滚筒筛筛孔堵塞筛分效率低怎么办?


发布时间:

2024-10-15

滚筒筛在石英砂破碎后预分级环节使用普遍,但运行一段时间后筛分效率从设计值85%以上骤降至60%以下,成品中混杂大量本该筛除的细粉或粗粒。问题根源多半在筛孔堵塞上

滚筒筛在石英砂破碎后预分级环节使用普遍,但运行一段时间后筛分效率从设计值85%以上骤降至60%以下,成品中混杂大量本该筛除的细粉或粗粒。问题根源多半在筛孔堵塞上。

滚筒筛带防尘罩版.jpg

物料含水率偏高是堵塞的首要原因。 石英砂含水率超过5%时,细粉会黏附在筛孔内壁,越积越厚形成堵孔。含水率越高,堵塞速度越快。解决办法很简单——在滚筒筛前端增设热风管道或简易烘干机,将物料含水率降至3%以下再进入筛分。若前端已有脱水筛,可适当延长脱水时间,降低入筛物料水分。

筛面清理装置磨损后形同虚设。 滚筒筛通常配有滚刷或刮板用于清理筛面。滚刷磨损到毛刷长度不足原尺寸一半时,清理效果基本消失,筛孔堵塞随之加剧。滚刷属于易损件,建议每三个月检查一次磨损情况,及时更换。停机期间可用高压水枪冲洗筛孔,注意水压控制在0.5MPa以内,避免损坏筛网。

筛孔尺寸与物料不匹配也会造成堵塞。 筛孔过小时颗粒容易卡在孔内,筛孔过大则筛分精度不足。应根据来料粒度分布选择合适孔径——常见配置为上层20mm、中层5mm、下层1mm三层筛网。若原料中片状颗粒较多,筛孔应适当放大一级,减少卡孔几率。

日常巡检中每班次观察一次筛下物料粒度,若发现筛下物中混杂大量本该截留的粗颗粒,说明堵孔已较严重,应立即安排清理。设备运行相关问题,欢迎联系山鲁重工技术团队:张经理 13583776655(同微信)。


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