Here’s the usual way to get a raw mill in Industrialist : you unlock it by progressing through the game’s research/building tree, then place it after you have the needed materials and power setup. Community guides show it is used to combine limestone, gravel, and clay into raw mix, so it’s part of the cement/concrete production chain rather than an early standalone machine.

What to do

  • Build the prerequisites first: quarries for clay and limestone , plus a grinder if you need gravel.
  • Unlock the raw mill through the appropriate research path; one recent community guide specifically mentions Research Station 2 for researching it.
  • Place the raw mill, connect input pipes for limestone, gravel, and clay, and power it so it can produce raw mix.

Why you need it

The raw mill is the step that turns mined materials into raw mix, which is then used downstream in cement production. In the common beginner setup, raw mix goes to an industrial kiln to make cement, which then feeds concrete production.

Quick setup order

  1. Quarry clay and limestone.
  2. Grind soil if your setup needs gravel.
  3. Unlock and place the raw mill.
  4. Pipe the inputs in.
  5. Power it and pull out raw mix.

If you meant “how do I unlock raw mill research” rather than how to use it, the answer is likely the Research Station 2 path mentioned in community content.