Use of depressants in the direct flotation of a silicate-carbonate phosphate ore

Souza, Adalberto Leles de; Albuquerque, Rodrigo Oscar de; Lameiras, Fernando Soares; Praes, Plínio Eduardo; Peres, Antônio Eduardo Clark

doi:10.1590/s0370-44672014000200010

Cited by 8 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Em razão do consumo elevado e do custo deste reagente, pesquisas estão sendo desenvolvidas acerca da utilização de reagentes alternativos para serem empregados como depressores [17]. Amidos/farinhas provenientes do arroz [18], batata [19], inhame [20], mandioca [21], cana-de-açúcar [22], sorgo [23] e milheto [24] já foram testados como possíveis substitutos ao milho.…”

Section: Materiais E Métodosunclassified

Determinação da relação farinha/NaOH na gelatinização de depressores à luz da microscopia óptica e a sua influência nos testes de flotação mineral

Silva¹,

Silva²,

Silva³

et al. 2022

Tecnol. Metal. Mater. Min.

View full text Add to dashboard Cite

Este é um artigo publicado em acesso aberto (Open Access) sob a licença Creative Commons Attribution, que permite uso, distribuição e reprodução em qualquer meio, sem restrições desde que o trabalho original seja corretamente citado. a ResumoOs amidos são reagentes depressores empregados na flotação mineral a fim de conferir seletividade ao processo. Para tal, necessitam ser previamente gelatinizados, sendo o método alcalino a técnica mais usada na indústria mineral. No Brasil, utiliza-se como álcali o NaOH e a relação farinha/NaOH é um dos parâmetros analisados nesse processo. Embora sejam importantes, os estudos sobre esta temática são escassos na literatura. Diante disso, o trabalho consistiu na determinação da relação farinha/NaOH ideal para a gelatinização de depressores à base de milho, sorgo e milheto e na comprovação da eficácia do processo à luz da microscopia óptica com luz polarizada. Posteriormente, ensaios de flotação com o minério de nióbio usando as farinhas de milho, milheto e sorgo e suas respectivas misturas como depressores foram realizados e os resultados foram comparados com o amido de milho industrial. Os resultados mostraram que os novos depressores propostos consumiram menores quantidades de NaOH para serem gelatinizados em relação ao amido de milho. A etapa de microscopia óptica comprovou o rompimento das cruzes de Malta para todas as farinhas, indicando a completa gelatinização. O melhor depressor de pirocloro foi a farinha de sorgo e os resultados mostraram similaridade estatística em relação ao amido de milho.

show abstract

Section: Materiais E Métodosunclassified

Determinação da relação farinha/NaOH na gelatinização de depressores à luz da microscopia óptica e a sua influência nos testes de flotação mineral

Silva¹,

Silva²,

Silva³

et al. 2022

Tecnol. Metal. Mater. Min.

View full text Add to dashboard Cite

show abstract

“…Performance of residual potato starch as depressant in the direct anionic flotation of phosphate ore are biodegradable, nontoxic, less expensive, and more stable. Starch is the main example of this category (Souza et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Performance of residual potato starch as depressant in the direct anionic flotation of phosphate ore

Carneiro,

Santos,

Alves

et al. 2024

R. G. Secr.

View full text Add to dashboard Cite

The search for environmentally friendly reagents with high efficiency, high selectivity, and low cost has intensified in the mining sector in recent years. The use of depressants from alternative and renewable sources is an option to be considered. Thus, the purpose of this study was to evaluate the use of residual potato starch pulp (RPSP) generated by the food industry as a depressant in phosphate ore flotation by comparing its performance with that of commercial, waxy corn starch (CWCS), rich in amylopectin. To this end, eight flotation tests were performed in duplicate using the Denver mechanical cell. The results showed significant variations for flotation in the collector dosage and starch-type parameters. The increase from 150 to 350 g/t in the collector dosage promoted an approximately 18% increase in metallurgical recovery using 500 g/t of RPSP starch (an increase from 73.09% to 86.16%). The response optimization statistical tool showed that RPSP and collector dosages should be 500 and 226.77 g/t, respectively, to maximize the P2O5 content and metallurgical recovery. These results suggest that it is feasible to use RPSP in phosphate ore flotation, opening new fields of investigation regarding the use of more accessible and economical depressants.

show abstract

“…This scenario led to the development of technologies, so that it would be possible to make better use of this more complex ore. Thus, there are studies seeking to optimize concentration routes, which allow the production of phosphate concentrates within the market specifications for fertilizer production (SOUZA et al, 2014;GUIMARÃES et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…To work around this situation, reagents have been developed so that flotation presents selectivity. Studies such as those performed by Souza et al (2014), Oliveira (2007), Carneiro (2018), Carneiro et al (2021), Guimarães et al (2004), Martins et al (2019), Oliveira et al (2019), among many others presented in the literature, bring fundamental studies, in addition to analyzing the performance of collectors and depressants. They show this scientific initiative in the search for optimal conditions in phosphate ore flotation operations.…”

Section: Introductionmentioning

confidence: 99%

Alternative Reagents in Phosphate Ore Flotation

Oliveira¹,

Santos²,

Souza³

et al. 2023

JER

View full text Add to dashboard Cite

To meet the growing demand for fertilizers, strategic in food production, efficient ways of concentrating its main raw material, phosphate rock, are essential. Moreover, when the phosphate ore has carbonated gangue, such as the mineral deposit of Araxá-MG, there is a selectivity difficulty in separating the mineral species, impairing the flotation performance. The search for reagents that present selectivity, low cost and high availability has been the subject of research. Thus, the objective of this work was to evaluate a depressor reagent (starch residue) and collector reagents (Amazon oil from Andiroba and Hydrocol) in the flotation of phosphate ore. For this, the previously characterized ore was subjected to flotation tests in a bench mechanical cell. The independent variables evaluated were type of collector, collector dosage and depressant dosage, with two levels and central point, according to the factorial design. The results revealed that Hydrocol, at minimum dosage levels, provided concentrates with higher P2O5 content (17.78%) and metallurgical recovery (66.29%). However, the Amazonian oil, at maximum dosage levels, presented similar contents, but with lower recovery values, indicating that it is a selective reagent and showing promise, considering that the oil is a residue of industrial processes.

show abstract

Use of depressants in the direct flotation of a silicate-carbonate phosphate ore

Cited by 8 publications

References 3 publications

Determinação da relação farinha/NaOH na gelatinização de depressores à luz da microscopia óptica e a sua influência nos testes de flotação mineral

Determinação da relação farinha/NaOH na gelatinização de depressores à luz da microscopia óptica e a sua influência nos testes de flotação mineral

Performance of residual potato starch as depressant in the direct anionic flotation of phosphate ore

Alternative Reagents in Phosphate Ore Flotation

Contact Info

Product

Resources

About