Process for regulating the hot metal refining operation

Details Process for regulating the hot metal refining operation Process for regulating the hot metal refining operation

C - Chemistry, Metallurgy

21

C

C21C 5/32 (2006.01) C21C 5/30 (2006.01) C21C 5/46 (2006.01) C21C 7/068 (2006.01)

Patent

CA 2057093

A B S T R A C T The invention concerns a process for controlling the operation of the refining of hot metal in a steelmaking converter by blowing from above at least two supersonic primary oxygen jets of a given total flow rate against the surface of the bath to be refined. This process is characterized in that the aimed at ratio between the decarburization speed of the metal and the oxidation speed of the slag is achieved by the fact that each one of the jets coming out of a non rotating lance impinges within the same annular area of on the bath with a given energy. Depending on the physico- chemical condition of the bath, the impact energy of the jets is varied between upper and lower limits, whereas at the same time the height of the lance above the surface of the bath together with the total volume of the oxygen flow feeding the bath are both kept at a practically steady level. Figure 1.

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