煤渣中氧化铁对高铬砖使用的影响  

Analysis on the Influence of Iron Oxide in the Coal Slag on High Chrome Brick

作　　者：吕世坪[1] 李坚强[1] 王晗[1] 

机构地区：[1]中钢集团洛阳耐火材料研究院有限公司先进耐火材料国家重点实验室,河南洛阳471039

出　　处：《煤化工》2016年第4期41-43,48,共4页Coal Chemical Industry

摘　　要：分析了国内某企业德士古气化炉锥底渣口部位耐火砖使用寿命较短的原因,测试了该企业使用的不同产地煤种的煤灰化学成分及灰融熔性温度,并进行了静态坩埚抗渣试验。试验及测试结果表明:煤渣中氧化铁含量较高时,煤渣的灰熔融性温度降低,对耐火材料的渗透侵蚀严重,虽然能在渣与耐火材料界面处形成所谓的复合尖晶石保护层,但对耐火材料的寿命提高起不到明显的作用,反而会降低其使用寿命。The causes of short service life of high chrome brick for cone bottom of Texaco gasifier in an enterprise in China are analyzed. The chemical composition and ash melting point of coal ash for the coal from different places are tested and static crucible slag resistance tests are carried out. The analysis shows that the higher of iron content in the coal slag, the lower of ash melting point of coal slag, along with more severe of the penetration and erosion to refractories. Although a so-called composite spinel protective layer at the interface between slag and refractories can be formed, it will reduce the service life of high chrome brick instead of protection.

关 键 词：气流床气化 气化炉 煤渣 氧化铁 高铬砖 

分 类 号：TQ175.7[化学工程—硅酸盐工业]