Method for preventing dry dedusting explosion venting through converter double-slag smelting secondary gun lowering

• Main Authors: XU TAO, MA XIAOGUANG, DIAO WANGCAI, ZHANG XIAOLONG, TIAN YE, HAN CHUNPENG, ZHANG YIN, ZHANG HUAIJUN
• Format: Patent
• Language: Chinese; English
• Published: 15.04.2022
• 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 method for preventing dry dedusting explosion venting in converter double-slag smelting secondary lance lowering, which comprises the following steps of: closely paying attention to the content value of converter flue gas components fed back by a furnace gas analysis system by reasonably controlling the lance position and oxygen supply intensity in the earlier stage of secondary lance lowering blowing; corresponding measures are taken before secondary gun lowering to delay the CO generation speed, and explosion venting points are avoided; and adjusting the furnace charge structure in advance during secondary lance lowering, and controlling the temperature of the converter molten pool to slow down the carbon-oxygen reaction intensity. And explosion venting is avoided. The invention aims to solve the problem that explosion venting accidents of a dry dedusting system are easy to occur during double-slag smelting, primary turning down and deslagging and secondary gun lowering. 本发明公开了转炉双渣