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Bauxite Flotation Diaspore

Flotation techniques for separation of diaspore from ...

2010-3-1  Flotation techniques for separation of diaspore from bauxite using Gemini collector and starch depressant XIA Liu-yin( 9?), ZHONG Hong(Js c), LIU Guang-yi( S ) School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China Received 19 February 2009; accepted 13 July 2009 Abstract: The floatability of diaspore and three kinds of silicate minerals, including ...

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Flotation separation of diaspore from aluminosilicates ...

2017-11-10  A systematic study of diasporic bauxite flotation using commercial oleic acids with different iodine values as collector was conducted in this paper. Bench scale flotation tests for diasporic bauxite ore and micro-flotation tests for relevant pure minerals (including diaspore, pyrophyllite and kaolinite) were carried out at different conditions ...

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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

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

2017-12-1  As it was noted, diasporic bauxite ores (diaspore is naturally hydrophilic) have a low Al/Si mass ratio, and an extensive comminution has to be performed on the ore in order to liberate value and gangue minerals and prepare them for selective interaction with reagents (direct and reverse flotation) (Wen-li et al., 2014, Kurusu et al., 2009).

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Separation of diaspore from bauxite by selective ...

2014-4-25  Selective flocculation is a new method to solve the problem of China’s bauxite de-silication besides flotation and reverse flotation. The method of selective flocculation of bauxite using hydrolyzed polyacrylamide as flocculant was experimented and evaluated. The results of diaspore and kaolinite single mineral settling tests show that the difference between settlement yield of kaolinite ...

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

By reverse flotation of the ore, a high-grade bauxite concentrate with A/S ratio 8.54 was obtained, however the Al2O3 recovery remained low at 42.87%. Although the A/S rate achieved by the ...

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

The Al/Si mass ratio of bauxite for feeding the Bayer process has to be more than 8. • The Al/Si in diaspore is less than 6 and has to pretreat before feeding to the process. • Flotation has been typically used to increase the mass ratio of Al/Si diaspore ores. • This study reviewed how different flotation factors can effect on upgrading ...

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The Impact of Backwater Iron Ions on Bauxite Flotation ...

2018-2-2  The effect of iron ions in backwater on the flotation of diaspore bauxite was investigated by ICP measurement, micro-flotation tests, zeta potential measurements and solution chemistry analyses. The concentration of iron ions in backwater was 1 × 10 −5 mol/L measured by ICP. The micro-flotation results indicated that iron ions activated the ...

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Experimental and molecular dynamics simulation study on ...

2021-4-1  1. Introduction. In China, bauxite reserves are general diaspore resources with Al 2 O 3 /SiO 2 mass ratio ranging from 4 to 6 (Deng et al., 2016).To prepare for the feed of Bayer process (normally Al 2 O 3 /SiO 2 mass ratio is more than 8), flotation is an effective physical separation method commonly used to remove part of aluminosilicate gangue minerals such as kaolinite, illite and ...

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Flotation techniques for separation of diaspore from ...

Bench scale flotation tests for diasporic bauxite ore and micro-flotation tests for relevant pure minerals (including diaspore, pyrophyllite and kaolinite) were carried out at different conditions ...

More

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 ...

More

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

By reverse flotation of the ore, a high-grade bauxite concentrate with A/S ratio 8.54 was obtained, however the Al2O3 recovery remained low at 42.87%. Although the A/S rate achieved by the ...

More

2003-Flotation de-silicating from diasporic-bauxite with

2015-4-3  AbstractUsing cetyl trimethylammonium bromide (CTAB) as collector, the flotation de-silicating from diasporic-bauxite was investigated. And the Zeta potentials and contact-angles of silicate minerals and diaspore were also stu-(died.)The results show that in the presence of 2×10~(-4) molL~(-1)CTAB, the surface charges of pyrophyllite, kaolinite and illite become more positive, and the cont...

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Flotation de-silicating from diasporic-bauxite with cetyl ...

【Abstract】 Using cetyl trimethylammonium bromide (CTAB) as collector, the flotation de-silicating from diasporic-bauxite was investigated. And the Zeta potentials and contact-angles of silicate minerals and diaspore were also stu-(died.)The results show that in the presence of 2×10~(-4) molL~(-1)CTAB, the surface charges of pyrophyllite, kaolinite and illite become more positive, and ...

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The Impact of Backwater Iron Ions on Bauxite Flotation ...

2018-2-2  The effect of iron ions in backwater on the flotation of diaspore bauxite was investigated by ICP measurement, micro-flotation tests, zeta potential measurements and solution chemistry analyses. The concentration of iron ions in backwater was 1 × 10 −5 mol/L measured by ICP. The micro-flotation results indicated that iron ions activated the ...

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Desulfurization in high-sulfur bauxite with a novel ...

The flotation results proved experimentally that 2-BTHA could significantly improve the flotation grade and recovery of pyrite under weak acid conditions, have a good selectivity for a gangue mineral (diaspore), and achieve an excellent desulfurization effect in high-sulfur bauxite.

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

Diaspore pretreatment by flotation favors several conditions and possesses certain limitations. This study has systematically explored various effective flotation factors (particle size, surface electrical charge, collectors, depressants, dispersants, flocculation and aggregation) and limitations in the pretreatment of diaspore and has compiled ...

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Effects of sodium hexmetaphosphate on flotation

2005-8-1  In order to offer high grade concentrate to produce alumina by Bayer, the reverse-flotation technology of bauxite was investigated. The results show that sodium hexmetaphosphate has different depression on the flotation of diaspore and kaolinite. The recoveries of diaspore decrease markedly with the increase of the concentration of sodium hexmetaphosphate with dodecyl-amine as collector ...

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Effect of Phosphate and Fluoride on the Flotation of ...

2013-7-18  Phosphates and fluorides are adopted as regulators for the removal of silicates from diasporic-bauxite by flotation. Micro-flotation tests show that sodium hexametaphosphate has a stronger depressing power on diaspore than sodium fluorosilicate at pH 6.5 while using dodecylamine chloride as a

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Frontiers Flotation Separation of Diaspore and Kaolinite ...

2019-12-12  Introduction. Bauxite is an important raw material for industrial production of alumina (Zhang et al., 2017a, 2018a).In China, diaspore is the primary mineral in bauxite, accounting for more than 98% of the total reserves (Zhang et al., 2016).China's bauxite

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学者频道_科创中国

Interfacial chemistry in flotation of diasporic bauxite 摘要: China has abundant bauxite resources, but these resources are mostly of a diaspore, which has a feature of low Al2O3 to SiO2 mass ratio, typically ranging from four to six.

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

2021-4-2  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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Flotation de-silicating from diasporic-bauxite with cetyl ...

【Abstract】 Using cetyl trimethylammonium bromide (CTAB) as collector, the flotation de-silicating from diasporic-bauxite was investigated. And the Zeta potentials and contact-angles of silicate minerals and diaspore were also stu-(died.)The results show that in the presence of 2×10~(-4) molL~(-1)CTAB, the surface charges of pyrophyllite, kaolinite and illite become more positive, and ...

More

2003-Flotation de-silicating from diasporic-bauxite with

2015-4-3  AbstractUsing cetyl trimethylammonium bromide (CTAB) as collector, the flotation de-silicating from diasporic-bauxite was investigated. And the Zeta potentials and contact-angles of silicate minerals and diaspore were also stu-(died.)The results show that in the presence of 2×10~(-4) molL~(-1)CTAB, the surface charges of pyrophyllite, kaolinite and illite become more positive, and the cont...

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Theory And Technology Of Floatation On Bauxite Desilicate

2002-2-6  The point of zero charge (P.Z.C) of diaspore is pH5.5, and pH3.4 for kaolinite.2. Obverse floatation of bauxite using anion collectorOn the obverse floatation of bauxite, the primary factor to result in difference on floatability for kaolinite and diaspore is the difference on abundance of aluminum atom on minerals surface.

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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 ...

More

Effect Of Surfactants On Flotation Of Diaspore By Sodium ...

With a systematic study on the effect and mechanism of surfactants on flotation of diaspore by sodium oleate, and following results were obtained:When sodium oleate was used as the collector, the flotability of the-5μm diaspore was under the average value significantly.

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

Diaspore pretreatment by flotation favors several conditions and possesses certain limitations. This study has systematically explored various effective flotation factors (particle size, surface electrical charge, collectors, depressants, dispersants, flocculation and aggregation) and limitations in the pretreatment of diaspore and has compiled ...

More

Effect of Phosphate and Fluoride on the Flotation of ...

2013-7-18  Phosphates and fluorides are adopted as regulators for the removal of silicates from diasporic-bauxite by flotation. Micro-flotation tests show that sodium hexametaphosphate has a stronger depressing power on diaspore than sodium fluorosilicate at pH 6.5 while using dodecylamine chloride as a

More