Patent ID: 8313550

Claim:
A processing method for avoiding degraded spheroidization and pouring temperature drop of liquid spheroidal graphite cast iron during a pouring process, comprising: pouring liquid spheroidal graphite cast iron into a pouring electric furnace device for liquid spheroidal graphite cast iron; arranging high temperature molten alkali slag, which contains an alkali earth metal ion, rare earth metal ion, or a mixture of them, above the liquid spheroidal graphite cast iron, the temperature of the alkali slag controlled to be 1500° C.˜1700° C.; connecting the liquid spheroidal graphite cast iron as a cathode to a negative pole of a DC power supply, providing an electrode in the alkali slag and connecting the electrode as an anode to a positive pole of the DC power supply, and using the alkali slag as a liquid electrolyte; and conducting direct current in the pouring electric furnace device through the DC power supply, strength of the direct current is determined as follows according to the capacity of the pouring electric furnace device: a current equivalent of 20˜50 Faraday for each ton of liquid spheroidal graphite cast iron per hour.