Superfine silicon powder ball-milling grading system

Abstract

The invention relates to a superfine silicon powder ball-milling grading system. The superfine silicon powder ball-milling grading system comprises an intermittent ball mill, a grader and a dust collector. A feeding device is arranged between a discharging port of the intermittent ball mill and a feeding port of the grader. The feeding device comprises a support and a discharging bin arranged on the support. A discharging bin discharging port is formed in the bottom of the discharging bin, and a feeding shaft is arranged in the discharging bin discharging port. A feeding motor connected with afeeding shaft is arranged on the support, and a feeding spiral blade capable of rotating along with the feeding shaft is arranged on the feeding shaft. A rotatable arch breaking shaft is arranged atthe position, located above the feeding shaft, in the discharging bin, and an arch breaking paddle capable of rotating along the arch breaking shaft is arranged on the arch breaking shaft. The arch breaking paddle is located above the feeding spiral blade and does not interfere with the feeding spiral blade. An arch breaking motor connected with the arch breaking shaft is arranged on the support.The superfine silicon powder ball-milling grading system is more reasonable and more reliable in performance.

Description

technical field [0001] The invention relates to a ball mill classification system for ultrafine silicon micropowder. Background technique [0002] In the existing ball mill classification system consisting of a batch ball mill and a classifier, during the feeding process of the classifier, as the time increases, the problem of quartz powder blocking is prone to occur. At the same time, there will be a small amount of grinding medium below 10mm in the quartz powder discharged from the ball mill. If it is directly sent to the classifier through the feeding device, the ceramic classifying wheel of the classifier may be damaged, or the discharge valve at the outlet of the classifier may be stuck. . In addition, the sieve plate on the existing batch ball mill is not reasonable enough in structure, there is metal pollution on the metal sieve plate made of round steel and the like, and it is easy to break after long-term high-intensity impact, while the ceramic sieve plate is easy...

AI Technical Summary

Problems solved by technology

If the cutting particle size is 60um, its classification efficiency can reach more than 80%, and most of the products can be recovered by direct classification according to the conventional method; if high-end ultra-fine powder products need to be produced, coarse particles above 20um need to be cut, and the cutting particle size is set to 20um. At this time, the classification efficiency of the classifier is 50-60%. According to the conventional method, direct classification can only recover up to 57% of the products, which will cause a considerable part of the waste of products.

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