It isn't well explained, but you need to buy at least one smelter before refining will do anything. It probably should either start you off with 1 smelter or message the user if they try smelting without a refiner, instead of making them waste at least a minute doing nothing.
 "Frugal Knight"){kind=icon}
 "Hat Wizard")
 "Treasure Chamber! Idle Mining Adventure")
 "SkillQuest")
 "The Vault")