"Fine particle flotation for Florida dolomitic phosphate pebbles" by Zhengxing Gu

Semester

Summer

Date of Graduation

2002

Document Type

Thesis

Degree Type

MS

College

Statler College of Engineering and Mineral Resources

Department

Mining Engineering

Committee Chair

Felicia F. Peng.

Abstract

A Florida dolomitic phosphate pebble sample was processed using a 1.2 liter stirrer-tank flotation cell and 2-in ID packed flotation column aiming at achieving a phosphate concentrate containing more than 30% P2O 5 and less than 1.0% MgO contents at high P2O5 recovery.;The characteristics of fatty acid collector, FA-12 and a newly developed PA-31 collector were evaluated for frothability and dolomite flotation rate. The evaluation results show that both reagents have high frothability, but PA-31 has much stronger frothability than FA-12, and higher selectivity in separating dolomite from phosphate mineral.;The mineralogical study indicates that the phosphate pebble sample needs to be ground to minus 150 mum (-100 mesh) for liberation of dolomite from phosphate. For the stirrer-tank cell, the composite phosphate concentrate has 31.66% P2O5 and 0.79% MgO at the overall P 2O5 recovery of 92%. For packed column flotation, the composite phosphate concentrate has 30% P2O5 and 0.96% MgO at the overall P2O5 recovery of 91%.

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