摘要
硫是钢铁中的有害元素,为降低高炉硫负荷,希望在烧结工序尽可能地脱出原料中的硫,从而为降低铁水含硫和冶炼节焦创造条件。然而,影响烧结脱硫的因素很多,且受高炉炉料结构制约。攀钢钒钛磁铁精矿含硫高达0.7%,烧结料含硫达5.0 kg/t,以易于脱出的黄铁矿或磁黄铁矿形态存在。但近年来,随着配矿结构与工艺制度的变化,特别是烧结矿碱度与生石灰用量增加,烧结矿残硫逐年上升,高炉硫负荷增加,生铁含硫上升,增加了炼钢成本。通过对脱硫机理及其影响因素进行分析,认为控制工艺参数和烧结料成分是可以降低烧结矿残硫的。在此基础上提出了脱硫的措施与对策,以期为进一步提高脱硫率提供指导。
Sulfur is a harmful element in the iron and steel,in order to reduce the blast furnace sulfur load,it is expected to remove the sulfur in the raw materials as far as possible in the sintering process, with the purpose of creating conditions for reducing sulfur content of molten iron and saving smelting coke consumption. However, the sintering desulfurization was affected and restricted by many factors including blast furnace burden structure. The sulfur content of Pansteel vanadium titanium magnetite concentrate is as high as 0.7% ,the sulfur content of sintering mixture is as high as 5.0 kg/t,but the sulfur exists in the form of pyrite or pyrrhotite which is easy to be removed. In recent years, with the change of proportioning structure and process system,especially with the increase of the sinter basicity and quicklime consumption, the residual sulfur in sinter rises every year, the blast furnace sulfur load increases, the sulfur content of pig iron rises, and thus the steelmaking cost increases. Through the analysis of desulfurization mechanism and its influencing factors,it is considered that controlling process parameters and sintering material components can reduce the residual sulfur in the sinter. And based on this, the measures and countermeasures of desulfurization were given so as to guide further improvement of sintering desulfurization rate.
出处
《烧结球团》
北大核心
2012年第6期60-65,69,共7页
Sintering and Pelletizing
关键词
钒钛磁铁精矿
烧结脱硫
脱硫机理
影响因素
工艺制度
措施
vanadium titanium magnetite concentrate
sintering desulfurization
desulfurization mechanism
influencingfactors
process system
measures
