Apatite minerals are readily floated using anionic collectors such as fatty acids. At LKAB (Luossavaara-Kiirunavaara AB) in Kiruna, Sweden, the dephosphorization of a magnetite ore is conducted using magnetic separation and flotation. In the flotation process, the apatite minerals are floated with a fatty acid based collector.

In this study, bio-inspired urchin-like structured hydroxyapatite (UHdA) and its magnetic composite ([email protected]3O4) were developed for efficient and easy separation of cerium ions (Ce³ ...

Magnetic mineral inclusions in silicates are widespread in sediments as well as in igneous rocks. Because they are isolated from surrounding environment, they have potential to preserve original magnetic signature even in chemically altered sediments. Such inclusions may provide proxies to help differentiating the source of the host silicate. …

A patent was awarded in England on a process for separating iron minerals by means of a magnet in 1792, and in this country a separator having a conveyor belt for presenting ore beneath electromagnets excited by cells was employed in separating magnetite from apatite in New York State in 1852. The earlier attempts at magnetic …

To improve the magnetic separation efficiency, several novel separation system based on magnetic NPs have been developed, such as Fe 3 O 4 @SiO 2 @P(St-MA)/Ni-NTA ... and the composite coatings were found to enhance the apatite mineralization, as affirmed by SEM-EDX analysis. The assessment of hemocompatibility …

This chapter introduces the principle of how low-grade iron ores are upgraded to high-quality iron ore concentrates by magnetic separation. Magnetite is the most magnetic of all the naturally occurring minerals on earth, so low-intensity magnetic separators are used to upgrade magnetite ores. ... Apatite: 0.007–0.142: Ca 5 (PO4) 3 …

Hierarchical Fe 3 O 4 @Cu-apatite nanoparticles (NPs) were synthesized via a facile hydrothermal method.The Fe 3 O 4 cores present spherical shape and have a mean diameter of 300 nm, and the Cu-apatite shell with thickness of about 50 nm is composed of a large number of sheets. Using the high affinity of Cu 2 + on the surface toward histidine …

Magnetic behavior of apatite-type compounds is discussed in view of their bond lengths. Introduction Rare earth ions, together with the alkaline earth and lead ions, are known as apatite- building cations. They were investigated in different apatite systems in connection with the use of rare earth-substituted apatites as laser materials and in ...

Separated preparation of prealloys and amorphous alloys results in severe solidification–remelting and beneficial element removal–readdition contradictions, which markedly increase energy consumption and emissions. This study offered a novel strategy for the direct production of FePC amorphous soft magnetic alloys via smelting reduction …

The standard approach to selecting apatite and zircon grains for geo- and thermochronology is to (1) crush and grind rock samples into their mineral constituents; (2) perform magnetic and density separation …

Open access. Published: 17 October 2022. Genetic model of the El Laco magnetite-apatite deposits by extrusion of iron-rich melt. Tobias Keller, Fernando Tornos, John M. …

Under the optimal conditions: coke dosage of 6%, reducing temperature of 1400 °C and time of 120 min, a magnetic concentrate with 4.18% Nb, 4.60% Ti and 70.57% Fe can be obtained followed by wet magnetic separation. The corresponding recoveries of Nb, Ti and Fe were 70.5%, 59.8% and 92.6%, respectively.

The magnetic separation results indicated that Mo and Cu were enhanced in magnetic products by 34–41 and 15–21%, respectively. Cleaner non-magnetic residues were found to decrease significantly by 37–44, 58–60, and 11–19% for Cu, As, and Cr, respectively. Mineral fractionation was observed instead of chemical changes during …

These minerals are generally separated by flotation and/or magnetic separation (in the case of iron impurities). Calcite ores typically contain metal sulphide, silicate, or other calcium-containing impurity minerals, which can be removed by flotation. ... Holmberg K (2015) Flotation selectivity of novel alkyl dicarboxylate reagents for apatite ...

All samples were analyzed for whole-rock geochemistry, LA-ICP MS apatite U-Pb dating, and apatite geochemistry. After crushing the rock samples, apatite grains were separated by standard heavy liquid and magnetic separation techniques, and then handpicked under a binocular microscope, mounted in an epoxy resin, and polished.

During SMR, the limonite transformed into magnetite with strong magnetism, and structures of iron ore became loose and porous. These changes enhanced the effect of magnetic separation and separation of apatite from magnetite. In general, this work provides a fresh approach to the efficient utilization of high-phosphorus waste limonite.

Multi-heavy mineral separation techniques like density, magnetic, and electromagnetic techniques are followed by picking, grain counting, and mineralogical examinations conducted with an ...

The characteristics of siderite reductive ore and the ultrafine grinding-magnetic flocculation separation (MFS) of this ore were investigated in the present work. The results indicated that the iron phase in the raw ore was predominantly metallic iron with an iron particle size below 30 μm, and the phosphorus compound was apatite. By …

Three different types of heavy liquids and a magnetic separator (Frantz) can be found in the mineral separation room. This room is mostly used for separating heavy minerals - like zircon, monazite and apatite - from lighter minerals. Zircon and monazite are important minerals for U/Pb dating with the help of laser ablation and a mass spectrometer.

After crushing the rock samples, apatite grains were separated by standard heavy liquid and magnetic separation techniques, and then handpicked under a …

The effectiveness of the smelting process is based on the quick and efficient separation of immiscible layers and the separation of the matte from a slag containing …

During coal-based reduction, the iron minerals were reduced to metallic iron and grew into the metallic phase. The apatite was also reduced and enriched in the metallic iron phase. After two-stage grinding and magnetic separation, a P-rich DRI powder of 93.26% Fe and 1.62% P was obtained with 93.41% Fe recovery and 71.27% P recovery. …

Deep dephosphorization of high‑phosphorus oolitic iron ore (HPOIO) is extremely difficult because of its refractory characteristics. A new approach for simultaneous iron recovery and dephosphorization from HPOIO by oxidation roasting–gas-based reduction (ORGR) and magnetic separation process was developed.The underlying …

apatite to the slag, gas phase, and metallic iron. Results indicated that the optimal experimental conditions for achieving high recovery ratios of metallic iron and high ...

Iron ores are associated with undesirable gangue minerals such as silica, clays, alumina, calcite and apatite. Standard physicochemical methods such as froth flotation and gravity separation (spiral concentrator, jigging, heavy media separation) used to separate the gangue minerals from hematite are considered to be expensive and are …

Physical methods such as gravity concentration, magnetic separation and flotation are standard practices to separate the gangue minerals from iron ores. However, the ores …

The concentrate was further upgraded by magnetic separation, leading to 54.0% available alumina, with an alumina/insoluble silica mass ratio of 12.6 at an …

DOI: 10.1016/j.jinorgbio.2015.12.017 Corpus ID: 1147659; Selective binding and magnetic separation of histidine-tagged proteins using Fe3O4/Cu-apatite nanoparticles. @article{Li2016SelectiveBA, title={Selective binding and magnetic separation of histidine-tagged proteins using Fe3O4/Cu-apatite nanoparticles.}, author={Ping Li and Liangliang …

Materials. Pure quartz (> 99% SiO 2) and magnetite (> 96% Fe 3 O 4) samples (Fig. 1) were obtained from VWR, Sweden.The samples were ground using a laboratory-scale ball mill to produce flotation feed

Kiruna geology and magnetite-apatite ores. There are over 40 known magnetite-apatite deposits located in the Norrbotten region, with Kiirunavaara being the largest estimated at nearly 2 Gt before extraction of high-grade iron ore averaging 30–70% Fe (e.g., Cliff et al. 1990; Hallberg et al. 2012; Martinsson et al. 2016; Westhues et al. …