Aspects regarding particle size distribution and energy consumption when grinding husked rice seeds

Voicu, G.; Constantin, George; Stefan, Elena; Tudor, Paula; Munteanu, Mariana

doi:10.22616/erdev.2020.19.tf317

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…In both cases, the specific comminution energy increased with the size reduction ratio. Similar relationships were observed for other types of grinders used for granular materials, such as ball mills [ 14 ], hammer mills [ 1 , 17 ], knife mills [ 50 ], and roller mills [ 15 , 16 ]. An increase in comminution energy with an increase in size reduction ratio is due to the fact that with the decreasing size of ground material, the comminution energy increases as the internal flaws decrease (with the size decrease); thus, breakage probability is reduced, and subsequent size reduction involves higher energy input [ 1 ].…”

Section: Resultssupporting

confidence: 72%

Energy-Dependent Particle Size Distribution Models for Multi-Disc Mill

et al. 2022

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Comminution is important in the processing of biological materials, such as cereal grains, wood biomass, and food waste. The most popular biomaterial grinders are hammer and roller mills. However, the grinders with great potential in the processing of biomass are mills that use cutting, e.g., disc mills. When it comes to single-disc and multi-disc grinders, there are not many studies describing the relationships between energy, motion, material, and processing or describing the effect of grinding, meaning the size distribution of a product. The relationship between the energy and size reduction ratio of disc-type grinder designs has also not been sufficiently explored. The purpose of this paper was to develop models for the particle size distribution of the ground product in multi-disc mills depending on the variable process parameters, i.e., disc rotational velocity and, consequently, power consumption, and the relationship between the grinding energy and the shape of graining curves, which would help predict the product size reduction ratio for these machines. The experiment was performed using a five-disc mill, assuming the angular velocity of the grinder discs was variable. Power consumption, product particle size, and specific comminution energy were recorded during the tests. The Rosin–Rammler–Sperling–Bennet (RRSB) distribution curves were established for the ground samples, and the relationships between distribution coefficients and the average angular velocity of grinder discs, power consumption, and specific comminution energy were determined. The tests showed that the specific comminution energy increases as the size reduction ratio increases. It was also demonstrated that the RRSB distribution coefficients could be represented by the functions of angular velocities, power consumption, and specific comminution energy. The developed models will be a source of information for numerical modelling of comminution processes.

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Section: Resultssupporting

confidence: 72%

Energy-Dependent Particle Size Distribution Models for Multi-Disc Mill

et al. 2022

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“…The above relations are in line with the results for other mills presented in studies [16,56,62,[72][73][74][75][76]. The relation between power consumption and total increase in disc angular speed is a result of a simple dependence that power is the product of torque and angular speed multiplication, which for idle run of the multi-disc mill (without batch) is a linear dependance and is more than half of the total power requirement, even for a batch loaded mill as was presented in [77].…”

Section: Discussionsupporting

confidence: 91%

Study of the Relationships between Multi-Hole, Multi-Disc Mill Performance Parameters and Comminution Indicators

et al. 2021

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The knowledge of a grinder structure, its performance parameters and characteristics of biomaterials breakage are crucial for this research whose aim is to determine the dependencies between performance parameters and comminution indicators. The aim of this study is to investigate the relationships between multi-disc mill performance parameters such as discs angular speed, batch dosing speed and comminution characteristics: power consumption, specific energy consumption, throughput and size reduction ratio. To achieve these goals, an experiment was conducted on a five-disc mill with a special monitoring system. The research program was established, with disc angular speed at different configurations and different batch dosing speeds. The results show that power consumption, specific energy consumption and size reduction ratio depend on the total increase in angular speed of discs SΔω in such a way that an increase in SΔω causes an increase in the abovementioned comminution indicators. In turn, an increase in batch dosing speed W causes an increase in throughput. The fitting curves of comminution indicators in dependence of selected performance parameters are also presented in this study.

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Aspects regarding particle size distribution and energy consumption when grinding husked rice seeds

Cited by 2 publications

References 10 publications

Energy-Dependent Particle Size Distribution Models for Multi-Disc Mill

Energy-Dependent Particle Size Distribution Models for Multi-Disc Mill

Study of the Relationships between Multi-Hole, Multi-Disc Mill Performance Parameters and Comminution Indicators

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