降低脱磷铁水-60t AOD-LF-150mm×150mm CCM冶炼0Cr13钢全氧含量的生产实践  

Production Practice of Decreasing Total Oxygen Content in Steel 0Cr13 Steelmaking by Dephosphorized Metal-60 t AOD-LF-150mm×150mm CCM

作　　者：王百顺 冯文甫 郭键 叶凡新 马富平 曹红波 

机构地区：[1]邢台钢铁有限责任公司炼钢厂,邢台054027

出　　处：《特殊钢》2018年第1期34-36,共3页Special Steel

摘　　要：采用CO二次燃烧、3.5%~5.0%Si高碳铬铁、合金烘烤等热补偿技术,降低了800 kg还原产物SiO_2以提高Si的脱氧能力;AOD炉渣碱度控制在2.3~2.4,并在AOD二次还原、LF精炼过程配比5 kg/t活性石灰,可提高脱氧、脱硫效率30%以上;在CaO-SiO_2-MgO渣系(CaO)/(SiO_2)=2.2时,萤石的加入量控制在石灰总量的13%~17%时,炉渣粘稠度较好,对化渣、吸附夹杂有利,使Φ5.5 mm线材全氧含量由优化前60×10^(-6)~90×10^(-6)降至30×10^(-6)~40×10^(-6),S含量由原0.005%~0.010%降至0.003%~0.007%。With the thermal compensation technology including using CO secondary burning, 3.5% - 5.0% Si high carbon ferrochromium and alloys baking, the reduced product SiO2 decreases by 800 kg to increase the deoxidation ability of silicon ; with controlling AOD slag basicity 2. 3 - 2.4 and carried out secondary reduction in AOD refining, and adding 5 kg/t active lime in LF refining process, the efficiency of deoxidation and desulphurization increases by more than 30% ; and with （CaO）/（SiO2） = 2. 2 of CaO-SiO2-MgO slag series controlling adding amount of fluorite amounting to 13% 17% of the total lime to get better slag viscosity and be available to slagging and absorbing inclusions, the total oxygen con- tent in qb5.5 mm wire rod decreases to 30 ×10^ -6 - 40 ×10^-6 from 60 ×10^-6 - 90×10^ -6 before optimization and the S content decreases to 0. 003% -0. 007% from original 0. 005% - 0. 010%.

关 键 词：60 t AOD 精炼渣系 全氧含量 生产实践 

分 类 号：TF76[冶金工程—钢铁冶金]