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Flotation of ilmenite using benzyl arsonic acid and acidified sodium silicate

1989; Elsevier BV; Volume: 26; Issue: 1-2 Linguagem: Inglês

10.1016/0301-7516(89)90046-x

1879-3525

Quanyuan Song, Shirley C. Tsai,

Extraction and Separation Processes

An ilmenite concentrate of 47.4% TiO2 has been obtained by froth flotation of an ilmenite ore containing 9% TiO2 using acidified sodium silicate as a gangue depressant and benzyl arsonic acid as the collector. The acidified sodium silicate forms negatively charged colloidal silica that is selectively adsorbed on the gangue minerals, but does not affect the adsorption of benzyl arsonic acid on ilmenite. The resulting TiO2 recovery reaches a maximum of 57% at the pH value that corresponds to the zero point of charge of ilmenite in the presence of benzyl arsonic acid.