Bates Hunter Mine
Milling and Mass Balance Report April 29, 2021 – September 30, 2021
Material source Bates-Hunter 500-foot level bulk sample
New rock material was mined from the Bates-Hunter 500-foot level, transported, and milled (pilot scale mill) in the Golden Gilpin Mill. The intent of this study was to calculate a mass balance to determine at a pilot scale which products, and at what concentrations the gold reported to. Also, more importantly to generate a process representative tailings product. These tailings will be utilized for subsequent testing to determine the rheology (flow characteristics at various moisture contents, necessary pozzolanic additive to adjust compressive strength at reasonable set-time, and final additive suite for the ultimate backfill product), as well as the acid-base accounting and toxicity characteristic leaching procedure (ABA/TCLP). This testing aims to define the cradle to grave process for mining, milling, and backfilling for the Bates-Hunter mine, and will be utilized for permitting purposes.
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