【摘要】 采用SIEMENS公司的Wincc/S7 3 0 0控制系统 ,实现了鲁南矿业公司立式磁选机选矿生产线的基本控制功能 ;带偏置补偿PID控制回路的应用 ,提高了二段浓度控制的响应速度 ,并减少了控制超调 ;针对浓度干扰因素多、大滞后、易超调的特点 ,采用模糊控制技术研究并开发了浓度模糊控制模型 ,应用并实现了一段浓度的控制 ,控制精度在设定值 2 %以内。精矿品位从原来的 64 3 %上升到 64 7% ,回收率提高了0 6% ,精矿产量提高 2 %以上。更多还原

【Abstract】 SIEMENS Wincc/S7-300 control system was used in the vertical magnetic ore separator of Lunan iron ore company. The forward bias offset PID control algorithm improved the second segment concentration control response speed and reduced control overshoot, concentration fuzzy control model greatly resolved the huge lag of control variant and disturbance. Those methods help to control the first segment ore mud concentration and achieve high control accuracy within 2% in set point thus increased the purity rank from 64\^3% to 64\^7% and 0\^6% recovery rate and 2% output.更多还原