Rotary Hearth Electric Furnace structure outer covering becomes by the steel plate and the section welding, the furnace body welds the system full circle densely by the steel plate, lower part the spatial installment has the turntable support, the kingbolt, on the furnace body foot ledger wall the installment has the velocity modulation electrical machinery and the transmission gearbox, through the umbrella type gear and the main axle connection, transfers the bottom type resistance furnace's furance village material to use fan-shaped ultra light quality high strength 0.6g/cm3 to conserve energy the fireproof heat preservation brick, the heat insulating layer uses the aluminum silicate textile fiber felt and the inflation heat preservation powder, the resistance silk thread becomes spiral-shaped, installs according to the average temperature rule in the resistance wire trough, the base also arranges the resistance wire in the special-purpose trough, in such furance the temperature is even, the work piece and the turntable cannot bump with the resistance wire, resistance wireThe service life is long, is not easy to damage. The bung uses the stainless steel plate to make the ledger wall, the built-in aluminum silicate heat preservation, the fire door size extends 350mm, high 580mm, in spandrel wall body whole upward promotion type electrically operated heat preservation fire door, when fire door closure the entire fire door is a circular whole, the fire door sealing property strengthens, the turntable uses the stainless steel to make the 1600m/m turntable, with take load bearing work piece, the entire turntable does not divide the location as the plane, the operators may pile up the work piece willfully, because turntable every 40 minutes turn on lathe biography one week, when work the operators did not look nearly the turntable in the rotation, the fire door starts in addition in a big way, the operators may pass in and out the work piece willfully, but is not limited the time the turntable to be possible in 20-60 The minute revolves one week-long time to modulate velocity willfully, no matter the fire door opens shuts, the turntable from the start work on uninterrupted revolving, not any necessity and the fire door open shut carry on the interconnection, needs to stop when revolves, only need press down on the control electricity cabinet's pause button then, the fire door opens shuts, grasps voluntarily by the operators, presses installs nearby the fire door opens shuts Niu then. Transfers the bottom type resistance furnace's temperature control part to use the microcomputer automatic control temperature, controls the warm precision to be high, the simplicity of operator, by the number obviously demonstrated that in the hypothesis temperature value and the furance the temperature value, and by the XWG electron potentiometer automatic recording craft curve, and has the excess temperature warning function. The entire control system movement precision is high, the energy conservation, does not have the noise, not ultraharmonic hysteresis, the reliability to be extremely high, to internationally advanced control the warm system.