Tecnologia em Metalurgia, Materiais e Mineração
https://tecnologiammm.com.br/article/doi/10.4322/2176-1523.20181525
Tecnologia em Metalurgia, Materiais e Mineração
Artigo Original

APATITE BIOFLOTATION USING SPENT YEAST (SACCHAROMYCES CEREVISIAE) CELLS AS COLLECTOR

BIOFLOTAÇÃO DE APATITA UTILIZANDO LEVEDURA CERVEJEIRA (SACCHAROMYCES CEREVISIAE) SAPONIFICADA COMO COLETOR

André Carlos Silva, Diego Valentim Crescente Cara, Elenice Maria Schons Silva, Geraldo Sadoyama Leal, Alex Malüe Machado, Lucas Martins da Silva

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Resumo

The main source of phosphate in Brazil are igneous rocks, which need to be concentrated through froth flotation to separate phosphate ore from the other minerals. Searching for new sources of reactants to be used in mineral processing, spent yeast cells (SYC), from a local brewery was tested. Saccharomyces cerevisiae was choose because its relative easy industrial grow, has no biological risk and can be found worldwide. Microflotation experiments were conducted in a modified Hallimond’s tube with high purity apatite mineral samples at pH 10 in order to investigate the influence of the collector dosage in the mineral recovery. The results showed that despite SYC has had lower recovery than collectors industrially adopted, it has a potential future use in mineral flotation as a cheap, biodegradable, eco-friendly, and sustainable reagent with no acquisition cost since the brewery complex is located less than 30 km from Catalão and Ouvidor mine sites in Brazil.

Palavras-chave

Bioflotation; Spent yeast cells; Flotation reagent.

Abstract

A principal fonte de fosfato no Brasil é a rocha ígnea, que precisa ser concentrada através da flotação no intuito de separar o minério de fosfato dos outros minerais. À procura de novas fontes de reagentes a serem utilizadas no processamento de minerais, as células de levedura de cerveja gastas (SYC) provenientes de uma cervejaria local foram testadas. A espécie Saccharomyces cerevisiae foi escolhida devido ao seu fácil crescimento industrial, não possuir risco biológico e poder ser encontrada em todo o mundo. Experimentos de microflotação foram conduzidos em um tubo de Hallimond modificado em pH 10 com amostras de apatita de alta pureza a fim de investigar a influência da concentração do coletor na recuperação do mineral. Os resultados mostraram que apesar das SYC terem uma recuperação menor do que coletores adotados industrialmente, estas possuem potencial para uso futuro na flotação mineral, se apresentando como um reagente barato, biodegradável, ecológico e sustentável, sem custo de aquisição, uma vez que o complexo da cervejaria fica a menos de 30 km das minas nas cidades de Catalão e Ouvidor, Brasil.

Keywords

Bioflotação; Levedura de cerveja gasta; Reagente de flotação.

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