Can you do the reverse mode?
That is, for iron and copper to go through all stages. And then the final resource was smelted 1 to 1 (ordinary ore, for example 10 to 1).
So to say, "add a little realism."
By the way, what about coal enrichment? (Although in fact, this is just cleaning from external impurities, too (I work on coal preparation))

Not sure what you mean by the first half.

Coal and Stone are not on the list of things to refine since they are available as a byproduct.

For example, reduce the base efficiency of coal, but increase as it is processed.
By the first half, I mean 10 units of base copper and iron ore smelted into 1 plate.
And the most processed version produced 6-8 refined ores for 10 spent ores, which float 1 to 1.
About coal. For example, reduce the base efficiency of coal, but increase as it is processed.

A separate mod could achieve that fairly easily, it's outside the scope of mine.

It's sad. Well, trying isn't torture.