Ⅲ.ApplicationtrendofrareearthinironandsteelCurrently,pretreatmenttohotmetalandmoltensteelrefininginChinaarenotsopopularasindevelopedcountries.Thecontentofsulfurinlow-alloysteelinsomesmallandmediumsteelmillsinChinaisabout0.012%,whichisseveraltimeshigherthanthatino-