利用提钛尾渣制备六铝酸钙-镁铝尖晶石多孔材料  

Porous ceramics of calcium hexaluminate-magnesia alumina spinel prepared by titanium recovering slag

作　　者：李胜[1] 李友胜[1] 李鑫[1] 柯昌明[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》2010年第2期100-103,共4页Refractories

基　　金："十一五"国家科技支撑计划项目(2006BAB02B02)

摘　　要：以攀钢提钛尾渣(≤0.088mm)和工业氧化铝(d50=8.79μm)为原料,采用浇注成型制备出六铝酸钙-镁铝尖晶石多孔材料,研究了烧成温度和尾渣加入量对六铝酸钙-镁铝尖晶石材料的性能和显微结构的影响。结果表明:(1)随烧成温度的升高和尾渣加入量的增大,材料体积密度和耐压强度逐渐增大。(2)1550℃烧后材料中六铝酸钙的相对生成量最大;当提钛尾渣与工业氧化铝的质量比为30:70时,1500℃烧后材料中主晶相为六铝酸钙和镁铝尖晶石;其质量比为35:65时,除了六铝酸钙和镁铝尖晶石外还残留有少量的二铝酸钙。(3)SEM分析发现镁铝尖晶石弥散分布在六铝酸钙中,六铝酸钙晶体呈较厚的板片状;材料的孔径主要集中在1～3μm,平均孔径和体积中位径分别为1.75和1.39μm。Porous ceramics of calcium hexaluminate-magnesia aluminia spinel were prepared using industrial alumina（d50=8.79 μm）and titanium recovering slag（≤0.088 mm）of Panzhihua Steel as starting materials by casting.Influences of firing temperature and addition of titanium recovering slag on microstructure and properties of porous CA6-MA ceramics were studied.The results show that：（1）bulk density and cold crushing strength of specimens increase gradually with the increase of firing temperature and titanium recovering slag addition;（2）relative forming amount of CA6 in specimens reaches the top at 1 550 ℃;when the mass ratio of titanium recovering slag and industrial alumina is 30：70,main crystal phases of specimens fired at 1 500 ℃ are CA6 and MA,however when that is 35：65,there is a spot of CA2 besides CA6 and MA;（3）SEM analysis shows MA disperses in CA6 appearing to be thick sheets.Pore diameter of specimens is mostly in 1-3 μm,and average pore diameter and volume medium diameter are 1.75 and 1.39 μm,respectively.

关 键 词：提钛尾渣 六铝酸钙 镁铝尖晶石 多孔材料 显微结构 

分 类 号：TQ175.713[化学工程—硅酸盐工业]