Effect of FeO content on melting characteristics and structure of nickel slag

Nickel smelting produces a large amount of nickel slag which contains lot Fe in the form FeO. The effect FeO content on melting properties and structure is investigated by thermodynamic calculations experiments, using water quenching furnace as raw material, simplified to CaO-SiO2-FeO-MgO system. results are follows: with increasing content, precipitated primary phase changes from melilite olivine. liquidus temperature, softening hemispherical flow viscosity, critical viscosity temperature system tend decrease gradually, but solid tends first then increase. centre symmetric stretching vibration band [SiO4]4 tetrahedron -in shifts low wavenumber region. mole fraction O0 continuously decreases, O- O2- increases. complex silicon-oxygen gradually disintegrates structural unit be simple.