Even at <3min for processing 32 iron ore you will run into problems with my suggested mobile harvester.  You will probably be looking at more like 5-6 stacks of ore in that 3 minutes.  1 IC2 miner produces pure ore faster than a quarry.  7 or more running simultaneously?  It'll be coming out your ears.
				
			 
				
		




 
		 
	