Separation of silica from bauxite via froth flotation

Massola, Camila Peres; Chaves, Arthur Pinto; Lima, José Renato Baptista de; Andrade, Christian Fonseca de

doi:10.1016/j.mineng.2008.09.001

Cited by 43 publications

(8 citation statements)

References 4 publications

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“…The ore from Lages city, Brazil, shows Al 2 O 3 content higher than 50%, proving its refractory properties. The chemical analysis of the natural bauxite showed the need of a previous treatment of the raw bauxite because its iron content is quite above the typical content for application in the refractory production (Mergen 2004;Wang et al 2004;Zafar 2008;Massola et al 2009). The previous results of the leaching process using hydrochloric acid prove that the natural bauxite can be adjusted to produce high quality refractories.…”

Section: Resultsmentioning

confidence: 99%

Mineralogical and Physical–Chemical Characterization of a Bauxite Ore from Lages, Santa Catarina, Brazil, for Refractory Production

Aquino

Riella

Bernardin

2011

Mineral Processing and Extractive Metallurgy Review

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Section: Resultsmentioning

confidence: 99%

Mineralogical and Physical–Chemical Characterization of a Bauxite Ore from Lages, Santa Catarina, Brazil, for Refractory Production

Aquino

Riella

Bernardin

2011

Mineral Processing and Extractive Metallurgy Review

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“…Auf Basis einer umfangreichen Literaturrecherche konnten als mögliche Aufbereitungsverfahren die Dichtesortierung, die Magnetscheidung, die �lotation und die sensorgestützte Sortierung identifiziert werden [5][6][7][8][9]13,14,17,[20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35] . Die chemische und biologische Laugung und Sonderverfahren -etwa die selektive �lockung, die Sulfidierung und Chlorierung -wurden im Rahmen der nachfolgenden Untersuchungen nicht näher betrachtet [36][37][38][39][40][41][42] .…”

Section: Aufbereitung/verarbeitungunclassified

Zur Aufbereitung von Bauxiten unter besonderer Berücksichtung der Rohgut-Charakterisierung

Bauer-Vasko

Nilica

Flachberger

2010

Berg Huettenmaenn Monatsh

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“…Most of the Brazilian bauxite processing plants employ operations of comminution, classification and solid-liquid separation. A very few processes include gravimetric concentration in order to remove silicates, or magnetic separation to decrease the amount of Fe-bearing minerals [1,5,6].…”

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confidence: 99%

“…In order to feed the metallurgical process, the bauxite needs to display available alumina content (AA) > 30%, reactive silica (RS) < 5% and iron content (Fe) < 30%. Likewise, the Al 2 O 3 /SiO 2 ratio must be above 10 [1].…”

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confidence: 99%

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Statistical Evaluation of Scrubbing and Screening Optimization in Bauxite Processing

Gonçalves¹,

Mendes²,

Bergerman³

et al. 2017

TMM

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In the Miraí processing plant (Votorantim Metais), bauxite is processed with an average feed of 1,000 t/h in a circuit with crushing, scrubbing and screening stages. Two plant unit operations needed optimization: (1) The scrubber promoted not only the attrition and disaggregation of bauxite, but was also its griding; (2) The screened fine products had material with significant amounts of available aluminium (AA) and low reactive silica (RS) contents. In this work, modifications were introduced in the scrubber and screening circuit in order to improve the plant performance. A pulp lifter was installed in the scrubber. In addition, the apertures of the primary and secondary screens were changed. Statistical univariate analysis was used to support the process gain due to the introduced modifications. According to the variance analysis (ANOVA), there was no loss of product quality since the resulting AA, RS and iron (Fe) contents agree with the metallurgical specification and the previous results before the optimization work. The mass recovery increased by 3.88%, which means a gain of 43 t/h for the operation. Keywords: Bauxite; Scrubbing; Screening; Statistical analysis. AVALIAÇÃO ESTATÍSTICA DA OTIMIZAÇÃO DAS OPERAÇÕES DE ATRIÇÃO E PENEIRAMENTO NO BENEFICIAMENTO DE BAUXITA ResumoNa planta de beneficiamento de Miraí (Votorantim Metais), bauxita é processada com uma alimentação média de 1.000 t/h em um circuito composto por britagem, desagregação em um scrubber e peneiramento. Duas operações da planta necessitavam otimização: (1) O scrubber promovia não só a atrição da bauxita como também sua fragmentação; (2) O peneiramento descartava material com quantidade significativa de alumínio aproveitável (AA) e baixo teor de sílica reativa (SR). Neste trabalho mudanças foram introduzidas no scrubber e no circuito de peneiramento para aprimorar o desempenho da planta. Um sistema de descarregamento foi instalado no scrubber. Além disso, a abertura das peneiras primárias e secundárias foi modificada. Análises estatísticas univariadas foram usadas para confirmar o ganho do processo devido às modificações introduzidas. De acordo com a análise de variância (ANOVA), a qualidade do produto não piorou, pois os teores de AA, SR e ferro (Fe) estão de acordo com a especificação metalúrgica. A recuperação mássica aumentou em 3,88%, o que significa um ganho de 43 t/h para a operação.

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Separation of silica from bauxite via froth flotation

Cited by 43 publications

References 4 publications

Mineralogical and Physical–Chemical Characterization of a Bauxite Ore from Lages, Santa Catarina, Brazil, for Refractory Production

Mineralogical and Physical–Chemical Characterization of a Bauxite Ore from Lages, Santa Catarina, Brazil, for Refractory Production

Zur Aufbereitung von Bauxiten unter besonderer Berücksichtung der Rohgut-Charakterisierung

Statistical Evaluation of Scrubbing and Screening Optimization in Bauxite Processing

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