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flotation of high silica bauxite

flotation of high silica bauxite

Investigation of Flotation Behaviors of Refractory High ...

High content of silica results in high soda consumption, which limits the use of high-silica bauxite in the production of Bayer alumina. In this work,the main flotation parameters of high silica bauxite (A/S 5.0) including particle size, pulp pH, collector dosage and dispersant dosage were studied.

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Separation of silica from bauxite via froth flotation ...

2009-3-1 · The flotation recovery of high-purity gibbsite concentrates from a Brazilian bauxite ore V.I. Lakshmanan (Ed.) , Advanced Materials Applications of Mineral and Metallurgical Processing Principles , Society for Mining Metallurgical and Exploration , Littleton ( 1990 ) , pp. 77 - 85

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Separation of silica from bauxite via froth flotation ...

Abstract. This paper reports an innovative development: concentrating gibbsite via reverse froth flotation in order to obtain a metallurgical-grade bauxite concentrate. Tailings from an industrial plant have undergone attrition scrubbing and desliming; the quartz silica contained in the tailings has undergone flotation.

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Separation of silica from bauxite via froth flotation

This study is aimed at decrease silica content and increase alumina content in bauxite so its qualified as feed of Bayer Process. The experiments were carried out in

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New insights into flotation mechanism of diasporic bauxite ...

2021-12-28 · 1. Introduction. Bauxite is the main source of aluminum metal, and one of its typical types is diasporic bauxite, of which the valuable mineral is diaspore and the main associated gangues are aluminosilicate minerals such as kaolinite, illite, and pyrophyllite .Diasporic bauxite is often of poor quality (the content ratio of alumina and silica is too low) and needs to be

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The processing of high silica bauxites — Review of ...

2009-8-1 · 1. Introduction1.1.. ScopeThis document will critically review existing and potential processes for the processing of high silica bauxites. High silica bauxites are usually considered to be those with reactive silica contents in excess of ∼. 8% by weight of the bauxite (reactive silica is defined later in this paper).. This review is limited to bauxites as feedstocks for the processes.

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Bauxite Beneficiation & Flotation | Silica & Iron ...

Because the desired product is a high purity Al2O3, the remaining oxides in the bauxite (Fe2O3, SiO2, TiO2, Organic material) are separated from the Al2O3 and rejected as alumina refinery resides (ARR) or red mud. In general, the lower quality the bauxite (ie lower Al2O3 content) the more red mud is generated per ton of alumina product.

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(PDF) Reduction of Reactive Silica from Bauxite

World reserves of bauxite include vast quantities of ore which at present are sub-economic due to high levels of reactive silica that cause expensive loss of

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The Processing of High Silica Bauxites — Review of ...

Low-grade high-silica bauxite has a relatively low alumina/silica (A/S) ratio, so it must be desilicated prior to be used in the Bayer process digestion system [3,

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Beneficiation of High Silica Bauxite Ores of India an ...

The more is the silica, higher is the soda consumption which increases the cost of alumina production. Physical beneficiation techniques are employed to reduce the reactive silica content of bauxite. Based on several investigations it has been made possible to remove ~30% of silica with 92% recovery depending on the characteristics of the ore.

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Separation of silica from bauxite via froth flotation

This study is aimed at decrease silica content and increase alumina content in bauxite so its qualified as feed of Bayer Process. The experiments were carried out in

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THE FLOTATION OF MARGINAL GIBBSITIC BAUXITE

2012-8-17 · research including a high grade marginal ore (BNC) and a low grade marginal ore (BN). ... the predominant silica gangue mineral. Bench flotation tests using customized collectors ... 4.12 Effect of desliming on grade for direct flotation with BN bauxite ore, 80% passing

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Recent Developments in the Beneficiation of Chinese Bauxite

An important result of recent bauxite flotation research was the opening in 2002 of the first bauxite mineral ... Beneficiation of High Silica Bauxite Ores of India an Innovative Approach.

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Hydrochloric acid leaching for upgrading flotation ...

Deposits of bauxite ores near aluminum smelters often possess an excessively high percentage of silica. Development of such high-silica ores would be beneficial to alumina producers.

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PAPER OPEN ACCESS A study of bauxite tailing quality ...

2020-5-18 · diasporic bauxite with Al to Si recovery ratio of 10 and alumina recovery of 86%. Recent research by the authors reported that reverse flotation can be applied to separate silica from bauxite ores from Tayan. The ratio Al to Si can be increased from 7 up to 14, by using dodecylamine as the collector [7].

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The Influence of Backwater Al3+ on Diaspore Bauxite

The effect of Al3+ in backwater on the flotation of diaspore bauxite was investigated by micro-flotation tests and the underlying mechanisms were investigated by inductively coupled plasma (ICP) measurement, zeta potential measurements, solution chemistry analyses, and synchrotron near edge X-ray absorption fine structure (NEXAFS) analyses. The ICP measurement results

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Removal of silicates from gibbsite-bauxite ore by using ...

2021-12-11 · has a high content of alumina followed by high silica content. This type of bauxite is not optimally used because it cannot be used as feed for Bayer process. In order to optimize this high-content of silica bauxite, a beneficiation studies was conducted using one of the concentration methods, called flotation.

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Concentration of bauxite fines via froth flotation

The flotation recovery of high-purity gibbsite concentrates from a Brazilian bauxite ore. In: LAKSHMANAN, V.I. Advanced materials applications of mineral and metallurgical processing principles . Littleton, Society for Mining, Metallurgy and Exploration Inc., 1990. p. 77-85.

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Desilication and Recycling of Alkali-Silicate Solution for ...

2019-12-17 · Various methods have been applied for bauxite desilication, including flotation desilication,3 biologic desilication,4,5 and desilication by roasting.6 Among these methods, roasting-alkali leaching desilication at atmospheric pressure1,2,7,8, – 9 is the most effective and widely used, because of its advantages of high silica removal ratio and ...

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Study on the Flotation Desilication of Low Grade Bauxite ...

Study on the Flotation Desilication of Low Grade Bauxite Ore with High Content of PyrophylliteCN 张倩 中南大学

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Removal of silicates from gibbsite-bauxite ore by using ...

2021-11-23 · Alumina content and silica content as results of flotation were analyzed by XRF. The results of XRF of flotation products show that increasing of alumina content and decreasing of silica content. The optimum pH range of bauxite flotation using DDA and AERO 3000C as collectors can be achieved at pH 4 – 10.

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THE FLOTATION OF MARGINAL GIBBSITIC BAUXITE

2012-8-17 · research including a high grade marginal ore (BNC) and a low grade marginal ore (BN). ... the predominant silica gangue mineral. Bench flotation tests using customized collectors ... 4.12 Effect of desliming on grade for direct flotation with BN bauxite ore, 80% passing

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Removal of silicates from gibbsite-bauxite ore by using ...

2021-12-11 · has a high content of alumina followed by high silica content. This type of bauxite is not optimally used because it cannot be used as feed for Bayer process. In order to optimize this high-content of silica bauxite, a beneficiation studies was conducted using one of the concentration methods, called flotation.

Read More
PAPER OPEN ACCESS A study of bauxite tailing quality ...

2020-5-18 · diasporic bauxite with Al to Si recovery ratio of 10 and alumina recovery of 86%. Recent research by the authors reported that reverse flotation can be applied to separate silica from bauxite ores from Tayan. The ratio Al to Si can be increased from 7 up to 14, by using dodecylamine as the collector [7].

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Flotation Desulfurization of High-sulfui Bauxite with Butyl ...

2008-10-22 · Abstract. Abstract: The desulfurization of high-sulfur diasporic bauxite from China with flotation process and butyl xanthate as collector was studied, and the effects of flotation time, pulp density, pH value and particle size of ores on the desulfurization rate were examined. The results indicated that the sulfur in bauxite was successfully ...

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The Influence of Backwater Al3+ on Diaspore Bauxite

The effect of Al3+ in backwater on the flotation of diaspore bauxite was investigated by micro-flotation tests and the underlying mechanisms were investigated by inductively coupled plasma (ICP) measurement, zeta potential measurements, solution chemistry analyses, and synchrotron near edge X-ray absorption fine structure (NEXAFS) analyses. The ICP measurement results

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Flotation mechanism of octylic hydroxamic acid on

2013-4-19 · Bauxite resources are widely spread in the earth. However, the effective utilization of this mineral is still under infant. The conventional collector for diaspore mineral is oleic acid. It has three main drawbacks which are highly insoluble, large dosages in bauxite flotation, and low selectivity, which hinder its application in industry. In this research, octylic hydroxamic acid was ...

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Beneficiation of bauxite

2011-8-11 · The silica present in the bauxite tends to be concen-trated in the finer grained fractions, and this charac-teristic makes bauxite amenable to beneficiation by screening techniques. Pearson' has reported that in a bauxite of average composition of 1.58% silica, the minus 100 mesh fraction analysed a silica content as high as 10.30%.

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Concentration of bauxite fines via froth flotation

The flotation recovery of high-purity gibbsite concentrates from a Brazilian bauxite ore. In: LAKSHMANAN, V.I. Advanced materials applications of mineral and metallurgical processing principles . Littleton, Society for Mining, Metallurgy and Exploration Inc., 1990. p. 77-85.

Read More
Study on the Flotation Desilication of Low Grade Bauxite ...

Study on the Flotation Desilication of Low Grade Bauxite Ore with High Content of PyrophylliteCN 张倩 中南大学

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