Waste heat recovery from smelting reduction ironmaking in heat pipe type rotary hearth furnace and steam production apparatus

A heat pipe type rotary hearth furnace melting reducing iron-making waste heat recovery and steam producing device is composed of a secondary combustion setting chamber (2), a steam superheater (6), a heat pipe steam generator (8), a heat pipe feed water preheater (10), a bag type dust collector (12), a chimney (13) and a steam dome (20). The waste heat recovery and steam producing device is characterized in that one side of the outer wall of the secondary combustion setting chamber (2) is provided with an inlet (1), and the other side is connected with an outlet (4) which is connected with a high-temperature flue (5); the steam superheater (6) and the heat pipe steam generator (8) are arranged on the high-temperature flue (8); the heat pipe steam generator (8) adopts heat pipes to be as the heat conducting elements; the bottom end of the high-temperature flue (5) is provided with an ash discharge tee (9); the horizontal outlet of the ash discharge tee (9) is orderly connected with the heat pipe feed water pr