Development of a Technological Complex for Washing Sand

Abstract

A technological complex was developed in order to remove clay minerals, iron oxide, and fractions heavier than 2.9 tons/m³ from glass quartz sands. The basis of the scheme of the apparatus chain of the complex consists of a trammel screen with a new design, jigs, and concentration tables with electromagnetic inductors. It was shown under laboratory conditions that sand in the highest demand — VS-030-V grade — was obtained from sands containing (by weight): 97.32% SiO₂, 0.92% Al₂O₃, 0.43% Fe₂O₃, 0.11% TiO₂, and 0.04% Cr₂O₃. A distinguishing feature of the technological scheme of gravity separation of sands is the counterflow motion of the initial feed and the heavy fraction.