首页|Effect of ferrotitanium slag on microstructure and properties of Al2O3-SiC-C castables for iron runner
Effect of ferrotitanium slag on microstructure and properties of Al2O3-SiC-C castables for iron runner
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Ferrotitanium slag(FS)is a waste slag produced during the smelting of ferrotitanium alloys by thermite reduction.Its alumina content is high and can be used as alumina raw material.Iron runner castables containing different amounts of FS were prepared and characterized.The results show that the introduction of FS is beneficial to the sintering of the castables sample.When the FS concentration is 11.2 wt.%,the aggregate and matrix of the castables sample have a good combination,and the mechanical strength of the Al2O3-SiC-C castable reaches a maximum at room temperature.How-ever,excessive introduction of FS generates a large amount of anorthite phase,which reduces the mechanical strength of the Al2O3-SiC-C castable at room temperature.In addition,the high-melting phase CaTiO3 is formed in FS,which has good mechanical properties.Meanwhile,the cracks of FS are reduced,and the combination between phases is closer,thus significantly improving the hot modulus of rupture of the castable.When the FS concentration is not above 33.6 wt.%,the castables show good slag resistance.The TiO2 in FS is transformed into TiC by carbothermal reaction,which is enriched at the boundary and prevents further reaction of the slag.
Ferrotitanium slagAl2O3-SiC-C castableHot modulus of ruptureSlag resistance
Tu Long、Hua-zhi Gu、Mei-jie Zhang、Ao Huang、Lv-ping Fu、Ding Chen、Wen-dong Qiu、Mao-qi Ju
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The State Key Laboratory of Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China
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