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Flotation Decarbonization and Desulfurization of a High-Sulfur Bauxite

A high sulfur content is one of the challenges in the processing of refractory bauxites in China. The high carbon content of bauxite makes it more difficult to deal with. Desulfurization and decarbonization are the critical issues in the efficient exploitation of high-sulfur bauxite resources. An experimental study on the removal of sulfur and …

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Research on the Desulfurization of High Sulfur Bauxite

With fast development of alumina industry, and dramatic increasing of bauxite consumption, high-sulfur bauxite has become a potential exploitable resource [1, 2].In the Bayer process, the presence of sulfide can result in alkali loss, equipment corrosion, impurities dissolution and blocking pipes [1, 3].Therefore, desulfurization of …

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Effect of Ultrasonic Pre-Treatment on the Reverse Flotation …

Cationic reverse flotation of kaolinite from bauxite is an alternative to adequate high silica bauxites to the specifications of the Bayer process. However, the presence of clay minerals influences the slurries rheology decreasing the …

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Bauxite is concentrated by:A) Chemical methodB) …

Bauxite is concentrated by:A) Chemical methodB) RoastingC) Magnetic separationD) Froth flotation process. Ans: Hint: We know that ores of different metals are concentrated by different methods based on the difference between …

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Separation of silica from bauxite via froth flotation

This flotation was carried out in two steps: the first step was the flotation of gibbsite/kaolinite from quartz at pH 2, using alkyl sulfates as collectors; the second step …

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New insights into flotation mechanism of diasporic bauxite …

2.3. Construction of LF drainage rate model. Fredriksson et al. [25] found that the adsorption process of flotation collector on mineral surface is time-dependent, and the process conforms to second-order kinetic model. Moreover, the adsorption rate is …

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Leaching Behaviors of Lithium-Rich Bauxite Flotation

Lithium-rich bauxite flotation tailings are a potential lithium resource. This study proposed a green and effective lithium extraction process employing sodium …

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Flotation Decarbonization and Desulfurization of a …

Table 5 shows that the desulfurization tailing (bauxite concentrate) had a sulfur content of 0.38%, a carbon content of 0.27% and an alumina content of 71.85%. In contrast, a total desulfurization rate of …

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Interactions between bubble and particles of key minerals …

The actual flotation is a dynamic process in which the conditions are much more complicated than the static factors examined in this article as the fact that they should also include parameters such as fluid dynamics [18], [49]. But in any case, it does show some very valuable regularities for diasporic bauxite flotation in theory. 5 ...

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The response of diasporic-bauxite flotation to particle size …

1. Introduction. In China, the main type of bauxite resource is diasporic-bauxite in which the principal valuable mineral is diaspore [1].This type of bauxite contains large amounts of clay minerals such as kaolinite, illite, and pyrophyllite [2], which results in high Al 2 O 3 content and SiO 2 content, but a low mass ratio of Al 2 O 3 to SiO 2 (A/S) …

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A novel collector for high-sulfur bauxite flotation …

ABSTRACT. Effective desulfurization of high-sulfur bauxite is one of the major problems in the alumina production industry. To overcome this, a novel …

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Ionic Effect of NaCl and KCl on the Flotation of Diaspore and Kaolinite

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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A review of the surface features and properties, surfactant …

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 …

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Research progress on desulfurization technology of high-sulfur bauxite

Their intercalation with diasporic bauxite is complex and the removal of sulfur impurities in high-sulfur bauxite is, therefore, a great challenge. 2.2 Hazards of sulfur in bauxite During the dissolution process of the Bayer process, sulfur exists in bauxite in the form of 2 3SO âˆ', 2 4SO âˆ', 2S âˆ', 2 2 3S O âˆ', etc ...

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Flotation of Low-Grade Bauxite Using Modified Humics as …

Therefore, flotation desilication can economically improve the grade of bauxite ore to reach the standard of Bayer process . As it is concern to flotation, more and more attentions have been being paid onto flotation reagent which can make remarkable effect on the process of flotation [ 5 ].

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Synchronous Desulfurization and Desilication of Low …

and High-Sulfur Bauxite by a Flotation Process Wencui Chai, Guihong Han, Yanfang Huang, Yijun Cao, and Jiongtian Liu Abstract The existence of sulfur and silica in bauxite influence the product quality of Bayer alumina. The synchronous desulfurization and desilication of low-grade and high-sulfur bauxite through reverse flotation processes

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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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Bauxite Flotation-In The Process Of Bauxite Flotation And …

Find the best quality bauxite flotation-in the process of bauxite flotation and separation of silicon here at simo-chem. We are a professional manufacturer and supplier for industrial surfactants and it's chemical synthesis with over 20 years experience. Offering samples freely, we warmly welcome to buy our products made in China and enjoy our …

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Integrated prediction model of bauxite concentrate grade …

The diasporic-bauxite flotation process is too long and complicated, with froth overflowing and pulp underflowing in multiple phases, resulting in couplings among different cells. Besides, there are large variations in concentrate grade and difficulties in online measurement, and grade prediction only by rougher features has the …

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Characterization and flotation of low-grade boehmitic bauxite …

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 …

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Aluminum Mineral Processing and Metallurgy: …

All of these conventional techniques cannot recover iron and aluminum from iron-rich bauxite effectively. The reverse flotation process of iron-rich bauxite cannot achieve effective separation of Al 2 O 3 and …

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Study on potential microbial community to the waste water …

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 ...

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flotation of silica from bauxite ore

flotation of high silica bauxite, process crusher, mining …. High silica bauxite desilication beneficiation process, … used in the beneficiation of bauxite ore: cyanidation, flotation, amalgamation, … » More detailed flotation of high silica bauxite – ore mineral crushers. alumina from high silica bauxite – us patent 4661328 description. …

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Positive flotation beneficiation process for bauxite

For low-grade bauxite raw ore (aluminum silicon ratio 3-4), the original selective grinding agglomeration flotation method is difficult to meet the requirements, and flotation desilication has gradually become a research focus; At present, flot

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Synchronous Desulfurization and Desilication of Low …

The existence of sulfur and silica in bauxite influence the product quality of Bayer alumina . The synchronous desulfurization and desilication of low-grade and high-sulfur bauxite through reverse flotation processes were studied using modified starch as depressants in this work.

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A novel collector for high-sulfur bauxite flotation …

ABSTRACT. Effective desulfurization of high-sulfur bauxite is one of the major problems in the alumina production industry. To overcome this, a novel nanoparticle collector (NC) to improve the desulfurization performance during flotation process was synthesized via emulsion polymerization method, whereby lignin (natural polymer) was …

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[PDF] Metallurgy and materials Metalurgia e

In the bauxite flotation process, concentrate grade and tailings grade are key production indicators; however, they are difficult to measure online. It is also difficult to develop an effective mathematical model for the process because of the complex non-linear and uncertain relationship among the feed parameters (feed grade, pulp density, slurry …

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Effect and mechanism of quaternary ammonium salt ionic …

As an important collector of sulfide ore, xanthate is also widely used in the desulfurization flotation of high-sulfur bauxite (Ma et al., 2017). Amine and xanthate collectors can lead to the environmental pollution, and the dosage had to be added in stages during the flotation process, which is complicated in operation.