Research on Appropriate Additives of Recycling Ladle Lining Materials for Al₂O₃-SiC-C Iron Runner Castable

Abstract:

In this experiment, preparation of samples were based on original ratio of bauxite matrix Al₂O₃-SiC-C castable for iron runner, and partial bauxites of size 8-5 mm, 5-3 mm, 3-0 mm and <0.074 mm were replaced by the same size granular recycling Al₂O₃-MgO-C materials from spent ladle bricks, respectively. Si₃N₄ and B₄C were introduced as appropriate additives. Effects of their amount on the performance of Al₂O₃-SiC-C castable for iron runner were investigated by testing on physical properties and erosion resistance of the samples after sintering. The results showed that the introduction of Si₃N₄ and B₄C led to high temperature flexural strength of the recycled castable samples decline, while the right amount could improve the room temperature flexural and pressure strength along with the erosion resistance to blast furnace slag. When introduced 3% of Si₃N₄and 0.3% of B₄C respectively, the comprehensive performance of the samples were the best.

• Periodical: Advanced Materials Research (Volumes 750-752)
• Pages: 1184-1187
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.750-752.1184
• Online since: August 2013
• Authors: Li Ren Wang, Rong Lin Wang, Dong Mei Zhao, Yi Cui, Jing Long Bu
• Keywords: Si₃N₄, B₄C, Castable for Iron Runner, Ladle Lining, Recycling Materials

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