce iron oxides to metallic iron but also the reduced metallic iron particles grow to big size, which is benefit for magnetic separation [].Before experiments, the high iron bauxite ore is dried at 105 °C for 5 h, and then crushed to …

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 …

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 …

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 …

The effects of reduction time on the metallized reduction–magnetic separation of low-grade saprolitic laterite ore was shown in Figure 7. As reduction time was prolonged from 2 to 6 h, the nickel recovery decreased from 76.02% to 66.66%; the iron recovery slightly increased from 79.88% to 81.60%, and then was declined to …

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 …

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

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 …

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.

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 …

Reduction−Magnetic Separation of Pickling Sludge by Biomass Pyrolysis Reducing Gas. Yane Xu, Yuanfeng Shu, Yichao Wang, Xiaoling Ren, Xinqian Shu,* Xize Zhang, Huiyun …

Up to 49.0 ± 4.7 % of v was bio-removed by pyrrhotite and magnetic recovery. • pH had a strong effect on the magnetic reduction of V(V). • Functional microbes for V(V) reduction and pyrrhotite oxidation were identified. • Roles of genes for V(V) reduction and sulfate reduction were confirmed.

Thirdly, a two-stage process involving reduction roasting and thermal growth in either a tube furnace or a rotary kiln furnace, followed by magnetic separation, was investigated. Thermogravimetric, differential thermal and mineral liberation analyses techniques were utilized to further understand the process.

Metalizing reduction and magnetic separation of vanadium titano-magnetite based on hot briquetting. Shuang-yin Chen and Man-sheng Chu. School of Materials and …

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 ...

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 ...

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%.

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 ...

As a result, several previous studies note that upgrading metallurgical solid wastes using coal-based direct reduction-magnetic separation (CBDRMS) can effectively manage metallurgical solid waste. In this process, metallurgical solid waste is converted to sponge iron using CBDR, and subsequently, magnetic separation is carried out to …

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 …

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 …

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.

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.

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 ...