The SiO2 H2O interface and effects on quartz activation in flotation system

• The correlation between surface complexation at the SiO2-H2O interface and quartz flotation behavior was studied. Computer assisted calculations, using the programs SOLGASWATER, were adapted to construct distribution diagrams of surface speciation in the SiO2-metal ion-H+ system in aqueous solutions. Equilibrium constants for both surface and solution reactions were introduced in the composition matrix. Surface complexation, surface change and flotation results were compared and a good agreement was obtained. Furthermore, flotation mechanisms of quartz activation by common metal ions like Ca2+ , Mg2+ , Fe3+ are quantitatively discussed based on the surface reaction equilibrium constants.

Ämnesord

NATURVETENSKAP  -- Kemi -- Fysikalisk kemi (hsv//swe)

NATURAL SCIENCES  -- Chemical Sciences -- Physical Chemistry (hsv//eng)

Nyckelord

surface complexation

Sio2-H2O interface

quartz flotation

Chemistry of Interfaces

Gränsytors kemi

Publikations- och innehållstyp

ref (ämneskategori)

art (ämneskategori)