Gravel material multistage screening and crushing method

Abstract

The invention discloses a gravel material multistage screening and crushing method, and belongs to the technical field of gravel crushing. The gravel material multistage screening and crushing methodis characterized by comprising the following steps that a, gravel materials are conveyed to a screening work station; b, primary screening is carried out through a first-grade screening net, the gravel materials with the large particle size fall into a crushing station, the crushed gravel materials are conveyed to a second-grade screening net for horizontal swinging and screening, the screened gravel materials fall into a third-grade stage screening net, and the screened gravel materials are vibrated and screened through the third-grade screening net; and c, the gravel materials subjected to the third-stage screening fall into a material returning bin, the gravel materials falling from the material returning bin are conveyed into a crushing cylinder of a material crushing device through amaterial returning conveying part for circulation crushing. According to the method, the whole crushing process is easy to control, materials with different particle sizes can be crushed just by one material crushing device, the materials are conveyed into the material crushing device to be crushed through multistage screening, continuous production can be carried out, the crushing efficiency andthe yield are improved, and popularization and application are facilitated.

Description

technical field [0001] The invention relates to the technical field of sand and gravel crushing, in particular to a multistage screening and crushing method for sand and gravel materials. Background technique [0002] In the crushing of hard ore and building aggregates, crushers are often used. The material needs to be screened before the crusher crushes the material. [0003] Therefore, the screening and crushing of materials are completed by two processes and two processing equipment. Usually, the bulk material to be broken is screened out by a sieving machine, and then processed to the required particle size by the crusher. The screening machines used include fixed screens, vibrating screens, probability screens and roller screens. [0004] Crushers include jaw, toothed roller, impact and hammer crushers. These screening and crushing machines have different advantages and disadvantages in actual production operations. From the perspective of screening and crushing pr...

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Problems solved by technology

[0006] The screening and crushing integrated machine disclosed in this patent document, although vertical shaft crushers with different frequencies and rotating speeds are respectively connected to the coarse material outlet and the fine material outlet, so that materials with different particle sizes and characteristics enter different crushing chambers to achieve different crushing chambers. The crushing effect, however, requires two vertical shaft crushers, and the two vertical shaft crushers work together to complete the crushing of materials with different particle sizes. Once one of the vertical shaft crushers fails, the screening and crushing of materials will be interrupted, resulting in poor production continuity. , affecting crushing efficiency and output

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