title_body: Is it possible to grind then roast?
upvoted_answer: No. Unroasted coffee beans are denser and wetter than roasted beans and will not grind well. You will break your grinder trying, and even if the grinder succeeded, you'd get more of a mush than solid grinds.
  
  Also, roasting ground green coffee would allow much more of the oils and gasses trapped in the coffee to leak out during roasting than even the driest roast. The resulting coffee would taste strange.