电磁干粉磁选机给料含水率超标会怎样?


发布时间:

2026-10-22

电磁干粉磁选机在石英砂干法提纯中用于微粉除铁,但不少客户忽略了给料含水率这个指标。物料水分超标时,磁选机看似正常运转,除铁效果却在悄悄打折,成品铁含量时不时冒超

电磁干粉磁选机在石英砂干法提纯中用于微粉除铁,但不少客户忽略了给料含水率这个指标。物料水分超标时,磁选机看似正常运转,除铁效果却在悄悄打折,成品铁含量时不时冒超标。

电磁干粉磁选机给料含水率超标会怎样?.jpg

含水率超过1%,细粉就开始结团黏附。 干法磁选的磁场作用前提是物料颗粒彼此分散、能自由通过磁场区。水分超标后细粉结成小团粒,团粒内部包裹的磁性杂质被屏蔽在磁场作用范围之外,随团粒一起进入精矿。更麻烦的是,潮湿物料容易黏附在磁介质和磁辊表面,形成一层物料壳,磁力线穿透受阻,吸附能力进一步下降。建议在磁选机前安装在线水分检测仪,或每班次取样烘干检测,确保入料含水率控制在1%以下。

水分超标时磁介质清理周期会明显缩短。 正常工况下磁介质每周清理一次即可,含水率超标时细粉黏附速度快,两三天磁介质缝隙就被堵满,需要频繁停机清洗。可适当缩短清理周期作为临时应对,但根本解决办法还是从源头控制物料水分,在磁选机前增设热风干燥装置或延长前端烘干时间。

物料温度高加上水分超标,结团更严重。 烘干机出料温度偏高时直接进入磁选机,热物料遇冷空气在设备内部结露,细粉黏附加剧。建议在烘干机与磁选机之间留一段自然冷却输送段,待物料温度降至40℃以下再进入磁选。

日常巡检中注意观察磁介质表面是否出现结团或黏附,发现清理周期明显缩短时,先查给料含水率。设备运行遇到问题,欢迎联系山鲁重工技术团队沟通交流:张经理 13583776655(同微信)。


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