2015-Sustainable Industrial Processing Summit
SIPS 2015 Volume 10: Mineral & Secondary Battery

Editors:	Kongoli F, Silva AC, Arol AI, Kumar V, Aifantis K
Publisher:	Flogen Star OUTREACH
Publication Year:	2015
Pages:	340 pages
ISBN:	978-1-987820-33-1
ISSN:	2291-1227 (Metals and Materials Processing in a Clean Environment Series)

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Use of Residual Frying Oil as a Collector Reagent in the Ore Flotation

Denilson Costa¹; Mayara Da Costa Lisboa²; Priscila Oliveira³; Andre Carlos Silva⁴; Antonio Peres⁵; Monica Paracampos⁶;
¹UNIVERSIDADE FEDERAL DO SUL E SUDESTE DO PARá, Maraba, Brazil; ², Ouro Pretto, Brazil; ³UNIVERSIDADE FEDERAL DE MINAS GERAIS, Belo Horizonte, Brazil; ⁴UNIVERSIDADE FEDERAL DE GOIAS, Catalao, Brazil; ⁵ENGINEERING FACULTY FEDERAL UNIVERSITY OF MINAS GERAIS, Belo Horizonte, Brazil; ⁶INSTITUTE OF GEOSCIENCES AND ENGINEERING, Maraba, Brazil;
Type of Paper: Invited
Id Paper: 379
Topic: 5

Abstract:

The human consumption of vegetable oils for food in Brazil is very large. However, this consumption causes the downside of not reusing the residual oil, once the vegetable oil, during the frying process, undergoes chemical reactions that modify its composition, increasing the amount of free fatty acids and generating by-products of oxidation reactions. Thus, the problem of this waste disposal arises, which is generally done improperly, going to the sewers of big cities. In the mineral industry, the fatty acids salts (soaps), from the non-ionizable thio compounds class are the anionic collector reagents most used in the non-sulfide minerals flotation process, especially oximinerals. Therefore, the main objective of this research is to evaluate the possibility of using the residual frying oil as a collector reagent in the ore flotation. The advantage of using it as a collector reagent is that a great part of the fatty acids present are free from glycerol, favoring, this way, the alkaline hydrolysis (saponification) reaction for the collector obtainment. In this work, variables that influence the reaction were evaluated, such as time of reaction, water/alcohol ratio, and oil/NaOH ratio. The storage time of the obtained collector (0, 15 and 30 days) was also evaluated. The collection efficiency of the reagent (particles hydrophobicity) was verified by microflotation tests in modified Hallimond tube with height extensor (when necessary) to avoid entrainment, using pure apatite, calcite and quartz. In order to obtain a reference value for the floatability, the tests results were compared to the results obtained using sodium oleate as collector reagent. The results show that the use of a collector reagent obtained via alkaline hydrolysis of residual frying oil may be an alternative to the collector reagents currently used in the mineral industry.

Keywords:

Flotation; Mineral; Waste;


References:

[1] WANG, Q.; WANG, Q. I.; HUAND, Q.; YIN, P. Study on Saponification Technology of Waste Edible Oil. In; Bioinformatics and Biomedical Engineering. ICBBE. 3 International Conference on, p. 1-4. IEEE, 2009
[2] OLIVEIRA, J. A. (2005) Grau de Saponificação de Óleos Vegetais na Flotação Seletiva de Apatita de Minério Carbonatítico. M.Sc. Thesis. Universidade Federal de Ouro Preto: Brazil (in Portuguese).

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Cite this article as:

Costa D, Da Costa Lisboa M, Oliveira P, Silva A, Peres A, Paracampos M. Use of Residual Frying Oil as a Collector Reagent in the Ore Flotation. In: Kongoli F, Silva AC, Arol AI, Kumar V, Aifantis K, editors. Sustainable Industrial Processing Summit SIPS 2015 Volume 10: Mineral & Secondary Battery. Volume 10. Montreal(Canada): FLOGEN Star Outreach. 2015. p. 205-212.