Research and Application of High Efficient HM Desulphurization

New technologies,new materials and optimization used on HM desulphurization was discussed to reach the target of w(s) of less than 0.010%at blowing end,while No 1 steel-making and rolling plant producing ultra low sulphur steel grade.The desulphurization rate was more than 90%,the loss of HM was less than 28 kg/t HM,the temperature drop was less than 26 ℃,the desulphurization cycle was less than 35 min,and got the result of low sulphur return,high blowing lance and harrow life.The high efficient desulphurization was realized and satisfied the requirement of clean steel production.