Abstract
The flow rate control of molten metal was investigated by means of a pair of 3 phase 200 V flat type linear induction electromagnetic pumps.
Two pumps of each capacity 11.5 KVA were placed at both sides of the vertical nozzle and were operated to induce the force in the direction opposite to the free falling of the metal.
The molten metals used were Al alloy and cast iron.
For Al alloy, the flow rate decreased from 1.20 Kg/sec to 0.83 Kg/sec by increasing the input voltage from 0 to 200 V, resulting in the maximum control of the molten metal flow rate of 30%.
For cast iron, the power output of the pumps was not sufficient to control the flow rate, because of the lower electrical-conductivity of cast iron as compared with Al alloy.
These results were confirmed theoretically, and the data necessary for design of electromagnetic pump were obtained.
