Converter low-alkalinity residue high-efficiency dephosphorization method
A technology with low basicity and slag basicity, applied in the field of converter steelmaking dephosphorization, can solve the problems of unrealistic steelmaking dephosphorization and narrow application range
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[0004] The slag retention method is adopted to increase the FeO content in the slag, and the low gun position operation is adopted in the early stage of blowing to increase the temperature of the molten pool, accelerate the melting of lime, and quickly form the initial slag. Make full use of the advantages of high FeO and low furnace temperature in the early slag, and quickly remove the slag. Phosphorus; the oxidation period of Si and Mn basically ends, C—O 2 At the beginning of the reaction, reduce the oxygen supply intensity (oxygen flow ≤ 16500m 3 / h Oxygen pressure ≤ 0.7MPa), appropriately causing "soft blowing" to increase the number of reflective streams, increase the impact area, and reduce C—O 2 Reaction speed, increase FeO content in slag to reduce slag viscosity, improve "wetting" effect, facilitate FeO migration and diffusion into lime lattice, reduce lime surface C 2 s generated. This operation mode inhibits the rapid rise of furnace temperature, and is also cond...
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