It should not be "burned" as in a bonfire (like is done in many places). It needs to be burned in an electric arc furnace or mixed with coke for steel at temperatures in excess of 1000k.
OH, for sure. I agree. But that is what most people tend to do when they do this sort of thing. Even the 'furnace' they had was just a bonfire essentially in a enclosed can with vents. And that was specially bought from a company that sold it for that purpose. I forget the name though, sorry.