Flotation is a process of separation of an useful mineral from gangue.
ore
It is called smelting
Smelting
The process of extracting a useful substance from an ore typically involves crushing the ore to release the desired mineral, then separating the mineral from the gangue (unwanted material) using physical or chemical methods such as gravity separation, flotation, or leaching. Finally, the extracted mineral is further refined to obtain the desired substance in its pure form.
smelting
The color of a mineral in its powdered form is called streak. This can be determined by rubbing the mineral against a porcelain streak plate, which helps reveal the true color of the mineral's powder. The streak color can sometimes differ from the apparent color of the mineral, making it a useful property for identification.
Mineral extraction sites adjacent to the railroad line.
This is a raw material (feedstock).
A mineral that is useful and economically viable to extract and purify is an ore.
Recycling.
It is called fractional distillation.