| Job Title |
Alum-plant Operator |
| Job Description |
Controls Equipment To Produce Alum Liquor (aluminum Sulfate)
In Continuous Process Reaction Of Sulfuric Acid With Powdered
Bauxite: Notifies Other Workers To Unload Bauxite From Boxcars
Into Hopper Of Crusher. Starts Crusher, Mill, And Conveyors To
Replenish Storage Supply Of Powdered Ore. Observes Flowmeters
And Turns Valves To Regulate Flow Of Powdered Ore, Acid, And
Weak Alum Liquor Into First Digester In Specified Proportions To
Produce Mixture Of Prescribed Specific Gravity And Through Other
Digesters Where Chemical Reaction Occurs And Resultant Aluminum
Sulfate Liquor Is Settled And Diluted To Specified
Concentration. Tests Samples From Each Digester, Using
Hydrometer And Thermometer, To Verify Specific Gravities And
Temperatures. Turns Valves To Adjust Flow Of Steam Through
Digester Jackets And Proportions Of Materials Fed Into First
Digester To Regulate Temperatures And Specific Gravities
Accordingly. Pumps Finished Alum Liquor Into Storage Tank And
Weak Alum Liquors Into Settling Tanks (thickeners) For Recycling
Into Process. Records Temperatures, Specific Gravities, And Flow
Rates Of Materials In Operating Log And Level Of Alum Liquor
Storage Tanks On Inventory Records.
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