Low-grade diasporic bauxite in central Guizhou Province, China, contains Li that can be exploited and utilized. In this paper, several methods were used to Study In this paper, several methods were used to determine the main chemical components in low-grade diasporic bauxite, which were Al2O3, SiO2 and TiO2, and the Study on the Occurrence State of Lithium in Low-Grade
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A novel and environmentally friendly design for low-grade diasporic-bauxite processing has been developed. It applies the theory of green design to a fundamental The principles of a hydrochemical path for processing low grade diasporic bauxite, laboratory digestion results from processing three low-grade diasporic bauxites, The Hydrochemical Series Process for Low Grade
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Ga in the low-grade bauxite was mainly associated with diaspore. In the low-grade bauxite, anatase is the main carrier mineral for V. REEs were present in the low-grade bauxite in multiple modes of Bauxite containing less than 50% Al 2 O 3 is called low-grade bauxite ore, which is generally used for the production of aluminum appliances such as abrasives, Advances in Beneficiation of Low-Grade Bauxite SpringerLink
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Due to the rapid depletion and limitation of high grade gibbsitic/boehmitic bauxite (Al/Si more than eight), attention has been drawn to the abundant low grade The first type plateau bauxite consists of extensive plateau areas with thick continuous ore layers, found in the northern deposits, such as Oriximiná PA Separation of silica from bauxite via froth flotation
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A new environmentally friendly design for low-grade diasporic-bauxite processing which is different from the Bayer and sintering processes was proposed in alumina production processes for low grade bauxite, such as Bauxite Flotation followed by the Bayer process and the Bayer-Sinter Series process, as well as Progress in Research and Development of Alumina
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Among them, low-grade diasporic bauxite ore is widely found in highly weathered regions, such as China, Yugoslavia and Greece. In China, it amounts to about 98% of the bauxite resource, 2 characterized by finely disseminated mineral complexes, high contents of iron and silicon, low mass ratio of alumina to silica (A/S), etc. 3 Currently, Low-grade diasporic bauxite in central Guizhou Province, China, contains Li that can be exploited and utilized. In this paper, several methods were used to determine the main chemical components in low-grade diasporic bauxite, which were Al2O3, SiO2 and TiO2, and the main minerals were diaspore, boehmite, kaolinite, illite and anatase. Study on the Occurrence State of Lithium in Low-Grade Diasporic Bauxite
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low-grade bauxite was still 2.30, remaining roughly the same. It indicated that thermal activation did not have the ability to change the A/S of low-grade bauxite, but only removed part of the bound water. Compared with Fig. 1, it can be seen from Fig. 2 that the mineral composition of low-grade bauxite had a significantThe 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 Ionic Effect of NaCl and KCl on the Flotation of Diaspore
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Gibbsitic–diasporic bauxite: At 1400 °C for 180 min (a mole ratio of reducible oxygen to the carbon of 0.5) With alumina recovery of 86.09% and iron removal of 89.24% [93] Reduction roasting: Gibbsitic–diasporic bauxite: At 1425 ℃ for 15 min with 11.92% anthracite, 1.96% CaF 2 (a CaO/SiO 2 mass ratio of 1.25) With the iron recovery This paper introduces a novel process to efficiently utilize medium-/low-grade or waste bauxite.The medium-/low-grade or waste bauxite is usually rich in iron oxide (total iron oxide content≥8%) or titanium dioxide (titanium dioxide content≥5%). In addition, both iron oxide and titanium dioxide have higher contents than typical bauxite (total iron Novel process for synthesizing fused mullite from
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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.In this study, diasporic bauxite was mechanically activated for different durations (15, 30, 60, 90 and 120 min) by the planetary mono mill. The speed of the main disk and ball-to-mass ratio were kept constant at 600 rev min−1 and 25, respectively. The chemical composition of the ore was determined via X-ray fluorescence. Structural Dehydroxylation of high-energy ball-milled diasporic bauxite
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The separation of Al from the silicon-rich diasporic bauxite is of great significance in alumina production. Herein, we proposed a low-temperature ammonium sulfate roasting-water leaching process to extract aluminum from silicon-rich diasporic bauxite. Parameters including roasting temperature, dosage of ammonium sulfate, A low grade bauxite sample of central India was thoroughly characterized with the help of stereomicroscope, reflected light microscope and electron microscope using QEMSCAN. A few hand picked samples were collected from different places of the mine and were subjected to geochemical characterization studies. The geochemical studies Characterization and Beneficiation Studies of a Low Grade Bauxite
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In recent years, the rapid development of the domestic alumina industry has greatly accelerated the consumption of high-alumina–silica-ratio bauxite resources in China. The development of an For low-grade diasporic bauxite with an Al 2 O 3 to SiO 2 mass ratio of below 8, a sintering process (Jiang et al., 2002) or a combined sintering and Bayer process can be used (Zhao et al., 2004Separation of silica from bauxite via froth flotation
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The wet screening rejects material lower than a certain size, and, at the same time, washes the fine material (adhering to the larger pisolites) which is also high in silica concentration. Beneficiation of low-grade diasporic bauxite with hydrocyclone. Transactions of Nonferrous Metals Society of China (2008)Characterization of the Sulfur-Bearing Diasporic Bauxite. The chemical compositions of low- and high-sulfur diasporic bauxite, Al concentrate and S concentrate are given in Table I. It is seen that the high-sulfur diasporic bauxite contains 54.63% Al 2 O 3, 14.53% Fe 2 O 3, 8.25% SiO 2 and 4.49% S T. Accordingly, the A/S ratio of the highA Case Study of Producing Alumina from High-Sulfur Diasporic Bauxite
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Low-grade diasporic bauxite in central Guizhou Province, China, contains Li that can be exploited and utilized. In this paper, several methods were used to determine the main chemical components in low-grade diasporic bauxite, which were Al2O3, SiO2 and TiO2, and the main minerals were diaspore, boehmite, kaolinite, illite and anatase. Flotation of diasporic bauxite minerals. Froth flotation is effective for pre-treating the low-grade diasporic bauxite ores thereby to increase Al/Si mass ratio and prepare the inferior feed for the Bayer process [37,130]. Both direct flotation and reverse flotation processes were widely studied for the upgrading of the diasporic bauxite ores.A review of the surface features and properties, surfactant
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Synergistic collection mechanism of D-phenylalanine and sodium oleate in flotation of diaspore from kaolinite. The major method of alumina production is the Bayer process [1]. The mass ratio of Al2O3 and SiO2 (A/S) of bauxite feed for Bayer process requires more than 8 or even 10 [2–4]. However, about 98% percent of ores are low variation in the chemical composition of low-grade bauxite under different thermal activation temperatures. It can be seen from Table 1 that the content of alumina and silica were 55.75 and 24.21%, respectively. The A/S ratio of the low-grade bauxite sample was about 2.30, and it was a typical low-grade bauxite with high alumina, highEffect of Thermal Activation Temperature on Pre
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For low-grade diasporic bauxite with an Al 2 O 3 to SiO 2 mass ratio of below 8, a sintering process (Jiang et al., 2002) or a combined sintering and Bayer process can be used (Zhao et al., 2004The low-grade bauxite sample was obtained from Henan province, China. The chemical and mineralogical compositions of the bauxite sample were analyzed by X-ray fluorescence (XRF) and X-ray diffraction (XRD), and the results are given in Table 1, and Fig. 1, respectively. The A/S of the sample is 3.19, which belongs to a typical low-grade Flotation enhancement of low-grade bauxite using oxalic
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