Iron plate *5+ melting furnace = iron furnace
Iron furnace uses the same fuel as melting furnace, but the burning speed of iron furnace is 20% faster than melting furnace, and the fuel utilization rate is 25% higher.
Circuit board+Redstone *2+ iron furnace = electric furnace
As the name implies, electric furnaces use electricity to burn things. Its efficiency is higher than that of iron furnace 12.5%. It can stop firing at any time by cutting off the power supply and keep the firing progress. If the coal needed for burning an article in an iron furnace is used for power generation, it can generate 400EU, and burning an article in an electric furnace consumes 390EU.