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针对纯镁和镁基喷吹脱硫中液态脱硫渣较难扒除,引起转炉出钢回硫高等问题,提出了一种液态渣喷吹改性除硫新工艺。通过水力学模型试验,对比研究了直接投加改性剂、投加后搅与喷吹改性新工艺的改性效果和影响因素。结果表明:与目前使用工艺相比,提出的喷吹改性新工艺具有优良的反应动力学条件,可显著增大液面处改性剂的反应面积和数量。工业性试验表明,使用脱硫液态渣改性除硫新工艺后,有效降低了液态脱硫渣带入引起的转炉出钢回硫,保证了高附加值低硫钢的稳定生产。
Aiming at the problems of desulfurization of liquid desulfurization slag in the pure magnesium and magnesium-based injection desulfurization, it is difficult to remove the desulfurization residue and cause the problem of high sulfur recovery in the tapping of the converter. A new technology for sulfur removal by liquid slag injection is proposed. Through the hydraulic model test, the modification effect and influencing factors of the direct injection modifier, mixing and blowing after injection are compared and studied. The results show that compared with the currently used technology, the new technology of blowing modification has excellent reaction kinetics conditions, which can remarkably increase the reaction area and quantity of the modifier at the liquid level. Industrial tests show that the use of desulfurization liquid slag modified sulfur removal process, the effective reduction of the liquid desulfurization slag brought into the converter tapping back to the sulfur to ensure the stable production of high value-added low-sulfur steel.