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一重生产超纯低压转子钢的工艺流程为EAF-LF-VD-VCD,为了满足超纯低压转子钢的成分要求,在理论分析的基础上,通过实验室实验研究和热力学计算,得到能满足超纯低压转子钢成分要求的高效脱磷及脱硫渣的成分.其中,在高效脱硫渣中,SiO2含量小于6%可以保证在LF-VD精炼过程中不发生增硅现象,而Al2O3含量为2%～4%则可避免在VD炉真空精炼过程中增铝现象发生.生产实践证明,研究得到的电炉脱磷渣和LF-VD炉脱硫渣能实现高效脱磷和脱硫,达到超纯低压转子钢的成分要求.
In order to meet the compositional requirements of ultra-pure and low-pressure rotor steel, based on the theoretical analysis, through laboratory experimental research and thermodynamic calculation, the process flow of producing ultra-pure low-pressure rotor steel is EAF-LF- Pure low-pressure rotor steel components required for efficient dephosphorization and desulfurization slag composition.Among them, in the high-efficiency desulfurization slag, SiO2 content of less than 6% can ensure the LF-VD refining process does not occur silicon addition, and Al2O3 content of 2% ~ 4% can avoid the increase of aluminum during the vacuum refining process of VD furnace.Practice has proved that the dephosphorization slag and LF-VD furnace desulfurization slag obtained by the research can realize high-efficiency dephosphorization and desulfurization, and reach ultra-pure low-pressure rotor steel The composition of the requirements.