Job Description:

• 1) Operates classifier units to separate coarse and fine precipitated alumina particles from liquor: Regulates valves on settling trays of hydroseparators to draw fine particles from top and coarse particles from bottom of trays.

• 2) Adjusts valves to wash liquor from coarse particles in classifier unit.

• 3) Pumps fine hydrate from underflow of tray thickeners to storage tank for use in precipitating more alumina, and pumps coarse particles to storage tanks to await further processing.

• 4) Lubricates valves and adjusts packing glands to prevent leaks.

• 5) May open and close valves and start and stop pumps to circulate cleaning solutions through process lines.

• 6) May keep log of operations.