Because of these drawbacks, {TAIL ~ the slurry} is usually converted to an iron sulfide powder through filtration, {HEAD ~ washing}, and subsequent drying 
Because of these drawbacks , { TAIL ~ the slurry } is usually converted to an iron sulfide powder through filtration , { HEAD ~ washing } , and subsequent drying
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH