The selective reduction of low-grade manganese ore followed by magnetic separation was proposed to produce rich-manganese ore. The optimized parameters include a roasting temperature of 1050°C, a ...

Magnetic separation technology, represented by high-gradient magnetic separation technology, is a critical technology that contributes to the green processing of key mineral resources. The separation mechanism, however, is considered quite scarcer, with the available reviews mainly focus on the application of high gradient magnetic …

Figure 4-25 Plots of ln kapp,co versus ln Pco at various CO contents, T = 600˚C, ( kapp,co in min-1) - "Prereduction and magnetic separation of low grade manganese ore" Skip to search form Skip to main content Skip to account menu. Semantic Scholar's Logo. Search 214,033,382 papers from all fields of science ...

5 Examples of Magnetic Separation: Magnetic drum separator: A drum-shaped magnet that separates ferrous material from non-magnetic material. It is commonly used in recycling, mining, and the steel industry …

high-iron red mud. The methods can be summarized as physical separation, reduction roasting–magnetic separation, and acid leaching, mainly including high …

Under the optimal roasting and grinding-magnetic separation conditions (roasting at 800 °C for 15 min, then separation with a magnetic field intensity of 119.4 kA/m and a grinding fineness where 88% of the particles were smaller than 38 μm), the iron recovery could be obviously improved when a pre-oxidation process was applied (From …

In order to get rid of smelting in blast furnace and converter, Chen et al. developed the 'selective prereduction – magnetic separation – hydrochloric acid washing' process (Chen et al., 2002). After selective prereduction and magnetic separation, the Nb concentrate was washed with hydrochloric acid for removal of the iron, phosphorous ...

Each magnetic separation test produces three fractions, a primary magnetic fraction, a secondary magnetic or 'middling' faction and a non- to weakly-magnetic tail. XRF analysis for Mn, Fe and SiO 2 was conducted on the feed samples, all three test fractions for each test and on the two −0.6 mm fractions and the −0.075 mm ultrafines ...

Magnetic separation is primarily used in solid waste treatment systems to recover or enrich ferrous metals, or in certain processes to remove ferrous materials from solid waste. …

Magnetic Separation Tests The reduced ore (feed) was subjected to wet low intensity rotary drum magnetic separator (Sala, Italy) having permanent magnets for separation of magnetic minerals form associated gangue minerals. The drum dimensions were 200 mm dia × 100 mm width. The intensity of magnetic field (strength) was set at 1000 gauss.

The magnetic separation results for the DRI samples obtained via the use of different additives (CaO, Na 2 CO 3, Na 2 SO 4, or FeS 2) are shown in Fig. 3. As shown in the figure, the magnetic separation results for the samples prepared using CaO and Na 2 CO 3 as the additives are less favorable than for the samples prepared using the …

Magnetic separation methods were also carried out for the ferrochrome industry wastes such as the flue dust to find out the possibilities of partial recycling and or for the recovery of metal and chromite of significant value [16]. Magnetic separation is a simple, inexpensive, non-destructive and rapid means of concentrating iron-bearing ...

More importantly, a relatively low pre-reduction temperature and selection of magnetic separation process were found to be more beneficial for chromium enrichment in slag; the highest chromium–iron ratio in tail slag can reach 2.88. Keywords: chromium …

Figure 3-3 The effect of temperature with 25 min reduction time at 30% CO: (a) % of Fe removed; (b) Mn/Fe achieved by magnetic separation; (c) % of Mn lost - "Prereduction and magnetic separation of low grade manganese ore"

In particular, the abundant low-grade manganese ores, which contain iron oxide, may be upgraded by prereduction and magnetic separation. In this study, ferruginous low-grade manganese ore was prereduced by CO, which converted iron oxide to Fe3O4 while manganese oxide was reduced to MnO. Then, the iron-rich component was collected by …

the magnetic strength of which was 870 Gauss. This magnet strength was selected based on test results[8] which indicated that a stronger magnet would attract weaker magnetic manganese oxide (Mn 3O 4) together with the magnetite and that a weaker magnet takes much effort, thus longer time, to effect the separation.

At this time, iron minerals could be effectively recovered by a grinding and low-intensity magnetic separation process. Under the optimum roasting and magnetic separation conditions, the iron grade of magnetic concentrate reached 66.40 %, the iron recovery was 92.44 %, and the sulfur content decreased significantly from 0.547 % to …

The utilization of low-grade manganese ores has become necessary due to the intensive mining of high-grade ores for a long time. In this study, calcined ferruginous low-grade manganese ore was selectively reduced by CO, which converted hematite to magnetite, while manganese oxide was reduced to MnO. The iron-rich component was …

In particular, the abundant low-grade manganese ores, which contain iron oxide, may be upgraded by prereduction and magnetic separation. In this study, ferruginous low-grade manganese ore was prereduced by CO, which converted iron oxide to Fe3O4 while manganese oxide was reduced to MnO. Then, the iron-rich component was collected by …

Effective and economical treatment of low-grade nickel laterite by a duplex process of direct reduction-magnetic separation & rotary kiln-electric furnace and its industrial application. ... the briquettes were charged into rotary kiln (Φ5.2 m × 118 m) for prereduction at 750 °C–1000 °C for 2–3 h, and then the hot delivery and hot ...

The metallic iron particles aggregate and grow, and the particle size continuously increases to be suitable for magnetic separation. The optimization and application of coal-based reduction have ...

Figure 4-14 Time-reduction extent curves for the isothermal reduction of calcinated "LP" ore at different temperatures, CO content = 30 vol% - "Prereduction and magnetic separation of low grade manganese ore"

The basic idea of reducing carbon footprint and improve magnetic energy utilization. • Advanced design of the magnetic system and the distribution of the …

There are several physicochemical differences among the components in manganese ores, which can be used for the enrichment of manganese. In particular, the abundant low-grade manganese ores, which contain iron oxide, may be upgraded by prereduction and magnetic separation. In this study, ferruginous low-grade manganese ore was… Expand

concentrate by magnetic separation after pre-reduction in a rotary kiln. Neverthe-less, to avoid forming a ring against the wall of the kiln, it becomes difficult to enrich and …

Magnetic separation: A review of principles, devices, and applications. Abstract: Conventional magnetic separation devices are widely used for the removal of tramp …

Magnetic separation is an effective strategy for the upgrading of a variety of lean ores, including the beneficiation of low-grade manganese ores. This work reviews 24 studies on the magnetic separation of manganese ores; 6 of these studies report both a sufficiently high Mn grade (>44% Mn) and Mn/Fe ratio (>7.5) in the concentrate as to be ...

The reduced ore was then upgraded by magnetic separation, 75 per cent of the total mass being rejected as tailings, and a high grade nickel concentrate, assaying 5.1 per cent Ni and 82.66 per cent ...

The magnetic separation concentrate and weakly magnetic titanium concentrate were separated using a Davis magnetic tube with a magnetic field strength of 127 kA/m. Subsequently, the magnetic concentrate was ground to −45 μm, accounting for 60.19%. The direct reduction iron and gangue were separated by the same magnetic …

In the absence of the microparticle inertial mass acceleration, and the fluid friction force assumed directly proportional to the microparticle velocity relative to the bulk velocity of …