电渣重熔电极升降控制系统优化设计

摘要

ESR furnace which controls the current swing range keeps the electrode end invasive slag depth unchanged equivalently,thereby maintains a constant slag temperature and molten pool shape unchanged,so as to obtain high-quality ESR ingot.According to the analysis of existing electroslag re-furnace electrode lift control principle,a new set of control system is developed:PLC control electrode lifting system,the by using of computers and Step7 WinCC programming software to achieve the control requirements.The amplitude of electroslag furnace current swing is controlled in ± 150A.Melting rate swings is controlled in ± 0.5kg/min.The quality of ESR ingot surface is fine.%电渣炉通过控制电流摆动范围等效地保持电极端部侵入熔渣深度不变,从而保证了熔渣温度恒定及熔池形状不变,以便获得高质量的电渣锭.根据对现有电渣重熔炉电极升降控制原理的分析,开发了一套新的控制系统:采用PLC控制电极升降系统,利用计算机及Step7、WinCC等编程软件来实现控制要求,电渣炉电流摆动幅度控制在±150A.熔化速率摆动幅度控制在±0.5kg/min,电渣锭表面质量良好.