Mineral Processing Caravel Minerals 31 July 2023

Mineral Processing

The Caravel mineral processing plant is a conventional design suitable for treating porphyry-style copper ores. Operating examples are common throughout the Americas, including three operating plants in western Canada of similar scale and ore characteristics.

Caravel Minerals has undertaken significant analysis and independent review of the process flowsheet since the completion of the Project Pre-Feasibility Study, culminating in the delivery of a simplified and enhanced process flowsheet with no technical gaps.

The process flowsheet adopted as the base case for the Caravel Project Definitive Feasibility Study is:

  • Run-of-mine ore is crushed in a single stage using a primary gyratory crusher, producing material which is conveyed to a crushed ore stockpile prior to downstream processing.
  • A conventional SAG mill (with pebble crushing) and ball mill grinding circuit provides the final size reduction prior to beneficiation in the downstream copper-molybdenum flotation circuit.
  • The copper beneficiation circuit consists of rougher/scavenger flotation cells followed by rougher concentrate regrinding and cleaner flotation stages to produce a high-grade copper concentrate. Rougher and cleaner flotation tailings are thickened and pumped to a Tailings Management Facility (TMF) sized for the 25+ year mine life. Water reclaimed from the TMF is returned to the process water storage pond.
  • A Molybdenum Recovery Circuit (MRC) separates molybdenum from the copper concentrate using flotation to produce a high-grade molybdenum by-product. Both concentrates are thickened and filtered prior to transport by road to port.

The process flowsheet has a targeted recovery range of approximately 86-89% for copper and ~43% for molybdenum, with additional gold and silver credits reporting to the copper concentrate.