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In Situ Study on the Transformation Behavior of Ti-Bearing Slags in the Oxidation Atmosphere

  • Yongqi SunEmail author
  • Zuotai Zhang
Conference paper
Part of the The Minerals, Metals & Materials Series book series (MMMS)

Abstract

Rutile acts as a target phase for the titanium (Ti) recovery from Ti-bearing blast furnace slags (Ti-BFS) due to its special properties. In this study, using single hot thermocouple technique (SHTT), we investigated the crystallization behaviors of the Ti-BFS and the target rutile precipitation behaviors where both the holding temperature, the basicity (mass ratio of CaO to SiO2) and the P2O5 content were considered. We found that basicity has a vital influence on the crystallization behaviors and rod-like rutile only formed with lower basicity. As the basicity increased, the primary phase would transform from rutile to perovskite. As the basicity was 0.5, with the temperature increasing, the growth rate of rutile length initially increased, followed by a decrease with further increasing holding temperature. Thus, the growth rate of rutile had a maximum value of 7.74 µm/s at 1260 °C. Furthermore, the rutile growth followed a one-dimensional template, and the P2O5 content had an important impact. By increasing the content of P2O5, the incubation time of the rod-like rutile got decreased, suggesting that the rutile precipitation got much easier.

Keywords

Ti-bearing slags In situ study Crystallization behaviors Rutile Chemical modification 

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Copyright information

© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.School of Chemical EngineeringThe University of QueenslandBrisbane, St LuciaAustralia
  2. 2.School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhenPeople’s Republic of China

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