Modelling of the Fine-Grained Materials Briquetting Process in a Roller Press with the Discrete Element Method

Bembenek, Michał; Buczak, Magdalena; Baiul, K. V.

doi:10.3390/ma15144901

Cited by 15 publications

(10 citation statements)

References 40 publications

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“…In this part of the briquette from the front side, one can therefore expect the greatest packing of the material, resulting from the greatest compacting pressure acting at this point [46]. These results coincide with the simulation tests carried out for briquetting of fine-grained materials using the discrete element method [50]. The temperature distribution curve for material M4 differs from the other curves.…”

Section: Temperature Distribution On Briquette Surfacessupporting

confidence: 78%

The Use of Thermography to Determine the Compaction of a Saddle-Shaped Briquette Produced in an Innovative Roller Press Compaction Unit

Bembenek

Uhryński

2022

Acta Mechanica Et Automatica

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The unit compacting pressure in the fine-grained material consolidation process in the roller press can reach >100 MPa and is a parameter that results, among other things, from the properties of the consolidated material and the compaction unit geometry. Achieving the right pressure during briquetting is one of the factors that guarantee the proper consolidation and quality of briquettes. The distribution of the temperature on the surface of the briquettes correlates with locally exerted pressure. The present work aimed to analyse the briquetting process of four fine-grained materials in a roller press equipped with saddle-shaped briquette-forming rollers based on images obtained from the thermography conducted immediately after their consolidation. The tests were carried out in a roller press that was equipped with forming rollers of 450-mm diameter and having a cavity with a volume of 4 cm3, as described by patent PL 222229 B1. Two mixtures of hydrated lime with 9.1 wt% and 13.0 wt% water, a mixture of scale and a mixture of electric arc furnace (EAF) dust were used for the tests. In most mixtures, the highest temperatures were achieved in the middle-upper part of the briquettes. The briquettes from the EAF dust mixture heated locally the most on the surface up to 37.7 °C. The difference between the maximum briquette temperature and the ambient temperature was 20.2 °C.

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Section: Temperature Distribution On Briquette Surfacessupporting

confidence: 78%

The Use of Thermography to Determine the Compaction of a Saddle-Shaped Briquette Produced in an Innovative Roller Press Compaction Unit

Bembenek

Uhryński

2022

Acta Mechanica Et Automatica

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“…The proposed scale-up model built based on Equations ( 6)-( 9) is essential for improving stirred mill operational parameters and design. When the scale-up model allows for the accurate prediction of the operating parameters, it is possible to reduce the cost of the re-design of the full scale (industrial mill), and all the necessary improvements can be made on the laboratory prototype or during numerical modeling [62][63][64]. This reduces the time and cost of experiments for adjusting optimal operational parameters for grinding different materials.…”

Section: Discussionmentioning

confidence: 99%

Relation between Scale-Up and Life Cycle Assessment for Wet Grinding Process of Pumice

Mannheim

Kruszelnicka

2023

Energies

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This study examines the grinding process of pumice based on the dry and wet laboratory measurements, scale-up method, and life cycle assessment. This research’s main goal was to set up the relation between scale-up and life cycle assessment results for the wet grinding process with the help of mathematical equations. Within the first research works, basic grinding testing in a laboratory dry Bond mill was accomplished. This step allowed the description of the estimated particle size distribution, median particle size, specific grinding work, and grindability index number of pumice. The second step was the determination of power consumption and scale-up in a laboratory stirred media mill, and it involved the assessment of resources, primary energies, and environmental impacts of wet grinding using GaBi 8.0 software. According to the results, we obtain life cycle emission factors by introducing five coefficients for grinding in laboratory and industrial conditions. These constants depend on the external dimensions of the mill and can be expressed by a derived scale constant from the scale-up. Research results enable the industry to make a prognosis for industrial plants based on the integration between life cycle assessment and scale-up of the pilot grinding processes.

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“…This process is carried out by mapping a laboratory test that determines a physical property of bulk material, for example reflecting a test of the natural angle of repose, measuring the bulk density, etc [30,31], physical properties of bulk material, and then reflecting these tests to determine the input parameters of the model [32,33].…”

Section: Fig 2 Algorithm Of Calibration Procedures For the Dem Materi...mentioning

confidence: 99%

Numerical Simulations of the Exploitation Parameters of the Rotary Feeder

Karwat

Rubacha

Stańczyk

2022

Management Systems in Production Engineering

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The article presents the problems of determining the mass efficiency of a rotary feeder depending on the selection of design parameters of the device, such as outer diameter, number of blades and rotational speed of the rotor. The hitherto theoretical methods of calculating the feeder efficiency were presented, as well as a new method of determining the device operation parameters was proposed. For this purpose, the numerical Discrete Element Method was used, which allowed simulating the transport of limestone powder in a cell feeder with various design variants. The results of the tests showed that the above design parameters affect the instantaneous efficiency of the feeder and thus impact the distribution of the dosed material during the operation of the device. Depending on the design solution, the simulation results gave information on the fill factor of the feeders. The study showed a significant potential of DEM simulation in the design of circular feeders intended for dosing bulk materials.

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Modelling of the Fine-Grained Materials Briquetting Process in a Roller Press with the Discrete Element Method

Cited by 15 publications

References 40 publications

The Use of Thermography to Determine the Compaction of a Saddle-Shaped Briquette Produced in an Innovative Roller Press Compaction Unit

The Use of Thermography to Determine the Compaction of a Saddle-Shaped Briquette Produced in an Innovative Roller Press Compaction Unit

Relation between Scale-Up and Life Cycle Assessment for Wet Grinding Process of Pumice

Numerical Simulations of the Exploitation Parameters of the Rotary Feeder

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