Modelling of fertilizer drying in a rotary dryer: parametric sensitivity analysis

Abstract

-This study analyzed the influence of the following parameters: overall volumetric heat transfer coefficient, coefficient of heat loss, drying rate, specific heat of the solid and specific heat of dry air on the prediction of a model for the fertilizer drying in rotary dryers. The method of parametric sensitivity using an experimental design was employed in this study. All parameters studied significantly affected the responses of the drying model. In general, the model showed greater sensitivity to the parameters drying rate and overall volumetric heat transfer coefficient.

Monoammonium phosphate (MAP) fertilizer drying kinetics in tray dryer

“…From Figure 4, one comes to the same conclusion taken form Figure 3: the drying rate is not affected by particle size but is strongly affected by temperature. The same kind of positive influence of temperature was shown by Abbasfard et al [19], Silva et al [14] and Arruda [15,20]. Drying curves obtained by Arruda for superphosphate fertilizer show that the drying rate was clearly influenced by temperatures between 75 and 95 °C [15].…”

“…Kucuck et al [13] presented a comprehensive review of thin-layer drying models available in the literature. Based on the assessment they carried out, Page and Modified Page [8][9][10][11][13][14][15][16], two-term [3,8,11,16], Henderson and Pabis [5--9,11,16], Midilli et al [3,4,6,8,11,16], Verma et al [3,6,8,11,16,17] and Aghbashlo et al [6][7][8]11] are among the ones that offer better results.…”

“…Rotary dryers are the usual choice for drying fertilizers [14,15,[18][19][20][21]. This sort of dryer provides an intermittent process because the material is periodically exposed to the dry air.…”

“…He used temperatures between 61.8 and 95 °C and air velocities between 0.58 and 5.0 m/s. His results were then used in the work of Silva et al [14] and Arruda et al [15], who performed a parametric sensitivity analysis in modelling of fertilizer drying in rotary dryers.…”

Analisis biaya pengolahan pasir zirkon (ZrSiO4) menjadi pasir zirkon berkadar ZrO2 ≥65,5 % dan micronized zircon

“…Konsentrat zirkon ini dikeringkan di dalam rotary dryer untuk menghilangkan kadar air kemudian dimasukkan ke dalam magnetic separator untuk memisahkan material magnet dari non magnet. (Silva, 2012). Proses selanjutnya adalah dengan menggunakan mesin high tension separator untuk memisahkan mineral-mineral yang bersifat konduktor, seperti ilmenit dari pasir kuarsa bersifat non-conductor.…”