Smelt/smelting is a word one sees frequently used on the site, and used incorrectly. I would be mightily impressed if anyone had the equipment to smelt lead. We melt it, plain and simple, that is all we do.
Smelting: Uses suitable reducing substances that will combine with those oxidizing elements to free the metal. Reduction is the final high temperature step in smelting. It is here the oxide becomes the final elemental metal.
Sooo...smelting is part of the process of extracting the metal from the ore, not something done at home with a lead furnace or other source of heat and casting into bullets or ingots. That is simply melting lead, not "smelting".