CO2-O2 oxygen lance nozzle for converter steelmaking and converting method

• Main Authors: WEI GUANGSHENG, DONG JIANFENG, ZHU RONG, FENG CHAO, DONG KAI, LI WEIFENG, YAO LIUJIE, WU WENHE, JIANG JUANJUAN, ZHOU YUN, HAN BAOCHEN
• Format: Patent
• Language: Chinese; English
• Published: 03.01.2020
• 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 provides a CO2-O2 oxygen lance nozzle for converter steelmaking and a converting method and belongs to the technical field of steelmaking. The oxygen lance nozzle comprises a water return ring seam, a water inlet ring seam, a CO2 ring seam channel, an O2 channel, a CO2 mixed nozzle, a crown and a gas collection upper portion. The O2 channel is formed in the middle of the oxygen lancenozzle. The CO2 ring seam channel is arranged outside the O2 channel. The water inlet ring seam is arranged outside the CO2 ring seam channel. The water return ring seam is arranged outside the waterinlet ring seam. The oxygen lance nozzle is of a four-channel structure. After ejected from the CO2 mixed nozzle through the CO2 ring seam channel, high-pressure CO2 gas is premixed with high-pressure O2 at a laval contraction section, and a supersonic jet is formed through acceleration of a laval spray hole expansion section. With the heat absorption characteristic of the reaction CO2+C=2CO, according to converter metal