American Tungsten releases metallurgy results at IMA

Executive Summary

• American Tungsten Corp. announced positive initial metallurgical test results from Sepro Laboratories on tungsten‑silver mineralized samples from the IMA mine in Idaho.
• Gravity concentration (Falcon) achieved 94.4 % WO₃ recovery; heavy liquid separation reached 91.1 % WO₃ recovery with a 33.8 % mass pull; flotation concentrated valuable sulfides while limiting WO₃ loss.
• The results support the company’s view that the IMA project has an efficient, scalable processing pathway and bolster confidence following its recent $40 million bought‑deal financing.

Key Details

• Test Program: 130 kg of material from six channels (No. 5 & No. 7 veins) processed by Sepro; head assays averaged 1.1 % WO₃, 83 ppm Ag, 0.09 % Cu, 0.037 % Mo, 0.41 % S.
• Gravity Concentration (Falcon): Staged Falcon with regrinding delivered 94.4 % WO₃ recovery; initial stage 84.4 % at 29.6 % mass pull, additional 10 % recovered after regrinding to P80 = 75 µm.
• Heavy Liquid Separation (HLS): At 2.65 SG cut point achieved 91.1 % WO₃ recovery with a 33.8 % mass pull; at 2.85 SG cut, 65.3 % recovery in a 4.4 % mass pull.
• Flotation (Sulphide‑Tungsten): Pre‑flotation recovered 81.4 % S, 83.2 % Cu, 72.0 % Ag, 59.1 % Mo at 1.44 % mass pull with only 4.1 % WO₃ loss; subsequent WO₃ rougher flotation gave 89.7 % WO₃ recovery at 14.93 % mass pull.
• Bond Ball Mill Work Index: Measured at 13.51 kWh/t, indicating medium‑to‑hard grindability.
• Future Testing Planned: Additional HLS crush size variability, locked‑cycle Falcon testing, magnetic separation, and geometallurgical variability studies; ongoing work on historical tailings.
• Financing Context: Results follow a recently completed $40 million bought‑deal financing, providing capital to accelerate technical de‑risking and development activities.

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 derisking and advance key development activities.” – Ali Haji, CEO, American Tungsten Corp.