The San Jose project is an underground silver and gold mine located in the state of Oaxaca, Mexico.
The Engineering, Procurement and Construction Management (EPCM) performed by M3 includes the design of the grinding and flotation facilities, which are capable of processing 1,500 dry metric tons per day (tpd). The process plant is comprised of a mobile crushing circuit that yields ore sized to 9 millimeters in diameter, a grinding circuit that yields a 74 micron particle size, a flotation circuit with primary and cleaning stages that produce the silver concentrate, a 6-meter-diameter thickening system and a filtration system that delivers the final concentrate.
The process plant is complemented by a hydraulic refill plant that prepares tailings material in order to refill the underground mine.
The design of the ancillary buildings was also part of the M3 scope, which included a residual water treatment plant, a diesel station, a metallurgy laboratory, administrative buildings, bath and dressing rooms, storage and two workshops.