马钢新区300t转炉自动化炼钢系统

Automatic Control System of 300t Oxygen Furnace

介绍了马钢新区300 t转炉的自动化炼钢。分别阐述了运用交流传动控制大型转炉倾动,合理运用主从、负荷平衡,实现了4台电机转矩的一致,针对倾动安全控制采用了4种保护措施;氧枪控制方式采用手动、半自动、全自动3种控制模式,氧枪保护采用2层参数控制,确保氧枪的操作安全,"自动氧步"实现了"一键式"炼钢;"自动加料"有效的提高了终点的碳、磷、温度的命中率。PLC系统选用SIEMENS公司的S7-400PLC和PCS7软件;传动装置采用SIEMENS的6SE70,MM440和G1503个系列的变频器,所有变频器都由PLC通过PROFIBUS网络进行控制。该套系统已成功应用马钢新区炼钢分厂,实现了转炉炼钢的全自动化冶炼,降低了物料的消耗,减轻了环境污染,取得了显著的经济效益和社会效益。

Master,slave control and load balance control methods are used in the AC drive system to assure the torque consistent of each motor.Four protection measures are taken to guarantee the safety of drive system.Oxygen lance has three operation mode: manual,self-automation,automation and is controlled by converter through two layer parameters in order to assure the safety operation.Automatic oxygen-step function simplifies the operation of operator and automatic feeding function enhances the control accuracy of Carbon,Phosphorus and temperature.S7-400 PLC hardware and PCS7 software of SIEMENS are used for L1 system and converters are controlled by PLC via PROFIBUS network.Practical application results show that good control effect was obtained.