Nickel laterite ores account for over 60% of global nickel supply. They are the product of intensive deep weathering of serpentinites under humid tropical conditions.
The ore has a high content of iron and low content of nickel, with quartz, goethite, and dolomite being the major crystalline phases; the nickel-ferrous laterite ore was of the goethite type. The results of their study showed that goethite and hematite were the main minerals of the sample and nickel are scattered throughout the ore area.
ore deposits, but lesser known examples include lateritic gold deposits (e.g., Boddington in Western Australia) (Evans, 1993). Nickel laterites are the product of lateritisation of Mg-rich or ...
The physical and chemical nature of a nickel laterite deposit is a function of many factors, including the composition of the parent rock, the tectonic setting, climate, …
Chromite tailings ore sample was obtained from a MG chromite processing plant in the Western Limb of the Bushveld Igneous Complex (BIC), South Africa. Characterisation studies were carried out to quantify the different mineral phases, their liberation and association with each other [7]. Chemical composition of different sizes of the feed ...
In this paper, low-grade limonitic nickel laterite and chromite were synergistically utilized via the hybrid sintering process (i.e., pellet-sintering process) for high-quality Ni–Cr sinter preparation and great carbon emission reduction. Under the optimum process conditions, Ni–Cr sinter indices were substantially improved in the pellet …
The morphological and chemical composition of chromite in the partially-serpentinized harzburgite and oxide zone of two laterite profiles at the Goro lateritic nickel deposit, New Caledonia, were ...
quantity of Ni ore reserves comprising both lateritic and chromite overburden has been estimated at around 230 mil- lion tons containing 0.3 – 0.9% Ni (Bhoi et al. 2011 ).
with simulated leach liquors derived from leaching a nickel laterite. A synthetic leach, as shown in Table 1, was prepared from metal sulphate salts, and was intended to simulate leach liquor derived from leaching a typical nickel laterite. It was first extracted with Cyanex 272 at 10 vol/v% in Shellsol 2046AR as diluent.
The extremely fine size character of the chromite in lateritic materials will limit its recovery to about 50 pct of the contained chromium by conventional physical …
Huge quantity of raw chromite ore is being mined and beneficiated in various chrome ore beneficiation plants throughout the world to cater the customized needs of various end users. The mined high-grade lumpy ores are directed to Ferro chrome plant after sizing to the requirement of the metallurgical operation, while the low-grade ore is ...
mineral phases of laterite nickel ore are limonite, serpentine, chlorite, quartz, chromite and magnetite. In order to further study the beneficiability of laterite nickel ore, it is necessary to analyze the mineralogical characteristics of its main minerals by modern analytical means such as Table 1 Chemical composition of laterite nickel ore ...
The present article reviews the insight into the available hydrometallurgical approaches for treating laterite ores and the separation of nickel and cobalt from …
Characterization of Laterite Ore. The elemental and mineralogical characteristics of the starting laterite ore were characterized by ICP-OES, XRD, and SEM-EDS (Fig. 2). This ore was primarily composed of iron in the form of Fe(OH) 3; the other major component was Si, which was primarily present in the form of insoluble SiO 2.
Exposed chromite deposits in the Sukinda belt, Odisha, India, have already been identified and exploited; but a large part of the area is covered by laterite and remains unexplored.
To fill this gap, we have (i) first optimized a Cr SEP for Fe (oxyhydr)oxide-rich laterites using synthetic and natural Cr-bearing minerals and laterite references, (ii) used a …
1. Introduction. The acid-leaching tailings of laterite nickel ore are a hazardous waste generated by the laterite nickel ore industry [1], [2], [3].As global demand for nickel continues to rise and nickel sulfide resources decrease, the extraction of nickel resources from laterite nickel ores the main development trend of the global nickel …
A limonitic laterite ore sample from Sarchahan deposit located in Fars province, Iran, was utilized for the experiment. The run-of-mine (ROM) (20 kg) was crushed by jaw crusher and then by hammer mill to under 2.8 mm. Then, the ROM ore was sampled by coning and quartering method until a batch of about 5 kg were obtained.
The morphological and chemical composition of chromite in the partially-serpentinized harzburgite and oxide zone of two laterite profiles at the Goro lateritic nickel deposit, New Caledonia, were investigated to: (1) establish the melt conditions at the …
The results show that the low-grade laterite nickel ore is a typical weathering sedimentary metamorphic oxidized ore, with the main valuable elements of Ni, Co and Cr and the …
Lateritic deposits are a type of weathering product that forms in tropical and subtropical regions through the process of laterization. Laterization involves the leaching of silica and other soluble materials from rocks, leaving behind a residual concentration of iron and aluminum oxides. The resulting deposits, known as laterites, are characterized by …
on the ore type, i.e., magnesian chromite or ferrian type chromite. As the chromite ore is of magnesian chromite, magnetic separation is quite easy compared to the ferrian-type chromite ore ...
Chromite grains are distributed over a narrow range grain size (10–75 µm) in all studied Saqah laterite profiles; however, only approximately half of the chromite grains is present as the liberated phase (>95% free) in the Saqah profiles, except in Saqah-4, where it is approximately 70% and is distributed over the 19–53 µm sizes.
Nickel Laterite Ore Deposits: Weathered Serpentinites Charles R. M. Butt; Charles R. M. Butt 1. CSIRO Earth Science and Resource Engineering. Box 1130, Bentley, Western Australia 6102. E-mail: [email protected] Search for other works by this author on: GSW. Google Scholar.
The paucity of rare earth element (REE) within the typical Fe–Ni laterite ore and the preferential occurrence of Co (up to 0.31 wt%), REE content (up to 6000 mg/kg ΣREE), and REE-minerals along with Ni, Co, and Mn (asbolane and silicates) towards the lowermost part of the Lokris (C. Greece) laterite ore suggest that their deposition is ...
Typical chromite process flowsheet In some cases, chromite concentrates can be produced by 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 upgrading chromite where gravity concentration is followed by dry …
The laterite ore utilized in the study was sourced from a mining site located in Morowali, Indonesia. ... in ultrabasic rock formations. 33 In a recent study by Pownceby et al., 34 a detailed characterization was carried out on chromite ore sourced from South Africa. The primary mineralogical components were found to be spinel phases, primarily ...
Abstract The mineralogical characterization and occurrence of target elements in limonitic laterite from Africa was comprehensively studied by X-ray diffraction (XRD), scanning electron microscopy energy spectrum (SEM–EDS), and optical microscope (OM) measurements. The results suggest that laterite ore has a complex internal …
In this work, low grade nickel laterite sample from Indonesia for a subsequent Ni enrichment mechanism was studied to understand the association of Ni. 2 Experimental 2.1 Nickel laterite ore sample A low grade nickel laterite ore sample from Foundation item: Project (50974135) supported by the National Natural Science Foundation of China ...
Nickel is widely used in industrial processes and plays a crucial role in many applications. However, most of the nickel resource mainly exists as nickel oxide in laterite nickel ore with complex composition, resulting in difficulty in upgrading the nickel content using physical separation methods. In this study, high-grade ferronickel concentrates …
The low-grade siliceous chromite ore from Ghutrigaon, Odisha, India, containing ~ 16% Cr2O3, with Cr/Fe ratio of 1.97 and ~ 55% of SiO2, does not find any use in metallurgical industry and hence ...
Based on the complementary advantages of limonitic nickel laterite and chromite, co-sintering pot tests of the two ores were conducted in various chromite proportions and then strengthened by ...
A high nickel grade ferronickel was produced from laterite ore using the selective reduction-wet magnetic separation process, with the addition of sodium sulfate …
The total quantity of Ni ore reserves comprising both lateritic and chromite overburden has been estimated at around 230 million tonnes containing 0.3–0.9% Ni (Bhoi et al., 2011). While mining 1 tonne of chromite ore, around 6–7 tonnes of chromite overburden must be removed. A number of attempts have been documented to recover …
The Ramu nickel-cobalt laterite, of 25km², is the largest of the wet tropical nickel laterite deposits in Papua New Guinea. Recent drilling, mapping and geophysical data significantly improves ...
The serpentine, olivine, clay, chlorite, hematite, and magnetite are the major minerals, and the pyroxene, actinolite, limonite, and chromite are the minor minerals in the nickel laterite in ...
The established difference in the magnetic properties of chromium-containing minerals and limonite shows that the ore can be processed by magnetic separators for mechanical separation of the...
Transforming the leach residue into iron concentrate and chromium ore will solve the problem of environmental pollution caused by the leach residue and help …
The composition of low-grade laterite ore from Yuanjiang, Yunnan, China was tested by chemical analysis. Under 7% of CaF 2 for the adjuvant agent and 8% of anthracite for the reducing agent, the main metal nickel and iron in laterite ore (100 g) can be efficiently recovered after high temperature (1250 °C) reduction. The process is …