Atmospheric Ammonia Leach Matte
ATMOSPHERIC LEACHING OF MATTE AT THE PORT …
In a first stage atmospheric leach in a typical Sherritt Ni–Cu matte leach process, a Ni–Cu–Fe–S Peirce Smith converter matte is contacted with recycled copper spent electrolyte (an ...
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Chemistry of the Ammonia Pressure Process for
The paper relates to the laboratory and pilot plant studies that have been carried out by Sherritt Gordon Mines Ltd., Metallurgical Research Div., in developing the ammonia pressure leach process for extracting copper, nickel, cobalt, and sulphur from high grade nickel concentrate produced from Lynn Lake ores, and describes in some detail the chemistry of the process.
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A method for extracting valuable metals from low nickel matte …
Based on the above considerations, direct treating low nickel matte by non-oxidative leaching using H 2 SO 4 under atmospheric pressure for extracting nickel, cobalt, copper and precious metals may be a choice. In this paper, the low nickel matte is treated directly by hydrometallurgical process instead of converting, which will avoid a large loss of cobalt.
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Full article: The Direct Leaching of Nickel Sulfide Flotation
2.1. Ammoniacal lixiviants. The ability of ammonia (NH 3) to selectively dissolve Ni, Cu, and Co from sulfidic materials (concentrate, matte, and mixed sulfide precipitate) …
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Atmospheric acid leaching of nickel laterites review
This review examines the atmospheric leaching (AL) of nickel laterite ores with sulphuric acid, specifically the limonite, smectite (clay) and saprolite fractions. The kinetics and mechanism of leaching of the key minerals are reviewed together with methods for enhancing nickel recovery. Existing and developing AL processes for extracting ...
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Nickel Laterite Metallurgy
After drying the laterite-nickel ore, a multiple-hearth furnace is used for reduction roasting to reduce nickel oxide, cobalt oxide and about 20% of iron oxide to metallic form, and then the roasting burden is leached using a mixed solution of ammonia and ammonium carbonate, under the effect of air oxidation, so that the metallic nickel, cobalt ...
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Recovery of nickel oxide nanorods from a laterite-originated
Leaching by ammonia is well defined in the extractive metallurgy of nickel such as the Sherritt ammonia pressure leach process for sulfidic ores and the Caron process for laterites. Ammonia leaching processes bring selectivity, low toxicity (as compared with commercial reagents such as carbonyl), low cost, and ease of ammonia regeneration by ...
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The chemistry of the nickel-copper matte leach and its …
DOI: 10.1016/0304-386X(92)90022-R Corpus ID: 96073709; The chemistry of the nickel-copper matte leach and its application to process control and optimisation @article{Hofirek1992TheCO, title={The chemistry of the nickel-copper matte leach and its application to process control and optimisation}, author={Z. Hofirek and D. G. E. Kerfoot}, journal={Hydrometallurgy}, …
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An experimental evaluation of the leaching kinetics of PGM …
In a first stage atmospheric leach in a typical Sherritt Ni-Cu matte leach process, a Ni-Cu-Fe-S Peirce Smith converter matte is contacted with recycled copper spent electrolyte (an aqueous copper sulphate/sulphuric acid solution) at 85 °C with the purpose of dissolving nickel, while simultaneously removing copper from solution. In the PGM industry, copper removal is also …
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Exploring the Global Importance of Atmospheric Ammonia …
Ammonia (NH3) is the dominant source of reduced nitrogen in the atmosphere, emitted primarily from agricultural activities. Current representations of NH3 in global chemical transport models (CTMs) largely focus on the thermodynamics governing aerosol formation, ignoring the atmospheric oxidation of NH3 with the hydroxyl (OH) radical since this process is …
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Atmospheric ammonia and its impacts on regional air …
Atmospheric ammonia (NH 3) has long been recognized as the key important air pollutant contributing to eutrophication and acidification of ecosystems 1,2,3,4.More recently, it has been shown that ...
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Parametric Effects on Leaching Behavior of Nickel-Copper Matte in Ammonia
The repulping process may be considered to be basically a nonoxidative atmospheric leach stage since leaching of the matte starts immediately when it comes into contact with the CuSO4– H2SO4 repulping solution. ... by the use of atomic absorption spectroscopy (AAS) and inductively coupled plasma (ICP). 3. Results and Discussion Ammonia leach ...
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Phosphoric Acid Leaching of Ni–Co–Fe Powder Derived from …
Under the conditions of H 3 PO 4 concentration of 3 mol/L, leaching time of 2 h and a liquid-to-solid ratio of 100 mL/g, the effects of leaching temperature on the extractions of varying metals were evaluated (Fig. 5a). The leaching efficiency of Fe, Ni, and Co all increased as the leaching temperature rose from 25 to 85 °C. At a leaching temperature of 85 °C, the …
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Ammonia Leaching: A New Approach of Copper Industry in …
Ammonia and ammonium salts have been recognized as effective leaching agents in hydrometallurgical processes due to low toxicity and cost, easy recovery and high selective recovery of metals. New research findings on considerable advantages of leaching by these agents and elimination of problems associated with acid leaching have resulted in a new …
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Parametric Effects on Leaching Behavior of Nickel-Copper …
a leaching time of 270 min. Increase in temperature from. 50 to 60 C increased the recovery of copper from 35% to. 90%, and the nickel extraction from 15% to 60%, however, …
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Ammonia leaching in the copper industry: a review
Chalcopyrite is well known as being refractory to conventional leaching approaches at atmospheric pressure. The current study investigated a hybrid approach using aqueous ammonia as a pH modifier ...
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Recent Progress in Hydrometallurgical Processing of Nickel …
Matte smelting and smelting to ferronickel are energy-intensive, making it uneconomical to treat low-grade ore. ... An investigation on the reduction roasting and ammonia leach methods of treating lateritic nickel ore ... Precipitation of Nickel Hydroxide from Simulated and Atmospheric-Leach Solution of Nickel Laterite Ore, Procedia Earth and ...
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Çaldağ Nickel laterite atmospheric heap leach project
The purpose of the Çaldaǧ Nickel heap leach trial was to prove and demonstrate the leachability of Çaldaǧ Nickel laterites using atmospheric heap leaching process (AHL) with sulphuric acid.
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The Direct Leaching of Nickel Sulfide Flotation …
enriched sulfide material termed nickel matte. Typically, nickel concentrates destined for smelting have a combined base metals (Ni + Cu + Co) grade of 8% to above 20%, though ... A review of laboratory studies into atmospheric pres- ... Balachandra (1969) who studied ammonia pressure leach-ing of a copper-nickel concentrate containing 6.8% Ni ...
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Precipitation of Nickel Hydroxide from Simulated and Atmospheric-leach
Procedia Earth and Planetary Science 6 ( 2013 ) 457 â€" 464 1878-5220 2013 The Authors. Published by Elsevier B.V. Selection and/or peer review under responsibilty of Institut Teknologi Bandung and Kyushu University. doi: 10.1016/j.proeps.2013.01.060 International Symposium on Earth Science and Technology, CINEST 2012 Precipitation of Nickel …
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Selective leaching of nickel from low-sulfur Ni-Cu matte at atmospheric …
Therefore, the repulping stage is basically an atmospheric leach stage in which the matte containing mostly Ni and Cu is leached in copper-spent electrolyte from the tank house, resulting in ...
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Comprehensive Review on Metallurgical Upgradation …
The leach solution is boiled to recover the ammonia, while the thiosulphates and thiosulfonates are dismutated for ... Valuable metals were leached from the high-grade nickel matte by three-stage of atmospheric pressure leaching and one-stage of pressure leaching. ... ammonium sulfate and nickel sulfide ore were mixed according to the mass ...
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Full article: The Direct Leaching of Nickel Sulfide …
The main disadvantages of the Sherritt-Gordon ammonia leach process are the high cost of ammonia relative ... Conditions utilized in atmospheric pre-leach and pressure oxidation and extraction efficiencies are …
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The Direct Leaching of Nickel Sulfide Flotation …
enriched sulfide material termed nickel matte. Typically, nickel concentrates destined for smelting have a combined base ... A review of laboratory studies into atmospheric pres-sure leaching …
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A study on the oxidative ammonia/ammonium sulphate …
As far back as 1947, a direct ammonia leaching of Cu, ... Our recent study on atmospheric ferric chloride leaching of matte resulted in more than 90% leaching efficiency …
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Comprehensive Review on Metallurgical Upgradation …
According to the different leaching agents, there are two ways of pressure leaching: pressure ammonia leaching and pressure acid leaching. ... Xiao W, Sun F, Liu X, …
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Recent Progress in Hydrometallurgical Processing of Nickel …
Hydrometallurgical techniques such as heap leaching (HL), atmospheric leaching (AL), high-pressure sulfuric acid leaching (HPAL), Caron process, ... Matte smelting …
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A study on the oxidative ammonia/ammonium sulphate leaching …
The oxidative ammonia/ammonium sulphate leaching of an artificial matte was carried out to investigate the extraction behavior of copper, nickel, and cobalt.
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An experimental evaluation of the leaching kinetics of PGM …
In a first stage atmospheric leach in a typical Sherritt Ni–Cu matte leach process, a Ni–Cu–Fe–S Peirce Smith converter matte is contacted with recycled copper spent electrolyte (an aqueous copper sulphate/sulphuric acid solution) at 85 °C with the purpose of dissolving nickel, while simultaneously removing copper from solution.In the PGM industry, copper …
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Parametric Effects on Leaching Behavior of Nickel-Copper Matte in Ammonia
This study reports the influence of concentration of the solvent (ammonia), leaching temperature, leaching time, and pH on the recovery of nickel and copper from the matte. The elemental composition analysis of the matte indicated that it contains 23% copper, 37% nickel and 1.1% ferrous compound.
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