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Job Description:

  • 1) Controls chemical-processing equipment to recover tungsten oxide from ground concentrated ore: Starts conveyor to fill reactor tank with ore.

  • 2) Turns valves to pump specified quantity of hydrochloric acid into tank and to admit steam into tank jacket.

  • 3) Observes temperature gauge and adjusts valves to maintain acid solution at specified temperature for specified time.

  • 4) Fills tank with water to wash slurry, and drains waste-bearing water.

  • 5) Turns valve to pour slurry into caustic tank.

  • 6) Precipitates impurities, such as chlorides and oxides, by adding ammonia and sulfuric acid to solution.

  • 7) Filters solution into holding tank to remove precipitate.

  • 8) Adds specified amount of hydrochloric acid to tank to crystallize solution.

  • 9) Dries tungsten oxide crystals by pumping them through filter or centrifuge.




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End Of Job Description for: "TUNGSTEN REFINER"
DOT:   511.382-010

Job Number: 11555