Copper Leaching Using Mixed Explosive-and-Reagent Pretreatment of Ore Body

• Published in: Journal of mining science 2023-12, Vol.59 (6), p.1036-1044
• Main Authors: Rasskazova, A. V., Sekisov, A. G., Galim’yanov, A. A.
• Format: Article
• Language: English
• Subjects: Aluminum compounds; Bicarbonates; Carbonates; Chemical tests and reagents; Copper; Copper industry; Copper ores; Distilled water; Earth and Environmental Science; Earth Sciences; Geophysics/Geodesy; Geotechnical Engineering & Applied Earth Sciences; Hydroxides; Injection; Leaching; Mineral Dressing; Mineral Resources; Oxidation; Pregnant women; Pretreatment; Reagents; Recovery; Sodium; Sodium bicarbonate; Sodium hydroxide; Sodium hypochlorite
• ISSN: 1062-7391; 1573-8736
• DOI: 10.1134/S1062739123060169

The mixed explosive-and-reagent effect exerted on a cemented mineral mass, which simulated an ore body, by explosive charges arranged in reagent solutions was investigated. Pretreatment of the model material by explosive injection of different reagent systems leads to pre-oxidation of copper contained in the material, which stimulates its subsequent leaching. The maximal increment in copper recovery in pregnant solution reached 83% relative to the check value. For the pre-oxidation of copper contained in the model material, the mixed explosive-and-reagent treatment used: electrically activated solution sodium bicarbonate and peroxide, mixture of sodium hydroxide and peroxide, sodium hypochlorite and distilled water. The complexing agent in copper leaching was agent Jin Chan in standard and activated states. It is found that activation of solutions using electrochemically treated sodium bicarbonate before adding the complexing agent enables higher effective recovery of copper from model materials after mixed explosive-and-reagent injection preparation.