Abstract:Fused magnesium furnace applying copper-steel composite conductive arm has the problems of power dissipation, slow speed of electrode, and poor control performance. Solution to replace copper-steel composite conductive arm with aluminum conductive arm was put forward. Basic formula for accurate calculation was provided to solve big error in calculation of conductive arm impedance. Theoretical and simulation calculation of impedance value of two kinds of conductive arms were calculated and mass of conductive arm was obtained. Impedance, electric energy loss, and electrode governing parameters of two conductive arms were compared and analyzed. Simulation results show that power loss of fused magnesium furnace adopting aluminum alloy conductive arm and copper-steel composite conductive cross arm is similar, but electrode lifting speed and control performance are improved.