COMPLEX FOR SIZING CRUSHED UNDERSIZE PRODUCTS IN PRODUCTION OF NONMETALLIC CONSTRUCTION MATERIALS Russian patent published in 2012 - IPC B07B4/00 

FIELD: process engineering.

SUBSTANCE: invention relates to equipment intended for production on nonmetallic construction materials and may be used for production of gravel and sand from grinding-sorting plants processing igneous rocks. Proposed complex comprises rock feed vibrating screen with solid sheet secured to its underscreen frame, chamber with separation walls provided with rotary appliances and accumulation funnels for sixing rocks, compressed air feed source to feed compressed air into said chamber at acute angle to screen surface, suction branch pipe arranged at chamber top and communicated via pipeline with compressed air source suction branch pipe. Said separation walls represent rectangular cross-section channels accommodating tube with lengthwise lot cutout at tube top section and web at its center. Every said separation wall is equipped with hinge with its pin aligned with tube axis to turn said wall in vertical plane. Separation wall height h decreases at pitch / as said wall extends from the screen. Every separation wall is coupled with complex frame by tie rod with screw coupling. Every tube is communicated on both sides via corrugated branch pipes and air control valves with compressed air feed source delivery pipes. Said source is made up of two fans or one compressor. All separation walls in initial position are inclined from screen at angle a defined by size of target fraction. First separation wall top edge is arranged under screen discharge edge.

EFFECT: higher efficiency and accuracy.

4 dwg