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1·It is studied on extracting alumina from fly ash by the way of limestone sinter and self powdering, discusses the influence of the sintered conditions of powder on alumina leaching.

采用石灰石烧结熟料自粉化方法对从粉煤灰中提取氧化铝进行了研究，系统探讨了熟料烧成条件对氧化铝溶出率的影响。

2·Available standard MA-spinel bricks differ mainly in the type of magnesia and in the amount and type of their alumina carrier (sintered and fused MA-spinel, calc. alumina, white fused alumina, etc. )

目前各种标准的镁铝尖晶石砖主要在氧化镁的数量、种类和它们铝载体的种类（烧结和电熔镁尖晶石、钙，氧化铝，白电熔等）方面有很大的不同。

3·Ash content of the additions is close to zero, therefore organic additions can't influence on the structure and property of sintered high-alumina ceramic material.

因为有机添加物的灰份接近于零，用它们增塑时，不会影响高铝瓷烧结后的结构与性质。