论文部分内容阅读
MgO是高炉渣的重要成分,渣中含有一定的MgO可降低炉渣粘度,提高炉渣流动性,提高还原性以及软化和熔化温度而改善冶金性能;烧结矿含有一定数量的MgO,可降低低温还原粉化性改善高炉透气性。工业试验表明,目前条件下攀钢烧结矿提高MgO 0.2%左右,矿相结构与矿物组成改善,强度提高0.10%左右,低温还原粉化率由66.03%降低到64.33%,但还原度由84.46%下降到84.13%,烧结矿粒度约有偏差。高炉渣中MgO质量分数提高0.35%达到7.8%~8.0%,炉渣熔化性温度与粘度下降,炉渣流动性由115 mm提高到170 mm,铁损由7.09%降低到5.15%,校正后产量下降18 t/d,但综合焦比下降了6.57 kg/t,节焦效果显著,同时烧结与高炉的工艺参数得到优化。
MgO is an important component of blast furnace slag, slag containing a certain amount of MgO can reduce the viscosity of slag, improve slag flow, increase the reduction and softening and melting temperature and improve metallurgical properties; sinter contains a certain amount of MgO can reduce the low temperature reducing powder Improve the gas permeability of the blast furnace. Industrial tests show that, under the current conditions, the sintering temperature of the steel increases by about 0.2%, the structure and mineral composition of the ore phase improves, the strength increases by about 0.10%, the reduction rate of low temperature reduction from 66.03% to 64.33%, but the reduction degree decreases from 84.46% Down to 84.13%, sinter grain size deviation of about. The mass fraction of MgO in blast furnace slag increased by 0.35% to 7.8% -8.0%, the melting temperature and viscosity of slag decreased, the fluidity of slag increased from 115 mm to 170 mm, the iron loss decreased from 7.09% to 5.15%, and the corrected output decreased by 18% t / d, but the comprehensive coke ratio decreased by 6.57 kg / t, the coke effect is significant, while the sintering and blast furnace process parameters are optimized.