Melting time

and specific throughput/h are determined essentially by the specific output in kW/t, the melting process and the operation of the system. The heat losses are proportional to the melting time and are correspondingly lower at high furnace output than at low outputs. With a 5-t furnace and a furnace output of 3,100 kW, one can reckon on a tap-to-tap time of approx. 60 min for GG at 1,450 °C tapping temperature. At a tapping temperature of 1,550 °C, this gives an increased tap- to-tap time of approx. 64 min. These times also include the additional time for the required handling. The pure melting times for the above examples are approx. 52 min. and 55 min. respectively.