磁处理强化煤泥水絮凝沉降的实验研究

Study on flocculating sedimentation of slim water treated by magnetic field

为了提高煤泥水的絮凝沉降效果,首先对煤泥水进行磁场预处理,再进行絮凝沉降实验,分析澄清区高度和清液浊度的变化。结果表明:在一定范围内,煤泥水的沉降效果随着磁场强度的增大、磁处理时间的增长而提高;当HPAM用量1.5 m L、磁场强度200 m T、磁处理时间30 min时,澄清区的高度最大,清液的浊度最小。磁场对煤泥水的絮凝沉降起着一定的强化作用,该研究为煤泥水处理工艺的改进提供了参考。

This paper highlights an experimental research intended to improve the flocculation settling effect of coal slurry. This improvement study begins with magnetic field pretreatment of coal slurry,followed by flocculation sedimentation tests designed to probe the changes in height of the clarification zone and the turbidity of the supernatant liquor. The study finds that,within a certain range,a better flocculating sedimentation performance results from a greater magnetic intensity and a longer treating time; a 30 minute treatment of the slim water using magnetic field strength 200 mT and HPAM dosage 1. 5 mL affords a maximum height of the clarification zone and a minimum supernatant turbidity; and the magnetic treatment contributes to improving the flocculating sedimentation. The study may provide a reference for an improved slime water treatment.