Selective Leaching of Arsenic from Copper Concentrates in Hypochlorite Medium

The selective leaching of arsenic using sodium hypochlorite was evaluated in order to reduce its concentration in a copper concentrate. The best conditions achieved in the synthetic concentrate were applied to the industrial concentrate. First, the individual behaviors of pure samples of enargite an...

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Bibliographic Details
Published in:Minerals (Basel) 2023-11, Vol.13 (11), p.1372
Main Authors: Hernández, Maria Cecilia, Benavente, Oscar, Roca, Antoni, Melo, Evelyn, Quezada, Víctor
Format: Article
Language:English
Subjects:
Analytical chemistry
Arsenic
Arsenic ions
Chalcopyrite
Chlorine
Cleaning
Cleaning process
Consumption
Copper
copper concentrate
Copper industry
Enargite
Ferric hydroxide
hypochlorite medium
Iodine
Iron
Leaching
Metallurgy
Microscopy
Reagents
Securities
selective leaching
Selectivity
Smelters
Sodium
Sodium hypochlorite
Solid phases
Sulfur
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Summary:The selective leaching of arsenic using sodium hypochlorite was evaluated in order to reduce its concentration in a copper concentrate. The best conditions achieved in the synthetic concentrate were applied to the industrial concentrate. First, the individual behaviors of pure samples of enargite and chalcopyrite were evaluated under a hypochlorite medium. The enargite reaction is significantly faster than chalcopyrite, allowing for greater selectivity to ClO− (0.1–0.3 M), pH 12–12.5; 20 to 40 °C, reaction time 0.5%As) into clean concentrates (
ISSN:2075-163X
2075-163X
DOI:10.3390/min13111372