Ghosh, Arup and Haldar, Manas Kamal and Das, S K (2007) Effect of MgO and ZrO2 additions on the properties of magnesite-chrome composite refractory. Ceramics International, 33 (5). pp. 821-825. ISSN 0272-8842

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Magnesite-chrome aggregates have been prepared from friable chrome ore and magnesia of different reactivity in the presence of an additive, ZrO2. Two types of batch compositions using sintered magnesia, caustic magnesia and chrome ore have been selected for preparing mag-chrome composites. The batch consisting of sintered magnesia and friable chrome ore (SMC) was vibromilled for 8 h, whereas caustic magnesia compositions were added directly to a vibromilled chrome ore (CMC) and mixed in a fluidized bed mixer. Additions of 1-5 wt.% ZrO2 were made to the batches. Firings were carried out between 1700 and 1750 degrees C with 2 h soaking. Aggregates were characterized by evaluating densification, hot modulus of rupture and microstructure. The reactivity of magnesia was found to play an important role in the final properties of samples. Introducing less reactive sintered magnesia improved all the properties of the aggregates. ZrO2 was found to be a good sintering aid in the magnesite-chrome composites. (c) 2006 Elsevier Ltd and Techna Group S.r.l.

Item Type: Article
Subjects: Refractories
Engineering Materials
Depositing User: Namita Dutta
Date Deposited: 23 Jan 2012 12:55
Last Modified: 16 Jul 2015 12:07

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