The invention provides a preparation method and application of an
ilmenite collecting agent, and the
ilmenite collecting agent comprises, by
mass concentration, 4%-12% of higher
fatty acid, 15%-30% of a complexing agent, 5%-7.5% of
sodium hydroxide, 1%-3% of a surfactant and 47.5%-75% of water. Wherein the higher
fatty acid is modified
oleic acid or a mixture of
oleic acid and modified
oleic acid; the modified oleic acid is 9-hydroxy
octadecenoic acid or 10-hydroxy
octadecenoic acid. The modified oleic acid is prepared from concentrated
sulfuric acid, oleic acid and a
sodium hydroxide solution. And the
freezing point of the collecting agent is increased through the modified oleic acid, and the low-
temperature resistance is improved. And when the pH is 2.5, the
recovery rate of
titanium dioxide reaches 60% or above after the collecting agent is added, and the
acid resistance of the collecting agent is improved. The surfactant can stabilize foam, wet the mineral surface and reduce the mineral
surface tension. The complexing agent can provide
high selectivity and collecting capacity, and the technical problem that
titanium concentrate and
gangue minerals are difficult to efficiently separate through a conventional flotation
reagent is solved. The preparation method is simple and easy for large-scale production.