| Company | Alamos Gold |
| Mine | Mulatos |
| Date | 2023-03-27 |
| Region | Sonora, Mexico |
| Commodities | Gold, Silver |
| Status | Operating |
Executive Summary
The Mulatos Property Technical Report details the recovery methods for the Mulatos mine complex, operated by Alamos Gold. The facility utilizes a combination of heap leaching and high-grade gravity processing to recover gold and silver. The primary heap leach facility processes 18,500 tonnes per day (tpd) of ore, while the La Yaqui Grande heap leach facility adds another 10,000 tpd. A separate high-grade mill processes 1,000 tpd of sulphide ore using gravity concentration and intensive leaching.
The heap leach operations employ a four-stage crushing circuit to achieve a target size of 95 percent minus 3/8 inches, followed by agglomeration with lime and cement. Ore is stacked on lined pads and leached with low-concentration cyanide solution. Gold-bearing solution is recovered via a carbon-in-column circuit and processed through an adsorption-desorption-recovery (ADR) plant. The high-grade mill utilizes Inline Pressure Jigs and centrifugal concentrators to produce a concentrate, which is then intensively leached and treated via direct electrowinning to produce doré bars.
The report outlines the development history of the heap leach pads, including four phases of expansion, with a total capacity of approximately 70 million tonnes. Lining systems utilize composite HDPE liners with underdrain systems to protect groundwater. Solution management includes pregnant, barren, and storm event ponds to ensure environmental compliance and process continuity.
Website: https://www.alamosgold.com/operations/producing-mines/mulatos-mexico/default.aspx
Report Date: 2023-03-27
Region: Sonora, Mexico
Project Status: Operating
Commodity: Gold, Silver
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