According to the process characteristics of Shougang Qiangang Company for smelting duplex steel,the carbon powder slagging process of LF furnace is developed by using the foaming properties of carbon powder in the slagging process of LF furnace.At the same time,the effects of carbon powder addition on the oxygen content in steel,carbon content in steel and the heating efficiency of the electrode were studied through industrial production experiments.The test results show that when LF furnace smelts heating-up steel,adding appropriate amount of carbon powder to react with refining slag and oxygen in steel can effectively promote refining slag foaming,improve electrode submerged arc effect,and improve electric energy utilization rate.At the same time,the reaction between the added carbon powder and the oxygen in the steel can reduce the oxygen content in the steel,and the composition of the molten steel will not be affected under the condition that the total amount added is≤80 kg.
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