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。
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. )
根据活性氧化镁经高温焙烧后具有很好的除磷效果，利用沸石做载体，将活性氧化镁负载在其上，进行除磷试验。
Active magnesium oxide has a good phosphorus removal effect, therefore, we use zeolite as carrier which is loaded on with active magnesium oxide for phosphorus testing.
根据活性氧化镁经高温焙烧后具有很好的除磷效果，利用沸石做载体，将活性氧化镁负载在其上，进行除磷试验。
Active magnesium oxide has a good phosphorus removal effect, therefore, we use zeolite as carrier which is loaded on with active magnesium oxide for phosphorus testing.
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