why is there a need to crush iron ore bearing rock
The Need To Crush Iron Ore Bearing Rock. The Need To Crush Iron Ore Bearing Rock. The classic old mortar and pestle was the method used by early day miners to crush their ore specimens for testing.You can still buy these things today at most prospecting stores - they are made of cast iron and last a long time and work fairly well.It just takes a lot of elbow grease and work to break up the rock.