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为了解决首秦高炉炉顶布料圈数波动大的问题,对现场多种因素进行调查分析,确定了造成该现象的根本原因是角机反馈角度与节流阀实际开度无法准确对应。根据原有角度反馈控制模式建立了对应的数学模型,并且创新性地提出节流阀的开度由角机角度控制更改为油缸直线位移控制;采用将磁滞位移传感器置于油缸内部的方法,该传感器线性误差在量程300 mm以内可以小于150μm,而且不受外界环境干扰。改进后,首秦高炉在实际生产中布料圈数稳定性显著提高,实际布料圈数与工长要求布料圈数误差在±0.5圈以内,满足了高炉对装料、布料制度的要求。
In order to solve the problem of large fluctuation of the fabric number of blast furnace roof in Shouqin, the investigation and analysis of various factors in the field confirmed that the root cause of this phenomenon is that the feedback angle of the angle machine and the actual opening of the throttle valve can not be accurately corresponded. According to the original angle feedback control mode, the corresponding mathematical model is established, and the opening degree of the throttle valve is proposed to be changed from the perspective control of the angle machine to the linear displacement control of the cylinder. By adopting the method of placing the hysteresis displacement sensor inside the cylinder, The linearity error of the sensor can be less than 150μm within 300mm range, and it is not disturbed by the external environment. After the improvement, the stability of the number of fabric loops in Shouqin blast furnace increased significantly. The error between the actual number of fabric loops and the number of fabric loops required by the workers was within ± 0.5 circle, which satisfied the requirement of blast furnace for loading and fabric.