Surface tension of flotation solution and its influence on the selectivity of the separation between apatite and gangue minerals

Autor(es)

Martins, M. ^[1] ; Leal Filho, L. S. ^[1] ; Parekh, B. K. ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sch Engn, Mineral Proc Res Grp, Sao Paulo - Brazil

^[2] Univ Kentucky Lexington, Ctr Appl Energy Res, Lexington, KY - USA

• Tipo de documento: Artigo Científico
• Fonte: MINERALS & METALLURGICAL PROCESSING; v. 26, n. 2, p. 79-84, MAY 2009.
• Citações Web of Science: 0

Resumo

This work presents and discusses the influence of the surface tension (gamma(LV)) of methanol/water mixtures on the flotation response of apatite versus gangue minerals conditioned with flotation reagents (75 g/t cornstarch and 100 g/t Berol 867) at pH 10.6. Berol 867 is a collector composed of sodium alkyl sarcosinate plus nonionic surfactant. The highest Schulz efficiency of separation (recovery of apatite minus recovery of gangue) was achieved at approximate to 51.0 mN/m. The critical surface tension of wettability (gamma(C)) of apatite was found to occur at 34.7 mN/m when determined by means of gamma flotation experiments, , and it was 33.9 mN/m when determined by Zisman's approach. (AU)

• Processo FAPESP: 00/01949-4 - Estudo de mecanismos geradores de seletividade na separação apatita/silicatos e apatita/óxidos por flotação aniônica
• Beneficiário: Laurindo de Salles Leal Filho
• Modalidade de apoio: Auxílio à Pesquisa - Regular