
Tin has melted down first, which results in the molten metal temporarily becoming an unknown alloy mixture. It will be sorted out when the copper is added.

Molten metal may become solid if the temperature drops. Simply raise the temperature again to resume pouring ingots.

Pretty hot but not hot enough for copper to melt when charcoal is used as the fuel. Use blowpipe or bellows to get it hotter.

When everything has been smelted down and there is no activity, after a countdown the content gets automatically mixed. This is not necessary. Molten metal becomes proper alloy when poured into a mold, mixed or not. It's just a cool thing that happens.

Everything gets mixed and merged in the end.

Molten metal can be poured into a mold in a familiar fashion.

Second batch of bronze for our anvil. The total will actually come to the maximum volume of metal a Clay Crucible can take, leaving us with one ingot extra.

Alloy anvil worth of bronze - first batch. Tin has already melted but copper may need some help from a blowpipe or bellows.

Right click while holding a metal blowpipe with glass, similar to knapping stone or leather, this is how glass bottles can be crafted.