这是关于铁水预处理以获得低磷、硫铁水的方法。近年来,在钢铁工业范围内,为对付石油危机以来的变化形势,提倡节省资源,节约能源,严格要求钢材质量,以期开发更高效益的精炼工艺。这即是在炼钢全过程中节省资原和节约能源,降低成本,并确立新的高效脱磷、硫等杂质元素的技术。在这种背景条件下,对分解脱磷去硫等反应分步预处理,提高精炼效率的工艺进行了种种研究。本专利发明者迅速查明了预脱硅反应在冶金 This is about hot metal pretreatment in order to obtain low-phosphorus, pyritic water. In recent years, in the steel industry, in order to cope with the changes since the oil crisis, it has advocated saving resources, saving energy, and strictly demanding the quality of steel so as to develop more effective refining processes. This is the technology that saves capital and saves energy, reduces costs and establishes new and efficient dephosphorization and sulfur impurity elements in the whole process of steelmaking. Under such background conditions, various studies have been conducted on the technology of stepwise pretreatment such as decomposition of dephosphorization and desulfurization to improve the refining efficiency. The inventors of the present invention quickly identified the pre-desiliconization reaction in metallurgy