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The Key Lake U mill uses a stepwise neutralization process (pH 4.0, 6.5, 9.5, and 10.5) to treat raffinate (acidic, metal-rich wastewater) prior to safely releasing effluent to the environment. This process generates a complex mixture of precipitates that are deposited to a tailings facility. In this study, the coordination environments of As and Ni with respect to Al-Mg phases precipitated in the...
A pilot-scale model of the Key Lake bulk neutralization process (KLBN), termed the synthetic raffinate neutralization system (SRNS), was constructed to study the geochemical controls and the secondary mineralogy of uranium mine tailings deposited into the Deilmann Tailings Management Facility in northern Saskatchewan, Canada. Comparison of the synthetic raffinate with samples collected from the KLBN...
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