American Tungsten Reports Positive Initial Metallurgical Test Work Results From IMA Tungsten Project

Executive Summary

• American Tungsten Corp. announced positive initial metallurgical test work on tungsten‑silver mineralized material from the IMA Mine, showing high recoveries across gravity, dense media, and flotation processes.
• The results support a scalable processing pathway and complement the company’s recently completed $40 million bought‑deal financing, positioning it to advance de‑risking and development activities.
• Additional testing is planned to further validate process designs and assess variability.

Key Details

• Gravity Concentration (Falcon): Staged Falcon gravity concentration with re‑grinding achieved 94.4% WO₃ recovery. Initial stage recovered 84.4% at 29.6% mass pull; re‑grinding added another 10.0%, indicating potential >90% overall recovery via gravity methods.
• Heavy Liquid Separation (HLS/DMS): Achieved 91.1% WO₃ recovery with a 33.8% mass pull at 2.65 SG cut; 65.3% recovery (13.81% WO₃ grade) at 4.4% mass pull for the 2.85 SG cut.
• Flotation of Sulfides: Sulfide‑pre‑flotation recovered 83.2% Cu, 72.0% Ag, 59.1% Mo with only 4.1% WO₃ loss (2.46% grade) at a very low mass pull of 1.44%; subsequent WO₃ rougher flotation recovered 89.7% WO₃ at 14.93% mass pull.
• Sample Characteristics: 130 kg of material from six channels in veins No. 5 & No. 7 (D level) – head assays: 1.1% WO₃, 83 ppm Ag, 0.09% Cu, 0.037% Mo, 0.41% S.
• Bond Ball Mill Work Index: Measured at 13.51 kW·hr/tonne, indicating medium‑to‑hard grindability and moderate energy requirements.
• Future Test Plans: Include HLS crush size variability, locked‑cycle Falcon testing, sulfide pre‑flotation with Falcon concentration, magnetic separation for concentrate upgrading, and geo‑metallurgical variability studies. Ongoing work on historical tailings also underway.
• Financing Context: Results follow a recently completed $40 million bought‑deal financing, providing capital to accelerate technical de‑risking and development.

Notable Quotes

“These initial metallurgical results reinforce the robustness of the material's response to dense media and gravity separation, supporting our view that the IMA Tungsten Project has the potential for an efficient and scalable processing pathway… we are in a strong position to accelerate technical de‑risking and advance key development activities.” – Ali Haji, CEO, American Tungsten Corp.