Abstract：The methods and key process problems of hot metal desulphurization with Mgbased reagents are discussed in detail, according to thermodynamics and kinetics and combining with hot metal desulphurization technology at Baosteel. The desulphurization efficiency are influenced greatly by reagent injection rate, lance position, lance design, temperature and etc. The problems are brought forward. The methods are given to solve these problems. Most of injected magnesium are vaporized and oxidized，only a small part of magnesium is used to desulphurize hot metal. At same time, the properties of desulphurization slag are deteriorated by formation of MgO.
孙兴洪;夏幸明;龙川江. 铁水包双枪脱硫的理论与实践[J]. 钢铁, 2007, 42(1): 27-0.
SUN Xinghong;XIA Xingming;LONG Chuanjiang. Theory and Practice of Desulphurization of Hot Metal in Ladle by Using Double Injection Lance. Iron and Steel, 2007, 42(1): 27-0.
2007, Vol. 42 
