Specifically, it looks like the recipe "k-coke" is still in the "coke-smelting" category, so it cannot be crafted by the Superior Furnace or any of the IR furnaces. It's available in the vanilla electric furnace still, but that furnace can't be crafted with both mods active, so there's no way to craft coke at all currently.
I think this recipe needs to be moved to either the vanilla smelting category, or one of IR's smelting-# categories. It looks like if you want coke to only be available from electric furnaces onward that smelting-3 would be the correct one to use.
Poking around, it looks like the only other furnace recipe that hasn't been properly migrated is k-iron-beam-2; that still exists and is assigned to k-smelting, which has no machines that support it when IR is present. Given that the other k-smelting recipes have been set to nil (k-steel-2 and -3), I'm guessing this should be set to nil as well.
