Lumo Posted September 18, 2020 Share Posted September 18, 2020 Quote Link to comment Share on other sites More sharing options...
Bedrock Bob Posted September 18, 2020 Share Posted September 18, 2020 That is a chunk of refractory waste from an arc furnace. Slag. 1 Quote Link to comment Share on other sites More sharing options...
Lumo Posted September 19, 2020 Author Share Posted September 19, 2020 (edited) Darn, was hoping for something cool . :( I wonder how it got that glass look and feel ?? Edited September 19, 2020 by Lumo 1 Quote Link to comment Share on other sites More sharing options...
Au Seeker Posted September 19, 2020 Share Posted September 19, 2020 2 hours ago, Lumo said: Darn, was hoping for something cool . :( I wonder how it got that glass look and feel ?? Glass is made from sand..silica, the glass look is from silica that was part of the impurities in whatever was being refined. 1 Quote Link to comment Share on other sites More sharing options...
Bedrock Bob Posted September 19, 2020 Share Posted September 19, 2020 Glass (silica) is used to flux metal when smelting. Molten metals will oxidize rapidly. So silica (quartz, glass, etc.)is added to the furnace to cover the molten metal and keep it away from oxygen. The glass in the furnace works exactly like the silica covering an arc welding rod or the shielding gas in a MIG or Heli arc process. Any time you melt or weld metal there is something to keep it from gobbling up oxygen. Smelting under a puddle of molten glass is the cheapest and most popular way to accomplish this. 2 Quote Link to comment Share on other sites More sharing options...
Lumo Posted September 19, 2020 Author Share Posted September 19, 2020 Thank you, this was more than helpful I appreciate it ! 2 Quote Link to comment Share on other sites More sharing options...
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