Job Description:

• 1) Tends equipment that cleans and dries ammonium sulfate crystals: Pushes crystals from drain table into trough.

• 2) Opens trough gate to discharge crystals into drier.

• 3) Starts centrifuge to separate crystals of ammonium sulfate from acid and tar.

• 4) Washes remaining impurities from crystals with hot water, using hose.

• 5) Resumes spinning of centrifuge to complete drying.

• 6) May neutralize acid in sulfate crystals with ammonia liquor.