半钢炼钢条件下转炉护炉技术探讨

Discussion on Converter Protecting Technology under Semi-steel Steelmaking Condition

钒钛磁铁矿经过高炉炼铁得到含钒铁水,转炉炼钢时利用碳与钒的选择性氧化,将铁水中的钒富集后进入炉渣,然后从钒渣中提取钒,是目前国内主流的提钒方法。含钒铁水的冶炼,转炉的成渣条件及渣相与常规铁水冶炼差异较大,对护炉技术提出挑战,因此掌握半钢炼钢条件下转炉护炉技术,在生产过程中才能不影响生产组织,保证一座提钒转炉对应两座半钢冶炼转炉的顺行。本文基于半钢炼钢条件下钒渣与钢渣的成分和岩相结构分析研究的基础上,总结了影响转炉护炉的主要因素,针对性的提出改进措施,在某厂半钢炼钢条件下,转炉护炉取得了较好的冶金效果。

Vanadium titanium magnetite is used to obtain vanadium containing molten iron through blast furnace ironmaking.During converter steelmaking,selective oxidation of carbon and vanadium is utilized to enrich the vanadium in the molten iron and enter the slag.Then,vanadium is extracted from the vanadium slag,which is currently the mainstream vanadium extraction method in China.The smelting of vanadium containing molten iron has significant differences in slag formation conditions and slag phase compared to conventional molten iron smelting,posing a challenge to furnace protection technology.Therefore,mastering the furnace protection technology under semi-steel steelmaking conditions can ensure the smooth operation of one vanadium extraction converter corresponding to two semi-steel smelting converters during the production process without affecting the production organization.Based on the analysis of the composition and petrographic structure of vanadium slag and steel slag under semi-steel steelmaking conditions,the paper summarizes the main factors affecting converter protection and proposes targeted improvement measures.Under semi-steel steelmaking conditions in one factory,converter protection has achieved good metallurgical results.