If you want to mess with mods and all that comes with them then yeah, probably an answer there. If you don't wan't to mess with all that and the headaches they can bring (for me, anyway) then no, this isn't Minecraft where you can redstone everything. Build more kilns/smelters or, if not in a rush, just load 'em up and get on about your day. Come back a little later to collect/refill. Try not to be OCD about smelting everything but if you are in a hurry or can't stand those unrefined rocks laying around then yeah, build more processing equipment.