Marteletes desgastados afetam negativamente as características operacionais da moagem e físicas do milho processado em moinho do tipo martelo

Folador, Daniel Nogueira; Boiago, Marcel M.; Carvalho, Paulo Levi de Oliveira; Paiano, Diovani

doi:10.17523/bia.2018.v75.e1423

Cited by 6 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The increase in grinding intensity obtained by reducing the screen hole diameter (screen used to surround the grinding chamber in hammer mill) makes it difficult for the corn to leave the crushing chamber in the grain process, with a consequent greater number of hammer impacts on the corn particles, which leads to reduced PS and GSD (Table 2). This reduction in GSD with the reduction in PS is a relatively common behavior and has already been reported by Paiano et al (2014); Rojas and Stein (2015); Chiodelli, Folador, Boiago, Carvalho, and Paiano (2018) and Gebhardt et al (2018); said behavior is associated with grain reprocessing, which is characterized by reduced particle size variability.…”

Section: Feed and Diets Characteristicssupporting

confidence: 65%

Corn physical characteristics on piglet performance

Paiano,

Silva,

Zanotto

et al. 2023

Acta Sci. Anim. Sci.

View full text Add to dashboard Cite

This study aimed to correlate the physical characteristics of ground corn, at different crushing intensities, with the zootechnical performance of piglets in the nursery phase. Forty piglets (20 castrated males and 20 females) with an initial average weight of 15.7±1.98 kg and final weight of 32.5±3.27 kg were used. They were subjected to the same type of experimental diet (4% of commercial premix for the phase, 29% of soybean meal, and 67% of ground corn), with the only difference being the corn grinding process. The corn used was fractionated into five portions, and each one of them was crushed in a hammermill equipped with a different screen hole diameter (2; 2.5; 3; 3.5 and 4 mm). Which resulted in ground corn with the following particle sizes (PS): 518, 580, 628, 706 and 740 μm, and the following corn geometric standard deviations (GSD): 1.72, 1.71, 1.75, 1.80 and 1.90, respectively. The piglets were distributed in a completely randomized design with five treatments and four replications, with the experimental units being formed by pens with two piglets each. There was no effect (p > 0.10) from grinding intensities on daily feed intake (DFI) and daily weight gain (DWG). Conversely, there was an effect (p < 0.10) from different grinding intensities on feed conversion (FC). The PS and GSD of both the corn and diet, as well as the corn fractions retained on the 4-, 2- and 1.2-mm test sieves showed positive correlations with FC (p < 0.05). On the other hand, the corn fractions retained on the 0.6-, 0.3- and 0.15-mm teste sieves showed negative correlations with FC (p < 0.05). The linear model was the one that fitted the estimated data into the data observed for FC. A corn PS reduction from 740 to 580 μm promoted a linear improvement in FC. The use of corn fractions, retained on the 1-, 2- and 0.3-mm test sieves, and the use of corn GSD and diet GSD as independent variables showed a higher R² than that obtained with the use of corn PS as an independent variable in linear equations for estimating FC.

show abstract

Section: Feed and Diets Characteristicssupporting

confidence: 65%

Corn physical characteristics on piglet performance

Paiano,

Silva,

Zanotto

et al. 2023

Acta Sci. Anim. Sci.

View full text Add to dashboard Cite

show abstract

Section: Wear Of Size Reduction Equipmentmentioning

confidence: 99%

“…In the case of hammer mill, severely worn hammers can reduce the machine productivity up to 55%, consume more electricity, and increase the particle size and geometric deviation. 141 Wearing chipper knives in wood cutting has been repeatedly reported to cause linear proportional losses of chipping productivity and fuel economy. 142 For a drum chipper, dull blades can increase the time required to reduce the size of a unit mass of feedstock by 30% with up to 39% inflation in fuel consumption.…”

Section: ■ Wear Of Size Reduction Equipmentmentioning

confidence: 99%

Understanding the Impact of Lignocellulosic Biomass Variability on the Size Reduction Process: A Review

Oyedeji

Gitman

et al. 2020

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

The importance of size reduction to the commercial deployment of biomass utilization technologies cannot be overemphasized. Size reduction is necessary to create good flowing, easily digestible lignocellulosic biomass. However, inefficiencies and inconsistencies have not been well addressed for the process of size reduction. This has motivated quite a few research studies, some of which have reported the influence of process variables and pretreatment on the size reduction performance as well as the development of novel size reduction equipment and empirical mathematical models. In this Perspective, we present a systematic and critical evaluation of the state of lignocellulosic biomass size reduction research to provide insights for engineers and scientists for future development and investigation. We first briefly discuss the structural biology and failure mode of lignocellulosic biomass. Then, we present a comprehensive, data-driven picture of the interactions among lignocellulosic biomass attributes, size reduction process variables, pretreatment processes, and size reduction process performance (as defined by product characteristics and size reduction energy consumption). The sizing equipment tool wear issues are also summarized. Finally, we highlight some existing gaps and future research opportunities for lignocellulosic biomass size reduction to inform the development of newer technologies that could effectively produce high-value lignocellulosic biomass particles.

show abstract

“…10 Unfortunately, such biomass conversion equipment experiences wear issues that significantly impact efficiency and cost, as found in the Integrated Biorefineries Optimization projects supported by the U.S. Department of Energy. 11 A negative impact was observed for hammer wear in corn grinding. 12 Severely worn hammers worsened the machine productivity by 55.1%, consumed more electricity, and increased particle size and geometric deviation.…”

Section: ■ Introductionmentioning

confidence: 99%

Material Characterization-Based Wear Mechanism Investigation for Biomass Hammer Mills

Roy

Lee

Lacey

et al. 2020

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Biomass, as harvested, is composed of inorganic compounds both intrinsically and extrinsically and can be abrasive. The present study investigates the wear modes and mechanisms of two types of blades of hammer mills used in biomass size reduction (impacting the particle size and distribution) and densification (impacting the size, shape, and density). The dominant wear modes for the stage 1 steel blades are determined to be erosive and polishing wear. For the stage 2 blades with a carbide weld overlay, the main wear mechanisms are erosion and fracture. Partial replacement of Co by Fe in the outer layer of the carbide grits, likely induced by diffusion during high-temperature welding, has been correlated to the observed microcracking. The microcracking is believed to weaken the grit strength and fracture toughness to make the overlay prone to fracture and erosion due to repetitive contact with the inorganic contents in chopping biomass.

show abstract

Marteletes desgastados afetam negativamente as características operacionais da moagem e físicas do milho processado em moinho do tipo martelo

Cited by 6 publications

References 7 publications

Corn physical characteristics on piglet performance

Corn physical characteristics on piglet performance

Understanding the Impact of Lignocellulosic Biomass Variability on the Size Reduction Process: A Review

Material Characterization-Based Wear Mechanism Investigation for Biomass Hammer Mills

Contact Info

Product

Resources

About