Faisal Posted September 29, 2020 Share Posted September 29, 2020 Greetings, Setting a copper furnace, after the smelting process and having continuously remove the slag from the top of the furnace. While the molten copper pours into the ingot casts, water is sprayed on them too have them rapidly cooled. When the ingots pour out, they are again set straight into a mix of bath water and yet the final product still does not have that copper shine and mostly have the addition of inclusions or slag on them causing them to turn darker and black. What is a way around this ? i hope someone could help on the matter. Thank you Quote Link to comment Share on other sites More sharing options...
ThomasPowers Posted September 29, 2020 Share Posted September 29, 2020 Look into pickling the ingots after casting to remove surface oxides. Are you degassing the molten copper correctly? Smelting is making metal from ore; so is your ore a carbonite or sulfide ore---affects how you smelt it. Or are you just melting copper scrap? Quote Link to comment Share on other sites More sharing options...
Frosty Posted September 29, 2020 Share Posted September 29, 2020 Welcome aboard Faisal, glad to have you. If you put your general location in the header a member who knows how to cast copper may live within visiting distance and be willing to show you how. Hmmm? One mistake you're making is scraping the slag off repeatedly, that just exposes fresh melt to contaminants. Leave it alone until just before you pour, that's AFTER you degas. Are you fluxing the crucible? With what? Frosty The Lucky. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.