MgO-MgAl_2O_4-ZrO_2系材料的抗渣性研究  

Slag corrosion resistance of MgO-MgAl_2O_4-ZrO_2 series materials

作　　者：高杰[1] 李友胜[1] 韩兵强[1] 李楠[1] 

机构地区：[1]武汉科技大学耐火材料与高温陶瓷国家重点实验室培育基地,湖北武汉430081

出　　处：《耐火材料》2011年第1期18-22,共5页Refractories

摘　　要：以菱镁矿粉(d50=6.62μm)、m-ZrO2微粉(d50=3.99μm)、α-Al2O3微粉(d50=1.89μm)为原料,采用半干法成型,于1 600℃保温3 h烧成后制成MgO-MgAl2O4、MgO-ZrO2和MgO-MgAl2O4-ZrO2质试样,检测试样的加热永久线变化率、显气孔率、体积密度、抗渣侵蚀性、抗渣渗透性,并利用Factsage6.1热力学软件对试样的抗渣性进行了分析。结果表明:1)MgO-ZrO2材料的烧结性能优于MgO-MgAl2O4材料及MgO-MgAl2O4-ZrO2材料;2)在MgO-MgAl2O4材料中引入ZrO2,有利于提高其抗渣侵蚀性,但抗渣渗透性较差,主要同试样的组织结构相对疏松及熔渣中的Fe3+和Mg2+的渗透有关;3)试验结果与热力学模拟结果吻合较好。MgO-MgAl2O4 specimen,MgO-ZrO2 specimen,and MgO-MgAl2O4-ZrO2 specimen were prepared using magnesite powder（d50=6.62 μm）,m-ZrO2 micropowder（d50=3.99 μm） and α-Al2O3 micropowder（d50=1.89 μm） as starting materials by semi-dry pressing and firing at 1 600 ℃ for 3 h.The permanent linear change on heating,apparent porosity,bulk density,slag corrosion resistance,and slag penetration resistance of the specimens were determined.Slag resistance of specimens was analyzed using thermodynamic software Factsage6.1.The results show that：（1）MgO-ZrO2 material has better sintering ability than MgO-MgAl2O4 material and MgO-MgAl2O4-ZrO2 material;（2）when adding ZrO2 into MgO-MgAl2O4 material,the slag corrosion resistance is improved and the slag penetration resistance is poor,which is mainly resulted from relatively loose microstructure of the specimens and the penetration of Fe3＋ and Mg2＋ in the slag;（3）experimental results are in good agreement with thermodynamic simulation results.

关 键 词：热力学模拟 抗渣性能 MgO-ZrO2材料 MgO-MgAl2O4材料 MgO-MgAl2O4-ZrO2材料 CAZRO3 

分 类 号：TQ175.732[化学工程—硅酸盐工业]