I've tried everything I can think of to put mercury in the Industrial Grinder. I'm using FTB Ultimate. I have a setup that pumps water in just fine. I have been unable to pump in liquid Mercury, or export mercury cells using AE, or even use a router to insert it into cell 2. Any suggetions?
Pump mercury cells to the bottom of the grinder. (May be a side, I don't recall). Use a wood pipe connected to a chest or the equivalent, and use regular buildcraft stone pipe to pipe them to the bottom. A piece of gold pipe may help, as well as some testing in creative.
Be positive you're piping to the Industrial Grinder and not the Machine Casings.
Thanks to @iananananan for trying the bottom suggestion. You still can't pump liquid mercury into it (at least I couldn't with my liquid tesseract and liquiducts, even with the liquiducts being full.
Even inserting into the bottom with the Router didn't work, but using an ME Export, it worked just fine.