The method 1 wherein said solid particulate material is selected from the group of sand, carbon, {HEAD ~ graphite}, {TAIL ~ silicon carbide}, magnesite, and dolomite 
The method 1 wherein said solid particulate material is selected from the group of sand , carbon , { HEAD ~ graphite } , { TAIL ~ silicon carbide } , magnesite , and dolomite
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH