Pulp dispersion in selective desliming of iron ores

摘要: Abstract In the upgrading of finely disseminated iron ores, selective desliming is a critical step prior to flotation. A prerequisite for properly dispersed pulp; sodium silicate commonly used as dispersant. The mechanism by which pulp dispersion attained means in presence calcium ions and magnesium hydroxide precipitates was examined settling tests, abstraction flocculation tests electron microscope observations. Flocculation disperson regions quartz functions calcium, levels were delineated. Pulps consisting artificial mixtures goethite nonselectively on addition silicate. At low levels, corn starch aided over quartz; at higher ineffective. model presented explain these species.