MgO-MgAl204 specimen,MgO-ZrO2 specimen,and MgO-MgAl204-ZrO2 specimen were prepared using magnesite powder (d50=6.62μm),m-ZrO2 micropowder (d50=3.99μm) and α-Al203 micropowder (d50=1.89 μm) as starting materials by semi-dry pressing and firing at 1 600 C 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 MgOMgAl2O4 material and MgO-MgAl2O4-ZrO2 material; (2) when adding ZrO2 into MgO-MgAl204 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.%以菱镁矿粉(d<,50>=6.62 μm)、m-ZrO<,2>微粉(d<,50>=3.99μm)、α-Al<,2>O<,3>微粉(d<,50>=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-MgAl<,2>O<,4>、MgO-ZrO<,2>和MgO-MgAl<,2>O<,4>-ZrO<,2>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-ZrO<,2>材料的烧结性能优于MgO-MgAl<,2>O<,4>材料及MgO-MgAl<,2>O<,4>-ZrO<,2>材料;2.在MgO-MgAI<,2>O<,4>材料中引入ZrO<,2>,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Fe<'3+>和Mg<'2+>的渗透有关;3)试验结果与热力学模拟结果吻合较好.
展开▼
