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![]() The first cement ring silo was built in 1979 for WÜLFRATHER ZEMENT GMBH on the site of the Thyssen Steelworks in Duisburg - Schwelgern. Two different types of slag cement had to be stored and handled in one silo with exactly the same outside dimensions as that of an existing silo. IBAU presented the solution of this problem: The ring silo was born.. |