To melt the charge, radio frequency(induction heating)or resistance heating have been used .
为了熔化进料，可用射频（感应加热）或电阻加热法。
2
To melt the charge radio frequency induction heating or resistance heating have been used.
为了熔化进料，可用射频感应加热或电阻加热法。
3
This paper analyzes the mathematical model of a resistanceheating furnace, showing that a normal controller is unable to reach a high control accuracy.