flotation of bauxite

Kaolinite removal from bauxite by flotation - SciELO

The preparation of bauxite caused an increase in the alumina/silica mass ratio from 7.30 to 11.05. Subsequently, laboratory scale flotation tests were conducted to verify the reproducibility of the results indicated in the microflotation stage. Laboratory scale flotation tests were done in a Denver machine using a 900 mL cell.

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A novel collector RL for flotation of bauxite | SpringerLink

The flotation properties of single minerals such as diaspore, kaolinite and pyrophllite in bauxites were investigated using RL as collector. The effects of regulators and unavoidable ions on flotation were studied. Based on the results of single minerals flotation, the separation experiments of mixed minerals and bauxite ore were carried out. The results of closed circuit test on the ore show ...

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Bacterial and Archaeal Communities in Recycling Effluents ...

18 the regular production of bauxite via flotation and the sustainable development of the aluminum 19 industry in China. To find a practical direction for biotreatment, the bacterial and archaeal 20 communities in recycling effluents containing concentrate and tailings from bauxite flotation

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Effect of quaternary ammonium salts on flotation behavior ...

The character of bauxite and the technology of flotation desilicate in China[J]. Metallic Ore Dressing Abroad, 2000(5): 11–16. [8] FENG Qi-ming, LIU Guang-yi, LU Yi-ping. The 90's research and outlook of bauxite on impurity removing by mineral processing[J]. Light Metals, 1998(4): 9–13. (in …

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-The Strengthening …

Abstract:To study the effects of pH, slurry concentration, the type and dosage of flocculants on the sedimentation property of tailings, single factor and orthogonal static sedimentation experiments on flotation tailings of bauxite were conducted.The results showed that the surface static potential of particles is the key effect factor for the sedimentation rate of tailings, good sedimentation ...

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THE FLOTATION OF MARGINAL GIBBSITIC BAUXITE ORES …

ABSTRACT Bauxite ore is the primary mineral resource for the production of aluminum metal and includes gibbsite [Al(OH) 3], diaspore [α-AlO(OH)] and boehmite [γ-AlO(OH)]. Gangue minerals generally include iron oxides (Hematite [Fe 2O 3], Goethite [FeO(OH)]), silicates (quartz [SiO 2]), kaolinite [Al 2Si 2O 5(OH) 4] and others such as rutile/anatase [TiO 2].

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CN1775370A - Bauxite combined flotation desilicification ...

The present invention relates to a bauxite combined floatation desilicification method. It is characterized by that said method adopts the following measures: designing main process of bauxite floatation separation and desilicification into reverse floatation to obtain bauxite tank bottom headings, combining the previously deslimed overflowed product produced in reverse floatation main process ...

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2007-The role of cationic polyacrylamide in the reverse ...

AbstractThe reverse flotation separation of kaolinite and diaspore has been achieved by using the collector dodecylamine (DDA) and depressant cationic polyacrylamide (CPAM) at pH 5.5–8.5. The flotation results have been explained by adsorption measurement, solution chemistry and density functional theory (DFT) calculations. At pH 5.5–8.5, the main components at the diaspore/water …

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Flotation Desulfurization of Acidified High-Sulfur Bauxite ...

12%Abstract. The desulfurization of high-sulfur bauxite via flotation is more difficult than conventional sulphide, since the finely disseminated sulphide in the high-sulfur bauxite can lead to excessive particle entrainment, increase of froth, and low separation efficiency.

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Advances in Beneficiation of Low-Grade Bauxite | SpringerLink

Abstract. Bauxite is the major alumina (Al 2 O 3) bearing ore used in the aluminum manufacturing industries.The bauxite containing less than 50% Al 2 O 3 is called low-grade bauxite ore which is commonly used for the alumina-based abrasives and refractories productions. The alumina-silica and alumina-ferrite complexes are the foremost impurities present in the low-grade bauxite.

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A review of pretreatment of diasporic bauxite ores by ...

In the reverse flotation of bauxite ore, dispersants are used to increase the opportunity of interactions between fine particles and reagents (depressants and collectors) in the pulp. Sodium carbonate has been widely used as a dispersant for kaolinite and has proven to be effective in reverse flotation (Marino, 2012, Liu-yin et al., 2010).

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Froth Flotation Process - Detailed Explanation With ...

Froth flotation is an important concentration process that can be used to selectively separate hydrophobic materials from hydrophilic waste gangue. In a more simple context, froth flotation is one of the most popular operational processes for mineral beneficiation. In ore/mineral beneficiation, froth flotation is a method by which commercially ...

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Study on improving the ratio of aluminum to silicon in ...

The methods of flotation include positive flotation and reverse flotation. Flotation generally use fatty sulfonates or bauxite flotation collector, the reverse flotation using an amine collector to, sodium hexametaphosphate, sodium silicate, soda and other tannin as a regulator. As early as the 1930s and 1940s, the United States used the ...

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Effect of hydroxamic acid polymers on reverse flotation of ...

Effect of hydroxamic acid starch on reverse flotation desilicate from diasporic bauxite [J]. Trans Nonferrous Met Soc China, 2002, 12(5):974–978. Google Scholar Download references. Author information. Affiliations. School of Chemistry and Chemical Engineering, Central South University, 410083, Changsha, China ...

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Ionic effect of NaCl and KCl on the flotation of diaspore ...

The major type of bauxite in China is low-grade diasporic bauxite, which is mainly composed of diaspore and kaolinite. Separation of silicate minerals by flotation technology can meet the requirements of Bayer process, but Na, K and Cl deriving from mineral dissolution and entrainment in flotation water will inevitably mix in the flotation slurry, which will affect the flotation of bauxite.

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Theory And Technology Of Selective Dissociation-floatation ...

Theory And Technology Of Selective Dissociation-floatation Process On Accumulative Bauxite Desilicate: Posted on: Degree:Doctor Type:Dissertation Country:China Candidate:C H Deng Full Text:PDF GTID:11073 Subject:Mineral processing engineering Abstract/Summary:

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The response of diasporic-bauxite flotation to particle ...

This paper was to investigate the effect of particle size on diasporic-bauxite flotation. For this purpose, concentrate products of various size fractions were collected at different flotation times and forwarded to the testing of Al 2 O 3 and SiO 2 contents. Six flotation kinetic models were applied in the fitting of the experimental data in terms of Al 2 O 3 and SiO 2 recovery.

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Extraction Process of Aluminium from Bauxite Ore

Metallurgical ContentAlumina Extraction ProblemAluminum Extraction FlowsheetAluminum FactsFrom Bauxite to AluminiumThe Bayer ProcessHall or Heroult Process Aluminum is the most abundant metal in the earth's crust and is a constituent of many minerals. However, the material which is highest in aluminum and most free from objectionable impurities is bauxite …

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Concentration of bauxite fines via froth flotation

The tailings still contain bauxite, which can be separated by reverse froth flotation (flotation of the quartz and depression of the bauxite), using starch as a depressant and amine as a promoter; the pH must be around 10.0.

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Flotation of Low-Grade Bauxite Using Modified Humics as ...

12%Flotation of low-grade bauxite is an effective way to improve the grade. Flotation experiments were carried out by using modified humics as depressant in this paper. The effects of pulp pH, collector dosage and depressant dosage were examined. Under the optimal flotation conditions with sodium oleate dosage of 2200 g/t, modified humics dosage ...

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Bauxite Beneficiation & Flotation | Silica & Iron ...

However, a high-grade bauxite contains up to 60% Al2O3, and many operating bauxite deposits are well below this, occasionally as low as 30-40% Al2O3. 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 ...

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Flocculation and Sedimentation of Bauxite Flotation Tailings

Flocculation and sedimentation of fine bauxite from flotation tailing pulp were studied using different flocculants to investigate the possibility of its application.

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Characterization and flotation of low-grade boehmitic ...

Bauxite is the main raw material in primary aluminum production and its reactive silica content and mass ratio of Al 2 O 3 to SiO 2 (A/S) has a critical role in the economic viability of Bayer process. As a major source of the reactive silica, clay impurities should be removed from the ore as much as possible by a beneficiation method such as froth flotation before the Bayer processing.

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Applications of Xâ€"ray computed tomography in particulate ...

an overall gibbsite recovery from the bauxite flotation feed of about 90?. INTRODUCTION Aluminum is the third most abundant element in the earth's crust. In nature it occurs only in combination with other elements and is part of the crystal structure of many rock-forming minerals. ...

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5、,, Flotation of a low-grade bauxite ore using an organosilicon cationic collector, MINERALS & METALLURGICAL PROCESSING, 2015 ( 11 ): 209-214. 6、 、,,, 2018 ( 4 ): 20-24

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INVESTIGATION AND OPTIMIZATION OF USE OF ANIONIC ...

Key words: bauxite, collector, direct flotation Introduction Bauxite is the main raw material for the alumina industry. Almost 90% of alumina all over the world is produced from raw bauxite ores (Wang, 2002). China has a large reserve of bauxite resources mainly distributed in …

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Separation of silica from bauxite via froth flotation ...

Bauxite flotation practice Worldwide, the industrial practice for bauxite consists in feeding the ROM ore directly to the alumina production plant. Shaffer (1985), in his contribution to SME Mineral Processing Handbook chapter on alumina, literally writes that "the intrincate milling and mineral dressing techniques common in the base metal ...

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A novel collector RL for flotation of bauxite

In this paper, a column flotation device - cyclonic-static micro-bubble flotation column is used, to carry out the test of industrial shunt at the production site of bauxite flotation, with its ...

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CN100354045C - Bauxite crude-fine grading flotation ...

The present invention relates to a bauxite crude-fine grading flotation desilicification method. In the present invention, ground raw ore slurry is graded into a coarse sand part and a fine sand part according to certain granularity; fine clay is treated by direct flotation technology, and the coarse sand is treated by reverse flotation technology; consequently, the optimization of the ...

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(PDF) Beneficiation of Bauxite – Upgrading of Recoverable ...

The tailings of the beneficiation plant described in chapter 4.3 (Itamarita de Minas) still contain bauxite, which can be separated by reverse froth flotation (flotation of the quartz and depression of the bauxite), using starch as a depressant and amine as a promoter at a pH of approx. 10.

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Flotation performance of a novel Gemini collector for ...

How to sustainably produce bauxite by effective reverse froth flotation of kaolinite at low temperature is an urgent problem to be solved in the field of mineral processing. In this work, a novel amino-based Gemini surfactant butadiyl-1, 4-bis (dimethyl dodecylammonium bromide) (BBDB) was prepared and first utilized as a novel collector for kaolinite flotation.

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A review of the surface features and properties ...

Diasporic bauxite represents one of the major aluminum resources. Its upgrading for further processing involves a separation of diaspore (the valuable mineral) from aluminosilicates (the gangue minerals) such as kaolinite, illite, and pyrophyllite. Flotation is one of the most effective ways to realize the upgrading. Since flotation is a physicochemical process based on the difference in the ...

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Froth Flotation 101 - YouTube

https:// A short Froth Flotation Course with Technique, Method & Procedure by a true expert.

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Application of Intensifying Secondary Concentration ...

In order to resolve the problem of fine particle flotation in the reverse flotation of bauxite. a new method of intensifying secondary concentration technology was firstly advanced, and author applied it to ore, achieved eximious experimentation index. The reverse flotation tests of intensifying secondary concentration aiming at bauxite from Guizhou province were studied.

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

flotation method to reduce its silica content in the ore. Therefore, this study is aimed to utilize reverse flotation method to recover alumina content from washed bauxite tailing. The reverse flotation experiments were carried out at pH of 6 and 8; while the particle sizes were varied at -

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Pioneering Studies on the Flotation of Corundum From a ...

Two flotation schemes were employed to produce high-grade corundum concentrates. The concentrates resulting from each scheme exceeded the national stockpile specifications for calcined bauxite. Flotation of the corundum using petroleum sulfonate in an acid circuit resulted in …

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