* Low ql smelting pots cap the ql of the lump to 50 ql.
* Smelting items seems to give lumps equivalent to the ql of the item being smelted.
* Metal items must be glowing hot to smelt down into a lump. Make sure you let it heat more to heat after reaching glowing hot, otherwise it will not give yet the option to smelt.
* This is not a container, but it's activated and used like a tool.
* Smelting a rare or better item will turn it into a rare lump.