选矿厂生产用水模糊控制系统.pdf

Mav 2009 金 属 矿 山 METAL MINE 总 第395期 2009年第5期 选矿厂生产用水模糊控制 系统 崔学茹 (辽宁地质工程职业学院) 摘 要 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。 关键词 循环水 静压回水 模糊控制器 Fuzzy Control System for the Process W ater in Concentrator Cui Xuenl (Liaoning Institute of Geological Engineering Vocation) Abstract 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 generaly 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 re— alize a zero discharge with the conventional automatic contro1．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 emer— gency tank by a combination of advanced fuzzy control theory and the empirical method，and adjusts the static pressure re— turn—water control valve based on the forecast resuh，SO as to control the emergency tank level within a rational scope under the prerequisite of ensuring the concentrator~process water，and to realize a real zero discharge，thus reducing the environ— ment pollution and producing great economic and social benefits． Keywords Recycling water，Static pressure water，Fuzzy controler 选矿厂生产用水包含两部分：一是尾矿的浓缩 过程，二是生产系统补水过程。 浓缩排矿系统是选矿工艺流程中的重要环节， 选矿厂尾矿输送系统特点：尾矿量大、粒度细、浓度 低、输送管路长。对上述4个特点进行分析发现，排 矿浓度低是 目前选矿厂尾矿输送系统的关键问题之 一 。 由于输送距离长、输送尾矿量大，歪头山选矿厂 采用两条管路、三级泵站接力式输送，将尾矿输送到 尾矿坝。尾矿的低浓度输送造成电能的大量浪费， 增加设备的磨损，使得尾矿系统能耗大、磨损快