颗粒镁铁水脱硫率与镁利用率研究

通过对宣钢脱硫站77组生产数据进行多元线性回归得到了在单吹颗粒镁铁水脱硫时吨铁镁的消耗xMg(kg/t)、喷吹时间t(s)、铁水初始硫含量[%S]0、脱硫量xS、铁水温度T(K)和吨铁镁粒的喷吹速率VMg与脱硫率和镁的利用率的数学模型.通过对数学模型的研究发现:脱硫率随吨铁镁耗量、初始硫含量的增加而增加,随喷吹时间、温度和镁喷吹速率的增大而降低.镁利用率随吨铁镁耗量、喷吹时间及喷吹速率的增加而减少,随喷吹时间的延长、镁喷吹速率、铁液中初始硫含量及温度的升高而升高.在合适的吨铁镁消耗量的情况下,要提高脱硫率和镁利用率,应该在保障脱硫时间的前提下,降低吨铁镁喷吹速率,减少喷吹时间.

Desulfurization rate and particle magnesium utilization rate in hot metal pretreatment

The feasibility of desulfurization by particle magnesium in hot metal pretreatment was expoundedthrough calculation in thermodynamics and dynamics. Based on 77 group data of desulfurization process in thdesulfurization station of Xuanhua Iron and Steel Group Co. Ltd., a mathematics model about desulfurization ratand magnesium utilization rate was obtained. The above model is in favor of the optimization of process iXuanhua Steel Plant and it increases the utilization rate of particle magnesium, decreases the consumption of particle magnesium, and saves the cost. To improve the desulfurization ratio of desulfurizer and utilization ratio, thtemperature of hot metal and the mass of particle magnesium should be improved, and the injection speed odesulfurizer and the blowing time should be declined.