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       CODE: 559.685-014 Buy the DOT:Download/CD-ROM
TITLE(s): ALUMINUM-HYDROXIDE-PROCESS OPERATOR (chemical; pharmaceut.)
Tends steam-jacketed kettles, mixing tanks, filter press, string filter, and related equipment to
process ammonia solution and aluminum sulfate into aluminum hydroxide: Meters water into
steam-jacketed kettle and sets thermostat at specified temperature. Dumps preweighed bags of
aluminum sulfate into kettle, and starts agitator to dissolve ingredient. Meters specified amounts
of hot water and ammonia into mixing tank and starts agitator. Pumps aluminum sulfate solution
through filter press into heated agitator tank to remove insoluble materials. Pumps ammonia solution
to tank with aluminum sulfate solution. Ladles sample of mixture, adds test solution, and observes
color reaction to determine degree of precipitation. Adds specified ingredients to mixing tank to
complete precipitation, according to results of test. Pumps slurry through string filter to separate
aluminum hydroxide from mixture. May replace filtering media and repair equipment, using handtools.
GOE: 06.04.11 STRENGTH: M GED: R3 M2 L2 SVP: 4 DLU: 77
ONET CROSSWALK: 92938 Chemical Equipment Tenders
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