|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals and Materials 2021
||Effects of K2O Addition on the Reduction Smelting of Phosphorite for the Yellow Phosphorus Production
||Hongquan Jing, Yuan Yao, Cuihong Hou, Haobin Wang, Shouyu Gu
|On-Site Speaker (Planned)
Yellow phosphorus produced by electric furnace is an important raw material for the production of high-purity phosphorus fine chemicals. High temperature of the slag system for the smelting of phosphorite resulted in the energy-extensive consumption. Moreover, the low activity of slag led to the low utilization efficiency. In current study, the effects of K2O addition on the reduction smelting of phosphorite were investigated via thermodynamic calculations and experiment validation in order to reduce the smelting temperature and increase the activity of the slag. It’s found that K2O could reduce the melting temperature of SiO2-CaO-Al2O3 ternary system and increase the liquid phase formation. Higher phosphorus volatilization ratio over 97% was obtained when the phosphorite smelted at 1500 oC with binary basicity of 0.8 and 3wt.% K2O addition. Moreover, a K-bearing slag with high activity was obtained and it can be used as micronutrient fertilizer..