Just a Thought, the ratios of lime usage is pretty good through the Iron Process, until it gets to casting where it flys out the window, i assume its a balance thing, but to keep the realism you could use the chem plant to mix water with crushed limestone and use a liquid input instead of Crushed Limestone, that would add some complexity, improve the realism and reduce the current 10k/s crushed limestone i need for my blasting arrays and i only have the basics set up.
that slurry could either vanish or be returned as a lime wash waste byproduct that can be filtered returning a small amount of water and lime sludge that can be dried into a small amount of limestone ready to be reintroduced into the crushing process, it would heavily reduce the amount we have to pull out of the ground.
Im loving the mod so far, thanks for the work