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. The optimal conditions for direct reduction process were 1100 °C roasting temperature, 120 min duration, and 30 wt.% reductant dosage. The …

Particle separation in a microchannel by applying magnetic fields …

Three models (including magnet arrangements and Nickel layer) are presented to increase the separation efficiency by optimizing the magnetic field. Polystyrene particles with the diameter of 0.2–7 μm and EMG 408 as the ferrofluid have been used in the proposed model.

Efficient Synchronous Extraction of Nickel, Copper, …

Separation and recovery of iron and nickel from low‒grade laterite nickel ore using reduction roasting at rotary kiln followed by …

Enhanced ammonia-rich solution production and electrode separation …

Nickel-loaded carbon black (Ni 0-CB) particles showed magnetization response.. The solid–liquid separation via a magnet enabled the recycling of Ni-CBs. • Ni-CB has a weak adsorption capacity to NH 3, beneficial to the ammonia recovery. Ammonia recovery efficiency of Ni-CBs was increased by ~20 % compared with AC.

STUDY ON SELECTIVE REDUCTION AND MAGNETIC …

then upgraded by magnetic separation, 75 per cent of the total mass being rejected as tailings, and a high grade nickel concentrate, assaying 5.1 per cent Ni and 82.66 per cent Fe total

Effects of CaO Addition on the Iron Recycling from Nickel …

Because magnetite and magnesium ferrite were the dominant iron-containing phases in the oxidized nickel slag, magnetic separation was performed to separate these magnetic minerals. As presented in Figure 7, the recovery rate and yield of iron were first increased and later decreased as the CaO increased, while the iron content remained …

Magnetic separation for recovering iron resources from …

The grinding-magnetic separation results of reduced briquettes show that concentrate containing 3.25 % Ni, 1.20 % Cu and 75.26 % Fe is obtained and selective enrichment is achieved with a recovery of 82.20 %, 80.00 % for nickel and copper respectively, while the recovery of iron is only 42.17 %.

Research on magnetic separation for complex nickel deep …

This study investigated the deep removal of complex nickel from simulated wastewater using magnetic separation and magnetic seed recycling. Nano-magnetite (Fe3O4) was used as the magnetic seed.

Selective cobalt and nickel electrodeposition for lithium-ion

Also, there have been extensive studies at a laboratory scale for the separation of cobalt and nickel, such as solvent extraction 12,13, precipitation 14, adsorption 15,16,17,18,19,20,21 ...

Awaruite, a new large nickel resource. Part 2: Assessment of magnetic …

In this work, a research study, focused on the recovery of awaruite, was conducted on a representative sample from the Baptiste deposit to evaluate magnetic separation over a range of magnetic field strengths. The Baptiste deposit is a unique nickel deposit containing awaruite, a high-density ferromagnetic nickel-iron alloy. The evaluation …

Separation and recovery of iron and nickel from low-grade …

The magnetic separation efficiency of nickel from the laterite ore was evaluated using the recovery ratio of nickel R ni using the formula: (1) R Ni = m Ni × β Ni M Ni × γ Ni × 100 % where m Ni is the mass of the magnetic product, g; β Ni is the nickel content in the magnetic product, wt.%; M Ni is the mass of the reduction product, g ...

Research on magnetic separation for complex nickel deep …

In this study, a magnetic separation technique was applied to remove complex nickel from wastewater using magnetic flocculation. The magnetic separation experiment resulted in a residual Ni concentration of less than 0.1 mg/L compared to the initial concentration of 50 mg/L. See more

The Aggregation and Growth of Ferronickel Particles During …

The main source of nickel has gradually become the recovery of ferronickel concentrate from low-grade laterite nickel ore. In this work, high-grade ferronickel concentrate was prepared by a reduction roasting-magnetic separation process, and low-grade ferronickel concentrate and CaF 2 were used as composite additives to promote …

Development of Special Magnetic Separator to Recover

A novel special magnetic separator was developed based on the special properties of precious metal-bearing alloy in high-grade nickel matte. The recovery of Au, Pt, and Pd was 77.79%, 84.79%, and 81.79% respectively at optimum operation conditions of magnetic separator feed of 2.5t/h, pulp density of 45%, and flush water of 1.5t/h, and …

Study on selective reduction and magnetic separation of …

The reduced ore was then upgraded by magnetic separation, 75 per cent of the total mass being rejected as tailings, and a high grade nickel concentrate, assaying 5.1 per cent Ni and 82.66 per cent ...

Preparation of high-grade ferronickel from low-grade nickel …

The separation of nickel and iron and the efficient recovery of nickel in the ore were both realised in this study. ... Utilization of limonitic nickel laterite to produce ferronickel concentrate by the selective reduction-magnetic separation process. Adv. Powder Technol., 30 (2019), pp. 451-460. View PDF View article View in Scopus Google ...

Magnetic separation of nickel-plating waste liquid using a …

In this study, the magnetic separation experiment for recovering Ni-plating waste was conducted using a bulk magnet activated by pulsed field magnetization. A …

Ferronickel enrichment by fine particle reduction and magnetic

After magnetic separation, the maximum total nickel and iron concentrations are 5.43wt% and 56.86wt%, and the corresponding recovery rates are 84.38% and 53.76%, respectively. Article PDF. Download to read the full article text Similar content being viewed by others. Experimental Study on Reduction-Magnetic Separation Process of Low …

Magnetic separation for recovering iron resources from acid …

In this research, efficient iron enrichment was innovatively proposed through "mineral phase transformation - magnetic separation" for the acid-leaching tailings of …

Efficient enrichment of nickel and iron in laterite nickel ore …

The process of deep reduction and magnetic separation was proposed to enrich nickel and iron from laterite nickel ores. Results show that nickel–iron concentrates with nickel grade of 6.96%, nickel recovery of 94.06%, iron grade of 34.74%, and iron recovery of 80.44% could be obtained after magnetic separation under the conditions of …

Recovery of metals from Cuban nickel tailings by

The objective of the magnetic separation was to increase the iron content in the secondary tailings for use as a raw material in the steel industries. The X-ray patterns show the tailings contain magnetite, fayalite and quartz. ... and heating of organic salts at 200 °C can lead to a concentration of nickel and cobalt. In addition, the ...

Efficient Synchronous Extraction of Nickel, Copper, and …

Separation and recovery of iron and nickel from low‒grade laterite nickel ore using reduction roasting at rotary kiln followed by magnetic separation technique. Mining, Metallurgy & Exploration ...

Selective cobalt and nickel electrodeposition for lithium-ion …

Also, there have been extensive studies at a laboratory scale for the separation of cobalt and nickel, such as solvent extraction 12,13, precipitation 14, …

Magnetic roasting of pressure leaching residue of nickel …

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

Beneficiation of Low-Grade Laterite Nickel by …

1000 to 8000 Gauss. In some of the tests, before magnetic separation, the first sample was calcined in a muffle furnace model AWF 12/25 made in Lenton England in temperatures between 350 and 900°C during 60 min followed by magnetic separation. At the end of each test, magnetic and non-magnetic sections were analyzed

(PDF) Preparing Ferro-Nickel Alloy from Low-Grade Laterite Nickel …

from magnetic separation and the nickel recovery to decline. Therefore, the appropriate reduction time. could be 2 h. Metals 2017, 7, 313 8 of 14. Metals 2017, 7, 313 8 of 14 . Figure 8.

Extraction of ferronickel concentrate from laterite nickel ore …

Nevertheless, when reduction roasting–magnetic separation is used to treat laterite nickel ore with low nickel content, increasing the dosage by approximately 8–20% inevitably reduces equipment life and increases cost (Liu et al.,2021). Therefore, improving the grades and recoveries of iron and nickel is of major significance.

Carbothermic Reduction of Nickeliferous Laterite Ores for Nickel …

Both the consumption and production of crude stainless steel in China rank first in the world. In 2011, the nickel production in China amounted to 446 kilotons, with the proportion of electrolytic nickel and nickel pig iron (NPI) registering 41.5% and 56.5%, respectively. NPI is a low-cost feedstock for stainless steel production when used as a …

Awaruite, a new large nickel resource. Part 2: Assessment of magnetic …

Semi-batch pilot scale magnetic separation was performed using wet magnetic drums with different magnetic field strengths. The nickel recovery increased with increasing magnetic field strength for both SC and SF samples (Fig. 1.a, circuits #1). For sample SC, the cumulative nickel recovery ranged from 49.8 % at 1500 G and 65.9 % at …

Preparation of ferronickel from nickel laterite via coal-based

The sticking phenomenon between molten slag and refractory is one of the crucial problems when preparing ferronickel from laterite ore using rotary hearth furnace or rotary kiln processes. This study aims to ameliorate sticking problems by using silicon dioxide (SiO2) to adjust the melting degree of the briquette during reduction roasting. …

Upgrading low nickel content laterite ores using selective …

Selective reduction and magnetic separation of laterite ore. According to previous research, nickeliferous concentrates with nickel content of 5.1% and a nickel recovery of 98.8% could be produced from LN laterite ore by selective reduction and magnetic separation process when the reduction was conducted at 1250 °C for 60 min …

Magnetic separation of iron precipitate from nickel sulfate …

Efficient magnetic separation offseted the poor settleability and filterability of the precipitate. After magnetic separation of iron residue, the nickel solution was qualified and the dried iron residue contained more than 52% Fe and less than 0.6% Ni, indicating a promising alternative process for treatment of bulky residues of iron precipitate.

High-Grade Ferronickel Concentrates Prepared from Laterite …

Considering on the low grade of nickel and iron in laterite nickel ore, solid-state reduction roasting combined with magnetic separation to remove the magnesium …

Magnetic separation for mining industry – Magnetense

This type of magnetic separation machine is used in wet separation processes for smaller than 1,2 mm ( – 200 mesh of 30-100 %) of fine grained red mine (hematite) limonite, manganese ore, ilmenite and some kinds of weakly magnetic minerals like quartz, feldspar, nepheline ore and kaolin in order to remove impurity iron and to purify them.

Nickel recovery from electric arc furnace slag by magnetic separation

Effect of magnetic field intensity the magnetic field of a hand magnet, systematically provides a magnetic product Magnetic separation tests were carried with nickel grade higher than 1.10% for out using either hand-magnet (low-intensity particle size +2.80 mm.

Magnetic Separation

Magnetic separation is a process where a contaminant is first attached onto a magnetic carrier material (e.g., magnetite), and subsequently, the contaminant-laden carrier is separated under a magnetic field. The simplest magnetic separator is a permanent magnet. ... a second magnetic separation of the nickel-containing parts of the …

Research on magnetic separation for complex nickel deep …

This study investigated the deep removal of complex nickel from simulated wastewater using magnetic separation and magnetic seed recycling. Nano-magnetite (Fe3O4) was used as the magnetic seed. The flocculant applied was N,N-bis-(dithiocarboxy) ethanediamine (EDTC), a highly efficient heavy metal chelating agent …