Metallurgical testing that was carried out for Starfield Resources Inc. from 2001 to 2011 by Kingston Process Metallurgy, SGS Lakefield, and NeoFerric generated a predominantly hydrometallurgical flowsheet on which to assess the economic viability of the project at the scoping level. Recent tests were carried out by SGS for Canadian North Resources to include the recovery of PGMs.

  • Previous metallurgical tests were completed on the recovery of base metals (copper, nickel and cobalt) from massive sulfide ores only.

  • PGMs Comprehensive studies support potential processes with economic recoveries, stable tailings, and energy efficient recoveries for remote operations.

  • PGM recoveries were not included in the Preliminary Economic Assessment prepared by Roscoe Postle Associates Inc. for Starfield Resources Inc. (filed on Sedar on 2011).

  • Further testing is planned for the recovery of both PGM and base metals from various types of ores in the mineralized zones.

Previous metallurgical tests were completed on the recovery of base metals (copper, nickel and cobalt) from massive sulfide ores only.

Historical *

Canadian North Resources Inc​

​

Hydrometallurgical​ 
(Starfield 2012) (1)​

Hydrometallurgical 
(CNRI 2016) (2​)

Floatation (CNRI 2016-23)​

MS​

LSPGE​

Ni​

94%​

94%​

51%​

29%​

Cu​

97%​

99%​

95%​

78%​

Co​

89%​

91%​

89%​

48%​

Pd​

N/A​

95%​

76%​

60%​

Pt​

N/A​

97%​

60%​

70%​

Notes:   *All tests completed by SGS. (1)  Historical hydrometallurgical process for nickel, copper, and cobalt. (2) Recent hydrometallurgical methods plus final PGM-base metal element extraction from residue using Platsol process. MS- massive sulfides. LSPGE – low sulfide PGE enriched materials. NA – not available.​