Briefly discussed some methods of prolong the life of the medium and low carbon ferromanganese furnace.

To reduce carbon content, taking the following measures such as increasing silicon conlent([Si]%>25%) in silicomanganese, reducing outside carbon content,operating in low basicity in smelting low carbon ferromanganese etc.

It introduces the combustion technology being used as the blast furnace gas for the heating burden system in 3MVA medium carbon ferromanganese furnace.

It briefly introduces the process of producing medium and low carbon ferrochromium with hot charging ferrochromium in electro-silicothermic method as well as the economic benefit obtained.

It analyses the behavior of remained ferroalloy in smelting process, proves that taking use of remained ferroalloy process notonly can greatly improve technological economic indexes in smelting high carbon ferromanganese and ferromanganese-silicon, but also can raise the productivity of furnace.

Adopting microwave digestion technology to digest samples, the contents of Si, P, Cu and V in high carbon ferromanganese are determined with ICP-AES method, and the optimal work conditions are researched.

Based on the domestic manganese mineral resources and the common fluxe smelting processes for high carbon ferromanganese and Mn Si ferroalloy by submerged electric furnace, the main technological and economic indexes were compared and analyzed.