Mercedes Gold-Silver Mine — 2014 Technical Report
| Company | Yamana Gold Inc. |
| Mine | Mercedes Gold-Silver Mine |
| Date | 2014-05-31 |
| Commodities | Gold, Silver |
Executive Summary
The Mercedes Gold-Silver Mine, operated by Yamana Gold Inc., is detailed in this May 2014 NI 43-101 Technical Report. The processing facility utilizes conventional milling with Merrill Crowe recovery for precious metals. The plant design throughput is 1,500 tpd, with actual operations reaching 1,838 tpd in 2013. The mine commenced commercial production in November 2011 and is currently in the operating phase.
The recovery circuit includes crushing, grinding, gravity concentration, leaching, and Merrill Crowe precipitation. Ore is crushed via jaw and secondary/tertiary crushers, then ground in a ball mill. Gravity concentration recovers some gold and silver via bowl concentrators and shaking tables. The remaining slurry undergoes cyanide leaching in agitated tanks followed by carbon column circuits. Pregnant solution is processed through Merrill Crowe for zinc precipitation of gold and silver.
Production data from 2011 to 2014 shows consistent operation with gold recovery rates averaging around 94.4% and silver recovery rates around 32.7%. Reagent consumption includes cyanide, lime, and sodium metabisulphite for detoxification. The mine utilizes underground backfill for tailings management.
Processing Methods
- Crushing: Jaw, Secondary, Tertiary
- Milling: Ball Mill
- Gravity: Bowl Concentrator, Shaking Table
- Leaching: Agitated Tanks, Carbon Column
- Merrill Crowe: Zinc Precipitation
Reports
Website: https://en.wikipedia.org/wiki/Yamana_Gold
Report Date: 2014-05-31
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Commodity: Gold, Silver
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