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Article

Evaluation of Hammermill Tip Speed, Air Assist, and Screen Hole Diameter on Ground Corn Characteristics

1
Department of Grain Science & Industry, Kansas State University, Manhattan, KS 66503, USA
2
JBS Foods, Greeley, CO 80634, USA
*
Author to whom correspondence should be addressed.
Processes 2021, 9(10), 1768; https://doi.org/10.3390/pr9101768
Submission received: 18 August 2021 / Revised: 9 September 2021 / Accepted: 12 September 2021 / Published: 1 October 2021
(This article belongs to the Special Issue Processing and Properties Analysis of Grain Foods)

Abstract

This study was performed to evaluate hammermill tip speed, assistive airflow, and screen hole diameter on hammermill throughput and characteristics of ground corn. Corn was ground using two Andritz hammermills measuring 1 m in diameter each equipped with 72 hammers and 300 HP motors. Treatments were arranged in a 3 × 3 × 3 factorial design with three tip speeds (3774, 4975, and 6176 m/min), three screen hole diameters (2.3, 3.9, and 6.3 mm), and three air flow rates (1062, 1416, and 1770 fan revolutions per minute). Corn was ground on three separate days to create three replications and treatments were randomized within day. Samples were collected and analyzed for moisture, particle size, and flowability characteristics. There was a 3-way interaction (p = 0.029) for standard deviation (Sgw). There was a screen hole diameter × hammer tip speed interaction (p < 0.001) for geometric mean particle size dgw (p < 0.001) and composite flow index (CFI) (p < 0.001). When tip speed increased from 3774 to 6176 m/min, the rate of decrease in dgw was greater as screen hole diameter increased from 2.3 to 6.3 mm. For CFI, increasing tip speed decreased the CFI of ground corn when ground using the 3.9 and 6.3 mm screen. However, when grinding corn using the 2.3 mm screen, there was no evidence of difference in CFI when increasing tip speed. In conclusion, the air flow rate did not influence dgw of corn, but hammer tip speed and screen size were altered and achieved a range of dgw from 304 to 617 µm.
Keywords: corn; hammermill; moisture content; particle size corn; hammermill; moisture content; particle size

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MDPI and ACS Style

Braun, M.; Wecker, H.; Dunmire, K.; Evans, C.; Sodak, M.W.; Kapetanovich, M.; Shepherd, J.; Fisher, R.; Coble, K.; Stark, C.; et al. Evaluation of Hammermill Tip Speed, Air Assist, and Screen Hole Diameter on Ground Corn Characteristics. Processes 2021, 9, 1768. https://doi.org/10.3390/pr9101768

AMA Style

Braun M, Wecker H, Dunmire K, Evans C, Sodak MW, Kapetanovich M, Shepherd J, Fisher R, Coble K, Stark C, et al. Evaluation of Hammermill Tip Speed, Air Assist, and Screen Hole Diameter on Ground Corn Characteristics. Processes. 2021; 9(10):1768. https://doi.org/10.3390/pr9101768

Chicago/Turabian Style

Braun, Michaela, Haley Wecker, Kara Dunmire, Caitlin Evans, Michael W. Sodak, Maks Kapetanovich, Jerry Shepherd, Randy Fisher, Kyle Coble, Charles Stark, and et al. 2021. "Evaluation of Hammermill Tip Speed, Air Assist, and Screen Hole Diameter on Ground Corn Characteristics" Processes 9, no. 10: 1768. https://doi.org/10.3390/pr9101768

APA Style

Braun, M., Wecker, H., Dunmire, K., Evans, C., Sodak, M. W., Kapetanovich, M., Shepherd, J., Fisher, R., Coble, K., Stark, C., & Paulk, C. (2021). Evaluation of Hammermill Tip Speed, Air Assist, and Screen Hole Diameter on Ground Corn Characteristics. Processes, 9(10), 1768. https://doi.org/10.3390/pr9101768

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