Revamping and upgraiding of the existing Skorpion Zinc (SZ) plant, increasing its capacity from the current 150,000 tpa to 200,000 tpa of Zinc SHG (purity 99.995%) based on calcine and ore from Skorpion. The scenario in which the current production of 150,000 tpa is maintained, but limiting the raw material to calcine has

Vedanta Resources underway with Gamsberg development

Jan 04,  · The balance will be used to convert the refinery at Skorpion Zinc in Rosh Pinah, Namibia, enabling it to refine zinc sulphide concentrates from the Gamsberg mine into Special High Grade zinc metal. This will entail the installation of a 150 000 tpa integrated roaster with acid plant and calcine leach section at the existing Skorpion Zinc refinery.

Skorpion Zinc: Optimisation and Innovation | Request PDF

Abstract The Skorpion process comprises three processing steps, atmospheric leaching in sulphuric acid, zinc solvent extraction and electrowinning to produce special high grade zinc. The major mode

Pressure leaching of synthetic zinc silicate in sulfuric acid

Jul 01, · The leaching percentage of zinc was 99% and the dissolution of silica and iron was as low as 0.30% and 0.10%. Gnoinski (2007) introduced the Skorpion process, which comprises three processing steps — atmospheric leaching in sulfuric acid, zinc solvent extraction and electrowinning to produce special high grade zinc.

Solvent extraction in the primary and secondary recovery of zinc

Skorpion project Anglo American’s Skorpion project will be the first commercial application of zinc SX for primary zinc processing, involving a capital investment of US$ 454 million to develop the mine and refinery near Rosh Pinah in southern Namibia [11]. A simplified flowsheet of the proposed process is given in Figure 2 [12].

Evaluation of processing options for the treatment of zinc

sources are not close to Skorpion Zinc and trucking of a low-grade whole ore will not be viable due to the high transportation cost. This option is therefore eliminated. The Dynatec pressure leach process involves the ferric leach of zinc sulphide at 150°C in a sulphate media. Ferric is regenerated by pure oxygen injected into the autoclave. It is a

Skorpion Zinc Refinery Sulphide Conversion Amendment to EIA

Skorpion Zinc (Pty) Ltd Skorpion Zinc Sulphide Conversion 14-756 19 August Page 1 1 INTRODUCTION 1.1 Background Walmsely Environmental Consultants completed an Environmental Impact Assessment (EIA) study for the Skorpion Zinc mine in 1998, defining the sensitive areas on the site and

Major Mines & Projects | Skorpion Mine

Within the footwall of the Skorpion non-sulphide zinc ore body disseminated to semi-massive primary pyrite sphalerite mineralisation has been intersected at a depth of 250 m and 300 m, respectively, which features a 25-m-wide zone grading 0.6 % Zn and 0.35 % Cu.

production proces recycling of construction debris

Construction and Demolition Debris: MaterialSpecific Data . Oct 28, Construction and Demolition (CD) debris is a type of waste that is not included in municipal solid waste (MSW) Materials included in the CD debris generation estimates are steel, products, drywall and plaster, brick and clay tile, asphalt shingles, concrete, and asphalt concrete

Hydrometallurgical separation of zinc and copper from

One route consisted of acid leaching in the presence of an oxidizing agent, followed by copper electrowinning and cementation of the remaining copper with zinc powder. The other route comprised a weak acid leaching followed by alkaline leaching with a mixture of (NH4) 2 CO 3 and NHOH, reaching over 90% of zinc and copper recovery.

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PDF Development of a viable process for the T recovery of zinc

Introduction The whole-ore-leaching concept applied at Skorpion Zinc in Namibia relies on the economical leaching of zinc minerals with sulphuric acid solutions under atmospheric conditions. Economic viability is premised on the selective mining of the zinc oxide ore from a limestone pit shell.

PDF Skorpion Zinc Refinery Sulphide Conversion Amendment to

Skorpion Zinc (Pty) Ltd plans to treat zinc sulphide concentrates in parallel to the current oxide stream from to and then only treat zinc sulphide concentrate until approximately 2032.

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Zinc is known to support immune function, and research shows that zinc helps control infections by gently tapping the brakes on the immune response in a way that prevents out-ofcontrol

PDF Skorpion Zinc: Mine-to-metal zinc production

Skorpion Zinc Oxide/silicate: Zn 10 -40% Si 26% Fe 2 -3% Some Cland F • First application of Zn SX to primary processing • Silicate leaching technology • First metal May 2003 • 150 000 t/a SHG zinc (>99.995% purity)

Skorpion Leaching Process

leaching of zinc oxide at skorpion. Openpit zinc Processing: Acid leaching and SX/EW; SKORPION ZINC SOLVENT EXTRACTION THE UPSET CONDITIONS J.M which is necessary for the leaching process. Read more


The Skorpion Zinc operation in Namibia is the world’s largest mine-to-metal zinc operation that produces 150 000 tpa of special high-grade zinc. An SX step enables the dilute leaching of the silicate ore (previously considered untreatable) and upgrading into an electrolyte suitable for zinc EW. This operation

Investigation of secondary zinc oxides as an alternative feed

With the current Skorpion Zinc operating conditions of 50°C and pH 1.8, zinc dissolution from the EAF dust, zinc dross, and zinc fume was 93, 96.9, and 98.5 %, respectively. The rate of zinc leaching from dross and from zinc fume decreased as the pH was increased to 1.5 and 1.8, respectively.

Skorpion zinc: Optimization and innovation | Request PDF

The Skorpion process comprises three processing steps-atmospheric leaching in sulfuric acid, zinc solvent extraction and electrowinning to produce special high grade zinc.

Leaching of Heavy Metals from Personal Computer Components

Nov 11,  · The European leaching test was performed at the natural pH of the materials. Results showed that the masses of some metals leached during the TCLP were up to two orders of magnitude greater than the corresponding masses measured by the European leaching test. Lead and zinc were the dominant metals leached from all four PCCs.