It has been demonstrated that the addition of sodium sulphate during the reductive roasting of laterite ore can enhance the subsequent grinding-magnetic separation efficiencies, the grade of ...

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.

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 ...

Fused sodium sulfate utilized for electrochemical polarization of the platinum electrode further recovered dysprosium and neodymium metals: Fukumoto et al. (2012) ... The present review article on solvent extraction of dysprosium and neodymium and their possible separation from permanent magnet scrap outlines various advances made in …

Abstract Red mud has become one kind of the most hazardous solid waste. In order to recover iron from red mud, the technology of sodium salt roasting and magnetic separation was developed. During the reduction roasting, additives (Na2SO4 and CaO) reacted with SiO2 and Al2O3 of red mud, forming NaO⋅Al2O3⋅2SiO2, 2CaO⋅Al2O3⋅SiO2, …

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...

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 ...

Chemistry. Titanium. Article. Effect of Na2SO4 on the Embedding Direct Reduction of Beach Titanomagnetite and the Separation of Titanium and Iron by …

Highlights Using reduction roasting–water leaching–magnetic separation method, the recovery of iron from cyanide tailings was optimized. The recovery of iron was highly depended on the water-leaching process after reduction roasting. The results suggest that the method can be effectively used for iron recovery, and the grade of magnetic …

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 …

The inconsistent changes between Fe metallization ratio and its recovery as sodium sulfate dosage varies from 0% to 5%, shows that the magnetic separation of ferronickel from gangue is more effective in the presence of sodium sulfate. The different magnetic separation efficiency of reduced laterite pellets in the absence or presence 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 ...

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 …

Particles with a diameter larger than 1 μm can be separated easily using simple magnetic separators, while separation of smaller particles (magnetic colloids …

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 …

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 ...

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 …

The increased iron recovery and TFe in the concentrate after magnetic separation was mainly attributed to the formation of magnetite Fe3O4 on the surface of iron-bearing minerals during surface magnetization. ... The addition of sodium sulfate and calcium oxide during reductive roasting increased the iron recovery efficiency up to …

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 …

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.

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).

An innovative technology for direct reduction-magnetic separation with the addition of Na 2 CO 3 and CaO was studied to upgrade copper slag assaying 40.33% Fe total and 0.65% Cu. It is difficult to recover iron and copper from the slag by direct reduction since the iron mainly occurs in fayalite and the copper exists in copper sulfide.

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 …

The another view hold that sodium sulfate can form eutectic compound sulfate (Na 2 Me(SO 4) 2) react with the preformed metal sulfate (such as nickel sulfate, copper sulfate, and cobalt sulfate ...

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 sulfate addition caused the formation of FeS, which was closely related to metallic iron grains that were difficult to completely remove by magnetic separation. The residual FeS in the DRI was oxidized to Fe–S–O-bearing material during the process of mineral processing and was still closely associated with the metallic iron.

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...

To increase the efficiency of magnetic separation, a large particle size of ferronickel is desired. Therefore, in this study, the influences of CaO, CaF2, and H3BO3 additives on the evolution of ferronickel particle at ≤1250°C were investigated. ... J. Kou, N. Liu, and S.Y. Zhang, Mechanism of sodium sulfate in promoting selective reduction ...

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 concentrate ...

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 ...