Material Selection for Dryer Lifters, Drag Conveyors and Dampers

1. What type of plates is the best for fabricating aggregate dryer lifter close to burner with more than 500 degree C or 950 degree F? It required heat resistant, abrasion wear resistant, good impact. If it concerns about cost and average duration, which one is the best then?

2. What type of material used at the end discharge of dryer which the aggregate is already mix with bitumen with 180 - 300 degree C?

3. How about the damper gate which hit by high pressure water with dust contain and temperature is around 200 degree C? which steel is the best?

4. For drag conveyor, what type is the best for its liner at bottom part? Alphaltic concrete is going through all the way up to the silo with temperature 150 - 200 degree C.