The problem with using a Mixer is that it’s nearly impossible to get. The only actually attainable recipe for Chromium (the Sluice one in the Centrifuge) is ridiculously unlikely to get even a small amount of Chromium. The rest all require either impossible molten materials, or impossible Chromium based materials.
I know there’s probably a much easier way of getting Chromium, but NEI does not tell me how, and Google gives me nonsense.