Historical clue formulations

• Gets the lead out? — 2023-05-31
• Processes, as ore — 2016-12-17
• Goes for the gold? — 2015-03-14
• Processes, as ore — 2013-12-13
• Extracts metal from — 2013-10-06
• Processes, as ore — 2012-12-31
• Fuses, as ore — 2004-12-05
• Refines, as ore — 2004-11-30
• Refines, as metal — 2004-09-20
• Gets the lead out? — 2004-02-02
• Refines — 2003-09-14
• Refines — 2002-10-13
• Processes, as ore — 2002-07-15
• Refines — 2001-12-01
• Silvery food fishes — 2000-10-19
• Refines — 2000-05-06
• Fuses, as ore — 1995-11-07