Abstract SYMPHOS 2011
Abstract SYMPHOS 2011
Abstract SYMPHOS 2011
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PILOT SCALE DIRECT FLOTATION OF A PHOSPHATE ORE<br />
WITH SILICATE-CARBONATE GANGUE<br />
BN-O-02<br />
Rodrigo O. Albuquerque1 , José A. Aquino1 , Carlos A. Pereira2 ,Antonio E. C.<br />
Peres3 1 CDTN/CNEN BRAZIL,<br />
2 UFOP, BRAZIL<br />
3 UFMG, BRAZIL<br />
The present pilot scale study addresses the direct flotation route for the concentration of a phosphate ore bearing<br />
a silicate-carbonate gangue. The target was to selectively separate apatite from the contaminating silicate<br />
minerals and, especially, carbonates, using flotation columns. Based on the results of a previous laboratory scale<br />
investigation, a reagents scheme was selected and tested, consisting in the use, under alkaline conditions, of corn<br />
starch and a natural collector extracted from the distillation of coconut oil. An open rougher-cleaner circuit yielded<br />
a final concentrate reaching 30.5% P 2 O 5 grade, at 80.8% recovery level.<br />
EVALUATION OF DEPRESSANTS FOR PHOSPHATE<br />
ORE BEARING SILICATE-CARBONATE GANGUE<br />
Miessa F. de Souza 1 , Gilmara M. Lopes 2 , Michelle dos Santos Oliveira 3 ,<br />
Antonio E. C. Peres 4 , Carlos A. Pereira 5 ,<br />
UFOP Ouro Preto/BRAZIL<br />
BN-O-03<br />
The fertilizer use has increased significantly due to the growth of food consumption by the population. It was<br />
necessary, thus, the development in the Brazilian fertilizer industry to improve the beneficiation of phosphate<br />
concentrate. The treatment of phosphatic silicate-carbonate ore is of great interest since it refers to the use of the<br />
deposit of the Alkaline Complex of Catalão - GO, which represents 45% of the reservation. However, the separation<br />
of phosphates and carbonates, classified as sparingly soluble, it is difficult, mainly due to the similarity of their<br />
chemical properties of surface. This study aimed to evaluate different depressants in pure mineral apatite and<br />
calcite, through microflotation tests in Hallimond modified tube. The reagents used were sodium oleate as anionic<br />
collector, in proportion 5:1 starch, carboxymethylcellulose (CMC), guar gum, tannin, dextrin, as depressants, and<br />
sodium hydroxide and hydrochloric acid as pH regulators. This study was conducted in laboratory scale and showed,<br />
among other results, a good performance carboxymethyl starch and selectivity of phosphatic ore.<br />
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