Effects of Grinding Corn with Different Moisture Content on Subsequent Particle Size and Flowability

Braun, Michaela; Dunmire, Kara M.; Evans, Caitlin E.; Stark, Charles R.; Woodworth, J. C.; Paulk, Chad B.

doi:10.3390/pr9081372

Cited by 4 publications

(3 citation statements)

References 15 publications

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“…An increase in vitrousness and moisture content leads to an increase in force and energy demand in the process of grain comminution [ 79 , 80 , 81 , 82 , 83 , 84 ]. Generally, in the case of hard materials, finer product can be obtained [ 86 ]. Looking at the difference in the corn and rice grain structure and the grinding mechanism, it should be pointed out that white rice was used (after bran and germ removal), so mainly the endosperm was subjected to grinding, which has high glassy properties.…”

Section: Resultsmentioning

confidence: 99%

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: Resultsmentioning

confidence: 99%

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

et al. 2022

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“…As the granular material moisture increases, the bulk density decreases [6,12]. A smaller particle size can decrease the granular material flowability [8,13].…”

Section: Introductionmentioning

confidence: 99%

Physical Properties of Moist, Fermented Corn Grain after Processing by Grinding or Milling

Blazer,

Shinners,

Kluge

et al. 2024

AgriEngineering

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A novel biomass production system, integrating the co-harvesting and co-storage of moist corn grain and stover, promises a reduction in delivered feedstock costs. In this innovative method, the dry grain traditionally utilized for feed or biofuel production will now be processed at a considerably greater moisture content. The adoption of this approach may necessitate a substantial redesign of existing material handling infrastructure to effectively accommodate the handling and storage of moist grain after processing by milling or grinding. A comprehensive study was conducted to quantify the physical properties of this grain after processing with a knife processor or a hammermill. The geometric mean particle size, bulk and tapped density, sliding angle, material coefficient of friction, and discharged angle of repose were quantified. Five grain treatments, either fermented or unfermented, and having different moisture contents, were used. After processing, the moist, fermented ground grain exhibited a significantly smaller particle size compared to the dry grain. Additionally, both moist processed grains resulted in a decreased bulk density and increased material sliding angle, friction coefficient, and angle of repose. The examined metrics collectively suggest that handling, mixing, and storing moist ground grain will pose significant challenges compared to conventional dry ground grain. This increased difficulty may lead to substantially higher costs, a crucial factor that must be carefully considered when evaluating the overall economics of implementing this new biomass production system using combined harvesting and storage of corn grain and stover.

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“…Hammermills are among the most commonly used size-reduction equipment in the feed industry because of their high throughput and versatility in grinding different materials. Yellow dent #2 corn is a common grain type used for feed in the U.S. Paulk and colleagues investigated the effects of whole-corn moisture before grinding and hammermill screen size on subsequent ground corn moisture, particle size, and flowability [4]. They further evaluated the effects of hammermill tip speed, assistive airflow, and screen sizes on hammermill throughput and characteristics of ground corn [5].…”

mentioning

confidence: 99%

Processing and Properties Analysis of Grain Foods

2022

Processes

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Effects of Grinding Corn with Different Moisture Content on Subsequent Particle Size and Flowability

Cited by 4 publications

References 15 publications

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

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

Physical Properties of Moist, Fermented Corn Grain after Processing by Grinding or Milling

Processing and Properties Analysis of Grain Foods

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