Chemical In Nickel Leaching Mineral
High pressure acid leaching of a refractory lateritic nickel ore
Physicochemical Problems of Mineral Processing, 2016. In this study, the effects of acid/ore ratio (0.1-0.6 g H2SO4/g dry ore), leaching temperature (200–240 °C) and leaching time (30–120 minutes) on the high pressure sulphuric acid leaching of a lateritic nickel ore sample having 1.37% Ni, 0.076% Co and 47.72% Fe2O3 were investigated.
(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 ...
(PDF) Atmospheric Leaching of Nickel Laterites with …
Physicochemical Problems of Mineral Processing, 2016. In this study, the effects of acid/ore ratio (0.1-0.6 g H2SO4/g dry ore), leaching temperature (200–240 °C) and leaching time (30–120 minutes) on the high pressure sulphuric acid leaching of a lateritic nickel ore sample having 1.37% Ni, 0.076% Co and 47.72% Fe2O3 were investigated.
Laterite nickel hydrometallurgical residues characterization …
Atmospheric leaching (AL) residues are dominated by compounds in the form of the mineral Fayalite with a high Si content (Si > 50%). Furthermore, Jarosite is a residue of the precipitation process of Fe impurities dissolved in Pregnant Leach Solution (PLS).
Roasting and Leaching Behavior of Nickel Laterite Ore
Basturkcu and Acarkan used sulfuric digestion followed by roasting and leaching for nickel and iron extraction from a nickel laterite ore containing mainly quartz and goethite. …
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 understanding of the …
Heap Leaching
Heap leaching is the most important method of hydrometallurgical copper extraction. Heap leaching is used for treating oxide and lower-grade secondary sulfide ores that contain up to ∼2% Cu. The ore is crushed to a uniform particle size (typically 12–50 mm), often agglomerated, and then stacked on large flat-topped heaps in a controlled manner.. Heaps are typically ∼7 m high …
The Direct Leaching of Nickel Sulfide Flotation Concentrates …
Operating conditions of the leaching process and metal extractions during leaching for a given nickel concentrate are presented. Adapted from Nyman et al. (1992) Honey, Muir, and Hunt (1997) and ...
Advances in microbial leaching processes for nickel extraction …
Lateritic nickel minerals constitute about 80% of nickel reserves in the world, but their contribution for nickel production is about 40%. The obstacles in extraction of nickel from lateritic minerals are attributed to their very complex mineralogy and low nickel content. Hence, the existing metallurgical techniques are not techno-economically feasible and environmentally …
Leaching of nickel from a secondary source by sulfuric acid
Bartolozzi et al. [14] described a hydrometallurgical process for the recovery of nickel and cadmium from Ni-Cd spent batteries. After the primary treatment (grinding, drying, mechanical separation), leaching of powder obtained from primary treatment was conducted with H 2 SO 4 and H 2 O 2 at pH = 0.3 for 60 min at 60 °C. As a result, 98% nickel was recovered …
Use of Ultrasound in Physical and Chemical Mineral …
As a result, while 46.29% nickel leaching rate was obtained in 5 h by conventional leaching, it increased to 60.41% under the optimum conditions of 30% sulfuric acid and 10% hydrogen peroxide concentration, 333 K temperature, …
Leaching of Nickel and Cobalt from a Mixed …
In this study, the dissolution of a mixed nickel–cobalt hydroxide precipitate using organic acids (citric, oxalic, and malic acid) was investigated. Citric acid was found to be the best leaching agent yielding the following …
(PDF) Kinetics of leaching: a review
The effect of various leaching parameters (including leaching agent, temperature, particle size, agitation, and solid to liquid ratio) on the rate of dissolution is summarized.
Nickel leaching from low-grade nickel matte using aqueous …
The results show that increasing leaching temperature and concentration of ferric chloride increases the nickel leaching ratio. The overall nickel leaching process follows the unreacted shrinking core model, and the surface chemical reaction is the rate-controlling step. The activation energy and the reaction order of the nickel leaching ...
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 …
Leaching and Solution Chemistry (Chapter 3)
Clays in the Minerals Processing Value Chain - August 2017. ... Journal of Chemical Technology & Biotechnology, 81 (4), 688 ... Pressure acid leaching of nickel laterites: A review. Mineral Processing and Extractive Metallurgy Review, 21 (6), 527 ...
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 extracted into the PLS but, …
Hydrometallurgical nickel and cobalt plants and processes
Similar leaching circuits are used for leaching metallic and intermediate nickel and cobalt products. The leaching process results in an aqueous nickel and/or cobalt sulfate solution. This solution is further treated through iron, manganese, and other impurity-removal and solvent-extraction stages. The solid residue from the leaching is a
Leaching of Copper, Cobalt, and Nickel from Complex Ore
The paper focuses on leaching of complex copper–cobalt–nickel ore from Mwinilunga district in Zambia, containing 0.6% Cu, 0.21% Co, 2.6% Fe, and 0.13% Ni. Mineralogical examination of the ore using scanning electron microscope (SEM) showed that copper, cobalt, and nickel exist in fine particles of heterogenite and limonite mineral phases.
High pressure acid leaching of a refractory lateritic nickel ore
This paper describes the experimental findings of the extraction of nickel and cobalt by high pressure acid leaching (HPAL) of a refractory limonitic nickel laterite ore from the …
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 and reduction steps, which then leads to energy savings (Buyukakinci, 2008).The acceptable nickel content in this method is 1–5% (Dalvi et al., 2004).Also, the crushed ore is dissolved directly with sulfuric acid …
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 ...
Leaching Kinetics of Limonite-Type Laterite Nickel Ore from …
The results show that the kinetic models for the leaching of nickel and iron are consistent with the chemical reaction model, which can be expressed by the linear equation 1 …
The Use of Acid Leaching to Recover Metals from Tailings: A …
Mine tailings deposits are often overlooked by the industry, posing significant environmental challenges due to chemical hazards and inadequate maintenance. Nevertheless, such mineral deposits hold considerable economic potential for processing, and the adoption of innovative technologies may also address critical chemical and physical stability issues. …
Leaching of Nickel and Cobalt from a Mixed Nickel-Cobalt …
Nickel (Ni) and cobalt (Co) are strategic metals that have found applications in a wide range of metallurgical and industrial uses. In this study, the dissolution of a mixed nickel–cobalt hydroxide precipitate using organic acids (citric, oxalic, and malic acid) was investigated. Citric acid was found to be the best leaching agent yielding the following …
Leaching and Recovery of Metals
Leaching is the key unit operation in metallurgical processes. It is the dissolution of metals from their natural ores into a liquid medium. Leaching processes are classified based on the method used for the leaching of metals, …
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 …
Comparison of chemical and biological leaching methods …
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.
Pressure Acid Leaching of Nickel Laterites: A Review: Mineral
It is shown that laterites can vary significantly in their mineralogy according to location, climate and depth, and that the main host minerals for nickel and cobalt can be either …
Metallurgy
Metallurgy - Leaching, Extraction, Refining: Oxides are leached with a sulfuric acid or sodium carbonate solvent, while sulfates can be leached with water or sulfuric acid. Ammonium hydroxide is used for native ores, carbonates, and sulfides, and sodium hydroxide is used for oxides. Cyanide solutions are a solvent for the precious metals, while a sodium chloride …
Review on comprehensive utilization of nickel laterite ore
Under atmospheric leaching conditions, the leaching behaviors of nickel and iron in nickel laterite ore are quite similar, with their leaching rates exhibiting a significant linear …
Ammonia leaching process for selective extraction of nickel …
The hydrometallurgy is appropriate for processing limonite laterite ore and other minerals with low nickel content. ... This demonstrates that in the ammonia leaching process, interfacial chemical interactions regulate the Ni and Co leaching. CRediT authorship contribution statement. Xiujuan Hu: Conceptualization, ...
Nickel extraction from low grade laterite by agitation leaching at atmospheric pressure
saprolite. The ore is dried and nickel is selectively reduced (together with cobalt and some iron) to metallic nickel at ~ 700°C. The metallics are extracted by leaching in an ammoniacal solution. …
Mineral Raw Material Leaching
Atmospheric pressure leaching is commonly used in raw materials leaching of chemical mineral processing. According to the leaching agents, the leaching process can be divided into two types. (1) Aqueous leaching. Inorganic chemical reagents (acid solution, alkali solution, and brine solution) or water are used as leaching agents.