Gekko's dedication to designing energy efficient flowsheets includes exploiting the importance of gangue rejection. Gangue rejection is the process of separating and disposing the poorest, low quality, low value material in an ore feed prior to further downstream processing. Simply put, the focus is on the waste to reject,.
In mining, gangue is the commercially worthless material that surrounds, or is closely mixed with, a wanted mineral in an ore deposit. It is thus distinct from overburden, which is the waste rock or materials overlying an ore or mineral body that are displaced during mining without being processed. The separation of mineral.
Gangue Minerals What Do They Tell Us? ICMJ's Prospecting
In this case, the gangue and valuable minerals need to be separated in the milling process. Gangue minerals are normally of a lower specific gravity than the ore minerals and can often be mechanically separated from them using gravity based systems, but processes like flotation, leaching and magnetic methods are also.