| Job Title |
Wet-mix Operator |
| Job Description |
Controls Premixer And Reaction Vessels To Produce
Orthophosphate Liquor By Reaction Of Phosphoric Acid With Soda
Ash: Sets Timing Device On Weigh Tank To Effect Prescribed Feed
Rate Of Soda Ash To Premixer. Starts Premixer, Pumps, Exhaust
Fans, Screw Conveyors, And Bucket Elevator In Required Sequence.
Observes Flowmeters And Turns Valves To Regulate Flow Of
Phosphoric Acid And Water To Premixer As Specified. Swings
Discharge Spout Over Reaction Vessel, And Starts Agitator In
Vessel To Admit And Mix Product. Turns Valve To Regulate Flow Of
Steam Through Vessel Heating Coils To Attain Reaction, Observing
Thermometer To Verify Required Temperature. Lowers Dipstick Into
Tank To Obtain Sample For Laboratory Testing. Turns Valves To
Add Measured Amounts Of Chemicals, As Indicated By Laboratory
Reports, To Regulate Chemical Properties Of Mixture To
Specifications. Turns Valves And Starts Pump To Transfer
Finished Mixture To Spray Drier Feed Tanks.
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