Screening device for screening of sand or water mixture, has feeding device comprising multiple feeding slides arranged one above other for feeding mixture on different positions of screen

摘要

A screening device (20) has a screen (30), a supply for mixture, and a feeding device for conduction of the mixture on the screen. The feeding device comprises multiple feeding slides (22) arranged one above the other for feeding the mixture on different positions of the screen, where the screen is positioned diagonally. Independent claims are also included for the following: (1) a precipitation device for the precipitation of fine particles from a sand or water mixture; (2) a system for the preparation of sand; (3) screening of sand or water mixtures; and (4) the preparation of fine particles from a sand or water mixture.