Mineralogical characteristics of the superlarge Quaternary bauxite deposits in Jingxi and Debao counties, western Guangxi, China

Liu, Xuefei; Wang, Qingfei; Zhang, Qizuan; Feng, Yuewen; Cai, Shenshen

doi:10.1016/j.jseaes.2012.02.011

Cited by 61 publications

(21 citation statements)

References 33 publications

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“…These inferred conditions obviously differ from those calculated by other authors for the formation of bauxite (light grey area in Fig. 12b: Temur and Kansun, 2006;Zarasvandi, 2012;Liu et al, 2012Liu et al, , 2013, which instead requires selective leaching of Fe (apart from Si) generally obtained under more reducing conditions and higher pH.…”

Section: The Laterite-forming Environmentcontrasting

confidence: 84%

“…The two thick vertical lines, dark grey in color, broadly correspond to the kaolinite-in (Kln) and gibbsite-in (Gbs) curves (from Dangic, 1985). b: Eh-pH diagram showing environments under atmospheric conditions (from Garrels and Christ, 1965) and the inferred conditions of formation of the Balkouin laterite (dark grey field), which are compared with those suggested for karstic bauxite from different localities (light grey: data from from Temur and Kansun, 2006;Zarasvandi, 2012;Liu et al, 2012Liu et al, , 2013.…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

The lateritic profile of Balkouin, Burkina Faso: Geochemistry, mineralogy and genesis

Giorgis

Bonetto

Giustetto

et al. 2014

Journal of African Earth Sciences

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Section: The Laterite-forming Environmentcontrasting

confidence: 84%

Section: Discussionmentioning

confidence: 99%

The lateritic profile of Balkouin, Burkina Faso: Geochemistry, mineralogy and genesis

Giorgis

Bonetto

Giustetto

et al. 2014

Journal of African Earth Sciences

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“…In these trials, pulverized samples of approximately 10 mg were heated from 20 to 800°C at 10°C min -1 under a 100 mL min -1 flow of nitrogen. Using an alumina standard, semiquantitative estimates of aluminum and iron hydroxide in the samples were made based on the TG/DTG results [2,20].…”

Section: Sampling and Methodologymentioning

confidence: 99%

“…This deposit, consisting of more than 0.3 billion tons of ore scattered throughout Quaternary laterite, has been explored [1,2], but has only just begun to be exploited. The deposit was originally discovered through an exploration program sponsored by the Ministry of Land and Resources, China.…”

Section: Introductionmentioning

confidence: 99%

Mineralogical and thermal characteristics of low-grade Jinlong bauxite sourced from Guangxi Province, China

Wang

Xing

Zhang

et al. 2015

J Therm Anal Calorim

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Characteristic samples from the No. 1 ore body of the Jinlong bauxite deposit in Guangxi Province, China, were assessed to determine their chemical composition using whole-rock geochemical analysis, their mineral components using X-ray diffraction, their thermal characteristics via differential thermal analysis, thermogravimetry and differential thermogravimetry, and their dissemination characteristics by scanning electron microscopy/energydispersive spectrometry. The results show that the average Al 2 O 3 content in the Jinlong bauxite deposit is 41 % and that the Al 2 O 3 /SiO 2 ratio is approximately 2.17, and thus, the ore may be defined as low-grade bauxite. The main minerals found in the ore were diaspore (20.3-43 %), gibbsite, clays and hematite. In differential thermal analysis results, the bauxite samples exhibit two distinct endothermic peaks, with the dehydration of gibbsite occurring in the 200-260°C range and the dehydration of diaspore occurring in the 524-550°C range. Thermogravimetry and differential thermogravimetry indicate four decomposition stages: evaporation of adsorbed water (50-160°C), gibbsite decomposition (190-280°C), goethite decomposition (190-280°C) and diaspore dehydroxylation (460-580°C). The diaspore belongs to the orthorhombic dipyramidal class and exists primarily in three dissemination forms-euhedral and subhedral grain, bean and oolitic shaped, and aphanitic and microcrystalline aggregates, and is always accompanied by kaolinite and pyrophyllite.

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“…In China, more than 0.5 billion tons of high ferrous bauxite has been explored in the last 20 years (Liu et al 2012, Wang et al 2011). These high ferrous bauxite is mainly composed of gibbsite (Al(OH) 3 ), diaspore (AlOOH), goethite (FeOOH), hematite (Fe 2 O 3 ) and kaolinite (Al 2 Si 2 O 5 (OH)4· 2H 2 O), the content of Al 2 O 3 and Fe 2 O 3 is over 65wt%, the content of SiO 2 is about 7-12wt% & Zhang et al 2014).…”

Section: Type Areamentioning

confidence: 99%

Early stage hydration properties of calcium aluminosilicate slag

Zhang¹,

Qi²,

Zou³

2016

Proceedings of the 2016 6th International Conference on Advanced Design and Manufacturing Engineering (ICADME 2016)

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ABSTRACT:The calcium aluminosilicate slag cement clinker was prepared from bauxite-coal composite pellets by high temperature reduction and smelting process. The hydration results show that, after hydration for 28 days, the hydration products of calcium aluminosilicate slag are mainly composed of killalaite (Ca3.2(H0.6Si2O7)(OH)), calcium silicate hydrate (Ca1.5SiO3.5 · xH2O) and calcium aluminates hydroxid (3CaO·Al2O3·Ca(OH)2·18·H2O, Ca12Al13.86Fe0.14(OH)2). With the increase of w(CaO)/w(SiO2) ratio, the killalaite disappeared, the 3CaO ·Al2O3·Ca(OH)2·18·H2O and Ca12Al13.86Fe0.14(OH)2 amounts were increased gradually as a function of w(CaO)/w(SiO2) ratio. The C3A and C12A7 have very exothermic hydration characteristic and faster hydration rate, promoted the hydration activity of β -C2S. The calcium aluminosilicate slag cement clinker has a higher reactivity during the early stage of the hydration process.

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Mineralogical characteristics of the superlarge Quaternary bauxite deposits in Jingxi and Debao counties, western Guangxi, China

Cited by 61 publications

References 33 publications

The lateritic profile of Balkouin, Burkina Faso: Geochemistry, mineralogy and genesis

The lateritic profile of Balkouin, Burkina Faso: Geochemistry, mineralogy and genesis

Mineralogical and thermal characteristics of low-grade Jinlong bauxite sourced from Guangxi Province, China

Early stage hydration properties of calcium aluminosilicate slag

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