液态高铅渣直接还原炉内铬镁砖侵蚀研究  

CORROSION OF MAGNESIA-CHROME BRICK IN MOLTEN RICH-LEAD SLAG DIRECT REDUCTION FURNACE

作　　者：王延飞[1] 樊刚[1] 魏昶[1] 邓志敢[1] 李卫峰 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]河南豫光金铅股份有限公司,河南济源454650

出　　处：《矿冶》2015年第4期49-54,共6页Mining And Metallurgy

基　　金：国家高技术研究发展计划(2011AA061002);国家重点基础研究发展计划(2014CB643404)

摘　　要：通过液态高铅渣直接还原炉内侵蚀铬镁耐火砖的物理性能检测、化学成分分析以及SEM扫描电镜和EDS能谱检测分析,研究了在高温、强还原性气氛和碱性炉渣等熔炼环境下,还原炉内不同区域铬镁耐火砖的破坏机理。研究发现,液态高铅渣直接还原炉渣线区耐火砖表面损毁主要由熔渣氧化物侵蚀引起;熔池区耐火砖表面为熔渣侵蚀,没有明显的过渡带;高温还原性气体沿耐火砖显气孔进入耐火砖内部是导致炉顶区耐火砖表面结构变疏松的主要原因。通过化学成分以及晶体结构检测分析,发现铅、铜和砷等金属渗透引起的结构性破坏是造成渣线区和熔池区铬镁耐火砖损坏的主要因素;耐火砖内铁氧化物组分被还原引起的结构改变是导致炉顶区耐火砖结构疏松的主要因素。We study the damage of the magnesia-chrome brick in molten rich-lead slag direct reduction furnace at the high temperature, strong reducing atmospheres and basic slag by physical properties testing, chemical com- position analysis, SEM examination and Energy-Dispersive Spectrometer （EDS）. It was found that the slag oxida- tion erosion is responsibility for the slag line area brick surface damage, molten slag erosion is the main reason for the molten pool area brick surface damage, and there is no obvious transition zone; and high temperature reducing gas along the firebrick show porosity into the brick inside throat area is the main cause of the brick surface structure becoming loose. Through the analysis of the chemical composition and crystal structure detection, it was found that the structural damage caused by osmosis of the metal elements such as lead, copper and arsenic is the major factor of the damage to the magnesia-chrome brick at the slag line and the molten. The structures change caused by the reduction reactions of iron oxide is the major factor of loose structure to the magnesia-chrome brick at the top of fur- Race.

关 键 词：液态高铅渣 铬镁砖 侵蚀 直接还原炉 

分 类 号：TF806.2[冶金工程—有色金属冶金]