Grid Metals gave an update on metallurgical testwork being done on samples from the company’s Mayville deposit, which saw growth in nickel-cobalt recovery from bulk concentrate.
Grid Metals (TSXV:GRDM,OTC Pink:MSMGF) gave an update on metallurgical testwork being done on samples from the company’s Mayville deposit, which saw growth in nickel-cobalt recovery from bulk concentrate.
Highlights from the press release are as follows:
A medium grade Mayville sample, selected by Grid Metals, grading 0.48 percent copper; 0.24 percent nickel, 0.02 percent cobalt was subjected to a laboratory scale flotation program of rougher and cleaner flotation. The best performing bulk concentrate achieved (Float 7), contained a copper/nickel grade of 23 percent with a cobalt grade of 0.40 percent. The mineralogical composition was 19 percent pentlandite, 47 percent chalcopyrite, 22 percent pyrrhotite and 13 percent non-sulphide gangue.
Recoveries to the bulk concentrate were nickel 69.8 percent, copper 90.1 percent, cobalt 51.7 percent and palladium 64.2 percent. The iron-S/Pn ratio was reduced from 11:1 in the feed to 1.34:1 in the concentrate, which is at a level considered acceptable for a bulk concentrate.
Preliminary precious metals analysis suggest precious metals (palladium – platinum – gold) are being upgraded and recovered.
The mineralogical character of the bulk concentrates produced from the sample are considered favourable for making marketable nickel and copper concentrates.