An Alternative Process for Leaching Chalcopyrite Concentrate in Nitrate-Acid-Seawater Media with Oxidant Recovery
| Autor: | María E. Taboada, César I. Castellón, Pía Hernández, Lilian Velásquez-Yévenes |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
lcsh:TN1-997
inorganic chemicals 0211 other engineering and technologies 02 engineering and technology 010501 environmental sciences 01 natural sciences complex mixtures chemistry.chemical_compound Copper extraction techniques Nitrate Sodium nitrate nitrate General Materials Science Sodium nitrite lcsh:Mining engineering. Metallurgy 021102 mining & metallurgy 0105 earth and related environmental sciences seawater Metals and Alloys technology industry and agriculture Sulfuric acid equipment and supplies chalcopyrite leaching chemistry Seawater Leaching (metallurgy) gas scrubbing Data scrubbing Nuclear chemistry |
| Zdroj: | Metals Volume 10 Issue 4 Metals, Vol 10, Iss 518, p 518 (2020) |
| ISSN: | 2075-4701 |
| DOI: | 10.3390/met10040518 |
| Popis: | An alternative copper concentrate leaching process using sodium nitrate and sulfuric acid diluted in seawater followed by gas scrubbing to recover the sodium nitrate has been evaluated. The work involved leaching test carried out under various condition by varying temperature, leaching time, particle size, and concentrations of NaNO3 and H2SO4. The amount of copper extracted from the chalcopyrite concentrate leached with seawater, 0.5 M of H2SO4 and 0.5 M of NaNO3 increased from 78% at room temperature to 91% at 45 ° C in 96 h and 46 h of leaching, respectively. Gas scrubbing with the alkaline solution of NaOH was explored to recover part of the sodium nitrate. The dissolved salts were recovered by evaporation as sodium nitrate and sodium nitrite crystals. |
| Databáze: | OpenAIRE |
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