A professional who tends series of oil-fired kettles that refine lead. Respnsibilities include:

• Charges kettle with lead in molten or pig form, and fires kettle.
• Adds specified type and amount of reagent and agitates mixture to cause impurities, such as antimony, arsenic, bismuth, and tin to form into dross.
• Skims dross off mixture, using ladle, shovel, or perforated dipper.
• Throws zinc bricks into kettle and agitates mixture to desilverize lead.
• Skims crust of silver and gold content into basket of press, and compresses dross with air-driven ram.
• Pumps lead through reaction cylinder while chlorine is admitted to form zinc chloride slag.
• Skims slag after completion of reaction as indicated by color of slag and molten metal.
• Pours metal into molds or dips samples into cold water to prepare them for laboratory analysis.
• May hook pot to crane and signal overhead crane operator to transfer lead from one kettle to another.
• May crystallize zinc in water-cooled vacuum tank to remove zinc from desilverized lead.
• May produce antimony crystals from antimonial lead by mixing prescribed reagents with molten metal in kettle, by skimming dross, and by cooling bath to specified temperature.
• May be known according to specific duty performed as Desilverizer.