The voltage requirement for an electric furnace used in metallurgical processes can vary widely depending on factors such as the type of furnace, the specific metallurgical process being carried out, the desired temperature range, and the design of the furnace.
In general, electric furnaces used for metallurgical processes often operate at high temperatures, and the voltage required would typically be in the range of several hundred to several thousand volts. Some specialized high-temperature electric furnaces might even require voltages in the tens of thousands of volts.
It's important to note that the voltage requirement alone isn't the only consideration when operating an electric furnace. The current, power, and other electrical parameters also play a significant role in determining the overall performance and efficiency of the furnace.
If you have a specific type of electric furnace or metallurgical process in mind, it's recommended to consult the manufacturer's specifications or an expert in the field to determine the exact voltage requirement for that particular application.