A wet-process phosphoric acid plant needed an agitator rotor able to survive the corrosive conditions of phosphate fertiliser production. Both the hub casting and the welded blades were made in Ferralium® 255 for its high resistance to attack.
The casting forms the hub of a turbine (agitator) rotor, with blades welded onto the stubs shown. It runs in a reactor vessel used in wet-process phosphoric acid production, part of the manufacture of phosphate fertilisers. Cast Ferralium® 255 was chosen for the hub and Ferralium® 255 plate for the blades.
Design and dimensions
- Hub casting weight: 119 lb
- Hub casting diameter: 13"
- Blade material: 3/8" thick Ferralium® 255 plate
- Complete turbine rotor diameter: 54"
The hub is designed for maximum rigidity, so the welds between the blades and the hub casting can be made perfectly sound and are not subject to excessive fatigue.
