Longitudinal mixing in horizontal rotary drum reactors

Hehl, M.; Kröger, Heinz; Helmrich, Harald; Schügerl, K.

doi:10.1016/0032-5910(78)80005-9

Cited by 36 publications

(11 citation statements)

References 12 publications

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“…The VRT were found to diminish with increasing feed rate (see Fig.6c). By qualitative comparison, these results agreed well with those published previously [7,9]. Exit dam height.…”

Section: Eect Of Materials Of Diering Physical Propertiessupporting

confidence: 91%

Effect of lifter shape and operating parameters on the flow of materials in a pilot rotary kiln: Part I. Experimental RTD and axial dispersion study

et al. 2015

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Experiments on the residence time distribution (RTD) and axial dispersion for the continuous ow of sand and broken rice, through a pilot scale rotary kiln equipped with lifters, are reported. Factors such as the rotational speed, the kiln slope, the materials ow rate and the exit dam height have been studied. Furthermore, two proles of lifters were used: straight lifters (SL) and rectangular lifters (RL). Thus, under varying conditions the RTDs were obtained by the typical stimulus response test using a tracer and the corresponding axial dispersion coecients were determined. The validity of the axial dispersion model was assessed in this study, and the model was found to match well with the experimental data. A large number of experiments was conducted, so that, a mathematical model could be developed to predict the axial dispersion coecient of the solid particles within the kiln. Comparisons with reported models are also discussed.The second part of this study will be concerned with the experimental kiln hold-up and the mean residence time (MRT) of solid particles.

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“…The VRT were found to diminish with increasing feed rate (see Fig.6c). By qualitative comparison, these results agreed well with those published previously [7,9]. Exit dam height.…”

Section: Eect Of Materials Of Diering Physical Propertiessupporting

confidence: 91%

Effect of lifter shape and operating parameters on the flow of materials in a pilot rotary kiln: Part I. Experimental RTD and axial dispersion study

et al. 2015

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“…4c). This tendency is similar to the one observed by some other researchers [5][6][7]24]. When increasing the exit dam height the MRT slightly increased (see Fig.…”

Section: Influence Of Operating Conditionssupporting

confidence: 90%

Effect of lifter shape and operating parameters on the flow of materials in a pilot rotary kiln: Part II. Experimental hold-up and mean residence time modeling

et al. 2015

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International audienceExperiments were carried out on a pilot scale rotary kiln equipped with lifters at room temperature to investigate the effects of the kiln slope, rotational speed, mass flow rate of materials, and exit dam height on the hold-up and the mean residence time (MRT). The MRT was determined from the residence time distribution measurements as detailed in Part I of this work. Two granular solids having different properties were used: sand and broken rice. Furthermore, two shapes of lifters were compared to determine the influence of lifter geometry: straight lifters (SL) and rectangular lifters (RL). A new model to predict the MRT was established by means of a dimensional analysis. The correlation not only gave good agreement with the experimental data from the present study, but also demonstrated good predictive performances when applied to published experimental data of other kilns; the model is applicable for inclined kilns that process materials in cascading (tumbling) motion, whether or not equipped with lifters or fitted with dams at the outlet end

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“…We assume that the parameters influencing the end depth are the same as those influencing the solid depth profile inside the kilns. Saeman's model [6] has been proved applicable for a different load in kilns by a lot of researchers [5,7,8,10,11]. From Eq.…”

Section: Dimensionless Descriptionmentioning

confidence: 99%

“…Afacan and Masliyah [10] studied the flow of granular solid in a horizontal drum with and without lifters and end constrictions. Their experimental results were compared with equations from different authors [6,8,9]. Based on numerical solutions of Saeman's equation, they estimated the solid end depth to be twice the particle diameter h 0 =2d p in the drum without end constriction.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of solid bed depth at the discharge end of rotary kilns

et al. 2010

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Longitudinal mixing in horizontal rotary drum reactors

Cited by 36 publications

References 12 publications

Effect of lifter shape and operating parameters on the flow of materials in a pilot rotary kiln: Part I. Experimental RTD and axial dispersion study

Effect of lifter shape and operating parameters on the flow of materials in a pilot rotary kiln: Part I. Experimental RTD and axial dispersion study

Effect of lifter shape and operating parameters on the flow of materials in a pilot rotary kiln: Part II. Experimental hold-up and mean residence time modeling

Experimental investigation of solid bed depth at the discharge end of rotary kilns

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