Electric Pig Iron furnaces are becoming popular where suitable metallurgical coke is not available in sufficient quantities and where electricity is cheap. The advantage with the furnace is that coke consumption is reduced by 50 percent, as heating is done by electricity and only reduction of the iron ore is done by coke. A medium sized furnace of the type can produce 100 to 110 tons per day. Charging of raw materials and other operation principles are practically same as that of the other common methods. Now-a-days , low shaft blast furnaces being developed to make use of low grade coke and iron ore. Oxygen also is used to help the reaction.
Another process which is also being developed is the sponge iron process. This new process for treating low grade iron ore by direct reduction , in place of the conventional blast furnace method, is being fast developed. It will be of great advantage to a country like India where large quantities of low grade iron ore remain unused.
A certain amount of scrap, about 25 percent of the Total iron is mixed. This scrap generally consists of Cast Iron may include also contain mild steel scrap. When considerable steel scrap is used along with pig iron, small amount say from 2 to 4 percent, of ferro- Manganese is used as deoxidizer.
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