Roller mill system with rejects removal system

A roller mill system for grinding material into fine particles, the roller mill system comprising:

• a vessel having an inlet and a first outlet, the vessel being configured for flow of a gas from the inlet to the first outlet, the vessel comprising a grinding zone and a classifier zone located downstream of the grinding zone;
• the grinding zone comprising a grinding assembly configured for grinding the material into fine particles;
• and
• a rejects capture and discharge system comprising at least one discharge conduit for conveying rejects away from the vessel, and at least one of:
• a collection trough located under the grinding assembly and in communication with the at least one discharge conduit, for discharging rejects from the grinding zone;
• and
• a turbine classifier mounted in the classifier zone and being rotatable about a central axis, a second outlet formed in a side wall of the classifier zone, the turbine classifier being configured to expel the rejects radially outward therefrom, through the second outlet and into the at least one discharge conduit.