direct hydrometallurigical leaching technology

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Leaching of metals from hydrometallurgical residue by ...

References. A direct leaching on the hydrometallurgical residue with sulfuric acid was developed in this work. The influence of leaching temperature the leaching time the particle size and the sulfuric acid concentration was examined. Results of leaching studies that the recovery extraction of Zn Fe and Cu for hydrometallurgical residue increases with increasing acid concentration and temperature; while it decreases with particle size.

OutOtec HydrOmetallurgical Nickel PlaNts aNd PrOcesses

Outotec is the only technology provider who can offer technology and equipment for the entire nickel production chain from the mine to metal with project scope ranging from equipment packages to turnkey delivery. We have several process options such as pyrometal-lurgical versus hydrometallurgical nickel production

DEVELOPMENT OF HYDROMETALLURGICAL REACTOR LEACHING FOR ...

recovery: thiosulfate leaching for gold recovery and direct leaching for zinc recovery. The leaching processes studied are at different levels of technological development. Thiosulfate leaching can be considered a breakthrough technology that may initiate an era of cyanide-free gold production.

Hydrometallurgical Process - an overview | ScienceDirect Topics

The hydrometallurgical process included pressure leaching under slightly oxidising conditions in diluted sulphuric acid (at 80–105 °C and 140-350 kPa oxygen pressure). This enabled selective extraction of up to 97% of copper with less than 10% of pyrite taking part in the reaction.

US6428604B1 - Hydrometallurgical process for the recovery of ...

A hydrometallurgical process for the recovery of nickel and cobalt values from a sulfidic flotation concentrate. The process involves forming a slurry of the sulfidic flotation concentrate in an...

Leaching of Metals from Hydrometallurgical Residue by ...

A direct leaching on the hydrometallurgical residue with sulfuric acid was developed in this work. The influence of leaching temperature the leaching time the particle size and the sulfuric acid concentration was examined. Results of leaching studies that the recovery extraction of Zn Fe and

Direct hydrometallurgical separation of Zn(II) from brine ...

leaching of zinc hydrometallurgical residue. After brine leaching of ZLFC in the second stage aluminium powder was used for lead cementation process. Farahmand et al. (2009) reported optimum conditions for lead cementation obtained from brine leaching filtrate of lead-bearing zinc plant residue which resulted in lead sponge recovery of about 95%.

Hydrometallurgy - Wikipedia

Hydrometallurgy is a technique within the field of extractive metallurgy the obtaining of metals from their ores. Hydrometallurgy involve the use of aqueous solutions for the recovery of metals from ores concentrates and recycled or residual materials.

OutOtec HydrOmetallurgical Nickel PlaNts aNd PrOcesses

leaching circuit typically includes pulping pre-leaching pressure leaching in autoclaves feeding solid-liquid separation and scrubbing stages. The leaching reac-tions are exothermal. Particular attention is paid to safety issues in both process design and equipment design. The leaching process results in an aqueous nickel sulfate solution.

Progress and Status of Hydrometallurgical and Direct ...

Therefore significant efforts have been made to replace the commonly employed pyrometallurgical recycling method with a less detrimental approach such as hydrometallurgical in particular sulfate-based leaching or direct recycling. Sulfate-based leaching is the only large-scale hydrometallurgical method currently used for recycling LIBs and serves as baseline for several pilot or demonstration projects currently under development.

US5250273A - Hydrometallurgical leaching process and ...

A process and apparatus for leaching metal values from a particulate mineral ore containing metal values employs a fluidized bed of the particles; a leaching agent solution containing dissolved oxygen flows upwardly of the bed in a lower leaching zone to an upper clarification zone; a velocity profile is maintained to promote settling of particles so that the particulate solids remain in the ...

Hydrometallurgy - an overview | ScienceDirect Topics

Hydrometallurgical copper recovery can be conveniently considered in two stages: the leaching stage in which the various forms of copper in the ore are placed into an aqueous solution and the recovery stage where dissolved copper is recovered as solid nearly pure copper metal ready for fabrication or final smelting.

(PDF) Review of the past present and future of the ...

This review covers past technologies for hydrometallurgical processing of nickel and cobalt (Caron) current technologies (high-pressure acid leaching atmospheric leaching heap leaching)...

(PDF) DEVELOPMENTS IN THE HYDROMETALLURGICAL PROCESSING OF ...

alternative technology for processing low grade nickel laterite ores when compared with traditional energy intensive processes (e.g. autoclave/tank leaching). Howeve r the poor degree to which ...

Hydrometallurgy - Metso Outotec

The core hydrometallurgical technologies we have mastered include atmospheric and pressure leaching solvent extraction precipitation electrowinning and electrorefining.

DEVELOPMENT OF HYDROMETALLURGICAL REACTOR LEACHING FOR ...

The current work examines two hydrometallurgical reactor leaching processes used for metal recovery: thiosulfate leaching for gold recovery and direct leaching for zinc recovery. The leaching processes studied are at different levels of technological development. Thiosulfate

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direct hydrometallurigical leaching technology