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The Efficiency Change of Spiral Classifier with Different Overflow Discharge Methods

机译：螺旋分级机不同溢流方式的效率变化

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摘要

The basic structure,classification principle and low efficiency of the traditional spiral classifier were analyzed.The trial industrial comparative experiment was carried out by using ψ300x4500 spiral classifier with the two-sided overflow and the port side overflow at the same parameter.The experimental results showed that,the qualified fine materials could overflow with the shortest distance by using two-sided overflow method,which avoided circulation circuit of fine materials and reduced the content of-200 mesh fine materials in the sinking sand down lower 2-5 percentage points compared with the port side overflow.At the same time,adjusting the overflow emissions height of two-sided overflow could delay the settling time of coarse mineral which reduced the content of +200 mesh materials of the overflow discharge lower 5-8 percentage points than the port side overflow.Compared with the port side overflow,the classification efficiency was improved about from 40％ to 60％,and the average increase rate was up to 17％.The improvement of overflow discharge can be used not only for the adjusting of present spiral classifiers but also for making new machines,which is of a significant application prospect.
机译：分析了传统螺旋分级机的基本结构，分级原理和低效率。采用ψ300x4500螺旋分级机在两侧溢流和左舷溢流相同的条件下进行了工业对比试验，实验结果表明采用双面溢流法，可以使合格的细粒物料以最短的距离溢流，避免了细粒物料的循环回路，使沉砂中-200目细粒物料的含量降低了2-5个百分点。同时，调节两侧溢流口的溢流排放高度可以延缓粗矿物的沉降时间，从而使溢流口+200目物料的含量比港口降低了5-8个百分点。与左舷溢流相比，分级效率从40％提高到60％，平均溢流率的提高不仅可用于现有螺旋分级机的调节，而且可用于制造新机器，具有重要的应用前景。

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