Refining light treatment process based on tapping process metallurgy

• Main Authors: ZHANG JUNGUO, ZHANG HEJUN, ZHAO XIAOHU, WANG HONGFENG, LIU PENGJU, LI XIAODE
• Format: Patent
• Language: Chinese; English
• Published: 02.05.2023
• Subjects: CHEMISTRY; METALLURGY; METALLURGY OF IRON; PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS

The invention discloses a refining light treatment process based on tapping process metallurgy. The refining light treatment process comprises the steps of molten iron desulfurization pretreatment, converter smelting, converter tapping metallurgy and refining light treatment. In the converter tapping metallurgy step, refining slag or furnace slag is added along with steel flow during tapping for modification; the material adding sequence of the SiMn deoxidized steel in the tapping process is premelted slag, lime, silicon manganese, aluminum blocks and alloy, and the material adding sequence of the Al deoxidized steel in the tapping process is aluminum blocks, premelted slag, lime, silicon manganese and alloy; the pre-melted slag is added when 1/5-2/5 of steel is discharged, the adding amount is 2.0-5.0 kg/t * steel, the lime is added after the pre-melted slag is discharged, and the adding amount is 1.5-5.0 kg/t * steel; and after the steel is discharged, adding a top slag modifier on the slag surface, wherein