Gallium recovery from flourspar tailings9 Nov 2025 14:21
Gallium recovery from flourspar tailings (perked my interest this morning, so here's a Google search result),
Ai Overview:
During fluorspar recovery via the flotation process, the gallium is not floated with the fluorspar but instead reports to the process tailings. This means that standard fluorspar flotation does not recover gallium in the concentrate; rather, it is a separation step, concentrating the gallium in the waste stream.
Gallium in fluorspar ores is often associated with other minerals, such as feldspar (aluminum silicates) or rare earth element (REE) minerals, which have different surface properties than fluorspar. Fluorspar flotation typically uses fatty acids as collectors in an alkaline pH environment to make the fluorspar hydrophobic and attach to air bubbles, while hydrophilic impurities (like those containing gallium, aluminum, and silicon) remain in the water as tailings.
The recovery of gallium from these tailings or other gallium-bearing materials typically requires a separate, multi-stage hydrometallurgical process, not the fluorspar flotation itself:
Leaching: The tailings are subjected to acid or alkaline leaching to dissolve the gallium.
Purification: The resulting solution undergoes purification steps, which can include techniques like solvent extraction, ion exchange, or precipitation, to separate gallium from impurities like aluminum, iron, and silicon.
Recovery: Finally, the gallium is recovered as a pure metal or oxide using methods such as electrowinning or precipitation followed by calcination.
Therefore, gallium is separated from fluorspar using flotation, and then a dedicated downstream process is needed to recover the gallium from the flotation tailings.
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