| Titre : | Separation of silica from bauxite via froth flotation (2009) |
| Auteurs : | C.P. Massola, Auteur ; A. P. Chaves, Auteur ; J.R.B. Lima, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Minerals engineering (Vol. 22 N° 4, Mars 2009) |
| Article en page(s) : | pp. 315–318 |
| Note générale : | Génie Minier |
| Langues : | Anglais |
| Index. décimale : | 622 (Industrie minière) |
| Tags : | Froth flotation Non-ferrous metallic ores Tailings |
| Résumé : | This paper reports an innovative development: concentrating gibbsite via reverse froth flotation in order to obtain a metallurgical-grade bauxite concentrate. Tailings from an industrial plant have undergone attrition scrubbing and desliming; the quartz silica contained in the tailings has undergone flotation. Starch was used as a depressant, and ether-amine as the cationic collector. Optimum pH is around 10.0. In pilot plant scale, a metallurgical-grade concentrate was obtained by assaying 42.3% available alumina with an alumina/insoluble silica mass ratio of 11.1. It contained the gibbsite and the iron and titanium bearing minerals. The concentrate was further upgraded by magnetic separation, leading to 54.0% available alumina, with an alumina/insoluble silica mass ratio of 12.6 at an overall available alumina recovery of 69.3% in the final concentrate (non-magnetic product). |
| DEWEY : | 622 |
| ISSN : | 0892-6875 |
| En ligne : | http://www.sciencedirect.com/science/article/pii/S0892687508002264 |
