摘要
由于对耐火材料的侵蚀性较低且容易保存,铝酸钙精炼渣越来越多的被应用到RH炉脱硫工艺中。为了追求更好的脱硫效果,本文建立一种铝酸钙脱硫剂在RH炉过程脱硫反应的预测模型,并对模型进行了验证。验证结果显示,模型的拟合相关系数为0.99,拟合度非常好。模型的参数值,可以通过生产试验数据获得。模型分析认为,RH精炼脱硫主要由有效脱硫时间决定,有效脱硫时间即为脱硫终止时间与有效渣量形成的熔化时间的差值。当熔渣的熔化速度很低时,有效脱硫时间几乎等于零,则脱硫不发生。进一步的,利用该模型对RH炉脱硫工艺操作调整进行了模拟。模拟结果表明,总加入量不变时,分批次加入可以提高脱硫率,且存在最优的批次数和单批次加入量。
Calcium aluminate flux is applied to RH desulphurization process protecting the refractories due to Fluoride free and easy storage condition request.In order to pursuit better effect of desulphurization,a new desulphurization model was constructed in this paper.The model was established and proved as the correlation co-efficient equals 0.99.The values of the parameters could be got from the practice data of RH desulphurization.It could be concluded from the model that the process is decided by the effective time of desulphurization,which means terminal time of desulphurization minus the time reaching the critical liquid slag volume.The worst situation is when the melting speed of flux is too low to reaching the critical liquid slag volume,no desulphurization happens.For further steps,the model was used to simulate the operation optimization,which revealed that double-addition is better than single addition when the total volume of flux equals,but that doesn’t mean the more times of addition are better,however,the best addition times could be calculated by the model.
作者
陈玉鑫
孙亮
陈峰
曹仁峰
CHEN Yuxin;SUN Liang;CHEN Feng;CAO Renfeng(IMERYS(CHINA)Co.,Ltd.,Beijing 100028,China;Steel Dept.,Beijing Shougang Holdings Co.,Ltd.,Tangshan 064404,China)
出处
《电工钢》
2021年第5期42-48,共7页
ELECTRICAL STEEL
关键词
RH
精炼渣
硅钢
脱硫模型
RH
refining flux
silicon steel
desulphurization process model
