Abstract
Cr is an important alloying element for metal materials. Thermodynamic behaviors of Cr in metal and slag phase are basic knowledge for enhancing its yield ratio in pyrometallurgy process. In this research, laboratory experiments on distribution ratios of Cr between slag (CaO-SiO2-Al2O3sat-CrOx, CaO-SiO2-MgOsat-CrOx, and CaO-SiO2-Al2O3-MgOsat-CrOx) and Fe-C(-Si/Al)-Cr metal phase were carried out under 1500°C–1600°C by using gas-slag-metal equilibrium method. The effects of influencing factors such as slag compositions, temperature, and metal melt compositions were examined. The results suggested that the distribution ratio of chromium between slag and metal phase increased with increasing the carbon and silicon contents in metal phase; Aluminum can reduce some silicon oxides into silicon in metal melt, which further promote the reduction of chromium oxides into metal phase. And the basicity, along with Al2O3 content in slag also gave important influence on LCr.
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