Mineral Processing Circuit

The May 2012 NI 43-101 feasibility study for Sunridge Gold’s Debarwa project in Eritrea sizes a 35 t/h milling circuit for 270,000 t/a, plus 90,000 t/a of crushed direct shipping ore at about 16% copper.

This section of the NI 43-101 Technical Report details the recovery methods and processing plant design for The Granites underground mine operated by Tanami Operations in the Northern Territory. The plant, originally constructed in 1986, has undergone significant upgrades including the TEP (Tanami Expansion Project) commissioned in Q3 2017. The current configuration features a 3-stage crushing circuit feeding a primary and secondary ball mill circuit, followed by gravity concentration and Carbon-in-Leach (CIP) recovery. The plant is currently operating at feed rates between 300 to 350 tph, with a design capacity of 333 tph and achieved rates up to 390 tph.

This section of the technical report details the recovery methods and processing plant design for the Nichols Ranch Unit. The facility is licensed and designed to operate three major solution circuits: the recovery/extraction circuit, the elution circuit, and the yellowcake slurry production circuit. Currently, only the recovery/extraction circuit is constructed and operated on-site at the Nichols Ranch Unit processing facility. The plant utilizes an ion exchange system to extract uranium liberated underground from the circulating lixiviant flow.

The Updated Cerro Quema Pre-Feasibility Study outlines the technical basis for the development of the Cerro Quema gold and silver project located in Panama. The project utilizes standard open-pit mining methods to extract ore from the La Pava and Quema-Quemita pits, with an estimated mine life of six years based on a modeled reserve of 21.7 million tonnes. The processing facility is designed to handle a throughput of 10,000 tonnes per day, utilizing heap leaching for oxide and mixed ore types.

This technical report section outlines the recovery methods and processing plant facilities at the Irokinda mine. The plant operates year-round with a main throughput of approximately 230,000 t/y and a third processing line of 40,000 t/y. The metallurgical process utilizes gravity and flotation circuits to produce a gravity concentrate for smelting and a flotation concentrate for off-site CIP treatment at the Zun-Holba mine. The facility includes crushing, grinding, gravity concentration, flotation, and tailings storage. A site inspection in May 2012 confirmed the plant was well maintained.