【摘要】 由于水钢铁水[P]高达0.104%~0.157%,100 t顶底复吹转炉在冶炼30~#~80~#、SWRH82B、ER70S-6、SWRCH22A、40Cr等优质钢时,采用双渣操作降低钢中磷含量,钢铁料消耗为1 054kg/t,石灰消耗为32.4 kg/t。通过单渣法热平衡,提高初期渣脱磷能力,中、后期造渣制度、供氧制度和炉容比优化的分析,建立了优质钢单渣法深脱磷工艺。应用结果表明,优质钢的钢铁料消耗降低到1 047 kg/t,石灰消耗降低到29.4 kg/t,出钢[C]=0.14%~0.28%,出钢[P]=0.014%~0.020%。更多还原

【Abstract】 Since the phosphorus content in hot metal at Shuisteel is up to 0.104%~ 0.157%,the 30~# ~ 80~#,SWRH82 B,ER70S-6,SWRCH22 A and 40 Cr etc high quality steels are melted by 100 t top and bottom combined blown converter using double-slag operation to reduce the phosphorous content in liquid,in this case the metal consumption is1 054 kg/t and the lime consumption is 32.4 kg/t.Based on the analysis of thermal equilibrium of single-slag process,increasing early slag dephosphorizing ability,optimization of slagging schedule in middle and latter period and oxygen supply schedule,and optimization of furnace capacity ratio,the single-slag deep dephosphorization process for high quality steels is established.The application results show that metal consumption for melting high quality steels decreases to 1 047 kg/t,the lime consumption decreases to 29.4 kg/t,the tapping[C]=0.14%~0.28%and the tapping[P]=0.014%~0.020%.更多还原