Phosphorus Partition and Phosphate Capacity of TiO2 Bearing Basic Oxygen Steelmaking Slags

Authors

Phillip Drain, University of WollongongFollow
Brian J. Monaghan, University of WollongongFollow
Raymond Longbottom, University of WollongongFollow
Michael W. Chapman, BlueScope Steel Limited, University of WollongongFollow
Guangqing Zhang, University of WollongongFollow
Sheng Chew, BlueScope Steel Limited, University of WollongongFollow

RIS ID

136388

Publication Details

Drain, P. Brian., Monaghan, B. Joseph., Longbottom, R. James., Chapman, M., Zhang, G. & Chew, S. (2019). Phosphorus Partition and Phosphate Capacity of TiO2 Bearing Basic Oxygen Steelmaking Slags. ISIJ International, 59 (5), 839-847.

Abstract

The phosphorus partition (L_P) and phosphate capacity (C_PO3-4)were measured for TiO₂ bearing basic oxygen steelmaking slags in the CaO–SiO₂–MgO–Fe_tO–(TiO₂–MnO–Al₂O₃–P₂O₅) system at 1650°C. The effect of slag and metal additions were tested by varying the TiO₂ content from 0.0 to 18.0 mass% and the [Ti] content from 0.009 to 0.301 mass%. A recently published L_P model was used to assess the experimental L_P data using the measured slag composition and temperature. Experimental L_P data from this study and literature data were used to modify the published model to include titania. Increasing the TiO₂ concentration of the slag was found to decrease the L_P and C_PO3-4 of basic oxygen steelmaking (BOS) slags. Capacity values in the range of 2.2×10¹⁶ to 1.5×10¹⁸ at 1650°C were obtained. An empirical model for determining C_PO3-4 was developed for BOS slags using a large dataset of published slag and pO₂ data for relevant slag systems, including published data for titania bearing slags. The predicted C_PO3-4 from the empirical model was found to agree with the experimentally determined C_PO3-4 data from this study.

Grant Number

ARC/IH130100017