A sorting method and sorting device for impurities in granular materials

Abstract

Provided are a method for separating impurities out of particle materials and a separation device. Material mixtures to be separated are bundled to be columnar to be dumped towards the top of a cone continuously at initial speed, the material mixtures slide off along the conical face of the cone, the thickness of the material mixtures is reduced through the conical face with the diameter gradually increased in the sliding process, and the material mixtures dynamically wrap the conical face in a film shape till the material mixture slide off to the bottom of the cone and continue to fall off along the outer edge of the bottom of the cone in the shape of an annular curtain waterfall. The separation device adopting the method comprises a material thinning top and a particle collecting bin which are vertically arranged, the material thinning top is in the shape of the cone with an upward sharp end, an opening of a feeding port in the top of the particle collecting bin exactly faces the conical bottom of the material thinning top, the position, on the outer side of the feeding port, of the side wall of the particle collecting bin is obliquely turned downwards to form an unloading skirt plate, and a discharging port in the bottom of the particle collecting bin is provided with a negative-pressure exhaust assembly. The method and device are high in separation efficiency and good in effect. The device is simple in structure and good in reliability, and coarse materials can be separated continuously and efficiently.

Description

technical field [0001] The invention relates to the field of material sorting, in particular to a method and device for sorting impurities in granular materials. Background technique [0002] Wood-based panels are boards or molded products that are made of wood or other non-wood plants, separated into various unit materials by certain mechanical processing, and glued with or without adhesives and other additives. [0003] During the processing of some types of wood-based panels, it is necessary to sort the crushed material particles, select material particles with suitable volume and density, and separate them from those with excessive volume, density, or bulk density. Materials are separated. [0004] Most of the current sorting devices are linear vibrating screens, rotary vibrating screens, etc. The basic principle is to separate small particles of materials through the vibration of the screen. To separate large material particles, it is necessary to use a centrifuge to ...

AI Technical Summary

Problems solved by technology

[0004] Most of the current sorting devices are linear vibrating screens, rotary vibrating screens, etc. The basic principle is to separate small particles of materials through the vibration of the screen. To separate large material particles, it is necessary to use a centrifuge to further separate the material particles, and further sort out material particles with suitable volume and density. Not only are there many sorting steps, but also the structure of the sorting device is relatively complicated, and maintenance is relatively complicated. Troublesome, not conducive to the continuity and high-efficiency sorting of coarse materials

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