Calcination of kaolinite clay particles for cement production: A modeling study

Teklay, Abraham; Yin, Chungen; Rosendahl, Lasse; Bøjer, Martin

doi:10.1016/j.cemconres.2014.04.002

Cited by 42 publications

(17 citation statements)

References 36 publications

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“…The model presented in this paper can be extended for pyrolysis of biomass pellets by properly reformulating the previous 1D particle conversion models [15,[29][30][31] and integrating them into the validated 3D modelling framework.…”

Section: Extending the Model For Pyrolysis Of Biomass Pelletsmentioning

confidence: 99%

“…Based on the common assumptions (e.g., homogeneous composition and local thermal equilibrium among solid, liquid and gas phases within particles) and combined with appropriate boundary conditions, a few 1D particle thermochemical conversion models have been successfully developed using the finite volume method to update the transient velocity, temperature and species profile within various particles in our previous works [15,[29][30][31]. The model presented in this paper can be extended for pyrolysis of biomass pellets by properly reformulating the previous 1D particle conversion models [15,[29][30][31] and integrating them into the validated 3D modelling framework.…”

Section: Extending the Model For Pyrolysis Of Biomass Pelletsmentioning

confidence: 99%

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Modelling of heating and evaporation of n-Heptane droplets: Towards a generic model for fuel droplet/particle conversion

Yin

2015

Fuel

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Section: Extending the Model For Pyrolysis Of Biomass Pelletsmentioning

confidence: 99%

Section: Extending the Model For Pyrolysis Of Biomass Pelletsmentioning

confidence: 99%

Modelling of heating and evaporation of n-Heptane droplets: Towards a generic model for fuel droplet/particle conversion

Yin

2015

Fuel

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“…Several authors have investigated the kinetics parameters of the dehydroxylation of clay minerals and decomposition of calcium carbonates . Kaolinite is the main clay mineral applied in ceramic tile compositions.…”

Section: Introductionmentioning

confidence: 99%

“…Kaolinite is the main clay mineral applied in ceramic tile compositions. Decomposition of this phase, according to Equation , has been studied by Gasparini et al, Ptácek et al, Teklay et al, and Ferrer et al . Decomposition of calcium carbonate, according to Equation , has been studied by Ferrer et al, Escardino et al, Garcia‐Ten et al, and Escardino, Garcia‐Ten, and Feliu .…”

Section: Introductionmentioning

confidence: 99%

Effect of specimen geometry on kinetics of thermal decomposition of minerals in porous ceramic tiles

Cargnin

Kammer

Souza

et al. 2019

Int J Applied Ceramic Tech

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Porous ceramic tiles are used as covering for indoor vertical surfaces in buildings. Clay and limestone are the starting raw materials. The firing step consolidates the product's properties in the manufacturing process. In this step several reactions occur, among them are the dehydroxylation of the clay minerals and decomposition of the carbonates. This study determined the kinetics parameters associated with the decomposition of these 2 minerals. Two different methods of samples preparation were investigated. In the first method, 60 mg of a spray‐dried powder was submitted to analysis in traditional thermogravimetric equipment. In the second method, compacted specimens with dimensions of 80 × 20 × 2.5 mm³ and a mass of 7 g, compacted at 25 MPa, were submitted to analysis using customized thermogravimetric apparatus. The curves were obtained for 6 different heating rates between 2.5 and 20 K min−1. The activation energy, the pre‐exponential factor of the specific velocity equation, and the reaction mechanism were determined. Depending on the methods and compaction degree the activation energy varies from 177.0 to 224.7 kJ mol−1 and from 188.5 to 230.2 kJ mol−1 for kaolinite and calcium carbonate, respectively. For accurate measurement of the activation energy, the heat transfer needs to be considered for each particular experimental configuration.

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“…where T L is the particle core temperature, εL is the emissivity of the particle, L A P means the outer core of the particle [15]. Fig.…”

Section: Modeling the Calcination Process Of Clinker Meal Particlesmentioning

confidence: 99%

Influence of calcination process on the formation of selected air pollutants

et al. 2017

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Abstract. The subject of the study is to analyze the phenomena of thermal flow in the precalcinator chamber of the exchanger's furnace tower including the combustion of coal dust and decarbonisation of raw lime powder. During the research were provided development of a mathematical model of particulate solid fuels combustion, calcining the raw material, NO x and CO x formation. Moreover conducting the number for the current and the upgraded design of the precalcinator and analysis of the results. In this study, a mathematical model based on Euler's method to describe the motion of the gas phase and the Lagrange method to describe the motion of particles [1][2][3][4]. In the calculations there were assumed fractional particles raw material and fuel, and the following processes: flow of exhaust gases from the rotary kiln through the precalcinator chamber, heat exchange between the particles of raw material and exhaust gases, the additional fuel combustion in the precalcinator, the process of raw material calcination, transformation of gaseous substances, effect of the additional (tertiary) air delivery on the processes in the chamber.

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Calcination of kaolinite clay particles for cement production: A modeling study

Cited by 42 publications

References 36 publications

Modelling of heating and evaporation of n-Heptane droplets: Towards a generic model for fuel droplet/particle conversion

Modelling of heating and evaporation of n-Heptane droplets: Towards a generic model for fuel droplet/particle conversion

Effect of specimen geometry on kinetics of thermal decomposition of minerals in porous ceramic tiles

Influence of calcination process on the formation of selected air pollutants

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