【摘要】 <正> 1. 绪言喷射冶金是近十年内发展起来的一种炼钢新工艺,由于动力学因素显著改善,促使冶金反应可在极短的时间内完成.同时可以解决某些特殊要求的反应条件,因而在炼钢生产中受到愈来愈多的重视和广泛的应用.本文探讨了(1)对5t电弧炉和30t氧气转炉钢液采用钢包喷吹脱硫的试验结果.(2)在还原气氛条件下采用喷吹熔剂方法更多还原

【Abstract】 The practical application of injection metallurgy to desulphurization and dephosphorization is discusscd in the paper. Steels containing less than 0.005% sulphur were produced by using Ladle-Injection-Dcsulphurization method in ladles with the melts from experimental 3 metric ton electric arc furnace and industrial 30 metric ton LD converter separately.Effects of processing factors on desulphurization were discussed, including oxygcn contcnt in steel mclts, conditions for melting slags, inserting depth of the injection lance and ladle lining, etc.The observations of the morphological change of non-metallic inclusions after calcium-treatment determined that the inclusions were fine-dispersed and most of them were spheroidal forms. SEM and quantitative metallography were employed to analyse the inclusions and mechanical properties of the steel were correspondingly improved.Introductions were also made on the method of powder-injection under reduction atmosphere which efficiently dephosphorizes the melt containing minimum 13% Cr without any oxidation.Through the applications in five and fifteen ton melts, IRD proved to be successful in the making of stainless steels with high-phosphorus scrap returns.The basic principles of dephosphorization under reduction atmosphere are discussed in connection with thermodynamic and kinetic factors. Under certain conditions, the reaction of calcium with phosphorus produces calcium phosphide and eliminates by the reaction 3 {Ca}+2[P]——（Ca₃P₂）. Injection metallurgy promotes the industrial application of the reaction.It is considered that the applicaton of the injection metallurgy is a promising way for improvement of steel quality both by dephosphorization and desulphurization and injection metallurgy will be widely applied.更多还原