Flotation process for recovering feldspar from a feldspar ore

摘要

A flotation process for separating feldspar from quartz within a feldspar ore, wherein a specific combination of flotation reagents is used under acidic conditions, in the absence of hydrofluoric acid. The flotation process comprises the steps of (1) forming an aqueous suspension of a feldspar feed in the presence of a flotation reagent comprising an amine containing a C 8 -C 50 aliphatic hydrocarbon chain and an alcohol containing a C 8 -C 50 aliphatic hydrocarbon chain, preferably at a pH ranging from 1.3 to 3.0, (2) agitating the obtained suspension to produce a feldspar containing fraction, and (3) separating a feldspar containing fraction. The process offers the advantage of environmental and operational safety, avoiding the use of HF, at the same time providing good recovery levels and high selectivity towards feldspar.