In this study, selective magnetic coating-magnetic separation was employed to separate the pentlandite from serpentine with adding NaOL as a …

In other words, the main challenge issue in nickel ore dressing is to realize the separation of pentlandite and serpentine. The separation of pentlandite from serpentine is typically achieved by froth flotation, ... (NaOL) in the magnetic separation of pentlandite from serpentine using magnetic coating. Powder Technol., 345 (2019), pp. 492-500.

As a result, pentlandite particles were coated by magnetite fines and surface magnetism of pentlandite was enhanced to enable its separation from serpentine by …

The serpentinization may initiate at an oceanic spreading ridge center under high temperatures (>250–300°C) to produce magnetite and subsequently continue at …

The effects of magnetite as the magnetic seed on magnetic coating behavior in pentlandite and serpentine system were investigated through magnetic separation tests, X-ray diffraction analysis, zeta potential measurements, and calculations of DLVO (Derjaguin–Landau–Verwey–Overbeek) theory. The results show that, the …

Serpentine is a versatile mineral family rich in Mg silicate with several polymorphic phases, mainly antigorite and lizardite, all of them with similar chemical composition (Mg3Si2O5 (OH)4). Their ...

In this study, pentlandite was selectively separated from serpentine using magnetic coating technology by adjusting and optimizing pH, stirring speeds, magnetic field intensities, and dosages of sodium hexametaphosphate (SHMP) and sodium oleate (SO). A magnetic concentrate with Ni grade of 20.8% and Ni recovery of 80.5% was attained …

Experiments revealed that chromite could be separated from serpentine with a 96.8% recovery under the experimental conditions of 4 x 10 −4 M DDA, 25 mg magnetite, and …

In this study, possible separation of chromite from serpentine in fine sizes using a magnetic carrier was investigated as a function of pH, dodecylamine (DDA) dosage, and amount of magnetite. First, the zeta potentials of minerals were determined in the absence and presence of DDA, and then magnetic carrier experiments were performed in ...

The separation of magnesite fines from serpentine fines by magnetic carrier methods has been examined in this study. The zeta-potential of serpentine, magnesite and magnetite was measured with and without dodecylamine as surfactant. The interaction energies between the particles were then calculated. Without the surfactant, …

Another geometry for inertial cell/particle separation is serpentine channels; for instance, Zhang et al. (Zhang et al., 2014) proposed a serpentine-shape biochip to separate red blood cells (RBCs) and white blood cells (WBCs) from plasma. ... The magnetic-based cell separation approach refers to a non-invasive method for …

Magnetic separation was performed using a modified Jones Wet high intensity magnetic separator (WHIMS). A background field intensity of 15,000 to 20,000 gauss could be achieved with this type of separators. ... The QEMSCAN (Table 1) shows that ore S is composed of serpentine, goethite, siderite, spinel, quartz, olivine and clays …

Abstract: Serpentine, a magnesium silicate mineral with positive surface charge in many sulfide. ores around the world, usually deteriorates the fl otation behavior by covering the target mineral ...

Reduction roasting–magnetic separation technology has been extensively applied to the extraction of nickel from laterite nickel ores with low nickel content due to its short process flow, ... The addition of CaO could effectively destroy the serpentine structure, promote the reduction of iron and nickel oxides, and release iron and nickel in ...

Magnetic coating magnetic separation method was proposed to separate pentlandite from serpentine, which is difficult to separate them using flotation. Results show that under …

Magnetic separation has also been recommended as a pre-treatment to enhance the effectiveness of serpentine carbonation because removal of magnetite mitigates the passivating effect of Fe-oxide precipitation on grain surfaces (Huijgen and Comans, 2003; Veetil et al., 2015).

In laboratory studies, nickel pyrite was separated from serpentine by magnetic separation after encapsulating the target mineral with fine magnetic particles [13][14] [15] [16][17]. These studies ...

Serpentine and pentlandite were mixed by 2:1 (mass ratio, the total mass was 15 g) and separated under an addition of 3% magnetite and a magnetic field intensity of 200 kA·m − 1 using magnetic separation.

Abstract. The efficient separation of pentlandite from serpentine remains a challenging issue in the processing of nickel sulfide ores. In this study, selective …

In laboratory studies, nickel pyrite was separated from serpentine by magnetic separation after encapsulating the target mineral with fine magnetic particles [13,14,15,16,17]. These studies were only conducted in the laboratory stage, and there are many other factors that need to be considered in magnetic package sorting technology …

The schematic of our proposed hybrid device including an asymmetric serpentine inertial channel, an inertial focusing channel, and a magnetic cell separation device for CTC separation from whole blood is shown in Figure 1 a. As it is shown, this device has one inlet for sample injection into the device and four outlets for collecting the outlet ...

The results of studies of magnetic separation in a weak field of various enrichment products have shown that the greatest efficiency of separation of magnetite from accretions with rock is achieved at a lower magnetic field strength, in the range of 15.9–23.9 kA/m . When the magnetic field strength decreases from 79.6 to 15.9 kA/m, the mass ...

An excellent separation of chalcopyrite and serpentine was achieved using GM as the depressant with a lower dosage of 40 mg/L, for which the flotation recovery of chalcopyrite was more than 80% ...

Active micromixers need external energy sources, such as acoustic, electrokinetic, pressure, magnetic, ... For the sinusoidal serpentine micromixer (base), separation vortices are eliminated at a turn with the curvature. These vortices promote chaotic advection but tend to induce a significant pressure drop. Micromixer Type1 has a …

In laboratory studies, nickel pyrite was separated from serpentine by magnetic separation after encapsulating the target mineral with fine magnetic particles [13][14][15][16] [17]. These studies ...

This study presents an efficient isolation of human lung carcinoma cell line (A549) platform by utilizing the proposal a serpentine microchannel with added cavities (SMAC) platform. The magnetic micro-bead isolation performance in proposed serpentine channel was simulated using COMSOL Multiphysics. The experimental procedures of aptamer …

Thus, the magnetism of pentlandite was enhanced and pentlandite was well separated from serpentine by magnetic separation under the magnetic field intensity of 200 kA/m. Scanning electron microscopy (SEM) and zeta potential measurement were performed to characterize changes of mineral surface properties. Calculations of the …

The second-stage serpentine inertial focuser aligns the larger cells, of which the magnetically labeled WBCs are then removed in the third-stage magnetic sorter. ... /h after a single round of separation. In a later work, Adams et al. demonstrated the integration of acoustic and magnetic separation into a monolithic device (Figure 12B). …

The serpentine microfluidic design provides a compatible solution for high-throughput separation, which can synergize with other functional designs to improve device performance. Further, its advantages such as low cost, high biocompatibility, label-free separation and ability to integrate with on-chip biosensors are promising for clinical ...