PRECIPITATION AND GROWTH OF PEROVSKITE PHASE IN TITANIUM BEARING BLAST FURNACE SLAG
来源期刊：Acta Metallurgica Sinica2007年第1期
论文作者：T.P. Lou Z.T. Sui L.N. Zhang L. Zhang Z.Z. Guo
Key words：perovskite phase; Ti-bearing blast furnace slag; precipitation; additive agent;
Abstract: The effects of transformation of slag composition and additive agents on the morphology, the crystal in the Ti-bearing blast furnace slags were investigated. As the morphology of perovskite is dispersed in molten slags, the crystal growth mechanism of the melting of fine dendrites and the coarsening of large grains exist throughout the solidification of molten slags. With the increase of CaO and Fe2O3 content, VF of perovskite obviously increases. However, high basicity leads to the viscosity of slag, which results in the reduction of the average equivalent diameter (AED). The experimental results showed that the presence of the additives CaF2 and MnO efficiently decreased the viscosity of the slags, and obviously improved the morphology of perovskite and promoted its growth.
T.P. Lou1，Z.T. Sui1，L.N. Zhang1，L. Zhang1，Z.Z. Guo1
(1.School of Materials and Metallurgy, Northeastern University, Shenyang 110006, China)
Abstract:The effects of transformation of slag composition and additive agents on the morphology, the crystal in the Ti-bearing blast furnace slags were investigated. As the morphology of perovskite is dispersed in molten slags, the crystal growth mechanism of the melting of fine dendrites and the coarsening of large grains exist throughout the solidification of molten slags. With the increase of CaO and Fe2O3 content, VF of perovskite obviously increases. However, high basicity leads to the viscosity of slag, which results in the reduction of the average equivalent diameter (AED). The experimental results showed that the presence of the additives CaF2 and MnO efficiently decreased the viscosity of the slags, and obviously improved the morphology of perovskite and promoted its growth.
Key words:perovskite phase; Ti-bearing blast furnace slag; precipitation; additive agent;
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