Nickel laterite projects employing hydrometallurgical or pyrometallurgical processing have often suffered from high capital expenditure and cost blowouts, ... Hydrometallurgical processing of nickel flotation concentrate is carried out by Vale Limited at Long Harbor using nickel concentrate produced from the Voisey's Bay nickel deposit; ...
Laterite ore can be physically upgraded to increase its nickel grade by flotation when nickel oxide in the ore has sufficient sulfidation by adding sulfurizing agent at appropriate temperatures. To reduce production cost, the sulfidation of iron oxide should be controlled as the oxide will consume a large amount of the sulfurizing agent.
The best method to enrich the laterite ore is found to be hydrocycloning after grinding and then flotation of underflow after further grinding. With this method 60% of Ni is recovered with 3.3% Ni grade in concentration and 1.3% Ni grade in tailings. ... "Nickel laterite ores account for over 60% of global nickel supply. They are the product of ...
The extraction of nickel (Ni) from sulfide resources commences with flotation to produce a concentrate which is then smelted to produce a nickel-enriched phase called matte, and further refined to …
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 … Expand
Interest in low-grade Ni-laterite ores has increased in recent years; however, the laterite process has proven technically difficult and costly, and the development of alternative low-cost biotechnologies for Ni solubilization has been encouraged. In this context, for the first time, a sample of Brazilian Ni-laterite ore was subjected to microbial …
Nickel mineralization is normally present in one of two forms, as oxide minerals or as sulphide minerals. Historically, nickel sulphides have been preferred for nickel extraction as the composition of the minerals makes the nickel more efficient to extract, first by flotation to concentrate the nickel (e.g. to 20% purity) and second by smelting to …
DOI: 10.1016/J.MINENG.2013.02.016 Corpus ID: 98064476; Selective sulphidation and flotation of nickel from a nickeliferous laterite ore @article{Harris2013SelectiveSA, title={Selective sulphidation and flotation of nickel from a nickeliferous laterite ore}, author={C. T. Harris and John G. Peacey and Christopher A. Pickles}, journal={Minerals …
Flotation Results of reversed flotation of calcine laterite was observed through the influences of pH, doses of both collector and frother, percent solid of pulp, and iron as well as nickel recovery. Flotation time was determined at one stage rougher to exhaustion until the froth completely barren.
Laterite ores, for instance, display finely disseminated mineralisation in very small particles. Only ultrafine grinding will liberate nickel and cobalt in very fine particles, the recovery of which is relatively low in conventional flotation cells (Farrokhpay and Filippov, 2016).
The limonitic laterite ore was obtained from Papua New Guinea and dried at 105 °C for 24 h. The amounts of metal elements (iron, magnesium, aluminum, chromium, nickel, cobalt, and manganese) within the limonitic laterite ore were determined after total digestion with a mixture of acids, including hydrofluoric acid (HF), hydrochloric acid …
Nickel sulfide ores contain nickel as pentlandite, which can be efficiently separated and concentrated using flotation methods. This conventional beneficiation process reduces costs and yields a high-grade nickel concentrate that can be smelted into a saleable product. Laterite nickel ores are classified into limonite and saprolite.
Flotation has not been successful to recover nickel from laterite ores because of the fine-grain and low grade nickel. Nickel laterite deposits are generally divided into limonite (oxide ...
A recent comprehensive review on topics influencing nickel laterite flotation has shown that further investigations in the flotation of laterite ores are undoubtedly warranted (Farrokhpay and ...
In this paper, the process of solid-state metalized reduction and magnetic separation was investigated for preparation of nickel–iron concentrate from a low-grade laterite nickel ore. The effects of reduction temperature, reduction time, amount of dosages, and magnetic field strength on grades and recoveries of nickel and iron were …
However, it is not successful to upgrade nickel grade for limonite and nontronite laterite ore while only 40% upgrade in nickel grade for saprolite laterite ore was obtained through flotation process (Farrokhpay et al., 2018), which might due to the complex chemical and mineral compositions of nickeliferous laterite ore, and the way to …
Laterite ore is a valuable resource due to its high content of metals essential for modern technology, including nickel, iron, and cobalt. However, extracting nickel from laterite ores is challenging due to their complex mineral composition and low nickel concentrations. This study examined the leaching behavior of pre-roasted laterite ore …
0.17% and recovery rate of 23.17% can be obtained by positive and reverse flotation process. A chromium concentrate containing 35.17% Cr 2O ... laterite nickel ore, it is necessary to systematically characterize the process mineralogy of laterite nickel ore, that is, to construct the relationship ...
Nickel laterite may be divided into three main fractions within a given deposit . ... Previous work was directed toward producing a sulfide concentrate for flotation, where nickel and iron species in the limonite were sulfidized at conversions up to 80–90% and 40–50% respectively. A tradeoff was observed between the conversion of nickel ...
The challenges in processing nickel laterite ores using flotation process were comprehensively reviewed. Literature shows that flotation has not been successful to recover nickel from laterite ores. Nickel in laterite ores is often finely disseminated in various minerals in very fine size. Therefore, fine grinding can be useful to liberate …
4. Experimental procedure4.1. Preparation of flotation feed for preliminary testing. Samples of 2 kg SG laterite previously crushed to all passing 2 mm were slurried using 2 L of Adelaide tap water and stirred at 1200 rpm in a container for 10 min.After this time the slurry was wet screened at 600 μm, with the fines allowed to settle overnight …
Selective flocculation can help to enhance flotation performance of laterite ore. The challenges in processing nickel laterite ores using flotation process were comprehensively reviewed. Literature shows that flotation has not been successful to …
The extraction of nickel from sulfide ores typically commences with comminution and flotation to produce a sulfide concentrate, which is subsequently smelted and pyrometallurgically …
Previous studies involving the flotation of nickel sulphides have shown that the addition of triethylenetetramine (TETA) can be beneficial in improving flotation selectivity (Kelebek and Tukel, 1999). ... Study on selective reduction and magnetic separation of low grade nickel laterite ore to produce high nickel concentrate. In: XXV ...
Process mineralogy of low-grade laterite nickel ore in Indonesia was systematically characterized and the beneficiation process of mineral components such as limonite, serpentine and chromite was studied on the basis of process mineralogy. The results show that the low-grade laterite nickel ore is a typical weathering sedimentary metamorphic …
Sulfide ores are crushed and ground in order to liberate nickel minerals by selective flotation, in place of, or in conjunction with magnetic separators. ... Kerfoot D G E, Cordingley P D (1997) The acid pressure leach process for nickel and cobalt laterite. Part II: review of operations at Fort Saskatchewan. In: Proceedings of the nickel ...
gangue minerals, thus leading to nickel loss. Flotation Practice in Nickel Sulde Deposits Nickel sulRde minerals such as pentlandite can, in general, be separated from their gangue by Sotation using a thiol group of collectors like xanthates and alkyl dithiophosphates in the presence of variety of activators, depressants and dispersants. Since ...
Researchers have tried to improve nickel laterite flotation recovery by using a number of feed preparation techniques. A summary of the nickel grade upgrade using flotation reported in the literature is presented in Table 1. It can be seen that only minor nickel upgrades have been reported. Thus, the challenge of processing nickel …
This study investigates the characterization of Fanibi Laterite and the efficiency of froth flotation to beneficiate nickel from its host rock sourced in Akure, Ondo State, Nigeria.
To support the transformation to clean low carbon technologies, there is a demand for critical metals such as nickel. Awaruite is a less common nickel-bearing mineral with unique properties and responses to mineral separation. This paper presents the findings of a flotation study to recover awaruite from the Baptiste ultramafic deposit, …
The present article reviews the insight into the available hydrometallurgical approaches for treating laterite ores and the separation of nickel and cobalt from …
Mineralogy of laterites was found to be important in upgrading Ni by flotation. Nickel is sourced from sulphide and laterite ores. While 70% of the nickel resources …
In anticipation of future demands, a comprehensive understanding of the chemical and mineralogical characteristics of nickel-bearing minerals is a prerequisite to devising effective nickel beneficiation methods. Of particular importance are markers in the mineralogy of the flotation concentrate that inform beneficiation strategies to improve …
The challenges in processing nickel laterite ores using flotation process were comprehensively reviewed. Literature shows that flotation has not been successful to recover nickel from laterite ores.
This work aims to instigate upgrading the nickel content in laterite ore using flotation. After careful characterisation, the laterite samples were treated with different …
Nickel is a kind of silvery white ferromagnetic metal firstly separated by Swedish mineralogist A.F. Cronstedt in 1751. It is in the eighth group of the fourth period in the periodic table of elements, with atomic number of 28, atomic weight of 58.71, density of 8.9 g/cm 3 (20 ℃), melting point of 1455 ℃, and boiling point of 2915 ℃. The most …
Nickel laterite ore is used to produce nickel metal, predominantly to manufacture stainless steel as well as nickel sulfate, a key ingredient in the batteries that drive electric vehicles. Nickel laterite production is on the rise and surpassing conventional sulfide deposits. The efficiency of mining and processing nickel laterites is defined by …
Quast et al. (2015a) have concluded that the complex mineralogy of nickel laterite ores makes it difficult to achieve any significant nickel upgrading by physical techniques, including...
Flotation has not been successful to recover nickel from laterite ores because of the fine-grain and low grade nickel. Nickel laterite deposits are generally divided into limonite (oxide ...
Low-grade saprolite nickel laterite, characterized by complicated minerals composition and fine-grained and complex dissemination, was commonly treated with a low recovery efficiency of Ni and Fe by conventional methods. Hence, an improved direct reduction and magnetic separation process was proposed. Meanwhile, the mechanisms …
