METHOD OF UTILIZING MN ORE FOR EAF OPERATION

摘要

PURPOSE: A manganese ore utilization method during an electric steel making process is provided to collect an alloy component of manganese content and a MnO reducing agent enough into the molten steel by injecting cheap manganese ore and the MnO reducing agent during the electric tapping or the ladle furnace work during a steel making. CONSTITUTION: A manganese ore utilization method during an electric steel making process is to inject the manganese ore with 20-70 wt% of manganese content simultaneously with the MnO reducing agent with higher oxygen affinity than the manganese ore during the electric furnace tapping or the ladle furnace work. The 0.1-1 wt% of manganese ore with the ratio to molten metal during the electric furnace tapping or the ladle furnace is injected The 1-60 wt% of MnO with the ratio to the injected manganese ore is injected. The MnO reducing agent is C, Si and Al group reducing agent. The manganese ore and the MnO reducing agent is injected when the electric furnace tapping, and then collected during the ladle furnace working The molten steel refined in the ladle furnace is made into a plate, shaped steel, an iron rod and so forth through a continuous casting. [Reference numerals] (AA,BB,CC,DD) Input kg/ton-steel