Ms. Celik et al., FLOTATION OF HETEROCOAGULATED PARTICULATES IN ULEXITE SDS/ELECTROLYTESYSTEM/, Journal of colloid and interface science (Print), 203(2), 1998, pp. 254-259
Salt-type minerals can be usually floated with either anionic or catio
nic collectors. In a number of systems, flotation has been reported to
remarkably increase above the concentrations where precipitation of t
he collector salt is initiated. Some studies attribute this phenomenon
to heterocoagulation of oppositely charged colloidal precipitate and
mineral particles. In this study, ulexite, a semisoluble boron mineral
, in the presence of various multivalent ions, i.e. Ba2+, Mg2+, Ca2+,
and Al3+, was found to exhibit excellent flotation even when particles
, colloidal precipitates, and bubbles acquire a similar charge, which
indicates that attractive structural forces exceed the forces of elect
rostatic repulsion. (C) 1998 Academic Press.