Rotor for a rotary pre-heater for high temperature operation

A rotary pre-heater comprising:

• an annular housing;
• a hot-end connecting plate having a first inlet and a first outlet, the hot-end connecting plate being secured to a first axial end of the annular housing;
• a cold-end connecting plate having a second inlet and a second outlet, the cold-end connecting plate being secured to a second axial end of the annular housing;
• a rotor disposed for rotation in the annular housing and between the hot-end connecting plate and the cold-end connecting plate, the rotor comprising:
• a cold-end rotor mounted for rotation on a spindle proximate the cold-end connecting plate, the cold-end rotor having a first plurality of flow passages extending therethrough;
• a hot-end rotor assembly disposed on the cold-end rotor, the hot-end rotor assembly being proximate the hot-end connecting plate, the hot-end rotor assembly having a second plurality of flow passages extending therethrough, the hot end rotor comprising:
• a hub having an exterior surface thereon;
• an annular rim positioned around and coaxially with the hub, the annular rim having an interior surface;
• and
• a plurality of partitions extending between the hub and the annular rim, each of the partitions being located in a predetermined circumferential position by at least one alignment feature;
• wherein
• at least one of the exterior surface, the interior surface and the partitions having at least one alignment feature thereon.