2016 Volume 56 Issue 12 Pages 2156-2160
The effects of minor elements TiO2, MnO, Na2O, K2O, CaS, and B2O3 to the liquidus temperatures of blast furnace slags were experimentally studied. The base blast furnace slag composition in SiO2–Al2O3–CaO–MgO system is fixed at CaO/SiO2=1.1, 16 wt% Al2O3 and 8 wt% MgO. The liquidus temperatures of the synthetic slags have been determined by high temperature equilibration, quenching and Electron Probe X-ray Microanalysis (EPMA) techniques. It was found that within the present investigated composition ranges, the additions of minor elements to the BF slags remain in melilite primary phase field. The minor element decrease the liquidus temperatures of the blast furnace slags in different extents and follows the tendency: B2O3 > CaS > Na2O > K2O > “TiO2” > MnO. The present measurements were also compared with FactSage predictions.