skorpion leaching process


Skorpion zinc solvent extraction: The upset conditions

Nov 01, 2009· Skorpion Zinc is located 25 km north-west of the small settlement of Rosh Pinah in southern Namibia. Commissioned in early 2003, Skorpion Zinc became the first mine-to-metal operation to commercially apply a purely hydrometallurgical process route to exploit a zinc oxide orebody.

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Skorpion on track for full production

Nov 26, 2004· As the process is an acid-leach process, it is essential to avoid acid-consuming limestone reporting to the plant. "When we drill to blast on a 4 …

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Evaluation of processing options for the treatment of zinc ...

process at Skorpion will therefore increase the business risk. Having the primary business linked to another market, especially a by-product market, will be a disadvantage. The pyrometallurgical and RLE processes will therefore be discarded as options for Skorpion Zinc. There are two options when the percolation leach process is considered.

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University of Cape Town

The leach kinetics of zinc sulphides is vastly slower than oxides, preventing the processing of zinc sulphides using the existing process, under current conditions. The challenge for Skorpion Zinc is to identify a suitable zinc sulphide treatment process that can be integrated with the existing plant.

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WATER REDUCTION AT SKORPION ZINC AND THE IMPACT …

Figure 2.1: Skorpion Zinc Process Flow 2.1 Leach and Neutralisation circuit During leaching, silicates are leached to primarily form monomeric silicic acid (Si(OH)4), which is polymerised partially to form colloidal silica. Colloidal silica can combine to form either open structures, within which water is …

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Leaching Process - Chemical Engineering World

Jun 29, 2020· Leaching Process. Leaching Process:-Leaching is a mass transfer operation in which we have a solid material which either contains components which are valuable to us or components which are considered an impurity of the solid, no matter what the case, such components are called solute.We take a liquid which is called a solvent and contact it intimately with the solid in order to …

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Leaching process of phosphorus and iron from steelmaking ...

Sep 13, 2021· The leaching kinetics of phosphorus follows the unreacted shrinking core model. Diffusion through product layer is the rate-limiting step of the leaching process, and the corresponding apparent activation energy is determined to be 3.32 kJ/mol. Finally, a …

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Leaching Solution - an overview | ScienceDirect Topics

Minemet Recherche operated the leaching process with CuCl 2 to solve several problems, identified in the CYMET and CLEAR processes [30]. Leaching was realised in a counterflow system in two stages at approximately 100 °C for 3 h in each stage. The solution contains 50 g/l of Cu 2 + and 250 g/l NaCl. The yield of copper was higher than 98% and ...

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Review of the hydrometallurgical processing of non-sulfide ...

Oct 01, 2014· 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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SKORPION ZINC: OPTIMISATION AND INNOVATION

The Skorpion process was developed to treat a complex non-sulphide oxide ore body using atmospheric leaching followed by solvent extraction and electrowinning of zinc (1,2,3) . Sauconite is the largest contributor to the zinc grade with lesser amounts of zinc hydroxides. The gangue minerals are mainly quartz, K-feldspar and muscovite mica. The

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Eluviation vs. Illuviation - What's the difference? | Ask ...

Dec 23, 2018· Eluviation vs. Illuviation. Eluviation noun. The sideways or downward movement of dissolved or suspended material within soil caused by rainfall. Illuviation noun. (geology) The accumulation of suspended material and soluble compounds leached from an overlying stratum. Eluviation noun. Creation of geological deposits (eluvial deposits) by in ...

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Basics of Leaching - Separation Technology - Articles ...

Nov 08, 2010· Figure 3: Finding Fsol at the End of the Leaching Process: Point T is found by: Since the material balance dictates that Oflow o, T, and Fsol o are in a straight line, and Oflow, T, and Fsol 4 be in a straight line, we can find Fsol 4 graphically with an accurate graph. Notice that the experimental data ultimately determines the final quality ...

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Skorpion Zinc Mine - Mining Technology | Mining News and ...

Dec 08, 2010· Skorpion is the first commercial application of zinc SX-EW for processing primary leach liquor. Crushed ore is homogenised and wet milled. The refinery comprises basic zinc sulphate production, SX, EW and melting / casting facilities. Sulphuric acid leaching takes place in agitated tanks at atmospheric pressure and elevated temperature.

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Leaching (metallurgy) - Wikipedia

Leaching is a process widely used in extractive metallurgy where ore is treated with chemicals to convert the valuable metals within into soluble salts while the impurity remains insoluble. These can then be washed out and processed to give the pure metal; the materials left over are commonly known as tailings.Compared to pyrometallurgy leaching is easier to perform, requires less energy and ...

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SKORPION ZINC SOLVENT EXTRACTION: THE UPSET J.M ...

Skorpion Zinc is located 25km North West of the small settlement of Rosh Pinah in southern Namibia. Commissioned in early 2003, Skorpion Zinc became the first mine-to- metal operation to commercially apply a purely hydrometallurgical process route to exploit a zinc oxide ore body. The novel technology, known as The Modified ZincexTM

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SKORPION ZINC: LESSONS LEARNT IN THE OPERATION OF …

produce special high-grade zinc was realised at Skorpion Zinc using the Modified Zincex TM technology. The essential process comprises leaching, solvent extraction (SX), and electrowinning. The main functions of SX are to provide a barrier against impurities and to upgrade the pregnant leach

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Solvent extraction in hydrometallurgy

Skorpion flowsheets are discussed. Solvent extraction (SX) is a process by which closely related elements or com- ... process routes. Bacterial leaching or pres-sure leaching can be considered for the hydrometallurgical recovery of copper from sulfide ores. Stirred-tank bacterial leaching

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Separation of silicon and iron in copper slag by ...

Sep 07, 2020· Approximately 2.0–3.0 t of copper slag (CS) containing 35%–45% iron is generated for every ton of copper produced during the pyrometallurgical process from copper concentrate. Therefore, the recovery of iron from CS utilizes a valuable metal and alleviates the environmental stress caused by stockpile. In this paper, a new method has been developed to realize the enrichment of iron in CS ...

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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. The major mode of ...

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(PDF) 2011 Reducing water consumption at Skorpion Zinc ...

The main zinc reactions the leaching step and any metals that co-extract with zinc are in the leaching step were formulated as follows: Figure 1—Simplified process flow sheet for Skorpion Zinc 438 JUNE 2011 VOLUME 111 The Journal of The Southern African Institute of Mining and Metallurgy Reducing water consumption at Skorpion Zinc J The water ...

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Leaching (chemistry) - Wikipedia

Leaching is the process of a solute becoming detached or extracted from its carrier substance by way of a solvent.. Leaching is a naturally occurring process which scientists have adapted for a variety of applications with a variety of methods. Specific extraction methods depend on the soluble characteristics relative to the sorbent material such as concentration, distribution, nature, and size.

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2013 The Modified Zincex Process - Técnicas Reunidas

process, provided that proper maintenance and housekeeping policies are applied by operators. Another benefit is the longer life of the electrodes. Tecnicas Reunidas ensures the 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. 2.-

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[PDF] Disposal of Belt Filtered Tailings – Skorpion Zinc ...

Skorpion Zinc Mine comprises an opencast mine and refinery and is located in the south west of Namibia in a very arid area, with desert sand dunes to the west and rugged mountains to the east. The refinery began operating in mid 2003 treating an oxide orebody to recover zinc by means of a leaching, solvent extraction and electro-winning process. The tailings produced from the leaching process ...

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