BUG:? Recipe for Steel using Bast Furnace 2 Questionable.

The current recipe for the oxygen furnace recipe requires both molten iron AND (not or) scrap iron. This will bring the steel mill to a halt when running out of scrap iron. Not that much scrap iron to work with. Is this your recipe? It should be a Separate recipe. One for Moten iron and another for scrap, or rely on the original open hearth to process scrap iron only.

This is fully intentional. Look up how the real-world oxygen furnace works. Scrap (or something else like DRI iron) is needed to keep the exothermic reaction from melting the oxygen furnace.

If you need more scrap, use the shredder to make some (or research DRI iron for example).