Optimization Process of the Refractory Gold Ore Extraction by Hypochlorite Oxidative Leaching
| Autor: | Suhaina Ismail, Mohammad Rezaei Ardani, Norlia Baharun, Wan Nur Syafiqah Anuar, Shaik Abdul Rahman |
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| Rok vydání: | 2021 |
| Předmět: |
Mechanical Engineering
Extraction (chemistry) Metals and Alloys Hypochlorite General Chemistry Geotechnical Engineering and Engineering Geology Chloride Metal chemistry.chemical_compound chemistry Refractory Control and Systems Engineering visual_art Oxidizing agent Materials Chemistry visual_art.visual_art_medium medicine Leaching (metallurgy) Gold extraction Nuclear chemistry medicine.drug |
| Zdroj: | Mining, Metallurgy & Exploration. 38:1191-1201 |
| ISSN: | 2524-3470 2524-3462 |
| DOI: | 10.1007/s42461-020-00376-6 |
| Popis: | Hypochlorite leaching system is a strong oxidizing solution for metal sulfides, which are naturally associated with gold extraction. This study evaluated the hypochlorite leaching of refractory gold ore by using the response surface method–central composite design (RSM-CCD) as a statistical approach in determining the optimum condition of gold extraction from refractory gold ore. The studied parameters for the gold recovery were pH (4 to 6), concentrations of Ca(OCl)2 (0.5 to 1.5 M) and NaCl (2.5 to 3.5 M) in the solution. It was found that the maximum gold extraction of 82.46% (13.85 g/t) was achieved at a pH of 4.0 with NaCl and Ca(OCl)2 concentrations of 2.93 M and 1.08 M, respectively. The statistical analysis also revealed that the amount of gold recovery in chloride solution was significantly depended on pH as the main factor, followed by concentrations of Ca(OCl)2 and NaCl. |
| Databáze: | OpenAIRE |
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