OneTunnel | Iron Removal in the Skorpion Process

As the first mine-to-metal zinc operation utilising atmospheric leaching, solvent extraction and electrowinning, Skorpion Zinc faces unique challenges and opportunities. One of these challenges is found in the solvent extraction circuit, in which di-ethylhexyl phosphoric acid (D2EHPA) is used as the organic extractant. Although D2EHPA is an excellent extractant for …

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WATER REDUCTION AT SKORPION ZINC AND THE …

Figure 2.1: Skorpion Zinc Process Flow 2.1 Leach and Neutralisation circuit During leaching, silicates are leached to primarily form monomeric silicic acid ... The conditions selected for leaching and neutralisation for Skorpion ore are well within the optimum operating window described above and gelatinous silica formation is

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SKORPION ZINC: LESSONS LEARNT IN THE OPERATION …

The first-time application of a purely hydrometallurgical route for the exploitation of an oxide ore to produce special high-grade zinc was realised at Skorpion Zinc using the Modified ZincexTM …

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Emerging Applications of ZINCEX and PLACID Technologies

Skorpion mine (Namibia) based on MZP during 1997 and 1998. One of the most important stages of the feasibility study was the confirmation of MZP through piloting of the core sections of the process—leaching, solvent extrac-tion, and electrowinning—in a pilot plant located at TR's research and develop-ment center in Madrid, Spain.

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Solvent Extraction in Zinc Production from a Primary Source: The

The Skorpion Zinc refinery, Namibia, was successfully commissioned during 2003, and is approaching full production of 150 000 t/a of special high grade zinc (> 99.995 % Zn). The orebody presents unique challenges, containing fluorides and

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Skorpion zinc solvent extraction: the upset conditions

Atmospheric acid leaching is utilized to yield a PLS that is forwarded to SX for further processing. The SX circuit is based on a modification of the ZincexTM Process originally designed by Tecnicas Reunidas for secondary zinc sources2. The selection of SX as a purification step in the Skorpion process was necessitated by a number of factors ...

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Investigation of secondary zinc oxides as an alternative feed to …

ENGLISH ABSTRACT: Skorpion Zinc is investigating the possibility of using secondary zinc oxides as an alternative feed to supplement the zinc oxide ore feed and to extend the life of mine. Part 1 of this communication provides the technical background on the leaching performance at the typical Skorpion Zinc operating conditions. This study reports on the process modelling …

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Investigation of secondary zinc oxides as an alternative feed …

as an alternative feed to the Skorpion Zinc process: Part 1 — leaching alternative zinc oxides by C. Lottering*† and C. Dorfling† 75+181 Skorpion Zinc processes zinc oxide ore using a sulphuric acid leaching, solvent extraction, and electrowinning process to produce Special High Grade zinc. The company investigated the possibility of ...

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SOLVENT EXTRACTION IN ZINC PRODUCTION FROM

departure from classical zinc refineries in the use of atmospheric leaching of the high-silica oxide ore, followed by solution purification by solvent extraction, and the electrowinning of ... Simplified process flowsheet of the Skorpion Zinc refinery [4]. Técnicas Reunidas were responsible for the provision of the SX technology, which is ...

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Investigation of secondary zinc oxides as an alternative feed to …

The Skorpion Zinc process consists of three major steps, namely atmospheric leaching, solvent extraction, and electrowinning. Of primary interest for the first part of the study is the …

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Skorpion Zinc: optimization and J innovation

The Skorpion process was developed to treat a complex non-sulfide oxide orebody using atmospheric leaching followed by solvent extraction (SX) and electrowinning of zinc1,2,3. Sauconite is the largest contributor to the zinc grade, with lesser amounts of zinc hydroxides.

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SKORPION ZINC: LESSONS LEARNT IN THE OPERATION …

SKORPION ZINC: LESSONS LEARNT IN THE OPERATION OF THE MODIFED ZINCEX TM SOLVENT-EXTRACTION PROCESS Carlota David, Stefan Engelbrecht Skorpion Zinc, Rosh Pinah, Namibia Gustavo Díaz Nogueira, Francisco Sánchez, Ana Belén Mejias, Técnicas Reunidas, Madrid, Spain This paper was published in the event ISEC 2011.

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Simplified process flowsheet for the recovery of zinc at Skorpion …

Thus, various types of hydrometallurgical processes have been developed, i.e., the acidic leaching process, which has been widely applied with good recoveries [19] [20] [21]. However, it is ...

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Leaching: Process, Types, Methods, Advantages, Disadvantages …

Disadvantages of the leaching process. The leaching process results in leftover liquid waste that is extremely acidic in composition. This process causes soil acidification, which has several negative impacts. If improper procedures are taken, water could get contaminated. It can be a very slow procedure, consuming extra time.

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SKORPION ZINC: OPTIMISATION AND INNOVATION

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 of impurity transfer was attributed to crud runs in the solvent extraction circuit.

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[PDF] Investigation of secondary zinc oxides as an alternative …

@article{Lottering2018InvestigationOS, title={Investigation of secondary zinc oxides as an alternative feed to the Skorpion Zinc process : Part 1 — leaching alternative zinc oxides}, author={C. Lottering and Christie Dorfling}, journal={Journal of The South African Institute of Mining and Metallurgy}, year={2018}, volume={118}, pages={695-704 ...

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Zinc and Lead Solvent Extraction and Electrowinning

The Skorpion process comprises three processing steps: direct atmospheric leaching in H 2 SO 4, Zn SX, and EW, to produce special, high-grade Zn (Abkhoshk et al. 2014). After the direct atmospheric leaching, the neutralized leach solution (PLS) is sent to the SX circuit.

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Review of the hydrometallurgical processing of non-sulfide zinc ores

The Skorpion process has three processing steps, i.e., direct atmospheric leaching in sulfuric acid, zinc solvent extraction, and electrowinning, to produce special, high-grade zinc. Fig. 3 shows Skorpion's simplified flowsheet of the process. The leaching process is conducted in a series of agitated tanks at about 50 °C. The final pH is ...

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Investigation of secondary zinc oxides as an …

Skorpion Zinc processes zinc oxide ore using a sulphuric acid leaching, solvent extraction, and electrowinning process to produce Special High Grade zinc.

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Investigation of secondary zinc oxides as an alternative feed to …

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

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leaching process for chromite saudi arabia

skorpion leaching process and its conditions Mobile. Heap leaching is an industrial mining process to extract precious metals,copper,uranium.skorpion leaching process and its conditions.skorpion zinc webmail for sale Pakistan Skorpion Leaching Process And Its Conditions,Process.chromite mining operation flow sheet bondhumahal.inchromite ore ...

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2013 The Modified Zincex Process

The Modified ZINCEX TM Process is an advantageous smelting hydrometallurgical process licensed by Técnicas Reunidas to produce ultra-pure Zinc cathodes and enable the recovery …

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2013 The Modified Zincex Process

Figure 3: Main process stages of the Modified ZINCEX TM Process Leaching is carried out at proper conditions to produce a Pregnant Liquor Solution (PLS) of very ... suitability of the electrolyte for any commercial Electrowinning process. Figure 5: Schematic of the Skorpion Zinc SX flowsheet. Source Skorpion Zinc and TR; ISEC 2011.

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Evaluation of processing options for the treatment of zinc …

considerations for a suitable process for Skorpion Zinc are: A process with more favorable economics will be preferred. This implies low operating and capital cost ... The leaching process takes place in a sulphate medium at low pH. Zinc sulphide is leached by ferric as an oxidant. The ferric is regenerated by oxygen and bacteria.

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Skorpion Zinc: Optimisation and Innovation | Request PDF

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

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Evaluation of processing options for the treatment of …

It is concluded that ferric leaching of sphalerite in a sulphate medium under atmospheric or pressure leach conditions are suitable processes for Skorpion Zinc.

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Investigation of secondary zinc oxides as an alternative feed to …

Part 1 of this communication provides the technical background on the leaching performance at the typical Skorpion Zinc operating conditions. This study reports on the process modelling and economic analysis that were performed to determine appropriate feed blending strategies for electric arc furnace (EAF) dust, zinc dross, and zinc fume dust ...

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Skorpion Zinc: optimization and J innovation

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

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[PDF] Investigation of secondary zinc oxides as an alternative …

DOI: 10.17159/2411-9717/2018/V118N7A5 Corpus ID: 117367797; Investigation of secondary zinc oxides as an alternative feed to the Skorpion Zinc process : Part 2 ...

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Investigation of secondary zinc oxides as an alternative feed to …

Skorpion Zinc leaching conditions. The Skorpion Zinc process consists of three major steps, namely atmospheric leaching, solvent extraction, and electrowinning. Of primary interest for the first part of the study is the atmospheric leaching stage, which treats ore that has been crushed and milled to 80% passing 180 μm. The leaching section ...

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