Method of and apparatus for controlling the flow rate of outstre

Details Method of and apparatus for controlling the flow rate of outstre Method of and apparatus for controlling the flow rate of outstre

1991-06-03

1993-05-04

Fuller, Benjamin R.

Weighing scales

Combined

177 60, 177165, 177199, 177210EM, 177 1, G01G 1900

Patent

active

052072851

ABSTRACT:
A method and an apparatus for accurately weighing by a ladle weighing unit (2) of a metal melt in a ladle (3), in which the melt can be heated and stirred by power supplied by an induction coil (4). The induction field of the coil (4) is also applied to a coil weighing unit (1) so that the reaction force of the magnetic field influencing the melt is measured. In a weighing system (5), the net weight of melt is calculated by subtracting the signal of the coil weighing unit (1) from that of the ladle weighing unit (2). The weight change per time unit, which represents the mass flow rate of melt from the ladle, is calculated in the control system (6) and is used to control the pressure in the ladle in such a way the metal flow is kept constant.

REFERENCES:
patent: 3842893 (1974-10-01), Booth
patent: 3890833 (1975-06-01), Peer
patent: 4084631 (1978-04-01), Kunzmann
patent: 4986517 (1991-01-01), Ford et al.
patent: 5054664 (1991-10-01), Bruckner
patent: 5123631 (1992-06-01), Matsuoka et al.

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