摘要:
An agitator for applying an alternating field to a melting furnace main body in order to melt a row material to form a melt includes a plurality of magnets, which are arranged so that magnetic lines of force emitted from one of the magnets pass through the melt in the melting furnace main body and return to another magnet, the magnets being fixed to an inclined surface which is inclined by an angle with respect to a horizontal surface, and being rotatable around an axis substantially perpendicular to the inclined surface.
摘要:
A melting and holding furnace comprising a preheating and melting chamber (2) defining a preheating tower section (2a) in an upper position and a melting section (2b) in a lower position, a holding chamber (8) communicating with the melting chamber (2), and a well (5) communicating with the holding chamber (8). A melting burner (4) is provided for jetting out flames obliquely downwardly into the melting section (2b).
摘要:
A hot metal car (3) is used for the transport of molten pig iron from a blast furnace to a steel making plant, the car (3) having an opening through which it is filled and emptied. To restrict heat loss from the car (3), the opening is closed by a disposable cover (10) which is at least partly lost into the molten iron during the course of the emptying or filling of the car at the end of the journey from the blast furnace to steel plant and back.
摘要:
A load current value I of a motor (4) rotationally driving an impeller (3) is read out when the impeller (3) is rotated at a predetermined set rotational speed X 0 , and the rotational speed of the impeller (3) is increased so that the load current value I becomes equal to or larger than a threshold value I 0 when it is determined that the load current value I is smaller than the predetermined threshold value I 0 .