Iron Recovery from Red Mud Using Carbothermic Roasting with …
Red mud is a hazardous waste of alumina production by the Bayer method, which can be used for recovery of valuable elements such as iron, aluminum, titanium, and scandium. In this study, carbothermic roasting of red mud followed by dry or wet magnetic separation was applied with addition of alkaline salts to enhance iron extraction. A …
Iron Extraction from Red Mud using Roasting with Sodium Salt
The effect of sodium sulfate on the red mud separation roasting-magnetic separation process was studied. The results show that at the roasting temperature of 1100°C for 65 min, the segregation ...
Effect of Na2SO4 on the Embedding Direct …
Chemistry. Titanium. Article. Effect of Na2SO4 on the Embedding Direct Reduction of Beach Titanomagnetite and the Separation of Titanium and Iron by …
Influence of Sodium Sulfate Addition on Iron Grain …
In addition, it is notable that sulfur, which is harmful impurity for steelmaking, generates iron-free compounds, so it can be favorable to obtain a good …
Reductive roasting of nickel laterite ore with sodium sulfate …
ABSTRACT The selective reduction of nickel and adequate growth of ferronickel grains are imperative for efficient preparation of ferronickel from nickeliferous laterite ore via the process of direct reduction followed by magnetic separation. In Part I, reduction/sulfidation behaviors of a saprolitic laterite ore in the presence of sodium …
Biotin exposure-based immunomagnetic separation coupled with sodium
In this study, we established a rapid and sensitive method for the detection of viable Salmonella Typhimurium, Staphylococcus aureus, and Listeria monocytogenes in milk using biotin-exposure-based immunomagnetic separation (IMS) combined with sodium dodecyl sulfate (SDS), propidium monoazide (PMA), and multiplex real-time PCR (mRT-PCR).
Magnetic particles for the separation and …
Particles with a diameter larger than 1 μm can be separated easily using simple magnetic separators, while separation of smaller particles (magnetic colloids …
The effect of sodium sulphate on the hydrogen reduction …
A series of nickel laterite ores with different calculated amounts of anhydrous sodium sulphate were prepared by physical blending or sodium sulphate solution impregnation. The reduction of the prepared nickel laterite ore by H 2 was carried out in a fluidised-bed reactor with provisions for temperature and agitation control, and the …
Effects of sodium salts on reduction roasting and Fe–P separation …
The reduction and Fe–P separation get better in the presence of sodium sulfate, the iron metallization of reduced pellet goes up to 92.3%, the total iron grade of magnetic material and iron recovery of magnetic separation is 90.7% and 89.4% respectively, the phosphorus content of magnetic material is 0.15% and the …
Separation of cobalt, lithium and nickel from the
The commonly reported procedure includes crushing and physical magnetic separation. Paper and plastic particles have been separated using appropriate sieves. The BM of lithium batteries can be used as a secondary source of cobalt, lithium and nickel. ... Sodium sulfate, Na 2 SO 4, Chempur, CAS : 142.04: 99.0: Sodium …
Stable salt hydrate-based thermal energy storage materials
A polyelectrolyte, dextran sulfate sodium (DSS) salt was used as an additive to reduce phase separation by encapsulating small SS particles. These suspended SS particles enclosed inside of the DS polyanions, due to strong electrostatic interactions, significantly reduce the precipitation/settling rate of SS particles during melting.
Sodium-Salt-Assisted Reductive Roasting for Separation …
The dual effect of sodium-salt-assisted reductive roasting for iron recovery and chromium enrichment from lateritic iron ore was investigated. Iron oxides were reduced to metallic iron through reductive roasting, while Al- and Si-bearing components were transformed to sodium aluminosilicate and/or diaoyudaoite. Thus, direct reduced iron …
Biotin exposure–based immunomagnetic separation coupled with sodium
In this study, we established a rapid and sensitive method for the detection of viable Salmonella Typhimurium, Staphylococcus aureus, and Listeria monocytogenes in milk using biotin-exposure-based immunomagnetic separation (IMS) combined with sodium dodecyl sulfate (SDS), propidium monoazide (PMA), and multiplex real-time …
Enrichment of Rare Earth and Niobium from a REE-Nb-Fe
The process of reductive roasting followed by magnetic separation was adopted in this article, and sodium sulfate was employed to enhance reductive roasting and magnetic separation. It is aimed to enrich rare earth and niobium in the nonmagnetic fraction and prepare metallic iron in the magnetic fraction for steel making.
Beneficiation of nickeliferous laterite by reduction roasting in …
Compared with those reduced without sodium sulfate, the Ni grade of ferronickel concentrate increased from 2.33% to 9.48%, and the magnetic separation recovery of Ni increased from 56.97% to 83.01 ...
Reduction roasting–magnetic separation of …
The results show that after reduction roasting–magnetic separation with sodium sul-fate dosage of 2 wt% at roasting temperature of 1150 C for roasting time of 120 min, metallic …
Mechanism of sodium sulfate in promoting selective …
Na 2 O improves nickel recovery, whereas S and Na 2 S are beneficial for nickel enrichment through magnetic separation because of the formation of FeS. Thus, …
Efficient Synchronous Extraction of Nickel, Copper, …
The results revealed that the mechanism of the sulfating roasting pretreatment could form a liquidus eutectic compound sulfates [Na 2 Me (SO 4) 2] (Me = Ni, Cu, Co) at the solid–solid...
(PDF) Effect of Sodium Sulfate on Preparation of Ferronickel …
However, with addition of 8.0 mass% sodium sulfate, the grade of Ni in magnetic material and the recovery of Ni reached up to 9.7 mass% and 89.1%, respectively. ... After magnetic separation, the ...
Recovery of Titania Slag and Iron from Semi-molten State
In the present study, grinding and wet magnetic separation of the products from semi-molten state reduction of Panzhihua ilmenite concentrate was investigated. The separation aimed at producing a titania-rich slag and a metal phase containing most of iron. ... The addition of sodium carbonate and sodium sulfate effectively improves the ...
Mixed hemimicelles solid-phase extraction based on sodium …
In this study, mixed hemimicelles solid-phase extraction (MHSPE) based on sodium dodecyl sulfate (SDS) coated nano-magnets Fe 3 O 4 was investigated as a novel method for the extraction and separation of four banned cationic dyes, Auramine O, Rhodamine B, Basic orange 21 and Basic orange 22, in condiments prior to HPLC …
Alumina Extraction from Red Mud by Magnetic Separation
Alumina extraction from red mud has been investigate d by magnetic separation with three-step treatment. First, the addition of red mud wit h Na CO3 (12 wt%) and heated at 11 0 °C for 4 h. The ...
Effect of Na2SO4 on the Embedding Direct Reduction of …
The carburization roasting treatment followed by the magnetic separation is an effective way to utilize low-grade siderite, in which the sodium sulfate additive plays an important role.
Magnetic particles for the separation and purification of …
Magnetic separation of nucleic acids has several advantages compared to other techniques used for the same purpose. Nucleic acids can be isolated directly from crude sample materials such as blood, tissue homogenates, cultivation media, water, etc. ... The use of sodium perchlorate in deproteinization during the preparation of nucleic acids ...
(PDF) Reduction roasting–magnetic separation of …
The results show that after reduction roasting–magnetic separation with sodium sulfate dosage of 2 wt% at roasting temperature of 1150 °C for roasting time of 120 min, metallic iron...
Reduction Behavior of Garnierite Using Methane by Roasting-Magnetic …
The nonmagnetic FeS generated in the process reported to the tailings during the magnetic separation process, resulting in the reduced iron content and recovery . In addition, sodium sulfate reacts with forsterite from lizardite decomposition and generates more complex crystalline phases which decrease the content and recovery of …
Studies on Reduction Characteristics of Limonite and Effect of Sodium
The selective reduction process is the process to separate nickel and iron on limonite with the combination of magnetic separation. This process uses sodium sulphate as the additive and graphite as the reductant. The stoichiometry of reductant and the concentration of additive are the key for this process on the selective reduction to the …
Reductive roasting of nickel laterite ore with sodium sulphate …
ABSTRACT In Part II, the correlation between Fe–Ni grain growth and characteristic fusion temperatures of the Na2SO4–laterite mixtures, and phase transformations of the reduced pellets were investigated. For the mechanism of sodium sulphate, Na+ is able to liberate the hosted nickel and iron within lizardite, while SO42– …
Reductive roasting of nickel laterite ore with sodium sulfate …
Reductive roasting of nickel laterite ore with sodium sulfate for Fe-Ni production. Part I: Reduction/sulfidation characteristics. Mingjun Rao School of Minerals Processing and Bioengineering, ... efficient preparation of ferronickel from nickeliferous laterite ore via the process of direct reduction followed by magnetic …
Effect of Sodium Sulfate on Preparation of Ferronickel …
selective reduction with addition of sodium sulfate (10.0 mass%) at 1 200°C for 50 min. A ferronickel concentrate with Ni grade of 9.9 mass% and nickel recovery of 90.9% was obtained after wet magnetic separation. Lu 14) et al. studied the effect of sodium sulfate on the hydrogen reduc-tion process of nickel laterite ore. The maximum nickel