Preparation of High Performance Grccn Alumina Ceramic Balls by Roller Production Waste

To reuse roller waste as a raw material of high performance green ceramic balls, three kinds of white alumina ceramic balls whose wear resistance were 2-3 times of the best high alumina ceramic ball with 90% Al2O3 were prepared, and the Al2O3 content of the prepared balls was 75%. It is found that the effect of calcia and magnesia on the wear resistance of ceramic balls is contrast to the accepted one： the wear rate of the ceramic balls prepared in CaO-Al2O3-SiO2 system is the lowest and the wear rate of the ceramic balls prepared in MgO-Al2O3-SiO2 is the highest. The main crystal phase of the ceramic ball is mullite and corundum. The ceramic ball granular is uniform and fine with 4-5 μm average size. The pore diameter is about 2 μm. The wear way of the ceramic balls is mainly transcrystalline fracture.

工艺条件对用辊棒废料制备的中铝瓷球显微结构及性能的影响

以辊棒废料为主要原料,在CaO-MgO-SiO2-Al2O3体系中,研究烧结温度、保温时间、成型方式和压力大小对中铝瓷球显微结构及性能的影响规律及其机理。结果表明:在150MPa等静压成型,1330oC烧结,保温3h的工艺条件下,研制含铝量小于60%的中铝瓷球的性能最优异,磨损率为0.0503%/h,密度为3.1062g/cm3,与市售90瓷球相比,磨损率与之持平,白度与市售90瓷球不相上下。

回收耐火材料废料制备高性能中铝瓷球的研究

以硅酸铝及刚玉质耐火材料废料为原料,采用可塑成型和低温快烧工艺,在CaO-MgO-SiO2-Al2O3体系中,研制一种含铝量低于60%,以莫来石、刚玉为主晶相的高性能中铝瓷球。其磨损率是成分相近的中低档研磨介质的1/2￣1/5,与国内高铝冷等静压成型瓷球的最高水平持平,与国际高铝冷等静压成型瓷球最高水平接近。由于研制工艺模仿工业生产,故易于应用到建筑卫生陶瓷的工业生产中,实现此类瓷球以高质量,低成本的工业化生产及此类废料的再生利用。

BaO对中铝瓷球性能的影响研究

以辊棒废料为主要原料,在CaO -BaO -SiO2 -Al2 O3 体系中,采用常压低温快烧工艺,研制出含铝量小于6 0 %的高性能中铝瓷球,通过XRD、SEM和各项性能的测试分析,讨论了BaO相对MgO而言对中铝瓷球的性能影响。结果表明:其磨损率为0 .0 4 37% /h ,密度为3.1 731g/ ,与CaO -MgO -SiO2 -Al2 O3 体系中在相同条件下研制的中铝瓷球和市售90瓷球相比,磨损率降低了1 3.80 6 7% ,密度比MgO系提高了2 .0 88% ,白度与它们相近。