Abstract:Metallized pellets were produced from Jarosite residue by direct reduction of carbon-containing pellets. Second zinc oxide and lead were recovered from flue gas. Iron concentrate Ⅰ was produced from metallized pellets by grinding and magnetic separation. Iron concentrate Ⅱ was obtained from iron concentrate Ⅰ by reverse flotation process of floating silicon and inhibition of iron. The results show that metallization rate is 98.47%, and volatilization rate of zinc and lead is 98.54% and 86.25% respectively under the optimum conditions including basicity of 2.5, n(C)/n(O)=1.4, reduction temperature of 1 300 ℃, and reduction duration of 30 min. Iron grade in concentrate Ⅰ is 46.66% with iron recovery of 79.79% by magnetic field intensity of 159.2 kA/m. Iron grade in concentrate Ⅱ is 60.30%.