Galileo Mining Ltd Announces Metallurgical Test Work Results from Callisto
recoveries presented. Drill hole information for NRCD337 is presented in Appendix 1 and 2 with JORC details in Appendix 3. No significant levels of deleterious elements were measured in the rougher concentrate. Sighter flotation tests were conducted at a conventional grind of p80 = 75 microns in Perth tap water using a standard sulphide flotation reagent suite of copper sulphate activator (75 g/t), A3894 frother (55 g/t), and SIBX collector (19 g/t). The tests were done using pulps of 35% solids at pH 8.7 for 12 minutes. This sighter test has produced excellent recoveries of the base metals and the PGE (Platinum Group Elements). The correlation of assayed head values and the calculated head values is very high which provides further confidence that the mineralisation responded very well to conventional beneficiation by flotation.Samples of un-beneficiated ore have been sent for detailed mineralogical examination using QEMSCAN to understand the liberation sizes and association of PGE with sulphide minerals and host rock. Samples of
flotation products have been sent for XRD analysis to identify the mineral species reporting to the various fractions. Mineralogical results are expected to be available in the first quarter of 2023.
Metallurgical test work also included the measurement of physical properties - ultimate compressive stress (UCS), Bond crushing index (CWi), and Bond ball milling index (BBMi) at ALS, and the SMC A*b milling parameters at JK Tech in Brisbane. Both the UCS and CWi results indicate a soft to moderately hard material for crushing whereas the BBMi and SMC A*b values are at the upper end of moderately hard for milling to finer sizes.
All results are well within normally acceptable metallurgical parameter ranges and do not present any anomalies in terms of equipment design or performance. It is noted that NQ half-core was used for the UCS tests and had to be sub-cored. Hence the results should
be taken as indicative only at this stage. Future Work: In order to assess whether a single bulk concentrate can be produced from the Callisto mineralisation, a
sequence of further work is being undertaken including cleaner flotation and magnetic test work.
It was noted that physical properties were measured using NQ half-core which is only indicative for UCS as it
requires sub-coring to get a sample. Future measurements will need to be undertaken on full PQ core.