Coke(焦煤)moved by conveyor (emmiting harmless steam)by conveyor to the blast furnace Coking(炼焦)eliminates tar and other impurities by baking in long, vertical coking ovens In one continuous process,the coke and fluxed pellets are charged(装炉)into the furnace,blasted with superheated air and natural gas;up to 3000 F(Fahrenheit). The intense heat melts the limestone in the pellets,the limestone combines with impurities in the iron to form slag,which then floats to the surface of the molten iron.Coke(焦煤) moved by conveyor (emmiting harmless steam) by conveyor to the blast furnace Coking(炼焦) eliminates tar and other impurities by baking in long, vertical coking ovens The intense heat melts the limestone in the pellets, the limestone combines with impurities in the iron to form slag, which then floats to the surface of the molten iron. In one continuous process, the coke and fluxed pellets are charged(装炉) into the furnace, blasted with superheated air and natural gas; up to 3000 F (Fahrenheit)