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本文开发了一种预熔型精炼合成渣,具有高碱度低熔点的特性,实验室条件下,平均脱硫率为84.5%.在工业实验中,根据钢种出钢要求,设计了分钢种的加料方案.实验结果表明,本精炼渣可以达到100%出钢化渣率,精炼时间缩短了11min.与原工业渣系相比,使用本精炼渣后,VD前钢中氧和氮含量分别降低了7×10-6和12×10-6,VD后钢中氧和氮含量分别降低了5×10-6和15×10-6.脱硫率也得到了大幅提高,从电炉出钢至VD后吊包的脱硫率为92%,最低硫含量达到30×10-6.
In this paper, a kind of premelted refining slag was developed with the characteristics of high alkalinity and low melting point, and the average desulfurization rate was 84.5% under the laboratory conditions.In the industrial experiment, according to the steel tapping requirements, Of the feed program.The experimental results show that the refining slag can reach 100% tap slag rate, the refining time is shortened 11min. Compared with the original industrial slag system, the use of the refining slag, VD before the steel oxygen and nitrogen content decreased 7 × 10-6 and 12 × 10-6, respectively, the contents of oxygen and nitrogen in steel decreased by 5 × 10-6 and 15 × 10-6, respectively. The desulfurization rate has also been greatly improved, from tapping to VD After the bag desulfurization rate of 92%, the minimum sulfur content of 30 × 10-6.