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Technical note bench scale flotation of a brazilian monazite ore

1994; Elsevier BV; Volume: 7; Issue: 12 Linguagem: Inglês

10.1016/0892-6875(94)90047-7

1872-9444

Osvaldo Pavez, Antônio Eduardo Clark Peres,

Minerals Flotation and Separation Techniques

Preliminary studies of the floatability characteristics of monazite, zircon and rutile, performed in a modified Hallimond tube, initiated a bench scale investigation of the flotation of a Brazilian monazite ore from Sao Goncalo do Sapucai, MG. The testwork was conducted with the utilisation of a commercial hydroxamate and sodium oleate as collectors and sodium metasilicate as depressant. In all tests, the best collector/depressant ratio defined during the microflotation experiments was confirmed at bench scale. The results indicated that with both collectors it is possible to produce a high purity cleaner monazite concentrate (> 60% RE2O3). The concentrations of collector and depressant must be well defined to prevent a significant increase in the flotation of gamgue minerals such as ilmenite, zircon and rutile, causing contamination of the monazite concentrate.