ammonium sulfide in nickel mining

ammonium sulfide in nickel mining

ammonium sulfide in nickel mining

Sulfide Mining Sierra Club. The mining of copper/nickel sulfide ores is a toxic type of mining that is risky to our environment our workers and communities and local economi Mining sulfide rock releases acid and toxic metals and contaminants that pollute rivers and groundwater for hundreds of years long after the profits are spent and the products buried in landfills...

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Ammonia Pressure Leach Process for Recovering Nickel ...

"IntroductionTHE LYNN LAKE MINE, situated in Manitoba about 150 miles north of Sherridon, has been actively developed by Sherritt Gordon Mines, Limited, during the past seven years, resulting in the establishment of a proven reserve of over 14,000,000 tons of ore containing 1.223 per cent nickel, 0.618 per cent copper, and additional cobalt values.

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The leaching of metal sulfides in ammoniacal carbonate ...

2018-4-4  SEM/EDX analysis of the nickel sulfide sample used in the leaching tests (A) SEM image of the nickel sulfide particles, (B) corresponding spectra for image (A), and (C) EDX image showing the spots that were quantitatively analysed..... 41 FIGURE 23. The effect of ammonia concentration on the leaching efficiency of nickel from nickel

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Unsupported NiMo Sulfide Catalysts Obtained from Nickel ...

2008-6-24  Ammonium and tetraalkylammonium tetrathiomolybdates impregnated with nickel nitrate were used as precursors of unsupported NiMo sulfide catalysts. The precursors were decomposed either in situ during the course of a dibenzothiophene (DBT) hydrodesulfurization (HDS) test or ex situ through sulfidation by H2S/H2 (15% v/v H2S). The catalysts were characterized by thermogravimetric

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Porous and Hierarchically Structured Ammonium Nickel ...

2019-7-11  A novel ternary composite composed of ammonium nickel molybdate, nickel sulfide and reduced graphene oxide (ANM-NiS-rGO) has been synthesized by using a

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Recovery of Nickel and Copper from Polymetallic Sulfide ...

Ammonium chloride could react with nickel/copper oxides to produce intermediate complexes. At the temperature range of 280~340 oC, these complexes further decomposed to the corresponding simple chlorides. Roasting sulfide concentrate using NH 4 Cl is effective for complex ores.

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Enhanced methods for nickel recovery from low-grade

2021-8-14  Hydrogen sulfide is injection to precipitate nickel and other sulfides. From here, there is further leaching to remove iron and copper, and finally precipitation of nickel by addition of ammonia, ammonium sulfate, and hydrogen.

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Alkaline leaching of nickel bearing ammonium jarosite ...

2015-5-1  The ammonium jarosite precipitate used in the present study was generated from Impala Base Metal Refinery (BMR). The elemental analysis of the ammonium jarosite was performed using “RigakuZSX Primus II” X-ray fluorescence (XRF) and the results are presented in Table 1.It can be seen that the jarosite precipitate contains a 3.5% mass of nickel at a concurrence of 41.3% of iron.

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How Sherritt Refines Nickel

2010-10-1  The high cobalt feeds consist mainly of mixed nickel and cobalt sulphides. These feed materials are blended with an ammonium sulphate leaching liquor in a repulp tank and then the slurry is pumped into autoclaves. In the autoclaves, most of the metals are dissolved into the leach liquor at elevatedpressure and temperature. The resulting slurry passes to a lamella thickener where the leach liquor is separated from the solid residue. The solid residue containing mostly iron oxide and some residual unleached sulphides

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RANKED: World's top ten biggest nickel mines -

2021-6-21  MINING.COM and sister company MiningIntelligence compiled the 10 largest nickel operations worldwide, based on production in 2020. Russia’s Norilsk Nickel’s (Nornickel) Kola

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The leaching of metal sulfides in ammoniacal carbonate ...

2018-4-4  SEM/EDX analysis of the nickel sulfide sample used in the leaching tests (A) SEM image of the nickel sulfide particles, (B) corresponding spectra for image (A), and (C) EDX image showing the spots that were quantitatively analysed..... 41 FIGURE 23. The effect of ammonia concentration on the leaching efficiency of nickel from nickel

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Sulfide Mining Minnesota Center for Environmental

2021-8-14  Sulfide-ore mining for copper and nickel, however, has never been attempted here. In the case of PolyMet, MCEA has led the fight for accountability and true science-based decision-making. MCEA lawyers and experts have time and again cast light on the flaws inherent in the PolyMet proposal, first in the environmental review and permitting ...

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Sulfation Roasting of Nickel Oxide–Sulfide Mixed Ore ...

Sulfation Roasting of Nickel Oxide–Sulfide Mixed Ore Concentrate in the Presence of Ammonium Sulfate: Experimental and DFT Studies Guangshi Li 1, Xiaolu Xiong 1,*, ...

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A Novel Ammonium Chloride Roasting Approach for the

In this study, we propose a novel temperature-programmed ammonium chloride (NH 4 Cl) roasting-water-leaching process to extract nickel (Ni), cobalt (Co), and copper (Cu) from polymetallic sulfide minerals in a synchronous, efficient, and environment-friendly manner. During the roasting process, several vital parameters were investigated to achieve the high co-sulfation of Ni, Co, and Cu.

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Porous and Hierarchically Structured Ammonium Nickel ...

2019-7-11  A novel ternary composite composed of ammonium nickel molybdate, nickel sulfide and reduced graphene oxide (ANM-NiS-rGO) has been synthesized by using a two-step hydrothermal method for the first time. The morphological analysis reveals

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Chemistry of the Ammonia Pressure Process for Leaching

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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(PDF) Ammonia leaching in the copper industry: a review

In this process, ammonia leaching of sulfide minerals of copper, nickel, cobalt and iron was conducted at a. temperature of about 105 °C and air pressure of 8 ATM. Under these c onditions, copper ...

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The recovery of nickel from high-pressure acid leach ...

2006-9-1  1.. IntroductionAt the 1996 ALTA Nickel Conference, Cognis introduced the concept of treating nickel laterites (Mackenzie et al., 1996) using a high-pressure acid leach (HPAL) followed by mixed hydroxide precipitation (MHP), ammonia releach of nickel and cobalt and the refining of nickel using LIX ® 84-INS based solvent extraction (SX).In the intervening years this process has received ...

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Nickel mining: the hidden environmental cost of electric ...

2017-8-25  The mining and processing of nickel-rich ores can generate high loadings of dust in the air, that contains high concentrations of potentially toxic metals, including nickel itself, copper, cobalt ...

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Top nickel miners ranked - MINING.COM

2018-9-18  Top Nickel Miners and Total Production From Mines. Vale – 243 kilotonnes – The integrated Brazilian miner is the top nickel producer. It gets a big lift from Canada where both its top ...

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ammonium sulfide in nickel mining - niezalezne-opinie

The Southern African Institute of Mining and Metallurgy base metals from low-grade base metal sulfide concentrates from the Tati Nickel Mining. Company. Ammonia forms a soluble ammonium sulfate product which reports to the raffinate.

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Sulfide Mining Minnesota Center for Environmental

2021-8-14  Sulfide-ore mining for copper and nickel, however, has never been attempted here. In the case of PolyMet, MCEA has led the fight for accountability and true science-based decision-making. MCEA lawyers and experts have time and again cast light on the flaws inherent in the PolyMet proposal, first in the environmental review and permitting ...

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Question #98443 Socratic

2016-9-19  Nickel(II) chloride, #"NiCl"_2#, will react with ammonium sulfide, #("NH"_4)_2"S"#, to form nickel sulfide, #"NiS"#, and ammonium chloride, #"NH"_4"Cl"#. The idea here is that both reactants are soluble ionic compounds, as shown by the solubility rules listed below. Nickel sulfide is an insoluble solid that precipitates out of solution, while ammonium chloride is a soluble ionic compound that ...

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Unsupported NiMo Sulfide Catalysts Obtained from Nickel ...

2008-6-24  Ammonium and tetraalkylammonium tetrathiomolybdates impregnated with nickel nitrate were used as precursors of unsupported NiMo sulfide catalysts. The precursors were decomposed either in situ during the course of a dibenzothiophene (DBT) hydrodesulfurization (HDS) test or ex situ through sulfidation by H2S/H2 (15% v/v H2S). The catalysts were characterized by thermogravimetric

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The life of Ni - Nickel Institute

The world’s nickel resources are currently estimated at almost 300 million tons. Australia, Indonesia, South Africa, Russia and Canada account for more than 50% of the global nickel resources. Economic concentrations of nickel occur in sulphide and in laterite-type ore deposits. Despite the fact that nickel mining has significantly increased over

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Environmental Guidelines for Nickel Smelting and Refining

2018-8-5  process used for nickel. Chloride electrolytes are used although sulfuric acid solutions are used more often. Waste Characteristics Air emissions Sulfur dioxide (SO2) is a major air pollutant emitted in the roasting, smelting and converting of sulfide ores (nickel sulfide concentrates contain 6-20% nickel and up to 30% sulfur).

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FROTH FLOTATION : RECENT TRENDS Flotation of

2011-12-1  History of Sulphide ore flotation dates back to beginning of 20th century. Sulphide ores are major sources of base metals like Copper, Lead, Zinc, Nickel, Cobalt etc. Beneficiation of these base metal sulphide minerals is predominating through froth flotation technique. This technology has acclaimed importance as a versatile process for

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The recovery of nickel from high-pressure acid leach ...

2006-9-1  1.. IntroductionAt the 1996 ALTA Nickel Conference, Cognis introduced the concept of treating nickel laterites (Mackenzie et al., 1996) using a high-pressure acid leach (HPAL) followed by mixed hydroxide precipitation (MHP), ammonia releach of nickel and cobalt and the refining of nickel using LIX ® 84-INS based solvent extraction (SX).In the intervening years this process has received ...

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SAFETY DATA SHEET - Fisher Sci

SAFETY DATA SHEET Creation Date 15-Jun-2009 Revision Date 18-Jan-2018 Revision Number 4 1. Identification Product Name Ammonium Sulfide Solution Cat No. : A705-225; A705-250; A705-500 Synonyms Diammonium sulfide; Ammonium monosulfide; Ammonium sulfide ((NH4)2S) Recommended Use Laboratory chemicals. Uses advised against Not for food, drug, pesticide or biocidal product use

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Anaconda Nickel Ltd Nickel and Cobalt Mine - Mining ...

2021-7-21  It is based on the mining and processing of lateritic ore for the production of up to 40,000t/y of nickel and 2,500t/y of cobalt briquettes with a design cash cost of $2.00–2.40/lb of nickel, making it one of the world’s largest and lowest-cost nickel

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