Job Description:

• 1) Controls temperature, chemical composition, and level of cryolite baths in reduction pots to smelt aluminum oxide into aluminum: Breaks off sample piece of crust formed on bath surface, and grinds it into powder, using roll crusher.

• 2) Routes sample to laboratory for analysis.

• 3) Dips out sample of solution and pours it into containers, using ladle.

• 4) Drops chemicals into sample and notes resultant color.

• 5) Adds specified amounts of chemicals and alloys to bath, according to color shade of sample, to maintain solution at specified level and composition.

• 6) Measures current flow and voltage between electrical connections on pots, using meters, and computes voltage drop between connections.

• 7) Measures temperature of bath, heat exchangers, and heat-control pipes, using pyrometer, and turns rheostat to regulate temperature.

• 8) Verifies specified distance between electrodes, using measuring rod.

• 9) Measures depth of bath, and computes amount of aluminum available for tapping.

• 10) Records tests made, amount of chemicals and alloys added to bath, and amount of aluminum tapped from pots.