论文部分内容阅读
为满足用户对无取向电工钢中硫含量的要求,采用CaO-CaF2复合渣系为脱硫剂,利用RH投入法对无取向电工钢进行深脱硫试验。试验结果表明,RH精炼渣成分控制在w CaO43%~51%、w Al2O325%~31%、w MgO4%~6%、w SiO29%~12%、w(FeO+MnO)3%~6%,在脱硫剂加入量为6~8 kg/t时,钢中平均硫含量从32×10-6降低到18×10-6,RH平均脱硫率为43.3%,最高达47.1%。利用KTH模型计算精炼终渣平均硫容量为0.003 1,RH精炼结束时渣-钢间实际平均硫分配比从14增加到52。
In order to meet the user requirements for sulfur content in non-oriented electrical steel, the CaO-CaF2 composite slag system was used as desulfurization agent, and the deep desulfurization test of non-oriented electrical steel was carried out by RH input method. The results show that the composition of RH refining slag is controlled between 43% ~ 51% of w CaO, 25% ~ 31% of w Al2O3, 4% ~ 6% of w MgO, 29% ~ 12% of w SiO and 3% ~ 6% of w (FeO + When the amount of desulfurization agent is 6 ~ 8 kg / t, the average sulfur content in steel decreases from 32 × 10-6 to 18 × 10-6. The average desulfurization rate of RH is 43.3% and the maximum is 47.1%. The average final sulfur content of the final slag was calculated as 0.003 1 using the KTH model. The actual average sulfur distribution ratio between slag and steel increased from 14 to 52 at the end of RH refining.