Magnetic Separation and Recycling of Goethite and …
Goethite (α-FeOOH) and calcium sulfate (CaSO4·2H2O) are the main solid constituents of the iron oxide residues in zinc hydrometallurgy by the goethite process. Impounding these residues in tailings ponds is costly to maintain and causes a great threat to the local environment. In this study, magnetic separation was applied to separating goethite …
Magnetic particles for the separation and purification of …
Enrichment of low-grade iron ore, removal of ferromagnetic impurities from large volumes of boiler water in both conventional and nuclear power plants, or the …
Iron Recovery from Bauxite Residue Through Reductive
The scope of this work is to develop and optimize a reductive roasting process followed by wet magnetic separation for iron recovery from bauxite residue (BR). The aim of the roasting process is the transformation of the nonmagnetic iron phases found in BR (namely hematite and goethite), to magnetic ones such as magnetite, wüstite, …
Comprehensive Recovery of Iron and Aluminum from …
Iron and aluminum in red mud were recovered by a reductive sintering–magnetic separation–digesting process. The raw materials were composed of ordinary Bayer red mud, MgO, Na2CO3 and C, in which MgO and Na2CO3 were used as mineralizing agents, and C as a reductive agent. Sintering orthogonal experiments …
Disc Magnetic Separator Applied to the Extraction of …
To recover iron oxides from bauxite residue, magnetic separation has been considered in several instances. However, because hematite and goethite are Fe(III) species with low magnetic susceptibility values of 1 and 0.4 × 10 −6 m 3 /kg respectively [ 2 ], high gradient superconducting magnets producing a magnetic intensity of more than …
An Investigation on Reduction of Calcium Added Bauxite Residue …
This study investigates the properties of H2-reduced calcium-added bauxite residue, self-hardened pellets, and the feasibility of iron recovery through electrostatic and magnetic separation methods. The oxide pellets are prepared via a mixing of bauxite residue, calcite, and quicklime. The self-hardened pellets are reduced at 1000 °C with …
Magnetic separation of serpentinite mining residue as a …
The present study investigates the magnetic separation of serpentinite residue from Québec to produce a non-magnetic feed stock for mineral carbonation. This study also scrutinizes the quality of the magnetic fraction recovered for use as a source of iron ore. ... Magnetic separation studies have been extensively carried out and …
MAGNETIC SEPARATION FOR ENVIRONMENTAL …
Magnetic separation is a physical separation process that segregates materials in a mixture on the ... storage tank waste treatment and chemical processing residue concentration. The magnetic roll separator is used to separate dry powder mixtures and is most effective on particles ranging from 90 to 850 microns in
Study on the Grinding Kinetics and Magnetic Separation of …
In recent years, a low-grade vanadiferous titanomagnetite concentrate (LVTC) produced in the northwest area of Liaoning has attracted more and more attention. However, it is difficult to recover and utilize valuable minerals such as iron, titanium, and vanadium, due to their special physical and chemical properties and complex mineral …
Magnetic roasting of pressure leaching residue of …
The subsequent magnetic separation was performed by using a magnetic field intensity of 111 kA · m−1 and a grinding fineness less than 45 μm of 96. 19% for the sintered product. View Show abstract
MAGNETIC SEPARATION FOR ENVIRONMENTAL …
We are currently developing the magnetic roll or drum-type separator and the high gradient magnetic separator (HGMS) for applications to soil decontamination, liquid waste treatment, underground storage tank waste treatment and chemical processing residue …
Magnetic separation of serpentinite mining …
The optimum conditions of magnetic separation were obtained with multiple pass approaches; at 40% initial pulp density and 7.5 x 10- 3 tesla (T) magnetic intensity with a mean particle size of 75 μm.
Comparative Study of Hydrogen Reduction of Bauxite Residue …
To minimize the carbon footprint in the industrial valourization of bauxite residue, hydrogen was used as a reducing agent. The current study experimentally investigated hydrogen reduction of bauxite residue-CaO sintered and self-hardened pellets at 1000 °C, along with magnetic separation of these reduced pellets for iron recovery. …
Deep Insight on the Occurrence Feature of Iron Minerals …
magnetic separation and pulsating high-gradient magnetic separation were, respectively, proposed to recover magnetite and limonite from the residue, and under the optimized conditions, a high-grade
Magnetic Solid Phase Extraction as a Promising Technique …
The aim of this article is to bring a review of recent works where magnetic solid-phase extraction (MSPE) procedures in connection with spectrometric methods …
Fabrication of a magnetic metal-organic …
The resulting eluent was then mixed and evaporated to dryness while being gently streamed with nitrogen. The residue was re-dissolved in 1mL of initial mobile phase and filtered through 0.22μm membrane to inject into the HPLC-Q-Orbitrap S system for analysis. ... (right) after magnetic separation; The TGA curves (e), N 2 adsorption and ...
Minerals | Free Full-Text | Deep Insight on the Occurrence
The rest are adjacent and wrapped intergrowths. Low-intensity magnetic separation and pulsating high-gradient magnetic separation were, respectively, proposed to recover magnetite and limonite from the residue, and under the optimized conditions, a high-grade magnetite concentrate assaying 64.05% Fe with 85.59% magnetite recovery …
Quantitative detection of chloramphenicol residue in fish …
Magnetic separation is an effective and fast enrichment method that can improve the efficiency of SERS detection [25]. Thus, the noble metal-coated magnetic nanoparticles (MNPs) display magnetic separation and signal enhancement features. In addition to protecting the core, the noble metal enclosure also increases stability and …
Magnetic separation for recovering iron resources from …
The experimental procedure of the process is shown in Fig. 2.The system consists of a quartz tube, a laboratory-scale tube furnace, a gas supply system, a bar mill, and a magnetic tube [22], [23].First, 30 g of acid-leaching tailings of laterite nickel ore was weighed into a quartz tube and noble gas (N 2) was introduced to exhaust the air from …
Comprehensive Recovery of Iron and Aluminum from …
type wet magnetic separator. The intensity of the magnetic current was set to 4 A, while the magnetic field strength was 1.28 T. The final products of the magnetic separation included magnetic iron con-centrate, nonmagnetic residues bearing NaAlO 2 and the filtrate. The iron concentrate was analyzed and the iron recovery and content of …
Magnetic separation for recovering iron resources from acid …
Magnetic separation for recovering iron resources from acid-leaching tailings of laterite nickel ore through mineral phase transformation - ScienceDirect. Separation and …
Hydrogen reduction of bauxite residue and selective
After magnetic separation, a 95% iron recovery was obtained. This study revealed that additives such as Na 2 CO 3, ... Interestingly, the resulting non-magnetic residue is expected to be Fe, Al and Na depleted, but Ca, Si, Ti and REEs-enriched. Thus, depending on the exact chemistry, it could be used for downstream metal extraction or …
Simultaneous Determination of Trace Matrine and …
We developed a magnetic solid-phase extraction method using Fe 3 O 4 @polydopamine (Fe 3 O 4 @PDA) as adsorbents, coupled with liquid chromatography-tandem mass spectrometry (LC–MS/MS), for the enrichment and quantification of trace matrine and oxymatrine pesticide residues in tea. The adsorbent was easily …
Controlled reduction of red mud by H2 followed by magnetic separation
The reduction and separation of iron oxide phases from red mud was investigated. The residue was reduced by hydrogen at gentle and controlled heating conditions (temperature range between 300 and 480 °C) aiming for the formation of magnetite which can be collected through wet magnetic separation due to its high …
Zero-Waste Recycling Method for Nickel Leaching Residue …
In this paper, a novel process for beneficiation of metallic iron from nickel leaching residue and preparation of ceramsite from tailings by direct reduction–magnetic separation process is reported.
A detoxification and value-added process for chromium
The Pb and Zn were reduced and volatilized into the flue gas. The Cr-containing iron powder obtained by magnetic separation could replace part of ferrochrome alloy during the stainless steel refining process. The non-magnetic tailings were determined as nontoxic residues and could be used in the field of building material.
Recovery of iron from bauxite residue using advanced separation …
Advanced separation techniques used for recovery of iron from bauxite residue. Coal dust, most effective reducer amongst sugar cane bagsse, spent spot lining. Reduction roasting is not a good alternative. Best option is Hydrocyclone & magnetic separation with 70% Fe and 80% recovery. Abstract.
Sustainable processing of gold cyanide tailings
After filtration, the leach residue of gold extraction (200 g) was slowly added to the magnetic separator to maintain the suitable magnetic field intensity. When the material passed through the magnetic field, the magnetic material was attracted, while the non-magnetic material exited from the discharge. ... In the stage of magnetic …
Quantitative detection of chloramphenicol residue in fish …
Consequently, Ag@Au CSNPs are ideal for further biometric binding and signal enhancement [24]. Magnetic separation is an effective and fast enrichment method that can improve the efficiency of SERS detection [25]. Thus, the noble metal-coated magnetic nanoparticles (MNPs) display magnetic separation and signal enhancement …
(PDF) Iron Recovery from Bauxite Residue Through
The magnetic iron phases in the roasting residue can be fractionated in a second stage through wet magnetic separation, forming a valuable iron concentrate and leaving a nonmagnetic residue ...