Underflow-type flow-controllable electric-heating graphite nozzle device of electromagnetic induction slag smelter

The invention relates to an underflow-type flow-controllable electric-heating graphite nozzle device used for short-flow rock wool production. The device is structurally characterized in that a graphite sleeve is fixed on a bottom lining, the upper end of a graphite electric-heating spiral tube is connected to the graphite sleeve in a threaded manner, an electric-heating tube graphite conducting plate is fixed to the graphite electric-heating spiral tube through a graphite fixing nut, and refractory filler is arranged on two sides of the graphite electric-heating spiral tube. The device has the advantages that the process using the device saves more than 60% of energy consumption per ton as compared to the cupola rock wool process; no environmental pollution occurs; the slag smelter is high in power factor, low in energy consumption and high in heating speed; the bottom-leak deslagging nozzle ensures accurate flow, and no melt is wasted; the adaptation range is wider, and the furnace burden ingredients are adjustable; a slag bath with the upper temperature limit of 1700 DEG C is satisfactory to melts of various qualities, with no need for coke; magnetic stirring and mechanical stirring guarantee even melt ingredients; energy consumption is low, heat efficiency is high, and waste slag is little; the smelter is superior in terms of temperature rise, temperature adjustment, temperature retention and conditioning and is high in loading capacity.