Method for separating a mixture of granules via the triboelectric effect

An installation for the separation, by batches, of a mixture comprising granules of at least a first material and of a second material, the installation comprising:

• a reactor defining a fluidization chamber intended to receive one of the batches in order to obtain a fed in batch, the reactor being suitable for creating a fluidized bed in the fluidization chamber, the granules of the fed in batch being initially at rest in the fluidization chamber the reactor being suitable for producing at least one ascending stream of fluid passing through the fed in batch and putting at least a fraction of the granules of the fed in batch in suspension so as to obtain the fluidized bed, the fluidized bed being charged via the triboelectric effect, the reactor being suitable for modifying the stream of fluid and for feeding out at least 90% by mass from the fed in batch outside the fluidization chamber so as to obtain a fed out batch, and
• a separation unit suitable for creating at least one or a plurality of electric field(s), the installation being suitable for passing the fed out batch into the electric field(s) and for separating the fed out batch between at least a first mixture rich in granules of the first material and a second mixture rich in granules of the second material.