Leaching Kinetics of Limonite-Type Laterite Nickel Ore from …
The leaching behavior of nickel and iron in limonite-type laterite nickel ore was studied through ammonium hydrogen sulfate atmospheric leaching. The leaching …
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Bioleaching of Lateritic Nickel Ores | SpringerLink
Pressure acid leaching has been applied to the Caron process to reduce high-energy consuming phases in direct ore leaching. Direct leaching eliminates the need for drying …
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STIMULATION OF CHEMICAL AND ELECTROCHEMICAL LEACHING …
A method of chemical and electrochemical gold leaching from a refractory concentrate is scientifically substantiated and tested in [24, 25]. This method is based on the use of sodium chloride solution electrochemically treated in an undivided cell (without membrane separation of the electrode space) as a solvent, after treatment it is …
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Table 1 . Chemical composition of nickel …
Download Table | Chemical composition of nickel hydroxide precipitate determined by AAS analysis from publication: Precipitation of Nickel Hydroxide from Simulated and Atmospheric-leach Solution ...
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The role of mechanical activation on atmospheric leaching …
The effect of mechanical activation on the atmospheric pressure leaching of a lateritic nickel ore was investigated to develop a superior alternative. Under the influence of mechanical activation, certain physico-chemical changes were observed. Accelerated leaching kinetics and less sulfuric acid consumption were found as the …
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Characterization of Nickel in Chromite Beneficiation Tailings …
This study investigated the recovery of nickel from tailings (0.2% Ni) obtained in a chromite beneficiation plant using H2SO4 leaching followed by oxalic acid precipitation. The tailings were characterized using mineral liberation analysis. Ni was found as Fe-Ni, Fe-Ni-Co sulfide minerals, which were encapsulated in serpentine, …
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Extraction Behavior of Nickel and Cobalt From Serpentine …
The demand for nickel has been steadily increasing in the 21st century, primarily driven by the rising demand for electric vehicle batteries. Nickel in laterite is associated within silicate in saprolite ore and hydroxide/oxide in limonite ore. Recently, the sulfation–roasting–leaching process has been developed to address the challenges of …
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Roasting and Leaching Behavior of Nickel Laterite Ore
Abstract Nickel is mostly extracted from sulfide ores, however, laterite ores account for over 60 pct of all nickel resources in the world, and despite its …
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Full article: The Direct Leaching of Nickel Sulfide …
Nickel dissolution from the concentrate is proposed to take place either via low temperature (100 – 120°C) or high temperature (>200°C) pressure oxygen leaching. For the former case, ultra-fine …
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Stainless Steel Leaches Nickel and Chromium into Foods …
These SS grades differ by their chemical compositions of metals including nickel and chromium. SS grade 304 contains approximately 18–20% mass fraction chromium, and 8–12% nickel, whereas SS grade 316 contain approximately 16–18% chromium, and 10–14% nickel; other metals may also vary within the grades ( 20 ).
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(PDF) Atmospheric acid leaching of nickel laterites review …
It is beyond the scope of this review to consider the acid leaching of nickel bearing oxide minerals in ocean nodules. Emerging AL technologies that employ hydrochloric acid and fungal or microbial metabolites (viz. organic acids) are examined in Part II of this review (McDonald and Whittington, in press). ... indicated that mass transport ...
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Complexation leaching of critical and strategic metals from nickel …
Cobalt (Co) and nickel (Ni) are considered critical and strategic materials since they are facing an increasing demand with projected supply risk and limited substitution (Simandl et al. 2015).Owing to their unique properties, Co and Ni are widely used in various industries such as automobile, aerospace, communication, …
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(PDF) Comparison of chemical and biological leaching …
The results of the chemical leaching experiments showed increase in nickel, cobalt and copper recovery with chloride addition as a result of increased leaching rate for pentlandite and chalcopyrite.
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An integrated process of CO2 mineralization and selective nickel …
The chemical and mineral compositions are shown in Table 1 and Fig. 2, respectively. The Olivine sample is mainly comprised of the mineral olivine, followed by some enstatite (MgSiO 3) and hydrated serpentine. The Olivine sample contains 0.22 % nickel and 0.0055 % cobalt. ... The CO 2 mineralization and selective leaching nickel …
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Effect of pretreatments to improve nickel leaching from …
The kinetic behavior of the nickel and iron leaching was adjusted to the chosen model (R2 = 0.977, 0.969, 0.9915, and 0.996 at 16, 20, 30, and 40 °C …
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Full article: The Direct Leaching of Nickel Sulfide …
Pentlandite is the most important nickel sulfide mineral and commonly occurs with pyrrhotite and chalcopyrite. ... The only processes developed to date employing chemical leaching of nickel concentrates …
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Eco-friendly and selective separation of nickel and copper …
Nickel is an important strategic metal resource, which plays an important role in national defense, aerospace, new energy and other fields. In recent years, low-grade nickel sulfide ore (LGNSO) has become the main raw materials for nickel extraction due to the depletion of high-grade nickel sulfide ore resources [1].However, the effect of the …
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Pressure Acid Leaching of Nickel Laterites: A Review
A review of the literature over the past 30 years on the processing of nickel laterites by high temperature acid leaching is conducted to provide a better …
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A comprehensive study on the leaching characteristics and …
Olivine is a silicate mineral primarily composed of magnesium and iron with the chemical formula of (Mg,Fe) 2 SiO 4.This mineral is typically found in mafic and ultramafic magmatic rocks that are formed deep in the upper mantle (Smyth et al., 2006).The unique …
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Ammonia leaching process for selective extraction of nickel …
The hydrometallurgy is appropriate for processing limonite laterite ore and other minerals with low nickel content. The benefits of hydrometallurgy include simultaneous recovery of cobalt while using less energy and cost [6], [7]. ... accomplishing the selective leaching of nickel, cobalt, and iron [17]. The primary process steps are: (1 ...
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High pressure acid leaching of a refractory lateritic nickel ore
Leaching temperature, leaching duration, sulfuric acid to ore weight ratio and particle size of the limonitic nickel laterite ore were studied. Optimum parameters determined as 255 o C, 0.30 sulfuric acid to ore weight ratio, a particle size of −850μ, 1 h of leaching duration with 30% w/w. 87.3% of Ni and 88.8% of Co in the ore …
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Chemical Mineral Processing
Since the 1940s, copper leaching plants, chemical mineral processing plants producing nickel and cobalt, and uranium leaching plants have appeared all over the world. After the 1960s, the rapid development of roasting, leaching and solution purification, and separation processes, especially the application of solvent extraction …
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Iron Recovery from Residue of Lateritic Nickel Leaching …
the pulp for enhancing the re covery of valuable minerals [13]. Some chemicals such as ... and phase transformation of residue from the lateritic nickel ore high-pressure acid leaching (HPAL ...
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Bioleaching and Chemical Leaching of Lateritic Ore in …
This work presents results of an initial exploration of nickel and cobalt bioleaching from lateritic ores in small percolators, which serve as simulations of the heap leaching process. Heap leaching offers an attractive alternative to high-pressure acid leaching of laterites, owing to its relatively simple technology, reduced capital and …
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Nickel extraction from low grade laterite by agitation …
Earlier studies indicated that nickel extraction from lateritic ores was strongly dependent on types of nickel bearing mineral, leaching temperature and sulfuric acid …
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How to Extract Nickel from Minerals Efficiently
Hydrometallurgical processes, like leaching, are also used, especially for lateritic ores rich in nickel. These methods involve chemical reactions to dissolve and separate nickel from the mineral ...
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The role of mechanical activation on atmospheric leaching …
Nowadays, due to the declining reserves of sulfide type nickel ores, there is a growing interest in laterite processing. Lateritic nickel ores, which have low nickel grade and complex mineralogy, constitute 70% of the world nickel resources (McDonald and Whittington, 2008). In many laterites, goethite is found as the major nickel bearing …
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Chemical Leaching of Inactive Gold Mine Tailings as a
Jouini, M., Perrin, M., Coudert, L. (2021). Chemical Leaching of Inactive Gold Mine Tailings as a Secondary Source of Cobalt and Nickel—A Preliminary Case Study. In: Anderson, C., et al. Ni-Co 2021: The 5th International Symposium on Nickel and Cobalt. The Minerals, Metals & Materials Series.
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Minerals | Special Issue : Bioleaching from Sulfide Minerals
Bioleaching for sulfide minerals is a technology that leaches useful metals using indigenous microorganisms (sulfide-oxidizing microorganisms, iron-oxidizing microorganisms, etc.). It is an ecofriendly and economical leaching technology compared to chemical leaching.
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Kinetics of nickel leaching from spent catalyst in sulphuric acid
The influence of H 2 SO 4 concentration on the leaching of nickel and aluminium from a spent catalyst was determined by varying the initial concentration of H 2 SO 4 from 1.0 to 5.0 M. The experimental results in Fig. 2 show that extraction of nickel and aluminium from a spent catalyst was not affected by H 2 SO 4 concentration for the …
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Nickel processing
Nickel processing - Extraction, Refining, Alloying: The extraction of nickel from ore follows much the same route as copper, and indeed, in a number of cases, similar processes and equipment are used. The major differences in equipment are the use of higher-temperature refractories and the increased cooling required to accommodate the higher operating …
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Mineralogical Characteristics and Preliminary Beneficiation of Nickel …
The reduction roasting ammonia leaching process (RRAL) originally defined by Caron (1950) has been extensively applied to treat low grade nickel laterite and a large amount of slag-containing some valuable metals, has been generated and accumulated over the years since then. However, there are no reports on how to utilize it …
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Kinetics of nickel leaching from spent catalyst in sulphuric acid
Ivascan and Roman (1975) published their studies on the recovery of nickel from a spent catalyst ammonia plant by leaching in sulphuric acid. The nickel was recovered as NiSO 4 with 99% yield. Al-Mansi and Abdel Monem (2002) studied the sulphuric acid leaching process for the recovery of nickel as a sulphate from a spent …
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A critical review on metallurgical recovery of iron from iron …
The leaching process of IOTs can be divided into two main types depending on the reaction and the medium: chemical leaching (e.g., acid leaching and alkaline leaching) and bioleaching. In recent decades, it has also received much attention due to its better adaptability and sustainability in recovering valuable elements from IOTs [56], …
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(PDF) Atmospheric pressure leaching of nickel from a low-grade nickel
Penelitian mengenai proses ekstraksi leaching logam-logam berharga dari mineral goethite semakin marak dilakukan, salah satunya proses leaching untuk melindih logam-logam seperti Ni dan Fe menjadi ...
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Kinetics of saprolitic laterite leaching by sulphuric acid at
Nickel-rich laterite ores are difficult to dissolve in ordinary mineral acid solution at atmospheric pressure, as laterite ores are residual products derived from a wide variety of rocks by intensive chemical weathering under strongly oxidizing and leaching conditions which leads to the incorporation of nickel into the crystal structure of laterite …
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Efficient reductive leaching of valuable elements from …
1. Introduction. High-temperature oxygen pressure leaching is the latest industrialized technology that uses high nickel matte which takes laterite as the source to produce nickel sulfate, and the leaching residue is produced in this process [1], [2].With the rapid development of new energy, the demand of nickel sulfate which is the main …
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Hydrometallurgical process for the separation and recovery of nickel
The world mineral industry is experiencing an unprecedented interest in nickel–cobalt extraction from laterite ores through acid leaching. However, the proposed purification-down stream processes differ substantially. ... The success of the process is based on the selectivity nickel leaching over iron, as the ores are limonitic and …
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