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 located in a lower portion of the vessel 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 a discharge conduit configured to convey rejects away from the vessel, 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 discharge conduit being connected to and being downstream of the second outlet, the turbine classifier being configured to expel the rejects radially outward therefrom, through the second outlet and into the discharge conduit;
• and
• the grinding zone, the grinding assembly, the classifier zone and the turbine classifier all coexist in an interior area defined by the vessel.

The roller mill system of 9, configured as a pendulum mill comprising:

• a bowl assembly mounted in the grinding zone, wherein the grinding assembly is mounted in the grinding zone proximate the bowl assembly;
• the grinding assembly comprising a plurality of rollers each mounted on a journal, each of the journals being pivotally connected to a support arms via respective pivot joints;
• the support arms being connected for rotation to a drive shaft;
• the drive shaft is supported for rotation relative to a frame by a bearing assembly;
• and
• the support arms being configured to rotate with the shaft and cause the journals to swing radially outward, thereby causing the rollers to rolling engage a radially inward facing grinding surface of the bowl assembly.

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 located in a lower portion of the vessel 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 a first discharge conduit and a second discharge conduit;
• the rejects capture and discharge system comprising a collection trough located under the grinding assembly and connected directly to the first discharge conduit and the first discharge conduit being configured for discharging rejects from the grinding zone;
• and
• the rejects capture and discharge system comprising 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 second discharge conduit being connected to and being downstream of the second outlet, the turbine classifier being configured to expel the rejects radially outward therefrom, through the second outlet and into the second discharge conduit;
• and
• the grinding zone, the grinding assembly, the classifier zone and the turbine classifier all coexist in an interior area defined by the vessel.