Cr_2O_3-Al_2O_3砖中不同组成Cr_2O_3-Al_2O_3电熔颗粒料的抗侵蚀研究  

Corrosion resistance of fused Cr_2O_3-Al_2O_3 grains materials with different compositions in Cr_2O_3-Al_2O_3 bricks

作　　者：王晗[1] 兰河清[2] 耿可明[1] 吕世坪[1] 方旭[1] 

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司河南省特种耐火材料重点实验室,河南洛阳471039 [2]宝山钢铁股份有限公司,上海200941

出　　处：《耐火材料》2010年第6期442-446,共5页Refractories

摘　　要：首先以不同比例的铬绿和氧化铝粉电熔制得Cr2O3质量分数分别为15%、40%、50%、60%、85%、99%的6种Cr2O3-Al2O3电熔颗粒料（其编号依次为CR15、CR40、CR50、CR60、CR85和CR99）,然后采用回转渣蚀法研究了此电熔颗粒料（4~1 mm）的抗侵蚀性。结果显示：电熔颗粒料的抗侵蚀性随Cr2O3含量的增加及颗粒尺寸的增大而增强;高Cr2O3含量的CR99、CR85颗粒料在渣面层被侵蚀,主要是渣中的FeO和Al2O3对颗粒料的侵蚀,FeO与骨料中的Cr2O3反应,首先形成（Fe,Cr）3O4尖晶石,再与其他物相反应形成了复合尖晶石,当FeO耗尽后,渗入到颗粒内的Al2O3开始和Cr2O3反应,在颗粒表面形成铝铬固溶体;CR60颗粒料在渣面层和渗透层都存在侵蚀,渗透层的侵蚀主要是CaO、SiO2对颗粒料中铝铬固溶体中Al2O3的熔蚀,形成钙长石、钙黄长石以及玻璃相;Cr2O3含量较低的CR50、CR40、CR15颗粒料在渗透层内的侵蚀机制和CR60颗粒料的相同。Six kinds of Cr2O3-Al2O3 fused grains materials（the mass percent of Cr2O3 was 15%,40%,50%,60%,85%,and 99%,respectively） were prepared using chrome green and Al2O3 powder as starting materials by electrofusion,named as CR15,CR40,CR50,CR60,CR85,and CR99,respectively.The corrosion resistance of the six kinds of materials（4-1 mm） was studied using rotary slag corrosion method.The results show that：（1）the corrosion resistance of the fused grains materials increases with the Cr2O3 content and the grain size increasing;（2）the grains of CR99 and CR85 with higher Cr2O3 content are corroded at the slag surface layer,because FeO and Al2O3 in the slag corrode the grains;the FeO reacts with Cr2O3 in aggregates forming（Fe,Cr）3O4 spinel firstly,and then reacts with other phases forming composite spinel;when the FeO is fully consumed,the Al2O3 penetrated into the grains reacts with Cr2O3 forming Al2O3-Cr2O3 solid solution on the grains surface;（3）for CR60,the corrosion exists both in the slag surface layer and the penetration layer,in the penetration layer,the CaO and SiO2 react with the Al2O3 in Al2O3-Cr2O3 solid solution forming anorthite,gehlenite,and glass phase;the grains of CR50,CR40,CR15 have the same corrosion mechanism with CR60 in the penetration layer.

关 键 词：高铬耐火材料 Cr2O3-Al2O3电熔颗粒料 回转渣蚀法 侵蚀机制 

分 类 号：TQ175.79[化学工程—硅酸盐工业]