| Job Title |
Tungsten Refiner |
| Job Description |
Controls Chemical-processing Equipment To Recover Tungsten
Oxide From Ground Concentrated Ore: Starts Conveyor To Fill
Reactor Tank With Ore. Turns Valves To Pump Specified Quantity
Of Hydrochloric Acid Into Tank And To Admit Steam Into Tank
Jacket. Observes Temperature Gauge And Adjusts Valves To
Maintain Acid Solution At Specified Temperature For Specified
Time. Fills Tank With Water To Wash Slurry, And Drains
Waste-bearing Water. Turns Valve To Pour Slurry Into Caustic
Tank. Precipitates Impurities, Such As Chlorides And Oxides, By
Adding Ammonia And Sulfuric Acid To Solution. Filters Solution
Into Holding Tank To Remove Precipitate. Adds Specified Amount
Of Hydrochloric Acid To Tank To Crystallize Solution. Dries
Tungsten Oxide Crystals By Pumping Them Through Filter Or
Centrifuge.
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