Features of reduction of high-magnesia nickel ore of the serov deposit

Parameters of reducing the roasting of high-magnesia oxide nickel ore containing, wt %, 1.2 Ni, 0.026 Co, 17.0 Fe2O3, 4.0 Al2O3, 20.2 MgO, and 46.0 SiO2 are evaluated. The degrees of reduction and metallization upon heating the ore with the reducing agent in the range t = 800−1250°C and the sizes of metallic inclusions forming in the course of the process are determined. To separate the phases, the magnetic separation of reducing products at H = 40 and 80 kA/m is used. The best characteristics are attained upon roasting the ore with a reducing agent and a sulfidizing agent at t = 1300°C. In this case, the magnetic fraction contains 7.1% Ni, while the nonmagnetic one contains 0.18% Ni.