I strongly oppose 10xOre=1xGood Ore. That defeats the whole unsafe mines concept.
So you can refine crap ore into high grade materials if you are desperate enough.
As I said. That defeats the whole point. Even 20 to 1 is too good. If it means you can safely get HQ then people will mine for hours on end with their alts or bots.
It's 200 to 1.
If you FAIL at Crafting, you get Junk. (And there should be a Crafting Success Rate)