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  Blast furnace can be used for matte smelting of copper,nickel,cobalt and other metals,reduction smelting of metals such as lead,zinc,also can be used for melting impure copper and other materials processing.Blast furnace burden is generally block,fuel is coke.Burden is added in batches from the top,forming a stock column.Air is added from tuyere below,coke burns in the tuyere(outlet)area,forming a high-temperature melting area;furnace burden reacts violently here,continue to melt.When you reduction smelting,melt was clarified in the hearth,metal and slag were released. When you matte smelting,the melt flows into the external crucible from internal crucible,to clarify the separation of matte and slag.Hot flue gas through the melt and reach the top,this process make the melt preheating(kneading concentrate smelting can sinter concentrate),partial melting chemical reactions will happen at the same time.So blast furnace has high thermal efficiency,high specific productivity(specific capacity).