Flotation method for antimony - mayukhportfolio.co. Patent US4081364 - Froth flotation method for stibnite - Google 28 Mar 1978 Disclosed is a process for concentrating stibnite (antimony sulfide) and separating it from iron sulfide minerals such as pyrite by froth flotation.May 04, 2012 The technology of concentration of the sulfide antimony-arsenic gold-bearing ore containing 3.6 g tn Au, 0.3 Sb, and 0.4 As is developed. This technology implies the flotation separation of antimonite and arsenopyrite into separate products and allows them to perform in various cycles, increasing production efficiency due to a decrease in consumption of sulfuric acid for bacterial.