hydrometallurgical process nickel

Hydrometallurgical Process - an overview ScienceDirect ...

Two hydrometallurgical processes for the recovery of nickel from oxide ores have been commercialized: the reduction roast–ammonium carbonate leach process and the sulfuric acid pressure leach process for the treatment of low magnesia content laterite ores. In general, smelting is applied to ores with greater than 1.7% nickel, while hydrometallurgy is used when nickel constitutes less than 1 ...

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Hydrometallurgical process for the separation and recovery ...

The proposed hydrometallurgical process for nickel recovery from real sulphate heap leach liquors consists of the following six (6) unit operations: (1) Removal of iron, aluminium and chromium, as easily filterable crystalline basic sulphate salts of the jarosite–alunite type, at atmospheric pressure, by chemical precipitation at pH: 3.5 and 95 °C.(2) Cobalt, manganese and magnesium ...

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Hydrometallurgical process for the separation and recovery ...

Hydrometallurgical process Nickel recovery abstract The Laboratory of Metallurgy of the National Technical University of Athens has developed and patented a novel integrated hydrometallurgical method, suitable to treat low-grade nickel oxide ores efficiently and economically. It involves heap leaching of the ore by dilute sulphuric acid at ambient temperature, purification of the leach ...

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Hydrometallurgical Processing - an overview ...

Hydrometallurgical processing makes it possible to precipitate nickel on the surface of different solid materials (continuous powder, hollow granules, particles in the form of threads, etc.). Grain size of the powder produced is determined by the size of seed powder top-charged in the autoclave and ranges from 20 to 2000 μm. The particle size and shape is controlled during densification ...

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OutOtec HydrOmetallurgical Nickel PlaNts aNd PrOcesses

lurgical versus hydrometallurgical nickel production, and our experts, who have broad and deep metallurgical knowledge, can offer our customers optimized and reliable process design based on their particular raw materials. With a global reputation for offering premier technologies for processing nickel concentrates, Outotec has recently developed new technologies for leaching ores, concen ...

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Hydromet Technology - Vale

The new hydrometallurgical process that Vale developed will process the nickel concentrate directly to metal products without first having to smelt the concentrate. The concentrate will be processed in a pressurized vessel where it will react with oxygen and sulphuric acid to produce an impure solution of nickel, cobalt and copper. This solution will pass through a number of chemical ...

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(PDF) Hydrometallurgical process for the separation and ...

The proposed hydrometallurgi- Laterite leach liquor cal process for nickel recovery from real sulphate heap leach liquors consists of the following six (6) unit Hydrometallurgical process Nickel recovery operations: (1) Removal of iron, aluminium and chromium, as easily filterable crystalline basic sulphate salts of the jarosite–alunite type, at atmospheric pressure, by chemical ...

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(PDF) Hydrometallurgical Processing of Nickel Laterites—A ...

PDF On Mar 11, 2019, Sait Kursunoglu and others published Hydrometallurgical Processing of Nickel Laterites—A Brief Overview On The Use of Solvent Extraction and Nickel/Cobalt Project For The ...

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HYDROMETALLURGICAL PROCESS FOR RECOVERY OF

A hydrometallurgical process for recovery of nickel and cobalt applicable to a pulp resulting from lateritic ore leaching, nickel oxidate, cobalt oxidate or a mixture with nickel and cobalt as metals of interest, and other secondary metals regarded as impurities such as manganese, magnesium, calcium, aluminum, iron and chromium wherein the pulp was previously processed with a) possible pH ...

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Hydrometallurgical process for the separation and recovery ...

Hydrometallurgical process Nickel recovery abstract The Laboratory of Metallurgy of the National Technical University of Athens has developed and patented a novel integrated hydrometallurgical method, suitable to treat low-grade nickel oxide ores efficiently and economically. It involves heap leaching of the ore by dilute sulphuric acid at ambient temperature, purification of the leach ...

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Derleme / HYDROMETALLURGICAL PROCESSING OF NICKEL ...

process. This process therefore is unsuitable for treating feed liquor with high manganese content. The DSX route is the newest addition among the three and has now been used in two commercial operations: Bulong (Australia) and Goro (New Caledonia). This process circumvents the need of intermediate precipitation of the nickel and cobalt

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US7563421B2 - Hydrometallurgical process of nickel

A hydrometallurgical process based on pressure leaching at elevated temperature for recovering nickel from nickel oxide ores, characterized by a simplified and efficient process as a whole, realizing a simplified leaching stage, reduced neutralizer consumption and precipitate production in the neutralization stage, and efficient use of recycled water.

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The Direct Nickel Process :: Total Materia Article

The Direct Nickel Process DNi is an atmospheric hydrometallurgical processing route designed to treat all types of nickel laterite ores, in a single flow sheet to produce a number of final saleable products. The key to the Process is the use of nitric acid as the leaching agent and the subsequent use of a patented recovery and recycling process returning +95% of the nitric acid for re-use. See ...

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(PDF) DEVELOPMENTS IN THE HYDROMETALLURGICAL

The DNi Process™ is an atmospheric hydrometallurgical process which is capable of treating all types of nickel laterite ores to produce a number of saleable products. It has been in development ...

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HYDROMETALLURGICAL PROCESS - CESL Wins Patent

01/12/2004  The CESL process involves autoclave leaching in a mixed chloride/sulphate environment that extracts the dissolved nickel by solvent extraction and electrowinning and eliminates the sulphur dioxide gas generation typical of nickel smelters. The process is an environmentally sound, low capital cost alternative to nickel smelting with broad applicability in the industry. It was developed at CESL ...

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Processing of Nickel Laterite Ores on the Rise

Both hydrometallurgical and pyrometallurgical approaches are utilized to process nickel laterite ores, with the best approach depending on the ore composition. The Solvent Extraction – Electrowinning (SX-EW) process continues to grow in popularity.

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Nickel: smelting, producing-Metalpedia

In hydrometallurgical processes, nickel sulfide ores undergo flotation (differential flotation if Ni/Fe ratio is too low) and then smelted. After producing the nickel matte, further processing is done via the Sherritt-Gordon process. First, copper is removed by adding hydrogen sulfide, leaving a concentrate of only cobalt and nickel. Then, solvent extraction is used to separate the cobalt and ...

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Hydrometallurgical Processes for the Recovery of Rare ...

Process Research ORTECH Inc. (PRO) has developed innovative mixed chloride leaching processes for the recovery of REEs from alumino-silicate ores, and nickel and cobalt from laterite ores. The addition of magnesium chloride in hydrochloric acid enhances the activity of the hydrogen ion by orders of magnitude, which permit rapid leaching rates at moderate temperature and atmospheric pressure ...

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Nickel / cobalt mining extraction procedures Industrial ...

06/09/2019  The chemical species of nickel and cobalt by hydrometallurgical chemical process are soluble sulfate salts, which are recovered from dissolution in a countercurrent decanting circuit (CCD). CCD involves washing the residue and recovering soluble nickel and cobalt. The remaining acid is neutralised using a calcium carbonate suspension, which produces a calcium sulfate precipitate.

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US4435369A - Hydrometallurgical process for extraction

A hydrometallurgical process for extracting nickel from comminuted nickel-bearing minerals. The process includes the steps of contacting the comminuting nickel-bearing minerals in an extraction zone with an aqueous solution having a concentration of chloride ions, metal ions and sulfuric acid at an elevated temperature and continuing the contact to form an extraction mixture slurry, including ...

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Characterisation and hydrometallurgical processing of ...

A hydrometallurgical process for recovering Ni from the bio-ore was then demonstrated. The processes involves the bio-ore (ash) being water-washed, yielding >90% recovery of K to solution. After water washing, >95% Ni recovery was achieved by H 2 SO 4 leaching at 60ºC, although long residence times and high acid concentrations were required. Ni(OH) 2 was then precipitated from solution using ...

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HYDROMETALLURGICAL PROCESS - CESL Wins Patent

01/12/2004  The CESL process involves autoclave leaching in a mixed chloride/sulphate environment that extracts the dissolved nickel by solvent extraction and electrowinning and eliminates the sulphur dioxide gas generation typical of nickel smelters. The process is an environmentally sound, low capital cost alternative to nickel smelting with broad applicability in the industry. It was developed at CESL ...

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The Direct Nickel Process Total Materia Blog

The Direct Nickel Process DNi is an atmospheric hydrometallurgical processing route designed to treat all types of nickel laterite ores, in a single flow sheet to produce a number of final saleable products. The key to the Process is the use of nitric acid as the leaching agent and the subsequent use of a patented recovery and recycling process returning +95% of the nitric acid for re-use. See ...

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Development of a hydrometallurgical process for nickel ...

Development of a hydrometallurgical process for nickel recovery . By Romain Barbaroux. Abstract. Cette recherche s’inscrit dans le contexte de la conception d’une filière originale comprenant la phytoextraction du nickel par la plante hyperaccumulatrice Alyssum murale, endémique des sols de serpentine d’Albanie et de sa valorisation de ce nickel, l’objectif étant d’arriver à un ...

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Hydrometallurgical process of nickel oxide ore -

A hydrometallurgical process for recovering nickel and cobalt from nickel oxide ores, comprising: (1) a leaching stage which stirs the slurried ore in the presence of sulfuric acid at 220 to 280° C. to produce leached slurry, (2) a solid-liquid separation stage which washes the leached slurry in multi-stages to produce pregnant liquor and leached residue, the pregnant liquor containing nickel ...

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Nickel: smelting, producing-Metalpedia

In hydrometallurgical processes, nickel sulfide ores undergo flotation (differential flotation if Ni/Fe ratio is too low) and then smelted. After producing the nickel matte, further processing is done via the Sherritt-Gordon process. First, copper is removed by adding hydrogen sulfide, leaving a concentrate of only cobalt and nickel. Then, solvent extraction is used to separate the cobalt and ...

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Unlocking Disseminated Nickel Sulphides using the CESL ...

Teck’s CESL Nickel Process offers a hydrometallurgical solution for unlocking the nickel from disseminated nickel ore deposits. It is capable of treating lower grade nickel concentrates; including those with a high content of magnesia. The process can also efficiently treat bulk nickel-copper-cobalt concentrates with no need for metal separation at the milling stage. This paper begins with ...

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Efficient and selective recovery of Ni, Cu, and Co from ...

Efficient and selective recovery of Ni, Cu, and Co from low-nickel matte via a hydrometallurgical process. Authors; Authors and affiliations; Guang-ju Chen; Jian-ming Gao; Mei Zhang; Min Guo; Article. First Online: 09 March 2017. 176 Downloads; 6 Citations; Abstract. Low-nickel matte was intensively characterized, and Ni, Cu, and Co were determined to exist mainly as (Fe,Ni) 9 S 8 and FeNi 3 ...

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Nickel / cobalt mining extraction procedures Industrial ...

06/09/2019  The chemical species of nickel and cobalt by hydrometallurgical chemical process are soluble sulfate salts, which are recovered from dissolution in a countercurrent decanting circuit (CCD). CCD involves washing the residue and recovering soluble nickel and cobalt. The remaining acid is neutralised using a calcium carbonate suspension, which produces a calcium sulfate precipitate.

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