bauxite flotation test
Study on quantitative structure–activity relationship of quaternary
Closed-circuit flotation tests showed that reverse flotation de-silicating can be achieved by a new reagent scheme (DTAL, SFL and MIBC) to obtain a bauxite concentrate (A/S > 10, Al2O3 recovery ...
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Solution chemistry of flotation separation of diasporic bauxite
The technological schemes of direct or reverse flotation separation of aluminum silicate minerals from bauxite were suggested. The fundamentals involved the technologies were studied. The relationship of collectors, dispersant and pH can be determined by solution chemical calculation in the direct flotation of bauxite by anionic collectors.
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Separation of silica from bauxite via froth flotation
By reverse flotation of the ore, a high-grade bauxite concentrate with A/S ratio 8.54 was obtained, however the Al 2 O 3 recovery remained low at 42.87%. Although the A/S rate achieved by the flotation was adequate for the Bayer process, Al 2 O 3 recovery was considered to be low for flotation process. It was deduced that the …
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Treatment technique for wastewater from bauxite flotation …
During bauxite flotation, flotation indexes decrease with increasing water circulation time, resulting in the discharge of bauxite flotation wastewater as well as a waste of resources and great environmental safety risks. To determine how to return the wastewater back to the flotation process, this study aimed to identify the main …
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Reverse flotation for removal of silicates from diasporic-bauxite
The diasporic-bauxite ores used in the flotation tests were supplied from Zhengzhou Henan China, and crushed to 0–3 mm by a jaw crusher and double-roller. ... The open-circuit test results are shown in Fig. 2, Fig. 3, Fig. 4 respectively. Download : Download high-res image (3KB) Download : Download full-size image;
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Research progress on desulfurization technology of high-sulfur bauxite
Results showed that when roasting at 650 °C for 120 s, the desulfurization efficiency was up to 76.98%, while the residual sulfur in the roasted ore was found to be 0.07%. HU et al [24] roasted high-sulfur bauxite ore at 600 °C for 60 min, and the dissolution test was performed at 240 °C and roasted for 60 min.
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Flotation enhancement of low-grade bauxite using oxalic acid …
Then, a flotation test was carried out in a laboratory flotation machine (XFD-1.5, China). The pulp pH was adjusted to 9.0, and then 240 g/t of auxiliary collector Phe and 800 g/t of NaOL collector were added successively and conditioned for 2 min respectively. ... For the untreated bauxite, the flotation recovery of Al 2 O 3 and SiO 2 in the ...
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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 …
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(PDF) Kaolinite removal from bauxite by flotation:
The open-circuit flotation results also show that a bauxite concentrate with m(Al2O3)/m(SiO2) over 9.3 and Al2O3 recovery over 76% can be obtained from diasporic-bauxite ore.
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Ionic Effect of NaCl and KCl on the Flotation of Diaspore
Abstract. 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 …
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(PDF) Effect and mechanism on the flotation
The results of flotation test provide optimum reverse flotation conditions of high-sulfur bauxite. Finally, the most suitable regime of agent in the roughing stage is: grinding fine ne ss of -0 ...
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Treatment technique for wastewater from bauxite flotation …
To determine how to return the wastewater back to the flotation process, this study aimed to identify the main components affecting the flotation indexes of flotation …
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Concentration of Brazilian Refractory Bauxite by Direct Flotation
The milling curve of the sample was determined at 3 different times (6, 8 and 10 minutes) in rod mill (diameter = 20.5 cm and height = 25.3) at 64 rpm. 2.4. Flotation tests Shortly after grinding, bauxite direct flotation tests were conducted (flotation cell: CFB - …
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Leaching Behaviors of Lithium-Rich Bauxite Flotation
The lithium-rich bauxite flotation tailings are obtained from the Sanmenxia bauxite in Henan Province. The chemical composition of the lithium-rich bauxite flotation tailing samples is presented in Table 1. As seen in Table 1, the Li 2 O content was 0.59%, and the main impurities were Al 2 O 3 and SiO 2. Sodium bicarbonate (AR purity) was ...
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Fine Bauxite Recovery Using a Plate-Packed Flotation …
Flotation experiments showed that packing-plates in the collection zone of a column can improve bauxite flotation performance and increase the smaller bauxite …
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Flotation Desulfurization of Acidified High-Sulfur Bauxite: …
The desulfurization of high-sulfur bauxite via flotation is more difficult than conventional sulphide, since the finely disseminated sulphide in the high-sulfur bauxite …
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Effects of Fine Minerals on Pulp Rheology and the Flotation …
For high-sulfur bauxite, flotation is the most economical and efficient desulfurization method at present . In the mineral processing industry, ... and fine minerals were used to measure the pulp rheology and to test flotation. Pulp rheology measurement, sedimentation tests, and flotation tests were used to study the effects of fine minerals on ...
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Flotation of Low-Grade Bauxite Using Modified Humics as …
Abstract. The low-grade bauxite, which is abundant in China, cannot be directly used in Bayer process. 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 …
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Concentration of bauxite fines via froth flotation
Keywords: Bauxite preparation, froth flotation, reverse froth flotation. REM: R. Esc. Minas, Ouro Preto, 62(3): 271-276, jul. set. 2009 271 Concentration of bauxite fines via froth flotation 1. ... Exploratory tests tried reverse rougher-cleaner-scavenger test was cationic flotation of quartz using For systematic testing, results carried out. ...
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A novel collector RL for flotation of bauxite | Journal of …
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 …
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Separation of silica from bauxite via froth flotation
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 …
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Experimental and molecular dynamics simulation study on …
The batch flotation test was conducted in an XFG flotation cell. For each test, 600 g bauxite sample was mixed with 600 mL water and ground to 95% passing 200 mesh standard sieve. The flotation pH was regulated by Na 2 CO 3 and fixed at 9.5. Then hexametaphosphate, NaOl and BDA was added in order. The flotation process included …
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Flotation Desulfurization of Acidified High-Sulfur Bauxite: …
The flotation desulfurization tests were carried out in a single flotation cell of 1.5 L. In each test run, bauxite with a 30% pulp density was ground to 78 ± 2% < 0.075 mm, and loaded into the flotation tank. The pulp pH was adjusted to the target pH value, and then the regulator, activator, collector, and frother were added successively.
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Fine Bauxite Recovery Using a Plate-Packed Flotation Column
Zhang et al. [13] utilized a plate-packed flotation column (PFC) for fine bauxite, and the Al 2 O 3 recovery and grade increased by 2.11% and 1.85%, respectively, compared to the result obtained ...
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Flotation of low-grade bauxite using organosilicon cationic …
During bauxite flotation, flotation indexes decrease with increasing water circulation time, resulting in the discharge of bauxite flotation wastewater as well as a waste of resources and great environmental safety risks. ... A concentrate with Al2O3 recovery of 85.56% was obtained by a closed-circuit flotation test, with the alumina-to …
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Treatment of backwater in bauxite flotation plant and …
Bauxite flotation wastewater is generally weakly alkaline (the pH is approximately 9.0) and mainly contains suspended solids, soluble solids, ions, reagent residues and other pollutants (Huo et al., 2019). ... SR-μCT test results also confirmed that bauxite residue following PG treatment acquired larger aggregates and larger pore …
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A review of pretreatment of diasporic bauxite ores by flotation …
The major method of bauxite beneficiation is the Bayer process, which is leaching at 100 °C to 250 °C by a caustic soda solution (sodium hydroxide) followed by solid-liquid separation, cooling, precipitation, filtration and calcination, with alumina as the final product. The process dissolves the majority of the alumina-bearing minerals and ...
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Treatment of backwater in bauxite flotation plant and optimization by
Flotation tests were carried out using the backwater after treatment. 2.2.2 Flotation test Flotation tests [11] were performed in a flotation cell with a flotation volume of 1.5 L and were carried out under the industrial conditions of grinding fineness of 92.69% <0.074 mm, pulp density of 31%, pH value of 9.3, and temperature of 25 °C.
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The Impact of Backwater Iron Ions on Bauxite Flotation
The industrial test of Bayer-mineral processing method was successfully completed in Xiaoguan Henan, China in 1999, and since then, the Bayer-mineral processing method was widely used in alumina industry. ... Iron ions was inevitably existed in backwater and would have important influence on diaspore bauxite flotation, it activated the ...
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Flotation enhancement of low-grade bauxite using oxalic …
Organic acid pretreatment of low-grade diasporic-bauxite was conducted, and the effects of oxalic acid on bauxite flotation were investigated in this work. The oxalic …
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