behavior of sio2 in the leaching process of alumina clinker

behavior of sio2 in the leaching process of alumina clinker

Behavior of SiO2 in the leaching process of alumina ...

Oct 01, 2008  As a whole, the variation of SiO2 concentration is inapparent. The effect of sodium carbonate concentration on the SiO2 concentration is not re- B. Chen et al., Behavior of SiO2 in the leaching process of alumina clinker with high concentration 541 markable. This is coincident with the conclusions of the published report [6]. 3.5.

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Behavior of SiO2 in the leaching process of alumina ...

It is essential for alumina production by alkaline process to know the behavior of minerals containing Al and Si in basic solution, and the behavior of SiO 2 in the process of clinker leaching is an important portion. To study the behavior of SiO 2 in the process of high concentration clinker leaching, experiments were carried out in home-made reactors.

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Behavior of SiO2 in the leaching process of alumina ...

Behavior of SiO2 in the leaching process of alumina clinker with high concentration J u n l f n v r i f ce c n e h oo yBe n o r a ie st o in ea dT c n lg i g oU y S i f Vo u e 1 . m be 。

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Behavior of SiO2 in the leaching process of alumina ...

Article “Behavior of SiO2 in the leaching process of alumina clinker with high concentration” Detailed information of the J-GLOBAL is a service based on the concept of Linking, Expanding, and Sparking, linking science and technology information which hitherto stood alone to support the generation of ideas. By linking the information entered, we provide opportunities to make unexpected ...

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Behavior of SiO2 during Leaching Process of Alumina Sinter

Abstract: Some important secondary reactions during alumina sinter leaching have been analyzed thermodynamically, and the behavior of SiO2 in the process also investigated. The results show that 2CaO×SiO2 can exist much more stably in caustic solution than in

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Behavior of SiO2 in the leaching process of alumina ...

Behavior of SiO2 in the leaching process of alumina clinker with high concentration J u n l f n v r i f ce c n e h oo yBe n o r a ie st o in ea dT c n lg i g oU y S i f Vo u e 1 . m be 。

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Behavior of SiO2 during Leaching Process of Alumina Sinter

Abstract: Some important secondary reactions during alumina sinter leaching have been analyzed thermodynamically, and the behavior of SiO2 in the process also investigated. The results show that 2CaO×SiO2 can exist much more stably in caustic solution than in

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Decomposition Property of γ-2CaOSiO2 during Leaching ...

B. Chen, X. Li, G. Liu, “Behavior of SiO 2 in the leaching process of alumina clinker with high concentration,” Jorunal of University of Science and Technology

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Mineral Transition and Chemical Reactivity Evolution of a ...

Aug 02, 2019  The mineral formation-transition mechanism, microstructure evolution, crystal structure, pulverization property, and chemical reactivity of the CaO-Al2O3-SiO2 clinker with MgO and Na2SO4 dopants during the sintering process at 1300 °C for 2.0 h were systematically studied using CaO, Al2O3, SiO2, MgO, and Na2SO4 as raw materials when the molar ...

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Efficient separation of alumina and silica in reduction ...

Feb 01, 2019  Alkali leaching was employed to investigate the separation of alumina and silica in roasted kaolin obtained by roasting kaolin alone in air at 1273 K for 60 min and in clinker prepared by roasting the mixed raw meal of kaolin, ferric oxide and coal powder with Fe 2 O 3 /Al 2 O 3 /C molar ratio of 1.2:2.0:1.2 in reducing atmosphere at 1373 K for 60 min. The thermodynamic analyses and alkali ...

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Synthesis and alumina leaching mechanism of calcium ...

of GOODBOY [11]. He found that C4A3S clinker has a good alumina leaching property. It substitutes 12CaO7Al2O3 as the main phase while the C/A (molar rate between CaO and Al2O3) decreases from 1.71 to 1.33, and a high alumina leaching property is achieved under the condition of low calcium and aluminum. The source of sulfur of the process is ...

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CN105540628B - The method that sulfur bauxite lime ...

The present invention relates to technical field of alumina production, specifically disclose a kind of method that sulfur bauxite lime sintering produces aluminum oxide, the method being sintered by being properly added a small amount of flue gas desulfurization slag and lime in sulfur bauxite produces aluminum oxide, makes the aluminium element and element sulphur formation 4CaO3Al in raw ...

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(PDF) Metallurgical process for valuable elements recovery ...

Red mud, namely bauxite residue or red sludge, is a potential valued solid waste produced from the alumina extraction process with substantial reserve of over 2.7 billion tonnes worldwide. Taking into account the rise in iron ore price and scarcity

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CONCRETE Optimizing the Use of Fly Ash in Concrete

compromising the construction process or the quality of the finished product. For the purposes of this document the replacement levels shown in Table 1 will be used to represent low, moderate, high and very high levels of fly ash. By: Michael Thomas, Ph.D., P.Eng., Professor of Civil Engineering, University of New Brunswick Figure 1.

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Cui, Yali: Kostenloses Herunterladen. Elektronische ...

Cui, Yali: Kostenloses Herunterladen. Elektronische Bibliothek. Online-Bücher in Z-Library BookSC. Download books for free. Find books

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Airiti Library華藝線上圖書館

查詢符號(半形) 查詢符號意義說明: 空格: 表示為「AND」兩個查詢詞之交集 雙引號 ( " " ) 片語以雙引號標示開始及結束,而且只尋找出現順序相同的字詞,例 : " image process "

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Mineral Transition and Chemical Reactivity Evolution of a ...

The mineral formation–transition mechanism, microstructure evolution, crystal structure, pulverization property, and chemical reactivity of the CaO–Al2O3–SiO2 clinker with MgO and Na2SO4 dopants during the sintering process at 1300 °C for 2.0 h were systematically studied using CaO, Al2O3, SiO2, MgO, and Na2SO4 as raw materials when the molar ratio of CaO to Al2O3 is 1.4, the mass ratio ...

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Synthesis and alumina leaching mechanism of calcium ...

of GOODBOY [11]. He found that C4A3S clinker has a good alumina leaching property. It substitutes 12CaO7Al2O3 as the main phase while the C/A (molar rate between CaO and Al2O3) decreases from 1.71 to 1.33, and a high alumina leaching property is achieved under the condition of low calcium and aluminum. The source of sulfur of the process is ...

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Leaching Of Samples Contaminated With Toxic Metals ...

The most commonly used cement is composed of 96% clinker and 4% of gypsum plaster. The clinker is produced by the thermal treatment in rotary kilns at high temperatures from a rocky material usually containing 80% calcium carbonate (CaCO 3), 15% silicon dioxide (SiO 2), 3% aluminum

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The Sintering and Leaching of Low-Grade Diasporic Bauxite ...

An improved lime-sintering process was developed to produce alumina from low-grade diasporic bauxite in this paper. Both clinkers sintered by the real bauxite and simulated bauxite at 1350 °C when the molar ratio of CaO to Al2O3 decreased to 1.4 were produced, the alumina leaching rates of which reached over 90% in sodium carbonate liquor. The main phases in the clinkers after sintering are ...

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Extraction of Alumina from Nawan Kaolin by Acid Leaching ...

Introduction. Alumina that exists as a stable form (α-alumina) and in a variety of meta-stable forms including γ-alumina 1 is an important industrial mineral, which can be used as an abrasive material and as adsorbent. 2 Alumina has been widely used in advanced technological applications including its use for the processing of high-quality insulators, 3 semiconductors, 4 microelectronics, 5 ...

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A Novel Process of Alumina Production from Low-Grade ...

Feb 12, 2017  The phase of alumina transforms from 12CaO7Al 2 O 3 (C 12 A 7) to 4CaO3Al 2 O 3 SO 3 (C 4 A 3 S), whose alumina leaching property is better, through decreasing sinter temperature and time and adjusting the content of CaSO 4 of the raw materials of lime sintering process. The main phases of the clinker sintered at 1250 °C are C 4 A 3 S ...

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A Mathematical Model for Control and Optimization of ...

Rotary Alumina Kiln Process . WEI PENG, RENE V. MAYORGA Faculty of Engineering and Applied Science . University of Regina, 3737 Wascana Parkway, Regina, Saskatchewan, S4S 0A2, CANADA . Abstract: Temperature is a crucial factor for clinker quality in the Industrial Rotary Alumina Kiln Process

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Phase Transformation of Hercynite During the Oxidative ...

May 20, 2020  Alkali leaching of silica from activation-roasted high-silica bauxite can increase the mass ratio of alumina to silica (A/S) in the residue and favors alumina extraction by the Bayer process.15,16,17 However, the formation of 3Al 2 O 3 2SiO 2 Al–Si spinel during roasting kaolinite alone causes a low silica leaching ratio.18,19 As such, this ...

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Title 廻転炉焼成法に依るアルミナ製造の研究(第2報) Sub Title

ores having different ratio SiO2 or Fe2O3 to Al2O3. It was recognized that the range of clinkering ... examined for the purpose of using them to solve the mechanism of the reaction in the leaching process and to suppose what kinds of calcium-compounds would be formed in the clinker. ... This behavior of dicalcium-silicate with NaAlO2 solution ...

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Bayer process - Wikipedia

The Bayer process is the principal industrial means of refining bauxite to produce alumina (aluminium oxide) and was developed by Carl Josef Bayer.Bauxite, the most important ore of aluminium, contains only 30–60% aluminium oxide (Al 2 O 3), the rest being a mixture of silica, various iron oxides, and titanium dioxide. The aluminium oxide must be purified before it can be refined to ...

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Comparative study on utilization of different types of ...

Jun 09, 2020  In this study, two types of municipal solid waste incineration (MSWI) bottom ash (BA) (MSWI-BA-A, water quenched, MSWI-BA-B, natural cooling), are utilized as alternative materials for clinker sintering. Fixed clinker modulus (lime saturation ratio = 0.90 ± 0.01, silica modulus = 2.6 ± 0.1 and alumina modulus = 1.5 ± 0.1), designed gradient addition ratio of MSWIBA (0, 3%, 6%, 9% and

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FR2832428A1 - PROCESS FOR TREATING MACHEFER TO FIGHT ...

The present invention relates to the use of an aluminum corrosion inhibitor for treating clinkers useful for road engineering in order to control in situ the electrochemical behavior of aluminum in order to combat swelling problems, a clinker treatment process intended to reduce volume disorders linked to the presence of aluminum as well as clinker capable of being obtained by this process.

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Feasibility study on the utilization of coal mining waste ...

Apr 30, 2019  In that sense, the use of CMW provides silicon and aluminum which are required components in the clinker raw meal, so it could replace clay. CMW could act as aluminous corrector in the clinker matrix. Besides, if CMW contains a residual combustion power, it could contribute to save fossil fuel substituting petcoke in clinker production process.

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Synthesis and Hydration Characteristic of Geopolymer

Apr 16, 2020  characteristic leaching procedure (TCLP) was performed. The hydration products were analyzed with x-ray di ractometry (XRD), Fourier transform infrared (FTIR) and Mössbauer. Finally, the hydration process characteristics of the LSS-based geopolymer were proposed and the behavior of iron was discussed. 2. Materials and Methods 2.1. Materials

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