PROJECTS
Geo-Metallurgical Solubility Model Review of the Gabriela Mistral Plant
The Gabriela Mistral deposit, located in the Antofagasta Region, commune of Sierra Gorda, is 120 kilometres southwest of Calama at an altitude of 2,660 meters. With 620 million tons of oxidized ore with an average copper grade of 0.41%, production began in 2008 through Minera Gaby S.A, a subsidiary of Codelco. In December 2012, it became the Gabriela Mistral Division. Exploitation is carried out using an open pit method, using autonomous trucks. The production process involves crushing, acidifying drum curing, dynamic heap leaching, waste disposal, solvent extraction (SX) and electrowinning (EW).
- PMC revised the Cu extraction and acid consumption model based on sequential CuS, CuCN and insoluble Cu analyses.
- For each geo-metallurgical unit, multiple regression models were developed that correlated Cu recovery and acid consumption based on the following equations:
- Recovery CuT = a+ bx(CuS/CuT) + cx(CuCN/CuT)
- Acid consumption = a+ bx(CuS/CuT) + cx(CuCN/CuT
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