Genesis of the Permian karstic Pingguo bauxite deposit
The bauxite ore is mainly diaspore, pyrite, chamosite, and anatase, whereas the argillaceous bauxite contains diaspore, kaolinite, pyrophyllite, pyrite, and anatase. …
A review of pretreatment of diasporic bauxite ores by …
Role of crystal structure in flotation separation of diaspore from kaolinite, pyrophyllite and illite. Miner. Eng. (2003) Z. Huang et al. ... and the A/S was increased from 10.68 to 15.27 in bench-scale flotation of a bauxite ore. The FTIR spectra and zeta potential analysis shows that BHA can promote the adsorption of NaOL on diaspore, and ...
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. The result of XRD of ...
Provenance and Tectonic Evolution of Bauxite Deposits in …
Abundant bauxite deposits formed in the Tethyan Metallogenic Domain are of great importance to bauxite research. However, previous studies generally focus on local bauxite occurrences formed over certain geologic time. A comprehensive understanding of the genesis and characteristics of bauxite deposits is hence essential.
Significance of particle aggregation in the reverse flotation …
For direct flotation of low grade bauxite ore, gibbsite or diaspore can be floated with hydroxamate collector at high pH (pH 9–10), in the meantime, the silicate minerals …
XRD pattern of the pyrophyllite ore. P pyrophyllite, Q …
A pyrophyllite [Al2Si4O10(OH)2] ore as an alternative source for alumina (Al2O3) was intensively milled for mechanical activation to increase aluminum extraction by acid leaching method.
Separation of aluminosilicates and diaspore from diasporic-bauxite …
The flocculation of fine diaspore, kaolinite, illite and pyrophyllite and their artificial mixed minerals and bauxite ore were systematically investigated by the sedimentation tests.
Chemical composition of the pyrophyllite ore used in the …
In this study, hydrometallurgical processing of a pyrophyllite ore with 23.6% Al2O3 grade from Pütürge (Malatya, Turkey) which contains quartz and various aluminum silicate clay minerals like ...
CHARACTERIZATION of MECHANICALLY ACTIVATED PYROPHYLLITE ORE …
In this study, pyrophyllite (Al2(Si4O10)(OH)2) was first-time evaluated as an alumina (Al2O3) source using a pyrophyllite ore with 23.60% Al2O3, containing mainly pyrophyllite, less quartz and ...
Aluminum Recovery by Acid Leaching of Variously Enriched Pyrophyllite …
Effects of pre-treatment methods such as calcination for thermal activation and intensive milling for mechanical activation on the aluminum (Al) recovery by acid leaching of preliminarily enriched pyrophyllite ore via attrition scrubbing and froth flotation were investigated. XRD patterns of the calcined and the intensively milled samples were …
Mechanical activation of pyrophyllite ore for aluminum …
metallurgical to grade bauxite ores by the standard Bayer process. Nowadays, non-bauxitic raw materi- ... [2, 7] and pyrophyllite ore [8] before leaching for higher aluminum extraction. Birinci et ...
Rare earth element geochemical characteristics of the late …
The Gano karst bauxite deposit is located in the eastern Alborz Mountains, 90 km NE of Semnan city, northern Iran. The layers and lenticular patches of bauxite are hosted in the Triassic karstified carbonate rocks interbedded with calcareous shale of the Elika Formation, unconformably overlain by siliciclastics of the early Jurassic Shemshak …
A review of pretreatment of diasporic bauxite ores by …
Bauxite is the principal ore of aluminum processed through conventional Bayer process that involves the ore digestion in concentrated NaOH at a 150-230°C temperature and * 20 atm. pressure [1] [2 ...
Significance of particle aggregation in the reverse flotation …
An important result of recent bauxite flotation research was the opening in 2002 of the first bauxite mineral processing plant in China (and in the world) which uses direct flotation to prepare a bauxite concentrate for the Bayer process (Zhao et al., 2010). One million tons/yr of bauxite ore can be treated at this plant.
(PDF) Pyrophyllite: An Economic Mineral for …
of pyrophyllite can be combined with fireclay, zirconia, or bauxite to make high-alumina. ... method was used to upgrade pyrophyllite ore that contains quartz and kaolinite as gangue. minerals ...
Acid leaching performance of mechanically …
In this study, hydrometallurgical processing of a pyrophyllite ore with 23.6% Al2O3 grade from Pütürge (Malatya, Turkey) which contains quartz and various aluminum silicate clay minerals like ...
Mechanical activation of pyrophyllite ore for aluminum …
A pyrophyllite [Al2Si4O10(OH)2] ore as an alternative source for alumina (Al2O3) was intensively milled for mechanical activation to increase aluminum extraction by acid leaching method. For this purpose, unmilled and milled ore samples were compared to reveal the changes caused by intensive milling. The samples were also leached in HCl …
Characterization of ASTER spectral bands for mapping of Pyrophyllite …
The Bundelkhand Craton located in the northern part of the Indian Shield had been subjected to polyphase deformation and polyphase metamorphism in several episodes from Archaean to early Proterozoic times. The Craton comprises pyrophyllite-diaspore deposits mainly along the NE-SW trending shear system indicated by …
Characterization Study of some Bauxite Deposits in …
Alumina is produced from bauxite, which contains a mixture of various oxides, such as aluminum (Al), iron (Fe), silicon (Si), and titanium (Ti). Bauxite can also be considered a source of several other valuable metals, such as scandium (Sc), vanadium (V), and gallium (Ga). The composition and mineralogy of alumina determine their …
Aluminum Recovery by Acid Leaching of Variously Enriched Pyrophyllite …
Pyrophyllite ore purchased from Malatya Pütürge deposits containing mainly pyrophyllite along with quartz and kaolinite, and minor disten was used. Planetary ball mill with tungsten carbide ...
Mineralogical and thermal characteristics of low-grade Jinlong bauxite
The results show that the average Al2O3 content in the Jinlong bauxite deposit is 41 % and that the Al2O3/SiO2 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 …
Thermal Behavior of Pyrophyllite Ore during Calcination for …
In the production of alumina (Al 2 O 3 ) from clays by acid leaching, thermal activation by calcination is applied widely as a pre-treatment to improve the dissolution of aluminum. Previous studies have focused only on the thermal behavior of high-purity kaolinite and pyrophyllite, individually. However, thermal activation of complex clay …
Advances in Beneficiation of Low-Grade Bauxite | SpringerLink
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 …
Flotation de-silicating from diasporic-bauxite with cetyl
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. The result of XRD of the bauxite concentrate shows that pyrophyllite is easier to be removed from diasporic-bauxite than illite and kaolinite due to its better …
(PDF) Pyrophyllite: An Economic Mineral for Different Industrial
of pyrophyllite can be combined with fireclay, zirconia, or bauxite to make high-alumina. ... pyrophyllite ore that contains quartz and kaolin ite as gangue minerals (Table 6). The study
Optimization of iron and aluminum recovery in bauxite
Utilization of low-grade bauxite for alumina production has become a worldwide urgent issue due to the increasing aluminum demand and the lack of high-quality bauxite ores [].Low-grade bauxite usually contains high iron, high sulfur or high silicon minerals [2,3,4].Typically, in low-grade high-iron bauxite, the main ferrous phases are α …
Flotation separation of diaspore from kaolinite, pyrophyllite and
In this study, low-grade bauxite ore from Seydişehir (Konya, Turkey) containing 57.33% Al2O3 and 9.01% SiO2, (A/S = 6.36) was investigated to determine the modal mineralogy and mineral liberation ...
Geochemical characteristics of the karst-type bauxites: an
The Kanirash bauxite deposit belongs to the Iran-Himalayan karst-type bauxite belt, which is situated about 30 km southeast of Mahabad city, northwestern …
Interactions between bubble and particles of key minerals of …
Diasporic bauxite, one of the typical types of bauxite ore which is mainly distributed in a few countries such as China, contributed a considerable source of aluminum metal to the world. The valuable mineral of diasporic bauxite is diaspore and the main …