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A novel hydrometallurgical treatment for the recovery of copper, …

In this work, an integral hydrometallurgical process consists of two ferric leaching steps, followed by a hot brine leaching stage, is proposed to recover target metals from a bulk sulphide concentrate (2.9% Cu, 7.4% Zn, 2.5% Pb, 67 ppm Ag and 37.2% Fe). ... Chloride leaching is a successful method to recover Pb and Ag from the catalysed …

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The Twelve Principles of Circular Hydrometallurgy

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Hydrometallurgical Processes for the Recovery of Metals from …

A solvometallurgical process has been developed to recover zinc from chloride-containing solid residues, e.g., EAF dust and the crude ZnO of the Waelz process [147,148,149]. It is based on reacting fine-grained ZnO with acidic extractants, particularly carboxylic acids, like naphthenic and Versatic (a mixture of branched carboxylic acids …

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WO2016008056A1

The process of claim 20, wherein the hydrous magnesium chloride is further dehydrated a second time in the fluidized bed dryer by spraying dry hydrogen chloride gas heated up to about 450°C. 22. The process of any one of claims 1 -21, wherein the electrolytic cell comprises a molten salt electrolyte.

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Metals | Free Full-Text | Hydrometallurgical Process for Zinc

The Waelz process is widely used to dispose of furnace dusts when the zinc content is higher than approximately 15–20%. In the 21st century, the Waelz process is used more widely than ever before. In this process, zinc-bearing dust is reductively heated in a rotary kiln to approximately 1200 °C [6,7,8]. Zinc, lead, chloride, and fluoride are ...

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The Twelve Principles of Circular Hydrometallurgy | Journal of

The heat generated in pyrometallurgical processes or exothermic hydrometallurgical process steps can be recovered and used during other stages in the flowsheet to increase the reaction rate or drive an endothermic process. ... Adham K, Harris C (2014) HCl acid regeneration for chloride based hydrometallurgical processes with …

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Article Hydrometallurgical Process for Zinc Recovery from …

The Waelz process is widely used to dispose of furnace dusts when the zinc content is higher than approximately 15–20%. In the 21st century, the Waelz process is used more widely than ever before. In this process, zinc-bearing dust is reductively heated in a rotary kiln to approximately 1200 °C [6–8]. Zinc, lead, chloride, and fluoride

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Efficient recycling of Pb from zinc leaching residues by using the

In the hydrometallurgical leaching process, the temperature rise effectively alleviate the bonding of mineral particles and contribute to molecular diffusion . The effect of temperature on leaching rate studied under the conditions as follows: reaction time of 120 min, the liquid-solid ratio of 6:1, calcium chloride concentration of 3.15 mol L ...

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Hydrometallurgical recovery of lead from spent lead

The lead in the raw material was recovered via a direct leaching–electrowinning process in calcium chloride solution. Different from the traditional hydrometallurgical processes used to treat the lead paste, this new process does not require the desulphurisation step. ... An innovative and efficient process for the …

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Hydrometallurgical Zinc Plants and Processes

After copper and chloride removal, cobalt and nickel are removed through Outotec's continuous arsenic process, through the addition of arsenic trioxide and zinc dust. The cobalt and nickel removal process using arsenic has low zinc dust consumption, a high-quality product solution and the ability to treat solutions with high impurity ...

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New Technologies for HCl Regeneration in Chloride Hydrometallurgy

An example of a chloride hydrometallurgical process . where HCl regeneration via calcium sulphate crystalliza-tion may be applied is presented in Figure 3. T he original .

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Comprehensive Review on Metallurgical Upgradation Processes …

Hydrometallurgical process for nickel sulfide ore was developed in 1970s, ... hydrogen chloride, calcium chloride, sodium chloride, magnesium chloride, and aluminum chloride, are widely used as chlorinating agents in the process of roasting. Raw mineral materials are mixed with chlorinating agents and roasted at 300 ~ 450 °C.

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An integrated and sustainable hydrometallurgical process for

This study developed an efficient and sustainable hydrometallurgical process for the enrichment of gold and silver and the stepwise separation of copper, zinc, and lead from sulfated roasted sand of waste printed circuit board smelting ash. ... The high-chloride-complex method was used to study the efficient conversion and separation of …

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Chloride hydrometallurgy

Chloride hydrometallurgy. Itydrometallurgy. 27: 285-316. In hydrometallurgy, chloride solutions may be used instead of sulfate solutions. Due to complexa- tion by chloride ions, most metals of interest in non-ferrous metallurgy are highly soluble in water. Potential series are different from the standard ones.

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Leaching and solvent extraction purification of zinc from …

An integrated hydrometallurgical process was used for the zinc leaching and purification from a zinc ore containing 9.75 wt% zinc. The zinc minerals in the ore were hemimorphite, willemite, and ...

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Hydrometallurgical process for the production of antimony

A hydrometallurgical process for pollution-free recovery of metallic antimony from stibnite and other antimony-containing materials by (a) reduction of ferric chloride by such materials to produce ferric chloride and antimony (III) chloride, (b) recovery of metallic antimony, preferably by electrolysis, (c) regeneration of the ferric chloride, and (d) purge of impurities.

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Chalcopyrite hydrometallurgy at atmospheric pressure: …

Abstract. Hydrometallurgical process developments for the extraction of copper from chalcopyrite tend to target complex concentrates, dirty concentrates …

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Hydrometallurgical recovery/recycling of platinum by the leaching …

Platinum Lake Technology Inc., Canada (Ryder and Dymock, 1990) developed a hydrometallurgical process for the recovery of precious metals from spent automotive catalysts following acid leaching in chloride medium. The small-scale process with 95% Pt and 98% Pd recovery was used for commercial applications.

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Chalcopyrite hydrometallurgy at atmospheric pressure: 1. Review …

The most commonly employed hydrometallurgical process for the oxidation of chalcopyrite and extraction of copper is the sulfuric acid–ferric sulfate system. It is the system of choice for bioleaching processes at atmospheric pressure, including stirred tank technologies for concentrates (Batty and Rorke, 2006) and heap or dump technologies ...

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A New Method for Production of Titanium Dioxide Pigment

A key step of the chloride process relies on high temperature carbo-chlorination of TiO{sub 2} bearing raw materials, hence producing large quantities of CO{sub 2}. The new method uses a chemical/metallurgical sequential extraction methodology to produce pigment grade TiO{sub 2} from high-TiO{sub 2} slag. The specific project …

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Hydrometallurgical recycling of valuable metals from spent

The reductant is a critical factor in the hydrometallurgical recycling of valuable metals from spent lithium-ion batteries (LIBs). There is limited information regarding the use of SnCl2 as a reductant with organic acid (maleic acid) for recovering valuable metals from spent Li-CoO2 material. In this study, the leaching efficiencies of Li and Co …

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Environmental Impact Assessment of …

The hydrometallurgical recycling is performed using an aqueous solvent-based leaching process, followed by a separation step (precipitation and solvent extraction) to recover valuable metals. Due to …

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Cuprous hydrometallurgy:

A new hydrometallurgical process for copper; Gibson, N. and Parker, A.J., 1976. Unpublished... E.J. Grimsey et al. Separation and purification of copper(I) chloride from a chlorination roast of Kambalda nickel matte using solutions of aqueous acetonitrile; F.P. Haver et al. Improvements in ferric chloride leaching of chalcopyrite concentrate

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Chloride hydrometallurgy

A number of processes have been proposed in chloride hydrometallurgy. So far, with one exception, only processes based on intermediate metallurgical products are still in operation. Recycling metallurgy and precious metals recovery will probably be …

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Hydrometallurgical Recovery of Zinc from By-Products and Waste

It should be noted that the hydrometallurgical process alone is not sufficient to completely remove chlorides from zinc ash due to insoluble chloride compounds, especially at high chlorine levels. Nirdosh et al. ( 1988 ) claimed that roasting the ash converted about 10–15% of the soluble chlorides to an insoluble matrix.

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Chloride hydrometallurgy

Abstract. In hydrometallurgy, chloride solutions may be used instead of sulfate solutions. Due to complexation by chloride ions, most metals of interest in non-ferrous metallurgy are highly soluble in water. Potential series are different from the standard ones. Electrochemical reactions are highly reversible.

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(PDF) Hydrometallurgical Process for Extraction of Metals from

Hydrometallurgical Process for Extraction of Metals from Electronic waste-part I: Material Characterization and Process Option Selection ... (sulphuric acid, chloride, cyanide) and eco-friendly ...

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Hydrometallurgical Process

The CESL process [56, 65] is based on chloride-accelerated oxidation pressure leaching with the control of the amount of the acid to ensure that copper is transferred to the basic …

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The cuprex metal extraction process: Recovering copper from

The Cuprex™ metal extraction process produces cathode-grade copper using a hydrometallurgical process based on chloride leaching of sulfide ore concentrates. The process incorporates several novel steps to overcome the major problems associated with earlier chloride-based processes, including mild leaching conditions using ferric …

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A literature review of titanium metallurgical processes

Because the chloride process has some advantages over the traditional sulphate process in cost and waste management, it has dominated the pigment industry in recent times. ... A hydrometallurgical process was developed for producing ultrafine titanium dioxide from aqueous titanium chloride solutions (Duyvesteyn et al., 2001b, ...

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