Avaliação de amidos de milho alternativos na microflotação de hematita e quartzo
Evaluation of alternative corn starches in hematite and quartz microflotation
Débora Nascimento Sousa; Luís Alberto Silva; André Carlos Silva; Elenice Maria Schons Silva
Resumo
As jazidas de alta qualidade estão se tornando escassas globalmente, impulsionando as mineradoras a investir em tecnologias para aproveitar melhor os recursos minerais. Os minérios atuais são mais pobres e distribuídos em granulometrias mais finas, levando a um aumento no estudo dos reagentes usados na técnica de flotação mineral, uma das principais operações para concentrar minerais finos. O objetivo desse estudo foi comparar a aplicação de três tipos diferentes de amidos derivados do milho, variando suas dosagens, nos testes de microflotação de hematita e de quartzo. Os amidos de milho alternativos mostraram níveis mais elevados de amilopectina em comparação com o amido de milho convencional, sendo o HIPIX100 o que apresentou o teor mais alto desse componente. Observou-se que tanto o tipo quanto a dosagem do depressor, assim como a interação entre eles, tiveram influência estatisticamente significativa nas respostas de flotabilidade da hematita e do quartzo. Os resultados sugerem o HIPIX101 como o reagente mais promissor quando comparado com o amido de milho convencionalmente empregado na indústria mineral brasileira.
Palavras-chave
Abstract
High-quality deposits are becoming scarce globally, driving mining companies to invest in technologies to make better use of mineral resources. Current ores are poorer and distributed in finer grain sizes, leading to an increase in the study of reagents used in the mineral flotation technique, one of the main operations to concentrate fine minerals. The objective of this study was to compare the application of three different types of corn-derived starches, varying their dosages, in hematite and quartz microflotation tests. Alternative corn starches showed higher levels of amylopectin compared to conventional corn starch, with HIPIX100 having the highest content of this component. It was observed that both the type and dosage of the depressant, as well as the interaction between them, had a statistically significant influence on the flotability responses of hematite and quartz. The results suggest HIPIX101 as the most promising reagent when compared to corn starch conventionally used in the Brazilian mineral industry.
Keywords
Referências
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Submetido em:
26/09/2023
Aceito em:
21/11/2023
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