Beneficiation of South African Chromite Tailings using Magnetic Separation
There are proven and well established widely accepted techniques for concentration of chromite ores such as spiral concentration, jigs and shaking tables. However, these techniques become inefficient and complex when treating fine and ultrafine size particles (less than 75μm) resulting in this size fraction lost to the tailings. As a …
Modeling and optimization of spiral concentrator for separation …
The separation of chromite ore with lowest particle size fraction was done using Mozley mineral separator followed by the magnetic separation of the sink product by magnetic separator.
Top 3 Chrome Ore Processing Methods that Get Higher …
Chrome ore flotation Generally, when the gravity separation and magnetic separation fail, flotation offers an alternative technique to concentrate the fine-grained and ultra-fine-grained chromite rocks and fine-grained chromite tailings which require fine grinding for liberation. But grinding will produce a large amount of ore slime.
Efficient immobilization and utilization of chromite ore …
Chromium exists in the nature chromite ore, which is a magnetic composite spinel phase containing FeCr 2 O 4 and Fe 3 O 4 (Arai et al., 2020; ... Before the magnetic separation process, the samples were screened through a 200-mesh sieve (0.074 mm). After the separation, the total Cr and Fe concentrations in the supernatants were …
Processing of Ferruginous Chromite Ore by Dry High-Intensity Magnetic …
ABSTRACT Mineral and morphological characteristics of chromite ore strongly affect the separation efficiency while upgrading the low-grade deposits. Usually, chromite ore enrichment is carried out by using gravity separation due to high-concentration criterion between chromite and other minerals. However, chromite ore …
Magnetic separation studies on ferruginous chromite fine …
The Cr:Fe ratio (chromium-to-iron mass ratio) of chromite affects the production of chrome-based ferroalloys. Although the literature contains numerous reports related to the magnetic separation of different minerals, limited work concerning the application of magnetic separation to fine chromite from the Sukinda region of India to enhance its …
A discussion of magnetic separation techniques for …
wet gravity concentration alone. In other chromite beneficiation processes, magnetic separation by RED is an essential polishing step. Figure 3 shows a typical flowsheet for …
Beneficiation of South African chromite tailings using …
The chromite is associated with magnesium and as a result, it is expected that separation of chromite by magnetic separation will be easier and will occur at a higher magnetic strength as compared to the ferruginous ores [8]. Further studies need to target recovery …
Chrome ore beneficiation challenges & opportunities – A …
Magnetic separation studies carried out by Abubakre et al. (2007) on Ankha chromite ore shows that the Cr 2 O 3 content has increased to 48% from ... I., Birlik, M., …
Separation of Chromite from Serpentine in Fine Sizes using Magnetic …
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 …
Processing of Ferruginous Chromite Ore by Dry High …
To address this, dry magnetic separation is an alternative approach to separate these iron-bearing gangue minerals from the chromite. This work investigated …
Separation of Chromite from Serpentine in Fine Sizes using Magnetic …
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 …
Magnetic separation studies on ferruginous chromite fine to …
The Cr:Fe ratio (chromium-to-iron mass ratio) of chromite affects the production of chrome-based ferroalloys. Although the literature contains numerous …
Beneficiation of South African chromite tailings using …
As a result, a wet magnetic separation technology for recovery of ultra-fine chromite (Cr2O3) from spirals tailings as a scavenger was investigated. The Middle Group …
(PDF) Concentration of chromite by means of magnetic …
The best chromite concentrates containing 42.1% Cr2O3 were obtained with a 76% recovery from a synthetic mixtures of chromite and serpentine under optimum test conditions, that is at pH 10.5, 5.10 ...
Processing of Ferruginous Chromite Ore by Dry High-Intensity Magnetic
To address this, dry magnetic separation is an alternative approach to separate these iron-bearing gangue minerals from the chromite. This work investigated on the application of different dry high-intensity magnetic separators to separate the chromite grains from ferruginous chromite ore deposits of India. Prior to the separation, two ...
CHARACTERIZATION AND BENEFICIATION OF ANKA …
CHROMITE ORE USING MAGNETIC SEPARATION PROCESS O.K. Abubakre 1, R.A. Muriana 2 and P.N. Nwokike 3 Mechanical Engineering Department, Federal University of Technology, Minna
Efficient immobilization and utilization of chromite ore …
Besides, the COPR-HT after magnetic separation contained 11.52 wt% Cr 2 O 3 and 53.44 wt% Fe 2 O 3, which can be used as the raw material for steel industry. ... Chromium exists in the nature chromite ore, which is a magnetic composite spinel phase containing FeCr 2 O 4 and Fe 3 O 4 (Arai et al., 2020; Burkhard, 1993). As the …
Beneficiation of South African chromite tailings using Magnetic Separation
To address this, dry magnetic separation is an alternative approach to separate these iron bearing gangue minerals from the chromite.This work investigated on the application of different dry high ...
The recovery of hematite and chromite fines and ultrafines …
Wet magnetic separation methods for the recovery of hematite and chromite fines and ultrafines were investigated. These methods included wet high-intensity and high-gradient magnetic separation, carrier or "piggy-back" magnetic separation, magnetic field-induced aggregation and magnetic seeding. This investigation indicated …
Chapter 2 Magnetic Separation
Magnetic Separation 2.1 Introduction The differences in magnetic susceptibility can be utilized to separate a valuable mineral from its gangue through the magnetic separation method. Similar to other materials, minerals are generally classified into three main categories, namely diamagnetic, paramagnetic, and ferromagnetic.
Evaluation of Advanced Gravity and Magnetic Concentration …
The feed sample to the magnetic separator was 10% wet, the speed of the drum was set at 15 rpm with a vibration feeder of 8 Hz. After separation of the magnetic material (chromite mineral) with the non-magnetic (mostly silica) for every test, it was then dried in the oven at 80°C, weighed and bagged for XRF analysis.
Improving the Quality of Ferruginous Chromite Concentrates Via Physical
The low chromium-to-iron ratio of chromite ores is an important issue in some chromite deposits. The value of the chromite ore is indeed dictated in the market by its iron, as well as its chromium content. In the present study, a chromite concentrate was reprocessed by gravity (spiral concentrator) and magnetic separation to enhance the …
PRODUCTION OF CHROMITE CONCENTRATE …
In order to recover the ultra fine chromite particles from the Karagedik Concentrator tailings, a new process, including Wet High Intensity Magnetic Separation and column flotation, was developed ...
A study on the recovery of fine chromite from …
Magnetic separation and flotation of fine chromite from UG2 MF2 final tails from PPM mine. Mintek report, confidential, 30 October 2020. Mechanism of collector adsorption in chromite flotation
Reduction roasting and magnetic separation of chromite ore
As reported by Tripathy et al. [4] that the Cr/Fe ratio can be improved from 2.31 to 3.35 by gravity separation process using wet shaking table followed by high-intensity magnetic separation.
Improving Grade of Indian Chromite Ores by High–Gradient Magnetic
To address this, dry magnetic separation is an alternative approach to separate these iron bearing gangue minerals from the chromite.This work investigated on the application of different dry high ...
A study on the recovery of fine chromite from UG2 tailings
Chromite recovery from UG2 tailings by physical separation and flotation was studied. • Desliming, magnetic separation and acidic flotation (pH2.5) achieved target grades. • Results on deslimed feed at natural pH with various collectors have been promising. • Further work is underway on spiral concentrates, collector addition and froth ...
BENEFICIATION OF MAGNETITE RICH CHROMITE ORE …
136 2000; Aslan and Kaya, 2009; Tripaty et. al, 2012]. Magnetic susceptibilities for magnetite and chromite are presented at Table 1. It is pertinent to note that chromite is
MAGNETIC SEPARATION OF CHROMIUM-CONTAINING LATERITES …
Magnetic properties of chromium-containing laterites from the Philippines and Vourinos deposit, Greece, were investigated. Magnetic properties of the main minerals in the ore, chromite and ...