选矿厂生产用水模糊控制系统

Fuzzy Control System for the Process Water in Concentrator

选矿厂生产用水包括浓缩循环水系统、尾矿库静压回水系统和清水补充系统,用水原则是充分利用循环水,多用尾矿库回水,少用清水,实现零排放。在生产实践中,由于尾矿库距离远,随着生产的波动,生产用水和循环水又不稳定,要想实现既满足生产用水需求,又实现零排放,常规自动控制难以实现。基于此,在系统中设计1套以模糊控制理论为基础的专家系统,通过模糊控制理论这种先进的控制方式结合人工的经验,对循环水井和事故池液位的变化趋势进行判断和预测,根据判断和预测结果,对静压回水控制阀门进行调节,实现在保证选矿生产用水的前提下,将事故池液位控制在合理范围内,真正实现零排放,减少环境污染,产生较大的经济效益和社会效益。

The concentrator process water includes thickening recycling water, static pressure return-water of tailing reservoir and clear water supplement, and the principle for using water is to use more return-water from the tailing reservoir and less clear water, and to realize a zero discharge. In the practice, as the tailing reservoir is generally far away, and the process needed water and the recycling water are instable, it is hard to both satisfy the requirement of process water and realize a zero discharge with the conventional automatic control. Therefore, an expert system based on fuzzy control theory was designed, which makes the judgement and forecast of the water level change of the recycling water tank and the emergency tank by a combination of advanced fuzzy control theory and the empirical method, and adjusts the static pressure return-water control valve based on the forecast result, so as to control the emergency tank level within a rational scope under the prerequisite of ensuring the concentrator＇s process water, and to realize a real zero discharge, thus reducing the environment pollution and producing great economic and social benefits.