The Effect of the Physical Properties of Particles of Bulk-Blended Fertilizers on Segregation by Coning

Silva, G.A. da

doi:10.1590/s0104-66321997000300011

Cited by 7 publications

(2 citation statements)

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“…Two tons of GF were purchased, being divided into two formulations: 04-14-08 (GF1) and 04-30-10 (GF2). According to Silva (1997), a mineral source with a high density, such as phosphorus, tends to directly influence fluidity, considering that it is one of the main types of particle movement resulting from segregation.…”

Section: Characterization Of Granulated Fertilizersmentioning

confidence: 99%

Interference of Operating Speed and Physical Properties of Granulated Fertilizers With Their Deposition

et al. 2022

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Uniformity in the deposition of granulated fertilizers in the seed furrow is essential for crop development and productivity. Quantitative (dose and flow) and qualitative factors (segregation and formulation) influence granulated fertilizer distribution throughout its application. This experiment aimed to compare the deposition of two granulated fertilizers with different chemical formulations (04-14-08 and 04-30-10), using the helical overflow metering mechanism at three different operating speeds (4.0, 7.0, and 10.0 km h −1 ), simulated on an electronic bench. The granulated fertilizers were analyzed for particle size, density, angle of repose, and water content. On the other hand, the deposition data were subjected to descriptive statistics and frequency histograms. The angle of repose and water content did not differ between fertilizers, while the density difference was not significant. The granulated fertilizer 04-30-10 presented the most uniform particle size compared to the granulated fertilizer 04-14-08. The higher particle size uniformity was responsible for a more homogeneous deposition in the seed furrow for the granulated fertilizer 04-30-10 at a speed of 4.0 km h −1 , followed by 7.0 km h −1 .

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Section: Characterization Of Granulated Fertilizersmentioning

confidence: 99%

Interference of Operating Speed and Physical Properties of Granulated Fertilizers With Their Deposition

et al. 2022

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“…Typically, secondary and micronutrients are blended with primary nutrients to increase the overall mass spread per unit area and applied with conventional equipment designed for field production (Mortvedt, 1991). However, the bulk blending of fertilizers with different sizes and physical properties has challenges (Gerhard et al., 2015; Johanson, 1988; Silva, 1997). The angle of repose, friction coefficient, and particle resilience result in material segregation during the application, transportation, and loading–unloading (Carson & Marinelli, 1994).…”

Section: Introductionmentioning

confidence: 99%

Effects of fused and blended fertilizers on maize yield and soil properties

2022

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The deficiency of secondary and micronutrients negatively affects plant metabolic functions and reduces crop yields. These nutrients are applied in small quantities (<10 kg ha −1 ) and are physically blended or chemically fused with primary nutrients to enhance uniformity of application. A 3-yr study (2012)(2013)(2014) was conducted to evaluate the effects of fall or spring-applied fertilizer N with or without P and N-P fertilizers containing S and Zn (blended or fused) on soil properties, leaf chlorophyll, and maize (Zea mays L.) yield in Nebraska. Response variables were measured for additional 2 yr residual years [RYs]). Soil Mehlich-3 P was low (14 mg kg −1 ) at the onset of the experiment and adding P increased grain yield by 10% compared with N only treatment in 2013-2015. Grain yields were similar in treatments with S and Zn fused (9.7-12.4 Mg ha −1 ) or blended (9.7-12.2 Mg ha −1 ) in all years (2012)(2013)(2014)(2015)(2016). A yield benefit of adding S and Zn was recorded only 1 yr (2015: the first RY) (12.3 and 11.6 Mg ha −1 in NP treatments with and without S and Zn). Except for 2012, all fertilized treatments had greater yields than the control in 2013-2016. The 2012 was a dry year, where yield was low across the treatments (1.6-2.1 Mg ha −1 ) suggesting minimal benefits of adding primary nutrients (N, P), let alone S or Zn, when moisture is limiting. It is warranted that blended and fused fertilizers are evaluated under specific conditions where soils are deficient in constituent nutrients.

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Influence of Longitudinal Vortex Generator Configuration on the Hydrodynamics in a Novel Spouted Bed

Huang

Zhang

et al. 2018

Chem Eng & Technol

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The gas-solid flow in a cylindrical spouted bed with a pair of spherical longitudinal vortex generators (LVGs) was numerically investigated by a two-fluid model with kinetic theory for granular flow. Simulations and analyses were conducted on five types of spouted beds: a conventional spouted bed without disturbance units as well as spouted beds with a pair of LVGs in which the radius of spheres installed on the LVGs had four different dimensions. Results of the computational fluid dynamics demonstrate that the fountain height decreases with larger radius, and the influence range of the longitudinal vortex increases with the greater radius, both for the gas phase and particle phase. The turbulent kinetic energy of the gas phase along the radial and axial directions in the spouted bed was also promoted significantly by the longitudinal vortex and increased with larger radius, which is due to the higher LVG volume.

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The Effect of the Physical Properties of Particles of Bulk-Blended Fertilizers on Segregation by Coning

Cited by 7 publications

References 0 publications

Interference of Operating Speed and Physical Properties of Granulated Fertilizers With Their Deposition

Interference of Operating Speed and Physical Properties of Granulated Fertilizers With Their Deposition

Effects of fused and blended fertilizers on maize yield and soil properties

Influence of Longitudinal Vortex Generator Configuration on the Hydrodynamics in a Novel Spouted Bed

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