| Company | Equinox Gold Corp. |
| Date | 2020 |
| Region | Brazil |
| Commodities | Gold |
| Throughput | 7,000 tpd |
Executive Summary
This technical report details the recovery methods for the Riacho dos Machados Gold Mine operated by Equinox Gold Corp. The processing plant is designed to handle a throughput of 7,000 tonnes per day (tpd), with potential expansion to 9,000 tpd pending power line completion and equipment upgrades. The plant utilizes a three-stage crushing circuit followed by ball mill grinding and Carbon-in-Leach (CIL) processing.
The crushing circuit achieves 80% availability and includes a primary jaw crusher, secondary Metso HP-500 cone crusher, and tertiary crushers operating in closed circuit. Ore is ground in a 6.7m diameter by 11.1m long ball mill before being thickened and fed into the CIL circuit. The CIL circuit consists of two leach tanks and six CIL tanks, utilizing counter-current flow of activated carbon.
Gold recovery involves an Adsorption, Desorption, and Recovery (ADR) plant, followed by electrowinning and smelting to produce gold doré. Tailings undergo sulphur dioxide-air cyanide detoxification to meet discharge criteria. The report outlines the flowsheet and operational parameters for the plant as of March 2020.
Website: https://www.equinoxgold.com/news/equinox-gold-reports-updated-mineral-reserves-and-resources-for-mesquite-fazenda-and-rdm-gold-mines/
Report Date: 2020
Region: Brazil
Project Status:
Commodity: Gold
Throughput: 7,000 tpd
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.
Riacho dos Machados Gold Mine — 2018 Technical Report
Riacho dos Machados Gold Mine — 2018 Technical Report
| Company | Leagold Mining Corporation |
| Date | 2018-11-20 |
| Region | Brazil |
| Commodities | Gold |
| Throughput | 7,000 tpd |
| Status | Development |
Executive Summary
This technical report details the processing plant design for the Riacho dos Machados Gold Mine, operated by Leagold Mining Corporation. The plant is designed to process 7,000 tonnes per day (tpd), equivalent to 2.55 million tonnes per annum (Mtpa). There is potential for expansion to 9,000 tpd pending the completion of a power line and installation of additional crushing and milling equipment. The power line was under construction at the time of the report, with completion anticipated by the end of 2018.
The processing circuit consists of a three-stage crushing plant, ball mill grinding, and a Carbon-in-Leach (CIL) circuit. The crushing circuit includes a primary jaw crusher, a secondary Metso HP-500 cone crusher, and tertiary crushers operating in a closed circuit. The ore is ground in a 6.7 m diameter by 11.1 m long ball mill with twin 4,500 kW motors. The ground slurry is thickened and fed to the CIL circuit for gold recovery.
Gold recovery involves a CIL circuit with two leach tanks and six CIL tanks, followed by an Adsorption, Desorption, and Recovery (ADR) plant. The ADR process includes acid washing, stripping in a vertical pressure strip vessel, and electrowinning to plate gold onto cathodes. The resulting sludge is dried and smelted to produce gold doré. Tailings undergo sulphur dioxide-air cyanide detoxification to meet discharge criteria before being pumped to the tailings storage facility (TSF).
Reports
Website: https://www.mining.com/leagold-closing-brazil-mine-two-months-due-drought/
Report Date: 2018-11-20
Region: Brazil
Project Status: Development
Commodity: Gold
Throughput: 7,000 tpd
Mine Life:
Mine Type:
Ore type:
