The quality is a burnt magnesia spinel brick made from fused magnesia, low iron sintered magnesia and fused hercynite. This synthetic hercynite is a patent by RHI Refractories.
By using fused magnesia and sintered spinel as main materials and sulphite liquor as binders, magnesium compound side gate was researched.
以优质电熔镁砂、烧结镁铝尖晶石为主要原料，采用纸浆废液作为结合剂研究镁质复合滑板材料。
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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. )