A conveyor (10) for moving hot or cold material along a trough (12) receiving the material. One or more heat transfer fluid flow tubes (36) extend over the outer surface of a trough liner wall (38) to indirectly cause cooling or heating of the liner wall (40). A series of wear plates (76) are clamped to a pushing side of a helical tube (74) of an auger type conveyor (52), which tube can also receive a flow of heat transfer fluid. A mass (92) of conductive beads can alternatively be used to transfer heat into or from the heat transfer fluid.
