How do trommels remove unwanted material from titanium-bearing sands?

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In the context of titanium processing, trommels are used during the initial mining and concentrating phase. When mineral-rich sand is supplied to these devices by a floating dredge, the trommels act as a set of revolving screens that physically remove unwanted materials from the sand.12

Following this screening process, the remaining minerals are typically subjected to gravity separation in a wet spiral concentrator to further isolate them from waste material.1