I only ever use one copper ingot recipe anymore and its not even close : r/SatisfactoryGame
Copper Ingot Mega Factory - Mega Factory 2.0 - Satisfactory Update 7 - EP03 - YouTube
4500 Copper Ingots from ONLY ONE BLUEPRINT!!! - YouTube
Pure Copper Ingot (1.500/min.) / Blueprints / [SCIM] Satisfactory - Calculator | Gaming Tool/Wiki/Database to empower the players.
Simple 720 copper ingot smelting setup I chose to brighten up a bit : r/ satisfactory
Copper Ore - Official Satisfactory Wiki
Copper Ingot Factory / Gallery / Satisfactory Guru
Copper Ingot Factory Update - 2400 Ore into 6000 Ingots. There were requests for more photos so I made a video tour. It's still a WIP. : r/SatisfactoryGame
Iron and Copper Ingot Factory / Gallery / Satisfactory Guru