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TITLE(s): KETTLE TENDER II (smelt. & refin.) Tends gas-fired kettle that removes gold, silver, and copper from black mud: Shovels mud into kettle, and turns valve to admit acid until mud is covered. Rakes mud to dissolve gold and silver. Ladles solution into water-filled settling tank to precipitate gold and silver compounds. Removes precipitates and adds reagents to change their chemical composition. Heats precipitates in cupola furnace to extract gold and silver. Ladles remaining mud into tank filled with water and admits steam to dissolve copper. GOE: 06.04.10 STRENGTH: M GED: R3 M1 L2 SVP: 4 DLU: 77 ONET CROSSWALK: 92962 Separating, Filtering, Clarifying, Precipitating, and Still Machine Operators and Tenders | |||||||||||||||||||||||||||||||||||
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