What can dragline excavators do that bucket wheel excavators can't?
Had you asked if they could replace face shovels, then I would have said that in certain circumstances (not many) then 'yes' However a replacement for draglines, a most definite 'no'. Bucket Wheel Excavators are mainly used to take material from a plane which is usually on the same level as the machine, as is a face shovel. That means the 'buckets' are 'biting' bottom to top and loading the material above the machine where a conveyor takes it to a single dispersal point. A dragline takes material from below the plane on which the machine is standing, and places the same material almost anywhere that is appropriate, or even into a waiting dump truck. If a B.W.E. is used to remove the same material, even though it is still removing material 'bottom to top', the material is now 'conveyed' under the machine, meaning that the machine (if it existed) would have to be rather high. To sum up, I would say that a B.W.E. is great for what it does, but ------ for maneuverability, flexibility and even transportability a dragline takes a LOT of beating
it's up to your imagination creativity as a site engineer , everything is possible in situ , sometimes bucket is used to push broken down vehicles
