thanks, i tried a few things but not that

Like smelters, it needs more than one ingredient. Climb up to the grinder to fill the other slot

with what

Soft tissue goes in top. Mine it out of the petrified bone skulls (will have ticks so look for them around ticks with no gjall). It is also dropped by dvergr and their crates but the skulls are the big deposits.

Refinery will shoot out projectiles while it operates too, can damage your base. Build metal cage or black marble sarcophagus around it to prevent damage.

https://valheim.fandom.com/wiki/Soft_tissue