摘要
日钢高炉高铝矿冶炼过程中,面临烧结矿的软熔性能变化大,炉渣熔化温度及黏度上升等问题。为此,采取一系列优化措施:①不同矿种优化搭配,烧结矿加块矿,槽下高、低碱度烧结矿块矿混匀,改善炉料软熔性能;②在厚焦层基础上探索合适矿层厚度,适当减薄矿层,炉腰矿层厚度维持在0.35m左右,以利于改善矿石熔化性,增强炉况抗波动能力;③提镁降钙,优化渣相,二元碱度控制在1.25,(MgO)<15%,镁铝比维持在0.75左右,保证炉渣的流动性和稳定性。采用以上措施后,日钢高炉炉况顺行,抗波动能力增强,燃料消耗长期维持在较低水平。
The softening-melting performance of sinter charged to Rizhao Steel BF varies greatly,and slag melting temperature and viscosity go up while the furnace is operating with high-alumina iron ore.Thus,some optimization measures are taken,which include:(1)optimizing the blending recipe of different types of ores,such as mixing sinter with lump ore and blending sintered lump ores of high and low alkalinity under bin to improve the softening-melting performance of the charges;(2)figuring out the appropriate thickness of ore layer on the basis of adopting thick coke layer,for example,reducing the ore layer thickness moderately and keeping the ore layer thickness of belly at about O.35m so as to improve the ore melting process and enhance the tolerance for fluctuated furnace condition;(3)increasing the magnesium content and decreasing the calcium content to optimize the slag phase with the binary basicity controlled at 1.25,MgO<15%and magnesium-aluminum ratio kept at about 0.75 for ensuring the slag fluidity and stability.Thanks to the above measures,the furnace achieves smooth running,higher tolerance for fluctuated furnace condition,and long-term lower fuel consumption.
作者
罗力
张强
常凯
LUO Li;ZHANG Qiang;CHANG Kai(Ironmaking Department,Rizhao Steel Holding Group Co.,Ltd.,Rizhao 276800,Shandong,China)
出处
《炼铁》
CAS
北大核心
2024年第1期33-38,共6页
Ironmaking
关键词
高炉
高铝矿
软熔性能
矿层厚度
镁铝比
blast furnace
high-alumina iron ore
softening-melting performance
ore layer thickness
magnesium-aluminum ratio
