| Job Title |
Top-precipitator Operator |
| Job Description |
Tends Battery Of Tanks That Precipitate Aluminum Hydroxide
From Rich Liquor: Schedules Filling, Seeding, And Emptying Of
Precipitator Tanks. Opens Feedline Valves To Fill Tanks To
Designated Levels With Liquor And Alumina Seed Slurry. Adjusts
Valves To Regulate Rate Of Filling Precipitators And To Maintain
Specified Level In Green-liquor Tanks. Opens Feedline Valves To
Admit Measured Quantities Of Aluminum Hydrate Seed Particles
Into Precipitators. Turns Valves To Agitate Mixture With
Compressed Air. Turns Valves To Control Flow Of Liquor To Tanks
Of Secondary Thickness. Weighs Sample Of Mixture In Flask On
Platform Scale. Reads Charts And Graphs To Determine Amount Of
Slurry Or Liquor Required To Obtain Specified Consistency.
Signals Bottom-precipitator Operator (smelt. & Refin.) To Pump
Mixture From Tanks. Records Sequence Of Operations On Forms. May
Lubricate Valves And Adjust Packing Glands To Prevent Leaks.
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