There is currently no method of automating zircon or it's products on vulcanus without a recycler and the recycler recipe.

That was originally intentional (because Zirconia/Zirconium is not in high demand there and you can get it in the rocks), but I think I made a couple inconsistent decisions that make this not feel great overall. I will take another look at Vulcanus for this mod.

Ok I've made some updates to the Vulcanus processes with this mod in latest. I think it's in a better place now.