改进铁水镁脱硫聚渣剂聚集效果的试验

Research on Slag-conglomerating Agent of Pure Magnesium Desulphurization in Hot Metal

通过对某厂脱硫渣及聚渣剂的研究,发现其脱硫渣熔点高、呈颗粒散状分布于铁水表面;目前所使用的聚渣剂熔点高、粘度大,对脱硫渣的聚集效果不明显,导致脱硫后扒渣效果差,转炉回硫率高。针对这些问题,新设计了聚渣剂并进行实验室研究,确定聚渣剂的成分范围以及加入量的比例,获得较好的聚渣效果。

The physical and chemical properties of industrial desulfurizing slag and slag-conglomerating agent were studied in the present work.It was found that the desulfurizing slag has an exceptionally high melting temperature and is distributed widespread on the hot metal surface in granular forms,and industrial slag-conglomerating agent with high melting point and high viscosity.Therefore,it is difficult to remove desulphur ization slag by wiping of the slag from hot metal.In that case,resulphurization takes place in the LD process,especially in ultra-low sulphur steel production.According to the characteristics of industrial slag-conglomerating agent,slag-conglomerating agent with low meting point and high viscosity was developed.The results show that：the ratio is 2∶5,which can be able to play a very good effect of conglomerating slag.