Processing of Magnesite Rich Flotation Waste Deposited on a Heap

Abstract

Reverse froth flotation processing was used for beneficiation of magnesite rich material – tailings from processing of primary talc ore. This possible secondary magnesite ore, which contains over 40% MgO and 45,5% loss on ignition (LOI) is stored on a heap. Because of high content of impurities it cannot be directly used. Utilizable magnesite concentrate with 46% MgO, 49,4% LOI (1000°C) and content of SiO2 below 1,5% was prepared in single stage flotation at selected conditions. Yield of magnesite concentrate exceeding 69% could mean significant reduction in amount of stored material.