Mineral Processing Circuit

The Cariboo Gold Project Feasibility Study details a processing plant design with a capacity of 4,900 tonnes per day (tpd) located in Wells. The mine utilizes an underground mining method where ore is crushed underground and conveyed to the surface. The flowsheet integrates ore sorting, grinding, gravity concentration, and flotation to recover gold. All mill tailings are returned underground as paste backfill, while the flotation concentrate is trucked offsite for sale.

The Brewery Creek Project Preliminary Economic Assessment NI 43-101 Technical Report outlines a heap leach operation targeting gold and silver recovery. The project is based on a mineral resource of 18.7 million tonnes with an estimated mine life of 7.9 years at a processing rate of 9,000 tonnes per day. Mining will utilize standard open pit methods, and the process design involves reusing an existing heap leach pad and solution collection system.

The Gibellini Vanadium Project is a Preliminary Economic Assessment (PEA) located in Eureka County, Nevada. The project focuses on the extraction of vanadium from open pit mines (Gibellini and Louie Hill) using a heap leach process. The design utilizes standard proven equipment adapted for vanadium recovery, which is a novel application compared to traditional copper heap leaching.

This technical report outlines the process design for the San Albino Project, developed by P&E Mining Consultants Inc. The proposed processing plant is designed for a throughput of 250 tonnes per day, utilizing a combination of gravity recovery and Carbon-in-Leach (CIL) technology for gold extraction. The circuit includes primary, secondary, and tertiary crushing stages followed by ball milling to achieve a P80 of 70 microns.

This NI 43-101 Technical Report details the recovery methods for the Agua Rica Integrated Project, which aims to utilize the existing Alumbrera processing facilities to treat ore from the new Agua Rica mine. The Alumbrera operation was previously shut down in October 2018 after depleting its open pit mineral reserves. The project involves crushing Agua Rica ore at the new mine site and conveying it 35 km west to the existing Alumbrera mill feed stockpile. The nominal Life of Mine (LOM) for the project is 28 years, with a planned throughput increase from 90,000 tpd to 110,000 tpd (40 Mtpa).

This report details the recovery methods and processing operations for Forbes Coal’s Dundee Operations in KwaZulu-Natal, South Africa. The operations consist of two coal processing plants, the Coalfields Plant and the Magdalena Plant, alongside a Calcine Plant for anthracite treatment. Site visits were conducted in October 2012, updating performance data from a 2011 report.

This section of the NI 43-101 Technical Report details the recovery methods and pilot plant results for the Invicta Gold Project. Based on locked-cycle test results, metallurgical balances were prepared for two tests conducted in a semi-continuous pilot plant using several tonnes of representative samples. The pilot plant successfully produced two distinct concentrates: a copper concentrate and a lead concentrate. The overall recoveries and grades for the saleable metals in these concentrates were summarized in the report tables, providing a baseline for the proposed processing flow sheet.