By the method described above, a slurry containing {HEAD ~ an iron sulfide} of {TAIL ~ the invention} is obtained 
of
By the method described above , a slurry containing { HEAD ~ an iron sulfide } of { TAIL ~ the invention } is obtained
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH