EARTH

[3812-23-07] a review of heterocoagulation and galvanic interaction of sulfide minerals

○Sophea - Seng¹, Motoya kojima ¹, Kontani Yusuke¹, Carlito Baltazar Tabelin ¹, Mayumi Ito ¹, Naoki Hiroyoshi¹ (1. Hokkaido University )

司会（Chairman）：Richard Alorro (Curtin University)

キーワード：heterocoagulation, galvanic interaction, sulfide minerals

Heterocoagulation refers to the formation of colloidal particles with different properties in a suspension. The differentiation of particles could be based on composition, shape, size and surface potential or charge. Heterocoagulation plays an important role in minerals flotation. During the flotation the minerals that have different surface properties attached to one another forming new surface properties of the particle which lead to effect recovery of mineral. Galvanic interaction occurs when two metals with different rest potentials interact with one another. The metal with lower rest potential will act as an anode and is oxidized while another one with higher rest potential will become the cathode. Galvanic interaction is very important in ore processing. In flotation, galvanic interaction affects the flotability of the mineral due to the surface coating on mineral and the effect depends on many factors such as mineral/solution ratio. Moreover, in hydrometallurgy, the study of several leaching and bioleaching showed that galvanic interaction enhanced the leaching rate of metal recovery from different mineral and also affect the mechanism of sulfide dissolution. In this paper heterocoagulation and galvanic interaction of sulfide minerals is a reviewed from the researched that had been conducted over the past years.