| Company | Endeavour Silver Corp. |
| Date | 2021 |
| Region | Not Specified |
| Commodities | Silver, Gold |
Executive Summary
The 2021 production data for the Bolañitos plant indicates a throughput of 418,514 tonnes of ore, grading 42 g/t silver and 2.02 g/t gold. Recoveries averaged 87% for silver and 90.7% for gold, resulting in 483,507 oz of silver and 24,730 oz of gold recovered. The plant operated at an average throughput of 1,163 tonnes per operating day, slightly exceeding the planned rate of 1,100 t/d, with only 4 days of maintenance downtime recorded.
The processing circuit has undergone upgrades since 2012, including the addition of a vibration screen and additional flotation cells. The current layout involves run-of-mine ore being crushed through a primary jaw crusher, secondary and tertiary cone crushers, and then ground in two ball mills. The ground pulp is processed through a flotation circuit consisting of rougher, scavenger, and cleaner cells, with the column flotation cell discontinued in 2020 due to arsenic recovery issues.
Final concentrate is dewatered using a thickener and filter press to 13-17% moisture before shipment. Target concentrate grades are maintained between 3 to 4 kg/t silver while keeping arsenic grades below 1.0%. The plant infrastructure supports the continuous operation of the Bolañitos project, demonstrating stable recovery performance in 2021 compared to previous years.
Processing Details
Website: https://edrsilver.com/portfolio/reserves-resources/reserves-resources/
Report Date: 2021
Region: Not Specified
Project Status:
Commodity: Silver, Gold
Throughput:
Mine Life:
Mine Type:
Ore type:
Technical report and processing history
The following archived source profiles have been consolidated here to preserve the project’s processing history and study context.
Bolañitos Project — 2020 Technical Report
Bolañitos Project — 2020 Technical Report
| Company | Endeavour Silver Corp. |
| Date | 2020 |
| Region | Mexico |
| Commodities | Silver, Gold |
| Status | Operating |
Executive Summary
The 2020 Technical Report details the operational performance of the Bolañitos plant, which processed 331,175 tonnes of ore grading 40 g/t silver and 2.02 g/t gold. The plant achieved recoveries of 84.8% for silver and 89.5% for gold, resulting in the production of 358,181 oz of silver and 19,249 oz of gold. These recoveries represented improvements of 5% for silver and 8% for gold compared to previous operations at higher throughput rates.
The processing plant is designed for a planned rate of 1,100 tonnes per day, with an average throughput of 1,078 tonnes per day recorded in 2020. This managed throughput rate was implemented to maximize recoveries, moving away from the previous operation of 1,600 tonnes per day. The facility includes significant infrastructure upgrades from 2012, including vibration screens, additional flotation cells, and a flocculent mixing system.
The recovery circuit begins with run-of-mine ore hauled by dump trucks and loaded onto a grizzly. The ore undergoes primary crushing via a jaw crusher, followed by secondary and tertiary cone crushing. The ground ore is then processed through a grinding circuit consisting of two ball mills before entering the flotation circuit. The final concentrate is thickened and filtered before shipment to traders.
Processing Profile
Website: https://edrsilver.com/news-media/news/endeavour-silver-completes-sale-of-bolanitos-mine-13329/
Report Date: 2020
Region: Mexico
Project Status: Operating
Commodity: Silver, Gold
Throughput:
Mine Life:
Mine Type:
Ore type:
