The Board of Sky Metals Limited advised of the successful production of a saleable tin concentrate from the metallurgical testwork program completed on the Tallebung Tin Project. To build on the exceptional ore sorting results previously announced in September 2022 (ASX SKY 5 September 2022), the ore sorting products were sent for metallurgical testing to produce a saleable tin concentrate at ALS Metallurgy. This testwork has successfully yielded a saleable tin concentrate.

The testwork showed a tin concentrate from the Tallebung tin mineralisation can be achieved through concentration via a simple gravity circuit with gravity concentrate dressing via reverse sulphide flotation and wet high intensity magnetic separation (WHIMS) to produce a >60% tin concentrate. These results were generated from the typical samples of the Tallebung tin mineralisation collected from the wide-diameter diamond drillhole TBD002 (60.2m @ 0.54% tin from 12.8m) from 2m - 92m for a total 542kg. This sample was sent to TOMRA Ore Sorting Solutions in Sydney and was crushed to down into -50mm grains.

The sample was then split into 25- 50mm and 8-25mm fractions for sorting and a <8mm fines fraction which was too fine to be sorted effectively. The 25-50mm and 8-25mm fractions were then sorted with TOMRA's XRT ore sorter into a product and waste. Assays for this testwork showed a tripling of the tin grade with 98% recovery for tin.

Further work will be conducted on ore sorting to continue to build on these very exceptional results in the future. The ore sorted samples were then sent on to ALS Metallurgy, Burnie, Tasmania where a thorough testwork program has developed a gravity flowsheet. This started with combining the TOMRA Ore Sorting product with the fines which were crushed and ground to -1180um before a series of spirals followed by a set of tables were used to produce a gravity concentrate.

These gravity concentration processes removed over 97% of the total mass processed and upgraded the tin concentration by over 25 times. The tin grade in the gravity concentrate is then further increased with a reverse sulphide flotation and Wet, High-Intensity Magnetic Separation (WHIMS) dressing of the gravity concentrate to produce a saleable +60% tin concentrate with low smelter penalties and a high payability product. 70-75% is the standard range of tin recovery for operations using this conventional tin gravity concentration methods as used in this testwork program, SKY has achieved over 73% recovery through the entire testwork process, however, SKY will be looking to increase the recovery with the addition of a gravity circuit for ultrafines to recover further fine tin and incremental improvements throughout the process.

SKY will continue to build on these excellent initial testwork programs with large scale testing of ore sorting and further development of this simple flowsheet to refine the production of a saleable tin concentrate for the Tallebung tin mineralisation over the coming months.